128 lines
3.4 KiB
Bash
Executable File
128 lines
3.4 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Script to delete a VPN user for both IPsec/L2TP and Cisco IPsec
|
|
#
|
|
# Copyright (C) 2018-2024 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; }
|
|
|
|
show_intro() {
|
|
cat <<'EOF'
|
|
|
|
Welcome! Use this script to delete a VPN user account for both
|
|
IPsec/L2TP and IPsec/XAuth ("Cisco IPsec") modes.
|
|
EOF
|
|
}
|
|
|
|
del_vpn_user() {
|
|
if [ "$(id -u)" != 0 ]; then
|
|
exiterr "Script must be run as root. Try 'sudo bash $0'"
|
|
fi
|
|
if ! grep -qs "hwdsl2 VPN script" /etc/sysctl.conf \
|
|
|| [ ! -f /etc/ppp/chap-secrets ] || [ ! -f /etc/ipsec.d/passwd ]; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: Your must first set up the IPsec VPN server before deleting VPN users.
|
|
See: https://github.com/hwdsl2/setup-ipsec-vpn
|
|
EOF
|
|
exit 1
|
|
fi
|
|
if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
|
|
cat 1>&2 <<EOF
|
|
Usage: sudo bash $0 'username_to_delete'
|
|
You may also run this script interactively without arguments.
|
|
EOF
|
|
exit 1
|
|
fi
|
|
VPN_USER=$1
|
|
if [ -z "$VPN_USER" ]; then
|
|
show_intro
|
|
echo
|
|
echo "List of existing VPN usernames:"
|
|
cut -f1 -d : /etc/ipsec.d/passwd | LC_ALL=C sort
|
|
echo
|
|
echo "Enter the VPN username you want to delete."
|
|
read -rp "Username: " VPN_USER
|
|
if [ -z "$VPN_USER" ]; then
|
|
echo "Abort. No changes were made." >&2
|
|
exit 1
|
|
fi
|
|
fi
|
|
if printf '%s' "$VPN_USER" | LC_ALL=C grep -q '[^ -~]\+'; then
|
|
exiterr "VPN username must not contain non-ASCII characters."
|
|
fi
|
|
case "$VPN_USER" in
|
|
*[\\\"\']*)
|
|
exiterr "VPN username must not contain these special characters: \\ \" '"
|
|
;;
|
|
esac
|
|
if [ "$(grep -c "^\"$VPN_USER\" " /etc/ppp/chap-secrets)" = 0 ] \
|
|
|| [ "$(grep -c "^$VPN_USER:\\\$1\\\$" /etc/ipsec.d/passwd)" = 0 ]; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: The specified VPN user does not exist in /etc/ppp/chap-secrets
|
|
and/or /etc/ipsec.d/passwd.
|
|
EOF
|
|
exit 1
|
|
fi
|
|
if [ "$(grep -c -v -e '^#' -e '^[[:space:]]*$' /etc/ppp/chap-secrets)" = 1 ] \
|
|
|| [ "$(grep -c -v -e '^#' -e '^[[:space:]]*$' /etc/ipsec.d/passwd)" = 1 ]; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: Could not delete the only VPN user from /etc/ppp/chap-secrets
|
|
and/or /etc/ipsec.d/passwd.
|
|
EOF
|
|
exit 1
|
|
fi
|
|
[ -n "$1" ] && show_intro
|
|
cat <<EOF
|
|
|
|
================================================
|
|
|
|
VPN user to delete:
|
|
|
|
Username: $VPN_USER
|
|
|
|
================================================
|
|
|
|
EOF
|
|
printf "Do you want to continue? [Y/n] "
|
|
read -r response
|
|
case $response in
|
|
[yY][eE][sS]|[yY]|'')
|
|
echo
|
|
echo "Deleting VPN user..."
|
|
echo
|
|
;;
|
|
*)
|
|
echo "Abort. No changes were made."
|
|
exit 1
|
|
;;
|
|
esac
|
|
# Backup config files
|
|
conf_bk "/etc/ppp/chap-secrets"
|
|
conf_bk "/etc/ipsec.d/passwd"
|
|
# Delete VPN user
|
|
sed -i "/^\"$VPN_USER\" /d" /etc/ppp/chap-secrets
|
|
# shellcheck disable=SC2016
|
|
sed -i '/^'"$VPN_USER"':\$1\$/d' /etc/ipsec.d/passwd
|
|
# Update file attributes
|
|
chmod 600 /etc/ppp/chap-secrets* /etc/ipsec.d/passwd*
|
|
cat <<'EOF'
|
|
Done!
|
|
|
|
EOF
|
|
}
|
|
|
|
## Defer until we have the complete script
|
|
del_vpn_user "$@"
|
|
|
|
exit 0
|