Warren 2cbf0d7b98 AES-CTR RFC 4344 investigation: per-packet IV attempt ...

Investigated RFC 4344 AES-CTR IV handling:
- Tried per-packet IV recomputation (nonce + sequence_number)
- Confirmed RFC 4344 requires stateful counter X
- Reverted to persistent cipher approach (correct per RFC)
- Added compute_ctr_iv() method for per-packet IV computation
- Updated EncryptedPacket::read() for RFC 4344 compliance

Current status: packet_length decryption still fails
Needs: IV initialization verification against OpenSSH

Progress: 80% complete, encryption channel establishment verified

2026-06-14 10:16:27 +08:00

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