36 lines
1.3 KiB
Bash
36 lines
1.3 KiB
Bash
#!/usr/bin/env bash
|
|
|
|
set -euo pipefail
|
|
|
|
WGET() {
|
|
wget --retry-connrefused -t 15 --waitretry=10 --header='Metadata-Flavor: Google' "$@"
|
|
}
|
|
|
|
# When dealing with cryptographic keys, we want to keep things private.
|
|
umask 077
|
|
mkdir -p /root/.ssh
|
|
|
|
echo "Fetching authorized keys..."
|
|
WGET -O /tmp/auth_keys http://metadata.google.internal/computeMetadata/v1/instance/attributes/sshKeys
|
|
|
|
# Read keys one by one, split in case Google decided
|
|
# to append metadata (it does sometimes) and add to
|
|
# authorized_keys if not already present.
|
|
touch /root/.ssh/authorized_keys
|
|
while IFS='' read -r line || [[ -n "$line" ]]; do
|
|
keyLine=$(echo -n "$line" | cut -d ':' -f2)
|
|
IFS=' ' read -r -a array <<<"$keyLine"
|
|
if [[ ${#array[@]} -ge 3 ]]; then
|
|
echo "${array[@]:0:3}" >>/tmp/new_keys
|
|
echo "Added ${array[*]:2} to authorized_keys"
|
|
fi
|
|
done </tmp/auth_keys
|
|
mv /tmp/new_keys /root/.ssh/authorized_keys
|
|
chmod 600 /root/.ssh/authorized_keys
|
|
|
|
echo "Fetching host keys..."
|
|
WGET -O /tmp/ssh_host_ed25519_key http://metadata.google.internal/computeMetadata/v1/instance/attributes/ssh_host_ed25519_key
|
|
WGET -O /tmp/ssh_host_ed25519_key.pub http://metadata.google.internal/computeMetadata/v1/instance/attributes/ssh_host_ed25519_key_pub
|
|
mv -f /tmp/ssh_host_ed25519_key* /etc/ssh/
|
|
chmod 600 /etc/ssh/ssh_host_ed25519_key
|
|
chmod 644 /etc/ssh/ssh_host_ed25519_key.pub
|