gnutls_x509_crt_check_ip - Man Page

API function


#include <gnutls/x509.h>

unsigned gnutls_x509_crt_check_ip(gnutls_x509_crt_t cert, const unsigned char * ip, unsigned int ip_size, unsigned int flags);


gnutls_x509_crt_t cert

should contain an gnutls_x509_crt_t type

const unsigned char * ip

A pointer to the raw IP address

unsigned int ip_size

the number of bytes in ip (4 or 16)

unsigned int flags

should be zero


This function will check if the IP allowed IP addresses in  the certificate's subject alternative name match the provided IP address.


non-zero for a successful match, and zero on failure.

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3.8.3 gnutls