294 lines
8.7 KiB
Bash
Executable File
294 lines
8.7 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Script to update Libreswan on Amazon Linux 2
|
|
#
|
|
# The latest version of this script is available at:
|
|
# https://github.com/hwdsl2/setup-ipsec-vpn
|
|
#
|
|
# Copyright (C) 2020-2023 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!
|
|
|
|
# (Optional) Specify which Libreswan version to install. See: https://libreswan.org
|
|
# If not specified, the latest supported version will be installed.
|
|
SWAN_VER=
|
|
|
|
### DO NOT edit below this line ###
|
|
|
|
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
|
|
SYS_DT=$(date +%F-%T | tr ':' '_')
|
|
[ -n "$VPN_UPDATE_SWAN_VER" ] && SWAN_VER="$VPN_UPDATE_SWAN_VER"
|
|
|
|
exiterr() { echo "Error: $1" >&2; exit 1; }
|
|
exiterr2() { exiterr "'yum install' failed."; }
|
|
bigecho() { echo "## $1"; }
|
|
|
|
check_root() {
|
|
if [ "$(id -u)" != 0 ]; then
|
|
exiterr "Script must be run as root. Try 'sudo bash $0'"
|
|
fi
|
|
}
|
|
|
|
check_os() {
|
|
if ! grep -qs "Amazon Linux release 2 " /etc/system-release; then
|
|
exiterr "This script only supports Amazon Linux 2."
|
|
fi
|
|
}
|
|
|
|
check_libreswan() {
|
|
ipsec_ver=$(/usr/local/sbin/ipsec --version 2>/dev/null)
|
|
swan_ver_old=$(printf '%s' "$ipsec_ver" | sed -e 's/.*Libreswan U\?//' -e 's/\( (\|\/K\).*//')
|
|
if ! printf '%s' "$ipsec_ver" | grep -qi 'libreswan'; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: This script requires Libreswan already installed.
|
|
See: https://github.com/hwdsl2/setup-ipsec-vpn
|
|
EOF
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
get_swan_ver() {
|
|
swan_ver_cur=4.12
|
|
base_url="https://github.com/hwdsl2/vpn-extras/releases/download/v1.0.0"
|
|
swan_ver_url="$base_url/upg-v1-amzn-2-swanver"
|
|
swan_ver_latest=$(wget -t 2 -T 10 -qO- "$swan_ver_url" | head -n 1)
|
|
if printf '%s' "$swan_ver_latest" | grep -Eq '^([3-9]|[1-9][0-9]{1,2})(\.([0-9]|[1-9][0-9]{1,2})){1,2}$'; then
|
|
swan_ver_cur="$swan_ver_latest"
|
|
fi
|
|
[ -z "$SWAN_VER" ] && SWAN_VER="$swan_ver_cur"
|
|
}
|
|
|
|
check_swan_ver() {
|
|
if [ "$SWAN_VER" = "4.8" ]; then
|
|
exiterr "Libreswan version 4.8 is not supported."
|
|
fi
|
|
if [ "$SWAN_VER" != "3.32" ] \
|
|
&& { ! printf '%s\n%s' "4.1" "$SWAN_VER" | sort -C -V \
|
|
|| ! printf '%s\n%s' "$SWAN_VER" "$swan_ver_cur" | sort -C -V; }; then
|
|
cat 1>&2 <<EOF
|
|
Error: Libreswan version '$SWAN_VER' is not supported.
|
|
This script can install one of these versions:
|
|
3.32, 4.1-$swan_ver_cur
|
|
EOF
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
show_setup_info() {
|
|
cat <<EOF
|
|
|
|
Welcome! Use this script to update Libreswan on your IPsec VPN server.
|
|
|
|
Current version: Libreswan $swan_ver_old
|
|
Version to install: Libreswan $SWAN_VER
|
|
|
|
Note: This script will make the following changes to your VPN configuration:
|
|
- Fix obsolete ipsec.conf and/or ikev2.conf options
|
|
- Optimize VPN ciphers
|
|
- Update IKEv2 helper script
|
|
Your other VPN config files will not be modified.
|
|
|
|
EOF
|
|
if [ "$SWAN_VER" != "$swan_ver_cur" ]; then
|
|
cat <<'EOF'
|
|
WARNING: Older versions of Libreswan could contain known security vulnerabilities.
|
|
See https://libreswan.org/security/ for more information.
|
|
Are you sure you want to install an older version?
|
|
|
|
EOF
|
|
fi
|
|
if [ "$swan_ver_old" = "$SWAN_VER" ]; then
|
|
cat <<EOF
|
|
Note: You already have Libreswan version $SWAN_VER installed!
