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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>kcapi_md_setkey</title><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="index.html" title="Linux Kernel Crypto API User Space Interface Library"><link rel="up" href="ch03s11.html" title="Message Digest Cipher API - Generic"><link rel="prev" href="API-kcapi-md-destroy.html" title="kcapi_md_destroy"><link rel="next" href="API-kcapi-md-digestsize.html" title="kcapi_md_digestsize"></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">kcapi_md_setkey</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-kcapi-md-destroy.html">Prev</a> </td><th width="60%" align="center">Message Digest Cipher API - Generic</th><td width="20%" align="right"> <a accesskey="n" href="API-kcapi-md-digestsize.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-kcapi-md-setkey"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>kcapi_md_setkey —
set the key for the message digest handle
</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">kcapi_md_setkey </b>(</code></td><td>struct kcapi_handle * <var class="pdparam">handle</var>, </td></tr><tr><td> </td><td>const uint8_t * <var class="pdparam">key</var>, </td></tr><tr><td> </td><td>uint32_t <var class="pdparam">keylen</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm3002"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>handle</code></em></span></dt><dd><p>
[in] cipher handle
</p></dd><dt><span class="term"><em class="parameter"><code>key</code></em></span></dt><dd><p>
[in] key buffer
</p></dd><dt><span class="term"><em class="parameter"><code>keylen</code></em></span></dt><dd><p>
[in] length of key buffer
</p></dd></dl></div></div><div class="refsect1"><a name="idm3020"></a><h2>Description</h2><p>
With this function, the caller sets the key for subsequent hashing
operations. This call is applicable for keyed message digests.
</p><p>
After the caller provided the key, the caller may securely destroy the key
as it is now maintained by the kernel.
</p><p>
<em class="parameter"><code>return</code></em> 0 upon success;
a negative errno-style error code if an error occurred
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