contrib/cygwin/ssh-host-config - security/openssh-library - Rivoreo Source Code Repositories

 #!/bin/bash
 #
 # ssh-host-config, Copyright 2000, 2001, 2002, 2003 Red Hat Inc.
 #
 # This file is part of the Cygwin port of OpenSSH.

 # Subdirectory where the new package is being installed
 PREFIX=/usr

 # Directory where the config files are stored
 SYSCONFDIR=/etc
 LOCALSTATEDIR=/var

 progname=$0
 auto_answer=""
 port_number=22

 privsep_configured=no
 privsep_used=yes
 sshd_in_passwd=no
 sshd_in_sam=no

 request()
 {
   if [ "${auto_answer}" = "yes" ]
   then
     echo "$1 (yes/no) yes"
     return 0
   elif [ "${auto_answer}" = "no" ]
   then
     echo "$1 (yes/no) no"
     return 1
   fi

   answer=""
   while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
   do
     echo -n "$1 (yes/no) "
     read -e answer
   done
   if [ "X${answer}" = "Xyes" ]
   then
     return 0
   else
     return 1
   fi
 }

 # Check options

 while :
 do
   case $# in
   0)
     break
     ;;
   esac

   option=$1
   shift

   case "${option}" in
   -d | --debug )
     set -x
     ;;

   -y | --yes )
     auto_answer=yes
     ;;

   -n | --no )
     auto_answer=no
     ;;

   -c | --cygwin )
     cygwin_value="$1"
     shift
     ;;

   -p | --port )
     port_number=$1
     shift
     ;;

   -w | --pwd )
     password_value="$1"
     shift
     ;;

   *)
     echo "usage: ${progname} [OPTION]..."
     echo
     echo "This script creates an OpenSSH host configuration."
     echo
     echo "Options:"
     echo "  --debug  -d            Enable shell's debug output."
     echo "  --yes    -y            Answer all questions with \"yes\" automatically."
     echo "  --no     -n            Answer all questions with \"no\" automatically."
     echo "  --cygwin -c <options>  Use \"options\" as value for CYGWIN environment var."
     echo "  --port   -p <n>        sshd listens on port n."
     echo "  --pwd    -w <passwd>   Use \"pwd\" as password for user 'sshd_server'."
     echo
     exit 1
     ;;

   esac
 done

 # Check if running on NT
 _sys="`uname`"
 _nt=`expr "${_sys}" : "CYGWIN_NT"`
 # If running on NT, check if running under 2003 Server or later
 if [ ${_nt} -gt 0 ]
 then
   _nt2003=`uname | awk -F- '{print ( $2 >= 5.2 ) ? 1 : 0;}'`
 fi

 # Check for running ssh/sshd processes first. Refuse to do anything while
 # some ssh processes are still running

 if ps -ef | grep -v grep | grep -q ssh
 then
   echo
   echo "There are still ssh processes running. Please shut them down first."
   echo
   exit 1
 fi

 # Check for ${SYSCONFDIR} directory

 if [ -e "${SYSCONFDIR}" -a ! -d "${SYSCONFDIR}" ]
 then
   echo
   echo "${SYSCONFDIR} is existant but not a directory."
   echo "Cannot create global configuration files."
   echo
   exit 1
 fi

 # Create it if necessary

 if [ ! -e "${SYSCONFDIR}" ]
 then
   mkdir "${SYSCONFDIR}"
   if [ ! -e "${SYSCONFDIR}" ]
   then
     echo
     echo "Creating ${SYSCONFDIR} directory failed"
     echo
     exit 1
   fi
 fi

 # Create /var/log and /var/log/lastlog if not already existing

 if [ -f ${LOCALSTATEDIR}/log ]
 then
   echo "Creating ${LOCALSTATEDIR}/log failed!"
 else
   if [ ! -d ${LOCALSTATEDIR}/log ]
   then
     mkdir -p ${LOCALSTATEDIR}/log
   fi
   if [ -d ${LOCALSTATEDIR}/log/lastlog ]
   then
     chmod 777 ${LOCALSTATEDIR}/log/lastlog
   elif [ ! -f ${LOCALSTATEDIR}/log/lastlog ]
   then
     cat /dev/null > ${LOCALSTATEDIR}/log/lastlog
     chmod 666 ${LOCALSTATEDIR}/log/lastlog
   fi
 fi

 # Create /var/empty file used as chroot jail for privilege separation
 if [ -f ${LOCALSTATEDIR}/empty ]
 then
   echo "Creating ${LOCALSTATEDIR}/empty failed!"
 else
   mkdir -p ${LOCALSTATEDIR}/empty
   if [ ${_nt} -gt 0 ]
   then
     chmod 755 ${LOCALSTATEDIR}/empty
   fi
 fi

 # First generate host keys if not already existing

 if [ ! -f "${SYSCONFDIR}/ssh_host_key" ]
 then
   echo "Generating ${SYSCONFDIR}/ssh_host_key"
   ssh-keygen -t rsa1 -f ${SYSCONFDIR}/ssh_host_key -N '' > /dev/null
 fi

 if [ ! -f "${SYSCONFDIR}/ssh_host_rsa_key" ]
 then
   echo "Generating ${SYSCONFDIR}/ssh_host_rsa_key"
   ssh-keygen -t rsa -f ${SYSCONFDIR}/ssh_host_rsa_key -N '' > /dev/null
 fi

 if [ ! -f "${SYSCONFDIR}/ssh_host_dsa_key" ]
 then
   echo "Generating ${SYSCONFDIR}/ssh_host_dsa_key"
   ssh-keygen -t dsa -f ${SYSCONFDIR}/ssh_host_dsa_key -N '' > /dev/null
 fi

