|  | =pod | 
|  |  | 
|  | =head1 NAME | 
|  |  | 
|  | SSL_CTX_get0_param, SSL_get0_param, SSL_CTX_set1_param, SSL_set1_param - | 
|  | get and set verification parameters | 
|  |  | 
|  | =head1 SYNOPSIS | 
|  |  | 
|  | #include <openssl/ssl.h> | 
|  |  | 
|  | X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx); | 
|  | X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl); | 
|  | int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm); | 
|  | int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm); | 
|  |  | 
|  | =head1 DESCRIPTION | 
|  |  | 
|  | SSL_CTX_get0_param() and SSL_get0_param() retrieve an internal pointer to | 
|  | the verification parameters for B<ctx> or B<ssl> respectively. The returned | 
|  | pointer must not be freed by the calling application. | 
|  |  | 
|  | SSL_CTX_set1_param() and SSL_set1_param() set the verification parameters | 
|  | to B<vpm> for B<ctx> or B<ssl>. | 
|  |  | 
|  | =head1 NOTES | 
|  |  | 
|  | Typically parameters are retrieved from an B<SSL_CTX> or B<SSL> structure | 
|  | using SSL_CTX_get0_param() or SSL_get0_param() and an application modifies | 
|  | them to suit its needs: for example to add a hostname check. | 
|  |  | 
|  | =head1 RETURN VALUES | 
|  |  | 
|  | SSL_CTX_get0_param() and SSL_get0_param() return a pointer to an | 
|  | B<X509_VERIFY_PARAM> structure. | 
|  |  | 
|  | SSL_CTX_set1_param() and SSL_set1_param() return 1 for success and 0 | 
|  | for failure. | 
|  |  | 
|  | =head1 EXAMPLES | 
|  |  | 
|  | Check hostname matches "www.foo.com" in peer certificate: | 
|  |  | 
|  | X509_VERIFY_PARAM *vpm = SSL_get0_param(ssl); | 
|  | X509_VERIFY_PARAM_set1_host(vpm, "www.foo.com", 0); | 
|  |  | 
|  | =head1 SEE ALSO | 
|  |  | 
|  | L<ssl(7)>, | 
|  | L<X509_VERIFY_PARAM_set_flags(3)> | 
|  |  | 
|  | =head1 HISTORY | 
|  |  | 
|  | These functions were added in OpenSSL 1.0.2. | 
|  |  | 
|  | =head1 COPYRIGHT | 
|  |  | 
|  | Copyright 2015-2020 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 | 
|  | L<https://www.openssl.org/source/license.html>. | 
|  |  | 
|  | =cut |