414 lines
14 KiB
Bash
414 lines
14 KiB
Bash
#!/bin/sh
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exitOnError(){
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# $1 must be set to $?
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status=$1
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message=$2
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[ "$message" != "" ] || message="Undefined error"
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if [ $status != 0 ]; then
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printf "[ERROR] $message, with status $status\n"
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exit $status
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fi
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}
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exitIfUnset(){
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# $1 is the name of the variable to check - not the variable itself
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var="$(eval echo "\$$1")"
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if [ -z "$var" ]; then
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printf "[ERROR] Environment variable $1 is not set\n"
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exit 1
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fi
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}
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exitIfNotIn(){
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# $1 is the name of the variable to check - not the variable itself
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# $2 is a string of comma separated possible values
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var="$(eval echo "\$$1")"
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for value in ${2//,/ }
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do
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if [ "$var" = "$value" ]; then
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return 0
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fi
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done
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printf "[ERROR] Environment variable $1 cannot be '$var' and must be one of the following: "
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for value in ${2//,/ }
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do
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printf "$value "
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done
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printf "\n"
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exit 1
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}
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printf " =========================================\n"
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printf " =========================================\n"
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printf " ============= PIA CONTAINER =============\n"
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printf " =========================================\n"
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printf " =========================================\n"
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printf " == by github.com/qdm12 - Quentin McGaw ==\n\n"
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printf "OpenVPN version: $(openvpn --version | head -n 1 | grep -oE "OpenVPN [0-9\.]* " | cut -d" " -f2)\n"
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printf "Unbound version: $(unbound -h | grep "Version" | cut -d" " -f2)\n"
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printf "Iptables version: $(iptables --version | cut -d" " -f2)\n"
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printf "TinyProxy version: $(tinyproxy -v | cut -d" " -f2)\n"
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############################################
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# CHECK PARAMETERS
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############################################
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exitIfUnset USER
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exitIfUnset PASSWORD
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exitIfNotIn ENCRYPTION "normal,strong"
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exitIfNotIn PROTOCOL "tcp,udp"
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exitIfNotIn NONROOT "yes,no"
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cat "/openvpn/$PROTOCOL-$ENCRYPTION/$REGION.ovpn" &> /dev/null
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exitOnError $? "/openvpn/$PROTOCOL-$ENCRYPTION/$REGION.ovpn is not accessible"
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for EXTRA_SUBNET in ${EXTRA_SUBNETS//,/ }; do
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if [ $(echo "$EXTRA_SUBNET" | grep -Eo '^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(/([0-2]?[0-9])|([3]?[0-1]))?$') = "" ]; then
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printf "Extra subnet $EXTRA_SUBNET is not a valid IPv4 subnet of the form 255.255.255.255/31 or 255.255.255.255\n"
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exit 1
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fi
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done
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exitIfNotIn DOT "on,off"
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exitIfNotIn BLOCK_MALICIOUS "on,off"
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exitIfNotIn BLOCK_NSA "on,off"
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if [ "$DOT" == "off" ]; then
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if [ "$BLOCK_MALICIOUS" == "on" ]; then
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printf "DOT is off so BLOCK_MALICIOUS cannot be on\n"
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exit 1
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elif [ "$BLOCK_NSA" == "on" ]; then
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printf "DOT is off so BLOCK_NSA cannot be on\n"
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exit 1
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fi
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fi
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exitIfNotIn PROXY "on,off"
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exitIfNotIn PROXY_LOG_LEVEL "Info,Warning,Error,Critical"
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if [ -z $PROXY_PORT ]; then
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PROXY_PORT=8888
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fi
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if [ `echo $PROXY_PORT | grep -E "^[0-9]+$"` != $PROXY_PORT ]; then
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printf "PROXY_PORT is not a valid number\n"
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exit 1
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elif [ $PROXY_PORT -lt 1024 ]; then
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printf "PROXY_PORT cannot be a privileged port under port 1024\n"
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exit 1
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elif [ $PROXY_PORT -gt 65535 ]; then
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printf "PROXY_PORT cannot be a port higher than the maximum port 65535\n"
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exit 1
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fi
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if [ ! -z "$PROXY_USER" ] && [ -z "$PROXY_PASSWORD" ]; then
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printf "PROXY_USER is set but PROXY_PASSWORD is unset\n"
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exit 1
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elif [ -z "$PROXY_USER" ] && [ ! -z "$PROXY_PASSWORD" ]; then
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printf "PROXY_USER is unset but PROXY_PASSWORD is set\n"
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exit 1
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fi