 # Check if ssh_config exists. If yes, ask for overwriting

 if [ -f "${SYSCONFDIR}/ssh_config" ]
 then
   if request "Overwrite existing ${SYSCONFDIR}/ssh_config file?"
   then
     rm -f "${SYSCONFDIR}/ssh_config"
     if [ -f "${SYSCONFDIR}/ssh_config" ]
     then
       echo "Can't overwrite. ${SYSCONFDIR}/ssh_config is write protected."
     fi
   fi
 fi

 # Create default ssh_config from skeleton file in /etc/defaults/etc

 if [ ! -f "${SYSCONFDIR}/ssh_config" ]
 then
   echo "Generating ${SYSCONFDIR}/ssh_config file"
   cp ${SYSCONFDIR}/defaults/etc/ssh_config ${SYSCONFDIR}/ssh_config
   if [ "${port_number}" != "22" ]
   then
     echo "Host localhost" >> ${SYSCONFDIR}/ssh_config
     echo "    Port ${port_number}" >> ${SYSCONFDIR}/ssh_config
   fi
 fi

 # Check if sshd_config exists. If yes, ask for overwriting

 if [ -f "${SYSCONFDIR}/sshd_config" ]
 then
   if request "Overwrite existing ${SYSCONFDIR}/sshd_config file?"
   then
     rm -f "${SYSCONFDIR}/sshd_config"
     if [ -f "${SYSCONFDIR}/sshd_config" ]
     then
       echo "Can't overwrite. ${SYSCONFDIR}/sshd_config is write protected."
     fi
   else
     grep -q UsePrivilegeSeparation ${SYSCONFDIR}/sshd_config && privsep_configured=yes
   fi
 fi

 # Prior to creating or modifying sshd_config, care for privilege separation

 if [ "${privsep_configured}" != "yes" ]
 then
   if [ ${_nt} -gt 0 ]
   then
     echo "Privilege separation is set to yes by default since OpenSSH 3.3."
     echo "However, this requires a non-privileged account called 'sshd'."
     echo "For more info on privilege separation read /usr/share/doc/openssh/README.privsep."
     echo
     if request "Should privilege separation be used?"
     then
       privsep_used=yes
       grep -q '^sshd:' ${SYSCONFDIR}/passwd && sshd_in_passwd=yes
       net user sshd >/dev/null 2>&1 && sshd_in_sam=yes
       if [ "${sshd_in_passwd}" != "yes" ]
       then
 	if [ "${sshd_in_sam}" != "yes" ]
 	then
 	  echo "Warning: The following function requires administrator privileges!"
 	  if request "Should this script create a local user 'sshd' on this machine?"
 	  then
 	    dos_var_empty=`cygpath -w ${LOCALSTATEDIR}/empty`
 	    net user sshd /add /fullname:"sshd privsep" "/homedir:${dos_var_empty}" /active:no > /dev/null 2>&1 && sshd_in_sam=yes
 	    if [ "${sshd_in_sam}" != "yes" ]
 	    then
 	      echo "Warning: Creating the user 'sshd' failed!"
 	    fi
 	  fi
 	fi
 	if [ "${sshd_in_sam}" != "yes" ]
 	then
 	  echo "Warning: Can't create user 'sshd' in ${SYSCONFDIR}/passwd!"
 	  echo "         Privilege separation set to 'no' again!"
 	  echo "         Check your ${SYSCONFDIR}/sshd_config file!"
 	  privsep_used=no
 	else
 	  mkpasswd -l -u sshd | sed -e 's/bash$/false/' >> ${SYSCONFDIR}/passwd
 	fi
       fi
     else
       privsep_used=no
     fi
   else
     # On 9x don't use privilege separation.  Since security isn't
     # available it just adds useless additional processes.
     privsep_used=no
   fi
 fi

 # Create default sshd_config from skeleton files in /etc/defaults/etc or
 # modify to add the missing privsep configuration option

 if [ ! -f "${SYSCONFDIR}/sshd_config" ]
 then
   echo "Generating ${SYSCONFDIR}/sshd_config file"
   sed -e "s/^#UsePrivilegeSeparation yes/UsePrivilegeSeparation ${privsep_used}/
 	  s/^#Port 22/Port ${port_number}/
 	  s/^#StrictModes yes/StrictModes no/" \
       < ${SYSCONFDIR}/defaults/etc/sshd_config \
       > ${SYSCONFDIR}/sshd_config
 elif [ "${privsep_configured}" != "yes" ]
 then
   echo >> ${SYSCONFDIR}/sshd_config
   echo "UsePrivilegeSeparation ${privsep_used}" >> ${SYSCONFDIR}/sshd_config
 fi

 # Care for services file
 _my_etcdir="/ssh-host-config.$$"
 if [ ${_nt} -gt 0 ]
 then
   _win_etcdir="${SYSTEMROOT}\\system32\\drivers\\etc"
   _services="${_my_etcdir}/services"
   # On NT, 27 spaces, no space after the hash
   _spaces="                           #"
 else
   _win_etcdir="${WINDIR}"
   _services="${_my_etcdir}/SERVICES"
   # On 9x, 18 spaces (95 is very touchy), a space after the hash
   _spaces="                  # "
 fi
 _serv_tmp="${_my_etcdir}/srv.out.$$"

 mount -t -f "${_win_etcdir}" "${_my_etcdir}"

