| /* |
| * Copyright (C) 2013 Apple Inc. All rights reserved. |
| * |
| * 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. |
| */ |
| |
| #include "config.h" |
| #include "WebKitMediaKeySession.h" |
| |
| #if ENABLE(LEGACY_ENCRYPTED_MEDIA) |
| |
| #include "Document.h" |
| #include "EventNames.h" |
| #include "FileSystem.h" |
| #include "Page.h" |
| #include "SecurityOriginData.h" |
| #include "Settings.h" |
| #include "WebKitMediaKeyError.h" |
| #include "WebKitMediaKeyMessageEvent.h" |
| #include "WebKitMediaKeys.h" |
| |
| namespace WebCore { |
| |
| Ref<WebKitMediaKeySession> WebKitMediaKeySession::create(ScriptExecutionContext& context, WebKitMediaKeys& keys, const String& keySystem) |
| { |
| auto session = adoptRef(*new WebKitMediaKeySession(context, keys, keySystem)); |
| session->suspendIfNeeded(); |
| return session; |
| } |
| |
| WebKitMediaKeySession::WebKitMediaKeySession(ScriptExecutionContext& context, WebKitMediaKeys& keys, const String& keySystem) |
| : ActiveDOMObject(&context) |
| , m_keys(&keys) |
| , m_keySystem(keySystem) |
| , m_asyncEventQueue(*this) |
| , m_session(keys.cdm().createSession(*this)) |
| , m_keyRequestTimer(*this, &WebKitMediaKeySession::keyRequestTimerFired) |
| , m_addKeyTimer(*this, &WebKitMediaKeySession::addKeyTimerFired) |
| { |
| } |
| |
| WebKitMediaKeySession::~WebKitMediaKeySession() |
| { |
| if (m_session) |
| m_session->setClient(nullptr); |
| |
| m_asyncEventQueue.cancelAllEvents(); |
| } |
| |
| void WebKitMediaKeySession::close() |
| { |
| if (m_session) |
| m_session->releaseKeys(); |
| } |
| |
| RefPtr<ArrayBuffer> WebKitMediaKeySession::cachedKeyForKeyId(const String& keyId) const |
| { |
| return m_session ? m_session->cachedKeyForKeyID(keyId) : nullptr; |
| } |
| |
| const String& WebKitMediaKeySession::sessionId() const |
| { |
| return m_session->sessionId(); |
| } |
| |
| void WebKitMediaKeySession::generateKeyRequest(const String& mimeType, Ref<Uint8Array>&& initData) |
| { |
| m_pendingKeyRequests.append({ mimeType, WTFMove(initData) }); |
| m_keyRequestTimer.startOneShot(0_s); |
| } |
| |
| void WebKitMediaKeySession::keyRequestTimerFired() |
| { |
| ASSERT(m_pendingKeyRequests.size()); |
| if (!m_session) |
| return; |
| |
| while (!m_pendingKeyRequests.isEmpty()) { |
| auto request = m_pendingKeyRequests.takeFirst(); |
| |
| // NOTE: Continued from step 5 in MediaKeys::createSession(). |
| // The user agent will asynchronously execute the following steps in the task: |
| |
| // 1. Let cdm be the cdm loaded in the MediaKeys constructor. |
| // 2. Let destinationURL be null. |
| String destinationURL; |
| WebKitMediaKeyError::Code errorCode = 0; |
| uint32_t systemCode = 0; |
| |
| // 3. Use cdm to generate a key request and follow the steps for the first matching condition from the following list: |
| |
| auto keyRequest = m_session->generateKeyRequest(request.mimeType, request.initData.ptr(), destinationURL, errorCode, systemCode); |
| |
| // Otherwise [if a request is not successfully generated]: |
| if (errorCode) { |
| // 3.1. Create a new MediaKeyError object with the following attributes: |
| // code = the appropriate MediaKeyError code |
| // systemCode = a Key System-specific value, if provided, and 0 otherwise |
| // 3.2. Set the MediaKeySession object's error attribute to the error object created in the previous step. |
| // 3.3. queue a task to fire a simple event named keyerror at the MediaKeySession object. |
| sendError(errorCode, systemCode); |
| // 3.4. Abort the task. |
| continue; |
| } |
| |
| // 4. queue a task to fire a simple event named keymessage at the new object |
| // The event is of type MediaKeyMessageEvent and has: |
| // message = key request |
| // destinationURL = destinationURL |
| if (keyRequest) |
| sendMessage(keyRequest.get(), destinationURL); |
| } |
| } |
| |
| ExceptionOr<void> WebKitMediaKeySession::update(Ref<Uint8Array>&& key) |
| { |
| // From <http://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/encrypted-media.html#dom-addkey>: |
| // The addKey(key) method must run the following steps: |
| // 1. If the first or second argument [sic] is an empty array, throw an InvalidAccessError. |
| // NOTE: the reference to a "second argument" is a spec bug. |
