Christian Gick c61bcffec2 revert(e2ee): restore KDF_HKDF=1, KDF_RAW=0 causes PBKDF2 double-derivation (MAT-144) ...

KDF_PBKDF2=0 does NOT mean raw mode — libwebrtc applies its built-in
PBKDF2 on top of pre-derived keys, causing DEC_FAILED for audio too.
Revert to KDF_HKDF=1 (Rust applies HKDF, we pass raw base keys).

Keep diagnostic improvements:
- _derive_and_set_key() wrapper with logging
- Per-track type logging (audio vs video) in on_track_subscribed
- Frame size check in look_at_screen (detect E2EE failure)

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

2026-03-10 08:17:46 +02:00

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