How to use openssh-client in Cyberark environments with autocompletion and multiple servers?

Question

I usually have what I need in my ~/.ssh/ folder (a config file and more) to connect to servers with ssh <tab><tab>. In an environment with Cyberark the configuration seems to be a bit more intricate due to the three @ signs

I found this answer, but I struggled to find a way to enjoy autocompletion for many hosts because the User field does not support tokens like %h for host, so I'd have to create the same entry again for every server where I previously just added servers to the Host line. Is there a way this can be achieved?

Answer 1

After spending some time I came up with the following solution which is more like a workaround. I'm not really proud of it, but it gets the job done with the least amount of new code or difficult to understand code.

Create a wrapper script like this:

$  cat ~/bin/ssh-wrapper.sh
#!/bin/bash
# https://docs.cyberark.com/Product-Doc/OnlineHelp/PAS/latest/en/Content/PASIMP/PSSO-PMSP.htm#The
# Replace where appropriate:
# $1 = Server FQDN
# prefix = your administrative user may be different from you normal user
# internal.example.org = domain server (controller)
# pam.example.org = Cyberark jump host

ssh -t ${USERNAME,,}@prefix${USERNAME,,}#internal.example.org@[email protected]

Add the following to your bash startup file. Yours may be different than mine, because I'm hacking here in a customer environment with Tortoise Git-Bash. (Which works nice by the way when you use it with Flux Terminal, k9s and jq.)

1. Create an alias for you wrapper script, I chose sshw here.
2. Create variable with all the FQDNs of the servers you want to have in your autocompletion, or create file which contains these FQDNs and read it to a variable.
3. Create a bash completion expression which applies this to your sshw alias.

$  cat ~/.bash_profile
alias sshw="$HOME/bin/ssh-wrapper.sh"
SSH_COMPLETE=$(cat "$HOME/.ssh/known_hosts_wrapper")
complete -o default -W "${SSH_COMPLETE[*]}" sshw

Now you can tab you way to servers.