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| <div class="section" id="psa-crypto-library"> |
| <h1>8.2. PSA Crypto library</h1> |
| <div class="section" id="api-version"> |
| <span id="id1"></span><h2>8.2.1. API version</h2> |
| <div class="section" id="PSA_CRYPTO_API_VERSION_MAJOR"> |
| <span id="c.PSA_CRYPTO_API_VERSION_MAJOR"></span><h3><code class="docutils literal"><span class="pre">PSA_CRYPTO_API_VERSION_MAJOR</span></code> (macro)</h3> |
| <p>The major version of this implementation of the PSA Crypto API.</p> |
| <pre class="literal-block"> |
| #define <a class="reference internal" href="#c.PSA_CRYPTO_API_VERSION_MAJOR" title="PSA_CRYPTO_API_VERSION_MAJOR">PSA_CRYPTO_API_VERSION_MAJOR</a> 1 |
| </pre> |
| </div> |
| <div class="section" id="PSA_CRYPTO_API_VERSION_MINOR"> |
| <span id="c.PSA_CRYPTO_API_VERSION_MINOR"></span><h3><code class="docutils literal"><span class="pre">PSA_CRYPTO_API_VERSION_MINOR</span></code> (macro)</h3> |
| <p>The minor version of this implementation of the PSA Crypto API.</p> |
| <pre class="literal-block"> |
| #define <a class="reference internal" href="#c.PSA_CRYPTO_API_VERSION_MINOR" title="PSA_CRYPTO_API_VERSION_MINOR">PSA_CRYPTO_API_VERSION_MINOR</a> 1 |
| </pre> |
| </div> |
| </div> |
| <div class="section" id="library-initialization"> |
| <span id="library-init"></span><h2>8.2.2. Library initialization</h2> |
| <div class="section" id="psa_crypto_init"> |
| <span id="c.psa_crypto_init"></span><h3><code class="docutils literal"><span class="pre">psa_crypto_init</span></code> (function)</h3> |
| <p>Library initialization.</p> |
| <pre class="literal-block"> |
| <a class="reference internal" href="status.html#c.psa_status_t" title="psa_status_t">psa_status_t</a> <a class="reference internal" href="#c.psa_crypto_init" title="psa_crypto_init">psa_crypto_init</a>(void); |
| </pre> |
| <p class="rubric">Returns: <a class="reference internal" href="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="status.html#c.PSA_SUCCESS" title="PSA_SUCCESS"><code class="docutils literal"><span class="pre">PSA_SUCCESS</span></code></a></dt> |
| <dd>Success.</dd> |
| <dt> <a class="reference internal" href="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="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="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="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> |
| </dl> |
| <p class="rubric">Description</p> |
| <p>It is recommended that applications call this function before calling any other function in this module.</p> |
| <p>Applications are permitted to call this function more than once. Once a call succeeds, subsequent calls are guaranteed to succeed.</p> |
| <p>If the application calls any function that returns a <a class="reference internal" href="status.html#c.psa_status_t" title="psa_status_t"><code class="xref any c c-type docutils literal"><span class="pre">psa_status_t</span></code></a> result code before calling <a class="reference internal" href="#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>, the following will occur:</p> |
| <ul class="simple"> |
| <li>If initialization of the library is essential for secure operation of the function, the implementation must return <a class="reference internal" href="status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a> or other appropriate error.</li> |
| <li>If failure to initialize the library does not compromise the security of the function, the implementation must either provide the expected result for the function, or return <a class="reference internal" href="status.html#c.PSA_ERROR_BAD_STATE" title="PSA_ERROR_BAD_STATE"><code class="xref any c c-macro docutils literal"><span class="pre">PSA_ERROR_BAD_STATE</span></code></a> or other appropriate error.</li> |
| </ul> |
| <div class="admonition note"> |
| <p class="first admonition-title">Note</p> |
| <p>The following scenarios are examples where an implementation can require that the library has been initialized by calling <a class="reference internal" href="#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>:</p> |
| <ul class="last simple"> |
| <li>A client-server implementation, in which <a class="reference internal" href="#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> establishes the communication with the server. No key management or cryptographic operation can be performed until this is done.</li> |
| <li>An implementation in which <a class="reference internal" href="#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> initializes the random bit generator, and no operations that require the RNG can be performed until this is done. For example, random data, key, IV, or nonce generation; randomized signature or encryption; and algorithms that are implemented with blinding.</li> |
| </ul> |
| </div> |
| <div class="admonition warning"> |
| <p class="first admonition-title">Warning</p> |
| <p class="last">The set of functions that depend on successful initialization of the library is <a class="reference internal" href="../../about.html#term-implementation-defined"><span class="scterm">IMPLEMENTATION DEFINED</span></a>. Applications that rely on calling functions before initializing the library might not be portable to other implementations.</p> |
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| IHI 0086<br/> |
| Non-confidential<br/> |
| Version 1.1.0 |
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| <ul class="current"> |
| <li class="toctree-l1"><a class="reference internal" href="../../overview/intro.html">1. Introduction</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../overview/goals.html">2. Design goals</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../overview/functionality.html">3. Functionality overview</a></li> |
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| <li class="toctree-l1 current"><a class="reference internal" href="index.html">8. Library management reference</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="status.html">8.1. PSA status codes</a></li> |
| <li class="toctree-l2 current"><a class="current reference internal" href="#">8.2. PSA Crypto library</a><ul> |
| <li class="toctree-l3"><a class="reference internal" href="#api-version">8.2.1. API version</a></li> |
| <li class="toctree-l3"><a class="reference internal" href="#library-initialization">8.2.2. Library initialization</a></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="../keys/index.html">9. Key management reference</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../ops/index.html">10. Cryptographic operation reference</a></li> |
| </ul> |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="../../appendix/example_header.html">Example header file</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../appendix/encodings.html">Algorithm and key type encoding</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../appendix/specdef_values.html">Example macro implementations</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../appendix/sra.html">Security Risk Assessment</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../../appendix/history.html">Changes to the API</a></li> |
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