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.

EXAMPLE

       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);

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.

SEE ALSO

       X509_VERIFY_PARAM_set_flags(3)

HISTORY

       These functions were first added to OpenSSL 1.0.2.