1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "CryptoAlgorithmAES_KW.h" 28 29#if ENABLE(SUBTLE_CRYPTO) 30 31#include "CryptoKeyAES.h" 32#include "ExceptionCode.h" 33#include <CommonCrypto/CommonCrypto.h> 34 35namespace WebCore { 36 37void CryptoAlgorithmAES_KW::platformEncrypt(const CryptoKeyAES& key, const CryptoOperationData& data, VectorCallback callback, VoidCallback failureCallback, ExceptionCode&) 38{ 39 if (data.second % 8) { 40 // RFC 3394 uses 64-bit blocks as input. 41 // <rdar://problem/15949992> CommonCrypto doesn't detect incorrect data length, silently producing a bad cyphertext. 42 failureCallback(); 43 return; 44 } 45 46 Vector<uint8_t> result(CCSymmetricWrappedSize(kCCWRAPAES, data.second)); 47 size_t resultSize = result.size(); 48 int status = CCSymmetricKeyWrap(kCCWRAPAES, CCrfc3394_iv, CCrfc3394_ivLen, key.key().data(), key.key().size(), data.first, data.second, result.data(), &resultSize); 49 if (status) { 50 failureCallback(); 51 return; 52 } 53 result.shrink(resultSize); 54 callback(result); 55} 56 57void CryptoAlgorithmAES_KW::platformDecrypt(const CryptoKeyAES& key, const CryptoOperationData& data, VectorCallback callback, VoidCallback failureCallback, ExceptionCode&) 58{ 59 Vector<uint8_t> result(CCSymmetricUnwrappedSize(kCCWRAPAES, data.second)); 60 size_t resultSize = result.size(); 61 62 if (resultSize % 8) { 63 failureCallback(); 64 return; 65 } 66 67 int status = CCSymmetricKeyUnwrap(kCCWRAPAES, CCrfc3394_iv, CCrfc3394_ivLen, key.key().data(), key.key().size(), data.first, data.second, result.data(), &resultSize); 68 if (status) { 69 failureCallback(); 70 return; 71 } 72 result.shrink(resultSize); 73 callback(result); 74} 75 76} // namespace WebCore 77 78#endif // ENABLE(SUBTLE_CRYPTO) 79