- (djm) [contrib/cygwin/Makefile contrib/cygwin/ssh-host-config]

   [contrib/cygwin/ssh-user-config contrib/cygwin/sshd-inetd]
   Revamped and simplified Cygwin ssh-host-config script that uses
   unified csih configuration tool. Requires recent Cygwin.
   Patch from vinschen AT redhat.com

4 files changed, 656 insertions, 680 deletions

diff --git a/contrib/cygwin/Makefile b/contrib/cygwin/Makefile
index 5176ba003..3e2d26404 100644
--- a/contrib/cygwin/Makefile
+++ b/contrib/cygwin/Makefile
@@ -8,6 +8,7 @@ sshdocdir=$(docdir)/openssh
 cygdocdir=$(docdir)/Cygwin
 sysconfdir=/etc
 defaultsdir=$(sysconfdir)/defaults/etc
+inetdefdir=$(defaultsdir)/inetd.d
 PRIVSEP_PATH=/var/empty
 INSTALL=/usr/bin/install -c
 
@@ -27,6 +28,10 @@ move-config-files: $(DESTDIR)$(sysconfdir)/ssh_config $(DESTDIR)$(sysconfdir)/ss
 remove-empty-dir:
         rm -rf $(DESTDIR)$(PRIVSEP_PATH)
 
+install-inetd-config:
+        $(srcdir)/mkinstalldirs $(DESTDIR)$(inetdefdir)
+        $(INSTALL) -m 644 sshd-inetd  $(DESTDIR)$(inetdefdir)/sshd-inetd
+
 install-sshdoc:
         $(srcdir)/mkinstalldirs $(DESTDIR)$(sshdocdir)
         $(INSTALL) -m 644 $(srcdir)/CREDITS $(DESTDIR)$(sshdocdir)/CREDITS
@@ -37,6 +42,7 @@ install-sshdoc:
         $(INSTALL) -m 644 $(srcdir)/README.dns $(DESTDIR)$(sshdocdir)/README.dns
         $(INSTALL) -m 644 $(srcdir)/README.privsep $(DESTDIR)$(sshdocdir)/README.privsep
         $(INSTALL) -m 644 $(srcdir)/README.smartcard $(DESTDIR)$(sshdocdir)/README.smartcard
+        $(INSTALL) -m 644 $(srcdir)/RFC.nroff $(DESTDIR)$(sshdocdir)/RFC.nroff
         $(INSTALL) -m 644 $(srcdir)/TODO $(DESTDIR)$(sshdocdir)/TODO
         $(INSTALL) -m 644 $(srcdir)/WARNING.RNG $(DESTDIR)$(sshdocdir)/WARNING.RNG
 
@@ -51,5 +57,5 @@ install-scripts: ssh-host-config ssh-user-config
         $(INSTALL) -m 755 ssh-host-config $(DESTDIR)$(bindir)/ssh-host-config
         $(INSTALL) -m 755 ssh-user-config $(DESTDIR)$(bindir)/ssh-user-config
 
-cygwin-postinstall: move-config-files remove-empty-dir install-doc install-scripts
+cygwin-postinstall: move-config-files remove-empty-dir install-inetd-config install-doc install-scripts
         @echo "Cygwin specific configuration finished."
diff --git a/contrib/cygwin/ssh-host-config b/contrib/cygwin/ssh-host-config
index f90af8d2a..bbb6da4c4 100644
--- a/contrib/cygwin/ssh-host-config
+++ b/contrib/cygwin/ssh-host-config
@@ -4,6 +4,15 @@
 #
 # This file is part of the Cygwin port of OpenSSH.
 
+# ======================================================================
+# Initialization
+# ======================================================================
+PROGNAME=$(basename $0)
+_tdir=$(dirname $0)
+PROGDIR=$(cd $_tdir && pwd)
+
+CSIH_SCRIPT=/usr/share/csih/cygwin-service-installation-helper.sh
+
 # Subdirectory where the new package is being installed
 PREFIX=/usr
 