|
|
If you continue, the same version will be re-installed.
|
|
|
|
EOF
|
|
fi
|
|
printf "Do you want to continue? [Y/n] "
|
|
read -r response
|
|
case $response in
|
|
[yY][eE][sS]|[yY]|'')
|
|
echo
|
|
;;
|
|
*)
|
|
echo "Abort. No changes were made."
|
|
exit 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
start_setup() {
|
|
mkdir -p /opt/src
|
|
cd /opt/src || exit 1
|
|
}
|
|
|
|
install_pkgs() {
|
|
bigecho "Installing required packages..."
|
|
(
|
|
set -x
|
|
yum -y -q install nss-devel nspr-devel pkgconfig pam-devel \
|
|
libcap-ng-devel libselinux-devel curl-devel nss-tools \
|
|
flex bison gcc make wget sed tar \
|
|
systemd-devel libevent-devel fipscheck-devel >/dev/null
|
|
) || exiterr2
|
|
}
|
|
|
|
get_libreswan() {
|
|
bigecho "Downloading Libreswan..."
|
|
cd /opt/src || exit 1
|
|
swan_file="libreswan-$SWAN_VER.tar.gz"
|
|
swan_url1="https://github.com/libreswan/libreswan/archive/v$SWAN_VER.tar.gz"
|
|
swan_url2="https://download.libreswan.org/$swan_file"
|
|
(
|
|
set -x
|
|
wget -t 3 -T 30 -q -O "$swan_file" "$swan_url1" || wget -t 3 -T 30 -q -O "$swan_file" "$swan_url2"
|
|
) || exit 1
|
|
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
|
tar xzf "$swan_file" && /bin/rm -f "$swan_file"
|
|
}
|
|
|
|
install_libreswan() {
|
|
bigecho "Compiling and installing Libreswan, please wait..."
|
|
cd "libreswan-$SWAN_VER" || exit 1
|
|
service ipsec stop >/dev/null 2>&1
|
|
[ "$SWAN_VER" = "4.1" ] && sed -i 's/ sysv )/ sysvinit )/' programs/setup/setup.in
|
|
cat > Makefile.inc.local <<'EOF'
|
|
WERROR_CFLAGS=-w -s
|
|
USE_DNSSEC=false
|
|
USE_DH2=true
|
|
EOF
|
|
if [ "$SWAN_VER" != "3.32" ]; then
|
|
cat >> Makefile.inc.local <<'EOF'
|
|
USE_NSS_KDF=false
|
|
USE_LINUX_AUDIT=false
|
|
USE_SECCOMP=false
|
|
FINALNSSDIR=/etc/ipsec.d
|
|
EOF
|
|
fi
|
|
if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
|
|
echo "USE_XFRM_INTERFACE_IFLA_HEADER=true" >> Makefile.inc.local
|
|
fi
|
|
NPROCS=$(grep -c ^processor /proc/cpuinfo)
|
|
[ -z "$NPROCS" ] && NPROCS=1
|
|
(
|
|
set -x
|
|
make "-j$((NPROCS+1))" -s base >/dev/null && make -s install-base >/dev/null
|
|
)
|
|
cd /opt/src || exit 1
|
|
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
|
if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qF "$SWAN_VER"; then
|
|
service ipsec start >/dev/null 2>&1
|
|
exiterr "Libreswan $SWAN_VER failed to build."
|
|
fi
|
|
}
|
|
|
|
restore_selinux() {
|
|
restorecon /etc/ipsec.d/*db 2>/dev/null
|
|
restorecon /usr/local/sbin -Rv 2>/dev/null
|
|
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
|
}
|
|
|
|
update_ikev2_script() {
|
|
bigecho "Updating IKEv2 script..."
|
|
cd /opt/src || exit 1
|
|
ikev2_url="https://raw.githubusercontent.com/hwdsl2/setup-ipsec-vpn/master/extras/ikev2setup.sh"
|
|
(
|
|
set -x
|
|
wget -t 3 -T 30 -q -O ikev2.sh.new "$ikev2_url"
|
|
) || /bin/rm -f ikev2.sh.new
|
|
if [ -s ikev2.sh.new ]; then
|
|
[ -s ikev2.sh ] && /bin/cp -f ikev2.sh "ikev2.sh.old-$SYS_DT"
|
|
/bin/cp -f ikev2.sh.new ikev2.sh && chmod +x ikev2.sh \
|
|
&& ln -s /opt/src/ikev2.sh /usr/bin 2>/dev/null
|
|
/bin/rm -f ikev2.sh.new
|
|
fi
|
|
}
|
|
|
|
update_config() {
|
|
bigecho "Updating VPN configuration..."
