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+/*
+ * Copyright 2015, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __ClearKeyDecryptor_h__
+#define __ClearKeyDecryptor_h__
+
+// This include is required in order for content_decryption_module to work
+// on Unix systems.
+#include <stddef.h>
+
+#include <functional>
+#include <map>
+#include <optional>
+#include <queue>
+#include <set>
+#include <string>
+
+#include "content_decryption_module.h"
+
+#include "ClearKeyDecryptionManager.h"
+#include "ClearKeyPersistence.h"
+#include "ClearKeySession.h"
+#include "ClearKeyUtils.h"
+#include "RefCounted.h"
+#include "mozilla/TimeStamp.h"
+
+class ClearKeySessionManager final : public RefCounted {
+ public:
+ explicit ClearKeySessionManager(cdm::Host_10* aHost);
+
+ void Init(bool aDistinctiveIdentifierAllowed, bool aPersistentStateAllowed);
+
+ void CreateSession(uint32_t aPromiseId, cdm::InitDataType aInitDataType,
+ const uint8_t* aInitData, uint32_t aInitDataSize,
+ cdm::SessionType aSessionType);
+
+ void LoadSession(uint32_t aPromiseId, const char* aSessionId,
+ uint32_t aSessionIdLength);
+
+ void UpdateSession(uint32_t aPromiseId, const char* aSessionId,
+ uint32_t aSessionIdLength, const uint8_t* aResponse,
+ uint32_t aResponseSize);
+
+ void CloseSession(uint32_t aPromiseId, const char* aSessionId,
+ uint32_t aSessionIdLength);
+
+ void RemoveSession(uint32_t aPromiseId, const char* aSessionId,
+ uint32_t aSessionIdLength);
+
+ void SetServerCertificate(uint32_t aPromiseId, const uint8_t* aServerCert,
+ uint32_t aServerCertSize);
+
+ cdm::Status Decrypt(const cdm::InputBuffer_2& aBuffer,
+ cdm::DecryptedBlock* aDecryptedBlock);
+
+ void DecryptingComplete();
+
+ void PersistentSessionDataLoaded(uint32_t aPromiseId,
+ const std::string& aSessionId,
+ const uint8_t* aKeyData,
+ uint32_t aKeyDataSize);
+
+ // Receives the result of an output protection query from the user agent.
+ // This may trigger a key status change.
+ // @param aResult indicates if the query succeeded or not. If a query did
+ // not succeed then that other arguments are ignored.
+ // @param aLinkMask is used to indicate if output could be captured by the
+ // user agent. It should be set to `kLinkTypeNetwork` if capture is possible,
+ // otherwise it should be zero.
+ // @param aOutputProtectionMask this argument is unused.
+ void OnQueryOutputProtectionStatus(cdm::QueryResult aResult,
+ uint32_t aLinkMask,
+ uint32_t aOutputProtectionMask);
+
+ // Prompts the session manager to query the output protection status if we
+ // haven't yet, or if enough time has passed since the last check. Will also
+ // notify if a check has not been responded to on time.
+ void QueryOutputProtectionStatusIfNeeded();
+
+ private:
+ ~ClearKeySessionManager();
+
+ void ClearInMemorySessionData(ClearKeySession* aSession);
+ bool MaybeDeferTillInitialized(std::function<void()>&& aMaybeDefer);
+ void Serialize(const ClearKeySession* aSession,
+ std::vector<uint8_t>& aOutKeyData);
+
+ // Signals the host to perform an output protection check.
+ void QueryOutputProtectionStatusFromHost();
+
+ // Called to notify the result of an output protection status call. The
+ // following arguments are expected, along with their intended use:
+ // - KeyStatus::kUsable indicates that the query was responded to and the
+ // response showed output is protected.
+ // - KeyStatus::kOutputRestricted indicates that the query was responded to
+ // and the response showed output is not protected.
+ // - KeyStatus::kInternalError indicates a query was not repsonded to on
+ // time, or that a query was responded to with a failed cdm::QueryResult.
+ // The status passed to this function will be used to update the status of
+ // the keyId "output-protection", which tests an observe.
+ void NotifyOutputProtectionStatus(cdm::KeyStatus aStatus);
+
+ RefPtr<ClearKeyDecryptionManager> mDecryptionManager;
+ RefPtr<ClearKeyPersistence> mPersistence;
+
+ cdm::Host_10* mHost = nullptr;
+
+ std::set<KeyId> mKeyIds;
+ std::map<std::string, ClearKeySession*> mSessions;
+
+ // The session id of the last session created or loaded from persistent
+ // storage. Used to fire test messages at that session.
+ std::optional<std::string> mLastSessionId;
+
+ std::queue<std::function<void()>> mDeferredInitialize;
+
+ // If there is an inflight query to the host to check the output protection
+ // status. Multiple in flight queries should not be allowed, avoid firing
+ // more if this is true.
+ bool mHasOutstandingOutputProtectionQuery = false;
+ // The last time the manager called QueryOutputProtectionStatus on the host.
+ mozilla::TimeStamp mLastOutputProtectionQueryTime;
+};
+
+#endif // __ClearKeyDecryptor_h__