1/*
2 * Copyright (C) 2017 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 "CryptoAlgorithmHKDF.h"
28
29#if ENABLE(WEB_CRYPTO)
30
31#include "CryptoAlgorithmHkdfParams.h"
32#include "CryptoKeyRaw.h"
33#include <JavaScriptCore/JSCJSValueInlines.h>
34#include <wtf/CrossThreadCopier.h>
35
36namespace WebCore {
37
38Ref<CryptoAlgorithm> CryptoAlgorithmHKDF::create()
39{
40 return adoptRef(*new CryptoAlgorithmHKDF);
41}
42
43CryptoAlgorithmIdentifier CryptoAlgorithmHKDF::identifier() const
44{
45 return s_identifier;
46}
47
48void CryptoAlgorithmHKDF::deriveBits(const CryptoAlgorithmParameters& parameters, Ref<CryptoKey>&& baseKey, size_t length, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
49{
50 if (!length || length % 8) {
51 exceptionCallback(OperationError);
52 return;
53 }
54
55 dispatchOperationInWorkQueue(workQueue, context, WTFMove(callback), WTFMove(exceptionCallback),
56 [parameters = crossThreadCopy(downcast<CryptoAlgorithmHkdfParams>(parameters)), baseKey = WTFMove(baseKey), length] {
57 return platformDeriveBits(parameters, downcast<CryptoKeyRaw>(baseKey.get()), length);
58 });
59}
60
61void CryptoAlgorithmHKDF::importKey(CryptoKeyFormat format, KeyData&& data, const CryptoAlgorithmParameters& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyCallback&& callback, ExceptionCallback&& exceptionCallback)
62{
63 if (format != CryptoKeyFormat::Raw) {
64 exceptionCallback(NotSupportedError);
65 return;
66 }
67 if (usages & (CryptoKeyUsageEncrypt | CryptoKeyUsageDecrypt | CryptoKeyUsageSign | CryptoKeyUsageVerify | CryptoKeyUsageWrapKey | CryptoKeyUsageUnwrapKey)) {
68 exceptionCallback(SyntaxError);
69 return;
70 }
71 if (extractable) {
72 exceptionCallback(SyntaxError);
73 return;
74 }
75
76 callback(CryptoKeyRaw::create(parameters.identifier, WTFMove(WTF::get<Vector<uint8_t>>(data)), usages));
77}
78
79ExceptionOr<size_t> CryptoAlgorithmHKDF::getKeyLength(const CryptoAlgorithmParameters&)
80{
81 return 0;
82}
83
84} // namespace WebCore
85
86#endif // ENABLE(WEB_CRYPTO)
87