 # Depends on the above mount
 _wservices=`cygpath -w "${_services}"`

 # Remove sshd 22/port from services
 if [ `grep -q 'sshd[ \t][ \t]*22' "${_services}"; echo $?` -eq 0 ]
 then
   grep -v 'sshd[ \t][ \t]*22' "${_services}" > "${_serv_tmp}"
   if [ -f "${_serv_tmp}" ]
   then
     if mv "${_serv_tmp}" "${_services}"
     then
       echo "Removing sshd from ${_wservices}"
     else
       echo "Removing sshd from ${_wservices} failed!"
     fi
     rm -f "${_serv_tmp}"
   else
     echo "Removing sshd from ${_wservices} failed!"
   fi
 fi

 # Add ssh 22/tcp  and ssh 22/udp to services
 if [ `grep -q 'ssh[ \t][ \t]*22' "${_services}"; echo $?` -ne 0 ]
 then
   if awk '{ if ( $2 ~ /^23\/tcp/ ) print "ssh                22/tcp'"${_spaces}"'SSH Remote Login Protocol\nssh                22/udp'"${_spaces}"'SSH Remote Login Protocol"; print $0; }' < "${_services}" > "${_serv_tmp}"
   then
     if mv "${_serv_tmp}" "${_services}"
     then
       echo "Added ssh to ${_wservices}"
     else
       echo "Adding ssh to ${_wservices} failed!"
     fi
     rm -f "${_serv_tmp}"
   else
     echo "WARNING: Adding ssh to ${_wservices} failed!"
   fi
 fi

 umount "${_my_etcdir}"

 # Care for inetd.conf file
 _inetcnf="${SYSCONFDIR}/inetd.conf"
 _inetcnf_tmp="${SYSCONFDIR}/inetd.conf.$$"

 if [ -f "${_inetcnf}" ]
 then
   # Check if ssh service is already in use as sshd
   with_comment=1
   grep -q '^[ \t]*sshd' "${_inetcnf}" && with_comment=0
   # Remove sshd line from inetd.conf
   if [ `grep -q '^[# \t]*sshd' "${_inetcnf}"; echo $?` -eq 0 ]
   then
     grep -v '^[# \t]*sshd' "${_inetcnf}" >> "${_inetcnf_tmp}"
     if [ -f "${_inetcnf_tmp}" ]
     then
       if mv "${_inetcnf_tmp}" "${_inetcnf}"
       then
 	echo "Removed sshd from ${_inetcnf}"
       else
 	echo "Removing sshd from ${_inetcnf} failed!"
       fi
       rm -f "${_inetcnf_tmp}"
     else
       echo "Removing sshd from ${_inetcnf} failed!"
     fi
   fi

   # Add ssh line to inetd.conf
   if [ `grep -q '^[# \t]*ssh' "${_inetcnf}"; echo $?` -ne 0 ]
   then
     if [ "${with_comment}" -eq 0 ]
     then
       echo 'ssh  stream  tcp     nowait  root    /usr/sbin/sshd sshd -i' >> "${_inetcnf}"
     else
       echo '# ssh  stream  tcp     nowait  root    /usr/sbin/sshd sshd -i' >> "${_inetcnf}"
     fi
     echo "Added ssh to ${_inetcnf}"
   fi
 fi

