diff --git a/docs/html/api/keys/algorithms.html b/docs/html/api/keys/algorithms.html
new file mode 100644
index 0000000..e0c9b41
--- /dev/null
+++ b/docs/html/api/keys/algorithms.html
@@ -0,0 +1,368 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Algorithms &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Key management functions" href="management.html" />
+    <link rel="prev" title="Key policies" href="usage.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="algorithms">
+<span id="id1"></span><h1>Algorithms</h1>
+<div class="section" id="algorithm-categories">
+<h2>Algorithm categories</h2>
+<div class="section" id="PSA_ALG_NONE">
+<span id="c.PSA_ALG_NONE"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_NONE</span></code> (macro)</h3>
+<p>An invalid algorithm identifier value.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_NONE" title="PSA_ALG_NONE">PSA_ALG_NONE</a> ((<a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t">psa_algorithm_t</a>)0)
+</pre>
+<p>Zero is not the encoding of any algorithm.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_HASH">
+<span id="c.PSA_ALG_IS_HASH"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_HASH</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a hash algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_HASH" title="PSA_ALG_IS_HASH">PSA_ALG_IS_HASH</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a hash algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/hashes.html#hash-algorithms"><span class="std std-ref">Hash algorithms</span></a></em> for a list of defined hash algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_MAC">
+<span id="c.PSA_ALG_IS_MAC"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_MAC</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a MAC algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_MAC" title="PSA_ALG_IS_MAC">PSA_ALG_IS_MAC</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a MAC algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/macs.html#mac-algorithms"><span class="std std-ref">MAC algorithms</span></a></em> for a list of defined MAC algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_CIPHER">
+<span id="c.PSA_ALG_IS_CIPHER"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_CIPHER</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a symmetric cipher algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_CIPHER" title="PSA_ALG_IS_CIPHER">PSA_ALG_IS_CIPHER</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a symmetric cipher algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/ciphers.html#cipher-algorithms"><span class="std std-ref">Cipher algorithms</span></a></em> for a list of defined cipher algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_AEAD">
+<span id="c.PSA_ALG_IS_AEAD"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_AEAD</span></code> (macro)</h3>
+<p>Whether the specified algorithm is an authenticated encryption with associated data (AEAD) algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_AEAD" title="PSA_ALG_IS_AEAD">PSA_ALG_IS_AEAD</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is an AEAD algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/aead.html#aead-algorithms"><span class="std std-ref">AEAD algorithms</span></a></em> for a list of defined AEAD algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_SIGN">
+<span id="c.PSA_ALG_IS_SIGN"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_SIGN</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a public-key signature algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_SIGN" title="PSA_ALG_IS_SIGN">PSA_ALG_IS_SIGN</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a public-key signature algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/sign.html#sign-algorithms"><span class="std std-ref">Asymmetric signature algorithms</span></a></em> for a list of defined signature algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_ASYMMETRIC_ENCRYPTION">
+<span id="c.PSA_ALG_IS_ASYMMETRIC_ENCRYPTION"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_ASYMMETRIC_ENCRYPTION</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a public-key encryption algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_ASYMMETRIC_ENCRYPTION" title="PSA_ALG_IS_ASYMMETRIC_ENCRYPTION">PSA_ALG_IS_ASYMMETRIC_ENCRYPTION</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a public-key encryption algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/pke.html#asymmetric-encryption-algorithms"><span class="std std-ref">Asymmetric encryption algorithms</span></a></em> for a list of defined asymmetric encryption algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_KEY_AGREEMENT">
+<span id="c.PSA_ALG_IS_KEY_AGREEMENT"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_KEY_AGREEMENT</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a key agreement algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_KEY_AGREEMENT" title="PSA_ALG_IS_KEY_AGREEMENT">PSA_ALG_IS_KEY_AGREEMENT</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a key agreement algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/ka.html#key-agreement-algorithms"><span class="std std-ref">Key agreement algorithms</span></a></em> for a list of defined key agreement algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_KEY_DERIVATION">
+<span id="c.PSA_ALG_IS_KEY_DERIVATION"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_KEY_DERIVATION</span></code> (macro)</h3>
+<p>Whether the specified algorithm is a key derivation algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_KEY_DERIVATION" title="PSA_ALG_IS_KEY_DERIVATION">PSA_ALG_IS_KEY_DERIVATION</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a key derivation algorithm, <code class="docutils literal"><span class="pre">0</span></code> otherwise. This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="../ops/kdf.html#key-derivation-algorithms"><span class="std std-ref">Key derivation algorithms</span></a></em> for a list of defined key derivation algorithms.</p>
+</div>
+<div class="section" id="PSA_ALG_IS_WILDCARD">
+<span id="c.PSA_ALG_IS_WILDCARD"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_IS_WILDCARD</span></code> (macro)</h3>
+<p>Whether the specified algorithm encoding is a wildcard.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_IS_WILDCARD" title="PSA_ALG_IS_WILDCARD">PSA_ALG_IS_WILDCARD</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p><code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a wildcard algorithm encoding.</p>
+<p><code class="docutils literal"><span class="pre">0</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is a non-wildcard algorithm encoding that is suitable for an operation.</p>
+<p>This macro can return either <code class="docutils literal"><span class="pre">0</span></code> or <code class="docutils literal"><span class="pre">1</span></code> if <code class="docutils literal"><span class="pre">alg</span></code> is not a supported algorithm identifier.</p>
+<p class="rubric">Description</p>
+<p>Wildcard algorithm values can only be used to set the usage algorithm field in a policy, wildcard values cannot be used to perform an operation.</p>
+<p>See <a class="reference internal" href="../ops/sign.html#c.PSA_ALG_ANY_HASH" title="PSA_ALG_ANY_HASH"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_ANY_HASH</span></code></a> for example of how a wildcard algorithm can be used in a key policy.</p>
+</div>
+<div class="section" id="PSA_ALG_GET_HASH">
+<span id="c.PSA_ALG_GET_HASH"></span><h3><code class="docutils literal"><span class="pre">PSA_ALG_GET_HASH</span></code> (macro)</h3>
+<p>Get the hash used by a composite algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ALG_GET_HASH" title="PSA_ALG_GET_HASH">PSA_ALG_GET_HASH</a>(alg) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>An algorithm identifier (value of type <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p>The underlying hash algorithm if <code class="docutils literal"><span class="pre">alg</span></code> is a composite algorithm that uses a hash algorithm.</p>
+<p><a class="reference internal" href="#c.PSA_ALG_NONE" title="PSA_ALG_NONE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_NONE</span></code></a> if <code class="docutils literal"><span class="pre">alg</span></code> is not a composite algorithm that uses a hash.</p>
+<p class="rubric">Description</p>
+<p>The following composite algorithms require a hash algorithm:</p>
+<ul class="simple">
+<li><a class="reference internal" href="../ops/sign.html#c.PSA_ALG_ECDSA" title="PSA_ALG_ECDSA"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_ECDSA()</span></code></a></li>
+<li><a class="reference internal" href="../ops/kdf.html#c.PSA_ALG_HKDF" title="PSA_ALG_HKDF"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_HKDF()</span></code></a></li>
+<li><a class="reference internal" href="../ops/macs.html#c.PSA_ALG_HMAC" title="PSA_ALG_HMAC"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_HMAC()</span></code></a></li>
+<li><a class="reference internal" href="../ops/pke.html#c.PSA_ALG_RSA_OAEP" title="PSA_ALG_RSA_OAEP"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_RSA_OAEP()</span></code></a></li>
+<li><a class="reference internal" href="../ops/sign.html#c.PSA_ALG_IS_RSA_PKCS1V15_SIGN" title="PSA_ALG_IS_RSA_PKCS1V15_SIGN"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_IS_RSA_PKCS1V15_SIGN()</span></code></a></li>
+<li><a class="reference internal" href="../ops/sign.html#c.PSA_ALG_RSA_PSS" title="PSA_ALG_RSA_PSS"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_RSA_PSS()</span></code></a></li>
+<li><a class="reference internal" href="../ops/kdf.html#c.PSA_ALG_TLS12_PRF" title="PSA_ALG_TLS12_PRF"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_TLS12_PRF()</span></code></a></li>
+<li><a class="reference internal" href="../ops/kdf.html#c.PSA_ALG_TLS12_PSK_TO_MS" title="PSA_ALG_TLS12_PSK_TO_MS"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_TLS12_PSK_TO_MS()</span></code></a></li>
+</ul>
+</div>
+</div>
+<div class="section" id="attribute-accessors">
+<h2>Attribute accessors</h2>
+<div class="section" id="psa_set_key_algorithm">
+<span id="c.psa_set_key_algorithm"></span><h3><code class="docutils literal"><span class="pre">psa_set_key_algorithm</span></code> (function)</h3>
+<p>Declare the permitted algorithm policy for a key.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_set_key_algorithm" title="psa_set_key_algorithm">psa_set_key_algorithm</a>(<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                           <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t">psa_algorithm_t</a> alg);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to write to.</dd>
+<dt> <code class="docutils literal"><span class="pre">alg</span></code></dt>
+<dd>The permitted algorithm policy to write.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>The permitted algorithm policy of a key encodes which algorithm or algorithms are permitted to be used with this key. The following algorithm policies are supported:</p>
+<ul class="simple">
+<li><a class="reference internal" href="#c.PSA_ALG_NONE" title="PSA_ALG_NONE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_NONE</span></code></a> does not allow any cryptographic operation with the key. The key can still be used for non-cryptographic actions such as exporting, if permitted by the usage flags.</li>
+<li>An algorithm value permits this particular algorithm.</li>
+<li>An algorithm wildcard built from <a class="reference internal" href="../ops/sign.html#c.PSA_ALG_ANY_HASH" title="PSA_ALG_ANY_HASH"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_ANY_HASH</span></code></a> allows the specified signature scheme with any hash algorithm.</li>
+</ul>
+<p>This function overwrites any algorithm policy previously set in <code class="docutils literal"><span class="pre">attributes</span></code>.</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_get_key_algorithm">
+<span id="c.psa_get_key_algorithm"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_algorithm</span></code> (function)</h3>
+<p>Retrieve the algorithm policy from key attributes.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t">psa_algorithm_t</a> <a class="reference internal" href="#c.psa_get_key_algorithm" title="psa_get_key_algorithm">psa_get_key_algorithm</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The key attribute object to query.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="attributes.html#c.psa_algorithm_t" title="psa_algorithm_t"><code class="docutils literal"><span class="pre">psa_algorithm_t</span></code></a></p>
+<p>The algorithm stored in the attribute object.</p>
+<p class="rubric">Description</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+  <h3><a href="../../index.html">Table Of Contents</a></h3>
+  <ul>
+<li><a class="reference internal" href="#">Algorithms</a><ul>
+<li><a class="reference internal" href="#algorithm-categories">Algorithm categories</a><ul>
+<li><a class="reference internal" href="#PSA_ALG_NONE"><code class="docutils literal"><span class="pre">PSA_ALG_NONE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_HASH"><code class="docutils literal"><span class="pre">PSA_ALG_IS_HASH</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_MAC"><code class="docutils literal"><span class="pre">PSA_ALG_IS_MAC</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_CIPHER"><code class="docutils literal"><span class="pre">PSA_ALG_IS_CIPHER</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_AEAD"><code class="docutils literal"><span class="pre">PSA_ALG_IS_AEAD</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_SIGN"><code class="docutils literal"><span class="pre">PSA_ALG_IS_SIGN</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_ASYMMETRIC_ENCRYPTION"><code class="docutils literal"><span class="pre">PSA_ALG_IS_ASYMMETRIC_ENCRYPTION</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_KEY_AGREEMENT"><code class="docutils literal"><span class="pre">PSA_ALG_IS_KEY_AGREEMENT</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_KEY_DERIVATION"><code class="docutils literal"><span class="pre">PSA_ALG_IS_KEY_DERIVATION</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_IS_WILDCARD"><code class="docutils literal"><span class="pre">PSA_ALG_IS_WILDCARD</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ALG_GET_HASH"><code class="docutils literal"><span class="pre">PSA_ALG_GET_HASH</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#attribute-accessors">Attribute accessors</a><ul>
+<li><a class="reference internal" href="#psa_set_key_algorithm"><code class="docutils literal"><span class="pre">psa_set_key_algorithm</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_algorithm"><code class="docutils literal"><span class="pre">psa_get_key_algorithm</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+  <li><a href="index.html">Key management reference</a><ul>
+      <li>Previous: <a href="usage.html" title="previous chapter">Key policies</a></li>
+      <li>Next: <a href="management.html" title="next chapter">Key management functions</a></li>
+  </ul></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/algorithms.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/algorithms.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/html/api/keys/attributes.html b/docs/html/api/keys/attributes.html
new file mode 100644
index 0000000..cd78ebb
--- /dev/null
+++ b/docs/html/api/keys/attributes.html
@@ -0,0 +1,391 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Key attributes &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Key locations" href="locations.html" />
+    <link rel="prev" title="Key management reference" href="index.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="key-attributes">
+<span id="id1"></span><h1>Key attributes</h1>
+<div class="section" id="attribute-types">
+<h2>Attribute types</h2>
+<div class="section" id="psa_key_lifetime_t">
+<span id="c.psa_key_lifetime_t"></span><h3><code class="docutils literal"><span class="pre">psa_key_lifetime_t</span></code> (type)</h3>
+<p>Encoding of key lifetimes.</p>
+<pre class="literal-block">
+typedef uint32_t <a class="reference internal" href="#c.psa_key_lifetime_t" title="psa_key_lifetime_t">psa_key_lifetime_t</a>;
+</pre>
+<p>The lifetime of a key indicates where it is stored and which application and system actions will create and destroy it.</p>
+<p>Keys with the lifetime <a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code></a> are automatically destroyed when the application terminates or on a power reset.</p>
+<p>Keys with a lifetime other than <a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code></a> are said to be <em>persistent</em>. Persistent keys are preserved if the application or the system restarts. Persistent keys have a key identifier of type <a class="reference internal" href="#c.psa_key_id_t" title="psa_key_id_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_id_t</span></code></a>.</p>
+<p>See <em><a class="reference internal" href="locations.html#key-locations"><span class="std std-ref">Key locations</span></a></em> for a list of defined key lifetimes.</p>
+</div>
+<div class="section" id="psa_key_id_t">
+<span id="c.psa_key_id_t"></span><h3><code class="docutils literal"><span class="pre">psa_key_id_t</span></code> (type)</h3>
+<p>Key identifier.</p>
+<pre class="literal-block">
+typedef uint32_t <a class="reference internal" href="#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a>;
+</pre>
+<p>A key identifiers can be a permanent name for a persistent key, or a transient reference to volatile key. The range of identifier values is divided as follows:</p>
+<dl class="docutils">
+<dt><a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a></dt>
+<dd>Reserved as an invalid key identifier.</dd>
+<dt><a class="reference internal" href="locations.html#c.PSA_KEY_ID_USER_MIN" title="PSA_KEY_ID_USER_MIN"><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MIN</span></code></a><code class="docutils literal"> <span class="pre">-</span> </code><a class="reference internal" href="locations.html#c.PSA_KEY_ID_USER_MAX" title="PSA_KEY_ID_USER_MAX"><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MAX</span></code></a></dt>
+<dd>Applications can freely choose persistent key identifiers in this range.</dd>
+<dt><a class="reference internal" href="locations.html#c.PSA_KEY_ID_VENDOR_MIN" title="PSA_KEY_ID_VENDOR_MIN"><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MIN</span></code></a><code class="docutils literal"> <span class="pre">-</span> </code><a class="reference internal" href="locations.html#c.PSA_KEY_ID_VENDOR_MAX" title="PSA_KEY_ID_VENDOR_MAX"><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MAX</span></code></a></dt>
+<dd>Implementations can define additional persistent key identifiers in this
+range, and allocate key identifiers for volatile keys from this range.</dd>
+</dl>
+<p>Key identifiers outside these ranges are reserved for future use.</p>
+<p>See also <em><a class="reference internal" href="../../overview/functionality.html#key-ids"><span class="std std-ref">Key identifiers</span></a></em>.</p>
+</div>
+<div class="section" id="psa_key_type_t">
+<span id="c.psa_key_type_t"></span><h3><code class="docutils literal"><span class="pre">psa_key_type_t</span></code> (type)</h3>
+<p>Encoding of a key type.</p>
+<pre class="literal-block">
+typedef uint16_t <a class="reference internal" href="#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>;
+</pre>
+<p>This is a structured bitfield that identifies the category and type of key. The range of key type values is divided as follows:</p>
+<dl class="docutils">
+<dt><a class="reference internal" href="types.html#c.PSA_KEY_TYPE_NONE" title="PSA_KEY_TYPE_NONE"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_NONE</span></code></a><code class="docutils literal"> <span class="pre">==</span> <span class="pre">0</span></code></dt>
+<dd>Reserved as an invalid key type.</dd>
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x0001</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">x7fff</span></code></dt>
+<dd>Specification-defined key types.
+Key types defined by this standard always have bit 15 clear.
+Unallocated key type values in this range are reserved for future use.</dd>
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x8000</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">xffff</span></code></dt>
+<dd>Implementation-defined key types.
+Implementations that define additional key types must use an encoding with bit 15 set.
+The related support macros will be easier to write if these key encodings also respect the bitwise structure used by standard encodings.</dd>
+</dl>
+<p>See <em><a class="reference internal" href="types.html#key-types"><span class="std std-ref">Key types</span></a></em> for a complete list of key types.</p>
+</div>
+<div class="section" id="psa_key_usage_t">
+<span id="c.psa_key_usage_t"></span><h3><code class="docutils literal"><span class="pre">psa_key_usage_t</span></code> (type)</h3>
+<p>Encoding of permitted usage on a key.</p>
+<pre class="literal-block">
+typedef uint32_t <a class="reference internal" href="#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>;
+</pre>
+<p>See <em><a class="reference internal" href="usage.html#key-usage"><span class="std std-ref">Key policies</span></a></em> for a full list of key usage policies.</p>
+</div>
+<div class="section" id="psa_algorithm_t">
+<span id="c.psa_algorithm_t"></span><h3><code class="docutils literal"><span class="pre">psa_algorithm_t</span></code> (type)</h3>
+<p>Encoding of a cryptographic algorithm.</p>
+<pre class="literal-block">
+typedef uint32_t <a class="reference internal" href="#c.psa_algorithm_t" title="psa_algorithm_t">psa_algorithm_t</a>;
+</pre>
+<p>This is a structured bitfield that identifies the category and type of algorithm. The range of algorithm identifier values is divided as follows:</p>
+<dl class="docutils">
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x00000000</span></code></dt>
+<dd>Reserved as an invalid algorithm identifier.</dd>
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x00000001</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">x7fffffff</span></code></dt>
+<dd>Specification-defined algorithm identifiers.
+Algorithm identifiers defined by this standard always have bit 31 clear.
+Unallocated algorithm identifier values in this range are reserved for future use.</dd>
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x80000000</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">xffffffff</span></code></dt>
+<dd>Implementation-defined algorithm identifiers.
+Implementations that define additional algorithms must use an encoding with bit 31 set.
