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+#!/bin/sh
+
+# OpenVPN -- An application to securely tunnel IP networks
+# over a single TCP/UDP port, with support for SSL/TLS-based
+# session authentication and key exchange,
+# packet encryption, packet authentication, and
+# packet compression.
+#
+# Copyright (C) 2002-2005 OpenVPN Solutions LLC <info@openvpn.net>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2
+# as published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program (see the file COPYING included with this
+# distribution); if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+# pkitool is a front-end for the openssl tool.
+
+# Calling scripts can set the certificate organizational
+# unit with the KEY_OU environmental variable.
+
+PROGNAME=pkitool
+VERSION=2.0
+DEBUG=0
+
+GREP=grep
+OPENSSL=openssl
+
+need_vars()
+{
+ echo ' Please edit the vars script to reflect your configuration,'
+ echo ' then source it with "source ./vars".'
+ echo ' Next, to start with a fresh PKI configuration and to delete any'
+ echo ' previous certificates and keys, run "./clean-all".'
+ echo " Finally, you can run this tool ($PROGNAME) to build certificates/keys."
+}
+
+usage()
+{
+ echo "$PROGNAME $VERSION"
+ echo "Usage: $PROGNAME [options...] [common-name]"
+ echo "Options:"
+ echo " --batch : batch mode (default)"
+ echo " --interact : interactive mode"
+ echo " --server : build server cert"
+ echo " --initca : build root CA"
+ echo " --inter : build intermediate CA"
+ echo " --pass : encrypt private key with password"
+ echo " --csr : only generate a CSR, do not sign"
+ echo " --sign : sign an existing CSR"
+ echo " --pkcs12 : generate a combined pkcs12 file"
+ echo "Notes:"
+ need_vars
+ echo "Generated files and corresponding OpenVPN directives:"
+ echo '(Files will be placed in the $KEY_DIR directory, defined in ./vars)'
+ echo " ca.crt -> root certificate (--ca)"
+ echo " ca.key -> root key, keep secure (not directly used by OpenVPN)"
+ echo " .crt files -> client/server certificates (--cert)"
+ echo " .key files -> private keys, keep secure (--key)"
+ echo " .csr files -> certificate signing request (not directly used by OpenVPN)"
+ echo " dh1024.pem or dh2048.pem -> Diffie Hellman parameters (--dh)"
+ echo "Examples:"
+ echo " $PROGNAME --initca -> Build root certificate"
+ echo " $PROGNAME --initca --pass -> Build root certificate with password-protected key"
+ echo " $PROGNAME --server server1 -> Build \"server1\" certificate/key"
+ echo " $PROGNAME client1 -> Build \"client1\" certificate/key"
+ echo " $PROGNAME --pass client2 -> Build password-protected \"client2\" certificate/key"
+ echo " $PROGNAME --pkcs12 client3 -> Build \"client3\" certificate/key in PKCS #12 format"
+ echo " $PROGNAME --csr client4 -> Build \"client4\" CSR to be signed by another CA"
+ echo " $PROGNAME --sign client4 -> Sign \"client4\" CSR"
+ echo " $PROGNAME --inter interca -> Build an intermediate key-signing certificate/key"
+ echo " Also see ./inherit-inter script."
+ echo "Typical usage for initial PKI setup. Build myserver, client1, and client2 cert/keys."
+ echo "Protect client2 key with a password. Build DH parms. Generated files in ./keys :"
+ echo " [edit vars with your site-specific info]"
+ echo " source ./vars"
+ echo " ./clean-all"
+ echo " ./build-dh -> takes a long time, consider backgrounding"
+ echo " ./$PROGNAME --initca"
+ echo " ./$PROGNAME --server myserver"
+ echo " ./$PROGNAME client1"
+ echo " ./$PROGNAME --pass client2"
+ echo "Typical usage for adding client cert to existing PKI:"
