SSL_CTX_SET_SSL_VERSION(3)                            Library Functions Manual

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

SYNOPSIS
     #include <openssl/ssl.h>

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

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

     const SSL_METHOD *
     SSL_CTX_get_ssl_method(SSL_CTX *ctx);

     const SSL_METHOD *
     SSL_get_ssl_method(SSL *ssl);

DESCRIPTION
     SSL_CTX_set_ssl_version() sets a new default TLS/SSL method for SSL
     objects newly created from this ctx.  SSL objects already created with
     SSL_new(3) are not affected, except when SSL_clear(3) is called.

     SSL_set_ssl_method() sets a new TLS/SSL method for a particular SSL
     object s.  It may be reset when SSL_clear(3) is called.

     SSL_CTX_get_ssl_method() and SSL_get_ssl_method() return a function
     pointer to the TLS/SSL method set in ctx and ssl, respectively.

     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.

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.

SEE ALSO
     ssl(3), SSL_clear(3), SSL_CTX_new(3), SSL_new(3),
     SSL_set_connect_state(3)

HISTORY
     SSL_CTX_set_ssl_version(), SSL_set_ssl_method(), and SSL_get_ssl_method()
     first appeared in SSLeay 0.8.0 and have been available since OpenBSD 2.4.
     SSL_CTX_get_ssl_method() first appeared in OpenSSL 1.1.0 and has been
     available since OpenBSD 7.0.

Linux 6.8.2-arch2-1              May 11, 2021              Linux 6.8.2-arch2-1