gnutls_x509_crt_get_extension_oid — This function returns the specified extension OID
#include <gnutls/x509.h>
int
gnutls_x509_crt_get_extension_oid( |
gnutls_x509_crt_t | cert, |
| int | indx, | |
| void * | oid, | |
| size_t * | sizeof_oid); |
should contain a gnutls_x509_crt_t structure
Specifies which extension OID to send. Use zero to get the first one.
a pointer to a structure to hold the OID (may be null)
initially holds the size of oid
This function will return the requested extension OID in the certificate. The extension OID will be stored as a string in the provided buffer.
A negative value may be returned in case of parsing error. If your have reached the last extension available GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.