Cleanup AuthenticatorMethod usage.

remoting/protocol/authentication_method.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-#ifndef REMOTING_PROTOCOL_AUTHENTICATION_METHOD_H_
-#define REMOTING_PROTOCOL_AUTHENTICATION_METHOD_H_
-
-#include <string>
-
-namespace remoting {
-namespace protocol {
-
-class Authenticator;
-
-// AuthenticationMethod represents an authentication algorithm.
-enum class AuthenticationMethod {
-  INVALID,
-  SPAKE2_SHARED_SECRET_PLAIN,
-  SPAKE2_SHARED_SECRET_HMAC,
-  SPAKE2_PAIR,
-  THIRD_PARTY
-};
-
-enum class HashFunction {
-  NONE,
-  HMAC_SHA256,
-};
-
-// Parses a string that defines an authentication method. Returns
-// AuthenticationMethod::INVALID if the string is invalid.
-AuthenticationMethod ParseAuthenticationMethodString(const std::string& value);
-
-// Returns string representation of |method|.
-const std::string AuthenticationMethodToString(AuthenticationMethod method);
-
-// Returns hash function applied to the shared secret on both ends for the
-// spefied |method|.
-HashFunction GetHashFunctionForAuthenticationMethod(
-    AuthenticationMethod method);
-
-// Applies the specified hash function to |shared_secret| with the
-// specified |tag| as a key.
-std::string ApplySharedSecretHashFunction(HashFunction hash_function,
-                                          const std::string& tag,
-                                          const std::string& shared_secret);
-
-}  // namespace protocol
-}  // namespace remoting
-
-#endif  // REMOTING_PROTOCOL_AUTHENTICATION_METHOD_H_