|
|
IKE_NEW=" ike=aes256-sha2;modp2048,aes128-sha2;modp2048,aes256-sha1;modp2048,aes128-sha1;modp2048"
|
|
PHASE2_NEW=" phase2alg=aes_gcm-null,aes128-sha1,aes256-sha1,aes256-sha2_512,aes128-sha2,aes256-sha2"
|
|
dns_state=0
|
|
DNS_SRV1=$(grep "modecfgdns1=" /etc/ipsec.conf | head -n 1 | cut -d '=' -f 2)
|
|
DNS_SRV2=$(grep "modecfgdns2=" /etc/ipsec.conf | head -n 1 | cut -d '=' -f 2)
|
|
[ -n "$DNS_SRV1" ] && dns_state=2
|
|
[ -n "$DNS_SRV1" ] && [ -n "$DNS_SRV2" ] && dns_state=1
|
|
[ "$(grep -c "modecfgdns1=" /etc/ipsec.conf)" -gt "1" ] && dns_state=3
|
|
sed -i".old-$SYS_DT" \
|
|
-e "s/^[[:space:]]\+auth=/ phase2=/" \
|
|
-e "s/^[[:space:]]\+forceencaps=/ encapsulation=/" \
|
|
-e "s/^[[:space:]]\+ike-frag=/ fragmentation=/" \
|
|
-e "s/^[[:space:]]\+sha2_truncbug=/ sha2-truncbug=/" \
|
|
-e "s/^[[:space:]]\+sha2-truncbug=yes/ sha2-truncbug=no/" \
|
|
-e "s/^[[:space:]]\+ike=.\+/$IKE_NEW/" \
|
|
-e "s/^[[:space:]]\+phase2alg=.\+/$PHASE2_NEW/" /etc/ipsec.conf
|
|
if [ "$dns_state" = 1 ]; then
|
|
sed -i -e "s/^[[:space:]]\+modecfgdns1=.\+/ modecfgdns=\"$DNS_SRV1 $DNS_SRV2\"/" \
|
|
-e "/modecfgdns2=/d" /etc/ipsec.conf
|
|
elif [ "$dns_state" = 2 ]; then
|
|
sed -i "s/^[[:space:]]\+modecfgdns1=.\+/ modecfgdns=$DNS_SRV1/" /etc/ipsec.conf
|
|
fi
|
|
sed -i "/ikev2=never/d" /etc/ipsec.conf
|
|
sed -i "/conn shared/a \ ikev2=never" /etc/ipsec.conf
|
|
if grep -qs ike-frag /etc/ipsec.d/ikev2.conf; then
|
|
sed -i".old-$SYS_DT" 's/^[[:space:]]\+ike-frag=/ fragmentation=/' /etc/ipsec.d/ikev2.conf
|
|
fi
|
|
}
|
|
|
|
restart_ipsec() {
|
|
bigecho "Restarting IPsec service..."
|
|
mkdir -p /run/pluto
|
|
service ipsec restart 2>/dev/null
|
|
}
|
|
|
|
show_setup_complete() {
|
|
cat <<EOF
|
|
|
|
================================================
|
|
|
|
Libreswan $SWAN_VER has been successfully installed!
|
|
|
|
================================================
|
|
|
|
EOF
|
|
if [ "$dns_state" = 3 ]; then
|
|
cat <<'EOF'
|
|
IMPORTANT: You must edit /etc/ipsec.conf and replace
|
|
all occurrences of these two lines:
|
|
modecfgdns1=DNS_SERVER_1
|
|
modecfgdns2=DNS_SERVER_2
|
|
with a single line like this:
|
|
modecfgdns="DNS_SERVER_1 DNS_SERVER_2"
|
|
Then run "sudo service ipsec restart".
|
|
|
|
EOF
|
|
fi
|
|
}
|
|
|
|
vpnupgrade() {
|
|
check_root
|
|
check_os
|
|
check_libreswan
|
|
get_swan_ver
|
|
check_swan_ver
|
|
show_setup_info
|
|
start_setup
|
|
install_pkgs
|
|
get_libreswan
|
|
install_libreswan
|
|
restore_selinux
|
|
update_ikev2_script
|
|
update_config
|
|
restart_ipsec
|
|
show_setup_complete
|
|
}
|
|
|
|
## Defer setup until we have the complete script
|
|
vpnupgrade "$@"
|
|
|
|
exit 0
|