1 // Copyright (c) 2010 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 // NOTE: this file is Winodws specific.
6
7 #include "chrome/browser/sync/util/data_encryption.h"
8
9 #include <windows.h>
10 #include <wincrypt.h>
11
12 #include <cstddef>
13 #include <string>
14 #include <vector>
15
16 #include "base/logging.h"
17
18 using std::string;
19 using std::vector;
20
EncryptData(const string & data)21 vector<uint8> EncryptData(const string& data) {
22 DATA_BLOB unencrypted_data = { 0 };
23 unencrypted_data.pbData = (BYTE*)(data.data());
24 unencrypted_data.cbData = data.size();
25 DATA_BLOB encrypted_data = { 0 };
26
27 if (!CryptProtectData(&unencrypted_data, L"", NULL, NULL, NULL, 0,
28 &encrypted_data))
29 LOG(ERROR) << "Encryption fails: " << data;
30
31 vector<uint8> result(encrypted_data.pbData,
32 encrypted_data.pbData + encrypted_data.cbData);
33 LocalFree(encrypted_data.pbData);
34 return result;
35 }
36
DecryptData(const vector<uint8> & in_data,string * out_data)37 bool DecryptData(const vector<uint8>& in_data, string* out_data) {
38 DATA_BLOB encrypted_data, decrypted_data;
39 encrypted_data.pbData =
40 (in_data.empty() ? NULL : const_cast<BYTE*>(&in_data[0]));
41 encrypted_data.cbData = in_data.size();
42 LPWSTR descrip = L"";
43
44 if (!CryptUnprotectData(&encrypted_data, &descrip, NULL, NULL, NULL, 0,
45 &decrypted_data)) {
46 LOG(ERROR) << "Decryption fails: ";
47 return false;
48 } else {
49 out_data->assign(reinterpret_cast<const char*>(decrypted_data.pbData),
50 decrypted_data.cbData);
51 LocalFree(decrypted_data.pbData);
52 return true;
53 }
54 }
55