+The related support macros will be easier to write if these algorithm identifier encodings also respect the bitwise structure used by standard encodings.</dd>
+</dl>
+<p>For algorithms that can be applied to multiple key types, this identifier does not encode the key type. For example, for symmetric ciphers based on a block cipher, <a class="reference internal" href="#c.psa_algorithm_t" title="psa_algorithm_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_algorithm_t</span></code></a> encodes the block cipher mode and the padding mode while the block cipher itself is encoded via <a class="reference internal" href="#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>.</p>
+<p>See <em><a class="reference internal" href="algorithms.html#algorithms"><span class="std std-ref">Algorithms</span></a></em> for a full list of algorithm identifiers.</p>
+</div>
+</div>
+<div class="section" id="managing-attributes">
+<h2>Managing attributes</h2>
+<div class="section" id="psa_key_attributes_t">
+<span id="c.psa_key_attributes_t"></span><h3><code class="docutils literal"><span class="pre">psa_key_attributes_t</span></code> (type)</h3>
+<p>The type of an object containing key attributes.</p>
+<pre class="literal-block">
+typedef <em><a class="reference internal" href="../../overview/implementation.html#implementation-defined-type"><span class="std std-ref">/* implementation-defined type */</span></a></em> <a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a>;
+</pre>
+<p>This is the object that represents the metadata of a key object. Metadata that can be stored in attributes includes:</p>
+<ul class="simple">
+<li>The location of the key in storage, indicated by its key identifier and its lifetime.</li>
+<li>The key’s policy, comprising usage flags and a specification of the permitted algorithm(s).</li>
+<li>Information about the key itself: the key type and its size.</li>
+<li>Implementations can define additional attributes.</li>
+</ul>
+<p>The actual key material is not considered an attribute of a key. Key attributes do not contain information that is generally considered highly confidential.</p>
+<div class="admonition note">
+<p class="first admonition-title">Note</p>
+<p>Implementations are recommended to define the attribute object as a simple data structure, with fields corresponding to the individual key attributes. In such an implementation, each function <code class="docutils literal"><span class="pre">psa_set_key_xxx()</span></code> sets a field and the corresponding function <code class="docutils literal"><span class="pre">psa_get_key_xxx()</span></code> retrieves the value of the field.</p>
+<p class="last">An implementations can report attribute values that are equivalent to the original one, but have a different encoding. For example, an implementation can use a more compact representation for types where many bit-patterns are invalid or not supported, and store all values that it does not support as a special marker value. In such an implementation, after setting an invalid value, the corresponding get function returns an invalid value which might not be the one that was originally stored.</p>
+</div>
+<p>This is an implementation-defined type. Applications that make assumptions about the content of this object will result in in implementation-specific behavior, and are non-portable.</p>
+<p>An attribute object can contain references to auxiliary resources, for example pointers to allocated memory or indirect references to pre-calculated values. In order to free such resources, the application must call <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a>. As an exception, calling <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a> on an attribute object is optional if the object has only been modified by the following functions since it was initialized or last reset with <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a>:</p>
+<ul class="simple">
+<li><a class="reference internal" href="locations.html#c.psa_set_key_id" title="psa_set_key_id"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_id()</span></code></a></li>
+<li><a class="reference internal" href="locations.html#c.psa_set_key_lifetime" title="psa_set_key_lifetime"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_lifetime()</span></code></a></li>
+<li><a class="reference internal" href="types.html#c.psa_set_key_type" title="psa_set_key_type"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_type()</span></code></a></li>
+<li><a class="reference internal" href="types.html#c.psa_set_key_bits" title="psa_set_key_bits"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_bits()</span></code></a></li>
+<li><a class="reference internal" href="usage.html#c.psa_set_key_usage_flags" title="psa_set_key_usage_flags"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_usage_flags()</span></code></a></li>
+<li><a class="reference internal" href="algorithms.html#c.psa_set_key_algorithm" title="psa_set_key_algorithm"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_algorithm()</span></code></a></li>
+</ul>
+<p>Before calling any function on a key attribute object, the application must initialize it by any of the following means:</p>
+<ul>
+<li><p class="first">Set the object to all-bits-zero, for example:</p>
+<pre class="literal-block">
+<a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> attributes;
+memset(&amp;attributes, 0, sizeof(attributes));
+</pre>
+</li>
+<li><p class="first">Initialize the object to logical zero values by declaring the object as static or global without an explicit initializer, for example:</p>
+<pre class="literal-block">
+static <a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> attributes;
+</pre>
+</li>
+<li><p class="first">Initialize the object to the initializer <a class="reference internal" href="#c.PSA_KEY_ATTRIBUTES_INIT" title="PSA_KEY_ATTRIBUTES_INIT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ATTRIBUTES_INIT</span></code></a>, for example:</p>
+<pre class="literal-block">
+<a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> attributes = <a class="reference internal" href="#c.PSA_KEY_ATTRIBUTES_INIT" title="PSA_KEY_ATTRIBUTES_INIT">PSA_KEY_ATTRIBUTES_INIT</a>;
+</pre>
+</li>
+<li><p class="first">Assign the result of the function <a class="reference internal" href="#c.psa_key_attributes_init" title="psa_key_attributes_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_attributes_init()</span></code></a> to the object, for example:</p>
+<pre class="literal-block">
+<a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> attributes;
+attributes = <a class="reference internal" href="#c.psa_key_attributes_init" title="psa_key_attributes_init">psa_key_attributes_init</a>();
+</pre>
+</li>
+</ul>
+<p>A freshly initialized attribute object contains the following values:</p>
+<table border="1" class="docutils">
+<colgroup>
+<col width="15%" />
+<col width="85%" />
+</colgroup>
+<thead valign="bottom">
+<tr class="row-odd"><th class="head">Attribute</th>
+<th class="head">Value</th>
+</tr>
+</thead>
+<tbody valign="top">
+<tr class="row-even"><td>lifetime</td>
+<td><a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code></a>.</td>
+</tr>
+<tr class="row-odd"><td>key identifier</td>
+<td><a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a> - which is not a valid key identifier.</td>
+</tr>
+<tr class="row-even"><td>type</td>
+<td><a class="reference internal" href="types.html#c.PSA_KEY_TYPE_NONE" title="PSA_KEY_TYPE_NONE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_NONE</span></code></a> - meaning that the type is unspecified.</td>
+</tr>
+<tr class="row-odd"><td>key size</td>
+<td><code class="docutils literal"><span class="pre">0</span></code> - meaning that the size is unspecified.</td>
+</tr>
+<tr class="row-even"><td>usage flags</td>
+<td><code class="docutils literal"><span class="pre">0</span></code> - which allows no usage except exporting a public key.</td>
+</tr>
+<tr class="row-odd"><td>algorithm</td>
+<td><a class="reference internal" href="algorithms.html#c.PSA_ALG_NONE" title="PSA_ALG_NONE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_NONE</span></code></a> - which does not allow cryptographic usage, but allows exporting.</td>
+</tr>
+</tbody>
+</table>
+<p class="rubric">Usage</p>
+<p>A typical sequence to create a key is as follows:</p>
+<ol class="arabic simple">
+<li>Create and initialize an attribute object.</li>
+<li>If the key is persistent, call <a class="reference internal" href="locations.html#c.psa_set_key_id" title="psa_set_key_id"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_id()</span></code></a>. Also call <a class="reference internal" href="locations.html#c.psa_set_key_lifetime" title="psa_set_key_lifetime"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_lifetime()</span></code></a> to place the key in a non-default location.</li>
+<li>Set the key policy with <a class="reference internal" href="usage.html#c.psa_set_key_usage_flags" title="psa_set_key_usage_flags"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_usage_flags()</span></code></a> and <a class="reference internal" href="algorithms.html#c.psa_set_key_algorithm" title="psa_set_key_algorithm"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_algorithm()</span></code></a>.</li>
+<li>Set the key type with <a class="reference internal" href="types.html#c.psa_set_key_type" title="psa_set_key_type"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_type()</span></code></a>. Skip this step if copying an existing key with <a class="reference internal" href="management.html#c.psa_copy_key" title="psa_copy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_copy_key()</span></code></a>.</li>
+<li>When generating a random key with <a class="reference internal" href="management.html#c.psa_generate_key" title="psa_generate_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_generate_key()</span></code></a> or deriving a key with <a class="reference internal" href="../ops/kdf.html#c.psa_key_derivation_output_key" title="psa_key_derivation_output_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_derivation_output_key()</span></code></a>, set the desired key size with <a class="reference internal" href="types.html#c.psa_set_key_bits" title="psa_set_key_bits"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_bits()</span></code></a>.</li>
+<li>Call a key creation function: <a class="reference internal" href="management.html#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a>, <a class="reference internal" href="management.html#c.psa_generate_key" title="psa_generate_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_generate_key()</span></code></a>, <a class="reference internal" href="../ops/kdf.html#c.psa_key_derivation_output_key" title="psa_key_derivation_output_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_derivation_output_key()</span></code></a> or <a class="reference internal" href="management.html#c.psa_copy_key" title="psa_copy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_copy_key()</span></code></a>. This function reads the attribute object, creates a key with these attributes, and outputs an identifier for the newly created key.</li>
+<li>Optionally call <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a>, now that the attribute object is no longer needed. Currently this call is not required as the attributes defined in this specification do not require additional resources beyond the object itself.</li>
+</ol>
+<p>A typical sequence to query a key’s attributes is as follows:</p>
+<ol class="arabic simple">
+<li>Call <a class="reference internal" href="#c.psa_get_key_attributes" title="psa_get_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_get_key_attributes()</span></code></a>.</li>
+<li>Call <code class="docutils literal"><span class="pre">psa_get_key_xxx()</span></code> functions to retrieve the required attribute(s).</li>
+<li>Call <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a> to free any resources that can be used by the attribute object.</li>
+</ol>
+<p>Once a key has been created, it is impossible to change its attributes.</p>
+</div>
+<div class="section" id="PSA_KEY_ATTRIBUTES_INIT">
+<span id="c.PSA_KEY_ATTRIBUTES_INIT"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_ATTRIBUTES_INIT</span></code> (macro)</h3>
+<p>This macro returns a suitable initializer for a key attribute object of type <a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_attributes_t</span></code></a>.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_ATTRIBUTES_INIT" title="PSA_KEY_ATTRIBUTES_INIT">PSA_KEY_ATTRIBUTES_INIT</a> <em><a class="reference internal" href="../../overview/implementation.html#implementation-defined-value"><span class="std std-ref">/* implementation-defined value */</span></a></em>
+</pre>
+</div>
+<div class="section" id="psa_key_attributes_init">
+<span id="c.psa_key_attributes_init"></span><h3><code class="docutils literal"><span class="pre">psa_key_attributes_init</span></code> (function)</h3>
+<p>Return an initial value for a key attribute object.</p>
+<pre class="literal-block">
+<a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> <a class="reference internal" href="#c.psa_key_attributes_init" title="psa_key_attributes_init">psa_key_attributes_init</a>(void);
+</pre>
+<p class="rubric">Returns: <a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t"><code class="docutils literal"><span class="pre">psa_key_attributes_t</span></code></a></p>
+</div>
+<div class="section" id="psa_get_key_attributes">
+<span id="c.psa_get_key_attributes"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_attributes</span></code> (function)</h3>
+<p>Retrieve the attributes of a key.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_get_key_attributes" title="psa_get_key_attributes">psa_get_key_attributes</a>(<a class="reference internal" href="#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> key,
+                                    <a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>Identifier of the key to query.</dd>
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>On entry, <code class="docutils literal"><span class="pre">*attributes</span></code> must be in a valid state. On successful return, it contains the attributes of the key. On failure, it is equivalent to a freshly-initialized attribute object.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_HANDLE" title="PSA_ERROR_INVALID_HANDLE"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_HANDLE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_MEMORY" title="PSA_ERROR_INSUFFICIENT_MEMORY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_MEMORY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>This function first resets the attribute object as with <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a>. It then copies the attributes of the given key into the given attribute object.</p>
+<div class="admonition note">
+<p class="first admonition-title">Note</p>
+<p class="last">This function clears any previous content from the attribute object and therefore expects it to be in a valid state. In particular, if this function is called on a newly allocated attribute object, the attribute object  must be initialized before calling this function.</p>
+</div>
+<div class="admonition note">
+<p class="first admonition-title">Note</p>
+<p class="last">This function might allocate memory or other resources. Once this function has been called on an attribute object, <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes"><code class="xref any c c-func docutils literal"><span class="pre">psa_reset_key_attributes()</span></code></a> must be called to free these resources.</p>
+</div>
+</div>
+<div class="section" id="psa_reset_key_attributes">
+<span id="c.psa_reset_key_attributes"></span><h3><code class="docutils literal"><span class="pre">psa_reset_key_attributes</span></code> (function)</h3>
+<p>Reset a key attribute object to a freshly initialized state.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_reset_key_attributes" title="psa_reset_key_attributes">psa_reset_key_attributes</a>(<a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to reset.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>The attribute object must be initialized as described in the documentation of the type <a class="reference internal" href="#c.psa_key_attributes_t" title="psa_key_attributes_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_attributes_t</span></code></a> before calling this function. Once the object has been initialized, this function can be called at any time.</p>
+<p>This function frees any auxiliary resources that the object might contain.</p>
+</div>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+  <h3><a href="../../index.html">Table Of Contents</a></h3>
+  <ul>
+<li><a class="reference internal" href="#">Key attributes</a><ul>
+<li><a class="reference internal" href="#attribute-types">Attribute types</a><ul>
+<li><a class="reference internal" href="#psa_key_lifetime_t"><code class="docutils literal"><span class="pre">psa_key_lifetime_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#psa_key_id_t"><code class="docutils literal"><span class="pre">psa_key_id_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#psa_key_type_t"><code class="docutils literal"><span class="pre">psa_key_type_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#psa_key_usage_t"><code class="docutils literal"><span class="pre">psa_key_usage_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#psa_algorithm_t"><code class="docutils literal"><span class="pre">psa_algorithm_t</span></code> (type)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#managing-attributes">Managing attributes</a><ul>
+<li><a class="reference internal" href="#psa_key_attributes_t"><code class="docutils literal"><span class="pre">psa_key_attributes_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_ATTRIBUTES_INIT"><code class="docutils literal"><span class="pre">PSA_KEY_ATTRIBUTES_INIT</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#psa_key_attributes_init"><code class="docutils literal"><span class="pre">psa_key_attributes_init</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_attributes"><code class="docutils literal"><span class="pre">psa_get_key_attributes</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_reset_key_attributes"><code class="docutils literal"><span class="pre">psa_reset_key_attributes</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+  <li><a href="index.html">Key management reference</a><ul>
+      <li>Previous: <a href="index.html" title="previous chapter">Key management reference</a></li>
+      <li>Next: <a href="locations.html" title="next chapter">Key locations</a></li>
+  </ul></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/attributes.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/attributes.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/html/api/keys/index.html b/docs/html/api/keys/index.html
new file mode 100644
index 0000000..1ebb944
--- /dev/null
+++ b/docs/html/api/keys/index.html
@@ -0,0 +1,276 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Key management reference &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Key attributes" href="attributes.html" />
+    <link rel="prev" title="PSA Crypto library" href="../library/library.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="key-management-reference">
+<span id="key-management"></span><h1>Key management reference</h1>
+<div class="toctree-wrapper compound">
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="attributes.html">Key attributes</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="attributes.html#attribute-types">Attribute types</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_key_lifetime_t"><code class="docutils literal"><span class="pre">psa_key_lifetime_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_key_id_t"><code class="docutils literal"><span class="pre">psa_key_id_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_key_type_t"><code class="docutils literal"><span class="pre">psa_key_type_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_key_usage_t"><code class="docutils literal"><span class="pre">psa_key_usage_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_algorithm_t"><code class="docutils literal"><span class="pre">psa_algorithm_t</span></code> (type)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="attributes.html#managing-attributes">Managing attributes</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_key_attributes_t"><code class="docutils literal"><span class="pre">psa_key_attributes_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#PSA_KEY_ATTRIBUTES_INIT"><code class="docutils literal"><span class="pre">PSA_KEY_ATTRIBUTES_INIT</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_key_attributes_init"><code class="docutils literal"><span class="pre">psa_key_attributes_init</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_get_key_attributes"><code class="docutils literal"><span class="pre">psa_get_key_attributes</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="attributes.html#psa_reset_key_attributes"><code class="docutils literal"><span class="pre">psa_reset_key_attributes</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="locations.html">Key locations</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="locations.html#key-lifetimes">Key lifetimes</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_LIFETIME_VOLATILE"><code class="docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_LIFETIME_PERSISTENT"><code class="docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="locations.html#key-identifiers">Key identifiers</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_ID_NULL"><code class="docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_ID_USER_MIN"><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MIN</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_ID_USER_MAX"><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MAX</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_ID_VENDOR_MIN"><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MIN</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#PSA_KEY_ID_VENDOR_MAX"><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MAX</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="locations.html#attribute-accessors">Attribute accessors</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#psa_set_key_lifetime"><code class="docutils literal"><span class="pre">psa_set_key_lifetime</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#psa_get_key_lifetime"><code class="docutils literal"><span class="pre">psa_get_key_lifetime</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#psa_set_key_id"><code class="docutils literal"><span class="pre">psa_set_key_id</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="locations.html#psa_get_key_id"><code class="docutils literal"><span class="pre">psa_get_key_id</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="types.html">Key types</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="types.html#key-categories">Key categories</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_NONE"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_NONE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_UNSTRUCTURED"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_UNSTRUCTURED</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_ASYMMETRIC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ASYMMETRIC</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_KEY_PAIR</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="types.html#symmetric-keys">Symmetric keys</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_RAW_DATA"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RAW_DATA</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_HMAC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_HMAC</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_DERIVE"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DERIVE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_AES"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_AES</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_DES"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DES</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_CAMELLIA"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_CAMELLIA</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_ARC4"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ARC4</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_CHACHA20"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_CHACHA20</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="types.html#rsa-keys">RSA keys</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_RSA_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_RSA_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_KEY_PAIR</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_RSA"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_RSA</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="types.html#elliptic-curve-keys">Elliptic Curve keys</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="types.html#psa_ecc_family_t"><code class="docutils literal"><span class="pre">psa_ecc_family_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_ECC_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_KEY_PAIR</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_ECC_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_SECP_K1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_K1</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_SECP_R1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_R1</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_SECP_R2"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_R2</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_SECT_K1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_K1</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_SECT_R1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_R1</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_SECT_R2"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_R2</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_BRAINPOOL_P_R1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_BRAINPOOL_P_R1</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_FRP"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_FRP</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_ECC_FAMILY_MONTGOMERY"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_MONTGOMERY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_ECC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_ECC_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_KEY_PAIR</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_ECC_GET_FAMILY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_GET_FAMILY</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="types.html#diffie-hellman-keys">Diffie Hellman keys</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="types.html#psa_dh_family_t"><code class="docutils literal"><span class="pre">psa_dh_family_t</span></code> (type)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_DH_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_KEY_PAIR</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_DH_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_DH_FAMILY_RFC7919"><code class="docutils literal"><span class="pre">PSA_DH_FAMILY_RFC7919</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_DH"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_DH_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_KEY_PAIR</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_IS_DH_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_PUBLIC_KEY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#PSA_KEY_TYPE_DH_GET_FAMILY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_GET_FAMILY</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="types.html#attribute-accessors">Attribute accessors</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="types.html#psa_set_key_type"><code class="docutils literal"><span class="pre">psa_set_key_type</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#psa_get_key_type"><code class="docutils literal"><span class="pre">psa_get_key_type</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#psa_get_key_bits"><code class="docutils literal"><span class="pre">psa_get_key_bits</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="types.html#psa_set_key_bits"><code