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+  <td id="projectalign" style="padding-left: 0.5em;">
+   <div id="projectname">Platform Security Architecture — cryptography and keystore interface
+   &#160;<span id="projectnumber">beta 1 — 2019-01-21</span>
+   </div>
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+<div class="header">
+  <div class="summary">
+<a href="#define-members">Macros</a> &#124;
+<a href="#typedef-members">Typedefs</a> &#124;
+<a href="#func-members">Functions</a>  </div>
+  <div class="headertitle">
+<div class="title">Message digests</div>  </div>
+</div><!--header-->
+<div class="contents">
+<table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
+Macros</h2></td></tr>
+<tr class="memitem:ga6ab7fe8d3500bc2f21be840b4f4f8d1d"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga6ab7fe8d3500bc2f21be840b4f4f8d1d">PSA_HASH_OPERATION_INIT</a>&#160;&#160;&#160;{0}</td></tr>
+<tr class="separator:ga6ab7fe8d3500bc2f21be840b4f4f8d1d"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
+Typedefs</h2></td></tr>
+<tr class="memitem:ga3c4205d2ce66c4095fc5c78c25273fab"><td class="memItemLeft" align="right" valign="top">typedef struct psa_hash_operation_s&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a></td></tr>
+<tr class="separator:ga3c4205d2ce66c4095fc5c78c25273fab"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
+Functions</h2></td></tr>
+<tr class="memitem:gac69f7f19d96a56c28cf3799d11b12156"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#gac69f7f19d96a56c28cf3799d11b12156">psa_hash_compute</a> (<a class="el" href="group__crypto__types.html#gac2e4d47f1300d73c2f829a6d99252d69">psa_algorithm_t</a> alg, const uint8_t *input, size_t input_length, uint8_t *hash, size_t hash_size, size_t *hash_length)</td></tr>
+<tr class="separator:gac69f7f19d96a56c28cf3799d11b12156"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga0bb6dbd3c310648c3cf7d202413ff0bc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga0bb6dbd3c310648c3cf7d202413ff0bc">psa_hash_compare</a> (<a class="el" href="group__crypto__types.html#gac2e4d47f1300d73c2f829a6d99252d69">psa_algorithm_t</a> alg, const uint8_t *input, size_t input_length, const uint8_t *hash, const size_t hash_length)</td></tr>
+<tr class="separator:ga0bb6dbd3c310648c3cf7d202413ff0bc"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga8d72896cf70fc4d514c5c6b978912515"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup</a> (<a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *operation, <a class="el" href="group__crypto__types.html#gac2e4d47f1300d73c2f829a6d99252d69">psa_algorithm_t</a> alg)</td></tr>
+<tr class="separator:ga8d72896cf70fc4d514c5c6b978912515"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga65b16ef97d7f650899b7db4b7d1112ff"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga65b16ef97d7f650899b7db4b7d1112ff">psa_hash_update</a> (<a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *operation, const uint8_t *input, size_t input_length)</td></tr>
+<tr class="separator:ga65b16ef97d7f650899b7db4b7d1112ff"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga4795fd06a0067b0adcd92e9627b8c97e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga4795fd06a0067b0adcd92e9627b8c97e">psa_hash_finish</a> (<a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *operation, uint8_t *hash, size_t hash_size, size_t *hash_length)</td></tr>
+<tr class="separator:ga4795fd06a0067b0adcd92e9627b8c97e"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga7be923c5700c9c70ef77ee9b76d1a5c0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga7be923c5700c9c70ef77ee9b76d1a5c0">psa_hash_verify</a> (<a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *operation, const uint8_t *hash, size_t hash_length)</td></tr>
+<tr class="separator:ga7be923c5700c9c70ef77ee9b76d1a5c0"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:gab0b4d5f9912a615559497a467b532928"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#gab0b4d5f9912a615559497a467b532928">psa_hash_abort</a> (<a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *operation)</td></tr>
+<tr class="separator:gab0b4d5f9912a615559497a467b532928"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ga39673348f3302b4646bd780034a5aeda"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__hash.html#ga39673348f3302b4646bd780034a5aeda">psa_hash_clone</a> (const <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *source_operation, <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *target_operation)</td></tr>
+<tr class="separator:ga39673348f3302b4646bd780034a5aeda"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table>
+<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
+<h2 class="groupheader">Macro Definition Documentation</h2>
+<a class="anchor" id="ga6ab7fe8d3500bc2f21be840b4f4f8d1d"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">#define PSA_HASH_OPERATION_INIT&#160;&#160;&#160;{0}</td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>This macro returns a suitable initializer for a hash operation object of type <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a>. </p>
+
+</div>
+</div>
