278 lines
10 KiB
C++
278 lines
10 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "chrome/renderer/media/chrome_key_systems.h"
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#include <stddef.h>
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#include <string>
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#include <vector>
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#include "base/logging.h"
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#include "base/strings/string16.h"
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#include "base/strings/string_split.h"
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#include "base/strings/utf_string_conversions.h"
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#include "chrome/common/widevine_cdm_messages.h"
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#include "components/cdm/renderer/widevine_key_system_properties.h"
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#include "content/public/renderer/render_thread.h"
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#include "media/base/eme_constants.h"
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#include "media/base/key_system_properties.h"
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// #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
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#include "third_party/widevine/cdm/stub/widevine_cdm_version.h"
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// The following must be after widevine_cdm_version.h.
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#if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
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#include <gnu/libc-version.h>
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#include "base/version.h"
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#endif
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using media::KeySystemProperties;
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using media::SupportedCodecs;
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#if BUILDFLAG(ENABLE_PEPPER_CDMS)
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static const char kExternalClearKeyPepperType[] =
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"application/x-ppapi-clearkey-cdm";
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static bool IsPepperCdmAvailable(
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const std::string& pepper_type,
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std::vector<base::string16>* additional_param_names,
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std::vector<base::string16>* additional_param_values) {
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bool is_available = false;
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content::RenderThread::Get()->Send(
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new ChromeViewHostMsg_IsInternalPluginAvailableForMimeType(
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pepper_type,
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&is_available,
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additional_param_names,
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additional_param_values));
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return is_available;
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}
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// KeySystemProperties implementation for external Clear Key systems.
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class ExternalClearKeyProperties : public KeySystemProperties {
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public:
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explicit ExternalClearKeyProperties(const std::string& key_system_name)
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: key_system_name_(key_system_name) {}
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std::string GetKeySystemName() const override { return key_system_name_; }
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bool IsSupportedInitDataType(
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media::EmeInitDataType init_data_type) const override {
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switch (init_data_type) {
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case media::EmeInitDataType::WEBM:
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case media::EmeInitDataType::KEYIDS:
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return true;
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case media::EmeInitDataType::CENC:
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#if BUILDFLAG(USE_PROPRIETARY_CODECS)
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return true;
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#else
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return false;
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#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
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case media::EmeInitDataType::UNKNOWN:
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return false;
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}
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NOTREACHED();
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return false;
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}
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SupportedCodecs GetSupportedCodecs() const override {
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#if BUILDFLAG(USE_PROPRIETARY_CODECS)
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return media::EME_CODEC_MP4_ALL | media::EME_CODEC_WEBM_ALL;
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#else
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return media::EME_CODEC_WEBM_ALL;
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#endif
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}
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media::EmeConfigRule GetRobustnessConfigRule(
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media::EmeMediaType media_type,
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const std::string& requested_robustness) const override {
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return requested_robustness.empty() ? media::EmeConfigRule::SUPPORTED
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: media::EmeConfigRule::NOT_SUPPORTED;
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}
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// Persistent license sessions are faked.
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media::EmeSessionTypeSupport GetPersistentLicenseSessionSupport()
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const override {
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return media::EmeSessionTypeSupport::SUPPORTED;
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}
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media::EmeSessionTypeSupport GetPersistentReleaseMessageSessionSupport()
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const override {
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return media::EmeSessionTypeSupport::NOT_SUPPORTED;
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}
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media::EmeFeatureSupport GetPersistentStateSupport() const override {
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return media::EmeFeatureSupport::REQUESTABLE;
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}
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media::EmeFeatureSupport GetDistinctiveIdentifierSupport() const override {
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return media::EmeFeatureSupport::NOT_SUPPORTED;
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}
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std::string GetPepperType() const override {
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return kExternalClearKeyPepperType;
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}
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private:
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const std::string key_system_name_;
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};
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// External Clear Key (used for testing).
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static void AddExternalClearKey(
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std::vector<std::unique_ptr<KeySystemProperties>>* concrete_key_systems) {
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static const char kExternalClearKeyKeySystem[] =
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"org.chromium.externalclearkey";
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static const char kExternalClearKeyDecryptOnlyKeySystem[] =
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"org.chromium.externalclearkey.decryptonly";
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static const char kExternalClearKeyFileIOTestKeySystem[] =
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"org.chromium.externalclearkey.fileiotest";
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static const char kExternalClearKeyInitializeFailKeySystem[] =
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"org.chromium.externalclearkey.initializefail";
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static const char kExternalClearKeyCrashKeySystem[] =
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"org.chromium.externalclearkey.crash";
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std::vector<base::string16> additional_param_names;
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std::vector<base::string16> additional_param_values;
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if (!IsPepperCdmAvailable(kExternalClearKeyPepperType,
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&additional_param_names,
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&additional_param_values)) {
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return;
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}
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concrete_key_systems->emplace_back(
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new ExternalClearKeyProperties(kExternalClearKeyKeySystem));
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// Add support of decrypt-only mode in ClearKeyCdm.
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concrete_key_systems->emplace_back(
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new ExternalClearKeyProperties(kExternalClearKeyDecryptOnlyKeySystem));
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// A key system that triggers FileIO test in ClearKeyCdm.
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concrete_key_systems->emplace_back(
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new ExternalClearKeyProperties(kExternalClearKeyFileIOTestKeySystem));
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// A key system that Chrome thinks is supported by ClearKeyCdm, but actually
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// will be refused by ClearKeyCdm. This is to test the CDM initialization
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// failure case.
