tomaswolf commented on issue #525:
URL: https://github.com/apache/mina-sshd/issues/525#issuecomment-2222550618

   As far as I see all checks for Bouncy Castle and that eddsa library being 
available are done.
   
   There is nothing to do in that respect.
   
   _However:_
   
   There is indeed a bug in our implementation of sntrup761x25519-sha512 that 
causes the key exchange to fail with probability 1/256 with an `SshException` 
"KeyExchange signature verification failed for key type=...". So most of the 
time it works, but sometimes it'll fail.
   
   Work-around: don't use sntrup761x25519-sha512. Explicitly set the DH 
factories you want on the SshClient, and do _not_ include 
sntrup761x25519-sha512 in that list.
   
   This bug will be fixed in the next release.
   


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