+ echo " source ./vars"
+ echo " ./$PROGNAME client-new"
+}
+
+# Set defaults
+DO_REQ="1"
+REQ_EXT=""
+DO_CA="1"
+CA_EXT=""
+DO_P12="0"
+DO_ROOT="0"
+NODES_REQ="-nodes"
+NODES_P12=""
+BATCH="-batch"
+CA="ca"
+
+# Process options
+while [ $# -gt 0 ]; do
+ case "$1" in
+ --server ) REQ_EXT="$REQ_EXT -extensions server"
+ CA_EXT="$CA_EXT -extensions server" ;;
+ --batch ) BATCH="-batch" ;;
+ --interact ) BATCH="" ;;
+ --inter ) CA_EXT="$CA_EXT -extensions v3_ca" ;;
+ --initca ) DO_ROOT="1" ;;
+ --pass ) NODES_REQ="" ;;
+ --csr ) DO_CA="0" ;;
+ --sign ) DO_REQ="0" ;;
+ --pkcs12 ) DO_P12="1" ;;
+ --* ) echo "$PROGNAME: unknown option: $1"
+ exit 1 ;;
+ * ) break ;;
+ esac
+ shift
+done
+
+# If we are generating pkcs12, only encrypt the final step
+if [ $DO_P12 -eq 1 ]; then
+ NODES_P12="$NODES_REQ"
+ NODES_REQ="-nodes"
+fi
+
+# If undefined, set default key expiration intervals
+if [ -z "$KEY_EXPIRE" ]; then
+ KEY_EXPIRE=3650
+fi
+if [ -z "$CA_EXPIRE" ]; then
+ CA_EXPIRE=3650
+fi
+
+# Set organizational unit to empty string if undefined
+if [ -z "$KEY_OU" ]; then
+ KEY_OU=""
+fi
+
+# Set KEY_CN
+if [ $DO_ROOT -eq 1 ]; then
+ if [ -z "$KEY_CN" ]; then
+ if [ "$1" ]; then
+ KEY_CN="$1"
+ elif [ "$KEY_ORG" ]; then
+ KEY_CN="$KEY_ORG CA"
+ fi
+ fi
+ if [ $BATCH ] && [ "$KEY_CN" ]; then
+ echo "Using CA Common Name:" $KEY_CN
+ fi
+elif [ $BATCH ] && [ "$KEY_CN" ] && [ $# -eq 0 ]; then
+ echo "Using Common Name:" $KEY_CN
+else
+ if [ $# -ne 1 ]; then
+ usage
+ exit 1
+ else
+ KEY_CN="$1"
+ fi
+fi
+export CA_EXPIRE KEY_EXPIRE KEY_OU KEY_CN
+
+# Show parameters (debugging)
+if [ $DEBUG -eq 1 ]; then
+ echo DO_REQ $DO_REQ
+ echo REQ_EXT $REQ_EXT
+ echo DO_CA $DO_CA
+ echo CA_EXT $CA_EXT
+ echo NODES_REQ $NODES_REQ
+ echo NODES_P12 $NODES_P12
+ echo DO_P12 $DO_P12
+ echo KEY_CN $KEY_CN
+ echo BATCH $BATCH
+ echo DO_ROOT $DO_ROOT
+ echo KEY_EXPIRE $KEY_EXPIRE
+ echo CA_EXPIRE $CA_EXPIRE
+ echo KEY_OU $KEY_OU
+fi
+
+# Make sure ./vars was sourced beforehand
+if [ -d "$KEY_DIR" ] && [ "$KEY_CONFIG" ]; then
+ cd "$KEY_DIR"
+
+ # Make sure $KEY_CONFIG points to the correct version
+ # of openssl.cnf
+ if $GREP -i 'easy-rsa version 2\.[0-9]' "$KEY_CONFIG" >/dev/null; then
+ :
+ else
+ echo "$PROGNAME: KEY_CONFIG (set by the ./vars script) is pointing to the wrong"
+ echo "version of openssl.cnf: $KEY_CONFIG"
+ echo "The correct version should have a comment that says: easy-rsa version 2.x";
+ exit 1;
+ fi
+
+ # Build root CA
+ if [ $DO_ROOT -eq 1 ]; then
+ $OPENSSL req $BATCH -days $CA_EXPIRE $NODES_REQ -new -x509 \
+ -keyout "$CA.key" -out "$CA.crt" -config "$KEY_CONFIG" && \
+ chmod 0600 "$CA.key"
+ else
+ # Make sure CA key/cert is available
+ if [ $DO_CA -eq 1 ] || [ $DO_P12 -eq 1 ]; then
+ if [ ! -r "$CA.crt" ] || [ ! -r "$CA.key" ]; then
+ echo "$PROGNAME: Need a readable $CA.crt and $CA.key in $KEY_DIR"
+ echo "Try $PROGNAME --initca to build a root certificate/key."
+ exit 1
+ fi
+ fi
+
+ # Build cert/key
+ ( [ $DO_REQ -eq 0 ] || $OPENSSL req $BATCH -days $KEY_EXPIRE $NODES_REQ -new \
+ -keyout "$KEY_CN.key" -out "$KEY_CN.csr" $REQ_EXT -config "$KEY_CONFIG" ) && \
+ ( [ $DO_CA -eq 0 ] || $OPENSSL ca $BATCH -days $KEY_EXPIRE -out "$KEY_CN.crt" \
+ -in "$KEY_CN.csr" $CA_EXT -config "$KEY_CONFIG" ) && \
+ ( [ $DO_P12 -eq 0 ] || $OPENSSL pkcs12 -export -inkey "$KEY_CN.key" \
+ -in "$KEY_CN.crt" -certfile "$CA.crt" -out "$KEY_CN.p12" $NODES_P12 ) && \
+ ( [ $DO_CA -eq 0 ] || chmod 0600 "$KEY_CN.key" ) && \
+ ( [ $DO_P12 -eq 0 ] || chmod 0600 "$KEY_CN.p12" )
+
+ fi
+
+# Need definitions
+else
+ need_vars
+fi