1// Copyright 2017 The Chromium Authors. All rights reserved.
2// Copyright (C) 2018 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 are
6// met:
7//
8// * Redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer.
10// * Redistributions in binary form must reproduce the above
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12// in the documentation and/or other materials provided with the
13// distribution.
14// * Neither the name of Google Inc. nor the names of its
15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30#include "config.h"
31#include "ApduResponse.h"
32
33#include <wtf/Optional.h>
34
35#if ENABLE(WEB_AUTHN)
36
37namespace apdu {
38
39// static
40Optional<ApduResponse> ApduResponse::createFromMessage(const Vector<uint8_t>& data)
41{
42 // Invalid message size, data is appended by status byte.
43 if (data.size() < 2)
44 return WTF::nullopt;
45
46 uint16_t statusBytes = data[data.size() - 2] << 8;
47 statusBytes |= data[data.size() - 1];
48
49 Vector<uint8_t> newData;
50 newData.appendRange(data.begin(), data.end() - 2);
51 return ApduResponse(WTFMove(newData), static_cast<Status>(statusBytes));
52}
53
54ApduResponse::ApduResponse(Vector<uint8_t>&& data, Status responseStatus)
55 : m_data(WTFMove(data))
56 , m_responseStatus(responseStatus)
57{
58}
59
60Vector<uint8_t> ApduResponse::getEncodedResponse() const
61{
62 Vector<uint8_t> encodedResponse = m_data;
63 encodedResponse.append(static_cast<uint16_t>(m_responseStatus) >> 8 & 0xff);
64 encodedResponse.append(static_cast<uint16_t>(m_responseStatus) & 0xff);
65 return encodedResponse;
66}
67
68} // namespace apdu
69
70#endif // ENABLE(WEB_AUTHN)
71