class="docutils literal"><span class="pre">psa_set_key_bits</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="usage.html">Key policies</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="usage.html#key-usage-flags">Key usage flags</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_EXPORT"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_COPY"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_CACHE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_CACHE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_ENCRYPT"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_ENCRYPT</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_DECRYPT"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_DECRYPT</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_SIGN_MESSAGE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_MESSAGE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_VERIFY_MESSAGE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_MESSAGE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_SIGN_HASH"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_HASH</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_VERIFY_HASH"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_HASH</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#PSA_KEY_USAGE_DERIVE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_DERIVE</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="usage.html#attribute-accessors">Attribute accessors</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#psa_set_key_usage_flags"><code class="docutils literal"><span class="pre">psa_set_key_usage_flags</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="usage.html#psa_get_key_usage_flags"><code class="docutils literal"><span class="pre">psa_get_key_usage_flags</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="algorithms.html">Algorithms</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="algorithms.html#algorithm-categories">Algorithm categories</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_NONE"><code class="docutils literal"><span class="pre">PSA_ALG_NONE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_HASH"><code class="docutils literal"><span class="pre">PSA_ALG_IS_HASH</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_MAC"><code class="docutils literal"><span class="pre">PSA_ALG_IS_MAC</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_CIPHER"><code class="docutils literal"><span class="pre">PSA_ALG_IS_CIPHER</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_AEAD"><code class="docutils literal"><span class="pre">PSA_ALG_IS_AEAD</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_SIGN"><code class="docutils literal"><span class="pre">PSA_ALG_IS_SIGN</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_ASYMMETRIC_ENCRYPTION"><code class="docutils literal"><span class="pre">PSA_ALG_IS_ASYMMETRIC_ENCRYPTION</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_KEY_AGREEMENT"><code class="docutils literal"><span class="pre">PSA_ALG_IS_KEY_AGREEMENT</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_KEY_DERIVATION"><code class="docutils literal"><span class="pre">PSA_ALG_IS_KEY_DERIVATION</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_IS_WILDCARD"><code class="docutils literal"><span class="pre">PSA_ALG_IS_WILDCARD</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#PSA_ALG_GET_HASH"><code class="docutils literal"><span class="pre">PSA_ALG_GET_HASH</span></code> (macro)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="algorithms.html#attribute-accessors">Attribute accessors</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#psa_set_key_algorithm"><code class="docutils literal"><span class="pre">psa_set_key_algorithm</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="algorithms.html#psa_get_key_algorithm"><code class="docutils literal"><span class="pre">psa_get_key_algorithm</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="management.html">Key management functions</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="management.html#key-creation">Key creation</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_import_key"><code class="docutils literal"><span class="pre">psa_import_key</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_generate_key"><code class="docutils literal"><span class="pre">psa_generate_key</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_copy_key"><code class="docutils literal"><span class="pre">psa_copy_key</span></code> (function)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="management.html#key-destruction">Key destruction</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_destroy_key"><code class="docutils literal"><span class="pre">psa_destroy_key</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_purge_key"><code class="docutils literal"><span class="pre">psa_purge_key</span></code> (function)</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="management.html#key-export">Key export</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_export_key"><code class="docutils literal"><span class="pre">psa_export_key</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#psa_export_public_key"><code class="docutils literal"><span class="pre">psa_export_public_key</span></code> (function)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#PSA_EXPORT_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#PSA_EXPORT_KEY_PAIR_MAX_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_PAIR_MAX_SIZE</span></code> (macro)</a></li>
+<li class="toctree-l3"><a class="reference internal" href="management.html#PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code> (macro)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper"><div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+      <li>Previous: <a href="../library/library.html" title="previous chapter">PSA Crypto library</a></li>
+      <li>Next: <a href="attributes.html" title="next chapter">Key attributes</a></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/index.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/index.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/html/api/keys/locations.html b/docs/html/api/keys/locations.html
new file mode 100644
index 0000000..3a9d745
--- /dev/null
+++ b/docs/html/api/keys/locations.html
@@ -0,0 +1,289 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Key locations &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Key types" href="types.html" />
+    <link rel="prev" title="Key attributes" href="attributes.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="key-locations">
+<span id="id1"></span><h1>Key locations</h1>
+<div class="section" id="key-lifetimes">
+<h2>Key lifetimes</h2>
+<div class="section" id="PSA_KEY_LIFETIME_VOLATILE">
+<span id="c.PSA_KEY_LIFETIME_VOLATILE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code> (macro)</h3>
+<p>A lifetime value that indicates a volatile key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE">PSA_KEY_LIFETIME_VOLATILE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_lifetime_t" title="psa_key_lifetime_t">psa_key_lifetime_t</a>)0x00000000)
+</pre>
+<p>A volatile key only exists as long as the identifier to it is not destroyed.</p>
+<p>The key material is guaranteed to be erased on a power reset.</p>
+</div>
+<div class="section" id="PSA_KEY_LIFETIME_PERSISTENT">
+<span id="c.PSA_KEY_LIFETIME_PERSISTENT"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code> (macro)</h3>
+<p>The default storage area for persistent keys.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_LIFETIME_PERSISTENT" title="PSA_KEY_LIFETIME_PERSISTENT">PSA_KEY_LIFETIME_PERSISTENT</a> ((<a class="reference internal" href="attributes.html#c.psa_key_lifetime_t" title="psa_key_lifetime_t">psa_key_lifetime_t</a>)0x00000001)
+</pre>
+<p>A persistent key remains in storage until it is explicitly destroyed or until the corresponding storage area is wiped. This specification does not define any mechanism to wipe a storage area. Implementations are permitted to provide their own mechanism, for example, to perform a factory reset, to prepare for device refurbishment, or to uninstall an application.</p>
+<p>This lifetime value is the default storage area for the calling application. Implementations can offer other storage areas designated by other lifetime values as implementation-specific extensions.</p>
+</div>
+</div>
+<div class="section" id="key-identifiers">
+<span id="id2"></span><h2>Key identifiers</h2>
+<div class="section" id="PSA_KEY_ID_NULL">
+<span id="c.PSA_KEY_ID_NULL"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code> (macro)</h3>
+<p>The null key identifier.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL">PSA_KEY_ID_NULL</a> ((<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a>)0)
+</pre>
+<p>The null key identifier is always invalid, except when used without in a call to <a class="reference internal" href="management.html#c.psa_destroy_key" title="psa_destroy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_destroy_key()</span></code></a> which will return <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_SUCCESS</span></code></a>.</p>
+</div>
+<div class="section" id="PSA_KEY_ID_USER_MIN">
+<span id="c.PSA_KEY_ID_USER_MIN"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MIN</span></code> (macro)</h3>
+<p>The minimum value for a key identifier chosen by the application.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_ID_USER_MIN" title="PSA_KEY_ID_USER_MIN">PSA_KEY_ID_USER_MIN</a> ((<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a>)0x00000001)
+</pre>
+</div>
+<div class="section" id="PSA_KEY_ID_USER_MAX">
+<span id="c.PSA_KEY_ID_USER_MAX"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MAX</span></code> (macro)</h3>
+<p>The maximum value for a key identifier chosen by the application.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_ID_USER_MAX" title="PSA_KEY_ID_USER_MAX">PSA_KEY_ID_USER_MAX</a> ((<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a>)0x3fffffff)
+</pre>
+</div>
+<div class="section" id="PSA_KEY_ID_VENDOR_MIN">
+<span id="c.PSA_KEY_ID_VENDOR_MIN"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MIN</span></code> (macro)</h3>
+<p>The minimum value for a key identifier chosen by the implementation.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_ID_VENDOR_MIN" title="PSA_KEY_ID_VENDOR_MIN">PSA_KEY_ID_VENDOR_MIN</a> ((<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a>)0x40000000)
+</pre>
+</div>
+<div class="section" id="PSA_KEY_ID_VENDOR_MAX">
+<span id="c.PSA_KEY_ID_VENDOR_MAX"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MAX</span></code> (macro)</h3>
+<p>The maximum value for a key identifier chosen by the implementation.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_ID_VENDOR_MAX" title="PSA_KEY_ID_VENDOR_MAX">PSA_KEY_ID_VENDOR_MAX</a> ((<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a>)0x7fffffff)
+</pre>
+</div>
+</div>
+<div class="section" id="attribute-accessors">
+<h2>Attribute accessors</h2>
+<div class="section" id="psa_set_key_lifetime">
+<span id="c.psa_set_key_lifetime"></span><h3><code class="docutils literal"><span class="pre">psa_set_key_lifetime</span></code> (function)</h3>
+<p>Set the location of a persistent key.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_set_key_lifetime" title="psa_set_key_lifetime">psa_set_key_lifetime</a>(<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                          <a class="reference internal" href="attributes.html#c.psa_key_lifetime_t" title="psa_key_lifetime_t">psa_key_lifetime_t</a> lifetime);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to write to.</dd>
+<dt> <code class="docutils literal"><span class="pre">lifetime</span></code></dt>
+<dd>The lifetime for the key. If this is <a class="reference internal" href="#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code></a>, the key will be volatile, and the key identifier attribute is reset to <a class="reference internal" href="#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a>.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>To make a key persistent, give it a persistent key identifier by using <a class="reference internal" href="#c.psa_set_key_id" title="psa_set_key_id"><code class="xref any c c-func docutils literal"><span class="pre">psa_set_key_id()</span></code></a>. By default, a key that has a persistent identifier is stored in the default storage area identifier by <a class="reference internal" href="#c.PSA_KEY_LIFETIME_PERSISTENT" title="PSA_KEY_LIFETIME_PERSISTENT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code></a>. Call this function to choose a storage area, or to explicitly declare the key as volatile.</p>
+<p>This function does not access storage, it merely stores the given value in the attribute object. The persistent key will be written to storage when the attribute object is passed to a key creation function such as <a class="reference internal" href="management.html#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a>, <a class="reference internal" href="management.html#c.psa_generate_key" title="psa_generate_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_generate_key()</span></code></a>, <a class="reference internal" href="../ops/kdf.html#c.psa_key_derivation_output_key" title="psa_key_derivation_output_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_derivation_output_key()</span></code></a> or <a class="reference internal" href="management.html#c.psa_copy_key" title="psa_copy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_copy_key()</span></code></a>.</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_get_key_lifetime">
+<span id="c.psa_get_key_lifetime"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_lifetime</span></code> (function)</h3>
+<p>Retrieve the lifetime from key attributes.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_key_lifetime_t" title="psa_key_lifetime_t">psa_key_lifetime_t</a> <a class="reference internal" href="#c.psa_get_key_lifetime" title="psa_get_key_lifetime">psa_get_key_lifetime</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The key attribute object to query.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="attributes.html#c.psa_key_lifetime_t" title="psa_key_lifetime_t"><code class="docutils literal"><span class="pre">psa_key_lifetime_t</span></code></a></p>
+<p>The lifetime value stored in the attribute object.</p>
+<p class="rubric">Description</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_set_key_id">
+<span id="c.psa_set_key_id"></span><h3><code class="docutils literal"><span class="pre">psa_set_key_id</span></code> (function)</h3>
+<p>Declare a key as persistent and set its key identifier.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_set_key_id" title="psa_set_key_id">psa_set_key_id</a>(<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                    <a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> id);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to write to.</dd>
+<dt> <code class="docutils literal"><span class="pre">id</span></code></dt>
+<dd>The persistent identifier for the key.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>If the attribute object currently declares the key as volatile, which is the default lifetime of an attribute object, this function sets the lifetime attribute to <a class="reference internal" href="#c.PSA_KEY_LIFETIME_PERSISTENT" title="PSA_KEY_LIFETIME_PERSISTENT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code></a>.</p>
+<p>This function does not access storage, it merely stores the given value in the attribute object. The persistent key will be written to storage when the attribute object is passed to a key creation function such as <a class="reference internal" href="management.html#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a>, <a class="reference internal" href="management.html#c.psa_generate_key" title="psa_generate_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_generate_key()</span></code></a>, <a class="reference internal" href="../ops/kdf.html#c.psa_key_derivation_output_key" title="psa_key_derivation_output_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_derivation_output_key()</span></code></a> or <a class="reference internal" href="management.html#c.psa_copy_key" title="psa_copy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_copy_key()</span></code></a>.</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_get_key_id">
+<span id="c.psa_get_key_id"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_id</span></code> (function)</h3>
+<p>Retrieve the key identifier from key attributes.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> <a class="reference internal" href="#c.psa_get_key_id" title="psa_get_key_id">psa_get_key_id</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The key attribute object to query.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t"><code class="docutils literal"><span class="pre">psa_key_id_t</span></code></a></p>
+<p>The persistent identifier stored in the attribute object. This value is unspecified if the attribute object declares the key as volatile.</p>
+<p class="rubric">Description</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+  <h3><a href="../../index.html">Table Of Contents</a></h3>
+  <ul>
+<li><a class="reference internal" href="#">Key locations</a><ul>
+<li><a class="reference internal" href="#key-lifetimes">Key lifetimes</a><ul>
+<li><a class="reference internal" href="#PSA_KEY_LIFETIME_VOLATILE"><code class="docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_LIFETIME_PERSISTENT"><code class="docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#key-identifiers">Key identifiers</a><ul>
+<li><a class="reference internal" href="#PSA_KEY_ID_NULL"><code class="docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_ID_USER_MIN"><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MIN</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_ID_USER_MAX"><code class="docutils literal"><span class="pre">PSA_KEY_ID_USER_MAX</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_ID_VENDOR_MIN"><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MIN</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_ID_VENDOR_MAX"><code class="docutils literal"><span class="pre">PSA_KEY_ID_VENDOR_MAX</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#attribute-accessors">Attribute accessors</a><ul>
+<li><a class="reference internal" href="#psa_set_key_lifetime"><code class="docutils literal"><span class="pre">psa_set_key_lifetime</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_lifetime"><code class="docutils literal"><span class="pre">psa_get_key_lifetime</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_set_key_id"><code class="docutils literal"><span class="pre">psa_set_key_id</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_id"><code class="docutils literal"><span class="pre">psa_get_key_id</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+  <li><a href="index.html">Key management reference</a><ul>
+      <li>Previous: <a href="attributes.html" title="previous chapter">Key attributes</a></li>
+      <li>Next: <a href="types.html" title="next chapter">Key types</a></li>
+  </ul></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/locations.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/locations.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/html/api/keys/management.html b/docs/html/api/keys/management.html
new file mode 100644
index 0000000..234fa72
--- /dev/null
+++ b/docs/html/api/keys/management.html
@@ -0,0 +1,670 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Key management functions &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Cryptographic operation reference" href="../ops/index.html" />
+    <link rel="prev" title="Algorithms" href="algorithms.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="key-management-functions">
+<h1>Key management functions</h1>
+<div class="section" id="key-creation">
+<span id="id1"></span><h2>Key creation</h2>
+<div class="section" id="psa_import_key">
+<span id="c.psa_import_key"></span><h3><code class="docutils literal"><span class="pre">psa_import_key</span></code> (function)</h3>
+<p>Import a key in binary format.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_import_key" title="psa_import_key">psa_import_key</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                            const uint8_t * data,
+                            size_t data_length,
+                            <a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> * key);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attributes for the new key. The key size is always determined from the <code class="docutils literal"><span class="pre">data</span></code> buffer. If the key size in <code class="docutils literal"><span class="pre">attributes</span></code> is nonzero, it must be equal to the size from <code class="docutils literal"><span class="pre">data</span></code>.</dd>
+<dt> <code class="docutils literal"><span class="pre">data</span></code></dt>
+<dd>Buffer containing the key data.
+The content of this buffer is interpreted according to the type declared in <code class="docutils literal"><span class="pre">attributes</span></code>.
+All implementations must support at least the format described in the documentation of <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> or <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a> for the chosen type.
+Implementations can support other formats, but be conservative in interpreting the key data: it is recommended that implementations reject content if it might be erroneous, for example, if it is the wrong type or is truncated.</dd>
+<dt> <code class="docutils literal"><span class="pre">data_length</span></code></dt>
+<dd>Size of the <code class="docutils literal"><span class="pre">data</span></code> buffer in bytes.</dd>
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>On success, an identifier for the newly created key. <a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a> on failure.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd>Success. If the key is persistent, the key material and the key’s metadata have been saved to persistent storage.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_ALREADY_EXISTS" title="PSA_ERROR_ALREADY_EXISTS"><code class="docutils literal"><span class="pre">PSA_ERROR_ALREADY_EXISTS</span></code></a></dt>
+<dd>This is an attempt to create a persistent key, and there is already a persistent key with the given identifier.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_SUPPORTED" title="PSA_ERROR_NOT_SUPPORTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_SUPPORTED</span></code></a></dt>
+<dd>The key type or key size is not supported, either by the implementation in general or in this particular persistent location.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd>The key attributes, as a whole, are invalid.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd>The key data is not correctly formatted.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd>The size in <code class="docutils literal"><span class="pre">attributes</span></code> is nonzero and does not match the size of the key data.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_MEMORY" title="PSA_ERROR_INSUFFICIENT_MEMORY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_MEMORY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_STORAGE" title="PSA_ERROR_INSUFFICIENT_STORAGE"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_STORAGE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_HARDWARE_FAILURE" title="PSA_ERROR_HARDWARE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_HARDWARE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>This function supports any output from <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a>. Refer to the documentation of <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a> for the format of public keys and to the documentation of <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> for the format for other key types.</p>
+<p>The key data determines the key size. The attributes can optionally specify a key size; in this case it must match the size determined from the key data. A key size of <code class="docutils literal"><span class="pre">0</span></code> in <code class="docutils literal"><span class="pre">attributes</span></code> indicates that the key size is solely determined by the key data.</p>
+<p>Implementations must reject an attempt to import a key of size <code class="docutils literal"><span class="pre">0</span></code>.</p>
+<p>This specification defines a single format for each key type. Implementations can optionally support other formats in addition to the standard format. It is recommended that implementations that support other formats ensure that the formats are clearly unambiguous, to minimize the risk that an invalid input is accidentally interpreted according to a different format.</p>
+</div>
+<div class="section" id="psa_generate_key">
+<span id="c.psa_generate_key"></span><h3><code class="docutils literal"><span class="pre">psa_generate_key</span></code> (function)</h3>
+<p>Generate a key or key pair.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_generate_key" title="psa_generate_key">psa_generate_key</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                              <a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> * key);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attributes for the new key.</dd>
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>On success, an identifier for the newly created key. <a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a> on failure.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd>Success. If the key is persistent, the key material and the key’s metadata have been saved to persistent storage.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_ALREADY_EXISTS" title="PSA_ERROR_ALREADY_EXISTS"><code class="docutils literal"><span class="pre">PSA_ERROR_ALREADY_EXISTS</span></code></a></dt>
+<dd>This is an attempt to create a persistent key, and there is already a persistent key with the given identifier.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_SUPPORTED" title="PSA_ERROR_NOT_SUPPORTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_SUPPORTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_MEMORY" title="PSA_ERROR_INSUFFICIENT_MEMORY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_MEMORY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_ENTROPY" title="PSA_ERROR_INSUFFICIENT_ENTROPY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_ENTROPY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_HARDWARE_FAILURE" title="PSA_ERROR_HARDWARE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_HARDWARE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_STORAGE" title="PSA_ERROR_INSUFFICIENT_STORAGE"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_STORAGE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>The key is generated randomly. Its location, usage policy, type and size are taken from <code class="docutils literal"><span class="pre">attributes</span></code>.</p>
+<p>Implementations must reject an attempt to generate a key of size <code class="docutils literal"><span class="pre">0</span></code>.</p>
+<p>The following type-specific considerations apply:</p>
+<ul class="simple">
+<li>For RSA keys (<a class="reference internal" href="types.html#c.PSA_KEY_TYPE_RSA_KEY_PAIR" title="PSA_KEY_TYPE_RSA_KEY_PAIR"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_KEY_PAIR</span></code></a>), the public exponent is 65537. The modulus is a product of two probabilistic primes between 2^{n-1} and 2^n where n is the bit size specified in the attributes.</li>
+</ul>
+</div>
+<div class="section" id="psa_copy_key">
+<span id="c.psa_copy_key"></span><h3><code class="docutils literal"><span class="pre">psa_copy_key</span></code> (function)</h3>
+<p>Make a copy of a key.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_copy_key" title="psa_copy_key">psa_copy_key</a>(<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> source_key,
+                          const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                          <a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> * target_key);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">source_key</span></code></dt>
+<dd>The key to copy.