 # On NT ask if sshd should be installed as service
 if [ ${_nt} -gt 0 ]
 then
   # But only if it is not already installed
   if ! cygrunsrv -Q sshd > /dev/null 2>&1
   then
     echo
     echo
     echo "Warning: The following functions require administrator privileges!"
     echo
     echo "Do you want to install sshd as service?"
     if request "(Say \"no\" if it's already installed as service)"
     then
       if [ $_nt2003 -gt 0 ]
       then
 	grep -q '^sshd_server:' ${SYSCONFDIR}/passwd && sshd_server_in_passwd=yes
 	if [ "${sshd_server_in_passwd}" = "yes" ]
 	then
 	  # Drop sshd_server from passwd since it could have wrong settings
 	  grep -v '^sshd_server:' ${SYSCONFDIR}/passwd > ${SYSCONFDIR}/passwd.$$
 	  rm -f ${SYSCONFDIR}/passwd
 	  mv ${SYSCONFDIR}/passwd.$$ ${SYSCONFDIR}/passwd
 	  chmod g-w,o-w ${SYSCONFDIR}/passwd
 	fi
 	net user sshd_server >/dev/null 2>&1 && sshd_server_in_sam=yes
 	if [ "${sshd_server_in_sam}" != "yes" ]
 	then
 	  echo
 	  echo "You appear to be running Windows 2003 Server or later.  On 2003 and"
 	  echo "later systems, it's not possible to use the LocalSystem account"
 	  echo "if sshd should allow passwordless logon (e. g. public key authentication)."
 	  echo "If you want to enable that functionality, it's required to create a new"
 	  echo "account 'sshd_server' with special privileges, which is then used to run"
 	  echo "the sshd service under."
 	  echo
 	  echo "Should this script create a new local account 'sshd_server' which has"
 	  if request "the required privileges?"
 	  then
 	    _admingroup=`awk -F: '{if ( $2 == "S-1-5-32-544" ) print $1;}' ${SYSCONFDIR}/group`
 	    if [ -z "${_admingroup}" ]
 	    then
 	      echo "There's no group with SID S-1-5-32-544 (Local administrators group) in"
 	      echo "your ${SYSCONFDIR}/group file.  Please regenerate this entry using 'mkgroup -l'"
 	      echo "and restart this script."
 	      exit 1
 	    fi
 	    dos_var_empty=`cygpath -w ${LOCALSTATEDIR}/empty`
 	    while [ "${sshd_server_in_sam}" != "yes" ]
 	    do
 	      if [ -n "${password_value}" ]
 	      then
 		_password="${password_value}"
 		# Allow to ask for password if first try fails
 		password_value=""
 	      else
 		echo
 		echo "Please enter a password for new user 'sshd_server'.  Please be sure that"
 		echo "this password matches the password rules given on your system."
 		echo -n "Entering no password will exit the configuration.  PASSWORD="
 		read -e _password
 		if [ -z "${_password}" ]
 		then
 		  echo
 		  echo "Exiting configuration.  No user sshd_server has been created,"
 		  echo "no sshd service installed."
 		  exit 1
 		fi
 	      fi
 	      net user sshd_server "${_password}" /add /fullname:"sshd server account" "/homedir:${dos_var_empty}" /yes > /tmp/nu.$$ 2>&1 && sshd_server_in_sam=yes
 	      if [ "${sshd_server_in_sam}" != "yes" ]
 	      then
 		echo "Creating the user 'sshd_server' failed!  Reason:"
 		cat /tmp/nu.$$
 		rm /tmp/nu.$$
 	      fi
 	    done
 	    net localgroup "${_admingroup}" sshd_server /add > /dev/null 2>&1 && sshd_server_in_admingroup=yes
 	    if [ "${sshd_server_in_admingroup}" != "yes" ]
 	    then
 	      echo "WARNING: Adding user sshd_server to local group ${_admingroup} failed!"
 	      echo "Please add sshd_server to local group ${_admingroup} before"
 	      echo "starting the sshd service!"
 	      echo
 	    fi
 	    passwd_has_expiry_flags=`passwd -v | awk '/^passwd /{print ( $3 >= 1.5 ) ? "yes" : "no";}'`
 	    if [ "${passwd_has_expiry_flags}" != "yes" ]
 	    then
 	      echo
 	      echo "WARNING: User sshd_server has password expiry set to system default."
 	      echo "Please check that password never expires or set it to your needs."
 	    elif ! passwd -e sshd_server
 	    then
 	      echo
 	      echo "WARNING: Setting password expiry for user sshd_server failed!"
 	      echo "Please check that password never expires or set it to your needs."
 	    fi
 	    editrights -a SeAssignPrimaryTokenPrivilege -u sshd_server &&
 	    editrights -a SeCreateTokenPrivilege -u sshd_server &&
 	    editrights -a SeDenyInteractiveLogonRight -u sshd_server &&
 	    editrights -a SeDenyNetworkLogonRight -u sshd_server &&
 	    editrights -a SeDenyRemoteInteractiveLogonRight -u sshd_server &&
 	    editrights -a SeIncreaseQuotaPrivilege -u sshd_server &&
 	    editrights -a SeServiceLogonRight -u sshd_server &&
 	    sshd_server_got_all_rights="yes"
 	    if [ "${sshd_server_got_all_rights}" != "yes" ]
 	    then
 	      echo
 	      echo "Assigning the appropriate privileges to user 'sshd_server' failed!"
 	      echo "Can't create sshd service!"
 	      exit 1
 	    fi
 	    echo
 	    echo "User 'sshd_server' has been created with password '${_password}'."
 	    echo "If you change the password, please keep in mind to change the password"
 	    echo "for the sshd service, too."
 	    echo
 	    echo "Also keep in mind that the user sshd_server needs read permissions on all"
 	    echo "users' .ssh/authorized_keys file to allow public key authentication for"
 	    echo "these users!.  (Re-)running ssh-user-config for each user will set the"
 	    echo "required permissions correctly."
 	    echo
 	  fi
 	fi
 	if [ "${sshd_server_in_sam}" = "yes" ]
 	then
 	  mkpasswd -l -u sshd_server | sed -e 's/bash$/false/' >> ${SYSCONFDIR}/passwd
 	fi
       fi
       if [ -n "${cygwin_value}" ]
       then
 	_cygwin="${cygwin_value}"
       else
 	echo
 	echo "Which value should the environment variable CYGWIN have when"
 	echo "sshd starts? It's recommended to set at least \"ntsec\" to be"
 	echo "able to change user context without password."
 	echo -n "Default is \"ntsec\".  CYGWIN="
 	read -e _cygwin
       fi
       [ -z "${_cygwin}" ] && _cygwin="ntsec"
       if [ $_nt2003 -gt 0 -a "${sshd_server_in_sam}" = "yes" ]
       then
 	if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a -D -u sshd_server -w "${_password}" -e "CYGWIN=${_cygwin}"
 	then
 	  echo
 	  echo "The service has been installed under sshd_server account."
 	  echo "To start the service, call \`net start sshd' or \`cygrunsrv -S sshd'."
 	fi
       else
 	if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a -D -e "CYGWIN=${_cygwin}"
 	then
 	  echo
 	  echo "The service has been installed under LocalSystem account."
 	  echo "To start the service, call \`net start sshd' or \`cygrunsrv -S sshd'."
 	fi
       fi
     fi
     # Now check if sshd has been successfully installed.  This allows to
     # set the ownership of the affected files correctly.
     if cygrunsrv -Q sshd > /dev/null 2>&1
     then
       if [ $_nt2003 -gt 0 -a "${sshd_server_in_sam}" = "yes" ]
       then
 	_user="sshd_server"
       else
 	_user="system"
       fi
       chown "${_user}" ${SYSCONFDIR}/ssh*
       chown "${_user}".544 ${LOCALSTATEDIR}/empty
       if [ -f ${LOCALSTATEDIR}/log/sshd.log ]
       then
 	chown "${_user}".544 ${LOCALSTATEDIR}/log/sshd.log
       fi
     fi
   fi
 fi

 echo
 echo "Host configuration finished. Have fun!"
	#!/bin/bash
	#
	# ssh-host-config, Copyright 2000, 2001, 2002, 2003 Red Hat Inc.
	#
	# This file is part of the Cygwin port of OpenSSH.

