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/os_crypt/os_crypt.h" 6 7 #include <windows.h> 8 #include <wincrypt.h> 9 10 #include "base/strings/utf_string_conversions.h" 11 12 #pragma comment(lib, "crypt32.lib") 13 14 bool OSCrypt::EncryptString16(const base::string16& plaintext, 15 std::string* ciphertext) { 16 return EncryptString(base::UTF16ToUTF8(plaintext), ciphertext); 17 } 18 19 bool OSCrypt::DecryptString16(const std::string& ciphertext, 20 base::string16* plaintext) { 21 std::string utf8; 22 if (!DecryptString(ciphertext, &utf8)) 23 return false; 24 25 *plaintext = base::UTF8ToUTF16(utf8); 26 return true; 27 } 28 29 bool OSCrypt::EncryptString(const std::string& plaintext, 30 std::string* ciphertext) { 31 DATA_BLOB input; 32 input.pbData = const_cast<BYTE*>( 33 reinterpret_cast<const BYTE*>(plaintext.data())); 34 input.cbData = static_cast<DWORD>(plaintext.length()); 35 36 DATA_BLOB output; 37 BOOL result = CryptProtectData(&input, L"", NULL, NULL, NULL, 38 0, &output); 39 if (!result) 40 return false; 41 42 // this does a copy 43 ciphertext->assign(reinterpret_cast<std::string::value_type*>(output.pbData), 44 output.cbData); 45 46 LocalFree(output.pbData); 47 return true; 48 } 49 50 bool OSCrypt::DecryptString(const std::string& ciphertext, 51 std::string* plaintext) { 52 DATA_BLOB input; 53 input.pbData = const_cast<BYTE*>( 54 reinterpret_cast<const BYTE*>(ciphertext.data())); 55 input.cbData = static_cast<DWORD>(ciphertext.length()); 56 57 DATA_BLOB output; 58 BOOL result = CryptUnprotectData(&input, NULL, NULL, NULL, NULL, 59 0, &output); 60 if (!result) 61 return false; 62 63 plaintext->assign(reinterpret_cast<char*>(output.pbData), output.cbData); 64 LocalFree(output.pbData); 65 return true; 66 } 67