@@ -11,43 +20,371 @@ PREFIX=/usr
 SYSCONFDIR=/etc
 LOCALSTATEDIR=/var
 
-progname=$0
-auto_answer=""
-port_number=22
+source ${CSIH_SCRIPT}
 
+port_number=22
 privsep_configured=no
 privsep_used=yes
-sshd_in_passwd=no
-sshd_in_sam=no
+cygwin_value="ntsec"
+password_value=
+
+# ======================================================================
+# Routine: create_host_keys
+# ======================================================================
+create_host_keys() {
+  if [ ! -f "${SYSCONFDIR}/ssh_host_key" ]
+  then
+    csih_inform "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
+    csih_inform "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
+    csih_inform "Generating ${SYSCONFDIR}/ssh_host_dsa_key"
+    ssh-keygen -t dsa -f ${SYSCONFDIR}/ssh_host_dsa_key -N '' > /dev/null
+  fi
+} # --- End of create_host_keys --- #
+
+# ======================================================================
+# Routine: update_services_file
+# ======================================================================
+update_services_file() {
+  local _my_etcdir="/ssh-host-config.$$"
+  local _win_etcdir
+  local _services
+  local _spaces
+  local _serv_tmp
+  local _wservices
+
+  if csih_is_nt
+  then
+    _win_etcdir="${SYSTEMROOT}\\system32\\drivers\\etc"
+    _services="${_my_etcdir}/services"
+    # On NT, 27 spaces, no space after the hash
+    _spaces="                           #"
+  else
+    _win_etcdir="${WINDIR}"
+    _services="${_my_etcdir}/SERVICES"
+    # On 9x, 18 spaces (95 is very touchy), a space after the hash
+    _spaces="                  # "
+  fi
+  _serv_tmp="${_my_etcdir}/srv.out.$$"
+  
+  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
+        csih_inform "Removing sshd from ${_wservices}"
+      else
+        csih_warning "Removing sshd from ${_wservices} failed!"
+      fi
+      rm -f "${_serv_tmp}"
+    else
+      csih_warning "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
+        csih_inform "Added ssh to ${_wservices}"
+      else
+        csih_warning "Adding ssh to ${_wservices} failed!"
+      fi
+      rm -f "${_serv_tmp}"
+    else
+      csih_warning "Adding ssh to ${_wservices} failed!"
+    fi
+  fi
+  umount "${_my_etcdir}"
+} # --- End of update_services_file --- #
 