+It must allow the usage <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a>.
+If a private or secret key is being copied outside of a secure element it must also allow <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a>.</dd>
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd><p class="first">The attributes for the new key. They are used as follows:</p>
+<ul class="last simple">
+<li>The key type and size can be <code class="docutils literal"><span class="pre">0</span></code>. If either is nonzero, it must match the corresponding attribute of the source key.</li>
+<li>The key location (the lifetime and, for persistent keys, the key identifier) is used directly.</li>
+<li>The policy constraints (usage flags and algorithm policy) are combined from the source key and <code class="docutils literal"><span class="pre">attributes</span></code> so that both sets of restrictions apply, as described in the documentation of this function.</li>
+</ul>
+</dd>
+<dt> <code class="docutils literal"><span class="pre">target_key</span></code></dt>
+<dd>On success, an identifier for the newly created key. <a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a> on failure.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_HANDLE" title="PSA_ERROR_INVALID_HANDLE"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_HANDLE</span></code></a></dt>
+<dd><code class="docutils literal"><span class="pre">source_key</span></code> is invalid.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_ALREADY_EXISTS" title="PSA_ERROR_ALREADY_EXISTS"><code class="docutils literal"><span class="pre">PSA_ERROR_ALREADY_EXISTS</span></code></a></dt>
+<dd>This is an attempt to create a persistent key, and there is already a persistent key with the given identifier.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd>The lifetime or identifier in <code class="docutils literal"><span class="pre">attributes</span></code> are invalid.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd>The policy constraints on <code class="docutils literal"><span class="pre">source_key</span></code> and specified in <code class="docutils literal"><span class="pre">attributes</span></code> are incompatible.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd><code class="docutils literal"><span class="pre">attributes</span></code> specifies a key type or key size which does not match the attributes of <code class="docutils literal"><span class="pre">source</span> <span class="pre">key</span></code>.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_PERMITTED" title="PSA_ERROR_NOT_PERMITTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_PERMITTED</span></code></a></dt>
+<dd><code class="docutils literal"><span class="pre">source_key</span></code> does not have the <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a> usage flag.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_PERMITTED" title="PSA_ERROR_NOT_PERMITTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_PERMITTED</span></code></a></dt>
+<dd><code class="docutils literal"><span class="pre">source_key</span></code> does not have the <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a> usage flag and its lifetime does not allow copying it to the target’s lifetime.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_MEMORY" title="PSA_ERROR_INSUFFICIENT_MEMORY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_MEMORY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_STORAGE" title="PSA_ERROR_INSUFFICIENT_STORAGE"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_STORAGE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_HARDWARE_FAILURE" title="PSA_ERROR_HARDWARE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_HARDWARE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>Copy key material from one location to another.</p>
+<p>This function is primarily useful to copy a key from one location to another, as it populates a key using the material from another key which can have a different lifetime.</p>
+<p>This function can be used to share a key with a different party, subject to implementation-defined restrictions on key sharing.</p>
+<p>The policy on the source key must have the usage flag <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a> set. This flag is sufficient to permit the copy if the key has the lifetime <a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code></a> or <a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_PERSISTENT" title="PSA_KEY_LIFETIME_PERSISTENT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code></a>. Some secure elements do not provide a way to copy a key without making it extractable from the secure element. If a key is located in such a secure element, then the key must have both usage flags <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a> and <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a> in order to make a copy of the key outside the secure element.</p>
+<p>The resulting key can only be used in a way that conforms to both the policy of the original key and the policy specified in the <code class="docutils literal"><span class="pre">attributes</span></code> parameter:</p>
+<ul class="simple">
+<li>The usage flags on the resulting key are the bitwise-and of the usage flags on the source policy and the usage flags in <code class="docutils literal"><span class="pre">attributes</span></code>.</li>
+<li>If both allow the same algorithm or wildcard-based algorithm policy, the resulting key has the same algorithm policy.</li>
+<li>If either of the policies allows an algorithm and the other policy allows a wildcard-based algorithm policy that includes this algorithm, the resulting key allows the same algorithm.</li>
+<li>If the policies do not allow any algorithm in common, this function fails with the status <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a>.</li>
+</ul>
+<p>The effect of this function on implementation-defined attributes is implementation-defined.</p>
+</div>
+</div>
+<div class="section" id="key-destruction">
+<span id="id2"></span><h2>Key destruction</h2>
+<div class="section" id="psa_destroy_key">
+<span id="c.psa_destroy_key"></span><h3><code class="docutils literal"><span class="pre">psa_destroy_key</span></code> (function)</h3>
+<p>Destroy a key.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_destroy_key" title="psa_destroy_key">psa_destroy_key</a>(<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> key);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>Identifier of the key to erase.
+If this is <a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a>, do nothing and return <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_SUCCESS</span></code></a>.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd><code class="docutils literal"><span class="pre">key</span></code> was a valid key identifier and the key material that it referred to has been erased.
+Alternatively, <code class="docutils literal"><span class="pre">key</span></code> is <a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a>.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_PERMITTED" title="PSA_ERROR_NOT_PERMITTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_PERMITTED</span></code></a></dt>
+<dd>The key cannot be erased because it is read-only, either due to a policy or due to physical restrictions.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_HANDLE" title="PSA_ERROR_INVALID_HANDLE"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_HANDLE</span></code></a></dt>
+<dd><code class="docutils literal"><span class="pre">key</span></code> is not a valid handle nor <a class="reference internal" href="locations.html#c.PSA_KEY_ID_NULL" title="PSA_KEY_ID_NULL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_ID_NULL</span></code></a>.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd>There was an failure in communication with the cryptoprocessor. The key material might still be present in the cryptoprocessor.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd>The storage operation failed. Implementations must make a best effort to erase key material even in this situation, however, it might be impossible to guarantee that the key material is not recoverable in such cases.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd>The storage is corrupted. Implementations must make a best effort to erase key material even in this situation, however, it might be impossible to guarantee that the key material is not recoverable in such cases.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd>An unexpected condition which is not a storage corruption or a communication failure occurred. The cryptoprocessor might have been compromised.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>This function destroys a key from both volatile memory and, if applicable, non-volatile storage. Implementations must make a best effort to ensure that that the key material cannot be recovered.</p>
+<p>This function also erases any metadata such as policies and frees resources associated with the key.</p>
+<p>Destroying the key makes the key identifier invalid, and the key identifier must not be used again by the application.</p>
+<p>If a key is currently in use in a multi-part operation, then destroying the key will cause the multi-part operation to fail.</p>
+</div>
+<div class="section" id="psa_purge_key">
+<span id="c.psa_purge_key"></span><h3><code class="docutils literal"><span class="pre">psa_purge_key</span></code> (function)</h3>
+<p>Remove non-essential copies of key material from memory.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_purge_key" title="psa_purge_key">psa_purge_key</a>(<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> key);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>Identifier of the key to purge.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd>The key material will have been removed from memory if it is not currently required.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_HANDLE" title="PSA_ERROR_INVALID_HANDLE"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_HANDLE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>An implementation is permitted to make additional copies of key material
+For keys that have been created with the <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_CACHE" title="PSA_KEY_USAGE_CACHE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_CACHE</span></code></a> policy, an implementation is permitted to make additional copies of the key material that are not in storage and not for the purpose of ongoing operations.</p>
+<p>This function will remove these extra copies of the key material from memory.</p>
+<p>This function is not required to remove key material from memory in any of the following situations:</p>
+<ul class="simple">
+<li>The key is currently in use in a cryptographic operation.</li>
+<li>The key is volatile.</li>
+</ul>
+<p>See also <em><a class="reference internal" href="../../overview/implementation.html#key-material"><span class="std std-ref">Managing key material</span></a></em>.</p>
+</div>
+</div>
+<div class="section" id="key-export">
+<span id="id3"></span><h2>Key export</h2>
+<div class="section" id="psa_export_key">
+<span id="c.psa_export_key"></span><h3><code class="docutils literal"><span class="pre">psa_export_key</span></code> (function)</h3>
+<p>Export a key in binary format.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_export_key" title="psa_export_key">psa_export_key</a>(<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> key,
+                            uint8_t * data,
+                            size_t data_size,
+                            size_t * data_length);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>Identifier of the key to export.
+It must allow the usage <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a>, unless it is a public key.</dd>
+<dt> <code class="docutils literal"><span class="pre">data</span></code></dt>
+<dd>Buffer where the key data is to be written.</dd>
+<dt> <code class="docutils literal"><span class="pre">data_size</span></code></dt>
+<dd><p class="first">Size of the <code class="docutils literal"><span class="pre">data</span></code> buffer in bytes.
+This must be appropriate for the key:</p>
+<ul class="last simple">
+<li>The required output size is <a class="reference internal" href="#c.PSA_EXPORT_KEY_OUTPUT_SIZE" title="PSA_EXPORT_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE</span></code></a><code class="docutils literal"><span class="pre">(</span></code><code class="docutils literal"><span class="pre">type</span></code><code class="docutils literal"><span class="pre">,</span> </code><code class="docutils literal"><span class="pre">bits</span></code><code class="docutils literal"><span class="pre">)</span></code> where <code class="docutils literal"><span class="pre">type</span></code> is the key type and <code class="docutils literal"><span class="pre">bits</span></code> is the key size in bits.</li>
+<li>For asymmetric keys, <a class="reference internal" href="#c.PSA_EXPORT_KEY_PAIR_MAX_SIZE" title="PSA_EXPORT_KEY_PAIR_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_KEY_PAIR_MAX_SIZE</span></code></a> evaluates to the maximum output size of any supported public key or key pair.</li>
+</ul>
+</dd>
+<dt> <code class="docutils literal"><span class="pre">data_length</span></code></dt>
+<dd>On success, the number of bytes that make up the key data.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_HANDLE" title="PSA_ERROR_INVALID_HANDLE"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_HANDLE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_PERMITTED" title="PSA_ERROR_NOT_PERMITTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_PERMITTED</span></code></a></dt>
+<dd>The key does not have the <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a> flag.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_SUPPORTED" title="PSA_ERROR_NOT_SUPPORTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_SUPPORTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BUFFER_TOO_SMALL" title="PSA_ERROR_BUFFER_TOO_SMALL"><code class="docutils literal"><span class="pre">PSA_ERROR_BUFFER_TOO_SMALL</span></code></a></dt>
+<dd>The size of the <code class="docutils literal"><span class="pre">data</span></code> buffer is too small.
+<a class="reference internal" href="#c.PSA_EXPORT_KEY_OUTPUT_SIZE" title="PSA_EXPORT_KEY_OUTPUT_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE()</span></code></a> or <a class="reference internal" href="#c.PSA_EXPORT_KEY_PAIR_MAX_SIZE" title="PSA_EXPORT_KEY_PAIR_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_KEY_PAIR_MAX_SIZE</span></code></a> can be used to determine the required buffer size.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_HARDWARE_FAILURE" title="PSA_ERROR_HARDWARE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_HARDWARE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_MEMORY" title="PSA_ERROR_INSUFFICIENT_MEMORY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_MEMORY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>The output of this function can be passed to <a class="reference internal" href="#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a> to create an equivalent object.</p>
+<p>If the implementation of <a class="reference internal" href="#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a> supports other formats beyond the format specified here, the output from <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> must use the representation specified here, not the original representation.</p>
+<p>For standard key types, the output format is as follows:</p>
+<ul class="simple">
+<li>For symmetric keys, including MAC keys, the format is the raw bytes of the key.</li>
+<li>For DES, the key data consists of 8 bytes. The parity bits must be correct.</li>
+<li>For Triple-DES, the format is the concatenation of the two or three DES keys.</li>
+<li>For RSA key pairs, with key type <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_RSA_KEY_PAIR" title="PSA_KEY_TYPE_RSA_KEY_PAIR"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_KEY_PAIR</span></code></a>, the format is the non-encrypted DER encoding of the representation defined by PKCS#1 in <a class="reference external" href="https://tools.ietf.org/html/rfc8017.html">RFC 8017</a> as <code class="docutils literal"><span class="pre">RSAPrivateKey</span></code>, version <code class="docutils literal"><span class="pre">0</span></code>.</li>
+<li>For elliptic curve key pairs, with key types for which <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_IS_ECC_KEY_PAIR" title="PSA_KEY_TYPE_IS_ECC_KEY_PAIR"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_KEY_PAIR()</span></code></a> is true, the format is a representation of the private value.<ul>
+<li>For Weierstrass curve families <code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_XX</span></code>, <code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_XX</span></code>, <a class="reference internal" href="types.html#c.PSA_ECC_FAMILY_FRP" title="PSA_ECC_FAMILY_FRP"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ECC_FAMILY_FRP</span></code></a> and <a class="reference internal" href="types.html#c.PSA_ECC_FAMILY_BRAINPOOL_P_R1" title="PSA_ECC_FAMILY_BRAINPOOL_P_R1"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ECC_FAMILY_BRAINPOOL_P_R1</span></code></a>, the content of the <code class="docutils literal"><span class="pre">privateKey</span></code> field of the <code class="docutils literal"><span class="pre">ECPrivateKey</span></code> format defined by <a class="reference external" href="https://tools.ietf.org/html/rfc5915.html">RFC 5915</a>. This is a <code class="docutils literal"><span class="pre">ceiling(m/8)</span></code>-byte string in big-endian order where <code class="docutils literal"><span class="pre">m</span></code> is the key size in bits.</li>
+<li>For curve family <a class="reference internal" href="types.html#c.PSA_ECC_FAMILY_MONTGOMERY" title="PSA_ECC_FAMILY_MONTGOMERY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ECC_FAMILY_MONTGOMERY</span></code></a>, the scalar value of the ‘private key’ in little-endian order as defined by <a class="reference external" href="https://tools.ietf.org/html/rfc7748.html#section-6">RFC 7748 §6</a>. This is a <code class="docutils literal"><span class="pre">ceiling(m/8)</span></code>-byte string where <code class="docutils literal"><span class="pre">m</span></code> is the key size in bits. This is 32 bytes for Curve25519, and 56 bytes for Curve448.</li>
+</ul>
+</li>
+<li>For Diffie-Hellman key exchange key pairs, with key types for which <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_IS_DH_KEY_PAIR" title="PSA_KEY_TYPE_IS_DH_KEY_PAIR"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_KEY_PAIR()</span></code></a> is true, the format is the representation of the private key <code class="docutils literal"><span class="pre">x</span></code> as a big-endian byte string. The length of the byte string is the private key size in bytes, and leading zeroes are not stripped.</li>
+<li>For public keys, with key types for which <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_IS_PUBLIC_KEY" title="PSA_KEY_TYPE_IS_PUBLIC_KEY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_IS_PUBLIC_KEY()</span></code></a> is true, the format is the same as for <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a>.</li>
+</ul>
+<p>The policy on the key must have the usage flag <a class="reference internal" href="usage.html#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a> set.</p>
+</div>
+<div class="section" id="psa_export_public_key">
+<span id="c.psa_export_public_key"></span><h3><code class="docutils literal"><span class="pre">psa_export_public_key</span></code> (function)</h3>
+<p>Export a public key or the public part of a key pair in binary format.</p>
+<pre class="literal-block">
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key">psa_export_public_key</a>(<a class="reference internal" href="attributes.html#c.psa_key_id_t" title="psa_key_id_t">psa_key_id_t</a> key,
+                                   uint8_t * data,
+                                   size_t data_size,
+                                   size_t * data_length);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key</span></code></dt>
+<dd>Identifier of the key to export.</dd>
+<dt> <code class="docutils literal"><span class="pre">data</span></code></dt>
+<dd>Buffer where the key data is to be written.</dd>
+<dt> <code class="docutils literal"><span class="pre">data_size</span></code></dt>
+<dd><p class="first">Size of the <code class="docutils literal"><span class="pre">data</span></code> buffer in bytes.
+This must be appropriate for the key:</p>
+<ul class="last simple">
+<li>The required output size is <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE" title="PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE</span></code></a><code class="docutils literal"><span class="pre">(</span></code><code class="docutils literal"><span class="pre">type</span></code><code class="docutils literal"><span class="pre">,</span> </code><code class="docutils literal"><span class="pre">bits</span></code><code class="docutils literal"><span class="pre">)</span></code> where <code class="docutils literal"><span class="pre">type</span></code> is the key type and <code class="docutils literal"><span class="pre">bits</span></code> is the key size in bits.</li>
+<li><a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_MAX_SIZE" title="PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code></a> evaluates to the maximum output size of any supported public key or public part of a key pair.</li>
+</ul>
+</dd>
+<dt> <code class="docutils literal"><span class="pre">data_length</span></code></dt>
+<dd>On success, the number of bytes that make up the key data.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t"><code class="docutils literal"><span class="pre">psa_status_t</span></code></a></p>
+<dl class="docutils">
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_HANDLE" title="PSA_ERROR_INVALID_HANDLE"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_HANDLE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INVALID_ARGUMENT" title="PSA_ERROR_INVALID_ARGUMENT"><code class="docutils literal"><span class="pre">PSA_ERROR_INVALID_ARGUMENT</span></code></a></dt>
+<dd>The key is neither a public key nor a key pair.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_NOT_SUPPORTED" title="PSA_ERROR_NOT_SUPPORTED"><code class="docutils literal"><span class="pre">PSA_ERROR_NOT_SUPPORTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BUFFER_TOO_SMALL" title="PSA_ERROR_BUFFER_TOO_SMALL"><code class="docutils literal"><span class="pre">PSA_ERROR_BUFFER_TOO_SMALL</span></code></a></dt>
+<dd>The size of the <code class="docutils literal"><span class="pre">data</span></code> buffer is too small.
