1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>crypto_ahash_export</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="ch05s11.html" title="Asynchronous Message Digest API"><link rel="prev" href="API-crypto-ahash-digest.html" title="crypto_ahash_digest"><link rel="next" href="API-crypto-ahash-import.html" title="crypto_ahash_import"></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_ahash_export</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-crypto-ahash-digest.html">Prev</a>&#160;</td><th width="60%" align="center">Asynchronous Message Digest API</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-crypto-ahash-import.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-crypto-ahash-export"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>crypto_ahash_export &#8212; 
2  extract current message digest state
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">int <b class="fsfunc">crypto_ahash_export </b>(</code></td><td>struct ahash_request * <var class="pdparam">req</var>, </td></tr><tr><td>&#160;</td><td>void * <var class="pdparam">out</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1098177028"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>req</code></em></span></dt><dd><p>
4     reference to the ahash_request handle whose state is exported
5    </p></dd><dt><span class="term"><em class="parameter"><code>out</code></em></span></dt><dd><p>
6     output buffer of sufficient size that can hold the hash state
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1098179668"></a><h2>Description</h2><p>
8   This function exports the hash state of the ahash_request handle into the
9   caller-allocated output buffer out which must have sufficient size (e.g. by
10   calling crypto_ahash_reqsize).
11</p></div><div class="refsect1"><a name="idp1098180444"></a><h2>Return</h2><p>
12   0 if the export was successful; &lt; 0 if an error occurred
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