280 lines
8.3 KiB
Bash
280 lines
8.3 KiB
Bash
#!/bin/sh
|
|
#
|
|
# Script to upgrade Libreswan on CentOS and RHEL
|
|
#
|
|
# The latest version of this script is available at:
|
|
# https://github.com/hwdsl2/setup-ipsec-vpn
|
|
#
|
|
# Copyright (C) 2016-2020 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!
|
|
|
|
# Specify which Libreswan version to install. See: https://libreswan.org
|
|
SWAN_VER=4.1
|
|
|
|
### DO NOT edit below this line ###
|
|
|
|
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
|
|
|
|
exiterr() { echo "Error: $1" >&2; exit 1; }
|
|
exiterr2() { exiterr "'yum install' failed."; }
|
|
|
|
vpnupgrade() {
|
|
|
|
if ! grep -qs -e "release 7" -e "release 8" /etc/redhat-release; then
|
|
echo "Error: This script only supports CentOS/RHEL 7 and 8." >&2
|
|
echo "For Ubuntu/Debian, use https://git.io/vpnupgrade" >&2
|
|
exit 1
|
|
fi
|
|
|
|
if [ -f /proc/user_beancounters ]; then
|
|
exiterr "OpenVZ VPS is not supported."
|
|
fi
|
|
|
|
if [ "$(id -u)" != 0 ]; then
|
|
exiterr "Script must be run as root. Try 'sudo sh $0'"
|
|
fi
|
|
|
|
case "$SWAN_VER" in
|
|
3.2[679]|3.3[12]|4.1)
|
|
/bin/true
|
|
;;
|
|
*)
|
|
cat 1>&2 <<EOF
|
|
Error: Libreswan version '$SWAN_VER' is not supported.
|
|
This script can install one of the following versions:
|
|
3.26-3.27, 3.29, 3.31-3.32 or 4.1
|
|
EOF
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
ipsec_ver=$(/usr/local/sbin/ipsec --version 2>/dev/null)
|
|
ipsec_ver_short=$(printf '%s' "$ipsec_ver" | sed -e 's/Linux Libreswan/Libreswan/' -e 's/ (netkey) on .*//')
|
|
swan_ver_old=$(printf '%s' "$ipsec_ver_short" | sed -e 's/Libreswan //')
|
|
if ! printf '%s' "$ipsec_ver" | grep -q "Libreswan"; then
|
|
cat 1>&2 <<'EOF'
|
|
Error: This script requires Libreswan already installed.
|
|
See: https://github.com/hwdsl2/setup-ipsec-vpn
|
|
EOF
|
|
exit 1
|
|
fi
|
|
|
|
if [ "$swan_ver_old" = "$SWAN_VER" ]; then
|
|
echo "You already have Libreswan version $SWAN_VER installed! "
|
|
echo "If you continue, the same version will be re-installed."
|
|
echo
|
|
printf "Do you want to continue anyway? [y/N] "
|
|
read -r response
|
|
case $response in
|
|
[yY][eE][sS]|[yY])
|
|
echo
|
|
;;
|
|
*)
|
|
echo "Abort. No changes were made."
|
|
exit 1
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
clear
|
|
|
|
cat <<EOF
|
|
Welcome! This script will build and install Libreswan on your server.
|
|
Additional packages required for compilation will also be installed.
|
|
|
|
It is intended for upgrading servers to a newer Libreswan version.
|
|
|
|
Current version: $ipsec_ver_short
|
|
Version to install: Libreswan $SWAN_VER
|
|
|
|
EOF
|
|
|
|
cat <<'EOF'
|
|
NOTE: This script will make the following changes to your IPsec config:
|
|
- Fix obsolete ipsec.conf and/or ikev2.conf options
|
|
- Optimize VPN ciphers
|
|
|
|
Your other VPN configuration files will not be modified.
|
|
|
|
EOF
|
|
|
|
case "$SWAN_VER" in
|
|
3.2[679]|3.3[12])
|
|
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
|
|
;;
|
|
esac
|
|
|
|
printf "Do you want to continue? [y/N] "
|
|
read -r response
|
|
case $response in
|
|
[yY][eE][sS]|[yY])
|
|
echo
|
|
echo "Please be patient. Setup is continuing..."
|
|
echo
|
|
;;
|
|
*)
|
|
echo "Abort. No changes were made."
