1/*
2 * Copyright (C) 2016 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#if ENABLE(ENCRYPTED_MEDIA)
29
30#include "ContextDestructionObserver.h"
31#include "MediaKeySessionType.h"
32#include "MediaKeySystemConfiguration.h"
33#include "MediaKeySystemMediaCapability.h"
34#include "MediaKeysRestrictions.h"
35#include "SharedBuffer.h"
36#include <wtf/Function.h>
37#include <wtf/HashSet.h>
38#include <wtf/Ref.h>
39#include <wtf/RefCounted.h>
40#include <wtf/WeakPtr.h>
41#include <wtf/text/WTFString.h>
42
43namespace WebCore {
44
45class CDMFactory;
46class CDMInstance;
47class CDMPrivate;
48class Document;
49class ScriptExecutionContext;
50class SharedBuffer;
51
52class CDM : public RefCounted<CDM>, public CanMakeWeakPtr<CDM>, private ContextDestructionObserver {
53public:
54 static bool supportsKeySystem(const String&);
55 static bool isPersistentType(MediaKeySessionType);
56
57 static Ref<CDM> create(Document&, const String& keySystem);
58 ~CDM();
59
60 using SupportedConfigurationCallback = WTF::Function<void(Optional<MediaKeySystemConfiguration>)>;
61 void getSupportedConfiguration(MediaKeySystemConfiguration&& candidateConfiguration, SupportedConfigurationCallback&&);
62
63 const String& keySystem() const { return m_keySystem; }
64
65 void loadAndInitialize();
66 RefPtr<CDMInstance> createInstance();
67 bool supportsServerCertificates() const;
68 bool supportsSessions() const;
69 bool supportsInitDataType(const AtomicString&) const;
70
71 RefPtr<SharedBuffer> sanitizeInitData(const AtomicString& initDataType, const SharedBuffer&);
72 bool supportsInitData(const AtomicString& initDataType, const SharedBuffer&);
73
74 RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&);
75
76 Optional<String> sanitizeSessionId(const String& sessionId);
77
78 String storageDirectory() const;
79
80private:
81 CDM(Document&, const String& keySystem);
82
83 enum class ConfigurationStatus {
84 Supported,
85 NotSupported,
86 ConsentDenied,
87 };
88
89 enum class ConsentStatus {
90 ConsentDenied,
91 InformUser,
92 Allowed,
93 };
94
95 enum class AudioVideoType {
96 Audio,
97 Video,
98 };
99
100 void doSupportedConfigurationStep(MediaKeySystemConfiguration&& candidateConfiguration, MediaKeysRestrictions&&, SupportedConfigurationCallback&&);
101 Optional<MediaKeySystemConfiguration> getSupportedConfiguration(const MediaKeySystemConfiguration& candidateConfiguration, MediaKeysRestrictions&);
102 Optional<Vector<MediaKeySystemMediaCapability>> getSupportedCapabilitiesForAudioVideoType(AudioVideoType, const Vector<MediaKeySystemMediaCapability>& requestedCapabilities, const MediaKeySystemConfiguration& partialConfiguration, MediaKeysRestrictions&);
103
104 using ConsentStatusCallback = WTF::Function<void(ConsentStatus, MediaKeySystemConfiguration&&, MediaKeysRestrictions&&)>;
105 void getConsentStatus(MediaKeySystemConfiguration&& accumulatedConfiguration, MediaKeysRestrictions&&, ConsentStatusCallback&&);
106 String m_keySystem;
107 std::unique_ptr<CDMPrivate> m_private;
108};
109
110}
111
112#endif
113