Merge pull request #1 from kylemanna/master

Bring fork up to date

Author: HumanPrinter

Dockerfile

@@ -7,18 +7,15 @@ LABEL maintainer="Kyle Manna <[email protected]>"
 
 # Testing: pamtester
 RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing/" >> /etc/apk/repositories && \
-    apk add --update openvpn iptables bash easy-rsa openvpn-auth-pam google-authenticator pamtester && \
+    apk add --update openvpn iptables bash easy-rsa openvpn-auth-pam google-authenticator pamtester libqrencode && \
     ln -s /usr/share/easy-rsa/easyrsa /usr/local/bin && \
     rm -rf /tmp/* /var/tmp/* /var/cache/apk/* /var/cache/distfiles/*
 
 # Needed by scripts
-ENV OPENVPN /etc/openvpn
-ENV EASYRSA /usr/share/easy-rsa
-ENV EASYRSA_PKI $OPENVPN/pki
-ENV EASYRSA_VARS_FILE $OPENVPN/vars
-
-# Prevents refused client connection because of an expired CRL
-ENV EASYRSA_CRL_DAYS 3650
+ENV OPENVPN=/etc/openvpn
+ENV EASYRSA=/usr/share/easy-rsa \
+    EASYRSA_CRL_DAYS=3650 \
+    EASYRSA_PKI=$OPENVPN/pki
 
 VOLUME ["/etc/openvpn"]
 

Dockerfile.aarch64

@@ -15,7 +15,6 @@ RUN echo "http://dl-4.alpinelinux.org/alpine/edge/community/" >> /etc/apk/reposi
 ENV OPENVPN /etc/openvpn
 ENV EASYRSA /usr/share/easy-rsa
 ENV EASYRSA_PKI $OPENVPN/pki
-ENV EASYRSA_VARS_FILE $OPENVPN/vars
 
 # Prevents refused client connection because of an expired CRL
 ENV EASYRSA_CRL_DAYS 3650

README.md

@@ -31,20 +31,20 @@ a corresponding [Digital Ocean Community Tutorial](http://bit.ly/1AGUZkq).
   private key used by the newly generated certificate authority.
 
       docker volume create --name $OVPN_DATA
-      docker run -v $OVPN_DATA:/etc/openvpn --log-driver=none --rm kylemanna/openvpn ovpn_genconfig -u udp://VPN.SERVERNAME.COM
-      docker run -v $OVPN_DATA:/etc/openvpn --log-driver=none --rm -it kylemanna/openvpn ovpn_initpki
+      docker run -v $OVPN_DATA:/etc/openvpn --rm kylemanna/openvpn ovpn_genconfig -u udp://VPN.SERVERNAME.COM
+      docker run -v $OVPN_DATA:/etc/openvpn --rm -it kylemanna/openvpn ovpn_initpki
 
 * Start OpenVPN server process
 
       docker run -v $OVPN_DATA:/etc/openvpn -d -p 1194:1194/udp --cap-add=NET_ADMIN kylemanna/openvpn
 
 * Generate a client certificate without a passphrase
 
-      docker run -v $OVPN_DATA:/etc/openvpn --log-driver=none --rm -it kylemanna/openvpn easyrsa build-client-full CLIENTNAME nopass
+      docker run -v $OVPN_DATA:/etc/openvpn --rm -it kylemanna/openvpn easyrsa build-client-full CLIENTNAME nopass
 
 * Retrieve the client configuration with embedded certificates
 
-      docker run -v $OVPN_DATA:/etc/openvpn --log-driver=none --rm kylemanna/openvpn ovpn_getclient CLIENTNAME > CLIENTNAME.ovpn
+      docker run -v $OVPN_DATA:/etc/openvpn --rm kylemanna/openvpn ovpn_getclient CLIENTNAME > CLIENTNAME.ovpn
 
 ## Next Steps
 
@@ -69,7 +69,7 @@ If you prefer to use `docker-compose` please refer to the [documentation](docs/d
 
 * Create an environment variable with the name DEBUG and value of 1 to enable debug output (using "docker -e").
 
