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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 | |
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 | |
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 } | |
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