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<p>AES/CMAC helpers.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="aes_8hpp_source.html">nfc/crypto/aes.hpp</a>&quot;</code><br />
<code>#include &lt;M5Utility.hpp&gt;</code><br />
<code>#include &lt;cstring&gt;</code><br />
<code>#include &lt;mbedtls/aes.h&gt;</code><br />
</div><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="namespaces" name="namespaces"></a>
Namespaces</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacem5.html">m5</a></td></tr>
<tr class="memdesc:namespacem5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Top level namespace of M5stack. <br /></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a3be0738c24fac6d2216486db30bb064c" id="r_a3be0738c24fac6d2216486db30bb064c"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a3be0738c24fac6d2216486db30bb064c">m5::nfc::crypto::aes_ecb_encrypt</a> (uint8_t out[16], const uint8_t key[16], const uint8_t in[16])</td></tr>
<tr class="memdesc:a3be0738c24fac6d2216486db30bb064c"><td class="mdescLeft">&#160;</td><td class="mdescRight">AES-128 ECB encryption of a single 16-byte block. <br /></td></tr>
<tr class="separator:a3be0738c24fac6d2216486db30bb064c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad26d67e84a0c1c2ae9d4c027d8c2d66a" id="r_ad26d67e84a0c1c2ae9d4c027d8c2d66a"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ad26d67e84a0c1c2ae9d4c027d8c2d66a">m5::nfc::crypto::aes_cbc_crypt</a> (uint8_t *out, const uint8_t key[16], const uint8_t iv_in[16], const uint8_t *in, size_t len, bool encrypt)</td></tr>
<tr class="memdesc:ad26d67e84a0c1c2ae9d4c027d8c2d66a"><td class="mdescLeft">&#160;</td><td class="mdescRight">AES-128 CBC encrypt or decrypt. <br /></td></tr>
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<tr class="memdesc:a66b0e9249a6eb7b35e20d249ead7c9bf"><td class="mdescLeft">&#160;</td><td class="mdescRight">Generate AES-CMAC subkeys K1 and K2. <br /></td></tr>
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<tr class="memdesc:a5431d20eb1034f57fe7aecefc43c30ce"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate AES-CMAC (RFC 4493) <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>AES/CMAC helpers. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="ad26d67e84a0c1c2ae9d4c027d8c2d66a" name="ad26d67e84a0c1c2ae9d4c027d8c2d66a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad26d67e84a0c1c2ae9d4c027d8c2d66a">&#9670;&#160;</a></span>aes_cbc_crypt()</h2>
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<table class="memname">
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<td class="memname">bool m5::nfc::crypto::aes_cbc_crypt </td>
<td>(</td>
<td class="paramtype">uint8_t *</td> <td class="paramname"><span class="paramname"><em>out</em></span>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t</td> <td class="paramname"><span class="paramname"><em>key</em></span>[16], </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t</td> <td class="paramname"><span class="paramname"><em>iv_in</em></span>[16], </td>
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<td class="paramkey"></td>
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<td class="paramtype">const uint8_t *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">size_t</td> <td class="paramname"><span class="paramname"><em>len</em></span>, </td>
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<td class="paramtype">bool</td> <td class="paramname"><span class="paramname"><em>encrypt</em></span>&#160;)</td>
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<p>AES-128 CBC encrypt or decrypt. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">out</td><td>Output buffer (same size as in) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">key</td><td>AES-128 key (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">iv_in</td><td>Initialization vector (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">in</td><td>Input buffer </td></tr>
<tr><td class="paramdir"></td><td class="paramname">len</td><td>Input buffer length (must be multiple of 16) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">encrypt</td><td>True for encrypt, false for decrypt </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>True if successful </dd></dl>
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</div>
<a id="a3be0738c24fac6d2216486db30bb064c" name="a3be0738c24fac6d2216486db30bb064c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a3be0738c24fac6d2216486db30bb064c">&#9670;&#160;</a></span>aes_ecb_encrypt()</h2>
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<td class="memname">bool m5::nfc::crypto::aes_ecb_encrypt </td>
<td>(</td>
<td class="paramtype">uint8_t</td> <td class="paramname"><span class="paramname"><em>out</em></span>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t</td> <td class="paramname"><span class="paramname"><em>key</em></span>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t</td> <td class="paramname"><span class="paramname"><em>in</em></span>[16]&#160;)</td>
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<p>AES-128 ECB encryption of a single 16-byte block. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">out</td><td>Encrypted output (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">key</td><td>AES-128 key (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">in</td><td>Plaintext input (16 bytes) </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>True if successful </dd></dl>
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<a id="a5431d20eb1034f57fe7aecefc43c30ce" name="a5431d20eb1034f57fe7aecefc43c30ce"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5431d20eb1034f57fe7aecefc43c30ce">&#9670;&#160;</a></span>cmac_aes_128()</h2>
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<td class="memname">bool m5::nfc::crypto::cmac_aes_128 </td>
<td>(</td>
<td class="paramtype">uint8_t</td> <td class="paramname"><span class="paramname"><em>out</em></span>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t</td> <td class="paramname"><span class="paramname"><em>key</em></span>[16], </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t *</td> <td class="paramname"><span class="paramname"><em>msg</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">size_t</td> <td class="paramname"><span class="paramname"><em>msg_len</em></span>&#160;)</td>
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<p>Calculate AES-CMAC (RFC 4493) </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">out</td><td>CMAC output (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">key</td><td>AES-128 key (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">msg</td><td>Message buffer </td></tr>
<tr><td class="paramdir"></td><td class="paramname">msg_len</td><td>Message length </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>True if successful </dd></dl>
</div>
</div>
<a id="a66b0e9249a6eb7b35e20d249ead7c9bf" name="a66b0e9249a6eb7b35e20d249ead7c9bf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a66b0e9249a6eb7b35e20d249ead7c9bf">&#9670;&#160;</a></span>cmac_subkeys()</h2>
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<div class="memproto">
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<td class="memname">bool m5::nfc::crypto::cmac_subkeys </td>
<td>(</td>
<td class="paramtype">uint8_t</td> <td class="paramname"><span class="paramname"><em>k1</em></span>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t</td> <td class="paramname"><span class="paramname"><em>k2</em></span>[16], </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t</td> <td class="paramname"><span class="paramname"><em>key</em></span>[16]&#160;)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Generate AES-CMAC subkeys K1 and K2. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">k1</td><td>Subkey K1 (16 bytes) </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">k2</td><td>Subkey K2 (16 bytes) </td></tr>
<tr><td class="paramdir"></td><td class="paramname">key</td><td>AES-128 key (16 bytes) </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>True if successful </dd></dl>
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