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############################################
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# SHOW PARAMETERS
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############################################
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printf "\n"
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printf "OpenVPN parameters:\n"
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printf " * Region: $REGION\n"
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printf " * Encryption: $ENCRYPTION\n"
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printf " * Protocol: $PROTOCOL\n"
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printf " * Running without root: $NONROOT\n"
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printf "DNS over TLS:\n"
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printf " * Activated: $DOT\n"
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if [ "$DOT" = "on" ]; then
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printf " * Malicious hostnames DNS blocking: $BLOCK_MALICIOUS\n"
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printf " * NSA related DNS blocking: $BLOCK_NSA\n"
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printf " * Unblocked hostnames: $UNBLOCK\n"
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fi
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printf "Local network parameters:\n"
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printf " * Extra subnets: $EXTRA_SUBNETS\n"
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printf " * Web proxy activated: $PROXY\n"
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printf " * Web proxy port: $PROXY_PORT\n"
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proxy_auth=yes
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if [ -z $PROXY_USER ]; then
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proxy_auth=no
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fi
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printf " * Web proxy has authentication: $proxy_auth\n"
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unset -v proxy_auth
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printf "\n"
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#####################################################
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# Writes to protected file and remove USER, PASSWORD
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#####################################################
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if [ -f /auth.conf ]; then
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printf "[INFO] /auth.conf already exists\n"
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else
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printf "[INFO] Writing USER and PASSWORD to protected file /auth.conf..."
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echo "$USER" > /auth.conf
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exitOnError $?
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echo "$PASSWORD" >> /auth.conf
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exitOnError $?
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chown nonrootuser /auth.conf
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exitOnError $?
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chmod 400 /auth.conf
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exitOnError $?
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printf "DONE\n"
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printf "[INFO] Clearing environment variables USER and PASSWORD..."
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unset -v USER
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unset -v PASSWORD
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printf "DONE\n"
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fi
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############################################
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# CHECK FOR TUN DEVICE
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############################################
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if [ "$(cat /dev/net/tun 2>&1 /dev/null)" != "cat: read error: File descriptor in bad state" ]; then
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printf "[WARNING] TUN device is not available, creating it..."
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mkdir -p /dev/net
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mknod /dev/net/tun c 10 200
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exitOnError $?
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chmod 0666 /dev/net/tun
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printf "DONE\n"
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fi
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############################################
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# BLOCKING MALICIOUS HOSTNAMES AND IPs WITH UNBOUND
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############################################
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if [ "$DOT" == "on" ]; then
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rm -f /etc/unbound/blocks-malicious.conf
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if [ "$BLOCK_MALICIOUS" = "on" ]; then
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tar -xjf /etc/unbound/blocks-malicious.bz2 -C /etc/unbound/
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printf "[INFO] $(cat /etc/unbound/blocks-malicious.conf | grep "local-zone" | wc -l ) malicious hostnames and $(cat /etc/unbound/blocks-malicious.conf | grep "private-address" | wc -l) malicious IP addresses blacklisted\n"
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else
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echo "" > /etc/unbound/blocks-malicious.conf
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fi
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if [ "$BLOCK_NSA" = "on" ]; then
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tar -xjf /etc/unbound/blocks-nsa.bz2 -C /etc/unbound/
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printf "[INFO] $(cat /etc/unbound/blocks-nsa.conf | grep "local-zone" | wc -l ) NSA hostnames blacklisted\n"
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cat /etc/unbound/blocks-nsa.conf >> /etc/unbound/blocks-malicious.conf
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rm /etc/unbound/blocks-nsa.conf
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sort -u -o /etc/unbound/blocks-malicious.conf /etc/unbound/blocks-malicious.conf
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fi
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for hostname in ${UNBLOCK//,/ }
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do
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printf "[INFO] Unblocking hostname $hostname\n"
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sed -i "/$hostname/d" /etc/unbound/blocks-malicious.conf
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done
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fi
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############################################
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# SETTING DNS OVER TLS TO 1.1.1.1 / 1.0.0.1
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############################################
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if [ "$DOT" == "on" ]; then
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printf "[INFO] Launching Unbound to connect to Cloudflare DNS 1.1.1.1 over TLS..."
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unbound
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exitOnError $?
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printf "DONE\n"
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printf "[INFO] Changing DNS to localhost..."
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printf "`sed '/^nameserver /d' /etc/resolv.conf`\nnameserver 127.0.0.1\n" > /etc/resolv.conf
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exitOnError $?
