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#pragma once
27
28#include "BufferSource.h"
29#include "CryptoAlgorithmParameters.h"
30#include <wtf/Vector.h>
31
32#if ENABLE(WEB_CRYPTO)
33
34namespace WebCore {
35
36class CryptoAlgorithmAesGcmParams final : public CryptoAlgorithmParameters {
37public:
38 BufferSource iv;
39 // Use additionalDataVector() instead of additionalData. The label will be gone once additionalDataVector() is called.
40 mutable Optional<BufferSource::VariantType> additionalData;
41 mutable Optional<uint8_t> tagLength;
42
43 Class parametersClass() const final { return Class::AesGcmParams; }
44
45 const Vector<uint8_t>& ivVector() const
46 {
47 if (!m_ivVector.isEmpty() || !iv.length())
48 return m_ivVector;
49
50 m_ivVector.append(iv.data(), iv.length());
51 return m_ivVector;
52 }
53
54 const Vector<uint8_t>& additionalDataVector() const
55 {
56 if (!m_additionalDataVector.isEmpty() || !additionalData)
57 return m_additionalDataVector;
58
59 BufferSource additionalDataBuffer = WTFMove(*additionalData);
60 additionalData = WTF::nullopt;
61 if (!additionalDataBuffer.length())
62 return m_additionalDataVector;
63
64 m_additionalDataVector.append(additionalDataBuffer.data(), additionalDataBuffer.length());
65 return m_additionalDataVector;
66 }
67
68 CryptoAlgorithmAesGcmParams isolatedCopy() const
69 {
70 CryptoAlgorithmAesGcmParams result;
71 result.identifier = identifier;
72 result.m_ivVector = ivVector();
73 result.m_additionalDataVector = additionalDataVector();
74 result.tagLength = tagLength;
75
76 return result;
77 }
78
79private:
80 mutable Vector<uint8_t> m_ivVector;
81 mutable Vector<uint8_t> m_additionalDataVector;
82};
83
84} // namespace WebCore
85
86SPECIALIZE_TYPE_TRAITS_CRYPTO_ALGORITHM_PARAMETERS(AesGcmParams)
87
88#endif // ENABLE(WEB_CRYPTO)
89