Add a regenerate button to regenerate the password in Windows.

rlz/lib/machine_id.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "rlz/lib/machine_id.h"
-
-#include "base/sha1.h"
-#include "rlz/lib/assert.h"
-#include "rlz/lib/crc8.h"
-#include "rlz/lib/string_utils.h"
-
-namespace rlz_lib {
-
-bool GetMachineId(std::string* machine_id) {
-  if (!machine_id)
-    return false;
-
-  static std::string calculated_id;
-  static bool calculated = false;
-  if (calculated) {
-    *machine_id = calculated_id;
-    return true;
-  }
-
-  string16 sid_string;
-  int volume_id;
-  if (!GetRawMachineId(&sid_string, &volume_id))
-    return false;
-
-  if (!testing::GetMachineIdImpl(sid_string, volume_id, machine_id))
-    return false;
-
-  calculated = true;
-  calculated_id = *machine_id;
-  return true;
-}
-
-namespace testing {
-
-bool GetMachineIdImpl(const string16& sid_string,
-                      int volume_id,
-                      std::string* machine_id) {
-  machine_id->clear();
-
-  // The ID should be the SID hash + the Hard Drive SNo. + checksum byte.
-  static const int kSizeWithoutChecksum = base::kSHA1Length + sizeof(int);
-  std::basic_string<unsigned char> id_binary(kSizeWithoutChecksum + 1, 0);
-
-  if (!sid_string.empty()) {
-    // In order to be compatible with the old version of RLZ, the hash of the
-    // SID must be done with all the original bytes from the unicode string.
-    // However, the chromebase SHA1 hash function takes only an std::string as
-    // input, so the unicode string needs to be converted to std::string
-    // "as is".
-    size_t byte_count = sid_string.size() * sizeof(string16::value_type);
-    const char* buffer = reinterpret_cast<const char*>(sid_string.c_str());
-    std::string sid_string_buffer(buffer, byte_count);
-
-    // Note that digest can have embedded nulls.
-    std::string digest(base::SHA1HashString(sid_string_buffer));
-    VERIFY(digest.size() == base::kSHA1Length);
-    std::copy(digest.begin(), digest.end(), id_binary.begin());
-  }
-
-  // Convert from int to binary (makes big-endian).
-  for (size_t i = 0; i < sizeof(int); i++) {
-    int shift_bits = 8 * (sizeof(int) - i - 1);
-    id_binary[base::kSHA1Length + i] = static_cast<unsigned char>(
-        (volume_id >> shift_bits) & 0xFF);
-  }
-
-  // Append the checksum byte.
-  if (!sid_string.empty() || (0 != volume_id))
-    rlz_lib::Crc8::Generate(id_binary.c_str(),
-                            kSizeWithoutChecksum,
-                            &id_binary[kSizeWithoutChecksum]);
-
-  return rlz_lib::BytesToString(
-      id_binary.c_str(), kSizeWithoutChecksum + 1, machine_id);
-}
-
-}  // namespace testing
-
-}  // namespace rlz_lib