+<h2 class="groupheader">Typedef Documentation</h2>
+<a class="anchor" id="ga3c4205d2ce66c4095fc5c78c25273fab"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">typedef struct psa_hash_operation_s <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>The type of the state data structure for multipart hash operations.</p>
+<p>Before calling any function on a hash operation object, the application must initialize it by any of the following means:</p><ul>
+<li>Set the structure to all-bits-zero, for example: <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;psa_hash_operation_t operation;</div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;memset(&amp;operation, 0, sizeof(operation));</div></div><!-- fragment --></li>
+<li>Initialize the structure to logical zero values, for example: <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;psa_hash_operation_t operation = {0};</div></div><!-- fragment --></li>
+<li>Initialize the structure to the initializer <a class="el" href="group__hash.html#ga6ab7fe8d3500bc2f21be840b4f4f8d1d">PSA_HASH_OPERATION_INIT</a>, for example: <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;</div></div><!-- fragment --></li>
+<li>Assign the result of the function psa_hash_operation_init() to the structure, for example: <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;psa_hash_operation_t operation;</div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;operation = psa_hash_operation_init();</div></div><!-- fragment --></li>
+</ul>
+<p>This is an implementation-defined <code>struct</code>. Applications should not make any assumptions about the content of this structure except as directed by the documentation of a specific implementation. </p>
+
+</div>
+</div>
+<h2 class="groupheader">Function Documentation</h2>
+<a class="anchor" id="gab0b4d5f9912a615559497a467b532928"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_abort </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>operation</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Abort a hash operation.</p>
+<p>Aborting an operation frees all associated resources except for the <code>operation</code> structure itself. Once aborted, the operation object can be reused for another operation by calling <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a> again.</p>
+<p>You may call this function any time after the operation object has been initialized by any of the following methods:</p><ul>
+<li>A call to <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a>, whether it succeeds or not.</li>
+<li>Initializing the <code>struct</code> to all-bits-zero.</li>
+<li>Initializing the <code>struct</code> to logical zeros, e.g. <code>psa_hash_operation_t operation = {0}</code>.</li>
+</ul>
+<p>In particular, calling <a class="el" href="group__hash.html#gab0b4d5f9912a615559497a467b532928">psa_hash_abort()</a> after the operation has been terminated by a call to <a class="el" href="group__hash.html#gab0b4d5f9912a615559497a467b532928">psa_hash_abort()</a>, <a class="el" href="group__hash.html#ga4795fd06a0067b0adcd92e9627b8c97e">psa_hash_finish()</a> or <a class="el" href="group__hash.html#ga7be923c5700c9c70ef77ee9b76d1a5c0">psa_hash_verify()</a> is safe and has no effect.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir">[in,out]</td><td class="paramname">operation</td><td>Initialized hash operation.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td><code>operation</code> is not an active hash operation. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="ga39673348f3302b4646bd780034a5aeda"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_clone </td>
+          <td>(</td>
+          <td class="paramtype">const <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>source_operation</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>target_operation</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Clone a hash operation.</p>
+<p>This function copies the state of an ongoing hash operation to a new operation object. In other words, this function is equivalent to calling <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a> on <code>target_operation</code> with the same algorithm that <code>source_operation</code> was set up for, then <a class="el" href="group__hash.html#ga65b16ef97d7f650899b7db4b7d1112ff">psa_hash_update()</a> on <code>target_operation</code> with the same input that that was passed to <code>source_operation</code>. After this function returns, the two objects are independent, i.e. subsequent calls involving one of the objects do not affect the other object.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir">[in]</td><td class="paramname">source_operation</td><td>The active hash operation to clone. </td></tr>
+    <tr><td class="paramdir">[in,out]</td><td class="paramname">target_operation</td><td>The operation object to set up. It must be initialized but not active.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td><code>source_operation</code> is not an active hash operation. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td><code>target_operation</code> is active. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="ga0bb6dbd3c310648c3cf7d202413ff0bc"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_compare </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__crypto__types.html#gac2e4d47f1300d73c2f829a6d99252d69">psa_algorithm_t</a>&#160;</td>
