diff --git a/library/pk.c b/library/pk.c
index e0e8dba..cb6e158 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -139,6 +139,29 @@
     return( 0 );
 }
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+/*
+ * Initialise a PSA-wrapping context
+ */
+int mbedtls_pk_setup_psa( mbedtls_pk_context *ctx, const psa_key_slot_t key )
+{
+    const mbedtls_pk_info_t * const info = &mbedtls_pk_opaque_psa_info;
+
+    if( ctx == NULL || ctx->pk_info != NULL )
+        return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
+
+    if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
+        return( MBEDTLS_ERR_PK_ALLOC_FAILED );
+
+    /* coming soon: remember key */
+    (void) key;
+
+    ctx->pk_info = info;
+
+    return( 0 );
+}
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
 #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
 /*
  * Initialize an RSA-alt context
diff --git a/library/pk_wrap.c b/library/pk_wrap.c
index 87806be..4885c49 100644
--- a/library/pk_wrap.c
+++ b/library/pk_wrap.c
@@ -716,4 +716,31 @@
 
 #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+
+const mbedtls_pk_info_t mbedtls_pk_opaque_psa_info = {
+    MBEDTLS_PK_OPAQUE_PSA,
+    "Opaque (PSA)",
+    NULL, /* coming soon: bitlen */
+    NULL, /* coming soon: can_do */
+    NULL, /* verify - will be done later */
+    NULL, /* coming soon: sign */
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+    NULL, /* restartable verify - not relevant */
+    NULL, /* restartable sign - not relevant */
+#endif
+    NULL, /* decrypt - will be done later */
+    NULL, /* encrypt - will be done later */
+    NULL, /* check_pair - could be done later or left NULL */
+    NULL, /* coming soon: alloc */
+    NULL, /* coming soon: free */
+#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
+    NULL, /* restart alloc - not relevant */
+    NULL, /* restart free - not relevant */
+#endif
+    NULL, /* debug - could be done later, or even left NULL */
+};
+
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
 #endif /* MBEDTLS_PK_C */