Updated: 2022/Sep/29

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SSL_CTX_set_min_proto_version(3)    OpenSSL   SSL_CTX_set_min_proto_version(3)



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

LIBRARY
       libcrypto, -lcrypto

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(7), 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 Apache License 2.0 (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>.



3.0.12                            2023-05-07  SSL_CTX_set_min_proto_version(3)