+          <td class="paramname"><em>alg</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">const uint8_t *&#160;</td>
+          <td class="paramname"><em>input</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t&#160;</td>
+          <td class="paramname"><em>input_length</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">const uint8_t *&#160;</td>
+          <td class="paramname"><em>hash</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">const size_t&#160;</td>
+          <td class="paramname"><em>hash_length</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Calculate the hash (digest) of a message and compare it with a reference value.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir"></td><td class="paramname">alg</td><td>The hash algorithm to compute (<code>PSA_ALG_XXX</code> value such that <a class="el" href="group__crypto__types.html#gac9280662bb482590b4b33d1dcd32930f">PSA_ALG_IS_HASH</a>(<code>alg</code>) is true). </td></tr>
+    <tr><td class="paramdir">[in]</td><td class="paramname">input</td><td>Buffer containing the message to hash. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">input_length</td><td>Size of the <code>input</code> buffer in bytes. </td></tr>
+    <tr><td class="paramdir">[out]</td><td class="paramname">hash</td><td>Buffer containing the expected hash value. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">hash_length</td><td>Size of the <code>hash</code> buffer in bytes.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>The expected hash is identical to the actual hash of the input. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga35927f755d232c4766de600f2c49e9f2">PSA_ERROR_INVALID_SIGNATURE</a></td><td>The hash of the message was calculated successfully, but it differs from the expected hash. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga1dcc6d130633ed5db8942257581b55dd">PSA_ERROR_NOT_SUPPORTED</a></td><td><code>alg</code> is not supported or is not a hash algorithm. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="gac69f7f19d96a56c28cf3799d11b12156"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_compute </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__crypto__types.html#gac2e4d47f1300d73c2f829a6d99252d69">psa_algorithm_t</a>&#160;</td>
+          <td class="paramname"><em>alg</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">const uint8_t *&#160;</td>
+          <td class="paramname"><em>input</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t&#160;</td>
+          <td class="paramname"><em>input_length</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">uint8_t *&#160;</td>
+          <td class="paramname"><em>hash</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t&#160;</td>
+          <td class="paramname"><em>hash_size</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t *&#160;</td>
+          <td class="paramname"><em>hash_length</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Calculate the hash (digest) of a message.</p>
+<dl class="section note"><dt>Note</dt><dd>To verify the hash of a message against an expected value, use <a class="el" href="group__hash.html#ga0bb6dbd3c310648c3cf7d202413ff0bc">psa_hash_compare()</a> instead.</dd></dl>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir"></td><td class="paramname">alg</td><td>The hash algorithm to compute (<code>PSA_ALG_XXX</code> value such that <a class="el" href="group__crypto__types.html#gac9280662bb482590b4b33d1dcd32930f">PSA_ALG_IS_HASH</a>(<code>alg</code>) is true). </td></tr>
+    <tr><td class="paramdir">[in]</td><td class="paramname">input</td><td>Buffer containing the message to hash. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">input_length</td><td>Size of the <code>input</code> buffer in bytes. </td></tr>
+    <tr><td class="paramdir">[out]</td><td class="paramname">hash</td><td>Buffer where the hash is to be written. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">hash_size</td><td>Size of the <code>hash</code> buffer in bytes. </td></tr>
+    <tr><td class="paramdir">[out]</td><td class="paramname">hash_length</td><td>On success, the number of bytes that make up the hash value. This is always <a class="el" href="crypto__sizes_8h.html#aef340331ce3cba2b57e1fc5624bf1f99">PSA_HASH_SIZE</a>(<code>alg</code>) where <code>alg</code> is the hash algorithm that is calculated.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga1dcc6d130633ed5db8942257581b55dd">PSA_ERROR_NOT_SUPPORTED</a></td><td><code>alg</code> is not supported or is not a hash algorithm. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="ga4795fd06a0067b0adcd92e9627b8c97e"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_finish </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>operation</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">uint8_t *&#160;</td>