+<a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE" title="PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE()</span></code></a> or <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_MAX_SIZE" title="PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code></a> can be used to determine the required buffer size.</dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_COMMUNICATION_FAILURE" title="PSA_ERROR_COMMUNICATION_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_COMMUNICATION_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_HARDWARE_FAILURE" title="PSA_ERROR_HARDWARE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_HARDWARE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_CORRUPTION_DETECTED" title="PSA_ERROR_CORRUPTION_DETECTED"><code class="docutils literal"><span class="pre">PSA_ERROR_CORRUPTION_DETECTED</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_STORAGE_FAILURE" title="PSA_ERROR_STORAGE_FAILURE"><code class="docutils literal"><span class="pre">PSA_ERROR_STORAGE_FAILURE</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_CORRUPT" title="PSA_ERROR_DATA_CORRUPT"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_CORRUPT</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_DATA_INVALID" title="PSA_ERROR_DATA_INVALID"><code class="docutils literal"><span class="pre">PSA_ERROR_DATA_INVALID</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_INSUFFICIENT_MEMORY" title="PSA_ERROR_INSUFFICIENT_MEMORY"><code class="docutils literal"><span class="pre">PSA_ERROR_INSUFFICIENT_MEMORY</span></code></a></dt>
+<dd></dd>
+<dt> <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a></dt>
+<dd>The library has not been previously initialized by <a class="reference internal" href="../library/library.html#c.psa_crypto_init" title="psa_crypto_init"><code class="xref any c c-func docutils literal"><span class="pre">psa_crypto_init()</span></code></a>. It is implementation-dependent whether a failure to initialize results in this error code.</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>The output of this function can be passed to <a class="reference internal" href="#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a> to create an object that is equivalent to the public key.</p>
+<p>If the implementation of <a class="reference internal" href="#c.psa_import_key" title="psa_import_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_import_key()</span></code></a> supports other formats beyond the format specified here, the output from <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a> must use the representation specified here, not the original representation.</p>
+<p>For standard key types, the output format is as follows:</p>
+<ul class="simple">
+<li>For RSA public keys, with key type <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_RSA_PUBLIC_KEY" title="PSA_KEY_TYPE_RSA_PUBLIC_KEY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_PUBLIC_KEY</span></code></a>, the DER encoding of the representation defined by <a class="reference external" href="https://tools.ietf.org/html/rfc3279.html#section-2.3.1">RFC 3279 §2.3.1</a> as <code class="docutils literal"><span class="pre">RSAPublicKey</span></code>.</li>
+<li>For elliptic curve key pairs, with key types for which <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY" title="PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY()</span></code></a> is true, the format depends on the key family:<ul>
+<li>For Weierstrass curve families <code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_XX</span></code>, <code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_XX</span></code>, <a class="reference internal" href="types.html#c.PSA_ECC_FAMILY_FRP" title="PSA_ECC_FAMILY_FRP"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ECC_FAMILY_FRP</span></code></a> and <a class="reference internal" href="types.html#c.PSA_ECC_FAMILY_BRAINPOOL_P_R1" title="PSA_ECC_FAMILY_BRAINPOOL_P_R1"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ECC_FAMILY_BRAINPOOL_P_R1</span></code></a>, the uncompressed representation defined by <em>Standards for Efficient Cryptography</em>, <a class="reference external" href="https://www.secg.org/sec1-v2.pdf"><em>SEC 1: Elliptic Curve Cryptography</em></a> §2.3.3 as the content of an <code class="docutils literal"><span class="pre">ECPoint</span></code>. If <code class="docutils literal"><span class="pre">m</span></code> is the bit size associated with the curve, i.e. the bit size of <code class="docutils literal"><span class="pre">q</span></code> for a curve over <code class="docutils literal"><span class="pre">F_q</span></code>. The representation consists of:<ul>
+<li>The byte <code class="docutils literal"><span class="pre">0x04</span></code>;</li>
+<li><code class="docutils literal"><span class="pre">x_P</span></code> as a <code class="docutils literal"><span class="pre">ceiling(m/8)</span></code>-byte string, big-endian;</li>
+<li><code class="docutils literal"><span class="pre">y_P</span></code> as a <code class="docutils literal"><span class="pre">ceiling(m/8)</span></code>-byte string, big-endian.</li>
+</ul>
+</li>
+<li>For curve family <a class="reference internal" href="types.html#c.PSA_ECC_FAMILY_MONTGOMERY" title="PSA_ECC_FAMILY_MONTGOMERY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ECC_FAMILY_MONTGOMERY</span></code></a>, the scalar value of the ‘public key’ in little-endian order as defined by <a class="reference external" href="https://tools.ietf.org/html/rfc7748.html#section-6">RFC 7748 §6</a>. This is a <code class="docutils literal"><span class="pre">ceiling(m/8)</span></code>-byte string where <code class="docutils literal"><span class="pre">m</span></code> is the key size in bits.<ul>
+<li>This is 32 bytes for Curve25519, computed as <code class="docutils literal"><span class="pre">X25519(private_key,</span> <span class="pre">9)</span></code>.</li>
+<li>This is 56 bytes for Curve448, computed as <code class="docutils literal"><span class="pre">X448(private_key,</span> <span class="pre">5)</span></code>.</li>
+</ul>
+</li>
+</ul>
+</li>
+<li>For Diffie-Hellman key exchange public keys, with key types for which <a class="reference internal" href="types.html#c.PSA_KEY_TYPE_IS_DH_PUBLIC_KEY" title="PSA_KEY_TYPE_IS_DH_PUBLIC_KEY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_PUBLIC_KEY</span></code></a> is true, the format is the representation of the public key <code class="docutils literal"><span class="pre">y</span> <span class="pre">=</span> <span class="pre">g^x</span> <span class="pre">mod</span> <span class="pre">p</span></code> as a big-endian byte string. The length of the byte string is the length of the base prime <code class="docutils literal"><span class="pre">p</span></code> in bytes.</li>
+</ul>
+<p>Exporting a public key object or the public part of a key pair is always permitted, regardless of the key’s usage flags.</p>
+</div>
+<div class="section" id="PSA_EXPORT_KEY_OUTPUT_SIZE">
+<span id="c.PSA_EXPORT_KEY_OUTPUT_SIZE"></span><h3><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE</span></code> (macro)</h3>
+<p>Sufficient output buffer size for <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a>.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_EXPORT_KEY_OUTPUT_SIZE" title="PSA_EXPORT_KEY_OUTPUT_SIZE">PSA_EXPORT_KEY_OUTPUT_SIZE</a>(key_type, key_bits) \
+    <em><a class="reference internal" href="../../overview/implementation.html#implementation-defined-value"><span class="std std-ref">/* implementation-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key_type</span></code></dt>
+<dd>A supported key type.</dd>
+<dt> <code class="docutils literal"><span class="pre">key_bits</span></code></dt>
+<dd>The size of the key in bits.</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p>If the parameters are valid and supported, return a buffer size in bytes that guarantees that <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> or <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a> will not fail with <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BUFFER_TOO_SMALL" title="PSA_ERROR_BUFFER_TOO_SMALL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ERROR_BUFFER_TOO_SMALL</span></code></a>. If the parameters are a valid combination that is not supported by the implementation, this macro must return either a sensible size or <code class="docutils literal"><span class="pre">0</span></code>. If the parameters are not valid, the return value is unspecified.</p>
+<p class="rubric">Description</p>
+<p>This macro returns a compile-time constant if its arguments are compile-time constants.</p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">This function can evaluate its arguments multiple times or zero times. Providing arguments that have side effects will result in implementation-specific behavior, and is non-portable.</p>
+</div>
+<p>The following code illustrates how to allocate enough memory to export a key by querying the key type and size at runtime.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> attributes = <a class="reference internal" href="attributes.html#c.PSA_KEY_ATTRIBUTES_INIT" title="PSA_KEY_ATTRIBUTES_INIT">PSA_KEY_ATTRIBUTES_INIT</a>;
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> status;
+status = <a class="reference internal" href="attributes.html#c.psa_get_key_attributes" title="psa_get_key_attributes">psa_get_key_attributes</a>(key, &amp;attributes);
+if (status != <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS">PSA_SUCCESS</a>)
+    handle_error(...);
+<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a> key_type = <a class="reference internal" href="types.html#c.psa_get_key_type" title="psa_get_key_type">psa_get_key_type</a>(&amp;attributes);
+size_t key_bits = <a class="reference internal" href="types.html#c.psa_get_key_bits" title="psa_get_key_bits">psa_get_key_bits</a>(&amp;attributes);
+size_t buffer_size = <a class="reference internal" href="#c.PSA_EXPORT_KEY_OUTPUT_SIZE" title="PSA_EXPORT_KEY_OUTPUT_SIZE">PSA_EXPORT_KEY_OUTPUT_SIZE</a>(key_type, key_bits);
+<a class="reference internal" href="attributes.html#c.psa_reset_key_attributes" title="psa_reset_key_attributes">psa_reset_key_attributes</a>(&amp;attributes);
+uint8_t *buffer = malloc(buffer_size);
+if (buffer == NULL)
+    handle_error(...);
+size_t buffer_length;
+status = <a class="reference internal" href="#c.psa_export_key" title="psa_export_key">psa_export_key</a>(key, buffer, buffer_size, &amp;buffer_length);
+if (status != <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS">PSA_SUCCESS</a>)
+    handle_error(...);
+</pre>
+<p>See also <a class="reference internal" href="#c.PSA_EXPORT_KEY_PAIR_MAX_SIZE" title="PSA_EXPORT_KEY_PAIR_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_KEY_PAIR_MAX_SIZE</span></code></a> and <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_MAX_SIZE" title="PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code></a>.</p>
+</div>
+<div class="section" id="PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE">
+<span id="c.PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE"></span><h3><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE</span></code> (macro)</h3>
+<p>Sufficient output buffer size for <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a>.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE" title="PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE</a>(key_type, key_bits) \
+    <em><a class="reference internal" href="../../overview/implementation.html#implementation-defined-value"><span class="std std-ref">/* implementation-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">key_type</span></code></dt>
+<dd>A public key or key pair key type.</dd>
+<dt> <code class="docutils literal"><span class="pre">key_bits</span></code></dt>
+<dd>The size of the key in bits.</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p>If the parameters are valid and supported, return a buffer size in bytes that guarantees that <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a> will not fail with <a class="reference internal" href="../library/status.html#c.PSA_ERROR_BUFFER_TOO_SMALL" title="PSA_ERROR_BUFFER_TOO_SMALL"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ERROR_BUFFER_TOO_SMALL</span></code></a>. If the parameters are a valid combination that is not supported by the implementation, this macro must return either a sensible size or <code class="docutils literal"><span class="pre">0</span></code>. If the parameters are not valid, the return value is unspecified.</p>
+<p>If the parameters are valid and supported, it is recommended that this macro returns the same result as <a class="reference internal" href="#c.PSA_EXPORT_KEY_OUTPUT_SIZE" title="PSA_EXPORT_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE</span></code></a><code class="docutils literal"><span class="pre">(</span></code><a class="reference internal" href="types.html#c.PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR" title="PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR</span></code></a><code class="docutils literal"><span class="pre">(</span></code><code class="docutils literal"><span class="pre">key_type</span></code><code class="docutils literal"><span class="pre">),</span> </code><code class="docutils literal"><span class="pre">key_bits</span></code><code class="docutils literal"><span class="pre">)</span></code>.</p>
+<p class="rubric">Description</p>
+<p>This macro returns a compile-time constant if its arguments are compile-time constants.</p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">This function can evaluate its arguments multiple times or zero times. Providing arguments that have side effects will result in implementation-specific behavior, and is non-portable.</p>
+</div>
+<p>The following code illustrates how to allocate enough memory to export a public key by querying the key type and size at runtime.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> attributes = <a class="reference internal" href="attributes.html#c.PSA_KEY_ATTRIBUTES_INIT" title="PSA_KEY_ATTRIBUTES_INIT">PSA_KEY_ATTRIBUTES_INIT</a>;
+<a class="reference internal" href="../library/status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> status;
+status = <a class="reference internal" href="attributes.html#c.psa_get_key_attributes" title="psa_get_key_attributes">psa_get_key_attributes</a>(key, &amp;attributes);
+if (status != <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS">PSA_SUCCESS</a>)
+    handle_error(...);
+<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a> key_type = <a class="reference internal" href="types.html#c.psa_get_key_type" title="psa_get_key_type">psa_get_key_type</a>(&amp;attributes);
+size_t key_bits = <a class="reference internal" href="types.html#c.psa_get_key_bits" title="psa_get_key_bits">psa_get_key_bits</a>(&amp;attributes);
+size_t buffer_size = <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE" title="PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE</a>(key_type, key_bits);
+<a class="reference internal" href="attributes.html#c.psa_reset_key_attributes" title="psa_reset_key_attributes">psa_reset_key_attributes</a>(&amp;attributes);
+uint8_t *buffer = malloc(buffer_size);
+if (buffer == NULL)
+    handle_error(...);
+size_t buffer_length;
+status = <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key">psa_export_public_key</a>(key, buffer, buffer_size, &amp;buffer_length);
+if (status != <a class="reference internal" href="../library/status.html#c.PSA_SUCCESS" title="PSA_SUCCESS">PSA_SUCCESS</a>)
+    handle_error(...);
+</pre>
+<p>See also <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_MAX_SIZE" title="PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code></a>.</p>
+</div>
+<div class="section" id="PSA_EXPORT_KEY_PAIR_MAX_SIZE">
+<span id="c.PSA_EXPORT_KEY_PAIR_MAX_SIZE"></span><h3><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_PAIR_MAX_SIZE</span></code> (macro)</h3>
+<p>Sufficient buffer size for exporting any asymmetric key pair.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_EXPORT_KEY_PAIR_MAX_SIZE" title="PSA_EXPORT_KEY_PAIR_MAX_SIZE">PSA_EXPORT_KEY_PAIR_MAX_SIZE</a> <em><a class="reference internal" href="../../overview/implementation.html#implementation-defined-value"><span class="std std-ref">/* implementation-defined value */</span></a></em>
+</pre>
+<p>This macro must expand to a compile-time constant integer.
+This value must be a sufficient buffer size when calling <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> to export any asymmetric key pair that is supported by the implementation, regardless of the exact key type and key size.</p>
+<p>See also <a class="reference internal" href="#c.PSA_EXPORT_KEY_OUTPUT_SIZE" title="PSA_EXPORT_KEY_OUTPUT_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE()</span></code></a>.</p>
+</div>
+<div class="section" id="PSA_EXPORT_PUBLIC_KEY_MAX_SIZE">
+<span id="c.PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"></span><h3><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code> (macro)</h3>
+<p>Sufficient buffer size for exporting any asymmetric public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_MAX_SIZE" title="PSA_EXPORT_PUBLIC_KEY_MAX_SIZE">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</a> <em><a class="reference internal" href="../../overview/implementation.html#implementation-defined-value"><span class="std std-ref">/* implementation-defined value */</span></a></em>
+</pre>
+<p>This macro must expand to a compile-time constant integer.
