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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>crypto</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <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="#notes">NOTES</a></li> <li><a href="#return_values">RETURN VALUES</a></li> <li><a href="#see_also">SEE ALSO</a></li> <li><a href="#copyright">COPYRIGHT</a></li> </ul> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>crypto - OpenSSL cryptographic library</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <p>See the individual manual pages for details.</p> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>The OpenSSL <strong>crypto</strong> library implements a wide range of cryptographic algorithms used in various Internet standards. The services provided by this library are used by the OpenSSL implementations of SSL, TLS and S/MIME, and they have also been used to implement SSH, OpenPGP, and other cryptographic standards.</p> <p><strong>libcrypto</strong> consists of a number of sub-libraries that implement the individual algorithms.</p> <p>The functionality includes symmetric encryption, public key cryptography and key agreement, certificate handling, cryptographic hash functions, cryptographic pseudo-random number generator, and various utilities.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>Some of the newer functions follow a naming convention using the numbers <strong>0</strong> and <strong>1</strong>. For example the functions:</p> <pre> int X509_CRL_add0_revoked(X509_CRL *crl, X509_REVOKED *rev); int X509_add1_trust_object(X509 *x, const ASN1_OBJECT *obj);</pre> <p>The <strong>0</strong> version uses the supplied structure pointer directly in the parent and it will be freed up when the parent is freed. In the above example <strong>crl</strong> would be freed but <strong>rev</strong> would not.</p> <p>The <strong>1</strong> function uses a copy of the supplied structure pointer (or in some cases increases its link count) in the parent and so both (<strong>x</strong> and <strong>obj</strong> above) should be freed up.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p>See the individual manual pages for details.</p> <p> </p> <hr /> <h1><a name="see_also">SEE ALSO</a></h1> <p><em>openssl(1)</em>, <em>ssl(7)</em></p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2000-2016 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> </body> </html>