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 "chrome/browser/chromeos/settings/owner_key_util.h"
6
7#include <limits>
8
9#include "base/file_util.h"
10#include "base/logging.h"
11#include "base/path_service.h"
12#include "base/stl_util.h"
13#include "chromeos/chromeos_paths.h"
14#include "crypto/rsa_private_key.h"
15
16namespace chromeos {
17
18///////////////////////////////////////////////////////////////////////////
19// OwnerKeyUtil
20
21OwnerKeyUtil* OwnerKeyUtil::Create() {
22  base::FilePath owner_key_path;
23  CHECK(PathService::Get(chromeos::FILE_OWNER_KEY, &owner_key_path));
24  return new OwnerKeyUtilImpl(owner_key_path);
25}
26
27OwnerKeyUtil::OwnerKeyUtil() {}
28
29OwnerKeyUtil::~OwnerKeyUtil() {}
30
31///////////////////////////////////////////////////////////////////////////
32// OwnerKeyUtilImpl
33
34OwnerKeyUtilImpl::OwnerKeyUtilImpl(const base::FilePath& key_file)
35    : key_file_(key_file) {}
36
37OwnerKeyUtilImpl::~OwnerKeyUtilImpl() {}
38
39bool OwnerKeyUtilImpl::ImportPublicKey(std::vector<uint8>* output) {
40  // Get the file size (must fit in a 32 bit int for NSS).
41  int64 file_size;
42  if (!file_util::GetFileSize(key_file_, &file_size)) {
43    LOG(ERROR) << "Could not get size of " << key_file_.value();
44    return false;
45  }
46  if (file_size > static_cast<int64>(std::numeric_limits<int>::max())) {
47    LOG(ERROR) << key_file_.value() << "is "
48               << file_size << "bytes!!!  Too big!";
49    return false;
50  }
51  int32 safe_file_size = static_cast<int32>(file_size);
52
53  output->resize(safe_file_size);
54
55  if (safe_file_size == 0) {
56    LOG(WARNING) << "Public key file is empty. This seems wrong.";
57    return false;
58  }
59
60  // Get the key data off of disk
61  int data_read = file_util::ReadFile(
62      key_file_,
63      reinterpret_cast<char*>(vector_as_array(output)),
64      safe_file_size);
65  return data_read == safe_file_size;
66}
67
68crypto::RSAPrivateKey* OwnerKeyUtilImpl::FindPrivateKey(
69    const std::vector<uint8>& key) {
70  return crypto::RSAPrivateKey::FindFromPublicKeyInfo(key);
71}
72
73bool OwnerKeyUtilImpl::IsPublicKeyPresent() {
74  return base::PathExists(key_file_);
75}
76
77}  // namespace chromeos
78