+This value must be a sufficient buffer size when calling <a class="reference internal" href="#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> or <a class="reference internal" href="#c.psa_export_public_key" title="psa_export_public_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_public_key()</span></code></a> to export any asymmetric public key that is supported by the implementation, regardless of the exact key type and key size.</p>
+<p>See also <a class="reference internal" href="#c.PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE" title="PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE()</span></code></a>.</p>
+</div>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+  <h3><a href="../../index.html">Table Of Contents</a></h3>
+  <ul>
+<li><a class="reference internal" href="#">Key management functions</a><ul>
+<li><a class="reference internal" href="#key-creation">Key creation</a><ul>
+<li><a class="reference internal" href="#psa_import_key"><code class="docutils literal"><span class="pre">psa_import_key</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_generate_key"><code class="docutils literal"><span class="pre">psa_generate_key</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_copy_key"><code class="docutils literal"><span class="pre">psa_copy_key</span></code> (function)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#key-destruction">Key destruction</a><ul>
+<li><a class="reference internal" href="#psa_destroy_key"><code class="docutils literal"><span class="pre">psa_destroy_key</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_purge_key"><code class="docutils literal"><span class="pre">psa_purge_key</span></code> (function)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#key-export">Key export</a><ul>
+<li><a class="reference internal" href="#psa_export_key"><code class="docutils literal"><span class="pre">psa_export_key</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_export_public_key"><code class="docutils literal"><span class="pre">psa_export_public_key</span></code> (function)</a></li>
+<li><a class="reference internal" href="#PSA_EXPORT_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_OUTPUT_SIZE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_EXPORT_KEY_PAIR_MAX_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_KEY_PAIR_MAX_SIZE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_EXPORT_PUBLIC_KEY_MAX_SIZE"><code class="docutils literal"><span class="pre">PSA_EXPORT_PUBLIC_KEY_MAX_SIZE</span></code> (macro)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+  <li><a href="index.html">Key management reference</a><ul>
+      <li>Previous: <a href="algorithms.html" title="previous chapter">Algorithms</a></li>
+      <li>Next: <a href="../ops/index.html" title="next chapter">Cryptographic operation reference</a></li>
+  </ul></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/management.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/management.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/html/api/keys/types.html b/docs/html/api/keys/types.html
new file mode 100644
index 0000000..ff01b00
--- /dev/null
+++ b/docs/html/api/keys/types.html
@@ -0,0 +1,833 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Key types &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Key policies" href="usage.html" />
+    <link rel="prev" title="Key locations" href="locations.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="key-types">
+<span id="id1"></span><h1>Key types</h1>
+<div class="section" id="key-categories">
+<h2>Key categories</h2>
+<div class="section" id="PSA_KEY_TYPE_NONE">
+<span id="c.PSA_KEY_TYPE_NONE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_NONE</span></code> (macro)</h3>
+<p>An invalid key type value.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_NONE" title="PSA_KEY_TYPE_NONE">PSA_KEY_TYPE_NONE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x0000)
+</pre>
+<p>Zero is not the encoding of any key type.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_UNSTRUCTURED">
+<span id="c.PSA_KEY_TYPE_IS_UNSTRUCTURED"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_UNSTRUCTURED</span></code> (macro)</h3>
+<p>Whether a key type is an unstructured array of bytes.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_UNSTRUCTURED" title="PSA_KEY_TYPE_IS_UNSTRUCTURED">PSA_KEY_TYPE_IS_UNSTRUCTURED</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>This encompasses both symmetric keys and non-key data.</p>
+<p>See <em><a class="reference internal" href="#symmetric-keys"><span class="std std-ref">Symmetric keys</span></a></em> for a list of symmetric key types.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_ASYMMETRIC">
+<span id="c.PSA_KEY_TYPE_IS_ASYMMETRIC"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ASYMMETRIC</span></code> (macro)</h3>
+<p>Whether a key type is asymmetric: either a key pair or a public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_ASYMMETRIC" title="PSA_KEY_TYPE_IS_ASYMMETRIC">PSA_KEY_TYPE_IS_ASYMMETRIC</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+<p class="rubric">Description</p>
+<p>See <em><a class="reference internal" href="#asymmetric-keys"><span class="std std-ref">RSA keys</span></a></em> for a list of asymmetric key types.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_IS_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_PUBLIC_KEY</span></code> (macro)</h3>
+<p>Whether a key type is the public part of a key pair.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_PUBLIC_KEY" title="PSA_KEY_TYPE_IS_PUBLIC_KEY">PSA_KEY_TYPE_IS_PUBLIC_KEY</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_IS_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_KEY_PAIR</span></code> (macro)</h3>
+<p>Whether a key type is a key pair containing a private part and a public part.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_KEY_PAIR" title="PSA_KEY_TYPE_IS_KEY_PAIR">PSA_KEY_TYPE_IS_KEY_PAIR</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+</div>
+<div class="section" id="symmetric-keys">
+<span id="id2"></span><h2>Symmetric keys</h2>
+<div class="section" id="PSA_KEY_TYPE_RAW_DATA">
+<span id="c.PSA_KEY_TYPE_RAW_DATA"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RAW_DATA</span></code> (macro)</h3>
+<p>Raw data.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_RAW_DATA" title="PSA_KEY_TYPE_RAW_DATA">PSA_KEY_TYPE_RAW_DATA</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x1001)
+</pre>
+<p>A “key” of this type cannot be used for any cryptographic operation. Applications can use this type to store arbitrary data in the keystore.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_HMAC">
+<span id="c.PSA_KEY_TYPE_HMAC"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_HMAC</span></code> (macro)</h3>
+<p>HMAC key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_HMAC" title="PSA_KEY_TYPE_HMAC">PSA_KEY_TYPE_HMAC</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x1100)
+</pre>
+<p>The key policy determines which underlying hash algorithm the key can be used for.</p>
+<p>HMAC keys typically have the same size as the underlying hash. This size can be calculated with <a class="reference internal" href="../ops/hashes.html#c.PSA_HASH_LENGTH" title="PSA_HASH_LENGTH"><code class="docutils literal"><span class="pre">PSA_HASH_LENGTH</span></code></a><code class="docutils literal"><span class="pre">(</span></code><code class="docutils literal"><span class="pre">alg</span></code><code class="docutils literal"><span class="pre">)</span></code> where <code class="docutils literal"><span class="pre">alg</span></code> is the HMAC algorithm or the underlying hash algorithm.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_DERIVE">
+<span id="c.PSA_KEY_TYPE_DERIVE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DERIVE</span></code> (macro)</h3>
+<p>A secret for key derivation.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_DERIVE" title="PSA_KEY_TYPE_DERIVE">PSA_KEY_TYPE_DERIVE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x1200)
+</pre>
+<p>The key policy determines which key derivation algorithm the key can be used for.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_AES">
+<span id="c.PSA_KEY_TYPE_AES"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_AES</span></code> (macro)</h3>
+<p>Key for a cipher, AEAD or MAC algorithm based on the AES block cipher.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_AES" title="PSA_KEY_TYPE_AES">PSA_KEY_TYPE_AES</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x2400)
+</pre>
+<p>The size of the key can be 16 bytes (AES-128), 24 bytes (AES-192) or 32 bytes (AES-256).</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_DES">
+<span id="c.PSA_KEY_TYPE_DES"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DES</span></code> (macro)</h3>
+<p>Key for a cipher or MAC algorithm based on DES or 3DES (Triple-DES).</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_DES" title="PSA_KEY_TYPE_DES">PSA_KEY_TYPE_DES</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x2301)
+</pre>
+<p>The size of the key can be 8 bytes (single DES), 16 bytes (2-key 3DES) or 24 bytes (3-key 3DES).</p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p>Single DES and 2-key 3DES are weak and strongly deprecated and are only recommended for decrypting legacy data.</p>
+<p class="last">3-key 3DES is weak and deprecated and is only recommended for use in legacy protocols.</p>
+</div>
+</div>
+<div class="section" id="PSA_KEY_TYPE_CAMELLIA">
+<span id="c.PSA_KEY_TYPE_CAMELLIA"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_CAMELLIA</span></code> (macro)</h3>
+<p>Key for a cipher, AEAD or MAC algorithm based on the Camellia block cipher.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_CAMELLIA" title="PSA_KEY_TYPE_CAMELLIA">PSA_KEY_TYPE_CAMELLIA</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x2403)
+</pre>
+</div>
+<div class="section" id="PSA_KEY_TYPE_ARC4">
+<span id="c.PSA_KEY_TYPE_ARC4"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ARC4</span></code> (macro)</h3>
+<p>Key for the RC4 stream cipher.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_ARC4" title="PSA_KEY_TYPE_ARC4">PSA_KEY_TYPE_ARC4</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x2002)
+</pre>
+<p>Use algorithm <a class="reference internal" href="../ops/ciphers.html#c.PSA_ALG_STREAM_CIPHER" title="PSA_ALG_STREAM_CIPHER"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_STREAM_CIPHER</span></code></a> to use this key with the ARC4 cipher.</p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">The RC4 cipher is weak and deprecated and is only recommended for use in legacy protocols.</p>
+</div>
+<p>The ARC4 cipher does not use an initialization vector (IV). When using a multi-part cipher operation with the <a class="reference internal" href="../ops/ciphers.html#c.PSA_ALG_STREAM_CIPHER" title="PSA_ALG_STREAM_CIPHER"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_STREAM_CIPHER</span></code></a> algorithm and an ARC4 key, <a class="reference internal" href="../ops/ciphers.html#c.psa_cipher_generate_iv" title="psa_cipher_generate_iv"><code class="xref any c c-func docutils literal"><span class="pre">psa_cipher_generate_iv()</span></code></a> and <a class="reference internal" href="../ops/ciphers.html#c.psa_cipher_set_iv" title="psa_cipher_set_iv"><code class="xref any c c-func docutils literal"><span class="pre">psa_cipher_set_iv()</span></code></a> must not be called.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_CHACHA20">
+<span id="c.PSA_KEY_TYPE_CHACHA20"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_CHACHA20</span></code> (macro)</h3>
+<p>Key for the ChaCha20 stream cipher or the Chacha20-Poly1305 AEAD algorithm.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_CHACHA20" title="PSA_KEY_TYPE_CHACHA20">PSA_KEY_TYPE_CHACHA20</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x2004)
+</pre>
+<p>ChaCha20 and the ChaCha20_Poly1305 construction are defined in <a class="reference external" href="https://tools.ietf.org/html/rfc7539.html">RFC 7539</a>.</p>
+<p>Variants of these algorithms are defined by the length of the nonce:</p>
+<ul class="simple">
+<li>Implementations must support a 12-byte nonce, as defined in <a class="reference external" href="https://tools.ietf.org/html/rfc7539.html">RFC 7539</a>.</li>
+<li>Implementations can optionally support an 8-byte nonce, the original variant.</li>
+<li>It is recommended that implementations do not support other sizes of nonce.</li>
+</ul>
+<p>Use algorithm <a class="reference internal" href="../ops/ciphers.html#c.PSA_ALG_STREAM_CIPHER" title="PSA_ALG_STREAM_CIPHER"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_STREAM_CIPHER</span></code></a> to use this key with the ChaCha20 cipher for unauthenticated encryption.</p>
+</div>
+</div>
+<div class="section" id="rsa-keys">
+<span id="asymmetric-keys"></span><h2>RSA keys</h2>
+<div class="section" id="PSA_KEY_TYPE_RSA_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_RSA_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_PUBLIC_KEY</span></code> (macro)</h3>
+<p>RSA public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_RSA_PUBLIC_KEY" title="PSA_KEY_TYPE_RSA_PUBLIC_KEY">PSA_KEY_TYPE_RSA_PUBLIC_KEY</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x4001)
+</pre>
+</div>
+<div class="section" id="PSA_KEY_TYPE_RSA_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_RSA_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_KEY_PAIR</span></code> (macro)</h3>
+<p>RSA key pair: both the private and public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_RSA_KEY_PAIR" title="PSA_KEY_TYPE_RSA_KEY_PAIR">PSA_KEY_TYPE_RSA_KEY_PAIR</a> ((<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a>)0x7001)
+</pre>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_RSA">
+<span id="c.PSA_KEY_TYPE_IS_RSA"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_RSA</span></code> (macro)</h3>
+<p>Whether a key type is an RSA key. This includes both key pairs and public keys.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_RSA" title="PSA_KEY_TYPE_IS_RSA">PSA_KEY_TYPE_IS_RSA</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+</div>
+<div class="section" id="elliptic-curve-keys">
+<h2>Elliptic Curve keys</h2>
+<div class="section" id="psa_ecc_family_t">
+<span id="c.psa_ecc_family_t"></span><h3><code class="docutils literal"><span class="pre">psa_ecc_family_t</span></code> (type)</h3>
+<p>The type of PSA elliptic curve family identifiers.</p>
+<pre class="literal-block">
+typedef uint8_t <a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>;
+</pre>
+<p>The curve identifier is required to create an ECC key using the <a class="reference internal" href="#c.PSA_KEY_TYPE_ECC_KEY_PAIR" title="PSA_KEY_TYPE_ECC_KEY_PAIR"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_KEY_PAIR()</span></code></a> or <a class="reference internal" href="#c.PSA_KEY_TYPE_ECC_PUBLIC_KEY" title="PSA_KEY_TYPE_ECC_PUBLIC_KEY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_PUBLIC_KEY()</span></code></a> macros.</p>
+<p>The specific ECC curve within a family is identified by the <code class="docutils literal"><span class="pre">key_bits</span></code> attribute of the key.</p>
+<p>The range of Elliptic curve family identifier values is divided as follows:</p>
+<dl class="docutils">
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x00</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">x7f</span></code></dt>
+<dd>ECC family identifiers defined by this standard.
+Unallocated values in this range are reserved for future use.</dd>
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x80</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">xff</span></code></dt>
+<dd>Implementations that define additional families must use an encoding in this range.</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_ECC_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_ECC_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_KEY_PAIR</span></code> (macro)</h3>
+<p>Elliptic curve key pair: both the private and public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_ECC_KEY_PAIR" title="PSA_KEY_TYPE_ECC_KEY_PAIR">PSA_KEY_TYPE_ECC_KEY_PAIR</a>(curve) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">curve</span></code></dt>
+<dd>A value of type <a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_ecc_family_t</span></code></a> that identifies the ECC curve family to be used.</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_ECC_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_ECC_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_PUBLIC_KEY</span></code> (macro)</h3>
+<p>Elliptic curve public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_ECC_PUBLIC_KEY" title="PSA_KEY_TYPE_ECC_PUBLIC_KEY">PSA_KEY_TYPE_ECC_PUBLIC_KEY</a>(curve) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">curve</span></code></dt>
+<dd>A value of type <a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_ecc_family_t</span></code></a> that identifies the ECC curve family to be used.</dd>
+</dl>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_SECP_K1">
+<span id="c.PSA_ECC_FAMILY_SECP_K1"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_K1</span></code> (macro)</h3>
+<p>SEC Koblitz curves over prime fields.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_SECP_K1" title="PSA_ECC_FAMILY_SECP_K1">PSA_ECC_FAMILY_SECP_K1</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x17)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>secp192k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">192</span></code></li>
+<li>secp224k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">225</span></code></li>
+<li>secp256k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">256</span></code></li>
+</ul>
+<p>They are defined in <em>Standards for Efficient Cryptography</em>, <a class="reference external" href="https://www.secg.org/sec2-v2.pdf"><em>SEC 2: Recommended Elliptic Curve Domain Parameters</em></a>.</p>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_SECP_R1">
+<span id="c.PSA_ECC_FAMILY_SECP_R1"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_R1</span></code> (macro)</h3>
+<p>SEC random curves over prime fields.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_SECP_R1" title="PSA_ECC_FAMILY_SECP_R1">PSA_ECC_FAMILY_SECP_R1</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x12)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>secp192r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">192</span></code></li>
+<li>secp224r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">224</span></code></li>
+<li>secp256r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">256</span></code></li>
+<li>secp384r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">384</span></code></li>
+<li>secp521r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">512</span></code></li>
+</ul>
+<p>They are defined in <em>Standards for Efficient Cryptography</em>, <a class="reference external" href="https://www.secg.org/sec2-v2.pdf"><em>SEC 2: Recommended Elliptic Curve Domain Parameters</em></a></p>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_SECP_R2">
+<span id="c.PSA_ECC_FAMILY_SECP_R2"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_R2</span></code> (macro)</h3>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">This family of curves is weak and deprecated.</p>
+</div>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_SECP_R2" title="PSA_ECC_FAMILY_SECP_R2">PSA_ECC_FAMILY_SECP_R2</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x1b)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>secp160r2 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">160</span></code> <em>(Deprecated)</em></li>
+</ul>
+<p>It is defined in the superseded <a class="reference external" href="https://www.secg.org/SEC2-Ver-1.0.pdf"><em>SEC 2: Recommended Elliptic Curve Domain Parameters, Version 1.0</em></a>.</p>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_SECT_K1">
+<span id="c.PSA_ECC_FAMILY_SECT_K1"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_K1</span></code> (macro)</h3>
+<p>SEC Koblitz curves over binary fields.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_SECT_K1" title="PSA_ECC_FAMILY_SECT_K1">PSA_ECC_FAMILY_SECT_K1</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x27)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>sect163k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">163</span></code> <em>(Deprecated)</em></li>
+<li>sect233k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">233</span></code></li>
+<li>sect239k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">239</span></code></li>
+<li>sect283k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">283</span></code></li>
+<li>sect409k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">409</span></code></li>
+<li>sect571k1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">571</span></code></li>
+</ul>
+<p>They are defined in <em>Standards for Efficient Cryptography</em>, <a class="reference external" href="https://www.secg.org/sec2-v2.pdf"><em>SEC 2: Recommended Elliptic Curve Domain Parameters</em></a></p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">The 163-bit curve sect163k1 is weak and deprecated and is only recommended for use in legacy protocols.</p>
+</div>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_SECT_R1">
+<span id="c.PSA_ECC_FAMILY_SECT_R1"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_R1</span></code> (macro)</h3>
+<p>SEC random curves over binary fields.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_SECT_R1" title="PSA_ECC_FAMILY_SECT_R1">PSA_ECC_FAMILY_SECT_R1</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x22)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>sect163r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">163</span></code> <em>(Deprecated)</em></li>
+<li>sect233r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">233</span></code></li>
+<li>sect283r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">283</span></code></li>
+<li>sect409r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">409</span></code></li>
+<li>sect571r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">571</span></code></li>
+</ul>
+<p>They are defined in <em>Standards for Efficient Cryptography</em>, <a class="reference external" href="https://www.secg.org/sec2-v2.pdf"><em>SEC 2: Recommended Elliptic Curve Domain Parameters</em></a></p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">The 163-bit curve sect163r1 is weak and deprecated and is only recommended for use in legacy protocols.</p>
+</div>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_SECT_R2">
+<span id="c.PSA_ECC_FAMILY_SECT_R2"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_R2</span></code> (macro)</h3>
+<p>SEC additional random curves over binary fields.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_SECT_R2" title="PSA_ECC_FAMILY_SECT_R2">PSA_ECC_FAMILY_SECT_R2</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x2b)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>sect163r2 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">163</span></code> <em>(Deprecated)</em></li>
+</ul>
+<p>It is defined in <em>Standards for Efficient Cryptography</em>, <a class="reference external" href="https://www.secg.org/sec2-v2.pdf"><em>SEC 2: Recommended Elliptic Curve Domain Parameters</em></a></p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">The 163-bit curve sect163r2 is weak and deprecated and is only recommended for use in legacy protocols.</p>
+</div>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_BRAINPOOL_P_R1">
+<span id="c.PSA_ECC_FAMILY_BRAINPOOL_P_R1"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_BRAINPOOL_P_R1</span></code> (macro)</h3>
+<p>Brainpool P random curves.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_BRAINPOOL_P_R1" title="PSA_ECC_FAMILY_BRAINPOOL_P_R1">PSA_ECC_FAMILY_BRAINPOOL_P_R1</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x30)
+</pre>
+<p>This family comprises the following curves:</p>
+<ul class="simple">
+<li>brainpoolP160r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">160</span></code> <em>(Deprecated)</em></li>
+<li>brainpoolP192r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">192</span></code></li>
+<li>brainpoolP224r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">224</span></code></li>
+<li>brainpoolP256r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">256</span></code></li>
+<li>brainpoolP320r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">320</span></code></li>
+<li>brainpoolP384r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">384</span></code></li>
+<li>brainpoolP512r1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">512</span></code></li>
+</ul>
+<p>They are defined in <a class="reference external" href="https://tools.ietf.org/html/rfc5639.html">RFC 5639</a>.</p>
+<div class="admonition warning">
+<p class="first admonition-title">Warning</p>
+<p class="last">The 160-bit curve brainpoolP160r1 is weak and deprecated and is only recommended for use in legacy protocols.</p>
+</div>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_FRP">
+<span id="c.PSA_ECC_FAMILY_FRP"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_FRP</span></code> (macro)</h3>
+<p>Curve used primarily in France and elsewhere in Europe.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_FRP" title="PSA_ECC_FAMILY_FRP">PSA_ECC_FAMILY_FRP</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x33)
+</pre>
+<p>This family comprises one 256-bit curve:</p>
+<ul class="simple">
+<li>FRP256v1 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">256</span></code></li>
+</ul>
+<p>This is defined by <em>Agence nationale de la sécurité des systèmes d’information</em> in <a class="reference external" href="https://www.ssi.gouv.fr/agence/publication/publication-dun-parametrage-de-courbe-elliptique-visant-des-applications-de-passeport-electronique-et-de-ladministration-electronique-francaise/"><em>Publication d’un paramétrage de courbe elliptique visant des applications de passeport électronique et de l’administration électronique française</em></a>, 21 November 2011.</p>
+</div>
+<div class="section" id="PSA_ECC_FAMILY_MONTGOMERY">
+<span id="c.PSA_ECC_FAMILY_MONTGOMERY"></span><h3><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_MONTGOMERY</span></code> (macro)</h3>
+<p>Montgomery curves.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_ECC_FAMILY_MONTGOMERY" title="PSA_ECC_FAMILY_MONTGOMERY">PSA_ECC_FAMILY_MONTGOMERY</a> ((<a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t">psa_ecc_family_t</a>) 0x41)
+</pre>
+<p>This family comprises the following Montgomery curves:</p>
+<ul>
+<li><p class="first">Curve25519 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">255</span></code></p>
+<p>This curve is defined in Bernstein et al., <a class="reference external" href="https://www.iacr.org/archive/pkc2006/39580209/39580209.pdf"><em>Curve25519: new Diffie-Hellman speed records</em></a>, LNCS 3958, 2006.</p>
+<p>The algorithm <a class="reference internal" href="../ops/ka.html#c.PSA_ALG_ECDH" title="PSA_ALG_ECDH"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_ECDH</span></code></a> performs X25519 when used with this curve.</p>
+</li>
+<li><p class="first">Curve448 : <code class="docutils literal"><span class="pre">key_bits</span> <span class="pre">=</span> <span class="pre">448</span></code></p>
+<p>This curve is defined in Hamburg, <a class="reference external" href="https://eprint.iacr.org/2015/625.pdf"><em>Ed448-Goldilocks, a new elliptic curve</em></a>, NIST ECC Workshop, 2015.</p>
+<p>The algorithm <a class="reference internal" href="../ops/ka.html#c.PSA_ALG_ECDH" title="PSA_ALG_ECDH"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ALG_ECDH</span></code></a> performs X448 when used with this curve.</p>
+</li>
+</ul>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_ECC">
+<span id="c.PSA_KEY_TYPE_IS_ECC"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC</span></code> (macro)</h3>
+<p>Whether a key type is an elliptic curve key, either a key pair or a public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_ECC" title="PSA_KEY_TYPE_IS_ECC">PSA_KEY_TYPE_IS_ECC</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_ECC_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_IS_ECC_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_KEY_PAIR</span></code> (macro)</h3>
+<p>Whether a key type is an elliptic curve key pair.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_ECC_KEY_PAIR" title="PSA_KEY_TYPE_IS_ECC_KEY_PAIR">PSA_KEY_TYPE_IS_ECC_KEY_PAIR</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY</span></code> (macro)</h3>
+<p>Whether a key type is an elliptic curve public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY" title="PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY">PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_ECC_GET_FAMILY">
+<span id="c.PSA_KEY_TYPE_ECC_GET_FAMILY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_GET_FAMILY</span></code> (macro)</h3>
+<p>Extract the curve family from an elliptic curve key type.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_ECC_GET_FAMILY" title="PSA_KEY_TYPE_ECC_GET_FAMILY">PSA_KEY_TYPE_ECC_GET_FAMILY</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>An elliptic curve key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a> such that <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_ECC" title="PSA_KEY_TYPE_IS_ECC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC</span></code></a><code class="docutils literal"><span class="pre">(</span></code><code class="docutils literal"><span class="pre">type</span></code><code class="docutils literal"><span class="pre">)</span></code> is true).</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="#c.psa_ecc_family_t" title="psa_ecc_family_t"><code class="docutils literal"><span class="pre">psa_ecc_family_t</span></code></a></p>
+<p>The elliptic curve family id, if <code class="docutils literal"><span class="pre">type</span></code> is a supported elliptic curve key. Unspecified if <code class="docutils literal"><span class="pre">type</span></code> is not a supported elliptic curve key.</p>
+</div>
+</div>
+<div class="section" id="diffie-hellman-keys">
+<h2>Diffie Hellman keys</h2>
+<div class="section" id="psa_dh_family_t">
+<span id="c.psa_dh_family_t"></span><h3><code class="docutils literal"><span class="pre">psa_dh_family_t</span></code> (type)</h3>
+<p>The type of PSA Diffie-Hellman group family identifiers.</p>
+<pre class="literal-block">
+typedef uint8_t <a class="reference internal" href="#c.psa_dh_family_t" title="psa_dh_family_t">psa_dh_family_t</a>;
+</pre>
+<p>The group family identifier is required to create an Diffie-Hellman key using the <a class="reference internal" href="#c.PSA_KEY_TYPE_DH_KEY_PAIR" title="PSA_KEY_TYPE_DH_KEY_PAIR"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_DH_KEY_PAIR()</span></code></a> or <a class="reference internal" href="#c.PSA_KEY_TYPE_DH_PUBLIC_KEY" title="PSA_KEY_TYPE_DH_PUBLIC_KEY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_DH_PUBLIC_KEY()</span></code></a> macros.</p>
+<p>The specific Diffie-Hellman group within a family is identified by the <code class="docutils literal"><span class="pre">key_bits</span></code> attribute of the key.</p>
+<p>The range of Diffie-Hellman group family identifier values is divided as follows:</p>
+<dl class="docutils">
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x00</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">x7f</span></code></dt>
+<dd>DH group family identifiers defined by this standard.
