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   base::Base64Encode(hash, &hash_base64);
  20   return "hmac:" + hash_base64;
  21 }
  22
  23 bool VerifyHostPinHash(const std::string& hash,
  24                        const std::string& host_id,
  25                        const std::string& pin) {
  26   remoting::protocol::SharedSecretHash hash_parsed;
  27   if (!hash_parsed.Parse(hash)) {
  28     LOG(FATAL) << "Invalid hash.";
  29     return false;
  30   }
  31   std::string hash_calculated =
  32       remoting::protocol::AuthenticationMethod::ApplyHashFunction(
  33           hash_parsed.hash_function, host_id, pin);
  34   return hash_calculated == hash_parsed.value;
  35 }
  36
  37 }  // namespace remoting