+          <td class="paramname"><em>hash</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t&#160;</td>
+          <td class="paramname"><em>hash_size</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t *&#160;</td>
+          <td class="paramname"><em>hash_length</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Finish the calculation of the hash of a message.</p>
+<p>The application must call <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a> before calling this function. This function calculates the hash of the message formed by concatenating the inputs passed to preceding calls to <a class="el" href="group__hash.html#ga65b16ef97d7f650899b7db4b7d1112ff">psa_hash_update()</a>.</p>
+<p>When this function returns, the operation becomes inactive.</p>
+<dl class="section warning"><dt>Warning</dt><dd>Applications should not call this function if they expect a specific value for the hash. Call <a class="el" href="group__hash.html#ga7be923c5700c9c70ef77ee9b76d1a5c0">psa_hash_verify()</a> instead. Beware that comparing integrity or authenticity data such as hash values with a function such as <code>memcmp</code> is risky because the time taken by the comparison may leak information about the hashed data which could allow an attacker to guess a valid hash and thereby bypass security controls.</dd></dl>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir">[in,out]</td><td class="paramname">operation</td><td>Active hash operation. </td></tr>
+    <tr><td class="paramdir">[out]</td><td class="paramname">hash</td><td>Buffer where the hash is to be written. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">hash_size</td><td>Size of the <code>hash</code> buffer in bytes. </td></tr>
+    <tr><td class="paramdir">[out]</td><td class="paramname">hash_length</td><td>On success, the number of bytes that make up the hash value. This is always <a class="el" href="crypto__sizes_8h.html#aef340331ce3cba2b57e1fc5624bf1f99">PSA_HASH_SIZE</a>(<code>alg</code>) where <code>alg</code> is the hash algorithm that is calculated.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td>The operation state is not valid (not set up, or already completed). </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga695025f4ec11249aee7ea3d0f65e01c8">PSA_ERROR_BUFFER_TOO_SMALL</a></td><td>The size of the <code>hash</code> buffer is too small. You can determine a sufficient buffer size by calling <a class="el" href="crypto__sizes_8h.html#aef340331ce3cba2b57e1fc5624bf1f99">PSA_HASH_SIZE</a>(<code>alg</code>) where <code>alg</code> is the hash algorithm that is calculated. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="ga8d72896cf70fc4d514c5c6b978912515"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_setup </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>operation</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype"><a class="el" href="group__crypto__types.html#gac2e4d47f1300d73c2f829a6d99252d69">psa_algorithm_t</a>&#160;</td>
+          <td class="paramname"><em>alg</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Set up a multipart hash operation.</p>
+<p>The sequence of operations to calculate a hash (message digest) is as follows:</p><ol type="1">
+<li>Allocate an operation object which will be passed to all the functions listed here.</li>
+<li>Initialize the operation object with one of the methods described in the documentation for <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a>, e.g. PSA_HASH_OPERATION_INIT.</li>
+<li>Call <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a> to specify the algorithm.</li>
+<li>Call <a class="el" href="group__hash.html#ga65b16ef97d7f650899b7db4b7d1112ff">psa_hash_update()</a> zero, one or more times, passing a fragment of the message each time. The hash that is calculated is the hash of the concatenation of these messages in order.</li>
+<li>To calculate the hash, call <a class="el" href="group__hash.html#ga4795fd06a0067b0adcd92e9627b8c97e">psa_hash_finish()</a>. To compare the hash with an expected value, call <a class="el" href="group__hash.html#ga7be923c5700c9c70ef77ee9b76d1a5c0">psa_hash_verify()</a>.</li>
+</ol>
+<p>The application may call <a class="el" href="group__hash.html#gab0b4d5f9912a615559497a467b532928">psa_hash_abort()</a> at any time after the operation has been initialized.</p>
+<p>After a successful call to <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a>, the application must eventually terminate the operation. The following events terminate an operation:</p><ul>
+<li>A failed call to <a class="el" href="group__hash.html#ga65b16ef97d7f650899b7db4b7d1112ff">psa_hash_update()</a>.</li>
+<li>A call to <a class="el" href="group__hash.html#ga4795fd06a0067b0adcd92e9627b8c97e">psa_hash_finish()</a>, <a class="el" href="group__hash.html#ga7be923c5700c9c70ef77ee9b76d1a5c0">psa_hash_verify()</a> or <a class="el" href="group__hash.html#gab0b4d5f9912a615559497a467b532928">psa_hash_abort()</a>.</li>
