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