	# Subdirectory where the new package is being installed
	PREFIX=/usr

	# Directory where the config files are stored
	SYSCONFDIR=/etc
	LOCALSTATEDIR=/var

	progname=$0
	auto_answer=""
	port_number=22

	privsep_configured=no
	privsep_used=yes
	sshd_in_passwd=no
	sshd_in_sam=no

	request()
	{
	if [ "${auto_answer}" = "yes" ]
	then
	echo "$1 (yes/no) yes"
	return 0
	elif [ "${auto_answer}" = "no" ]
	then
	echo "$1 (yes/no) no"
	return 1
	fi

	answer=""
	while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
	do
	echo -n "$1 (yes/no) "
	read -e answer
	done
	if [ "X${answer}" = "Xyes" ]
	then
	return 0
	else
	return 1
	fi
	}

	# Check options

	while :
	do
	case $# in
	0)
	break
	;;
	esac

	option=$1
	shift

	case "${option}" in
	-d \| --debug )
	set -x
	;;

	-y \| --yes )
	auto_answer=yes
	;;

	-n \| --no )
	auto_answer=no
	;;

	-c \| --cygwin )
	cygwin_value="$1"
	shift
	;;

	-p \| --port )
	port_number=$1
	shift
	;;

	-w \| --pwd )
	password_value="$1"
	shift
	;;

	*)
	echo "usage: ${progname} [OPTION]..."
	echo
	echo "This script creates an OpenSSH host configuration."
	echo
	echo "Options:"
	echo " --debug -d Enable shell's debug output."
	echo " --yes -y Answer all questions with \"yes\" automatically."
	echo " --no -n Answer all questions with \"no\" automatically."
	echo " --cygwin -c <options> Use \"options\" as value for CYGWIN environment var."
	echo " --port -p <n> sshd listens on port n."
	echo " --pwd -w <passwd> Use \"pwd\" as password for user 'sshd_server'."
	echo
	exit 1
	;;

	esac
	done

	# Check if running on NT
	_sys="`uname`"
	_nt=`expr "${_sys}" : "CYGWIN_NT"`
	# If running on NT, check if running under 2003 Server or later
	if [ ${_nt} -gt 0 ]
	then
	_nt2003=`uname \| awk -F- '{print ( $2 >= 5.2 ) ? 1 : 0;}'`
	fi

	# Check for running ssh/sshd processes first. Refuse to do anything while
	# some ssh processes are still running

	if ps -ef \| grep -v grep \| grep -q ssh
	then
	echo
	echo "There are still ssh processes running. Please shut them down first."
	echo
	exit 1
	fi

	# Check for ${SYSCONFDIR} directory

	if [ -e "${SYSCONFDIR}" -a ! -d "${SYSCONFDIR}" ]
	then
	echo
	echo "${SYSCONFDIR} is existant but not a directory."
	echo "Cannot create global configuration files."
	echo
	exit 1
	fi

	# Create it if necessary

	if [ ! -e "${SYSCONFDIR}" ]
	then
	mkdir "${SYSCONFDIR}"
	if [ ! -e "${SYSCONFDIR}" ]
	then
	echo
	echo "Creating ${SYSCONFDIR} directory failed"
	echo
	exit 1
	fi
	fi

	# Create /var/log and /var/log/lastlog if not already existing

	if [ -f ${LOCALSTATEDIR}/log ]
	then
	echo "Creating ${LOCALSTATEDIR}/log failed!"
	else
	if [ ! -d ${LOCALSTATEDIR}/log ]
	then
	mkdir -p ${LOCALSTATEDIR}/log
	fi
	if [ -d ${LOCALSTATEDIR}/log/lastlog ]
	then
	chmod 777 ${LOCALSTATEDIR}/log/lastlog
	elif [ ! -f ${LOCALSTATEDIR}/log/lastlog ]
	then
	cat /dev/null > ${LOCALSTATEDIR}/log/lastlog
	chmod 666 ${LOCALSTATEDIR}/log/lastlog
	fi
	fi

	# Create /var/empty file used as chroot jail for privilege separation
	if [ -f ${LOCALSTATEDIR}/empty ]
	then
	echo "Creating ${LOCALSTATEDIR}/empty failed!"
	else
	mkdir -p ${LOCALSTATEDIR}/empty
	if [ ${_nt} -gt 0 ]
	then
	chmod 755 ${LOCALSTATEDIR}/empty
	fi
	fi

