@deftypefun {int} {gnutls_srp_base64_decode2} (const gnutls_datum_t * @var{b64_data}, gnutls_datum_t * @var{result})
@var{b64_data}: contains the encoded data

@var{result}: the place where decoded data lie

This function will decode the given encoded data. The decoded data
will be allocated, and stored into result.  It will decode using
the base64 algorithm as used in libsrp.

You should use @code{gnutls_free()}  to free the returned data.

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

@strong{Returns:} 0 on success, or an error code.
@end deftypefun