openssl-prebuild/linux_amd64/ssl/share/doc/openssl/html/man3/DSA_size.html
2020-03-02 16:50:34 +00:00

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<title>DSA_size</title>
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<li><a href="#name">NAME</a></li>
<li><a href="#synopsis">SYNOPSIS</a></li>
<li><a href="#description">DESCRIPTION</a></li>
<li><a href="#return_values">RETURN VALUES</a></li>
<li><a href="#see_also">SEE ALSO</a></li>
<li><a href="#history">HISTORY</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
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<h1><a name="name">NAME</a></h1>
<p>DSA_size, DSA_bits, DSA_security_bits - get DSA signature size, key bits or security bits</p>
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</p>
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<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
#include &lt;openssl/dsa.h&gt;</pre>
<p>Deprecated since OpenSSL 3.0, can be hidden entirely by defining
<strong>OPENSSL_API_COMPAT</strong> with a suitable version value, see
<em>openssl_user_macros(7)</em>:</p>
<pre>
int DSA_size(const DSA *dsa);
int DSA_bits(const DSA *dsa);
int DSA_security_bits(const DSA *dsa);</pre>
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<h1><a name="description">DESCRIPTION</a></h1>
<p>All of the functions described on this page are deprecated.
Applications should instead use <em>EVP_PKEY_bits(3)</em>,
<em>EVP_PKEY_security_bits(3)</em> and <em>EVP_PKEY_size(3)</em>.</p>
<p><code>DSA_size()</code> returns the maximum size of an ASN.1 encoded DSA signature
for key <strong>dsa</strong> in bytes. It can be used to determine how much memory must
be allocated for a DSA signature.</p>
<p><strong>dsa-&gt;q</strong> must not be <strong>NULL</strong>.</p>
<p><code>DSA_bits()</code> returns the number of bits in key <strong>dsa</strong>: this is the number
of bits in the <strong>p</strong> parameter.</p>
<p><code>DSA_security_bits()</code> returns the number of security bits of the given <strong>dsa</strong>
key. See <em>BN_security_bits(3)</em>.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p><code>DSA_size()</code> returns the signature size in bytes.</p>
<p><code>DSA_bits()</code> returns the number of bits in the key.</p>
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</p>
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<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>EVP_PKEY_bits(3)</em>,
<em>EVP_PKEY_security_bits(3)</em>,
<em>EVP_PKEY_size(3)</em>,
<em>DSA_new(3)</em>, <em>DSA_sign(3)</em></p>
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</p>
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<h1><a name="history">HISTORY</a></h1>
<p>All of these functions were deprecated in OpenSSL 3.0.</p>
<p>
</p>
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<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the Apache License 2.0 (the &quot;License&quot;). 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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