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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>SSL_CTX_set_min_proto_version</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="#return_values">RETURN VALUES</a></li> <li><a href="#notes">NOTES</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> </ul> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>SSL_CTX_set_min_proto_version, SSL_CTX_set_max_proto_version, SSL_CTX_get_min_proto_version, SSL_CTX_get_max_proto_version, SSL_set_min_proto_version, SSL_set_max_proto_version, SSL_get_min_proto_version, SSL_get_max_proto_version - Get and set minimum and maximum supported protocol version</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/ssl.h></pre> <pre> int SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version); int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version); int SSL_CTX_get_min_proto_version(SSL_CTX *ctx); int SSL_CTX_get_max_proto_version(SSL_CTX *ctx);</pre> <pre> int SSL_set_min_proto_version(SSL *ssl, int version); int SSL_set_max_proto_version(SSL *ssl, int version); int SSL_get_min_proto_version(SSL *ssl); int SSL_get_max_proto_version(SSL *ssl);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>The functions get or set the minimum and maximum supported protocol versions for the <strong>ctx</strong> or <strong>ssl</strong>. This works in combination with the options set via <em>SSL_CTX_set_options(3)</em> that also make it possible to disable specific protocol versions. Use these functions instead of disabling specific protocol versions.</p> <p>Setting the minimum or maximum version to 0, will enable protocol versions down to the lowest version, or up to the highest version supported by the library, respectively.</p> <p>Getters return 0 in case <strong>ctx</strong> or <strong>ssl</strong> have been configured to automatically use the lowest or highest version supported by the library.</p> <p>Currently supported versions are <strong>SSL3_VERSION</strong>, <strong>TLS1_VERSION</strong>, <strong>TLS1_1_VERSION</strong>, <strong>TLS1_2_VERSION</strong>, <strong>TLS1_3_VERSION</strong> for TLS and <strong>DTLS1_VERSION</strong>, <strong>DTLS1_2_VERSION</strong> for DTLS.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p>These setter functions return 1 on success and 0 on failure. The getter functions return the configured version or 0 for auto-configuration of lowest or highest protocol, respectively.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>All these functions are implemented using macros.</p> <p> </p> <hr /> <h1><a name="see_also">SEE ALSO</a></h1> <p><em>SSL_CTX_set_options(3)</em>, <em>SSL_CONF_cmd(3)</em></p> <p> </p> <hr /> <h1><a name="history">HISTORY</a></h1> <p>The setter functions were added in OpenSSL 1.1.0. The getter functions were added in OpenSSL 1.1.1.</p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2016-2019 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> </body> </html>