	# First generate host keys if not already existing

	if [ ! -f "${SYSCONFDIR}/ssh_host_key" ]
	then
	echo "Generating ${SYSCONFDIR}/ssh_host_key"
	ssh-keygen -t rsa1 -f ${SYSCONFDIR}/ssh_host_key -N '' > /dev/null
	fi

	if [ ! -f "${SYSCONFDIR}/ssh_host_rsa_key" ]
	then
	echo "Generating ${SYSCONFDIR}/ssh_host_rsa_key"
	ssh-keygen -t rsa -f ${SYSCONFDIR}/ssh_host_rsa_key -N '' > /dev/null
	fi

	if [ ! -f "${SYSCONFDIR}/ssh_host_dsa_key" ]
	then
	echo "Generating ${SYSCONFDIR}/ssh_host_dsa_key"
	ssh-keygen -t dsa -f ${SYSCONFDIR}/ssh_host_dsa_key -N '' > /dev/null
	fi

	# Check if ssh_config exists. If yes, ask for overwriting

	if [ -f "${SYSCONFDIR}/ssh_config" ]
	then
	if request "Overwrite existing ${SYSCONFDIR}/ssh_config file?"
	then
	rm -f "${SYSCONFDIR}/ssh_config"
	if [ -f "${SYSCONFDIR}/ssh_config" ]
	then
	echo "Can't overwrite. ${SYSCONFDIR}/ssh_config is write protected."
	fi
	fi
	fi

	# Create default ssh_config from skeleton file in /etc/defaults/etc

	if [ ! -f "${SYSCONFDIR}/ssh_config" ]
	then
	echo "Generating ${SYSCONFDIR}/ssh_config file"
	cp ${SYSCONFDIR}/defaults/etc/ssh_config ${SYSCONFDIR}/ssh_config
	if [ "${port_number}" != "22" ]
	then
	echo "Host localhost" >> ${SYSCONFDIR}/ssh_config
	echo " Port ${port_number}" >> ${SYSCONFDIR}/ssh_config
	fi
	fi

	# Check if sshd_config exists. If yes, ask for overwriting

	if [ -f "${SYSCONFDIR}/sshd_config" ]
	then
	if request "Overwrite existing ${SYSCONFDIR}/sshd_config file?"
	then
	rm -f "${SYSCONFDIR}/sshd_config"
	if [ -f "${SYSCONFDIR}/sshd_config" ]
	then
	echo "Can't overwrite. ${SYSCONFDIR}/sshd_config is write protected."
	fi
	else
	grep -q UsePrivilegeSeparation ${SYSCONFDIR}/sshd_config && privsep_configured=yes
	fi
	fi

	# Prior to creating or modifying sshd_config, care for privilege separation

	if [ "${privsep_configured}" != "yes" ]
	then
	if [ ${_nt} -gt 0 ]
	then
	echo "Privilege separation is set to yes by default since OpenSSH 3.3."
	echo "However, this requires a non-privileged account called 'sshd'."
	echo "For more info on privilege separation read /usr/share/doc/openssh/README.privsep."
	echo
	if request "Should privilege separation be used?"
	then
	privsep_used=yes
	grep -q '^sshd:' ${SYSCONFDIR}/passwd && sshd_in_passwd=yes
	net user sshd >/dev/null 2>&1 && sshd_in_sam=yes
	if [ "${sshd_in_passwd}" != "yes" ]
	then
	if [ "${sshd_in_sam}" != "yes" ]
	then
	echo "Warning: The following function requires administrator privileges!"
	if request "Should this script create a local user 'sshd' on this machine?"
	then
	dos_var_empty=`cygpath -w ${LOCALSTATEDIR}/empty`
	net user sshd /add /fullname:"sshd privsep" "/homedir:${dos_var_empty}" /active:no > /dev/null 2>&1 && sshd_in_sam=yes
	if [ "${sshd_in_sam}" != "yes" ]
	then
	echo "Warning: Creating the user 'sshd' failed!"
	fi
	fi
	fi
	if [ "${sshd_in_sam}" != "yes" ]
	then
	echo "Warning: Can't create user 'sshd' in ${SYSCONFDIR}/passwd!"
	echo " Privilege separation set to 'no' again!"
	echo " Check your ${SYSCONFDIR}/sshd_config file!"
	privsep_used=no
	else
	mkpasswd -l -u sshd \| sed -e 's/bash$/false/' >> ${SYSCONFDIR}/passwd
	fi
	fi
	else
	privsep_used=no
	fi
	else
	# On 9x don't use privilege separation. Since security isn't
	# available it just adds useless additional processes.
	privsep_used=no
	fi
	fi

	# Create default sshd_config from skeleton files in /etc/defaults/etc or
	# modify to add the missing privsep configuration option

	if [ ! -f "${SYSCONFDIR}/sshd_config" ]
	then
	echo "Generating ${SYSCONFDIR}/sshd_config file"
	sed -e "s/^#UsePrivilegeSeparation yes/UsePrivilegeSeparation ${privsep_used}/
	s/^#Port 22/Port ${port_number}/
	s/^#StrictModes yes/StrictModes no/" \
	< ${SYSCONFDIR}/defaults/etc/sshd_config \
	> ${SYSCONFDIR}/sshd_config
	elif [ "${privsep_configured}" != "yes" ]
	then
	echo >> ${SYSCONFDIR}/sshd_config
	echo "UsePrivilegeSeparation ${privsep_used}" >> ${SYSCONFDIR}/sshd_config
	fi

	# Care for services file
	_my_etcdir="/ssh-host-config.$$"
	if [ ${_nt} -gt 0 ]
	then
	_win_etcdir="${SYSTEMROOT}\\system32\\drivers\\etc"
	_services="${_my_etcdir}/services"
	# On NT, 27 spaces, no space after the hash
	_spaces=" #"
	else
	_win_etcdir="${WINDIR}"
	_services="${_my_etcdir}/SERVICES"
	# On 9x, 18 spaces (95 is very touchy), a space after the hash
	_spaces=" # "
	fi
	_serv_tmp="${_my_etcdir}/srv.out.$$"

	mount -t -f "${_win_etcdir}" "${_my_etcdir}"

