@deftypefun {int} {gnutls_x509_crq_get_extension_data} (gnutls_x509_crq_t @var{crq}, unsigned @var{indx}, void * @var{data}, size_t * @var{sizeof_data})

@var{crq}: should contain a @code{gnutls_x509_crq_t}  type

@var{indx}: Specifies which extension number to get. Use (0) to get the first one.

@var{data}: a pointer to a structure to hold the data (may be null)

@var{sizeof_data}: initially holds the size of  @code{oid} 

This function will return the requested extension data in the

certificate.  The extension data will be stored as a string in the

provided buffer.

Use @code{gnutls_x509_crq_get_extension_info()}  to extract the OID and

critical flag.  Use @code{gnutls_x509_crq_get_extension_by_oid()}  instead,

if you want to get data indexed by the extension OID rather than

sequence.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a

negative error code in case of an error.  If your have reached the

last extension available @code{GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE} 

will be returned.

@strong{Since:} 2.8.0

@end deftypefun