Add many ssh keys to proxmox containers

README.md

This shell script allows you to add public keys to specified containers

How to use:

1. Download the script and make a folder called keys
2. add all your keys to your newly created key folder
3. add the servers to line 27's array [container id]="username" ex: servers+=( [235]="root" [421]="root" [123]="root" [124]="root" [321]="noroot" )
4. Thats it! If your keys are correct and you had ssh enabled, it should work :D

add_keys.sh

#!/bin/bash

# add_keys.sh - add public keys to many proxmox containers 
# Copyright (C) 2022 Nadie (August S.)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
set -e

if ! [ $(id -u) = 0 ]; then
   echo "Please run script as root"
   exit 1
fi


declare -A servers
servers+=( )

tmpfile=$(mktemp /tmp/copykeys.XXXXXX)

for keyfile in keys/*; do
	echo "# keyfile: $keyfile" >> "$tmpfile"
	echo "$(cat "$keyfile")" >> "$tmpfile"
	echo -e "\n" >> "$tmpfile"
done

echo "Keys to add:"
cat "$tmpfile"


for key in ${!servers[@]}; do
    UENV=""
    HOMEDIR=""
    echo "Processing ${servers[${key}]}@$key"
    UENV=$(pct exec "$key" getent passwd "${servers[${key}]}")
    HOMEDIR=$(echo ${UENV} | cut -f6 -d:)
	echo "${servers[${key}]}:${servers[${key}]} | $HOMEDIR"
	pct exec $key -- mkdir -p "$HOMEDIR/.ssh"
	pct push "$key" "$tmpfile" "$HOMEDIR/.ssh/authorized_keys"
	pct exec $key -- chmod 700 "$HOMEDIR/.ssh"
	pct exec $key -- chmod 600 "$HOMEDIR/.ssh/authorized_keys"
	pct exec $key -- chown -R "${servers[${key}]}":"${servers[${key}]}" "$HOMEDIR/.ssh"
	echo "Added keys to ct $key"
done



rm "$tmpfile"