-        docker run -v $OVPN_DATA:/etc/openvpn -p 1194:1194/udp --privileged -e DEBUG=1 kylemanna/openvpn
+        docker run -v $OVPN_DATA:/etc/openvpn -p 1194:1194/udp --cap-add=NET_ADMIN -e DEBUG=1 kylemanna/openvpn
 
 * Test using a client that has openvpn installed correctly
 

bin/easyrsa_vars

@@ -28,6 +28,7 @@ if [ "$2" == "interactive" ]; then
     # Always use time base OTP otherwise storage for counters must be configured somewhere in volume
     google-authenticator --time-based --force -l "${1}@${OVPN_CN}" -s /etc/openvpn/otp/${1}.google_authenticator
 else
+    # Skip confirmation if not running in interctive mode. Essential for integration tests.
     google-authenticator --time-based --disallow-reuse --force --rate-limit=3 --rate-time=30 --window-size=3 \
-        -l "${1}@${OVPN_CN}" -s /etc/openvpn/otp/${1}.google_authenticator
-fi
+        -l "${1}@${OVPN_CN}" -s /etc/openvpn/otp/${1}.google_authenticator --no-confirm
+fi

bin/ovpn_otp_user

@@ -22,7 +22,6 @@ if [ -z "$EASYRSA_PKI" ]; then
 fi
 
 cn="$1"
-parm="$2"
 
 if [ ! -f "$EASYRSA_PKI/private/${cn}.key" ]; then
     echo "Unable to find \"${cn}\", please try again or generate the key first" >&2
@@ -37,25 +36,4 @@ revoke_client_certificate(){
     chmod 644 "$OPENVPN/crl.pem"
 }
 
-remove_files(){
-    rm -v "$EASYRSA_PKI/issued/${1}.crt"
-    rm -v "$EASYRSA_PKI/private/${1}.key"
-    rm -v "$EASYRSA_PKI/reqs/${1}.req"
-}
-
-case "$parm" in
-    "remove")
-        revoke_client_certificate "$cn"
-        remove_files "$cn"
-        ;;
-    "" | "keep")
-        revoke_client_certificate "$cn"
-        ;;
-    *)
-        echo "When revoking a client certificate, this script let you choose if you want to remove the corresponding crt, key and req files." >&2
-        echo "Pease note that the removal of those files is required if you want to generate a new client certificate using the revoked certificate's CN." >&2
-        echo "    1. keep (default): Keep the files." >&2
-        echo "    2. remove: Remove the files." >&2
-        echo "Please specify one of those options as second parameter." >&2
-        ;;
-esac
+revoke_client_certificate "$cn"

bin/ovpn_revokeclient

@@ -39,11 +39,11 @@ function addArg {
 # this allows rules/routing to be altered by supplying this function
 # in an included file, such as ovpn_env.sh
 function setupIptablesAndRouting {
-    iptables -t nat -C POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE || {
+    iptables -t nat -C POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE 2>/dev/null || {
       iptables -t nat -A POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE
     }
     for i in "${OVPN_ROUTES[@]}"; do
-        iptables -t nat -C POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE || {
+        iptables -t nat -C POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE 2>/dev/null || {
           iptables -t nat -A POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE
         }
     done
@@ -87,13 +87,18 @@ fi
 
 ip -6 route show default 2>/dev/null
 if [ $? = 0 ]; then
-    echo "Enabling IPv6 Forwarding"
-    # If this fails, ensure the docker container is run with --privileged
-    # Could be side stepped with `ip netns` madness to drop privileged flag
+    echo "Checking IPv6 Forwarding"
+    if [ "$(</proc/sys/net/ipv6/conf/all/disable_ipv6)" != "0" ]; then
+        echo "Sysctl error for disable_ipv6, please run docker with '--sysctl net.ipv6.conf.all.disable_ipv6=0'"
+    fi
+
+    if [ "$(</proc/sys/net/ipv6/conf/default/forwarding)" != "1" ]; then
+        echo "Sysctl error for default forwarding, please run docker with '--sysctl net.ipv6.conf.default.forwarding=1'"
+    fi
 