	# Depends on the above mount
	_wservices=`cygpath -w "${_services}"`

	# Remove sshd 22/port from services
	if [ `grep -q 'sshd[ \t][ \t]*22' "${_services}"; echo $?` -eq 0 ]
	then
	grep -v 'sshd[ \t][ \t]*22' "${_services}" > "${_serv_tmp}"
	if [ -f "${_serv_tmp}" ]
	then
	if mv "${_serv_tmp}" "${_services}"
	then
	echo "Removing sshd from ${_wservices}"
	else
	echo "Removing sshd from ${_wservices} failed!"
	fi
	rm -f "${_serv_tmp}"
	else
	echo "Removing sshd from ${_wservices} failed!"
	fi
	fi

	# Add ssh 22/tcp and ssh 22/udp to services
	if [ `grep -q 'ssh[ \t][ \t]*22' "${_services}"; echo $?` -ne 0 ]
	then
	if awk '{ if ( $2 ~ /^23\/tcp/ ) print "ssh 22/tcp'"${_spaces}"'SSH Remote Login Protocol\nssh 22/udp'"${_spaces}"'SSH Remote Login Protocol"; print $0; }' < "${_services}" > "${_serv_tmp}"
	then
	if mv "${_serv_tmp}" "${_services}"
	then
	echo "Added ssh to ${_wservices}"
	else
	echo "Adding ssh to ${_wservices} failed!"
	fi
	rm -f "${_serv_tmp}"
	else
	echo "WARNING: Adding ssh to ${_wservices} failed!"
	fi
	fi

	umount "${_my_etcdir}"

	# Care for inetd.conf file
	_inetcnf="${SYSCONFDIR}/inetd.conf"
	_inetcnf_tmp="${SYSCONFDIR}/inetd.conf.$$"

	if [ -f "${_inetcnf}" ]
	then
	# Check if ssh service is already in use as sshd
	with_comment=1
	grep -q '^[ \t]*sshd' "${_inetcnf}" && with_comment=0
	# Remove sshd line from inetd.conf
	if [ `grep -q '^[# \t]*sshd' "${_inetcnf}"; echo $?` -eq 0 ]
	then
	grep -v '^[# \t]*sshd' "${_inetcnf}" >> "${_inetcnf_tmp}"
	if [ -f "${_inetcnf_tmp}" ]
	then
	if mv "${_inetcnf_tmp}" "${_inetcnf}"
	then
	echo "Removed sshd from ${_inetcnf}"
	else
	echo "Removing sshd from ${_inetcnf} failed!"
	fi
	rm -f "${_inetcnf_tmp}"
	else
	echo "Removing sshd from ${_inetcnf} failed!"
	fi
	fi

	# Add ssh line to inetd.conf
	if [ `grep -q '^[# \t]*ssh' "${_inetcnf}"; echo $?` -ne 0 ]
	then
	if [ "${with_comment}" -eq 0 ]
	then
	echo 'ssh stream tcp nowait root /usr/sbin/sshd sshd -i' >> "${_inetcnf}"
	else
	echo '# ssh stream tcp nowait root /usr/sbin/sshd sshd -i' >> "${_inetcnf}"
	fi
	echo "Added ssh to ${_inetcnf}"
	fi
	fi