| if (!key->length()) |
| return Exception { InvalidAccessError }; |
| |
| // 2. Schedule a task to handle the call, providing key. |
| m_pendingKeys.append(WTFMove(key)); |
| m_addKeyTimer.startOneShot(0_s); |
| |
| return { }; |
| } |
| |
| void WebKitMediaKeySession::addKeyTimerFired() |
| { |
| ASSERT(m_pendingKeys.size()); |
| if (!m_session) |
| return; |
| |
| while (!m_pendingKeys.isEmpty()) { |
| auto pendingKey = m_pendingKeys.takeFirst(); |
| unsigned short errorCode = 0; |
| uint32_t systemCode = 0; |
| |
| // NOTE: Continued from step 2. of MediaKeySession::update() |
| // 2.1. Let cdm be the cdm loaded in the MediaKeys constructor. |
| // NOTE: This is m_session. |
| // 2.2. Let 'did store key' be false. |
| bool didStoreKey = false; |
| // 2.3. Let 'next message' be null. |
| RefPtr<Uint8Array> nextMessage; |
| // 2.4. Use cdm to handle key. |
| didStoreKey = m_session->update(pendingKey.ptr(), nextMessage, errorCode, systemCode); |
| // 2.5. If did store key is true and the media element is waiting for a key, queue a task to attempt to resume playback. |
| // TODO: Find and restart the media element |
| |
| // 2.6. If next message is not null, queue a task to fire a simple event named keymessage at the MediaKeySession object. |
| // The event is of type MediaKeyMessageEvent and has: |
| // message = next message |
| // destinationURL = null |
| if (nextMessage) |
| sendMessage(nextMessage.get(), emptyString()); |
| |
| // 2.7. If did store key is true, queue a task to fire a simple event named keyadded at the MediaKeySession object. |
| if (didStoreKey) { |
| auto keyaddedEvent = Event::create(eventNames().webkitkeyaddedEvent, false, false); |
| keyaddedEvent->setTarget(this); |
| m_asyncEventQueue.enqueueEvent(WTFMove(keyaddedEvent)); |
| |
| ASSERT(m_keys); |
| m_keys->keyAdded(); |
| } |
| |
| // 2.8. If any of the preceding steps in the task failed |
| if (errorCode) { |
| // 2.8.1. Create a new MediaKeyError object with the following attributes: |
| // code = the appropriate MediaKeyError code |
| // systemCode = a Key System-specific value, if provided, and 0 otherwise |
| // 2.8.2. Set the MediaKeySession object's error attribute to the error object created in the previous step. |
| // 2.8.3. queue a task to fire a simple event named keyerror at the MediaKeySession object. |
| sendError(errorCode, systemCode); |
| // 2.8.4. Abort the task. |
| // NOTE: no-op |
| } |
| } |
| } |
| |
| void WebKitMediaKeySession::sendMessage(Uint8Array* message, String destinationURL) |
| { |
| auto event = WebKitMediaKeyMessageEvent::create(eventNames().webkitkeymessageEvent, message, destinationURL); |
| event->setTarget(this); |
| m_asyncEventQueue.enqueueEvent(WTFMove(event)); |
| } |
| |
| void WebKitMediaKeySession::sendError(MediaKeyErrorCode errorCode, uint32_t systemCode) |
| { |
| m_error = WebKitMediaKeyError::create(errorCode, systemCode); |
| |
| auto keyerrorEvent = Event::create(eventNames().webkitkeyerrorEvent, false, false); |
| keyerrorEvent->setTarget(this); |
| m_asyncEventQueue.enqueueEvent(WTFMove(keyerrorEvent)); |
| } |
| |
| String WebKitMediaKeySession::mediaKeysStorageDirectory() const |
| { |
| auto* document = downcast<Document>(scriptExecutionContext()); |
| if (!document) |
| return emptyString(); |
| |
| auto* page = document->page(); |
| if (!page || page->usesEphemeralSession()) |
| return emptyString(); |
| |
| auto storageDirectory = document->settings().mediaKeysStorageDirectory(); |
| if (storageDirectory.isEmpty()) |
| return emptyString(); |
| |
| return FileSystem::pathByAppendingComponent(storageDirectory, document->securityOrigin().data().databaseIdentifier()); |
| } |
| |
| bool WebKitMediaKeySession::hasPendingActivity() const |
| { |
| return (m_keys && m_session) || m_asyncEventQueue.hasPendingEvents(); |
| } |
| |
| void WebKitMediaKeySession::stop() |
| { |
| close(); |
| } |
| |
| const char* WebKitMediaKeySession::activeDOMObjectName() const |
| { |
| return "WebKitMediaKeySession"; |
| } |
| |
| bool WebKitMediaKeySession::canSuspendForDocumentSuspension() const |
| { |
| // FIXME: We should try and do better here. |
| return false; |
| } |
| |
| } |
| |
| #endif |