-    sysctl -w net.ipv6.conf.all.disable_ipv6=0 || echo "Failed to enable IPv6 support"
-    sysctl -w net.ipv6.conf.default.forwarding=1 || echo "Failed to enable IPv6 Forwarding default"
-    sysctl -w net.ipv6.conf.all.forwarding=1 || echo "Failed to enable IPv6 Forwarding"
+    if [ "$(</proc/sys/net/ipv6/conf/all/forwarding)" != "1" ]; then
+        echo "Sysctl error for all forwarding, please run docker with '--sysctl net.ipv6.conf.all.forwarding=1'"
+    fi
 fi
 
 echo "Running 'openvpn ${ARGS[@]} ${USER_ARGS[@]}'"

bin/ovpn_run

@@ -17,4 +17,4 @@ The [`ovpn_genconfig`](/bin/ovpn_genconfig) script is intended for simple config
 
 * Start the server with:
 
-        docker run -v $PWD:/etc/openvpn -d -p 1194:1194/udp --privileged kylemanna/openvpn
+        docker run -v $PWD:/etc/openvpn -d -p 1194:1194/udp --cap-add=NET_ADMIN kylemanna/openvpn

docs/advanced.md

@@ -21,7 +21,7 @@ specified protocol, adjust the mapping appropriately:
 ## Running a Second Fallback TCP Container
 Instead of choosing between UDP and TCP, you can use both. A single instance of OpenVPN can only listen for a single protocol on a single port, but this image makes it easy to run two instances simultaneously. After building, configuring, and starting a standard container listening for UDP traffic on 1194, you can start a second container listening for tcp traffic on port 443:
 
-    docker run -v $OVPN_DATA:/etc/openvpn --rm -p 443:1194/tcp --privileged kylemanna/openvpn ovpn_run --proto tcp
+    docker run -v $OVPN_DATA:/etc/openvpn --rm -p 443:1194/tcp --cap-add=NET_ADMIN kylemanna/openvpn ovpn_run --proto tcp
 
 `ovpn_run` will load all the values from the default config file, and `--proto tcp` will override the protocol setting.
 

docs/tcp.md

@@ -5,34 +5,46 @@ set -e
 
 OPENVPN_CONFIG=${1:-/client/config.ovpn}
 
-# Run in background, rely on bash for job management
+# For some reason privileged mode creates the char device and cap-add=NET_ADMIN doesn't
+mkdir -p /dev/net
+if [ ! -c /dev/net/tun ]; then
+    mknod /dev/net/tun c 10 200
+fi
+
+# Run in background using bash job management, setup trap to clean-up
+trap "{ jobs -p | xargs -r kill; wait; }" EXIT
 openvpn --config "$OPENVPN_CONFIG" --management 127.0.0.1 9999 &
 
 # Spin waiting for interface to exist signifying connection
 timeout=10
 for i in $(seq $timeout); do
+    # Allow to start-up
+    sleep 0.5
+
+    # Use bash magic to open tcp socket on fd 3 and break when successful
+    exec 3<>/dev/tcp/127.0.0.1/9999 && break
+done
 
-    # Break when connected
-    #echo state | busybox nc 127.0.0.1 9999 | grep -q "CONNECTED,SUCCESS" && break;
+if [ $i -ge $timeout ]; then
+    echo "Error connecting to OpenVPN mgmt interface, i=$i, exiting."
+    exit 2
+fi
 
-    # Bash magic for tcp sockets
-    if exec 3<>/dev/tcp/127.0.0.1/9999; then
-        # Consume all header input
-        while read -t 0.1 <&3; do true; done
-        echo "state" >&3
-        read -t 1 <&3
-        echo -n $REPLY | grep -q "CONNECTED,SUCCESS" && break || true
-        exec 3>&-
-    fi
+# Consume all header input and echo, look for errors here
+while read -t 0.1 <&3; do echo $REPLY; done
 
-    # Else sleep
+# Request state over mgmt interface
+timeout=10
+for i in $(seq $timeout); do
+    echo "state" >&3
+    state=$(head -n1 <&3)
+    echo -n "$state" | grep -q 'CONNECTED,SUCCESS' && break
     sleep 1
 done
 
 if [ $i -ge $timeout ]; then
-    echo "Error starting OpenVPN, i=$i, exiting."
-    exit 2;
+    echo "Error connecting to OpenVPN, i=$i, exiting."
+    exit 3
 fi
 
-# The show is over.
-kill %1
+exec 3>&-