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 "MockCDM.h"
28
29#if ENABLE(ENCRYPTED_MEDIA_V2)
30
31#include "CDM.h"
32#include "CDMSession.h"
33#include "MediaKeyError.h"
34#include <runtime/JSCInlines.h>
35#include <runtime/TypedArrayInlines.h>
36#include <runtime/Uint8Array.h>
37
38namespace WebCore {
39
40class MockCDMSession : public CDMSession {
41public:
42    MockCDMSession();
43    virtual ~MockCDMSession() { }
44
45    virtual void setClient(CDMSessionClient* client) { m_client = client; }
46    virtual const String& sessionId() const override { return m_sessionId; }
47    virtual PassRefPtr<Uint8Array> generateKeyRequest(const String& mimeType, Uint8Array* initData, String& destinationURL, unsigned short& errorCode, unsigned long& systemCode) override;
48    virtual void releaseKeys() override;
49    virtual bool update(Uint8Array*, RefPtr<Uint8Array>& nextMessage, unsigned short& errorCode, unsigned long& systemCode) override;
50
51protected:
52    CDMSessionClient* m_client;
53    String m_sessionId;
54};
55
56bool MockCDM::supportsKeySystem(const String& keySystem)
57{
58    return equalIgnoringCase(keySystem, "com.webcore.mock");
59}
60
61bool MockCDM::supportsKeySystemAndMimeType(const String& keySystem, const String& mimeType)
62{
63    if (!supportsKeySystem(keySystem))
64        return false;
65
66    return equalIgnoringCase(mimeType, "video/mock");
67}
68
69bool MockCDM::supportsMIMEType(const String& mimeType)
70{
71    return equalIgnoringCase(mimeType, "video/mock");
72}
73
74std::unique_ptr<CDMSession> MockCDM::createSession()
75{
76    return std::make_unique<MockCDMSession>();
77}
78
79static Uint8Array* initDataPrefix()
80{
81    const unsigned char prefixData[] = { 'm', 'o', 'c', 'k' };
82    static Uint8Array* prefix = Uint8Array::create(prefixData, WTF_ARRAY_LENGTH(prefixData)).leakRef();
83
84    return prefix;
85}
86
87static Uint8Array* keyPrefix()
88{
89    static const unsigned char prefixData[] = {'k', 'e', 'y'};
90    static Uint8Array* prefix = Uint8Array::create(prefixData, WTF_ARRAY_LENGTH(prefixData)).leakRef();
91
92    return prefix;
93}
94
95static Uint8Array* keyRequest()
96{
97    static const unsigned char requestData[] = {'r', 'e', 'q', 'u', 'e', 's', 't'};
98    static Uint8Array* request = Uint8Array::create(requestData, WTF_ARRAY_LENGTH(requestData)).leakRef();
99
100    return request;
101}
102
103static String generateSessionId()
104{
105    static int monotonicallyIncreasingSessionId = 0;
106    return String::number(monotonicallyIncreasingSessionId++);
107}
108
109MockCDMSession::MockCDMSession()
110    : m_sessionId(generateSessionId())
111{
112}
113
114PassRefPtr<Uint8Array> MockCDMSession::generateKeyRequest(const String&, Uint8Array* initData, String&, unsigned short& errorCode, unsigned long&)
115{
116    for (unsigned i = 0; i < initDataPrefix()->length(); ++i) {
117        if (!initData || i >= initData->length() || initData->item(i) != initDataPrefix()->item(i)) {
118            errorCode = MediaKeyError::MEDIA_KEYERR_UNKNOWN;
119            return 0;
120        }
121    }
122    return keyRequest();
123}
124
125void MockCDMSession::releaseKeys()
126{
127    // no-op
128}
129
130bool MockCDMSession::update(Uint8Array* key, RefPtr<Uint8Array>&, unsigned short& errorCode, unsigned long&)
131{
132    for (unsigned i = 0; i < keyPrefix()->length(); ++i) {
133        if (i >= key->length() || key->item(i) != keyPrefix()->item(i)) {
134            errorCode = MediaKeyError::MEDIA_KEYERR_CLIENT;
135            return false;
136        }
137    }
138    return true;
139}
140
141}
142
143#endif // ENABLE(ENCRYPTED_MEDIA_V2)
144