mirror of
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94 lines
2.6 KiB
Plaintext
94 lines
2.6 KiB
Plaintext
=pod
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=head1 NAME
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SSL_CTX_set_ssl_version, SSL_CTX_get_ssl_method, SSL_set_ssl_method, SSL_get_ssl_method
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- choose a new TLS/SSL method
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *method);
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const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx);
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int SSL_set_ssl_method(SSL *s, const SSL_METHOD *method);
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const SSL_METHOD *SSL_get_ssl_method(const SSL *ssl);
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=head1 DESCRIPTION
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SSL_CTX_set_ssl_version() sets a new default TLS/SSL B<method> for SSL objects
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newly created from this B<ctx>. Most of the configuration attached to the
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SSL_CTX object is retained, with the exception of the configured TLS ciphers,
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which are reset to the default values. SSL objects already created from this
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SSL_CTX with L<SSL_new(3)> are not affected, except when L<SSL_clear(3)> is
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being called, as described below.
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SSL_CTX_get_ssl_method() returns the SSL_METHOD which was used to construct the
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SSL_CTX.
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SSL_set_ssl_method() sets a new TLS/SSL B<method> for a particular B<ssl>
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object. It may be reset, when SSL_clear() is called.
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SSL_get_ssl_method() returns a pointer to the TLS/SSL method
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set in B<ssl>.
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=head1 NOTES
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The available B<method> choices are described in
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L<SSL_CTX_new(3)>.
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When L<SSL_clear(3)> is called and no session is connected to
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an SSL object, the method of the SSL object is reset to the method currently
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set in the corresponding SSL_CTX object.
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SSL_CTX_set_version() has unusual semantics and no clear use case;
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it would usually be preferable to create a new SSL_CTX object than to
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try to reuse an existing one in this fashion. Its usage is considered
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deprecated.
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SSL_set_ssl_method() cannot be used to change a non-QUIC SSL object to a QUIC
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SSL object or vice versa, or change a QUIC SSL object from one QUIC method to
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another.
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=head1 RETURN VALUES
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The following return values can occur for SSL_CTX_set_ssl_version()
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and SSL_set_ssl_method():
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=over 4
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=item Z<>0
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The new choice failed, check the error stack to find out the reason.
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=item Z<>1
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The operation succeeded.
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=back
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SSL_CTX_get_ssl_method() and SSL_get_ssl_method() always return non-NULL
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pointers.
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=head1 SEE ALSO
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L<SSL_CTX_new(3)>, L<SSL_new(3)>,
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L<SSL_clear(3)>, L<ssl(7)>,
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L<SSL_set_connect_state(3)>
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=head1 HISTORY
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SSL_CTX_set_ssl_version() was deprecated in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2000-2023 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (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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