-request()
-{
-  if [ "${auto_answer}" = "yes" ]
+# ======================================================================
+# Routine: sshd_privsep
+#  MODIFIES: privsep_configured  privsep_used
+# ======================================================================
+sshd_privsep() {
+  local sshdconfig_tmp
+
+  if [ "${privsep_configured}" != "yes" ]
+  then
+    if csih_is_nt
+    then
+      csih_inform "Privilege separation is set to yes by default since OpenSSH 3.3."
+      csih_inform "However, this requires a non-privileged account called 'sshd'."
+      csih_inform "For more info on privilege separation read /usr/share/doc/openssh/README.privsep."
+      if csih_request "Should privilege separation be used?"
+      then
+        privsep_used=yes
+        if ! csih_create_unprivileged_user sshd
+        then
+          csih_warning "Couldn't create user 'sshd'!"
+          csih_warning "Privilege separation set to 'no' again!"
+          csih_warning "Check your ${SYSCONFDIR}/sshd_config file!"
+          privsep_used=no
+        fi
+      else
+        privsep_used=no
+      fi
+    else
+      # On 9x don't use privilege separation.  Since security isn't
+      # available it just adds useless additional processes.
+      privsep_used=no
+    fi
+  fi
+  
+  # Create default sshd_config from skeleton files in /etc/defaults/etc or
+  # modify to add the missing privsep configuration option
+  if cmp "${SYSCONFDIR}/sshd_config" "${SYSCONFDIR}/defaults/${SYSCONFDIR}/sshd_config" >/dev/null 2>&1
   then
-    echo "$1 (yes/no) yes"
-    return 0
-  elif [ "${auto_answer}" = "no" ]
+    csih_inform "Updating ${SYSCONFDIR}/sshd_config file"
+    sshdconfig_tmp=${SYSCONFDIR}/sshd_config.$$
+    sed -e "s/^#UsePrivilegeSeparation yes/UsePrivilegeSeparation ${privsep_used}/
+          s/^#Port 22/Port ${port_number}/
+          s/^#StrictModes yes/StrictModes no/" \
+        < ${SYSCONFDIR}/sshd_config \
+        > "${sshdconfig_tmp}"
+    mv "${sshdconfig_tmp}" ${SYSCONFDIR}/sshd_config
+  elif [ "${privsep_configured}" != "yes" ]
   then
-    echo "$1 (yes/no) no"
-    return 1
+    echo >> ${SYSCONFDIR}/sshd_config
+    echo "UsePrivilegeSeparation ${privsep_used}" >> ${SYSCONFDIR}/sshd_config
   fi
+} # --- End of sshd_privsep --- #
+
+# ======================================================================
+# Routine: update_inetd_conf
+# ======================================================================
+update_inetd_conf() {
+  local _inetcnf="${SYSCONFDIR}/inetd.conf"
+  local _inetcnf_tmp="${SYSCONFDIR}/inetd.conf.$$"
+  local _inetcnf_dir="${SYSCONFDIR}/inetd.d"
+  local _sshd_inetd_conf="${_inetcnf_dir}/sshd-inetd"
+  local _sshd_inetd_conf_tmp="${_inetcnf_dir}/sshd-inetd.$$"
+  local _with_comment=1
+
+  if [ -d "${_inetcnf_dir}" ]
+  then
+    # we have inetutils-1.5 inetd.d support
+    if [ -f "${_inetcnf}" ]
+    then
+      grep -q '^[ \t]*ssh' "${_inetcnf}" && _with_comment=0
+
+      # check for sshd OR ssh in top-level inetd.conf file, and remove
+      # will be replaced by a file in inetd.d/
+      if [ `grep -q '^[# \t]*ssh' "${_inetcnf}"; echo $?` -eq 0 ]
+      then
+        grep -v '^[# \t]*ssh' "${_inetcnf}" >> "${_inetcnf_tmp}"
+        if [ -f "${_inetcnf_tmp}" ]
+        then
+          if mv "${_inetcnf_tmp}" "${_inetcnf}"
+          then
+            csih_inform "Removed ssh[d] from ${_inetcnf}"
+          else
+            csih_warning "Removing ssh[d] from ${_inetcnf} failed!"
+          fi
+          rm -f "${_inetcnf_tmp}"
+        else
+          csih_warning "Removing ssh[d] from ${_inetcnf} failed!"
+        fi
+      fi
+    fi
+
+    csih_install_config "${_sshd_inetd_conf}"   "${SYSCONFDIR}/defaults"
+    if cmp "${SYSCONFDIR}/defaults${_sshd_inetd_conf}" "${_sshd_inetd_conf}" >/dev/null 2>&1
+    then
+      if [ "${_with_comment}" -eq 0 ]
+      then
+        sed -e 's/@COMMENT@[ \t]*//' < "${_sshd_inetd_conf}" > "${_sshd_inetd_conf_tmp}"
+      else
+        sed -e 's/@COMMENT@[ \t]*/# /' < "${_sshd_inetd_conf}" > "${_sshd_inetd_conf_tmp}"
+      fi
+      mv "${_sshd_inetd_conf_tmp}" "${_sshd_inetd_conf}"
+      csih_inform "Updated ${_sshd_inetd_conf}"
+    fi 
 
-  answer=""
-  while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
-  do
-    echo -n "$1 (yes/no) "
-    read -e answer
-  done
-  if [ "X${answer}" = "Xyes" ]
+  elif [ -f "${_inetcnf}" ]
   then
-    return 0
-  else
-    return 1
+    grep -q '^[ \t]*sshd' "${_inetcnf}" && _with_comment=0
+
+    # check for sshd in top-level inetd.conf file, and remove
+    # will be replaced by a file in inetd.d/
+    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
+            csih_inform "Removed sshd from ${_inetcnf}"
+        else
+            csih_warning "Removing sshd from ${_inetcnf} failed!"
+        fi
+        rm -f "${_inetcnf_tmp}"
+      else
+        csih_warning "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
+      csih_inform "Added ssh to ${_inetcnf}"
+    fi
   fi
-}
+} # --- End of update_inetd_conf --- #
 
-# Check options
+# ======================================================================
+# Routine: install_service
+#   Install sshd as a service
+# ======================================================================
+install_service() {
+  local run_service_as
+  local password
 
