71 lines
2.9 KiB
Markdown
71 lines
2.9 KiB
Markdown
# Widevine CE CDM 19.4.0
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Released 2024-11-27
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## Getting Started
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This project contains the sources for building a Widevine CDM module. Read the
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following to learn more about the contents of this project and how to use them:
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The [Widevine Developer Site][wv-devsite] documents the CDM API and describes
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how to integrate the CDM into a system.
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## New in v19.4.0
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This is a minor release with bug fixes and test improvements.
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### Features
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- Add support for new OEMCrypto_GetBCCSignatureType() API. This API is optional
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and only used on devices that support Provisioning 4 with a Phase 3 DICE
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chain.
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- Add credential types to client identification protobuf
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- Return BCC signature type into client identification protobuf
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- BCC extraction tool updates and refactoring
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- Rewrite BCC, DeviceInfo and CSR Payload validators to cover info parsing,
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validating and updating unit tests
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- Update error codes returned by cbor/provisioning 4.0 validators to be less
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severe when possible
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- Add a few required fields for test-generated BCC
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- Include licensing files with this release and future CE CDM releases
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### Tests
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- Update license release tests to accomodate differences in behavior for CE
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CDM and Android
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- Update some CAST tests to enforce format of the message signed by
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OEMCrypto_GenerateRSASignature()
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- Add tool to extract BCC and build info for BCC uploading test
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- Skip usage table tests on devices that don't support usage tables
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- Fix key type used in InstallOemPrivateKeyCanBeUsed test
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- Re-enable OEMCrypto security tests
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- Allow multiple callbacks in TestSleep class to prevent multiple classes
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trying to register a callback
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- Improve error logging for tests
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- Add log statement on failure when device with a TEST_ONLY system ID cannot
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play production content
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### Bug Fixes
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- Fix HLS parsing of bad content IDs
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- Revert change to limit output buffer size during decrypt fallback due to
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failures seen in 19.3 because the output buffer was not big enough
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- Update blank OEMCrypto devsite test pages
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- Small fixes to reduce compiler warnings
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[CHANGELOG.md](./CHANGELOG.md) lists the major changes for each past release.
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## Contains No OEMCrypto
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The CE CDM requires an implementation of OEMCrypto, our hardware abstraction
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layer, in order to compile and run successfully. If you are an OEMCrypto
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implementer, you should have access to the
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[OEMCrypto partner repository][oec-repo], which contains additional source code
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and information about implementing OEMCrypto, including the Widevine-written
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OEMCrypto implementation, the OEMCrypto Porting Kit. (OPK) If you are not an
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OEMCrypto implementer, then you will need to get an OEMCrypto implementation
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from your SoC manufacturer before you can use the CE CDM.
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[wv-devsite]: https://developers.google.com/widevine/drm/client/ce-cdm
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[oec-repo]: https://widevine-partner.googlesource.com/oemcrypto/
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