+</ul>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir">[in,out]</td><td class="paramname">operation</td><td>The operation object to set up. It must have been initialized as per the documentation for <a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> and not yet in use. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">alg</td><td>The hash algorithm to compute (<code>PSA_ALG_XXX</code> value such that <a class="el" href="group__crypto__types.html#gac9280662bb482590b4b33d1dcd32930f">PSA_ALG_IS_HASH</a>(<code>alg</code>) is true).</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga1dcc6d130633ed5db8942257581b55dd">PSA_ERROR_NOT_SUPPORTED</a></td><td><code>alg</code> is not supported or is not a hash algorithm. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="ga65b16ef97d7f650899b7db4b7d1112ff"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_update </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>operation</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">const uint8_t *&#160;</td>
+          <td class="paramname"><em>input</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t&#160;</td>
+          <td class="paramname"><em>input_length</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Add a message fragment to a multipart hash operation.</p>
+<p>The application must call <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a> before calling this function.</p>
+<p>If this function returns an error status, the operation becomes inactive.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir">[in,out]</td><td class="paramname">operation</td><td>Active hash operation. </td></tr>
+    <tr><td class="paramdir">[in]</td><td class="paramname">input</td><td>Buffer containing the message fragment to hash. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">input_length</td><td>Size of the <code>input</code> buffer in bytes.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>Success. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td>The operation state is not valid (not set up, or already completed). </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="ga7be923c5700c9c70ef77ee9b76d1a5c0"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname"><a class="el" href="group__error.html#ga05676e70ba5c6a7565aff3c36677c1f9">psa_status_t</a> psa_hash_verify </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="group__hash.html#ga3c4205d2ce66c4095fc5c78c25273fab">psa_hash_operation_t</a> *&#160;</td>
+          <td class="paramname"><em>operation</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">const uint8_t *&#160;</td>
+          <td class="paramname"><em>hash</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">size_t&#160;</td>
+          <td class="paramname"><em>hash_length</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Finish the calculation of the hash of a message and compare it with an expected value.</p>
+<p>The application must call <a class="el" href="group__hash.html#ga8d72896cf70fc4d514c5c6b978912515">psa_hash_setup()</a> before calling this function. This function calculates the hash of the message formed by concatenating the inputs passed to preceding calls to <a class="el" href="group__hash.html#ga65b16ef97d7f650899b7db4b7d1112ff">psa_hash_update()</a>. It then compares the calculated hash with the expected hash passed as a parameter to this function.</p>
+<p>When this function returns, the operation becomes inactive.</p>
+<dl class="section note"><dt>Note</dt><dd>Implementations shall make the best effort to ensure that the comparison between the actual hash and the expected hash is performed in constant time.</dd></dl>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramdir">[in,out]</td><td class="paramname">operation</td><td>Active hash operation. </td></tr>
+    <tr><td class="paramdir">[in]</td><td class="paramname">hash</td><td>Buffer containing the expected hash value. </td></tr>
+    <tr><td class="paramdir"></td><td class="paramname">hash_length</td><td>Size of the <code>hash</code> buffer in bytes.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="retval"><dt>Return values</dt><dd>
+  <table class="retval">
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga4cc859e2c66ca381c7418db3527a65e1">PSA_SUCCESS</a></td><td>The expected hash is identical to the actual hash of the message. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga35927f755d232c4766de600f2c49e9f2">PSA_ERROR_INVALID_SIGNATURE</a></td><td>The hash of the message was calculated successfully, but it differs from the expected hash. </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga933d40fa2a591004f2e93aa91e11db84">PSA_ERROR_BAD_STATE</a></td><td>The operation state is not valid (not set up, or already completed). </td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga91b2ad8a867517a2651f1b076c5216e5">PSA_ERROR_INSUFFICIENT_MEMORY</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga5cdb6948371d49e916106249020ea3f7">PSA_ERROR_COMMUNICATION_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga08b10e70fa5ff0b05c631d9f8f6b2c6b">PSA_ERROR_HARDWARE_FAILURE</a></td><td></td></tr>
+    <tr><td class="paramname"><a class="el" href="group__error.html#ga2c5dda1485cb54f2385cb9c1279a7004">PSA_ERROR_TAMPERING_DETECTED</a></td><td></td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
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