1SSL_CTX_SET_MIN_PROTO_VERSION(3)    OpenSSL   SSL_CTX_SET_MIN_PROTO_VERSION(3)
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NAME

6       SSL_CTX_set_min_proto_version, SSL_CTX_set_max_proto_version,
7       SSL_CTX_get_min_proto_version, SSL_CTX_get_max_proto_version,
8       SSL_set_min_proto_version, SSL_set_max_proto_version,
9       SSL_get_min_proto_version, SSL_get_max_proto_version - Get and set
10       minimum and maximum supported protocol version
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SYNOPSIS

13        #include <openssl/ssl.h>
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15        int SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version);
16        int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version);
17        int SSL_CTX_get_min_proto_version(SSL_CTX *ctx);
18        int SSL_CTX_get_max_proto_version(SSL_CTX *ctx);
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20        int SSL_set_min_proto_version(SSL *ssl, int version);
21        int SSL_set_max_proto_version(SSL *ssl, int version);
22        int SSL_get_min_proto_version(SSL *ssl);
23        int SSL_get_max_proto_version(SSL *ssl);
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DESCRIPTION

26       The functions get or set the minimum and maximum supported protocol
27       versions for the ctx or ssl.  This works in combination with the
28       options set via SSL_CTX_set_options(3) that also make it possible to
29       disable specific protocol versions.  Use these functions instead of
30       disabling specific protocol versions.
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32       Setting the minimum or maximum version to 0, will enable protocol
33       versions down to the lowest version, or up to the highest version
34       supported by the library, respectively.
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36       Getters return 0 in case ctx or ssl have been configured to
37       automatically use the lowest or highest version supported by the
38       library.
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40       Currently supported versions are SSL3_VERSION, TLS1_VERSION,
41       TLS1_1_VERSION, TLS1_2_VERSION, TLS1_3_VERSION for TLS and
42       DTLS1_VERSION, DTLS1_2_VERSION for DTLS.
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RETURN VALUES

45       These setter functions return 1 on success and 0 on failure. The getter
46       functions return the configured version or 0 for auto-configuration of
47       lowest or highest protocol, respectively.
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NOTES

50       All these functions are implemented using macros.
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SEE ALSO

53       SSL_CTX_set_options(3), SSL_CONF_cmd(3)
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HISTORY

56       The setter functions were added in OpenSSL 1.1.0. The getter functions
57       were added in OpenSSL 1.1.1.
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60       Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
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62       Licensed under the OpenSSL license (the "License").  You may not use
63       this file except in compliance with the License.  You can obtain a copy
64       in the file LICENSE in the source distribution or at
65       <https://www.openssl.org/source/license.html>.
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691.1.1c                            2019-05-28  SSL_CTX_SET_MIN_PROTO_VERSION(3)
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