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| 1 // Copyright 2014 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 "components/encryptor/encryptor.h" | |
| 6 | |
| 7 #include <windows.h> | |
| 8 #include <wincrypt.h> | |
| 9 #include "base/strings/utf_string_conversions.h" | |
| 10 | |
| 11 #pragma comment(lib, "crypt32.lib") | |
| 12 | |
| 13 bool Encryptor::EncryptString16(const base::string16& plaintext, | |
| 14 std::string* ciphertext) { | |
| 15 return EncryptString(base::UTF16ToUTF8(plaintext), ciphertext); | |
| 16 } | |
| 17 | |
| 18 bool Encryptor::DecryptString16(const std::string& ciphertext, | |
| 19 base::string16* plaintext) { | |
| 20 std::string utf8; | |
| 21 if (!DecryptString(ciphertext, &utf8)) | |
| 22 return false; | |
| 23 | |
| 24 *plaintext = base::UTF8ToUTF16(utf8); | |
| 25 return true; | |
| 26 } | |
| 27 | |
| 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 | |
| 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 } | |
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