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printf "DONE\n"
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fi
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############################################
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# Reading chosen OpenVPN configuration
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############################################
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printf "[INFO] Reading OpenVPN configuration...\n"
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CONNECTIONSTRING=$(grep -i "/openvpn/$PROTOCOL-$ENCRYPTION/$REGION.ovpn" -e 'privateinternetaccess.com')
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exitOnError $?
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PORT=$(echo $CONNECTIONSTRING | cut -d' ' -f3)
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if [ "$PORT" = "" ]; then
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printf "[ERROR] Port not found in /openvpn/$PROTOCOL-$ENCRYPTION/$REGION.ovpn\n"
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exit 1
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fi
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PIADOMAIN=$(echo $CONNECTIONSTRING | cut -d' ' -f2)
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if [ "$PIADOMAIN" = "" ]; then
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printf "[ERROR] Domain not found in /openvpn/$PROTOCOL-$ENCRYPTION/$REGION.ovpn\n"
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exit 1
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fi
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printf " * Port: $PORT\n"
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printf " * Domain: $PIADOMAIN\n"
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printf "[INFO] Detecting IP addresses corresponding to $PIADOMAIN...\n"
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VPNIPS=$(nslookup $PIADOMAIN localhost | tail -n +3 | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}')
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exitOnError $?
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for ip in $VPNIPS; do
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printf " $ip\n";
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done
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############################################
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# Writing target OpenVPN files
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############################################
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TARGET_PATH="/openvpn/target"
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printf "[INFO] Creating target OpenVPN files in $TARGET_PATH..."
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rm -rf $TARGET_PATH/*
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cd "/openvpn/$PROTOCOL-$ENCRYPTION"
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cp -f *.crt "$TARGET_PATH"
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exitOnError $? "Cannot copy crt file to $TARGET_PATH"
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cp -f *.pem "$TARGET_PATH"
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exitOnError $? "Cannot copy pem file to $TARGET_PATH"
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cp -f "$REGION.ovpn" "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot copy $REGION.ovpn file to $TARGET_PATH"
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sed -i "/$CONNECTIONSTRING/d" "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot delete '$CONNECTIONSTRING' from $TARGET_PATH/config.ovpn"
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sed -i '/resolv-retry/d' "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot delete 'resolv-retry' from $TARGET_PATH/config.ovpn"
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for ip in $VPNIPS; do
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echo "remote $ip $PORT" >> "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot add 'remote $ip $PORT' to $TARGET_PATH/config.ovpn"
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done
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# Uses the username/password from this file to get the token from PIA
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echo "auth-user-pass /auth.conf" >> "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot add 'auth-user-pass /auth.conf' to $TARGET_PATH/config.ovpn"
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# Reconnects automatically on failure
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echo "auth-retry nointeract" >> "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot add 'auth-retry nointeract' to $TARGET_PATH/config.ovpn"
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# Prevents auth_failed infinite loops - make it interact? Remove persist-tun? nobind?
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echo "pull-filter ignore \"auth-token\"" >> "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot add 'pull-filter ignore \"auth-token\"' to $TARGET_PATH/config.ovpn"
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# Runs openvpn without root, as nonrootuser if specified
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if [ "$NONROOT" = "yes" ]; then
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echo "user nonrootuser" >> "$TARGET_PATH/config.ovpn"
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exitOnError $? "Cannot add 'user nonrootuser' to $TARGET_PATH/config.ovpn"
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fi
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# Note: TUN device re-opening will restart the container due to permissions
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printf "DONE\n"
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############################################
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# NETWORKING
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############################################
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printf "[INFO] Finding network properties...\n"
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printf " * Detecting default gateway..."
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DEFAULT_GATEWAY=$(ip r | grep 'default via' | cut -d" " -f 3)
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exitOnError $?
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printf "$DEFAULT_GATEWAY\n"
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printf " * Detecting local interface..."
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INTERFACE=$(ip r | grep 'default via' | cut -d" " -f 5)
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exitOnError $?
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printf "$INTERFACE\n"
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printf " * Detecting local subnet..."
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SUBNET=$(ip r | grep -v 'default via' | grep $INTERFACE | tail -n 1 | cut -d" " -f 1)
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exitOnError $?
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printf "$SUBNET\n"
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for EXTRASUBNET in ${EXTRA_SUBNETS//,/ }
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do
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printf " * Adding $EXTRASUBNET as route via $INTERFACE..."
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ip route add $EXTRASUBNET via $DEFAULT_GATEWAY dev $INTERFACE
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exitOnError $?
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printf "DONE\n"
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done
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printf " * Detecting target VPN interface..."
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VPN_DEVICE=$(cat $TARGET_PATH/config.ovpn | grep 'dev ' | cut -d" " -f 2)0
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exitOnError $?
