Remove AccessVerifier interface.

remoting/host/host_secret.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/host_secret.h"
+
+#include <vector>
+
+#include "base/logging.h"
+#include "base/rand_util.h"
+#include "base/string_number_conversions.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 kMaxHostSecret = 100000;
+
+// Generates cryptographically strong random number in the range [0, max).
+int CryptoRandomInt(int max) {
+  uint64 random_int32;
+  base::RandBytes(&random_int32, sizeof(random_int32));
+  return random_int32 % max;
+}
+
+}  // namespace
+
+std::string GenerateSupportHostSecret() {
+  return base::IntToString(CryptoRandomInt(kMaxHostSecret));
+}
+
+}  // namespace remoting