1    :  // Copyright 2014 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/kasko/crash_keys_serialization.h"
  16    :  
  17    :  #include "base/logging.h"
  18    :  #include "base/values.h"
  19    :  #include "base/files/file_path.h"
  20    :  #include "base/files/file_util.h"
  21    :  #include "base/json/json_reader.h"
  22    :  #include "base/json/json_writer.h"
  23    :  #include "base/memory/scoped_ptr.h"
  24    :  #include "base/strings/utf_string_conversions.h"
  25    :  
  26    :  namespace kasko {
  27    :  
  28    :  bool ReadCrashKeysFromFile(
  29    :      const base::FilePath& file_path,
  30  E :      std::map<base::string16, base::string16>* crash_keys) {
  31  E :    DCHECK(crash_keys);
  32  E :    std::string file_contents;
  33  E :    if (!base::ReadFileToString(file_path, &file_contents)) {
  34  E :      LOG(ERROR) << "Failed to read crash keys from file " << file_path.value();
  35  E :      return false;
  36    :    }
  37    :  
  38  E :    scoped_ptr<base::Value> value(base::JSONReader::Read(file_contents));
  39  E :    base::DictionaryValue* dictionary = nullptr;
  40  E :    if (!value || !value->GetAsDictionary(&dictionary)) {
  41  E :      LOG(ERROR) << "The crash keys file contents from " << file_path.value()
  42    :                 << " are not a valid JSON dictionary:\n" << file_contents;
  43  E :      return false;
  44    :    }
  45    :  
  46  E :    for (base::DictionaryValue::Iterator it(*dictionary); !it.IsAtEnd();
  47  E :         it.Advance()) {
  48  E :      base::string16 value;
  49  E :      if (!it.value().GetAsString(&value)) {
  50  E :        LOG(ERROR) << "The crash keys file contents from " << file_path.value()
  51    :                   << " contain an invalid value for entry " << it.key()
  52    :                   << ". File Contents:\n" << file_contents;
  53  E :        return false;
  54    :      }
  55  E :      crash_keys->insert(std::make_pair(base::UTF8ToWide(it.key()), value));
  56  E :    }
  57  E :    return true;
  58  E :  }
  59    :  
  60    :  bool WriteCrashKeysToFile(
  61    :      const base::FilePath& file_path,
  62  E :      const std::map<base::string16, base::string16>& crash_keys) {
  63  E :    base::DictionaryValue dictionary;
  64  E :    for (const auto& entry : crash_keys) {
  65    :      dictionary.SetStringWithoutPathExpansion(base::WideToUTF8(entry.first),
  66  E :                                               base::WideToUTF8(entry.second));
  67  E :    }
  68    :  
  69  E :    std::string file_contents;
  70  E :    if (!base::JSONWriter::Write(dictionary, &file_contents)) {
  71  i :      LOG(ERROR) << "Failed to serialize crash keys.";
  72  i :      return false;
  73    :    }
  74    :  
  75    :    if (!base::WriteFile(file_path, file_contents.data(),
  76  E :                         file_contents.length())) {
  77  i :      LOG(ERROR) << "Failed to write serialized crash keys to "
  78    :                 << file_path.value();
  79  i :      return false;
  80    :    }
  81    :  
  82  E :    return true;
  83  E :  }
  84    :  
  85    :  }  // namespace kasko