73 lines
3.2 KiB
HTML
73 lines
3.2 KiB
HTML
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<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>CMS_final</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:" />
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</head>
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<body>
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<ul id="index">
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<li><a href="#NAME">NAME</a></li>
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<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#NOTES">NOTES</a></li>
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<li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
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<li><a href="#SEE-ALSO">SEE ALSO</a></li>
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<li><a href="#HISTORY">HISTORY</a></li>
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<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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</ul>
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<h1 id="NAME">NAME</h1>
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<p>CMS_final, CMS_final_digest - finalise a CMS_ContentInfo structure</p>
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<h1 id="SYNOPSIS">SYNOPSIS</h1>
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<pre><code> #include <openssl/cms.h>
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int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags);
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int CMS_final_digest(CMS_ContentInfo *cms, const unsigned char *md,
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unsigned int mdlen, BIO *dcont, unsigned int flags);</code></pre>
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<h1 id="DESCRIPTION">DESCRIPTION</h1>
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<p>CMS_final() finalises the structure <b>cms</b>. Its purpose is to perform any operations necessary on <b>cms</b> (digest computation for example) and set the appropriate fields. The parameter <b>data</b> contains the content to be processed. The <b>dcont</b> parameter contains a BIO to write content to after processing: this is only used with detached data and will usually be set to NULL.</p>
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<p>CMS_final_digest() finalises the structure <b>cms</b> using a pre-computed digest, rather than computing the digest from the original data.</p>
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<h1 id="NOTES">NOTES</h1>
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<p>These functions will normally be called when the <b>CMS_PARTIAL</b> flag is used. It should only be used when streaming is not performed because the streaming I/O functions perform finalisation operations internally.</p>
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<p>To sign a pre-computed digest, <a href="../man3/CMS_sign.html">CMS_sign(3)</a> or CMS_sign_ex() is called with the <b>data</b> parameter set to NULL before the CMS structure is finalised with the digest provided to CMS_final_digest() in binary form. When signing a pre-computed digest, the security relies on the digest and its computation from the original message being trusted.</p>
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<h1 id="RETURN-VALUES">RETURN VALUES</h1>
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<p>CMS_final() and CMS_final_digest() return 1 for success or 0 for failure.</p>
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<h1 id="SEE-ALSO">SEE ALSO</h1>
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<p><a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man3/CMS_sign.html">CMS_sign(3)</a>, <a href="../man3/CMS_encrypt.html">CMS_encrypt(3)</a></p>
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<h1 id="HISTORY">HISTORY</h1>
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<p>CMS_final_digest() was added in OpenSSL 3.2.</p>
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<h1 id="COPYRIGHT">COPYRIGHT</h1>
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<p>Copyright 2008-2022 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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