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120 lines
6.1 KiB
Markdown
120 lines
6.1 KiB
Markdown
# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [1.2.0] - 2022-07-30
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### Added
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- The CLI command `migrate` can now accept a folder path to batch migrate WVD files.
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- The Cdm now uses custom exceptions where the use case is justified. All custom exceptions are under a parent custom
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exception to allow catching of any Pywidevine exception.
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### Changed
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- The Cdm has been reworked as a session-based Cdm. You now initialize the Cdm with just the device you wish to use,
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and now you open sessions with `Cdm.open()` to get a session ID. For usage example see `license` CLI command in
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`main.py`.
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- For the above change, `serve` CLI command interface has changed and now uses a `/open/{device}` endpoint to start
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a Cdm session. The client will need to first use /open to get a Session ID, then pass the Session ID through to both
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/challenge and /keys now.
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- The Cdm no longer requires you to specify `raw` bool parameter. It now supports arbitrary and valid Widevine Cenc
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Header Data without needing to explicitly specify which it is.
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- The Cdm `pssh` param has been renamed as `init_data`. Doc-strings have been changed to prioritize explanation of it
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referring to Widevine Cenc Header rather than PSSH Boxes. This is to show that the Cdm more-so wants Init Data than
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a PSSH box. The full PSSH is never kept nor ever used, only it's init data is. It still supports PSSH box data.
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- Cdm `set_service_certificate()` now returns the provider ID string rather than the underlying (and now verified)
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DrmCertificate. This is because the DrmCertificate is not likely useful and would still be possible to obtain in full
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but quick access to the Provider ID may be more useful.
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- License responses can now be only be parsed once by `Cdm.parse_license()`. Any further attempts will raise an
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InvalidContext exception. This is because context data is now cleared for it's respective License Request once it's
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parsed to reduce data lingering in memory.
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- Trove Classifier for Development Status is now 5 (Production/Stable).
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### Removed
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- You can no longer provide a direct `DrmCertificate` to `Cdm.set_service_certificate()` for security reasons.
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You must provide either a `SignedDrmCertificate` or a `SignedMessage` containing a `SignedDrmCertificate`.
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- PSSH `from_init_data()` has been removed. It was unused and is unnecessary with improvements to `get_as_box()`.
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### Fixed
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- Cdm `set_service_certificate()` now verifies the signature of the provided Certificate. This patches a trivial
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exploit/workaround that allows an attacker to recover the plaintext Client ID from an encrypted Client ID.
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- Cdm `parse_license()` now verifies the input message type as a `LICENSE` message.
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- Cdm `parse_license()` now clears context for the License Request once it's License Response message has been parsed.
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This reduces data lingering in the `context` dictionary when it may only be needed once.
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- The Context Availability error handler in Cdm `parse_license()` has been fixed.
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- Typing of `type_` param of `Cdm.get_license_challenge()` has been fixed.
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## [1.1.1] - 2022-07-22
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### Fixed
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- The --vmp argument of the create-device command is now optional.
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## [1.1.0] - 2022-07-21
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### Added
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- Added support for setting a Service Certificate in SignedDrmCertificate form as well as raw DrmCertificate form.
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However, It's unlikely for the service to provide the certificate in raw DrmCertificate form without a signature.
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- Added a CLI command `create-device` to create Widevine Device (`.wvd`) files from RSA PEM/DER Private Keys and
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Client ID blobs. You can also provide VMP (FileHashes) data which will be merged into the Client ID blob.
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- Added a CLI command `migrate` that uses `Device.migrate()` and `dump()` to migrate older v1 Widevine Device files
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to v2.
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- Added the v1 Structure of Widevine Devices for migration use.
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- Added `Device.migrate()` class method that effectively loads older format WVD data. You can then use `dumps()` to
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get back the WVD data in the latest supported format.
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- Added ability to use Privacy mode on the test command.
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### Changed
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- Set Service Certificates are now stored as the raw underlying DrmCertificate as the signature data is unused by
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the CDM.
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- Moved all Widevine Device structures under a Structures class.
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- I removed the `send_key_control_nonce` flag from all Structures even though it was technically used.
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This is because the flag was never used as of this project, and I do not want to take up the flag slot.
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### Fixed
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- Devices `dump()` function now uses the correct `type_` parameter when building the struct.
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- Fixed release date year of v1.0.0 and v1.0.1 in the changelog.
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## [1.0.1] - 2022-07-21
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### Added
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- More information to the PyPI meta information, e.g., classifiers, readme, some URLs.
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### Changed
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- Moved the License Type parameter from the Cdm constructor to `get_license_challenge()`.
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- The Session ID is no longer used as the Request ID which could help with blocks or replay checks due
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to it being the same Session ID for each request. It's now a random 16 byte value each time.
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- Only the Context Data of each license request is now stored instead of the full message.
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### Removed
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- Removed unnecessary and unused `raw` Cdm class instance variable.
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### Fixed
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- CDMs `set_service_certificate()` now correctly raises a DecodeError on Decode Error instead of a ValueError.
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- Context Data will now always match to their corresponding License Responses. This fixes an issue where creating
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a second challenge would overwrite the context data of the first challenge. Parsing the first challenge after
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would result in either a key decrypt error, or garbage key data.
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## [1.0.0] - 2022-07-20
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Initial Release.
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[1.2.0]: https://github.com/rlaphoenix/pywidevine/releases/tag/v1.2.0
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[1.1.1]: https://github.com/rlaphoenix/pywidevine/releases/tag/v1.1.1
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[1.1.0]: https://github.com/rlaphoenix/pywidevine/releases/tag/v1.1.0
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[1.0.1]: https://github.com/rlaphoenix/pywidevine/releases/tag/v1.0.1
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[1.0.0]: https://github.com/rlaphoenix/pywidevine/releases/tag/v1.0.0
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