int gnutls_x509_crt_get_issuer_dn_oid(gnutls_x509_crt_t cert, int indx, void * oid, size_t * sizeof_oid);
ARGUMENTS
gnutls_x509_crt_t cert
should contain a gnutls_x509_crt_t structure
int indx
This specifies which OID to return. Use zero to get the first one.
void * oid
a pointer to a buffer to hold the OID (may be null)
size_t * sizeof_oid
initially holds the size of oid
DESCRIPTION
This function will extract the OIDs of the name of the Certificate
issuer specified by the given index.
If oid is null then only the size will be filled.
RETURNS
GNUTLS_E_SHORT_MEMORY_BUFFER if the provided buffer is not
long enough, and in that case the *sizeof_oid will be updated with
the required size. On success 0 is returned.