SSL_CTX_get0_param.3ssl man page

SSL_CTX_get0_param, SSL_get0_param, SSL_CTX_set1_param, SSL_set1_param ā€” get and set verification parameters


 #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)


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.


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.


Check hostname matches "" in peer certificate:

 X509_VERIFY_PARAM *vpm = SSL_get0_param(ssl);
 X509_VERIFY_PARAM_set1_host(vpm, "", 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



These functions were first added to OpenSSL 1.0.2.


2018-03-27 1.0.2o OpenSSL