_H
BString _H(const BString& value) const;
fDigestCnonce = _H(fDigestOpaque);
A1 = _H(A1);
PRINT(("HttpAuth: > H(A1) = %s\n", _H(A1).String()));
PRINT(("HttpAuth: > H(A2) = %s\n", _H(A2).String()));
<< ":auth:" << _H(A2);
BString response = _KD(_H(A1), secretResp);
return _H(encode);