Adding support of SSHKEYLOGFILE #566
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When SSHKEYLOGFILE is set, shared secrets used in key exchange (e.g., during initial or rekey events) are logged alongside the KEXINIT cookie. This supports offline decryption tools like Wireshark for debugging and protocol analysis. WARNING: Do not enable in production environments. This exposes session secrets.
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Log SSH shared secret for external protocol analysis via SSHKEYLOGFILE
When SSHKEYLOGFILE is set, shared secrets used in key exchange (e.g., during
initial or rekey events) are logged alongside the KEXINIT cookie. This supports
offline decryption tools like Wireshark / Tshark for debugging and protocol analysis.
See README.keylog for details
WARNING: This exposes session secrets on client side.