88 lines
2.8 KiB
HTML
Executable File
88 lines
2.8 KiB
HTML
Executable File
<?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>DSA_do_sign</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:root@localhost" />
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</head>
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<body style="background-color: white">
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<!-- INDEX BEGIN -->
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<div name="index">
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<p><a name="__index__"></a></p>
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<ul>
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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="#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="#copyright">COPYRIGHT</a></li>
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</ul>
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<hr name="index" />
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</div>
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<!-- INDEX END -->
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<p>
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</p>
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<hr />
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<h1><a name="name">NAME</a></h1>
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<p>DSA_do_sign, DSA_do_verify - raw DSA signature operations</p>
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<p>
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</p>
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<hr />
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<h1><a name="synopsis">SYNOPSIS</a></h1>
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<pre>
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#include <openssl/dsa.h></pre>
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<pre>
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DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);</pre>
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<pre>
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int DSA_do_verify(const unsigned char *dgst, int dgst_len,
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DSA_SIG *sig, DSA *dsa);</pre>
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<p>
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</p>
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<hr />
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<h1><a name="description">DESCRIPTION</a></h1>
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<p><code>DSA_do_sign()</code> computes a digital signature on the <strong>len</strong> byte message
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digest <strong>dgst</strong> using the private key <strong>dsa</strong> and returns it in a
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newly allocated <strong>DSA_SIG</strong> structure.</p>
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<p><em>DSA_sign_setup(3)</em> may be used to precompute part
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of the signing operation in case signature generation is
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time-critical.</p>
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<p><code>DSA_do_verify()</code> verifies that the signature <strong>sig</strong> matches a given
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message digest <strong>dgst</strong> of size <strong>len</strong>. <strong>dsa</strong> is the signer's public
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key.</p>
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<p>
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</p>
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<hr />
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<h1><a name="return_values">RETURN VALUES</a></h1>
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<p><code>DSA_do_sign()</code> returns the signature, NULL on error. <code>DSA_do_verify()</code>
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returns 1 for a valid signature, 0 for an incorrect signature and -1
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on error. The error codes can be obtained by
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<em>ERR_get_error(3)</em>.</p>
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<p>
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</p>
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<hr />
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<h1><a name="see_also">SEE ALSO</a></h1>
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<p><em>DSA_new(3)</em>, <em>ERR_get_error(3)</em>, <em>RAND_bytes(3)</em>,
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<em>DSA_SIG_new(3)</em>,
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<em>DSA_sign(3)</em></p>
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<p>
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</p>
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<hr />
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<h1><a name="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2000-2016 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
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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<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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