24.5. Create the /usr/bin/sign.sh program file

         #!/bin/sh
         ##
         ##  sign.sh -- Sign a SSL Certificate Request (CSR)
         ##  Copyright (c) 1998-1999 Ralf S. Engelschall, All Rights Reserved. 
         ##

         #   argument line handling
         CSR=$1
         if [ $# -ne 1 ]; then
         echo "Usage: sign.sign <whatever>.csr"; exit 1
         fi
         if [ ! -f $CSR ]; then
         echo "CSR not found: $CSR"; exit 1
         fi
         case $CSR in
         *.csr ) CERT="`echo $CSR | sed -e 's/\.csr/.crt/'`" ;;
         * ) CERT="$CSR.crt" ;;
         esac

         #   make sure environment exists
         if [ ! -d ca.db.certs ]; then
         mkdir ca.db.certs
         fi
         if [ ! -f ca.db.serial ]; then
         echo '01' >ca.db.serial
         fi
         if [ ! -f ca.db.index ]; then
         cp /dev/null ca.db.index
         fi

         #   create an own SSLeay config
         cat >ca.config <<EOT
         [ ca ]
         default_ca	= CA_own
         [ CA_own ]
         dir	= /etc/ssl
         certs	= /etc/ssl/certs
         new_certs_dir	= /etc/ssl/ca.db.certs
         database	= /etc/ssl/ca.db.index
         serial	= /etc/ssl/ca.db.serial
         RANDFILE	= /etc/ssl/ca.db.rand
         certificate	= /etc/ssl/certs/ca.crt
         private_key	= /etc/ssl/private/ca.key
         default_days	= 365
         default_crl_days	= 30
         default_md	= md5
         preserve	= no
         policy	= policy_anything
         [ policy_anything ]
         countryName	= optional
         stateOrProvinceName	= optional
         localityName	= optional
         organizationName	= optional
         organizationalUnitName	= optional
         commonName	= supplied
         emailAddress	= optional
         EOT

         #  sign the certificate
         echo "CA signing: $CSR -> $CERT:"
         openssl ca -config ca.config -out $CERT -infiles $CSR
         echo "CA verifying: $CERT <-> CA cert"
         openssl verify -CAfile /etc/ssl/certs/ca.crt $CERT

         #  cleanup after SSLeay 
         rm -f ca.config
         rm -f ca.db.serial.old
         rm -f ca.db.index.old

         #  die gracefully
         exit 0