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<title>RSA_sign_ASN1_OCTET_STRING</title>
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<ul>
<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="#bugs">BUGS</a></li>
<li><a href="#see_also">SEE ALSO</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
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<h1><a name="name">NAME</a></h1>
<p>RSA_sign_ASN1_OCTET_STRING, RSA_verify_ASN1_OCTET_STRING - RSA signatures</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
#include <openssl/rsa.h></pre>
<pre>
int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
unsigned int m_len, unsigned char *sigret,
unsigned int *siglen, RSA *rsa);</pre>
<pre>
int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
unsigned int m_len, unsigned char *sigbuf,
unsigned int siglen, RSA *rsa);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>RSA_sign_ASN1_OCTET_STRING() signs the octet string <strong>m</strong> of size
<strong>m_len</strong> using the private key <strong>rsa</strong> represented in DER using PKCS #1
padding. It stores the signature in <strong>sigret</strong> and the signature size
in <strong>siglen</strong>. <strong>sigret</strong> must point to <strong>RSA_size(rsa)</strong> bytes of
memory.</p>
<p><strong>dummy</strong> is ignored.</p>
<p>The random number generator must be seeded when calling
RSA_sign_ASN1_OCTET_STRING().
If the automatic seeding or reseeding of the OpenSSL CSPRNG fails due to
external circumstances (see <em>RAND(7)</em>), the operation will fail.</p>
<p>RSA_verify_ASN1_OCTET_STRING() verifies that the signature <strong>sigbuf</strong>
of size <strong>siglen</strong> is the DER representation of a given octet string
<strong>m</strong> of size <strong>m_len</strong>. <strong>dummy</strong> is ignored. <strong>rsa</strong> is the signer's
public key.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p>RSA_sign_ASN1_OCTET_STRING() returns 1 on success, 0 otherwise.
RSA_verify_ASN1_OCTET_STRING() returns 1 on successful verification, 0
otherwise.</p>
<p>The error codes can be obtained by <em>ERR_get_error(3)</em>.</p>
<p>
</p>
<hr />
<h1><a name="bugs">BUGS</a></h1>
<p>These functions serve no recognizable purpose.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>ERR_get_error(3)</em>,
<em>RAND_bytes(3)</em>, <em>RSA_sign(3)</em>,
<em>RSA_verify(3)</em>,
<em>RAND(7)</em></p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (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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