+Unallocated values in this range are reserved for future use.</dd>
+<dt><code class="docutils literal"><span class="pre">0</span></code><code class="docutils literal"><span class="pre">x80</span></code><code class="docutils literal"> <span class="pre">-</span> <span class="pre">0</span></code><code class="docutils literal"><span class="pre">xff</span></code></dt>
+<dd>Implementations that define additional families must use an encoding in this range.</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_DH_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_DH_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_KEY_PAIR</span></code> (macro)</h3>
+<p>Diffie-Hellman key pair: both the private key and public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_DH_KEY_PAIR" title="PSA_KEY_TYPE_DH_KEY_PAIR">PSA_KEY_TYPE_DH_KEY_PAIR</a>(group) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">group</span></code></dt>
+<dd>A value of type <a class="reference internal" href="#c.psa_dh_family_t" title="psa_dh_family_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_dh_family_t</span></code></a> that identifies the Diffie-Hellman group family to be used.</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_DH_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_DH_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_PUBLIC_KEY</span></code> (macro)</h3>
+<p>Diffie-Hellman public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_DH_PUBLIC_KEY" title="PSA_KEY_TYPE_DH_PUBLIC_KEY">PSA_KEY_TYPE_DH_PUBLIC_KEY</a>(group) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">group</span></code></dt>
+<dd>A value of type <a class="reference internal" href="#c.psa_dh_family_t" title="psa_dh_family_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_dh_family_t</span></code></a> that identifies the Diffie-Hellman group family to be used.</dd>
+</dl>
+</div>
+<div class="section" id="PSA_DH_FAMILY_RFC7919">
+<span id="c.PSA_DH_FAMILY_RFC7919"></span><h3><code class="docutils literal"><span class="pre">PSA_DH_FAMILY_RFC7919</span></code> (macro)</h3>
+<p>Diffie-Hellman groups defined in <a class="reference external" href="https://tools.ietf.org/html/rfc7919.html#appendix-A">RFC 7919 Appendix A</a>.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_DH_FAMILY_RFC7919" title="PSA_DH_FAMILY_RFC7919">PSA_DH_FAMILY_RFC7919</a> ((<a class="reference internal" href="#c.psa_dh_family_t" title="psa_dh_family_t">psa_dh_family_t</a>) 0x03)
+</pre>
+<p>This family includes groups with the following key sizes (in bits): 2048, 3072, 4096, 6144, 8192.
+An implementation can support all of these sizes or only a subset.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY</span></code> (macro)</h3>
+<p>The key pair type corresponding to a public key type.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY" title="PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY">PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY</a>(type) \
+    <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A public key type or key pair type.</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p>The corresponding key pair type. If <code class="docutils literal"><span class="pre">type</span></code> is not a public key or a key pair, the return value is undefined.</p>
+<p class="rubric">Description</p>
+<p>If <code class="docutils literal"><span class="pre">type</span></code> is a key pair type, it will be left unchanged.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR</span></code> (macro)</h3>
+<p>The public key type corresponding to a key pair type.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR" title="PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR">PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR</a>(type) \
+    <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A public key type or key pair type.</dd>
+</dl>
+<p class="rubric">Returns</p>
+<p>The corresponding public key type. If <code class="docutils literal"><span class="pre">type</span></code> is not a public key or a key pair, the return value is undefined.</p>
+<p class="rubric">Description</p>
+<p>If <code class="docutils literal"><span class="pre">type</span></code> is a public key type, it will be left unchanged.</p>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_DH">
+<span id="c.PSA_KEY_TYPE_IS_DH"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH</span></code> (macro)</h3>
+<p>Whether a key type is a Diffie-Hellman key, either a key pair or a public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_DH" title="PSA_KEY_TYPE_IS_DH">PSA_KEY_TYPE_IS_DH</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_DH_KEY_PAIR">
+<span id="c.PSA_KEY_TYPE_IS_DH_KEY_PAIR"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_KEY_PAIR</span></code> (macro)</h3>
+<p>Whether a key type is a Diffie-Hellman key pair.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_DH_KEY_PAIR" title="PSA_KEY_TYPE_IS_DH_KEY_PAIR">PSA_KEY_TYPE_IS_DH_KEY_PAIR</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_IS_DH_PUBLIC_KEY">
+<span id="c.PSA_KEY_TYPE_IS_DH_PUBLIC_KEY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_PUBLIC_KEY</span></code> (macro)</h3>
+<p>Whether a key type is a Diffie-Hellman public key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_DH_PUBLIC_KEY" title="PSA_KEY_TYPE_IS_DH_PUBLIC_KEY">PSA_KEY_TYPE_IS_DH_PUBLIC_KEY</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a>).</dd>
+</dl>
+</div>
+<div class="section" id="PSA_KEY_TYPE_DH_GET_FAMILY">
+<span id="c.PSA_KEY_TYPE_DH_GET_FAMILY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_GET_FAMILY</span></code> (macro)</h3>
+<p>Extract the group family from a Diffie-Hellman key type.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_TYPE_DH_GET_FAMILY" title="PSA_KEY_TYPE_DH_GET_FAMILY">PSA_KEY_TYPE_DH_GET_FAMILY</a>(type) <em><a class="reference internal" href="../../overview/implementation.html#specification-defined-value"><span class="std std-ref">/* specification-defined value */</span></a></em>
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>A Diffie-Hellman key type (value of type <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_type_t</span></code></a> such that <a class="reference internal" href="#c.PSA_KEY_TYPE_IS_DH" title="PSA_KEY_TYPE_IS_DH"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH</span></code></a><code class="docutils literal"><span class="pre">(</span></code><code class="docutils literal"><span class="pre">type</span></code><code class="docutils literal"><span class="pre">)</span></code> is true).</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="#c.psa_dh_family_t" title="psa_dh_family_t"><code class="docutils literal"><span class="pre">psa_dh_family_t</span></code></a></p>
+<p>The Diffie-Hellman group family id, if <code class="docutils literal"><span class="pre">type</span></code> is a supported Diffie-Hellman key. Unspecified if <code class="docutils literal"><span class="pre">type</span></code> is not a supported Diffie-Hellman key.</p>
+</div>
+</div>
+<div class="section" id="attribute-accessors">
+<h2>Attribute accessors</h2>
+<div class="section" id="psa_set_key_type">
+<span id="c.psa_set_key_type"></span><h3><code class="docutils literal"><span class="pre">psa_set_key_type</span></code> (function)</h3>
+<p>Declare the type of a key.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_set_key_type" title="psa_set_key_type">psa_set_key_type</a>(<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                      <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a> type);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to write to.</dd>
+<dt> <code class="docutils literal"><span class="pre">type</span></code></dt>
+<dd>The key type to write. If this is <a class="reference internal" href="#c.PSA_KEY_TYPE_NONE" title="PSA_KEY_TYPE_NONE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_TYPE_NONE</span></code></a>, the key type in <code class="docutils literal"><span class="pre">attributes</span></code> becomes unspecified.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>This function overwrites any key type previously set in <code class="docutils literal"><span class="pre">attributes</span></code>.</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_get_key_type">
+<span id="c.psa_get_key_type"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_type</span></code> (function)</h3>
+<p>Retrieve the key type from key attributes.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t">psa_key_type_t</a> <a class="reference internal" href="#c.psa_get_key_type" title="psa_get_key_type">psa_get_key_type</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The key attribute object to query.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="attributes.html#c.psa_key_type_t" title="psa_key_type_t"><code class="docutils literal"><span class="pre">psa_key_type_t</span></code></a></p>
+<p>The key type stored in the attribute object.</p>
+<p class="rubric">Description</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_get_key_bits">
+<span id="c.psa_get_key_bits"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_bits</span></code> (function)</h3>
+<p>Retrieve the key size from key attributes.</p>
+<pre class="literal-block">
+size_t <a class="reference internal" href="#c.psa_get_key_bits" title="psa_get_key_bits">psa_get_key_bits</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The key attribute object to query.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">size_t</span></code></p>
+<p>The key size stored in the attribute object, in bits.</p>
+<p class="rubric">Description</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_set_key_bits">
+<span id="c.psa_set_key_bits"></span><h3><code class="docutils literal"><span class="pre">psa_set_key_bits</span></code> (function)</h3>
+<p>Declare the size of a key.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_set_key_bits" title="psa_set_key_bits">psa_set_key_bits</a>(<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                      size_t bits);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to write to.</dd>
+<dt> <code class="docutils literal"><span class="pre">bits</span></code></dt>
+<dd>The key size in bits. If this is <code class="docutils literal"><span class="pre">0</span></code>, the key size in <code class="docutils literal"><span class="pre">attributes</span></code> becomes unspecified. Keys of size <code class="docutils literal"><span class="pre">0</span></code> are not supported.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>This function overwrites any key size previously set in <code class="docutils literal"><span class="pre">attributes</span></code>.</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+  <h3><a href="../../index.html">Table Of Contents</a></h3>
+  <ul>
+<li><a class="reference internal" href="#">Key types</a><ul>
+<li><a class="reference internal" href="#key-categories">Key categories</a><ul>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_NONE"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_NONE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_UNSTRUCTURED"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_UNSTRUCTURED</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_ASYMMETRIC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ASYMMETRIC</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_KEY_PAIR</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#symmetric-keys">Symmetric keys</a><ul>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_RAW_DATA"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RAW_DATA</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_HMAC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_HMAC</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_DERIVE"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DERIVE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_AES"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_AES</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_DES"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DES</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_CAMELLIA"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_CAMELLIA</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_ARC4"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ARC4</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_CHACHA20"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_CHACHA20</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#rsa-keys">RSA keys</a><ul>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_RSA_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_RSA_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_RSA_KEY_PAIR</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_RSA"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_RSA</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#elliptic-curve-keys">Elliptic Curve keys</a><ul>
+<li><a class="reference internal" href="#psa_ecc_family_t"><code class="docutils literal"><span class="pre">psa_ecc_family_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_ECC_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_KEY_PAIR</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_ECC_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_SECP_K1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_K1</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_SECP_R1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_R1</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_SECP_R2"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECP_R2</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_SECT_K1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_K1</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_SECT_R1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_R1</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_SECT_R2"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_SECT_R2</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_BRAINPOOL_P_R1"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_BRAINPOOL_P_R1</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_FRP"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_FRP</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_ECC_FAMILY_MONTGOMERY"><code class="docutils literal"><span class="pre">PSA_ECC_FAMILY_MONTGOMERY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_ECC"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_ECC_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_KEY_PAIR</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_ECC_GET_FAMILY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_ECC_GET_FAMILY</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#diffie-hellman-keys">Diffie Hellman keys</a><ul>
+<li><a class="reference internal" href="#psa_dh_family_t"><code class="docutils literal"><span class="pre">psa_dh_family_t</span></code> (type)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_DH_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_KEY_PAIR</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_DH_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_DH_FAMILY_RFC7919"><code class="docutils literal"><span class="pre">PSA_DH_FAMILY_RFC7919</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_KEY_PAIR_OF_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_DH"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_DH_KEY_PAIR"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_KEY_PAIR</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_IS_DH_PUBLIC_KEY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_IS_DH_PUBLIC_KEY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_TYPE_DH_GET_FAMILY"><code class="docutils literal"><span class="pre">PSA_KEY_TYPE_DH_GET_FAMILY</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#attribute-accessors">Attribute accessors</a><ul>
+<li><a class="reference internal" href="#psa_set_key_type"><code class="docutils literal"><span class="pre">psa_set_key_type</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_type"><code class="docutils literal"><span class="pre">psa_get_key_type</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_bits"><code class="docutils literal"><span class="pre">psa_get_key_bits</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_set_key_bits"><code class="docutils literal"><span class="pre">psa_set_key_bits</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+  <li><a href="index.html">Key management reference</a><ul>
+      <li>Previous: <a href="locations.html" title="previous chapter">Key locations</a></li>
+      <li>Next: <a href="usage.html" title="next chapter">Key policies</a></li>
+  </ul></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/types.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/types.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file
diff --git a/docs/html/api/keys/usage.html b/docs/html/api/keys/usage.html
new file mode 100644
index 0000000..984b37c
--- /dev/null
+++ b/docs/html/api/keys/usage.html
@@ -0,0 +1,309 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Key policies &#8212; PSA Crypto API 1.0.0 documentation</title>
+    <link rel="stylesheet" href="../../_static/alabaster.css" type="text/css" />
+    <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" />
+    <script type="text/javascript">
+      var DOCUMENTATION_OPTIONS = {
+        URL_ROOT:    '../../',
+        VERSION:     '1.0.0',
+        COLLAPSE_INDEX: false,
+        FILE_SUFFIX: '.html',
+        HAS_SOURCE:  true,
+        SOURCELINK_SUFFIX: '.txt'
+      };
+    </script>
+    <script type="text/javascript" src="../../_static/jquery.js"></script>
+    <script type="text/javascript" src="../../_static/underscore.js"></script>
+    <script type="text/javascript" src="../../_static/doctools.js"></script>
+    <link rel="index" title="Index" href="../../genindex.html" />
+    <link rel="search" title="Search" href="../../search.html" />
+    <link rel="next" title="Algorithms" href="algorithms.html" />
+    <link rel="prev" title="Key types" href="types.html" />
+   
+  <link rel="stylesheet" href="../../_static/custom.css" type="text/css" />
+  
+  <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
+
+  </head>
+  <body>
+  
+
+    <div class="document">
+      <div class="documentwrapper">
+        <div class="bodywrapper">
+          <div class="body" role="main">
+            
+  <div class="section" id="key-policies">
+<span id="key-usage"></span><h1>Key policies</h1>
+<div class="section" id="key-usage-flags">
+<h2>Key usage flags</h2>
+<div class="section" id="PSA_KEY_USAGE_EXPORT">
+<span id="c.PSA_KEY_USAGE_EXPORT"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code> (macro)</h3>
+<p>Permission to export the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT">PSA_KEY_USAGE_EXPORT</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000001)
+</pre>
+<p>This flag allows the use of <a class="reference internal" href="management.html#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> to export a key from the cryptoprocessor. A public key or the public part of a key pair can always be exported regardless of the value of this permission flag.</p>
+<p>This flag can also be required to copy a key using <a class="reference internal" href="management.html#c.psa_copy_key" title="psa_copy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_copy_key()</span></code></a> outside of a secure element. See also <a class="reference internal" href="#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a>.</p>
+<p>If a key does not have export permission, implementations must not allow the key to be exported in plain form from the cryptoprocessor, whether through <a class="reference internal" href="management.html#c.psa_export_key" title="psa_export_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_export_key()</span></code></a> or through a proprietary interface. The key might still be exportable in a wrapped form, i.e. in a form where it is encrypted by another key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_COPY">
+<span id="c.PSA_KEY_USAGE_COPY"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code> (macro)</h3>
+<p>Permission to copy the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY">PSA_KEY_USAGE_COPY</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000002)
+</pre>
+<p>This flag allows the use of <a class="reference internal" href="management.html#c.psa_copy_key" title="psa_copy_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_copy_key()</span></code></a> to make a copy of the key with the same policy or a more restrictive policy.</p>
