1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>crypto_cipher_decrypt_one</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Kernel Crypto API"><link rel="up" href="ch05s08.html" title="Single Block Cipher API"><link rel="prev" href="API-crypto-cipher-encrypt-one.html" title="crypto_cipher_encrypt_one"><link rel="next" href="ch05s09.html" title="Synchronous Message Digest API"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">crypto_cipher_decrypt_one</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-crypto-cipher-encrypt-one.html">Prev</a>&#160;</td><th width="60%" align="center">Single Block Cipher API</th><td width="20%" align="right">&#160;<a accesskey="n" href="ch05s09.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-crypto-cipher-decrypt-one"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>crypto_cipher_decrypt_one &#8212; 
2  decrypt one block of ciphertext
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <b class="fsfunc">crypto_cipher_decrypt_one </b>(</code></td><td>struct crypto_cipher * <var class="pdparam">tfm</var>, </td></tr><tr><td>&#160;</td><td>u8 * <var class="pdparam">dst</var>, </td></tr><tr><td>&#160;</td><td>const u8 * <var class="pdparam">src</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1097954468"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>tfm</code></em></span></dt><dd><p>
4     cipher handle
5    </p></dd><dt><span class="term"><em class="parameter"><code>dst</code></em></span></dt><dd><p>
6     points to the buffer that will be filled with the plaintext
7    </p></dd><dt><span class="term"><em class="parameter"><code>src</code></em></span></dt><dd><p>
8     buffer holding the ciphertext to be decrypted
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1097958044"></a><h2>Description</h2><p>
10   Invoke the decryption operation of one block. The caller must ensure that
11   the plaintext and ciphertext buffers are at least one block in size.
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