Updated: 2022/Sep/29

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SSL_CTX_get0_param(3)               OpenSSL              SSL_CTX_get0_param(3)



NAME
       SSL_CTX_get0_param, SSL_get0_param, SSL_CTX_set1_param, SSL_set1_param,
       SSL_CTX_set_purpose, SSL_CTX_set_trust, SSL_set_purpose, SSL_set_trust
       - get and set verification parameters

LIBRARY
       libcrypto, -lcrypto

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);

        int SSL_CTX_set_purpose(SSL_CTX *ctx, int purpose);
        int SSL_set_purpose(SSL *ssl, int purpose);

        int SSL_CTX_set_trust(SSL_CTX *ctx, int trust);
        int SSL_set_trust(SSL *ssl, int trust);

DESCRIPTION
       SSL_CTX_get0_param() and SSL_get0_param() retrieve an internal pointer
       to the verification parameters for ctx or 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 vpm for ctx or ssl.

       The functions SSL_CTX_set_purpose() and SSL_set_purpose() are
       shorthands which set the purpose parameter on the verification
       parameters object. These functions are equivalent to calling
       X509_VERIFY_PARAM_set_purpose() directly.

       The functions SSL_CTX_set_trust() and SSL_set_trust() are similarly
       shorthands which set the trust parameter on the verification parameters
       object. These functions are equivalent to calling
       X509_VERIFY_PARAM_set_trust() directly.

NOTES
       Typically parameters are retrieved from an SSL_CTX or 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.

RETURN VALUES
       SSL_CTX_get0_param() and SSL_get0_param() return a pointer to an
       X509_VERIFY_PARAM structure.

       SSL_CTX_set1_param(), SSL_set1_param(), SSL_CTX_set_purpose(),
       SSL_set_purpose(), SSL_CTX_set_trust() and SSL_set_trust() return 1 for
       success and 0 for failure.

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);

SEE ALSO
       ssl(7), X509_VERIFY_PARAM_set_flags(3)

HISTORY
       These functions were added in OpenSSL 1.0.2.

COPYRIGHT
       Copyright 2015-2022 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_get0_param(3)