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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@localhost" /> </head> <body> <ul id="index"> <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> <h1 id="NAME">NAME</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> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/ssl.h> 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); 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);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>The functions get or set the minimum and maximum supported protocol versions for the <b>ctx</b> or <b>ssl</b>. This works in combination with the options set via <a href="../man3/SSL_CTX_set_options.html">SSL_CTX_set_options(3)</a> 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 <b>ctx</b> or <b>ssl</b> have been configured to automatically use the lowest or highest version supported by the library.</p> <p>Currently supported versions are <b>SSL3_VERSION</b>, <b>TLS1_VERSION</b>, <b>TLS1_1_VERSION</b>, <b>TLS1_2_VERSION</b>, <b>TLS1_3_VERSION</b> for TLS and <b>DTLS1_VERSION</b>, <b>DTLS1_2_VERSION</b> for DTLS.</p> <h1 id="RETURN-VALUES">RETURN VALUES</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> <h1 id="NOTES">NOTES</h1> <p>All these functions are implemented using macros.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/SSL_CTX_set_options.html">SSL_CTX_set_options(3)</a>, <a href="../man3/SSL_CONF_cmd.html">SSL_CONF_cmd(3)</a></p> <h1 id="HISTORY">HISTORY</h1> <p>The setter functions were added in OpenSSL 1.1.0. The getter functions were added in OpenSSL 1.1.1.</p> <h1 id="COPYRIGHT">COPYRIGHT</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>