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2005 Jun 16
1
Bug report: first_kex_packet_follows behaviour seems wrong
...the algorithm negotiation of the transport layer has a bug,
it does not follow the specification of draft-ietf-secsh-transport-24, page
19, where the behaviour of first_kex_packet_follows is specified.
I've got an ssh client that sends an SSH_MSG_KEXINIT message and specifies
only 'diffie-hellman-group1-sha1' as key exchange algorithm. It sets
first_kex_packet_follows to true, and immediately sends the
SSH_MSG_KEXDH_INIT message. The ssh server (openssh-3.9p1) specifies three
key exchange algorithms in its SSH_MSG_KEXINIT message:
'diffie-hellman-group-exchange-sha1,diffie-hellman...
2018 Dec 16
5
ssh_dh?
Don't know if this was corrected in 2.3.4 (haven't upgraded yet but
didn't see it in the notes) - but in 2.3.3 I see this in my log:
imap-login: Error: Diffie-Hellman key exchange requested, but no DH
parameters provided. Set ssh_dh=</path/to/dh.pem
So...either there's an undocumented feature of SSH-over-IMAP (that's
Dovecot - always on the cutting edge!) or someone had a coffee shortage
during a coding session...
--
Daniel