chromecast/crypto/signature_cache.cc

   1 // Copyright 2015 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 "chromecast/crypto/signature_cache.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace chromecast {
  10
  11 namespace {
  12 const int kSignatureCacheSize = 10;
  13 }  // namespace
  14
  15 SignatureCache::SignatureCache()
  16     : contents_(kSignatureCacheSize) {}
  17
  18 SignatureCache::~SignatureCache() {}
  19
  20 std::string SignatureCache::Get(const std::string& wrapped_private_key,
  21                                 const std::string& hash) {
  22   std::string result;
  23   base::AutoLock lock(lock_);
  24
  25   if (wrapped_private_key != key_)
  26     return result;
  27
  28   const auto iter = contents_.Get(hash);
  29   if (iter != contents_.end())
  30     result = iter->second;
  31
  32   return result;
  33 }
  34
  35 void SignatureCache::Put(const std::string& wrapped_private_key,
  36                          const std::string& hash,
  37                          const std::string& signature) {
  38   base::AutoLock lock(lock_);
  39
  40   if (wrapped_private_key != key_) {
  41     key_ = wrapped_private_key;
  42     contents_.Clear();
  43   }
  44
  45   contents_.Put(hash, signature);
  46 }
  47
  48 }  // namespace chromecast