failure.
X509_VERIFY_PARAM_get0_host(), X509_VERIFY_PARAM_get0_email(), and
-X509_VERIFY_PARAM_get1_ip_asc(), return the string pointers pecified above
+X509_VERIFY_PARAM_get1_ip_asc(), return the string pointers specified above
or NULL if the respective value has not been set or on error.
X509_VERIFY_PARAM_get_flags() returns the current verification flags.