	# On NT ask if sshd should be installed as service
	if [ ${_nt} -gt 0 ]
	then
	# But only if it is not already installed
	if ! cygrunsrv -Q sshd > /dev/null 2>&1
	then
	echo
	echo
	echo "Warning: The following functions require administrator privileges!"
	echo
	echo "Do you want to install sshd as service?"
	if request "(Say \"no\" if it's already installed as service)"
	then
	if [ $_nt2003 -gt 0 ]
	then
	grep -q '^sshd_server:' ${SYSCONFDIR}/passwd && sshd_server_in_passwd=yes
	if [ "${sshd_server_in_passwd}" = "yes" ]
	then
	# Drop sshd_server from passwd since it could have wrong settings
	grep -v '^sshd_server:' ${SYSCONFDIR}/passwd > ${SYSCONFDIR}/passwd.$$
	rm -f ${SYSCONFDIR}/passwd
	mv ${SYSCONFDIR}/passwd.$$ ${SYSCONFDIR}/passwd
	chmod g-w,o-w ${SYSCONFDIR}/passwd
	fi
	net user sshd_server >/dev/null 2>&1 && sshd_server_in_sam=yes
	if [ "${sshd_server_in_sam}" != "yes" ]
	then
	echo
	echo "You appear to be running Windows 2003 Server or later. On 2003 and"
	echo "later systems, it's not possible to use the LocalSystem account"
	echo "if sshd should allow passwordless logon (e. g. public key authentication)."
	echo "If you want to enable that functionality, it's required to create a new"
	echo "account 'sshd_server' with special privileges, which is then used to run"
	echo "the sshd service under."
	echo
	echo "Should this script create a new local account 'sshd_server' which has"
	if request "the required privileges?"
	then
	_admingroup=`awk -F: '{if ( $2 == "S-1-5-32-544" ) print $1;}' ${SYSCONFDIR}/group`
	if [ -z "${_admingroup}" ]
	then
	echo "There's no group with SID S-1-5-32-544 (Local administrators group) in"
	echo "your ${SYSCONFDIR}/group file. Please regenerate this entry using 'mkgroup -l'"
	echo "and restart this script."
	exit 1
	fi
	dos_var_empty=`cygpath -w ${LOCALSTATEDIR}/empty`
	while [ "${sshd_server_in_sam}" != "yes" ]
	do
	if [ -n "${password_value}" ]
	then
	_password="${password_value}"
	# Allow to ask for password if first try fails
	password_value=""
	else
	echo
	echo "Please enter a password for new user 'sshd_server'. Please be sure that"
	echo "this password matches the password rules given on your system."
	echo -n "Entering no password will exit the configuration. PASSWORD="
	read -e _password
	if [ -z "${_password}" ]
	then
	echo
	echo "Exiting configuration. No user sshd_server has been created,"
	echo "no sshd service installed."
	exit 1
	fi
	fi
	net user sshd_server "${_password}" /add /fullname:"sshd server account" "/homedir:${dos_var_empty}" /yes > /tmp/nu.$$ 2>&1 && sshd_server_in_sam=yes
	if [ "${sshd_server_in_sam}" != "yes" ]
	then
	echo "Creating the user 'sshd_server' failed! Reason:"
	cat /tmp/nu.$$
	rm /tmp/nu.$$
	fi
	done
	net localgroup "${_admingroup}" sshd_server /add > /dev/null 2>&1 && sshd_server_in_admingroup=yes
	if [ "${sshd_server_in_admingroup}" != "yes" ]
	then
	echo "WARNING: Adding user sshd_server to local group ${_admingroup} failed!"
	echo "Please add sshd_server to local group ${_admingroup} before"
	echo "starting the sshd service!"
	echo
	fi
	passwd_has_expiry_flags=`passwd -v \| awk '/^passwd /{print ( $3 >= 1.5 ) ? "yes" : "no";}'`
	if [ "${passwd_has_expiry_flags}" != "yes" ]
	then
	echo
	echo "WARNING: User sshd_server has password expiry set to system default."
	echo "Please check that password never expires or set it to your needs."
	elif ! passwd -e sshd_server
	then
	echo
	echo "WARNING: Setting password expiry for user sshd_server failed!"
	echo "Please check that password never expires or set it to your needs."
	fi
	editrights -a SeAssignPrimaryTokenPrivilege -u sshd_server &&
	editrights -a SeCreateTokenPrivilege -u sshd_server &&
	editrights -a SeDenyInteractiveLogonRight -u sshd_server &&
	editrights -a SeDenyNetworkLogonRight -u sshd_server &&
	editrights -a SeDenyRemoteInteractiveLogonRight -u sshd_server &&
	editrights -a SeIncreaseQuotaPrivilege -u sshd_server &&
	editrights -a SeServiceLogonRight -u sshd_server &&
	sshd_server_got_all_rights="yes"
	if [ "${sshd_server_got_all_rights}" != "yes" ]
	then
	echo
	echo "Assigning the appropriate privileges to user 'sshd_server' failed!"
	echo "Can't create sshd service!"
	exit 1
	fi
	echo
	echo "User 'sshd_server' has been created with password '${_password}'."
	echo "If you change the password, please keep in mind to change the password"
	echo "for the sshd service, too."
	echo
	echo "Also keep in mind that the user sshd_server needs read permissions on all"
	echo "users' .ssh/authorized_keys file to allow public key authentication for"
	echo "these users!. (Re-)running ssh-user-config for each user will set the"
	echo "required permissions correctly."
	echo
	fi
	fi
	if [ "${sshd_server_in_sam}" = "yes" ]
	then
	mkpasswd -l -u sshd_server \| sed -e 's/bash$/false/' >> ${SYSCONFDIR}/passwd
	fi
	fi
	if [ -n "${cygwin_value}" ]
	then
	_cygwin="${cygwin_value}"
	else
	echo
	echo "Which value should the environment variable CYGWIN have when"
	echo "sshd starts? It's recommended to set at least \"ntsec\" to be"
	echo "able to change user context without password."
	echo -n "Default is \"ntsec\". CYGWIN="
	read -e _cygwin
	fi
	[ -z "${_cygwin}" ] && _cygwin="ntsec"
	if [ $_nt2003 -gt 0 -a "${sshd_server_in_sam}" = "yes" ]
	then
	if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a -D -u sshd_server -w "${_password}" -e "CYGWIN=${_cygwin}"
	then
	echo
	echo "The service has been installed under sshd_server account."
	echo "To start the service, call \`net start sshd' or \`cygrunsrv -S sshd'."
	fi
	else
	if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a -D -e "CYGWIN=${_cygwin}"
	then
	echo
	echo "The service has been installed under LocalSystem account."
	echo "To start the service, call \`net start sshd' or \`cygrunsrv -S sshd'."
	fi
	fi
	fi
	# Now check if sshd has been successfully installed. This allows to
	# set the ownership of the affected files correctly.
	if cygrunsrv -Q sshd > /dev/null 2>&1
	then
	if [ $_nt2003 -gt 0 -a "${sshd_server_in_sam}" = "yes" ]
	then
	_user="sshd_server"
	else
	_user="system"
	fi
	chown "${_user}" ${SYSCONFDIR}/ssh*
	chown "${_user}".544 ${LOCALSTATEDIR}/empty
	if [ -f ${LOCALSTATEDIR}/log/sshd.log ]
	then
	chown "${_user}".544 ${LOCALSTATEDIR}/log/sshd.log
	fi
	fi
	fi
	fi

	echo
	echo "Host configuration finished. Have fun!"