+<p>For lifetimes for which the key is located in a secure element which enforce the non-exportability of keys, copying a key outside the secure element also requires the usage flag <a class="reference internal" href="#c.PSA_KEY_USAGE_EXPORT" title="PSA_KEY_USAGE_EXPORT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code></a>. Copying the key inside the secure element is permitted with just <a class="reference internal" href="#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a> if the secure element supports it. For keys with the lifetime <a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_VOLATILE" title="PSA_KEY_LIFETIME_VOLATILE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_VOLATILE</span></code></a> or <a class="reference internal" href="locations.html#c.PSA_KEY_LIFETIME_PERSISTENT" title="PSA_KEY_LIFETIME_PERSISTENT"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_LIFETIME_PERSISTENT</span></code></a>, the usage flag <a class="reference internal" href="#c.PSA_KEY_USAGE_COPY" title="PSA_KEY_USAGE_COPY"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code></a> is sufficient to permit the copy.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_CACHE">
+<span id="c.PSA_KEY_USAGE_CACHE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_CACHE</span></code> (macro)</h3>
+<p>Permission for the implementation to cache the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_CACHE" title="PSA_KEY_USAGE_CACHE">PSA_KEY_USAGE_CACHE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000004)
+</pre>
+<p>This flag allows the implementation to make additional copies of the key material that are not in storage and not for the purpose of an ongoing operation. Applications can use it as a hint to keep the key around for repeated access.</p>
+<p>An application can request that cached key material is removed from memory by calling <a class="reference internal" href="management.html#c.psa_purge_key" title="psa_purge_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_purge_key()</span></code></a>.</p>
+<p>The presence of this key policy when creating a key is a hint:</p>
+<ul class="simple">
+<li>An implementation is not required to cache keys that have this policy.</li>
+<li>An implementation must not report an error if it does not cache keys.</li>
+</ul>
+<p>If this key policy is not present, the implementation must ensure key material is removed from memory as soon as it is not required for an operation or for maintenance of a volatile key.</p>
+<p>This flag must be preserved when reading back the attributes for all keys, regardless of key type or implementation behavior.</p>
+<p>See also <em><a class="reference internal" href="../../overview/implementation.html#key-material"><span class="std std-ref">Managing key material</span></a></em>.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_ENCRYPT">
+<span id="c.PSA_KEY_USAGE_ENCRYPT"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_ENCRYPT</span></code> (macro)</h3>
+<p>Permission to encrypt a message with the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_ENCRYPT" title="PSA_KEY_USAGE_ENCRYPT">PSA_KEY_USAGE_ENCRYPT</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000100)
+</pre>
+<p>This flag allows the key to be used for a symmetric encryption operation, for an AEAD encryption-and-authentication operation, or for an asymmetric encryption operation, if otherwise permitted by the key’s type and policy. The flag must be present on keys used with the following APIs:</p>
+<ul class="simple">
+<li><a class="reference internal" href="../ops/ciphers.html#c.psa_cipher_encrypt" title="psa_cipher_encrypt"><code class="xref any c c-func docutils literal"><span class="pre">psa_cipher_encrypt()</span></code></a></li>
+<li><a class="reference internal" href="../ops/ciphers.html#c.psa_cipher_encrypt_setup" title="psa_cipher_encrypt_setup"><code class="xref any c c-func docutils literal"><span class="pre">psa_cipher_encrypt_setup()</span></code></a></li>
+<li><a class="reference internal" href="../ops/aead.html#c.psa_aead_encrypt" title="psa_aead_encrypt"><code class="xref any c c-func docutils literal"><span class="pre">psa_aead_encrypt()</span></code></a></li>
+<li><a class="reference internal" href="../ops/aead.html#c.psa_aead_encrypt_setup" title="psa_aead_encrypt_setup"><code class="xref any c c-func docutils literal"><span class="pre">psa_aead_encrypt_setup()</span></code></a></li>
+<li><a class="reference internal" href="../ops/pke.html#c.psa_asymmetric_encrypt" title="psa_asymmetric_encrypt"><code class="xref any c c-func docutils literal"><span class="pre">psa_asymmetric_encrypt()</span></code></a></li>
+</ul>
+<p>For a key pair, this concerns the public key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_DECRYPT">
+<span id="c.PSA_KEY_USAGE_DECRYPT"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_DECRYPT</span></code> (macro)</h3>
+<p>Permission to decrypt a message with the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_DECRYPT" title="PSA_KEY_USAGE_DECRYPT">PSA_KEY_USAGE_DECRYPT</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000200)
+</pre>
+<p>This flag allows the key to be used for a symmetric decryption operation, for an AEAD decryption-and-verification operation, or for an asymmetric decryption operation, if otherwise permitted by the key’s type and policy. The flag must be present on keys used with the following APIs:</p>
+<ul class="simple">
+<li><a class="reference internal" href="../ops/ciphers.html#c.psa_cipher_decrypt" title="psa_cipher_decrypt"><code class="xref any c c-func docutils literal"><span class="pre">psa_cipher_decrypt()</span></code></a></li>
+<li><a class="reference internal" href="../ops/ciphers.html#c.psa_cipher_decrypt_setup" title="psa_cipher_decrypt_setup"><code class="xref any c c-func docutils literal"><span class="pre">psa_cipher_decrypt_setup()</span></code></a></li>
+<li><a class="reference internal" href="../ops/aead.html#c.psa_aead_decrypt" title="psa_aead_decrypt"><code class="xref any c c-func docutils literal"><span class="pre">psa_aead_decrypt()</span></code></a></li>
+<li><a class="reference internal" href="../ops/aead.html#c.psa_aead_decrypt_setup" title="psa_aead_decrypt_setup"><code class="xref any c c-func docutils literal"><span class="pre">psa_aead_decrypt_setup()</span></code></a></li>
+<li><a class="reference internal" href="../ops/pke.html#c.psa_asymmetric_decrypt" title="psa_asymmetric_decrypt"><code class="xref any c c-func docutils literal"><span class="pre">psa_asymmetric_decrypt()</span></code></a></li>
+</ul>
+<p>For a key pair, this concerns the private key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_SIGN_MESSAGE">
+<span id="c.PSA_KEY_USAGE_SIGN_MESSAGE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_MESSAGE</span></code> (macro)</h3>
+<p>Permission to sign a message with the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_SIGN_MESSAGE" title="PSA_KEY_USAGE_SIGN_MESSAGE">PSA_KEY_USAGE_SIGN_MESSAGE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000400)
+</pre>
+<p>This flag allows the key to be used for a MAC calculation operation or for an asymmetric message signature operation, if otherwise permitted by the key’s type and policy. The flag must be present on keys used with the following APIs:</p>
+<ul class="simple">
+<li><a class="reference internal" href="../ops/macs.html#c.psa_mac_compute" title="psa_mac_compute"><code class="xref any c c-func docutils literal"><span class="pre">psa_mac_compute()</span></code></a></li>
+<li><a class="reference internal" href="../ops/macs.html#c.psa_mac_sign_setup" title="psa_mac_sign_setup"><code class="xref any c c-func docutils literal"><span class="pre">psa_mac_sign_setup()</span></code></a></li>
+<li><a class="reference internal" href="../ops/sign.html#c.psa_sign_message" title="psa_sign_message"><code class="xref any c c-func docutils literal"><span class="pre">psa_sign_message()</span></code></a></li>
+</ul>
+<p>For a key pair, this concerns the private key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_VERIFY_MESSAGE">
+<span id="c.PSA_KEY_USAGE_VERIFY_MESSAGE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_MESSAGE</span></code> (macro)</h3>
+<p>Permission to verify a message signature with the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_VERIFY_MESSAGE" title="PSA_KEY_USAGE_VERIFY_MESSAGE">PSA_KEY_USAGE_VERIFY_MESSAGE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00000800)
+</pre>
+<p>This flag allows the key to be used for a MAC verification operation or for an asymmetric message signature verification operation, if otherwise permitted by the key’s type and policy. The flag must be present on keys used with the following APIs:</p>
+<ul class="simple">
+<li><a class="reference internal" href="../ops/macs.html#c.psa_mac_verify" title="psa_mac_verify"><code class="xref any c c-func docutils literal"><span class="pre">psa_mac_verify()</span></code></a></li>
+<li><a class="reference internal" href="../ops/macs.html#c.psa_mac_verify_setup" title="psa_mac_verify_setup"><code class="xref any c c-func docutils literal"><span class="pre">psa_mac_verify_setup()</span></code></a></li>
+<li><a class="reference internal" href="../ops/sign.html#c.psa_verify_message" title="psa_verify_message"><code class="xref any c c-func docutils literal"><span class="pre">psa_verify_message()</span></code></a></li>
+</ul>
+<p>For a key pair, this concerns the public key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_SIGN_HASH">
+<span id="c.PSA_KEY_USAGE_SIGN_HASH"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_HASH</span></code> (macro)</h3>
+<p>Permission to sign a message hash with the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_SIGN_HASH" title="PSA_KEY_USAGE_SIGN_HASH">PSA_KEY_USAGE_SIGN_HASH</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00001000)
+</pre>
+<p>This flag allows the key to be used to sign a message hash as part of an asymmetric signature operation, if otherwise permitted by the key’s type and policy. The flag must be present on keys used when calling <a class="reference internal" href="../ops/sign.html#c.psa_sign_hash" title="psa_sign_hash"><code class="xref any c c-func docutils literal"><span class="pre">psa_sign_hash()</span></code></a>.</p>
+<p>This flag automatically sets <a class="reference internal" href="#c.PSA_KEY_USAGE_SIGN_MESSAGE" title="PSA_KEY_USAGE_SIGN_MESSAGE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_MESSAGE</span></code></a>: if an application sets the flag <a class="reference internal" href="#c.PSA_KEY_USAGE_SIGN_HASH" title="PSA_KEY_USAGE_SIGN_HASH"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_HASH</span></code></a> when creating a key, then the key always has the permissions conveyed by <a class="reference internal" href="#c.PSA_KEY_USAGE_SIGN_MESSAGE" title="PSA_KEY_USAGE_SIGN_MESSAGE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_MESSAGE</span></code></a>, and the flag <a class="reference internal" href="#c.PSA_KEY_USAGE_SIGN_MESSAGE" title="PSA_KEY_USAGE_SIGN_MESSAGE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_MESSAGE</span></code></a> will also be present when the application queries the usage policy of the key.</p>
+<p>For a key pair, this concerns the private key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_VERIFY_HASH">
+<span id="c.PSA_KEY_USAGE_VERIFY_HASH"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_HASH</span></code> (macro)</h3>
+<p>Permission to verify a message hash with the key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_VERIFY_HASH" title="PSA_KEY_USAGE_VERIFY_HASH">PSA_KEY_USAGE_VERIFY_HASH</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00002000)
+</pre>
+<p>This flag allows the key to be used to verify a message hash as part of an asymmetric signature verification operation, if otherwise permitted by the key’s type and policy. The flag must be present on keys used when calling <a class="reference internal" href="../ops/sign.html#c.psa_verify_hash" title="psa_verify_hash"><code class="xref any c c-func docutils literal"><span class="pre">psa_verify_hash()</span></code></a>.</p>
+<p>This flag automatically sets <a class="reference internal" href="#c.PSA_KEY_USAGE_VERIFY_MESSAGE" title="PSA_KEY_USAGE_VERIFY_MESSAGE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_MESSAGE</span></code></a>: if an application sets the flag <a class="reference internal" href="#c.PSA_KEY_USAGE_VERIFY_HASH" title="PSA_KEY_USAGE_VERIFY_HASH"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_HASH</span></code></a> when creating a key, then the key always has the permissions conveyed by <a class="reference internal" href="#c.PSA_KEY_USAGE_VERIFY_MESSAGE" title="PSA_KEY_USAGE_VERIFY_MESSAGE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_MESSAGE</span></code></a>, and the flag <a class="reference internal" href="#c.PSA_KEY_USAGE_VERIFY_MESSAGE" title="PSA_KEY_USAGE_VERIFY_MESSAGE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_MESSAGE</span></code></a> will also be present when the application queries the usage policy of the key.</p>
+<p>For a key pair, this concerns the public key.</p>
+</div>
+<div class="section" id="PSA_KEY_USAGE_DERIVE">
+<span id="c.PSA_KEY_USAGE_DERIVE"></span><h3><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_DERIVE</span></code> (macro)</h3>
+<p>Permission to derive other keys from this key.</p>
+<pre class="literal-block">
+#define <a class="reference internal" href="#c.PSA_KEY_USAGE_DERIVE" title="PSA_KEY_USAGE_DERIVE">PSA_KEY_USAGE_DERIVE</a> ((<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a>)0x00004000)
+</pre>
+<p>This flag allows the key to be used for a key derivation operation or for a key agreement operation, if otherwise permitted by by the key’s type and policy. The flag must be present on keys used with the following APIs:</p>
+<ul class="simple">
+<li><a class="reference internal" href="../ops/kdf.html#c.psa_key_derivation_input_key" title="psa_key_derivation_input_key"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_derivation_input_key()</span></code></a></li>
+<li><a class="reference internal" href="../ops/ka.html#c.psa_key_derivation_key_agreement" title="psa_key_derivation_key_agreement"><code class="xref any c c-func docutils literal"><span class="pre">psa_key_derivation_key_agreement()</span></code></a></li>
+<li><a class="reference internal" href="../ops/ka.html#c.psa_raw_key_agreement" title="psa_raw_key_agreement"><code class="xref any c c-func docutils literal"><span class="pre">psa_raw_key_agreement()</span></code></a></li>
+</ul>
+</div>
+</div>
+<div class="section" id="attribute-accessors">
+<h2>Attribute accessors</h2>
+<div class="section" id="psa_set_key_usage_flags">
+<span id="c.psa_set_key_usage_flags"></span><h3><code class="docutils literal"><span class="pre">psa_set_key_usage_flags</span></code> (function)</h3>
+<p>Declare usage flags for a key.</p>
+<pre class="literal-block">
+void <a class="reference internal" href="#c.psa_set_key_usage_flags" title="psa_set_key_usage_flags">psa_set_key_usage_flags</a>(<a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes,
+                             <a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a> usage_flags);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The attribute object to write to.</dd>
+<dt> <code class="docutils literal"><span class="pre">usage_flags</span></code></dt>
+<dd>The usage flags to write.</dd>
+</dl>
+<p class="rubric">Returns: <code class="docutils literal"><span class="pre">void</span></code></p>
+<p class="rubric">Description</p>
+<p>Usage flags are part of a key’s usage policy. They encode what kind of operations are permitted on the key. For more details, refer to the documentation of the type <a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_key_usage_t</span></code></a>.</p>
+<p>This function overwrites any usage flags previously set in <code class="docutils literal"><span class="pre">attributes</span></code>.</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+<div class="section" id="psa_get_key_usage_flags">
+<span id="c.psa_get_key_usage_flags"></span><h3><code class="docutils literal"><span class="pre">psa_get_key_usage_flags</span></code> (function)</h3>
+<p>Retrieve the usage flags from key attributes.</p>
+<pre class="literal-block">
+<a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t">psa_key_usage_t</a> <a class="reference internal" href="#c.psa_get_key_usage_flags" title="psa_get_key_usage_flags">psa_get_key_usage_flags</a>(const <a class="reference internal" href="attributes.html#c.psa_key_attributes_t" title="psa_key_attributes_t">psa_key_attributes_t</a> * attributes);
+</pre>
+<p class="rubric">Parameters</p>
+<dl class="docutils">
+<dt> <code class="docutils literal"><span class="pre">attributes</span></code></dt>
+<dd>The key attribute object to query.</dd>
+</dl>
+<p class="rubric">Returns: <a class="reference internal" href="attributes.html#c.psa_key_usage_t" title="psa_key_usage_t"><code class="docutils literal"><span class="pre">psa_key_usage_t</span></code></a></p>
+<p>The usage flags stored in the attribute object.</p>
+<p class="rubric">Description</p>
+<div class="admonition-implementation-note admonition">
+<p class="first admonition-title">Implementation note</p>
+<p>This is a simple accessor function that is not required to validate its inputs. The following approaches can be used to provide an efficient implementation:</p>
+<ul class="last simple">
+<li>This function can be declared as <code class="docutils literal"><span class="pre">static</span></code> or <code class="docutils literal"><span class="pre">inline</span></code>, instead of using the default external linkage.</li>
+<li>This function can be provided as a function-like macro. In this form, the macro must evaluate each of its arguments exactly once, as if it was a function call.</li>
+</ul>
+</div>
+</div>
+</div>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
+        <div class="sphinxsidebarwrapper">
+  <h3><a href="../../index.html">Table Of Contents</a></h3>
+  <ul>
+<li><a class="reference internal" href="#">Key policies</a><ul>
+<li><a class="reference internal" href="#key-usage-flags">Key usage flags</a><ul>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_EXPORT"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_EXPORT</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_COPY"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_COPY</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_CACHE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_CACHE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_ENCRYPT"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_ENCRYPT</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_DECRYPT"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_DECRYPT</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_SIGN_MESSAGE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_MESSAGE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_VERIFY_MESSAGE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_MESSAGE</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_SIGN_HASH"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_SIGN_HASH</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_VERIFY_HASH"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_VERIFY_HASH</span></code> (macro)</a></li>
+<li><a class="reference internal" href="#PSA_KEY_USAGE_DERIVE"><code class="docutils literal"><span class="pre">PSA_KEY_USAGE_DERIVE</span></code> (macro)</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#attribute-accessors">Attribute accessors</a><ul>
+<li><a class="reference internal" href="#psa_set_key_usage_flags"><code class="docutils literal"><span class="pre">psa_set_key_usage_flags</span></code> (function)</a></li>
+<li><a class="reference internal" href="#psa_get_key_usage_flags"><code class="docutils literal"><span class="pre">psa_get_key_usage_flags</span></code> (function)</a></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+<div class="relations">
+<h3>Related Topics</h3>
+<ul>
+  <li><a href="../../index.html">Documentation overview</a><ul>
+  <li><a href="index.html">Key management reference</a><ul>
+      <li>Previous: <a href="types.html" title="previous chapter">Key types</a></li>
+      <li>Next: <a href="algorithms.html" title="next chapter">Algorithms</a></li>
+  </ul></li>
+  </ul></li>
+</ul>
+</div>
+  <div role="note" aria-label="source link">
+    <h3>This Page</h3>
+    <ul class="this-page-menu">
+      <li><a href="../../_sources/api/keys/usage.rst.txt"
+            rel="nofollow">Show Source</a></li>
+    </ul>
+   </div>
+<div id="searchbox" style="display: none" role="search">
+  <h3>Quick search</h3>
+    <form class="search" action="../../search.html" method="get">
+      <div><input type="text" name="q" /></div>
+      <div><input type="submit" value="Go" /></div>
+      <input type="hidden" name="check_keywords" value="yes" />
+      <input type="hidden" name="area" value="default" />
+    </form>
+</div>
+<script type="text/javascript">$('#searchbox').show(0);</script>
+        </div>
+      </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer">
+      &copy; 2019-2020, Arm Limited or its affiliates. All rights reserved.
+      
+      |
+      Powered by <a href="http://sphinx-doc.org/">Sphinx 1.6.7</a>
+      &amp; <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.8</a>
+      
+      |
+      <a href="../../_sources/api/keys/usage.rst.txt"
+          rel="nofollow">Page source</a>
+    </div>
+
+    
+
+    
+  </body>
+</html>
\ No newline at end of file