135 lines
3.1 KiB
Bash
135 lines
3.1 KiB
Bash
#!/bin/sh
|
|
#
|
|
# Script to add/update an VPN user for both IPsec/L2TP and Cisco IPsec
|
|
#
|
|
# Copyright (C) 2018-2021 Lin Song <linsongui@gmail.com>
|
|
#
|
|
# This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
|
|
# Unported License: http://creativecommons.org/licenses/by-sa/3.0/
|
|
#
|
|
# Attribution required: please include my name in any derivative and let me
|
|
# know how you have improved it!
|
|
|
|
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
|
|
SYS_DT=$(date +%F-%T | tr ':' '_')
|
|
|
|
exiterr() { echo "Error: $1" >&2; exit 1; }
|
|
conf_bk() { /bin/cp -f "$1" "$1.old-$SYS_DT" 2>/dev/null; }
|
|
|
|
add_vpn_user() {
|
|
|
|
if [ "$(id -u)" != 0 ]; then
|
|
exiterr "Script must be run as root. Try 'sudo sh $0'"
|
|
fi
|
|
|
|
if [ ! -f "/etc/ppp/chap-secrets" ] || [ ! -f "/etc/ipsec.d/passwd" ]; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: File /etc/ppp/chap-secrets and/or /etc/ipsec.d/passwd do not exist!
|
|
Your must first set up the VPN server before adding VPN users.
|
|
See: https://github.com/hwdsl2/setup-ipsec-vpn
|
|
EOF
|
|
exit 1
|
|
fi
|
|
|
|
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: This script can only be used with VPN servers created using:
|
|
https://github.com/hwdsl2/setup-ipsec-vpn
|
|
EOF
|
|
exit 1
|
|
fi
|
|
|
|
VPN_USER=$1
|
|
VPN_PASSWORD=$2
|
|
|
|
if [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
|
|
cat 1>&2 <<EOF
|
|
Usage: sudo sh $0 'username_to_add' 'password_to_add'
|
|
EOF
|
|
exit 1
|
|
fi
|
|
|
|
if printf '%s' "$VPN_USER $VPN_PASSWORD" | LC_ALL=C grep -q '[^ -~]\+'; then
|
|
exiterr "VPN credentials must not contain non-ASCII characters."
|
|
fi
|
|
|
|
case "$VPN_USER $VPN_PASSWORD" in
|
|
*[\\\"\']*)
|
|
exiterr "VPN credentials must not contain these special characters: \\ \" '"
|
|
;;
|
|
esac
|
|
|
|
clear
|
|
|
|
cat <<EOF
|
|
|
|
Welcome! This script will add or update an VPN user account
|
|
for both IPsec/L2TP and IPsec/XAuth (Cisco IPsec).
|
|
|
|
If the username you specified matches an existing VPN user,
|
|
that user will be updated with the new password.
|
|
|
|
Please double check before continuing!
|
|
|
|
================================================
|
|
|
|
VPN user to add or update:
|
|
|
|
Username: $VPN_USER
|
|
Password: $VPN_PASSWORD
|
|
|
|
Write these down. You'll need them to connect!
|
|
|
|
================================================
|
|
|
|
EOF
|
|
|
|
printf "Do you want to continue? [y/N] "
|
|
read -r response
|
|
case $response in
|
|
[yY][eE][sS]|[yY])
|
|
echo
|
|
echo "Adding or updating VPN user..."
|
|
echo
|
|
;;
|
|
*)
|
|
echo "Abort. No changes were made."
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
# Backup config files
|
|
conf_bk "/etc/ppp/chap-secrets"
|
|
conf_bk "/etc/ipsec.d/passwd"
|
|
|
|
# Add or update VPN user
|
|
sed -i "/^\"$VPN_USER\" /d" /etc/ppp/chap-secrets
|
|
cat >> /etc/ppp/chap-secrets <<EOF
|
|
"$VPN_USER" l2tpd "$VPN_PASSWORD" *
|
|
EOF
|
|
|
|
# shellcheck disable=SC2016
|
|
sed -i '/^'"$VPN_USER"':\$1\$/d' /etc/ipsec.d/passwd
|
|
VPN_PASSWORD_ENC=$(openssl passwd -1 "$VPN_PASSWORD")
|
|
cat >> /etc/ipsec.d/passwd <<EOF
|
|
$VPN_USER:$VPN_PASSWORD_ENC:xauth-psk
|
|
EOF
|
|
|
|
# Update file attributes
|
|
chmod 600 /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
|
|
|
cat <<'EOF'
|
|
Done!
|
|
|
|
NOTE: All VPN users will share the same IPsec PSK.
|
|
If you forgot the PSK, check /etc/ipsec.secrets.
|
|
|
|
EOF
|
|
|
|
}
|
|
|
|
## Defer until we have the complete script
|
|
add_vpn_user "$@"
|
|
|
|
exit 0
|