Christian Gick 4f8bfbe479 fix(voice): pre-derive HKDF in Python, use KDF_NONE to bypass Rust FFI HKDF ...

Rust FFI's KDF_HKDF path for incoming decryption may use wrong parameters.
Pre-derive HKDF(base_key, salt="LKFrameEncryptionKey", info=identity) in Python
and pass derived key with KDF_NONE so Rust FFI uses it directly as frame key.

Matches EC's MatrixKeyProvider: ratchetWindowSize=10, keyringSize=256.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-02-22 08:47:41 +02:00

19 KiB

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