Launchpad hangs if presented an 'ed25519' key

Bug #1740899 reported by Walex B
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Launchpad itself
New
Undecided
Unassigned

Bug Description

When connecting 'bzr' by SSH to Launchpad, the SSH responder on the Launchpad side hangs silently if it is given an 'ed255key'.

Until the relevant key types are supported (bugs #907675 #1282220) there should be a warning at key registration time to make sure SSH does not offer them.
Something like this is needed in the SSH config to work around:

Host _lp
  HostName git.launchpad.net
  HostName ppa.launchpad.net
  HostName bazaar.launchpad.net
  HostName upload.launchpad.net
  Port 22
  IdentitiesOnly yes
  IdentityFile ~/.ssh/id_rsa_key

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