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#!/bin/bash
set -e
function help {
cat <<EOF
TokSSH: Make an SSH connection over Tox.
Use this simple wrapper like you would use "ssh".
Usage:
tokssh [ssh options] [user@]<address>
Usage:
TUNTOX_DESTINATION=[user@]<address> tokssh
where
ssh options: options to pass to ssh process
user: login username on remote host (you could also use "-l user")
address: a ToxID
To specify a tuntox secret (password), set the environment variable
TUNTOX_SECRET.
Specifying passwords on the command line is insecure, since the arguments of
programs are considered public data.
For that reason, you can also specify the remote address and username with
the environment variable TUNTOX_DESTINATION. This hides your desintation
from other users on the system. In this case, all options will be passed to
SSH.
examples:
TUNTOX_SECRET=sOmEPassWOrd tokssh 5A40C3443ABD6E1DDEE682E83F84A4D556C24C22D2230DCC141A4723C123473C171A4D9C4054
tokssh user@5A40C3443ABD6E1DDEE682E83F84A4D556C24C22D2230DCC141A4723C123473C171A4D9C4054
tokssh 5A40C3443ABD6E1DDEE682E83F84A4D556C24C22D2230DCC141A4723C123473C171A4D9C4054
tokssh -p 2222 -o ForwardAgent=yes -l user 5A40C3443ABD6E1DDEE682E83F84A4D556C24C22D2230DCC141A4723C123473C171A4D9C4054
TUNTOX_DESTINATION=5A40C3443ABD6E1DDEE682E83F84A4D556C24C22D2230DCC141A4723C123473C171A4D9C4054 tokssh -p 2222
files:
~/.tuntox/persist/
If directory exists, then read & store a persistent secret key/TOXID within.
EOF
}
if [ "$TUNTOX_DESTINATION" ]
then
set -- "$@" "$TUNTOX_DESTINATION"
unset TUNTOX_DESTINATION
fi
ssh_options=()
while [ $# -gt 0 ]
do
case "$1" in
-h|--help)
help
exit ;;
*)
if [ $# -eq 1 ]
then
break
else
ssh_options += "$1"
fi ;;
esac
shift
done
[ $# = 1 ] || { help; exit 1; }
if [ -d ~/.tuntox/persist ]; then
persist='-C ~/.tuntox/persist'
else
persist=
fi
# Explicitly set the default values for CanonicalizeHostname and UpdateHostKeys,
# just to be safe.
# We use StrictHostKeyChecking=accept because Tox validates the Tox identity and
# the Tox key is the identity. We have already performed initial public key
# exchange.
ssh \
-o ProxyCommand="tuntox $persist -i %h -W localhost:%p '$TUNTOX_SECRET'" \
-o StrictHostKeyChecking=accept-new \
-o CanonicalizeHostname=no \
-o UpdateHostKeys=yes \
"${ssh_options[@]}" \
-- \
"$1"
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