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<div class="title">aes_ctr.h File Reference</div> </div>
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<div class="textblock"><code>#include <stdint.h></code><br/>
<code>#include "<a class="el" href="attributes_8h_source.html">attributes.h</a>"</code><br/>
<code>#include "<a class="el" href="libavutil_2version_8h_source.html">version.h</a>"</code><br/>
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<p><a href="aes__ctr_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a97028740606e579d336c51f7523ce2bf"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a97028740606e579d336c51f7523ce2bf">AES_CTR_KEY_SIZE</a>   (16)</td></tr>
<tr class="separator:a97028740606e579d336c51f7523ce2bf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0eb5971619f6b5631a2fe795f046d8d3"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a0eb5971619f6b5631a2fe795f046d8d3">AES_CTR_IV_SIZE</a>   (8)</td></tr>
<tr class="separator:a0eb5971619f6b5631a2fe795f046d8d3"><td class="memSeparator" colspan="2"> </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:a5cdcc3952fe816b7a3333930955bd32b"><td class="memItemLeft" align="right" valign="top">struct AVAESCTR * </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a5cdcc3952fe816b7a3333930955bd32b">av_aes_ctr_alloc</a> (void)</td></tr>
<tr class="memdesc:a5cdcc3952fe816b7a3333930955bd32b"><td class="mdescLeft"> </td><td class="mdescRight">Allocate an AVAESCTR context. <a href="#a5cdcc3952fe816b7a3333930955bd32b">More...</a><br/></td></tr>
<tr class="separator:a5cdcc3952fe816b7a3333930955bd32b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a37ef9fcf05bf94767b2bf18edca7ffda"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a37ef9fcf05bf94767b2bf18edca7ffda">av_aes_ctr_init</a> (struct AVAESCTR *a, const uint8_t *key)</td></tr>
<tr class="memdesc:a37ef9fcf05bf94767b2bf18edca7ffda"><td class="mdescLeft"> </td><td class="mdescRight">Initialize an AVAESCTR context. <a href="#a37ef9fcf05bf94767b2bf18edca7ffda">More...</a><br/></td></tr>
<tr class="separator:a37ef9fcf05bf94767b2bf18edca7ffda"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a651580f87845fc3ba201abeecb5442e6"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a651580f87845fc3ba201abeecb5442e6">av_aes_ctr_free</a> (struct AVAESCTR *a)</td></tr>
<tr class="memdesc:a651580f87845fc3ba201abeecb5442e6"><td class="mdescLeft"> </td><td class="mdescRight">Release an AVAESCTR context. <a href="#a651580f87845fc3ba201abeecb5442e6">More...</a><br/></td></tr>
<tr class="separator:a651580f87845fc3ba201abeecb5442e6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5349eb4f428e432e09617c18195014d8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a5349eb4f428e432e09617c18195014d8">av_aes_ctr_crypt</a> (struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int size)</td></tr>
<tr class="memdesc:a5349eb4f428e432e09617c18195014d8"><td class="mdescLeft"> </td><td class="mdescRight">Process a buffer using a previously initialized context. <a href="#a5349eb4f428e432e09617c18195014d8">More...</a><br/></td></tr>
<tr class="separator:a5349eb4f428e432e09617c18195014d8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a340add2d14d62250a87eee617d786487"><td class="memItemLeft" align="right" valign="top">const uint8_t * </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a340add2d14d62250a87eee617d786487">av_aes_ctr_get_iv</a> (struct AVAESCTR *a)</td></tr>
<tr class="memdesc:a340add2d14d62250a87eee617d786487"><td class="mdescLeft"> </td><td class="mdescRight">Get the current iv. <a href="#a340add2d14d62250a87eee617d786487">More...</a><br/></td></tr>
<tr class="separator:a340add2d14d62250a87eee617d786487"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a93eb462d10972d618f3c7a3a945240eb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a93eb462d10972d618f3c7a3a945240eb">av_aes_ctr_set_random_iv</a> (struct AVAESCTR *a)</td></tr>
<tr class="memdesc:a93eb462d10972d618f3c7a3a945240eb"><td class="mdescLeft"> </td><td class="mdescRight">Generate a random iv. <a href="#a93eb462d10972d618f3c7a3a945240eb">More...</a><br/></td></tr>
<tr class="separator:a93eb462d10972d618f3c7a3a945240eb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a1d5f73ba7cd7ea7c09b21218c39951f9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a1d5f73ba7cd7ea7c09b21218c39951f9">av_aes_ctr_set_iv</a> (struct AVAESCTR *a, const uint8_t *iv)</td></tr>
<tr class="memdesc:a1d5f73ba7cd7ea7c09b21218c39951f9"><td class="mdescLeft"> </td><td class="mdescRight">Forcefully change the iv. <a href="#a1d5f73ba7cd7ea7c09b21218c39951f9">More...</a><br/></td></tr>