+  if csih_is_nt
+  then
+    if ! cygrunsrv -Q sshd >/dev/null 2>&1
+    then
+      echo
+      echo
+      csih_warning "The following functions require administrator privileges!"
+      echo
+      echo -e "${_csih_QUERY_STR} Do you want to install sshd as a service?"
+      if csih_request "(Say \"no\" if it is already installed as a service)"
+      then
+        csih_inform "Note that the CYGWIN variable must contain at least \"ntsec\""
+        csih_inform "for sshd to be able to change user context without password."
+        csih_get_cygenv "${cygwin_value}"
+
+        if ( csih_is_nt2003 || [ "$csih_FORCE_PRIVILEGED_USER" = "yes" ] )
+        then
+          csih_inform "On Windows Server 2003, Windows Vista, and above, the"
+          csih_inform "SYSTEM account cannot setuid to other users -- a capability"
+          csih_inform "sshd requires.  You need to have or to create a privileged"
+          csih_inform "account.  This script will help you do so."
+          echo
+          if ! csih_create_privileged_user "${password_value}"
+          then
+            csih_error_recoverable "There was a serious problem creating a privileged user."
+            csih_request "Do you want to proceed anyway?" || exit 1
+          fi
+        fi
+
+        # never returns empty if NT or above
+        run_service_as=$(csih_service_should_run_as)
+
+        if [ "${run_service_as}" = "${csih_PRIVILEGED_USERNAME}" ]
+        then
+          password="${csih_PRIVILEGED_PASSWORD}"
+          if [ -z "${password}" ]
+          then
+            csih_get_value "Please enter the password for user '${run_service_as}':" "-s"
+            password="${csih_value}"
+          fi
+        fi
+
+        # at this point, we either have $run_service_as = "system" and $password is empty,
+        # or $run_service_as is some privileged user and (hopefully) $password contains
+        # the correct password.  So, from here out, we use '-z "${password}"' to discriminate
+        # the two cases.
+
+        csih_check_user "${run_service_as}"
+
+        if [ -z "${password}" ]
+        then
+          if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a "-D" -y tcpip \
+             -e CYGWIN="${csih_cygenv}"
+          then
+            echo
+            csih_inform "The sshd service has been installed under the LocalSystem"
+            csih_inform "account (also known as SYSTEM). To start the service now, call"
+            csih_inform "\`net start sshd' or \`cygrunsrv -S sshd'.  Otherwise, it"
+            csih_inform "will start automatically after the next reboot."
+          fi
+        else
+          if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a "-D" -y tcpip \
+             -e CYGWIN="${csih_cygenv}" -u "${run_service_as}" -w "${password}"
+          then
+            echo
+            csih_inform "The sshd service has been installed under the '${run_service_as}'"
+            csih_inform "account.  To start the service now, call \`net start sshd' or"
+            csih_inform "\`cygrunsrv -S sshd'.  Otherwise, it will start automatically"
+            csih_inform "after the next reboot."
+          fi
+        fi
+
+        # now, if successfully installed, set ownership of the affected files 
+        if cygrunsrv -Q sshd >/dev/null 2>&1
+        then
+          chown "${run_service_as}" ${SYSCONFDIR}/ssh*
+          chown "${run_service_as}".544 ${LOCALSTATEDIR}/empty
+          chown "${run_service_as}".544 ${LOCALSTATEDIR}/log/lastlog
+          if [ -f ${LOCALSTATEDIR}/log/sshd.log ]
+          then
+            chown "${run_service_as}".544 ${LOCALSTATEDIR}/log/sshd.log
+          fi
+        else
+          csih_warning "Something went wrong installing the sshd service."
+        fi
+      fi # user allowed us to install as service
+    fi # service not yet installed
+  fi # csih_is_nt
+} # --- End of install_service --- #
+
+# ======================================================================
+# Main Entry Point
+# ======================================================================
+
+# Check how the script has been started.  If
+#   (1) it has been started by giving the full path and
+#       that path is /etc/postinstall, OR
+#   (2) Otherwise, if the environment variable
+#       SSH_HOST_CONFIG_AUTO_ANSWER_NO is set
+# then set auto_answer to "no".  This allows automatic
+# creation of the config files in /etc w/o overwriting
+# them if they already exist.  In both cases, color
+# escape sequences are suppressed, so as to prevent
+# cluttering setup's logfiles.
+if [ "$PROGDIR" = "/etc/postinstall" ]
+then
+  csih_auto_answer="no"
+  csih_disable_color
+fi
+if [ -n "${SSH_HOST_CONFIG_AUTO_ANSWER_NO}" ]
+then
+  csih_auto_answer="no"
+  csih_disable_color
+fi
+
+# ======================================================================
+# Parse options
+# ======================================================================
 while :
 do
   case $# in
@@ -62,14 +399,15 @@ do
   case "${option}" in
   -d | --debug )
     set -x
+    csih_trace_on
     ;;
 
   -y | --yes )
-    auto_answer=yes
+    csih_auto_answer=yes
     ;;
 
   -n | --no )
-    auto_answer=no
+    csih_auto_answer=no
     ;;
 
