@deftypefun {int} {gnutls_srp_base64_decode} (const gnutls_datum_t * @var{b64_data}, char * @var{result}, size_t * @var{result_size})
@var{b64_data}: contain the encoded data

@var{result}: the place where decoded data will be copied

@var{result_size}: holds the size of the result

This function will decode the given encoded data, using the base64
encoding found in libsrp.

Note that  @code{b64_data} should be null terminated.

Warning!  This base64 encoding is not the "standard" encoding, so
do not use it for non-SRP purposes.

@strong{Returns:} @code{GNUTLS_E_SHORT_MEMORY_BUFFER}  if the buffer given is not
long enough, or 0 on success.
@end deftypefun