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