1/*
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
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 "CtapHidAuthenticator.h"
28
29#if ENABLE(WEB_AUTHN) && PLATFORM(MAC)
30
31#include "CtapHidDriver.h"
32#include "U2fHidAuthenticator.h"
33#include <WebCore/DeviceRequestConverter.h>
34#include <WebCore/DeviceResponseConverter.h>
35#include <WebCore/ExceptionData.h>
36#include <wtf/RunLoop.h>
37#include <wtf/text/StringConcatenateNumbers.h>
38
39namespace WebKit {
40using namespace WebCore;
41using namespace fido;
42
43CtapHidAuthenticator::CtapHidAuthenticator(std::unique_ptr<CtapHidDriver>&& driver, AuthenticatorGetInfoResponse&& info)
44 : m_driver(WTFMove(driver))
45 , m_info(WTFMove(info))
46{
47 // FIXME(191520): We need a way to convert std::unique_ptr to UniqueRef.
48 ASSERT(m_driver);
49}
50
51void CtapHidAuthenticator::makeCredential()
52{
53 ASSERT(!m_isDowngraded);
54 auto cborCmd = encodeMakeCredenitalRequestAsCBOR(requestData().hash, requestData().creationOptions, m_info.options().userVerificationAvailability());
55 m_driver->transact(WTFMove(cborCmd), [weakThis = makeWeakPtr(*this)](Vector<uint8_t>&& data) {
56 ASSERT(RunLoop::isMain());
57 if (!weakThis)
58 return;
59 weakThis->continueMakeCredentialAfterResponseReceived(WTFMove(data));
60 });
61}
62
63void CtapHidAuthenticator::continueMakeCredentialAfterResponseReceived(Vector<uint8_t>&& data) const
64{
65 auto response = readCTAPMakeCredentialResponse(data);
66 if (!response) {
67 auto error = getResponseCode(data);
68 if (error == CtapDeviceResponseCode::kCtap2ErrCredentialExcluded)
69 receiveRespond(ExceptionData { InvalidStateError, "At least one credential matches an entry of the excludeCredentials list in the authenticator."_s });
70 else
71 receiveRespond(ExceptionData { UnknownError, makeString("Unknown internal error. Error code: ", static_cast<uint8_t>(error)) });
72 return;
73 }
74 receiveRespond(WTFMove(*response));
75}
76
77void CtapHidAuthenticator::getAssertion()
78{
79 ASSERT(!m_isDowngraded);
80 auto cborCmd = encodeGetAssertionRequestAsCBOR(requestData().hash, requestData().requestOptions, m_info.options().userVerificationAvailability());
81 m_driver->transact(WTFMove(cborCmd), [weakThis = makeWeakPtr(*this)](Vector<uint8_t>&& data) {
82 ASSERT(RunLoop::isMain());
83 if (!weakThis)
84 return;
85 weakThis->continueGetAssertionAfterResponseReceived(WTFMove(data));
86 });
87}
88
89void CtapHidAuthenticator::continueGetAssertionAfterResponseReceived(Vector<uint8_t>&& data)
90{
91 auto response = readCTAPGetAssertionResponse(data);
92 if (!response) {
93 auto error = getResponseCode(data);
94 if (error != CtapDeviceResponseCode::kCtap2ErrInvalidCBOR && tryDowngrade())
95 return;
96 receiveRespond(ExceptionData { UnknownError, makeString("Unknown internal error. Error code: ", static_cast<uint8_t>(error)) });
97 return;
98 }
99 receiveRespond(WTFMove(*response));
100}
101
102bool CtapHidAuthenticator::tryDowngrade()
103{
104 if (m_info.versions().find(ProtocolVersion::kU2f) == m_info.versions().end())
105 return false;
106 if (!observer())
107 return false;
108
109 m_isDowngraded = true;
110 m_driver->setProtocol(ProtocolVersion::kU2f);
111 observer()->downgrade(this, U2fHidAuthenticator::create(WTFMove(m_driver)));
112 return true;
113}
114
115} // namespace WebKit
116
117#endif // ENABLE(WEB_AUTHN) && PLATFORM(MAC)
118