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 <memory>
  18    :  
  19    :  #include "base/logging.h"
  20    :  #include "base/values.h"
  21    :  #include "base/files/file_path.h"
  22    :  #include "base/files/file_util.h"
  23    :  #include "base/json/json_reader.h"
  24    :  #include "base/json/json_writer.h"
  25    :  #include "base/strings/utf_string_conversions.h"
  26    :  
  27  m :  namespace kasko {
  28    :  
  29  m :  bool ReadCrashKeysFromFile(
  30  m :      const base::FilePath& file_path,
  31  m :      std::map<base::string16, base::string16>* crash_keys) {
  32  m :    DCHECK(crash_keys);
  33  m :    std::string file_contents;
  34  m :    if (!base::ReadFileToString(file_path, &file_contents)) {
  35  m :      LOG(ERROR) << "Failed to read crash keys from file " << file_path.value();
  36  m :      return false;
  37  m :    }
  38    :  
  39  m :    std::unique_ptr<base::Value> value(
  40  m :        base::JSONReader::Read(file_contents).release());
  41  m :    base::DictionaryValue* dictionary = nullptr;
  42  m :    if (!value || !value->GetAsDictionary(&dictionary)) {
  43  m :      LOG(ERROR) << "The crash keys file contents from " << file_path.value()
  44  m :                 << " are not a valid JSON dictionary:\n" << file_contents;
  45  m :      return false;
  46  m :    }
  47    :  
  48  m :    for (base::DictionaryValue::Iterator it(*dictionary); !it.IsAtEnd();
  49  m :         it.Advance()) {
  50  m :      base::string16 value;
  51  m :      if (!it.value().GetAsString(&value)) {
  52  m :        LOG(ERROR) << "The crash keys file contents from " << file_path.value()
  53  m :                   << " contain an invalid value for entry " << it.key()
  54  m :                   << ". File Contents:\n" << file_contents;
  55  m :        return false;
  56  m :      }
  57  m :      crash_keys->insert(std::make_pair(base::UTF8ToWide(it.key()), value));
  58  m :    }
  59  m :    return true;
  60  m :  }
  61    :  
  62  m :  bool WriteCrashKeysToFile(
  63  m :      const base::FilePath& file_path,
  64  m :      const std::map<base::string16, base::string16>& crash_keys) {
  65  m :    base::DictionaryValue dictionary;
  66  m :    for (const auto& entry : crash_keys) {
  67  m :      dictionary.SetStringWithoutPathExpansion(base::WideToUTF8(entry.first),
  68  m :                                               base::WideToUTF8(entry.second));
  69  m :    }
  70    :  
  71  m :    std::string file_contents;
  72  m :    if (!base::JSONWriter::Write(dictionary, &file_contents)) {
  73  m :      LOG(ERROR) << "Failed to serialize crash keys.";
  74  m :      return false;
  75  m :    }
  76    :  
  77  m :    if (!base::WriteFile(file_path, file_contents.data(),
  78  m :                         file_contents.length())) {
  79  m :      LOG(ERROR) << "Failed to write serialized crash keys to "
  80  m :                 << file_path.value();
  81  m :      return false;
  82  m :    }
  83    :  
  84  m :    return true;
  85  m :  }
  86    :  
  87  m :  }  // namespace kasko