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printf "$VPN_DEVICE\n"
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############################################
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# FIREWALL
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############################################
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printf "[INFO] Setting firewall\n"
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printf " * Blocking everyting\n"
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printf " * Deleting all iptables rules..."
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iptables --flush
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exitOnError $?
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iptables --delete-chain
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exitOnError $?
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iptables -t nat --flush
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exitOnError $?
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iptables -t nat --delete-chain
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exitOnError $?
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printf "DONE\n"
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printf " * Block input traffic..."
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iptables -P INPUT DROP
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exitOnError $?
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printf "DONE\n"
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printf " * Block output traffic..."
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iptables -F OUTPUT
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exitOnError $?
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iptables -P OUTPUT DROP
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exitOnError $?
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printf "DONE\n"
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printf " * Block forward traffic..."
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iptables -P FORWARD DROP
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exitOnError $?
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printf "DONE\n"
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printf " * Creating general rules\n"
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printf " * Accept established and related input and output traffic..."
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iptables -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
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exitOnError $?
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iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
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exitOnError $?
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printf "DONE\n"
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printf " * Accept local loopback input and output traffic..."
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iptables -A OUTPUT -o lo -j ACCEPT
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exitOnError $?
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iptables -A INPUT -i lo -j ACCEPT
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exitOnError $?
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printf "DONE\n"
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printf " * Creating VPN rules\n"
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for ip in $VPNIPS; do
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printf " * Accept output traffic to VPN server $ip through $INTERFACE, port $PROTOCOL $PORT..."
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iptables -A OUTPUT -d $ip -o $INTERFACE -p $PROTOCOL -m $PROTOCOL --dport $PORT -j ACCEPT
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exitOnError $?
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printf "DONE\n"
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done
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printf " * Accept all output traffic through $VPN_DEVICE..."
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iptables -A OUTPUT -o $VPN_DEVICE -j ACCEPT
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exitOnError $?
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printf "DONE\n"
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printf " * Creating local subnet rules\n"
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printf " * Accept input and output traffic to and from $SUBNET..."
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iptables -A INPUT -s $SUBNET -d $SUBNET -j ACCEPT
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iptables -A OUTPUT -s $SUBNET -d $SUBNET -j ACCEPT
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printf "DONE\n"
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for EXTRASUBNET in ${EXTRA_SUBNETS//,/ }
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do
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printf " * Accept input traffic through $INTERFACE from $EXTRASUBNET to $SUBNET..."
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iptables -A INPUT -i $INTERFACE -s $EXTRASUBNET -d $SUBNET -j ACCEPT
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exitOnError $?
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printf "DONE\n"
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# iptables -A OUTPUT -d $EXTRASUBNET -j ACCEPT
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# iptables -A OUTPUT -o $INTERFACE -s $SUBNET -d $EXTRASUBNET -j ACCEPT
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done
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############################################
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# TINYPROXY LAUNCH
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############################################
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if [ "$PROXY" == "on" ]; then
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printf "[INFO] Setting TinyProxy log level to $PROXY_LOG_LEVEL..."
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sed -i "/LogLevel /c\LogLevel $PROXY_LOG_LEVEL" /etc/tinyproxy/tinyproxy.conf
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exitOnError $?
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printf "DONE\n"
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if [ ! -z "$PROXY_PORT" ]; then
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printf "[INFO] Setting TinyProxy port to $PROXY_PORT..."
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sed -i "/Port /c\Port $PROXY_PORT" /etc/tinyproxy/tinyproxy.conf
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exitOnError $?
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printf "DONE\n"
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fi
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if [ ! -z "$PROXY_USER" ]; then
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printf "[INFO] Setting TinyProxy credentials..."
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echo "BasicAuth $PROXY_USER $PROXY_PASSWORD" >> /etc/tinyproxy/tinyproxy.conf
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unset -v PROXY_USER
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unset -v PROXY_PASSWORD
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printf "DONE\n"
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fi
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printf "[INFO] Launching HTTP proxy TinyProxy..."
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tinyproxy
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exitOnError $?
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printf "DONE\n"
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fi
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############################################
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# READ FORWARDED PORT
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############################################
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if [ "$PORT_FORWARDING" == "true" ]; then
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sleep 10 && /portforward.sh &
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fi
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############################################
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# OPENVPN LAUNCH
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############################################
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printf "[INFO] Launching OpenVPN\n"
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cd "$TARGET_PATH"
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openvpn --config config.ovpn "$@"
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status=$?
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printf "\n =========================================\n"
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printf " OpenVPN exit with status $status\n"
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printf " =========================================\n\n"
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