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<title>libwebsockets: SHA and B64 helpers</title>
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<div id="projectname">libwebsockets
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<div id="projectbrief">Lightweight C library for HTML5 websockets</div>
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<a href="#func-members">Functions</a> </div>
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<div class="title">SHA and B64 helpers</div> </div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga7b09ab74646266f0b555103b3bb8dfe5"><td class="memItemLeft" align="right" valign="top">LWS_VISIBLE LWS_EXTERN unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__sha.html#ga7b09ab74646266f0b555103b3bb8dfe5">lws_SHA1</a> (const unsigned char *d, size_t n, unsigned char *md)</td></tr>
<tr class="separator:ga7b09ab74646266f0b555103b3bb8dfe5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf39765e4a3b413efb65e4698b2ec3575"><td class="memItemLeft" align="right" valign="top">LWS_VISIBLE LWS_EXTERN int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__sha.html#gaf39765e4a3b413efb65e4698b2ec3575">lws_b64_encode_string</a> (const char *in, int in_len, char *out, int out_size)</td></tr>
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<tr class="memitem:ga66316e6a5a0644a09d5a10e919dfdd8d"><td class="memItemLeft" align="right" valign="top">LWS_VISIBLE LWS_EXTERN int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__sha.html#ga66316e6a5a0644a09d5a10e919dfdd8d">lws_b64_decode_string</a> (const char *in, char *out, int out_size)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2>SHA and B64 helpers</h2>
<p>These provide SHA-1 and B64 helper apis </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga66316e6a5a0644a09d5a10e919dfdd8d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga66316e6a5a0644a09d5a10e919dfdd8d">§ </a></span>lws_b64_decode_string()</h2>
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<td class="memname">LWS_VISIBLE LWS_EXTERN int lws_b64_decode_string </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>in</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char * </td>
<td class="paramname"><em>out</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>out_size</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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</div><div class="memdoc">
<p><code>#include <<a class="el" href="libwebsockets_8h.html">lib/libwebsockets.h</a>></code></p>
<p><a class="el" href="group__sha.html#ga66316e6a5a0644a09d5a10e919dfdd8d">lws_b64_decode_string()</a>: decode a string from base 64</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">in</td><td>incoming buffer </td></tr>
<tr><td class="paramname">out</td><td>result buffer </td></tr>
<tr><td class="paramname">out_size</td><td>length of result buffer</td></tr>
</table>
</dd>
</dl>
<p>Decodes a string using b64 </p>
</div>
</div>
<a id="gaf39765e4a3b413efb65e4698b2ec3575"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaf39765e4a3b413efb65e4698b2ec3575">§ </a></span>lws_b64_encode_string()</h2>
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<td class="memname">LWS_VISIBLE LWS_EXTERN int lws_b64_encode_string </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>in</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>in_len</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">char * </td>
<td class="paramname"><em>out</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>out_size</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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</div><div class="memdoc">
<p><code>#include <<a class="el" href="libwebsockets_8h.html">lib/libwebsockets.h</a>></code></p>
<p><a class="el" href="group__sha.html#gaf39765e4a3b413efb65e4698b2ec3575">lws_b64_encode_string()</a>: encode a string into base 64</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">in</td><td>incoming buffer </td></tr>
<tr><td class="paramname">in_len</td><td>length of incoming buffer </td></tr>
<tr><td class="paramname">out</td><td>result buffer </td></tr>
<tr><td class="paramname">out_size</td><td>length of result buffer</td></tr>
</table>
</dd>
</dl>
<p>Encodes a string using b64 </p>
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</div>
<a id="ga7b09ab74646266f0b555103b3bb8dfe5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga7b09ab74646266f0b555103b3bb8dfe5">§ </a></span>lws_SHA1()</h2>
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<td class="memname">LWS_VISIBLE LWS_EXTERN unsigned char* lws_SHA1 </td>
<td>(</td>
<td class="paramtype">const unsigned char * </td>
<td class="paramname"><em>d</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>n</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned char * </td>
<td class="paramname"><em>md</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p><code>#include <<a class="el" href="libwebsockets_8h.html">lib/libwebsockets.h</a>></code></p>
<p><a class="el" href="group__sha.html#ga7b09ab74646266f0b555103b3bb8dfe5">lws_SHA1()</a>: make a SHA-1 digest of a buffer</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">d</td><td>incoming buffer </td></tr>
<tr><td class="paramname">n</td><td>length of incoming buffer </td></tr>
<tr><td class="paramname">md</td><td>buffer for message digest (must be >= 20 bytes)</td></tr>
</table>
</dd>
</dl>
<p>Reduces any size buffer into a 20-byte SHA-1 hash. </p>
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