remoting/host/pin_hash.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "remoting/host/pin_hash.h"
   6
   7 #include "base/base64.h"
   8 #include "base/logging.h"
   9 #include "remoting/protocol/authentication_method.h"
  10 #include "remoting/protocol/me2me_host_authenticator_factory.h"
  11
  12 namespace remoting {
  13
  14 std::string MakeHostPinHash(const std::string& host_id,
  15                             const std::string& pin) {
  16   std::string hash = protocol::AuthenticationMethod::ApplyHashFunction(
  17       protocol::AuthenticationMethod::HMAC_SHA256, host_id, pin);
  18   std::string hash_base64;
  19   if (!base::Base64Encode(hash, &hash_base64)) {
  20     LOG(FATAL) << "Base64Encode failed";
  21   }
  22   return "hmac:" + hash_base64;
  23 }
  24
  25 bool VerifyHostPinHash(const std::string& hash,
  26                        const std::string& host_id,
  27                        const std::string& pin) {
  28   remoting::protocol::SharedSecretHash hash_parsed;
  29   if (!hash_parsed.Parse(hash)) {
  30     LOG(FATAL) << "Invalid hash.";
  31     return false;
  32   }
  33   std::string hash_calculated =
  34       remoting::protocol::AuthenticationMethod::ApplyHashFunction(
  35           hash_parsed.hash_function, host_id, pin);
  36   return hash_calculated == hash_parsed.value;
  37 }
  38
  39 }  // namespace remoting