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
# Create and change to working dir
|
|
mkdir -p /opt/src
|
|
cd /opt/src || exit 1
|
|
|
|
# Add the EPEL repository
|
|
epel_url="https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm -E '%{rhel}').noarch.rpm"
|
|
yum -y install epel-release || yum -y install "$epel_url" || exiterr2
|
|
|
|
# Install necessary packages
|
|
yum -y install nss-devel nspr-devel pkgconfig pam-devel \
|
|
libcap-ng-devel libselinux-devel curl-devel nss-tools \
|
|
flex bison gcc make wget sed tar || exiterr2
|
|
|
|
REPO1='--enablerepo=*server-*optional*'
|
|
REPO2='--enablerepo=*releases-optional*'
|
|
REPO3='--enablerepo=[Pp]ower[Tt]ools'
|
|
|
|
if grep -qs "release 7" /etc/redhat-release; then
|
|
yum -y install systemd-devel || exiterr2
|
|
yum "$REPO1" "$REPO2" -y install libevent-devel fipscheck-devel || exiterr2
|
|
else
|
|
if grep -qs "Red Hat" /etc/redhat-release; then
|
|
REPO3='--enablerepo=codeready-builder-for-rhel-8-*'
|
|
fi
|
|
yum "$REPO3" -y install systemd-devel libevent-devel fipscheck-devel || exiterr2
|
|
fi
|
|
|
|
# Compile and install Libreswan
|
|
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/$swan_file"
|
|
if ! { wget -t 3 -T 30 -nv -O "$swan_file" "$swan_url1" || wget -t 3 -T 30 -nv -O "$swan_file" "$swan_url2"; }; then
|
|
exit 1
|
|
fi
|
|
/bin/rm -rf "/opt/src/libreswan-$SWAN_VER"
|
|
tar xzf "$swan_file" && /bin/rm -f "$swan_file"
|
|
cd "libreswan-$SWAN_VER" || exit 1
|
|
[ "$SWAN_VER" = "3.26" ] && sed -i 's/-lfreebl //' mk/config.mk
|
|
[ "$SWAN_VER" = "3.26" ] && sed -i '/blapi\.h/d' programs/pluto/keys.c
|
|
if [ "$SWAN_VER" = "3.31" ]; then
|
|
sed -i '916iif (!st->st_seen_fragvid) { return FALSE; }' programs/pluto/ikev2.c
|
|
sed -i '1033s/if (/if (LIN(POLICY_IKE_FRAG_ALLOW, sk->ike->sa.st_connection->policy) \&\& sk->ike->sa.st_seen_fragvid \&\& /' \
|
|
programs/pluto/ikev2_message.c
|
|
fi
|
|
[ "$SWAN_VER" = "4.1" ] && sed -i 's/ sysv )/ sysvinit )/' programs/setup/setup.in
|
|
cat > Makefile.inc.local <<'EOF'
|
|
WERROR_CFLAGS=-w
|
|
USE_DNSSEC=false
|
|
EOF
|
|
if [ "$SWAN_VER" = "3.31" ] || [ "$SWAN_VER" = "3.32" ] || [ "$SWAN_VER" = "4.1" ]; then
|
|
echo "USE_DH2=true" >> Makefile.inc.local
|
|
if ! grep -qs IFLA_XFRM_LINK /usr/include/linux/if_link.h; then
|
|
echo "USE_XFRM_INTERFACE_IFLA_HEADER=true" >> Makefile.inc.local
|
|
fi
|
|
fi
|
|
if [ "$SWAN_VER" = "4.1" ]; then
|
|
echo "USE_NSS_KDF=false" >> Makefile.inc.local
|
|
echo "FINALNSSDIR=/etc/ipsec.d" >> Makefile.inc.local
|
|
fi
|
|
NPROCS=$(grep -c ^processor /proc/cpuinfo)
|
|
[ -z "$NPROCS" ] && NPROCS=1
|
|
make "-j$((NPROCS+1))" -s base && make -s install-base
|
|
|
|
# Verify the install and clean up
|
|
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
|
|
exiterr "Libreswan $SWAN_VER failed to build."
|
|
fi
|
|
|
|
# Restore SELinux contexts
|
|
restorecon /etc/ipsec.d/*db 2>/dev/null
|
|
restorecon /usr/local/sbin -Rv 2>/dev/null
|
|
restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
|
|
|
|
# Update IPsec config
|
|
IKE_NEW=" ike=aes256-sha2,aes128-sha2,aes256-sha1,aes128-sha1,aes256-sha2;modp1024,aes128-sha1;modp1024"
|
|
PHASE2_NEW=" phase2alg=aes_gcm-null,aes128-sha1,aes256-sha1,aes256-sha2_512,aes128-sha2,aes256-sha2"
|
|
|
|
dns_state=0
|
|
DNS_SRV1=$(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
|
|
[ "$(grep -c "modecfgdns1=" /etc/ipsec.conf)" -gt "1" ] && dns_state=3
|
|
|
|
sed -i".old-$(date +%F-%T)" \
|
|
-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=$DNS_SRV1/" /etc/ipsec.conf
|
|
fi
|
|
|
|
case "$SWAN_VER" in
|
|
3.29|3.3[12]|4.1)
|
|
sed -i "/ikev2=never/d" /etc/ipsec.conf
|
|
sed -i "/conn shared/a \ ikev2=never" /etc/ipsec.conf
|
|
;;
|
|
esac
|
|
|
|
if grep -qs ike-frag /etc/ipsec.d/ikev2.conf; then
|
|
sed -i 's/^[[:space:]]\+ike-frag=/ fragmentation=/' /etc/ipsec.d/ikev2.conf
|
|
fi
|
|
|
|
# Restart IPsec service
|
|
mkdir -p /run/pluto
|
|
service ipsec restart
|
|
|
|
cat <<EOF
|
|
|
|
|
|
================================================
|
|
|
|
Libreswan $SWAN_VER has been successfully installed!
|
|
|
|
================================================
|
|
|
|
EOF
|
|
|
|
if [ "$dns_state" = "3" ]; then
|
|
cat <<'EOF'
|
|
IMPORTANT: Users upgrading to Libreswan 3.23 or newer 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
|
|
|
|
}
|
|
|
|
## Defer setup until we have the complete script
|
|
vpnupgrade "$@"
|
|
|
|
exit 0
|