74 lines
2.3 KiB
Plaintext
74 lines
2.3 KiB
Plaintext
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=pod
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=head1 NAME
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SSL_CTX_set_min_proto_version, SSL_CTX_set_max_proto_version,
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SSL_CTX_get_min_proto_version, SSL_CTX_get_max_proto_version,
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SSL_set_min_proto_version, SSL_set_max_proto_version,
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SSL_get_min_proto_version, SSL_get_max_proto_version - Get and set minimum
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and maximum supported protocol version
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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int SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version);
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int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version);
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int SSL_CTX_get_min_proto_version(SSL_CTX *ctx);
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int SSL_CTX_get_max_proto_version(SSL_CTX *ctx);
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int SSL_set_min_proto_version(SSL *ssl, int version);
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int SSL_set_max_proto_version(SSL *ssl, int version);
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int SSL_get_min_proto_version(SSL *ssl);
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int SSL_get_max_proto_version(SSL *ssl);
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=head1 DESCRIPTION
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The functions get or set the minimum and maximum supported protocol versions
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for the B<ctx> or B<ssl>.
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This works in combination with the options set via
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L<SSL_CTX_set_options(3)> that also make it possible to disable
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specific protocol versions.
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Use these functions instead of disabling specific protocol versions.
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Setting the minimum or maximum version to 0, will enable protocol
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versions down to the lowest version, or up to the highest version
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supported by the library, respectively.
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Getters return 0 in case B<ctx> or B<ssl> have been configured to
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automatically use the lowest or highest version supported by the library.
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Currently supported versions are B<SSL3_VERSION>, B<TLS1_VERSION>,
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B<TLS1_1_VERSION>, B<TLS1_2_VERSION>, B<TLS1_3_VERSION> for TLS and
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B<DTLS1_VERSION>, B<DTLS1_2_VERSION> for DTLS.
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=head1 RETURN VALUES
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These setter functions return 1 on success and 0 on failure. The getter
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functions return the configured version or 0 for auto-configuration of
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lowest or highest protocol, respectively.
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=head1 NOTES
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All these functions are implemented using macros.
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=head1 SEE ALSO
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L<SSL_CTX_set_options(3)>, L<SSL_CONF_cmd(3)>
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=head1 HISTORY
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The setter functions were added in OpenSSL 1.1.0. The getter functions
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were added in OpenSSL 1.1.1.
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=head1 COPYRIGHT
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Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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