Provided by: gnutls-doc_3.0.11+really2.12.14-5ubuntu3_all
gnutls_x509_crt_get_extension_by_oid - API function
#include <gnutls/x509.h> int gnutls_x509_crt_get_extension_by_oid(gnutls_x509_crt_t cert, const char * oid, int indx, void * buf, size_t * sizeof_buf, unsigned int * critical);
gnutls_x509_crt_t cert should contain a gnutls_x509_crt_t structure const char * oid holds an Object Identified in null terminated string int indx In case multiple same OIDs exist in the extensions, this specifies which to send. Use zero to get the first one. void * buf a pointer to a structure to hold the name (may be null) size_t * sizeof_buf initially holds the size of buf unsigned int * critical will be non zero if the extension is marked as critical
This function will return the extension specified by the OID in the certificate. The extensions will be returned as binary data DER encoded, in the provided buffer.
On success, GNUTLS_E_SUCCESS (zero) is returned, otherwise an error code is returned. If the certificate does not contain the specified extension GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.
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