SSL_CTX_SET_MIN_PROTO_VERSION
Section: OpenSSL (3)
Updated: 2020-07-28
Page Index
NAME
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
SYNOPSIS
#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);
DESCRIPTION
The functions get or set the minimum and maximum supported protocol versions
for the
ctx or
ssl.
This works in combination with the options set via
SSL_CTX_set_options(3) that also make it possible to disable
specific protocol versions.
Use these functions instead of disabling specific protocol versions.
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.
Getters return 0 in case ctx or ssl have been configured to
automatically use the lowest or highest version supported by the library.
Currently supported versions are SSL3_VERSION, TLS1_VERSION,
TLS1_1_VERSION, TLS1_2_VERSION, TLS1_3_VERSION for TLS and
DTLS1_VERSION, DTLS1_2_VERSION for DTLS.
RETURN VALUES
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.
NOTES
All these functions are implemented using macros.
SEE ALSO
SSL_CTX_set_options(3),
SSL_CONF_cmd(3)
HISTORY
The setter functions were added in OpenSSL 1.1.0. The getter functions
were added in OpenSSL 1.1.1.
COPYRIGHT
Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
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
<https://www.openssl.org/source/license.html>.