1 // Copyright (c) 2006-2008 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/password_manager/encryptor.h"
6
7 #include <windows.h>
8 #include <wincrypt.h>
9 #include "base/utf_string_conversions.h"
10
11 #pragma comment(lib, "crypt32.lib")
12
EncryptString16(const string16 & plaintext,std::string * ciphertext)13 bool Encryptor::EncryptString16(const string16& plaintext,
14 std::string* ciphertext) {
15 return EncryptString(UTF16ToUTF8(plaintext), ciphertext);
16 }
17
DecryptString16(const std::string & ciphertext,string16 * plaintext)18 bool Encryptor::DecryptString16(const std::string& ciphertext,
19 string16* plaintext) {
20 std::string utf8;
21 if (!DecryptString(ciphertext, &utf8))
22 return false;
23
24 *plaintext = UTF8ToUTF16(utf8);
25 return true;
26 }
27
EncryptString(const std::string & plaintext,std::string * ciphertext)28 bool Encryptor::EncryptString(const std::string& plaintext,
29 std::string* ciphertext) {
30 DATA_BLOB input;
31 input.pbData = const_cast<BYTE*>(
32 reinterpret_cast<const BYTE*>(plaintext.data()));
33 input.cbData = static_cast<DWORD>(plaintext.length());
34
35 DATA_BLOB output;
36 BOOL result = CryptProtectData(&input, L"", NULL, NULL, NULL,
37 0, &output);
38 if (!result)
39 return false;
40
41 // this does a copy
42 ciphertext->assign(reinterpret_cast<std::string::value_type*>(output.pbData),
43 output.cbData);
44
45 LocalFree(output.pbData);
46 return true;
47 }
48
DecryptString(const std::string & ciphertext,std::string * plaintext)49 bool Encryptor::DecryptString(const std::string& ciphertext,
50 std::string* plaintext) {
51 DATA_BLOB input;
52 input.pbData = const_cast<BYTE*>(
53 reinterpret_cast<const BYTE*>(ciphertext.data()));
54 input.cbData = static_cast<DWORD>(ciphertext.length());
55
56 DATA_BLOB output;
57 BOOL result = CryptUnprotectData(&input, NULL, NULL, NULL, NULL,
58 0, &output);
59 if (!result)
60 return false;
61
62 plaintext->assign(reinterpret_cast<char*>(output.pbData), output.cbData);
63 LocalFree(output.pbData);
64 return true;
65 }
66