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concrete_key_systems->emplace_back(
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new ExternalClearKeyProperties(kExternalClearKeyInitializeFailKeySystem));
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// A key system that triggers a crash in ClearKeyCdm.
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concrete_key_systems->emplace_back(
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new ExternalClearKeyProperties(kExternalClearKeyCrashKeySystem));
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}
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#if defined(WIDEVINE_CDM_AVAILABLE)
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// This function finds "codecs" and parses the value into the vector |codecs|.
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// Converts the codec strings to UTF-8 since we only expect ASCII strings and
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// this simplifies the rest of the code in this file.
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void GetSupportedCodecsForPepperCdm(
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const std::vector<base::string16>& additional_param_names,
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const std::vector<base::string16>& additional_param_values,
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std::vector<std::string>* codecs) {
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DCHECK(codecs->empty());
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DCHECK_EQ(additional_param_names.size(), additional_param_values.size());
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for (size_t i = 0; i < additional_param_names.size(); ++i) {
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if (additional_param_names[i] ==
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base::ASCIIToUTF16(kCdmSupportedCodecsParamName)) {
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const base::string16& codecs_string16 = additional_param_values[i];
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std::string codecs_string;
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if (!base::UTF16ToUTF8(codecs_string16.c_str(),
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codecs_string16.length(),
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&codecs_string)) {
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DLOG(WARNING) << "Non-UTF-8 codecs string.";
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// Continue using the best effort conversion.
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}
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*codecs = base::SplitString(
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codecs_string, std::string(1, kCdmSupportedCodecsValueDelimiter),
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base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
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break;
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}
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}
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}
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static void AddPepperBasedWidevine(
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std::vector<std::unique_ptr<KeySystemProperties>>* concrete_key_systems) {
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#if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
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Version glibc_version(gnu_get_libc_version());
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DCHECK(glibc_version.IsValid());
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if (glibc_version < base::Version(WIDEVINE_CDM_MIN_GLIBC_VERSION))
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return;
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#endif // defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
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std::vector<base::string16> additional_param_names;
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std::vector<base::string16> additional_param_values;
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if (!IsPepperCdmAvailable(kWidevineCdmPluginMimeType,
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&additional_param_names,
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&additional_param_values)) {
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DVLOG(1) << "Widevine CDM is not currently available.";
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return;
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}
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std::vector<std::string> codecs;
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GetSupportedCodecsForPepperCdm(additional_param_names,
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additional_param_values,
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&codecs);
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SupportedCodecs supported_codecs = media::EME_CODEC_NONE;
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// Audio codecs are always supported.
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// TODO(sandersd): Distinguish these from those that are directly supported,
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// as those may offer a higher level of protection.
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supported_codecs |= media::EME_CODEC_WEBM_OPUS;
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supported_codecs |= media::EME_CODEC_WEBM_VORBIS;
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#if BUILDFLAG(USE_PROPRIETARY_CODECS)
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supported_codecs |= media::EME_CODEC_MP4_AAC;
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#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
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for (size_t i = 0; i < codecs.size(); ++i) {
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if (codecs[i] == kCdmSupportedCodecVp8)
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supported_codecs |= media::EME_CODEC_WEBM_VP8;
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if (codecs[i] == kCdmSupportedCodecVp9) {
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supported_codecs |= media::EME_CODEC_WEBM_VP9;
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supported_codecs |= media::EME_CODEC_COMMON_VP9;
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}
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#if BUILDFLAG(USE_PROPRIETARY_CODECS)
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if (codecs[i] == kCdmSupportedCodecAvc1)
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supported_codecs |= media::EME_CODEC_MP4_AVC1;
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#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
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}
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using Robustness = cdm::WidevineKeySystemProperties::Robustness;
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concrete_key_systems->emplace_back(new cdm::WidevineKeySystemProperties(
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supported_codecs,
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#if defined(OS_CHROMEOS)
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media::EmeRobustness::HW_SECURE_ALL, // Maximum audio robustness.
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media::EmeRobustness::HW_SECURE_ALL, // Maximim video robustness.
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media::EmeSessionTypeSupport::
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SUPPORTED_WITH_IDENTIFIER, // Persistent-license.
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media::EmeSessionTypeSupport::
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NOT_SUPPORTED, // Persistent-release-message.
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media::EmeFeatureSupport::REQUESTABLE, // Persistent state.
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media::EmeFeatureSupport::REQUESTABLE)); // Distinctive identifier.
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#else // (Desktop)
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Robustness::SW_SECURE_CRYPTO, // Maximum audio robustness.
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Robustness::SW_SECURE_DECODE, // Maximum video robustness.
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media::EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-license.
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media::EmeSessionTypeSupport::
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NOT_SUPPORTED, // persistent-release-message.
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media::EmeFeatureSupport::REQUESTABLE, // Persistent state.
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media::EmeFeatureSupport::NOT_SUPPORTED)); // Distinctive identifier.
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#endif // defined(OS_CHROMEOS)
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}
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#endif // defined(WIDEVINE_CDM_AVAILABLE)
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#endif // BUILDFLAG(ENABLE_PEPPER_CDMS)
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void AddChromeKeySystems(
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std::vector<std::unique_ptr<KeySystemProperties>>* key_systems_properties) {
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#if BUILDFLAG(ENABLE_PEPPER_CDMS)
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AddExternalClearKey(key_systems_properties);
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#if defined(WIDEVINE_CDM_AVAILABLE)
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AddPepperBasedWidevine(key_systems_properties);
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#endif // defined(WIDEVINE_CDM_AVAILABLE)
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#endif // BUILDFLAG(ENABLE_PEPPER_CDMS)
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}
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