168 lines
8.1 KiB
C++
168 lines
8.1 KiB
C++
/*
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* Copyright (C) 2016 Metrological Group B.V.
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* Copyright (C) 2016 Igalia S.L.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "NavigatorEME.h"
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#if ENABLE(ENCRYPTED_MEDIA)
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#include "CDM.h"
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#include "CDMLogging.h"
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#include "Document.h"
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#include "JSDOMPromiseDeferred.h"
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#include "JSMediaKeySystemAccess.h"
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#include "Logging.h"
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#include "MediaKeySystemRequest.h"
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#include <wtf/text/StringBuilder.h>
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namespace WTF {
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template<typename>
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struct LogArgument;
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template<typename T>
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struct LogArgument<Vector<T>> {
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static String toString(const Vector<T>& value)
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{
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StringBuilder builder;
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builder.append("[");
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for (auto item : value)
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builder.append(LogArgument<T>::toString(item));
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builder.append("]");
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return builder.toString();
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}
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};
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template<typename T>
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struct LogArgument<std::optional<T>> {
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static String toString(const std::optional<T>& value)
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{
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return value ? "nullopt"_s : LogArgument<T>::toString(value.value());
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}
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};
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}
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namespace WebCore {
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template<typename... Arguments>
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inline void infoLog(Logger& logger, const Arguments&... arguments)
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{
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#if !LOG_DISABLED || !RELEASE_LOG_DISABLED
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logger.info(LogEME, arguments...);
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#else
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UNUSED_PARAM(logger);
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#endif
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}
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static void tryNextSupportedConfiguration(RefPtr<CDM>&& implementation, Vector<MediaKeySystemConfiguration>&& supportedConfigurations, RefPtr<DeferredPromise>&&, Ref<Logger>&&, WTF::Logger::LogSiteIdentifier&&);
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void NavigatorEME::requestMediaKeySystemAccess(Navigator& navigator, Document& document, const String& keySystem, Vector<MediaKeySystemConfiguration>&& supportedConfigurations, Ref<DeferredPromise>&& promise)
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{
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// https://w3c.github.io/encrypted-media/#dom-navigator-requestmediakeysystemaccess
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// W3C Editor's Draft 09 November 2016
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auto identifier = WTF::Logger::LogSiteIdentifier("NavigatorEME", __func__, &navigator);
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Ref<Logger> logger = document.logger();
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infoLog(logger, identifier, "keySystem(", keySystem, "), supportedConfigurations(", supportedConfigurations, ")");
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// When this method is invoked, the user agent must run the following steps:
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// 1. If keySystem is the empty string, return a promise rejected with a newly created TypeError.
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// 2. If supportedConfigurations is empty, return a promise rejected with a newly created TypeError.
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if (keySystem.isEmpty() || supportedConfigurations.isEmpty()) {
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infoLog(logger, identifier, "Rejected: empty keySystem(", keySystem.isEmpty(), ") or empty supportedConfigurations(", supportedConfigurations.isEmpty(), ")");
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promise->reject(TypeError);
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return;
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}
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auto request = MediaKeySystemRequest::create(document, keySystem, WTFMove(promise));
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request->setAllowCallback([keySystem, supportedConfigurations = WTFMove(supportedConfigurations), &document, logger = WTFMove(logger), identifier = WTFMove(identifier)](Ref<DeferredPromise>&& promise) mutable {
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document.postTask([promise = WTFMove(promise), &document, keySystem, logger = WTFMove(logger), identifier = WTFMove(identifier), supportedConfigurations = WTFMove(supportedConfigurations)] (ScriptExecutionContext&) mutable {
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// 3. Let document be the calling context's Document.
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// 4. Let origin be the origin of document.
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// 5. Let promise be a new promise.
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// 6. Run the following steps in parallel:
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// 6.1. If keySystem is not one of the Key Systems supported by the user agent, reject promise with a NotSupportedError.
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// String comparison is case-sensitive.
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if (!CDM::supportsKeySystem(keySystem)) {
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infoLog(logger, identifier, "Rejected: keySystem(", keySystem, ") not supported");
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promise->reject(NotSupportedError);
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return;
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}
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// 6.2. Let implementation be the implementation of keySystem.
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auto implementation = CDM::create(document, keySystem);
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tryNextSupportedConfiguration(WTFMove(implementation), WTFMove(supportedConfigurations), WTFMove(promise), WTFMove(logger), WTFMove(identifier));
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});
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});
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request->start();
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}
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static void tryNextSupportedConfiguration(RefPtr<CDM>&& implementation, Vector<MediaKeySystemConfiguration>&& supportedConfigurations, RefPtr<DeferredPromise>&& promise, Ref<Logger>&& logger, WTF::Logger::LogSiteIdentifier&& identifier)
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{
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// 6.3. For each value in supportedConfigurations:
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if (!supportedConfigurations.isEmpty()) {
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// 6.3.1. Let candidate configuration be the value.
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// 6.3.2. Let supported configuration be the result of executing the Get Supported Configuration
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// algorithm on implementation, candidate configuration, and origin.
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MediaKeySystemConfiguration candidateConfiguration = WTFMove(supportedConfigurations.first());
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supportedConfigurations.remove(0);
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CDM::SupportedConfigurationCallback callback = [implementation = implementation, supportedConfigurations = WTFMove(supportedConfigurations), promise, logger = WTFMove(logger), identifier = WTFMove(identifier)] (std::optional<MediaKeySystemConfiguration> supportedConfiguration) mutable {
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// 6.3.3. If supported configuration is not NotSupported, run the following steps:
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if (supportedConfiguration) {
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// 6.3.3.1. Let access be a new MediaKeySystemAccess object, and initialize it as follows:
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// 6.3.3.1.1. Set the keySystem attribute to keySystem.
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// 6.3.3.1.2. Let the configuration value be supported configuration.
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// 6.3.3.1.3. Let the cdm implementation value be implementation.
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// Obtain reference to the key system string before the `implementation` RefPtr<> is cleared out.
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const String& keySystem = implementation->keySystem();
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auto access = MediaKeySystemAccess::create(keySystem, WTFMove(supportedConfiguration.value()), implementation.releaseNonNull());
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// 6.3.3.2. Resolve promise with access and abort the parallel steps of this algorithm.
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infoLog(logger, identifier, "Resolved: keySystem(", keySystem, "), supportedConfiguration(", supportedConfiguration, ")");
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promise->resolveWithNewlyCreated<IDLInterface<MediaKeySystemAccess>>(WTFMove(access));
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return;
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}
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tryNextSupportedConfiguration(WTFMove(implementation), WTFMove(supportedConfigurations), WTFMove(promise), WTFMove(logger), WTFMove(identifier));
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};
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implementation->getSupportedConfiguration(WTFMove(candidateConfiguration), WTFMove(callback));
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return;
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}
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// 6.4. Reject promise with a NotSupportedError.
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infoLog(logger, identifier, "Rejected: empty supportedConfigurations");
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promise->reject(NotSupportedError);
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}
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} // namespace WebCore
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#endif // ENABLE(ENCRYPTED_MEDIA)
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