SSL_CTX_set_ssl_version(3) - NetBSD Manual Pages

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SSL_CTX_set_ssl_version(3)          OpenSSL         SSL_CTX_set_ssl_version(3)




NAME

       SSL_CTX_set_ssl_version, SSL_CTX_get_ssl_method, SSL_set_ssl_method,
       SSL_get_ssl_method - choose a new TLS/SSL method


LIBRARY

       libcrypto, -lcrypto


SYNOPSIS

        #include <openssl/ssl.h>

        int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *method);
        const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx);

        int SSL_set_ssl_method(SSL *s, const SSL_METHOD *method);
        const SSL_METHOD *SSL_get_ssl_method(const SSL *ssl);


DESCRIPTION

       SSL_CTX_set_ssl_version() sets a new default TLS/SSL method for SSL
       objects newly created from this ctx.  Most of the configuration
       attached to the SSL_CTX object is retained, with the exception of the
       configured TLS ciphers, which are reset to the default values.  SSL
       objects already created from this SSL_CTX with SSL_new(3) are not
       affected, except when SSL_clear(3) is being called, as described below.

       SSL_CTX_get_ssl_method() returns the SSL_METHOD which was used to
       construct the SSL_CTX.

       SSL_set_ssl_method() sets a new TLS/SSL method for a particular ssl
       object. It may be reset, when SSL_clear() is called.

       SSL_get_ssl_method() returns a pointer to the TLS/SSL method set in
       ssl.


NOTES

       The available method choices are described in SSL_CTX_new(3).

       When SSL_clear(3) is called and no session is connected to an SSL
       object, the method of the SSL object is reset to the method currently
       set in the corresponding SSL_CTX object.

       SSL_CTX_set_version() has unusual semantics and no clear use case; it
       would usually be preferable to create a new SSL_CTX object than to try
       to reuse an existing one in this fashion.  Its usage is considered
       deprecated.


RETURN VALUES

       The following return values can occur for SSL_CTX_set_ssl_version() and
       SSL_set_ssl_method():

       0   The new choice failed, check the error stack to find out the
           reason.

       1   The operation succeeded.

       SSL_CTX_get_ssl_method() and SSL_get_ssl_method() always return non-
       NULL pointers.


SEE ALSO

       SSL_CTX_new(3), SSL_new(3), SSL_clear(3), ssl(7),
       SSL_set_connect_state(3)


HISTORY

       SSL_CTX_set_ssl_version() was deprecated in OpenSSL 3.0.


COPYRIGHT

       Copyright 2000-2022 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_ssl_version(3)