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       gnutls_ocsp_resp_get_extension - API function


       #include <gnutls/ocsp.h>

       int  gnutls_ocsp_resp_get_extension(gnutls_ocsp_resp_t resp, unsigned indx, gnutls_datum_t
       * oid, unsigned int * critical, gnutls_datum_t * data);


       gnutls_ocsp_resp_t resp
                   should contain a gnutls_ocsp_resp_t type

       unsigned indx
                   Specifies which extension OID to get. Use (0) to get the first one.

       gnutls_datum_t * oid
                   will hold newly allocated buffer with OID of extension, may be NULL

       unsigned int * critical
                   output variable with critical flag, may be NULL.

       gnutls_datum_t * data
                   will hold newly allocated buffer with extension data, may be NULL


       This function will return all information  about  the  requested  extension  in  the  OCSP
       response.   The  information  returned is the OID, the critical flag, and the data itself.
       The extension OID will be stored as a string.  Any of  oid ,  critical , and  data may  be
       NULL which means that the caller is not interested in getting that information back.

       The caller needs to deallocate memory by calling gnutls_free() on
        oid ->data and  data ->data.


       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned.
       If you have reached the  last  extension  available  GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE
       will be returned.


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