175 lines
5.0 KiB
Bash
175 lines
5.0 KiB
Bash
#!/bin/sh
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#
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# Script to upgrade Libreswan on CentOS and RHEL
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#
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# Copyright (C) 2016-2017 Lin Song <linsongui@gmail.com>
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#
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# This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
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# Unported License: http://creativecommons.org/licenses/by-sa/3.0/
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#
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# Attribution required: please include my name in any derivative and let me
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# know how you have improved it!
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# Check https://libreswan.org for the latest version
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swan_ver=3.19
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### DO NOT edit below this line ###
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export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
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exiterr() { echo "Error: $1" >&2; exit 1; }
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exiterr2() { echo "Error: 'yum install' failed." >&2; exit 1; }
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if ! grep -qs -e "release 6" -e "release 7" /etc/redhat-release; then
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exiterr "This script only supports CentOS/RHEL 6 and 7."
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fi
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if [ -f /proc/user_beancounters ]; then
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exiterr "This script does not support OpenVZ VPS."
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fi
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if [ "$(id -u)" != 0 ]; then
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exiterr "Script must be run as root. Try 'sudo sh $0'"
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fi
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if [ -z "$swan_ver" ]; then
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exiterr "Libreswan version 'swan_ver' not specified."
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fi
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if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qs "Libreswan"; then
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exiterr "This script requires Libreswan already installed."
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fi
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if /usr/local/sbin/ipsec --version 2>/dev/null | grep -qs -F "$swan_ver"; then
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echo "You already have Libreswan version $swan_ver installed! "
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echo "If you continue, the same version will be re-installed."
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echo
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printf "Do you wish to continue anyway? [y/N] "
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read -r response
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case $response in
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[yY][eE][sS]|[yY])
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echo
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;;
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*)
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echo "Aborting."
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exit 1
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;;
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esac
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fi
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clear
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cat <<EOF
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Welcome! This script will build and install Libreswan $swan_ver on your server.
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Additional packages required for Libreswan compilation will also be installed.
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This is intended for use on servers running an older version of Libreswan.
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EOF
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cat <<'EOF'
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!!! IMPORTANT NOTE !!!
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The new Libreswan version 3.19 requires some configuration changes.
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This script will make the following changes to your /etc/ipsec.conf:
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Replace this line:
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auth=esp
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with the following:
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phase2=esp
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Replace this line:
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forceencaps=yes
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with the following:
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encapsulation=yes
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Consolidate VPN ciphers for "ike=" and "phase2alg=".
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Re-add "MODP1024" to the list of allowed "ike=" ciphers,
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which was removed from defaults in Libreswan 3.19.
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Your other VPN configuration files will not be modified.
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EOF
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printf "Do you wish to continue? [y/N] "
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read -r response
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case $response in
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[yY][eE][sS]|[yY])
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echo
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echo "Please be patient. Setup is continuing..."
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echo
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;;
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*)
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echo "Aborting."
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exit 1
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;;
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esac
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# Create and change to working dir
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mkdir -p /opt/src
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cd /opt/src || exiterr "Cannot enter /opt/src."
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# Install Wget
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yum -y install wget || exiterr2
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# Add the EPEL repository
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yum -y install epel-release || exiterr2
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# Install necessary packages
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yum -y install nss-devel nspr-devel pkgconfig pam-devel \
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libcap-ng-devel libselinux-devel \
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curl-devel flex bison gcc make \
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fipscheck-devel unbound-devel xmlto || exiterr2
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# Install libevent2 and systemd-devel
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if grep -qs "release 6" /etc/redhat-release; then
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yum -y remove libevent-devel
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yum -y install libevent2-devel || exiterr2
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else
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yum -y install libevent-devel systemd-devel || exiterr2
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fi
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# Compile and install Libreswan
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swan_file="libreswan-$swan_ver.tar.gz"
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swan_url1="https://download.libreswan.org/$swan_file"
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swan_url2="https://github.com/libreswan/libreswan/archive/v$swan_ver.tar.gz"
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if ! { wget -t 3 -T 30 -nv -O "$swan_file" "$swan_url1" || wget -t 3 -T 30 -nv -O "$swan_file" "$swan_url2"; }; then
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exiterr "Cannot download Libreswan source."
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fi
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/bin/rm -rf "/opt/src/libreswan-$swan_ver"
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tar xzf "$swan_file" && /bin/rm -f "$swan_file"
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cd "libreswan-$swan_ver" || exiterr "Cannot enter Libreswan source dir."
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echo "WERROR_CFLAGS =" > Makefile.inc.local
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make -s programs && make -s install
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# Verify the install and clean up
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cd /opt/src || exiterr "Cannot enter /opt/src."
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/bin/rm -rf "/opt/src/libreswan-$swan_ver"
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if ! /usr/local/sbin/ipsec --version 2>/dev/null | grep -qs -F "$swan_ver"; then
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exiterr "Libreswan $swan_ver failed to build."
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fi
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# Restore SELinux contexts
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restorecon /etc/ipsec.d/*db 2>/dev/null
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restorecon /usr/local/sbin -Rv 2>/dev/null
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restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null
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# Update ipsec.conf options
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IKE_NEW=" ike=3des-sha1,3des-sha1;modp1024,aes-sha1,aes-sha1;modp1024,aes-sha2,aes-sha2;modp1024"
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PHASE2_NEW=" phase2alg=3des-sha1,aes-sha1,aes-sha2"
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sed -i.old -e "s/^[[:space:]]\+auth=esp\$/ phase2=esp/" \
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-e "s/^[[:space:]]\+forceencaps=yes\$/ encapsulation=yes/" \
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-e "s/^[[:space:]]\+ike=3des-sha1,aes-sha1\$/$IKE_NEW/" \
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-e "s/^[[:space:]]\+ike=3des-sha1,aes-sha1,aes256-sha2_512,aes256-sha2_256\$/$IKE_NEW/" \
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-e "s/^[[:space:]]\+phase2alg=3des-sha1,aes-sha1\$/$PHASE2_NEW/" \
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-e "s/^[[:space:]]\+phase2alg=3des-sha1,aes-sha1,aes256-sha2_512,aes256-sha2_256\$/$PHASE2_NEW/" /etc/ipsec.conf
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# Restart IPsec service
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service ipsec restart
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echo
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echo "Libreswan $swan_ver was installed successfully! "
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echo
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exit 0
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