<tr class="separator:a1d5f73ba7cd7ea7c09b21218c39951f9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6c61a46cb240ef27f4c8f458255f6152"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="aes__ctr_8h.html#a6c61a46cb240ef27f4c8f458255f6152">av_aes_ctr_increment_iv</a> (struct AVAESCTR *a)</td></tr>
<tr class="memdesc:a6c61a46cb240ef27f4c8f458255f6152"><td class="mdescLeft"> </td><td class="mdescRight">Increment the top 64 bit of the iv (performed after each frame) <a href="#a6c61a46cb240ef27f4c8f458255f6152">More...</a><br/></td></tr>
<tr class="separator:a6c61a46cb240ef27f4c8f458255f6152"><td class="memSeparator" colspan="2"> </td></tr>
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<h2 class="groupheader">Macro Definition Documentation</h2>
<a class="anchor" id="a97028740606e579d336c51f7523ce2bf"></a>
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<td class="memname">#define AES_CTR_KEY_SIZE   (16)</td>
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</table>
</div><div class="memdoc">
<p>Definition at line <a class="el" href="aes__ctr_8h_source.html#l00030">30</a> of file <a class="el" href="aes__ctr_8h_source.html">aes_ctr.h</a>.</p>
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<a class="anchor" id="a0eb5971619f6b5631a2fe795f046d8d3"></a>
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<td class="memname">#define AES_CTR_IV_SIZE   (8)</td>
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</div><div class="memdoc">
<p>Definition at line <a class="el" href="aes__ctr_8h_source.html#l00031">31</a> of file <a class="el" href="aes__ctr_8h_source.html">aes_ctr.h</a>.</p>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="a5cdcc3952fe816b7a3333930955bd32b"></a>
<div class="memitem">
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<td class="memname">struct AVAESCTR* av_aes_ctr_alloc </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Allocate an AVAESCTR context. </p>
</div>
</div>
<a class="anchor" id="a37ef9fcf05bf94767b2bf18edca7ffda"></a>
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<td class="memname">int av_aes_ctr_init </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t * </td>
<td class="paramname"><em>key</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Initialize an AVAESCTR context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>encryption key, must have a length of AES_CTR_KEY_SIZE </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a651580f87845fc3ba201abeecb5442e6"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname">void av_aes_ctr_free </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Release an AVAESCTR context. </p>
</div>
</div>
<a class="anchor" id="a5349eb4f428e432e09617c18195014d8"></a>
<div class="memitem">
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<td class="memname">void av_aes_ctr_crypt </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t * </td>
<td class="paramname"><em>dst</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t * </td>
<td class="paramname"><em>src</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Process a buffer using a previously initialized context. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">dst</td><td>destination array, can be equal to src </td></tr>
<tr><td class="paramname">src</td><td>source array, can be equal to dst </td></tr>
<tr><td class="paramname">size</td><td>the size of src and dst </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a340add2d14d62250a87eee617d786487"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">const uint8_t* av_aes_ctr_get_iv </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the current iv. </p>
</div>
</div>
<a class="anchor" id="a93eb462d10972d618f3c7a3a945240eb"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">void av_aes_ctr_set_random_iv </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Generate a random iv. </p>
</div>
</div>
<a class="anchor" id="a1d5f73ba7cd7ea7c09b21218c39951f9"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">void av_aes_ctr_set_iv </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t * </td>
<td class="paramname"><em>iv</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Forcefully change the iv. </p>
</div>
</div>
<a class="anchor" id="a6c61a46cb240ef27f4c8f458255f6152"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void av_aes_ctr_increment_iv </td>
<td>(</td>
<td class="paramtype">struct AVAESCTR * </td>
<td class="paramname"><em>a</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Increment the top 64 bit of the iv (performed after each frame) </p>
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