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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 
16 namespace chromeos {
17 
18 ///////////////////////////////////////////////////////////////////////////
19 // PublicKey
20 
PublicKey()21 PublicKey::PublicKey() {
22 }
23 
~PublicKey()24 PublicKey::~PublicKey() {
25 }
26 
27 ///////////////////////////////////////////////////////////////////////////
28 // PrivateKey
29 
PrivateKey(crypto::RSAPrivateKey * key)30 PrivateKey::PrivateKey(crypto::RSAPrivateKey* key) : key_(key) {
31 }
32 
~PrivateKey()33 PrivateKey::~PrivateKey() {
34 }
35 
36 ///////////////////////////////////////////////////////////////////////////
37 // OwnerKeyUtil
38 
Create()39 OwnerKeyUtil* OwnerKeyUtil::Create() {
40   base::FilePath owner_key_path;
41   CHECK(PathService::Get(chromeos::FILE_OWNER_KEY, &owner_key_path));
42   return new OwnerKeyUtilImpl(owner_key_path);
43 }
44 
OwnerKeyUtil()45 OwnerKeyUtil::OwnerKeyUtil() {}
46 
~OwnerKeyUtil()47 OwnerKeyUtil::~OwnerKeyUtil() {}
48 
49 ///////////////////////////////////////////////////////////////////////////
50 // OwnerKeyUtilImpl
51 
OwnerKeyUtilImpl(const base::FilePath & key_file)52 OwnerKeyUtilImpl::OwnerKeyUtilImpl(const base::FilePath& key_file)
53     : key_file_(key_file) {}
54 
~OwnerKeyUtilImpl()55 OwnerKeyUtilImpl::~OwnerKeyUtilImpl() {}
56 
ImportPublicKey(std::vector<uint8> * output)57 bool OwnerKeyUtilImpl::ImportPublicKey(std::vector<uint8>* output) {
58   // Get the file size (must fit in a 32 bit int for NSS).
59   int64 file_size;
60   if (!base::GetFileSize(key_file_, &file_size)) {
61     LOG(ERROR) << "Could not get size of " << key_file_.value();
62     return false;
63   }
64   if (file_size > static_cast<int64>(std::numeric_limits<int>::max())) {
65     LOG(ERROR) << key_file_.value() << "is "
66                << file_size << "bytes!!!  Too big!";
67     return false;
68   }
69   int32 safe_file_size = static_cast<int32>(file_size);
70 
71   output->resize(safe_file_size);
72 
73   if (safe_file_size == 0) {
74     LOG(WARNING) << "Public key file is empty. This seems wrong.";
75     return false;
76   }
77 
78   // Get the key data off of disk
79   int data_read = base::ReadFile(
80       key_file_,
81       reinterpret_cast<char*>(vector_as_array(output)),
82       safe_file_size);
83   return data_read == safe_file_size;
84 }
85 
FindPrivateKey(const std::vector<uint8> & key)86 crypto::RSAPrivateKey* OwnerKeyUtilImpl::FindPrivateKey(
87     const std::vector<uint8>& key) {
88   return crypto::RSAPrivateKey::FindFromPublicKeyInfo(key);
89 }
90 
FindPrivateKeyInSlot(const std::vector<uint8> & key,PK11SlotInfo * slot)91 crypto::RSAPrivateKey* OwnerKeyUtilImpl::FindPrivateKeyInSlot(
92     const std::vector<uint8>& key,
93     PK11SlotInfo* slot) {
94   return crypto::RSAPrivateKey::FindFromPublicKeyInfoInSlot(key, slot);
95 }
96 
IsPublicKeyPresent()97 bool OwnerKeyUtilImpl::IsPublicKeyPresent() {
98   return base::PathExists(key_file_);
99 }
100 
101 }  // namespace chromeos
102