Remove AccessVerifier interface.

remoting/host/support_access_verifier.cc

-// Copyright (c) 2011 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.
-
-#include "remoting/host/support_access_verifier.h"
-
-#include <stdlib.h>
-#include <vector>
-
-#include "base/logging.h"
-#include "base/rand_util.h"
-#include "base/string_util.h"
-#include "remoting/host/host_config.h"
-#include "remoting/protocol/auth_util.h"
-
-namespace remoting {
-
-namespace {
-// 5 digits means 100K possible host secrets with uniform distribution, which
-// should be enough for short-term passwords, given that we rate-limit guesses
-// in the cloud and expire access codes after a small number of attempts.
-const int kHostSecretLength = 5;
-const char kHostSecretAlphabet[] = "0123456789";
-
-// Generates cryptographically strong random number in the range [0, max).
-int CryptoRandomInt(int max) {
-  uint32 random_int32;
-  base::RandBytes(&random_int32, sizeof(random_int32));
-  return random_int32 % max;
-}
-
-std::string GenerateRandomHostSecret() {
-  std::vector<char> result;
-  int alphabet_size = strlen(kHostSecretAlphabet);
-  result.resize(kHostSecretLength);
-  for (int i = 0; i < kHostSecretLength; ++i) {
-    result[i] = kHostSecretAlphabet[CryptoRandomInt(alphabet_size)];
-  }
-  return std::string(result.begin(), result.end());
-}
-
-}  // namespace
-
-SupportAccessVerifier::SupportAccessVerifier() {
-  host_secret_ = GenerateRandomHostSecret();
-}
-
-SupportAccessVerifier::~SupportAccessVerifier() { }
-
-bool SupportAccessVerifier::VerifyPermissions(
-    const std::string& client_jid,
-    const std::string& encoded_access_token) {
-  if (support_id_.empty())
-    return false;
-  std::string access_code = support_id_ + host_secret_;
-  return protocol::VerifySupportAuthToken(
-      client_jid, access_code, encoded_access_token);
-}
-
-void SupportAccessVerifier::OnIT2MeHostRegistered(
-    bool successful, const std::string& support_id) {
-  if (successful) {
-    support_id_ = support_id;
-  } else {
-    LOG(ERROR) << "Failed to register support host";
-  }
-}
-
-}  // namespace remoting