0403a340c4
Attempted fixes: 1. Add \r\n to version strings (reverted - incorrect) 2. Add SSH_MSG_KEXINIT byte to KEXINIT payloads (reverted - payloads already contain it) Current issue: - OpenSSH client still rejects SSH_MSG_KEX_ECDH_REPLY - Client not sending NEWKEYS - Exchange hash calculation still has subtle differences Deep analysis completed: - Analyzed 10 OpenSSH source functions - Verified mpint encoding, key derivation, MAC calculation all correct - Still need to find remaining exchange hash component differences