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/*
* Copyright (C) 2016 Metrological Group B.V.
* Copyright (C) 2016 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(ENCRYPTED_MEDIA)
#include "CDMFactory.h"
#include "CDMInstanceSession.h"
#include "CDMPrivate.h"
#include "CDMProxy.h"
#include "SharedBuffer.h"
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace ClearKey {
// ClearKey CENC SystemID.
// https://www.w3.org/TR/eme-initdata-cenc/#common-system
constexpr std::array<uint8_t, 16> cencSystemId { 0x10, 0x77, 0xef, 0xec, 0xc0, 0xb2, 0x4d, 0x02, 0xac, 0xe3, 0x3c, 0x1e, 0x52, 0xe2, 0xfb, 0x4b };
enum {
AES128CTRBlockSizeInBytes = 16,
KeyIDSizeInBytes = 16,
IVSizeInBytes = 16,
};
} // namespace ClearKey
class CDMFactoryClearKey final : public CDMFactory {
WTF_MAKE_TZONE_ALLOCATED(CDMFactoryClearKey);
public:
static CDMFactoryClearKey& singleton();
virtual ~CDMFactoryClearKey();
std::unique_ptr<CDMPrivate> createCDM(const String& keySystem, const String& mediaKeysHashSalt, const CDMPrivateClient&) final;
bool supportsKeySystem(const String&) final;
private:
friend class NeverDestroyed<CDMFactoryClearKey>;
CDMFactoryClearKey();
};
class CDMPrivateClearKey final : public CDMPrivate {
WTF_MAKE_TZONE_ALLOCATED(CDMPrivateClearKey);
public:
CDMPrivateClearKey();
virtual ~CDMPrivateClearKey();
Vector<AtomString> supportedInitDataTypes() const final;
Vector<AtomString> supportedRobustnesses() const final;
bool supportsConfiguration(const CDMKeySystemConfiguration&) const final;
bool supportsConfigurationWithRestrictions(const CDMKeySystemConfiguration&, const CDMRestrictions&) const final;
bool supportsSessionTypeWithConfiguration(const CDMSessionType&, const CDMKeySystemConfiguration&) const final;
CDMRequirement distinctiveIdentifiersRequirement(const CDMKeySystemConfiguration&, const CDMRestrictions&) const final;
CDMRequirement persistentStateRequirement(const CDMKeySystemConfiguration&, const CDMRestrictions&) const final;
bool distinctiveIdentifiersAreUniquePerOriginAndClearable(const CDMKeySystemConfiguration&) const final;
RefPtr<CDMInstance> createInstance() final;
void loadAndInitialize() final;
bool supportsServerCertificates() const final;
bool supportsSessions() const final;
bool supportsInitData(const AtomString&, const SharedBuffer&) const final;
RefPtr<SharedBuffer> sanitizeResponse(const SharedBuffer&) const final;
std::optional<String> sanitizeSessionId(const String&) const final;
};
class CDMInstanceClearKey final : public CDMInstanceProxy {
public:
CDMInstanceClearKey();
virtual ~CDMInstanceClearKey();
uint32_t getNextSessionIdValue() { return m_nextSessionIdValue++; }
// CDMInstance
ImplementationType implementationType() const final { return ImplementationType::ClearKey; }
void initializeWithConfiguration(const CDMKeySystemConfiguration&, AllowDistinctiveIdentifiers, AllowPersistentState, SuccessCallback&&) final;
void setServerCertificate(Ref<SharedBuffer>&&, SuccessCallback&&) final;
void setStorageDirectory(const String&) final;
const String& keySystem() const final;
RefPtr<CDMInstanceSession> createSession() final;
private:
uint32_t m_nextSessionIdValue { 0 };
};
class CDMInstanceSessionClearKey final : public CDMInstanceSessionProxy {
public:
CDMInstanceSessionClearKey(CDMInstanceClearKey& parent)
: CDMInstanceSessionProxy(parent) { }
void requestLicense(LicenseType, KeyGroupingStrategy, const AtomString& initDataType, Ref<SharedBuffer>&& initData, LicenseCallback&&) final;
void updateLicense(const String&, LicenseType, Ref<SharedBuffer>&&, LicenseUpdateCallback&&) final;
void loadSession(LicenseType, const String&, const String&, LoadSessionCallback&&) final;
void closeSession(const String&, CloseSessionCallback&&) final;
void removeSessionData(const String&, LicenseType, RemoveSessionDataCallback&&) final;
void storeRecordOfKeyUsage(const String&) final;
private:
RefPtr<CDMInstanceClearKey> protectedParentInstance() const;
String m_sessionID;
KeyStore m_keyStore;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_CDM_INSTANCE(WebCore::CDMInstanceClearKey, WebCore::CDMInstance::ImplementationType::ClearKey);
#endif // ENABLE(ENCRYPTED_MEDIA)
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