- NAME
- SYNOPSIS
- DESCRIPTION
- NOTES
- RETURN VALUES
- EXAMPLES
- SEE ALSO
- HISTORY
- COPYRIGHT

# NAME

SSL_CTX_get0_param, SSL_get0_param, SSL_CTX_set1_param, SSL_set1_param - get and set verification parameters

# 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)

# 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.

# 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() and SSL_set1_param() 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

X509_VERIFY_PARAM_set_flags(3)

# HISTORY

These functions were added in OpenSSL 1.0.2.

# COPYRIGHT

Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (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.