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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/encryptor.h"
#include <windows.h>
#include <wincrypt.h>
#include "base/string_util.h"
#pragma comment(lib, "crypt32.lib")
bool Encryptor::EncryptWideString(const std::wstring& plaintext,
std::string* ciphertext) {
return EncryptString(WideToUTF8(plaintext), ciphertext);
}
bool Encryptor::DecryptWideString(const std::string& ciphertext,
std::wstring* plaintext){
std::string utf8;
if (!DecryptString(ciphertext, &utf8))
return false;
*plaintext = UTF8ToWide(utf8);
return true;
}
bool Encryptor::EncryptString(const std::string& plaintext,
std::string* ciphertext) {
DATA_BLOB input;
input.pbData = const_cast<BYTE*>(
reinterpret_cast<const BYTE*>(plaintext.data()));
input.cbData = static_cast<DWORD>(plaintext.length());
DATA_BLOB output;
BOOL result = CryptProtectData(&input, L"", NULL, NULL, NULL,
0, &output);
if (!result)
return false;
// this does a copy
ciphertext->assign(reinterpret_cast<std::string::value_type*>(output.pbData),
output.cbData);
LocalFree(output.pbData);
return true;
}
bool Encryptor::DecryptString(const std::string& ciphertext,
std::string* plaintext){
DATA_BLOB input;
input.pbData = const_cast<BYTE*>(
reinterpret_cast<const BYTE*>(ciphertext.data()));
input.cbData = static_cast<DWORD>(ciphertext.length());
DATA_BLOB output;
BOOL result = CryptUnprotectData(&input, NULL, NULL, NULL, NULL,
0, &output);
if(!result)
return false;
plaintext->assign(reinterpret_cast<char*>(output.pbData), output.cbData);
LocalFree(output.pbData);
return true;
}
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