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@deftypefun {int} {gnutls_x509_crt_get_extension_data} (gnutls_x509_crt_t @var{cert}, int @var{indx}, void * @var{data}, size_t * @var{sizeof_data})
@var{cert}: should contain a @code{gnutls_x509_crt_t} structure
@var{indx}: Specifies which extension OID to send. 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{data}
This function will return the requested extension data in the
certificate. The extension data will be stored in the
provided buffer.
Use @code{gnutls_x509_crt_get_extension_info()} to extract the OID and
critical flag. Use @code{gnutls_x509_crt_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 is returned. If you have reached the
last extension available @code{GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE}
will be returned.
@end deftypefun
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