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 } 55