   -c | --cygwin )
@@ -87,6 +425,10 @@ do
     shift
     ;;
 
+  --privileged )
+    csih_FORCE_PRIVILEGED_USER=yes
+    ;;
+
   *)
     echo "usage: ${progname} [OPTION]..."
     echo
@@ -98,7 +440,9 @@ do
     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 "  --pwd    -w <passwd>   Use \"pwd\" as password for privileged user."
+    echo "  --privileged           On Windows NT/2k/XP, require privileged user"
+    echo "                         instead of LocalSystem for sshd service."
     echo
     exit 1
     ;;
@@ -106,73 +450,34 @@ do
   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
+# ======================================================================
+# Action!
+# ======================================================================
 
 # 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
+  csih_error "There are still ssh processes running. Please shut them down first."
 fi
 
 # Check for ${SYSCONFDIR} directory
+csih_make_dir "${SYSCONFDIR}" "Cannot create global configuration files."
+chmod 775 "${SYSCONFDIR}"
+setfacl -m u:system:rwx "${SYSCONFDIR}"
 
-if [ -e "${SYSCONFDIR}" -a ! -d "${SYSCONFDIR}" ]
-then
-  echo
-  echo "${SYSCONFDIR} exists but is not a directory."
-  echo "Cannot create global configuration files."
-  echo
-  exit 1
-fi
-
-# Create it if necessary
-
-if [ ! -e "${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 [ -e ${LOCALSTATEDIR}/log -a ! -d ${LOCALSTATEDIR}/log ]
-then
-  echo
-  echo "${LOCALSTATEDIR}/log exists but is not a directory."
-  echo "Cannot create ssh host configuration."
-  echo
-  exit 1
-fi
-if [ ! -e ${LOCALSTATEDIR}/log ]
-then
-  mkdir -p ${LOCALSTATEDIR}/log
-fi
+# Check for /var/log directory
+csih_make_dir "${LOCALSTATEDIR}/log" "Cannot create log directory."
+chmod 775 "${LOCALSTATEDIR}/log"
+setfacl -m u:system:rwx "${LOCALSTATEDIR}/log"
 
+# Create /var/log/lastlog if not already exists
 if [ -e ${LOCALSTATEDIR}/log/lastlog -a ! -f ${LOCALSTATEDIR}/log/lastlog ]
 then
   echo 
-  echo "${LOCALSTATEDIR}/log/lastlog exists, but is not a file."
-  echo "Cannot create ssh host configuration."
-  echo 
-  exit 1
+  csih_error_multi "${LOCALSTATEDIR}/log/lastlog exists, but is not a file." \
+                   "Cannot create ssh host configuration."
 fi
 if [ ! -e ${LOCALSTATEDIR}/log/lastlog ]
 then
@@ -181,443 +486,44 @@ then
 fi
 
 # Create /var/empty file used as chroot jail for privilege separation
-if [ -e ${LOCALSTATEDIR}/empty -a ! -d ${LOCALSTATEDIR}/empty ]
-then
-  echo
-  echo "${LOCALSTATEDIR}/empty exists but is not a directory."
-  echo "Cannot create ssh host configuration."
-  echo
-  exit 1
-if [ ! -e ${LOCALSTATEDIR}/empty ]
-then
-  if ! mkdir -p ${LOCALSTATEDIR}/empty
-  then
-    echo
-    echo "Creating ${LOCALSTATEDIR}/empty directory failed."
-    echo "Cannot create ssh host configuration."
-    echo
-    exit 1
-  fi
-  if [ ${_nt} -gt 0 ]
-  then
-    chmod 755 ${LOCALSTATEDIR}/empty
-  fi
-fi
+csih_make_dir "${LOCALSTATEDIR}/empty" "Cannot create log directory."
+chmod 755 "${LOCALSTATEDIR}/empty"
+setfacl -m u:system:rwx "${LOCALSTATEDIR}/empty"
 
-# First generate host keys if not already existing
+# host keys
+create_host_keys
 
-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
+# use 'cmp' program to determine if a config file is identical
+# to the default version of that config file
+csih_check_program_or_error cmp diffutils
 
