08c57e7a8e
Merge from Widevine repo of http://go/wvgerrit/48842 In order to work around a limitation of some versions of OEMCrypto, the packager is going to start generating files with multiple Widevine PSSH boxes. For backwards-compatibility, the first PSSH will be a SINGLE-type PSSH while the ENTITLED_KEYS-type PSSH (if any) will come later. In order to use entitlement licenses, then, the CDM needs to change how it selects PSSHs from the init data blob. Previously, the CDM always took the first Widevine PSSH it found. Now, it must find all the Widevine PSSHs and select the appropriate PSSH for the OEMCrypto implementation. ENTITLTED_KEYS will be used on OEC v14 and later, if available, while SINGLE will be preferred on earlier OEMCrypto versions. As a side-effect of this, the CDM is now stricter about what PSSH payloads it will accept. Previously, it would blindly accept the payload of any PSSH where the wrapper was not malformed. Now, it sometimes has to actually parse the payload, and therefore PSSHs that have corrupted payloads will be rejected. This affected a few unit tests which used PSSHs that were malformed. These tests have been updated to use PSSHs that do not fail to parse. Bug: 78142219 Test: CE CDM Unit Tests Test: Android Unit Tests Test: Android Google Play & Netflix Test: tested as part of http://go/ag/4674759 Change-Id: Ia70d627a914299bfbae84b4cb46f100dc5c7a501
97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine Master
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// License Agreement.
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#ifndef CORE_INCLUDE_INITIALIZATION_DATA_H_
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#define CORE_INCLUDE_INITIALIZATION_DATA_H_
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#include <string>
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#include "license_protocol.pb.h"
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#include "wv_cdm_types.h"
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namespace wvcdm {
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class WvCdmEngineTest;
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class InitializationData {
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public:
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InitializationData(const std::string& type = std::string(),
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const CdmInitData& data = CdmInitData(),
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const std::string& oec_version = std::string());
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bool is_supported() const { return is_cenc_ || is_webm_ || is_hls_; }
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bool is_cenc() const { return is_cenc_; }
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bool is_hls() const { return is_hls_; }
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bool is_webm() const { return is_webm_; }
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bool IsEmpty() const { return data_.empty(); }
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const std::string& type() const { return type_; }
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const CdmInitData& data() const { return data_; }
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std::vector<uint8_t> hls_iv() const { return hls_iv_; }
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CdmHlsMethod hls_method() const { return hls_method_; }
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// TODO(jfore): Perhaps this should be a generic structure with the ids for
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// any type of licensing?
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std::vector<video_widevine::SubLicense> ExtractSublicenseKeys() const;
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std::vector<video_widevine::WrappedKey> ExtractWrappedKeys() const;
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private:
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bool SelectWidevinePssh(const CdmInitData& init_data,
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bool prefer_entitlements,
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CdmInitData* output);
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// Helpers used by SelectWidevinePssh().
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bool ExtractWidevinePsshs(const CdmInitData& init_data,
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std::vector<CdmInitData>* psshs);
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bool ExtractWidevinePsshData(const uint8_t* data,
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size_t length,
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CdmInitData* output);
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bool ExtractHlsAttributes(const std::string& attribute_list,
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CdmHlsMethod* method, std::vector<uint8_t>* iv,
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std::string* uri);
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static bool ConstructWidevineInitData(CdmHlsMethod method,
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const std::string& uri,
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CdmInitData* output);
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static bool ExtractQuotedAttribute(const std::string& attribute_list,
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const std::string& key,
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std::string* value);
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static bool ExtractHexAttribute(const std::string& attribute_list,
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const std::string& key,
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std::vector<uint8_t>* value);
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static bool ExtractAttribute(const std::string& attribute_list,
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const std::string& key, std::string* value);
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static std::vector<std::string> ExtractKeyFormatVersions(
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const std::string& key_format_versions);
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static bool DetectEntitlementPreference(
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const std::string& oec_version_string);
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// For testing only:
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#if defined(UNIT_TEST)
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FRIEND_TEST(HlsAttributeExtractionTest, ExtractAttribute);
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FRIEND_TEST(HlsConstructionTest, InitData);
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FRIEND_TEST(HlsInitDataConstructionTest, InvalidUriDataFormat);
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FRIEND_TEST(HlsInitDataConstructionTest, InvalidUriBase64Encode);
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FRIEND_TEST(HlsHexAttributeExtractionTest, ExtractHexAttribute);
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FRIEND_TEST(HlsKeyFormatVersionsExtractionTest, ExtractKeyFormatVersions);
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FRIEND_TEST(HlsParseTest, Parse);
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FRIEND_TEST(HlsQuotedAttributeExtractionTest, ExtractQuotedAttribute);
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FRIEND_TEST(HlsTest, ExtractHlsAttributes);
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#endif
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std::string type_;
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CdmInitData data_;
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bool is_cenc_;
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bool is_hls_;
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bool is_webm_;
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std::vector<uint8_t> hls_iv_;
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CdmHlsMethod hls_method_;
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};
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} // namespace wvcdm
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#endif // CORE_INCLUDE_INITIALIZATION_DATA_H_
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