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2f5a215771
Differential Revision: https://phabricator.services.mozilla.com/D44269 --HG-- extra : moz-landing-system : lando
151 lines
4.3 KiB
C++
151 lines
4.3 KiB
C++
/*
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* Copyright 2015, Mozilla Foundation and contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ClearKeyPersistence.h"
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#include "ClearKeyUtils.h"
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#include "ClearKeyStorage.h"
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#include "ClearKeySessionManager.h"
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#include "RefCounted.h"
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#include <assert.h>
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#include <stdint.h>
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#include <sstream>
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#include <string.h>
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using namespace cdm;
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using std::function;
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using std::string;
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using std::stringstream;
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using std::vector;
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void ClearKeyPersistence::ReadAllRecordsFromIndex(
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function<void()>&& aOnComplete) {
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// Clear what we think the index file contains, we're about to read it again.
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mPersistentSessionIds.clear();
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// Hold a reference to the persistence manager, so it isn't released before
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// we try and use it.
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RefPtr<ClearKeyPersistence> self(this);
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function<void(const uint8_t*, uint32_t)> onIndexSuccess =
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[self, aOnComplete](const uint8_t* data, uint32_t size) {
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CK_LOGD("ClearKeyPersistence: Loaded index file!");
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const char* charData = (const char*)data;
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stringstream ss(string(charData, charData + size));
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string name;
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while (getline(ss, name)) {
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if (ClearKeyUtils::IsValidSessionId(name.data(), name.size())) {
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self->mPersistentSessionIds.insert(atoi(name.c_str()));
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}
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}
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self->mPersistentKeyState = PersistentKeyState::LOADED;
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aOnComplete();
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};
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function<void()> onIndexFailed = [self, aOnComplete]() {
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CK_LOGD(
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"ClearKeyPersistence: Failed to load index file (it might not exist");
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self->mPersistentKeyState = PersistentKeyState::LOADED;
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aOnComplete();
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};
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string filename = "index";
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ReadData(mHost, filename, move(onIndexSuccess), move(onIndexFailed));
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}
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void ClearKeyPersistence::WriteIndex() {
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function<void()> onIndexSuccess = []() {
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CK_LOGD("ClearKeyPersistence: Wrote index file");
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};
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function<void()> onIndexFail = []() {
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CK_LOGD("ClearKeyPersistence: Failed to write index file (this is bad)");
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};
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stringstream ss;
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for (const uint32_t& sessionId : mPersistentSessionIds) {
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ss << sessionId;
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ss << '\n';
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}
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string dataString = ss.str();
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uint8_t* dataArray = (uint8_t*)dataString.data();
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vector<uint8_t> data(dataArray, dataArray + dataString.size());
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string filename = "index";
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WriteData(mHost, filename, data, move(onIndexSuccess), move(onIndexFail));
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}
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ClearKeyPersistence::ClearKeyPersistence(Host_10* aHost) {
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this->mHost = aHost;
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}
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void ClearKeyPersistence::EnsureInitialized(bool aPersistentStateAllowed,
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function<void()>&& aOnInitialized) {
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if (aPersistentStateAllowed &&
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mPersistentKeyState == PersistentKeyState::UNINITIALIZED) {
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mPersistentKeyState = LOADING;
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ReadAllRecordsFromIndex(move(aOnInitialized));
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} else {
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mPersistentKeyState = PersistentKeyState::LOADED;
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aOnInitialized();
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}
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}
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bool ClearKeyPersistence::IsLoaded() const {
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return mPersistentKeyState == PersistentKeyState::LOADED;
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}
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string ClearKeyPersistence::GetNewSessionId(SessionType aSessionType) {
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static uint32_t sNextSessionId = 1;
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// Ensure we don't re-use a session id that was persisted.
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while (Contains(mPersistentSessionIds, sNextSessionId)) {
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sNextSessionId++;
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}
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string sessionId;
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stringstream ss;
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ss << sNextSessionId;
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ss >> sessionId;
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if (aSessionType == SessionType::kPersistentLicense) {
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mPersistentSessionIds.insert(sNextSessionId);
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// Save the updated index file.
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WriteIndex();
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}
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sNextSessionId++;
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return sessionId;
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}
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bool ClearKeyPersistence::IsPersistentSessionId(const string& aSessionId) {
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return Contains(mPersistentSessionIds, atoi(aSessionId.c_str()));
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}
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void ClearKeyPersistence::PersistentSessionRemoved(string& aSessionId) {
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mPersistentSessionIds.erase(atoi(aSessionId.c_str()));
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// Update the index file.
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WriteIndex();
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}
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