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 "CryptoKeyAES.h" 28 29#if ENABLE(SUBTLE_CRYPTO) 30 31#include "CryptoAlgorithmDescriptionBuilder.h" 32#include "CryptoAlgorithmRegistry.h" 33#include "CryptoKeyDataOctetSequence.h" 34#include <wtf/text/WTFString.h> 35 36namespace WebCore { 37 38CryptoKeyAES::CryptoKeyAES(CryptoAlgorithmIdentifier algorithm, const Vector<uint8_t>& key, bool extractable, CryptoKeyUsage usage) 39 : CryptoKey(algorithm, CryptoKeyType::Secret, extractable, usage) 40 , m_key(key) 41{ 42 ASSERT(isValidAESAlgorithm(algorithm)); 43} 44 45CryptoKeyAES::~CryptoKeyAES() 46{ 47} 48 49bool CryptoKeyAES::isValidAESAlgorithm(CryptoAlgorithmIdentifier algorithm) 50{ 51 return algorithm == CryptoAlgorithmIdentifier::AES_CTR 52 || algorithm == CryptoAlgorithmIdentifier::AES_CBC 53 || algorithm == CryptoAlgorithmIdentifier::AES_CMAC 54 || algorithm == CryptoAlgorithmIdentifier::AES_GCM 55 || algorithm == CryptoAlgorithmIdentifier::AES_CFB 56 || algorithm == CryptoAlgorithmIdentifier::AES_KW; 57} 58 59PassRefPtr<CryptoKeyAES> CryptoKeyAES::generate(CryptoAlgorithmIdentifier algorithm, size_t lengthBits, bool extractable, CryptoKeyUsage usages) 60{ 61 if (lengthBits % 8) 62 return nullptr; 63 return adoptRef(new CryptoKeyAES(algorithm, randomData(lengthBits / 8), extractable, usages)); 64} 65 66void CryptoKeyAES::buildAlgorithmDescription(CryptoAlgorithmDescriptionBuilder& builder) const 67{ 68 CryptoKey::buildAlgorithmDescription(builder); 69 builder.add("length", m_key.size() * 8); 70} 71 72std::unique_ptr<CryptoKeyData> CryptoKeyAES::exportData() const 73{ 74 ASSERT(extractable()); 75 return CryptoKeyDataOctetSequence::create(m_key); 76} 77 78} // namespace WebCore 79 80#endif // ENABLE(SUBTLE_CRYPTO) 81