-# Check if ssh_config exists. If yes, ask for overwriting
 
-if [ -f "${SYSCONFDIR}/ssh_config" ]
+# handle ssh_config
+csih_install_config "${SYSCONFDIR}/ssh_config"   "${SYSCONFDIR}/defaults"
+if cmp "${SYSCONFDIR}/ssh_config" "${SYSCONFDIR}/defaults/${SYSCONFDIR}/ssh_config" >/dev/null 2>&1
 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
+    csih_inform "Updating ${SYSCONFDIR}/ssh_config file with requested port"
     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 "${SYSCONFDIR}/sshd_config" ]
+# handle sshd_config (and privsep)
+csih_install_config "${SYSCONFDIR}/sshd_config"   "${SYSCONFDIR}/defaults"
+if ! cmp "${SYSCONFDIR}/sshd_config" "${SYSCONFDIR}/defaults/${SYSCONFDIR}/sshd_config" >/dev/null 2>&1
 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
+  grep -q UsePrivilegeSeparation ${SYSCONFDIR}/sshd_config && privsep_configured=yes
 fi
+sshd_privsep
 
-# 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=`mkgroup -l | awk -F: '{if ( $2 == "S-1-5-32-544" ) print $1;}' `
-            if [ -z "${_admingroup}" ]
-            then
-              echo "mkgroup -l produces no group with SID S-1-5-32-544 (Local administrators group)."
-              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 SeTcbPrivilege -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}" -y tcpip
-        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}" -y tcpip
-        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 ${LOCALSTATEDIR}/empty
-      chown "${_user}".544 ${LOCALSTATEDIR}/log/lastlog
-      if [ -f ${LOCALSTATEDIR}/log/sshd.log ]
-      then
-        chown "${_user}".544 ${LOCALSTATEDIR}/log/sshd.log
-      fi
-    fi
-    if ! ( mount | egrep -q 'on /(|usr/(bin|lib)) type system' )
-    then
-      echo
-      echo "Warning: It appears that you have user mode mounts (\"Just me\""
-      echo "chosen during install.)  Any daemons installed as services will"
-      echo "fail to function unless system mounts are used.  To change this,"
-      echo "re-run setup.exe and choose \"All users\"."
-      echo
-      echo "For more information, see http://cygwin.com/faq/faq0.html#TOC33"
-    fi
-  fi
-fi
+update_services_file 
+update_inetd_conf
+install_service
 
 echo
-echo "Host configuration finished. Have fun!"
+csih_inform "Host configuration finished. Have fun!"
+
diff --git a/contrib/cygwin/ssh-user-config b/contrib/cygwin/ssh-user-config
index 9482efe9e..f210bd556 100644
--- a/contrib/cygwin/ssh-user-config
+++ b/contrib/cygwin/ssh-user-config
@@ -1,52 +1,235 @@
-#!/bin/sh
+#!/bin/bash
 #
 # ssh-user-config, Copyright 2000, 2001, 2002, 2003, Red Hat Inc.
 #
 # This file is part of the Cygwin port of OpenSSH.
 
+# ======================================================================
+# Initialization
+# ======================================================================
+PROGNAME=$(basename -- $0)
+_tdir=$(dirname -- $0)
+PROGDIR=$(cd $_tdir && pwd)
+
+CSIH_SCRIPT=/usr/share/csih/cygwin-service-installation-helper.sh
+
+# Subdirectory where the new package is being installed
+PREFIX=/usr
+
 # Directory where the config files are stored
 SYSCONFDIR=/etc
 
-progname=$0
-auto_answer=""
+source ${CSIH_SCRIPT}
+
 auto_passphrase="no"
 passphrase=""
+pwdhome=
+with_passphrase=
+
+# ======================================================================
+# Routine: create_ssh1_identity
+#   optionally create ~/.ssh/identity[.pub]
+#   optionally add result to ~/.ssh/authorized_keys
+# ======================================================================
+create_ssh1_identity() {
+  if [ ! -f "${pwdhome}/.ssh/identity" ]
+  then
+    if csih_request "Shall I create an SSH1 RSA identity file for you?"
+    then
+      csih_inform "Generating ${pwdhome}/.ssh/identity"
+      if [ "${with_passphrase}" = "yes" ]
+      then
+        ssh-keygen -t rsa1 -N "${passphrase}" -f "${pwdhome}/.ssh/identity" > /dev/null
+      else
+        ssh-keygen -t rsa1 -f "${pwdhome}/.ssh/identity" > /dev/null
+      fi
+      if csih_request "Do you want to use this identity to login to this machine?"
+      then
+        csih_inform "Adding to ${pwdhome}/.ssh/authorized_keys"
+        cat "${pwdhome}/.ssh/identity.pub" >> "${pwdhome}/.ssh/authorized_keys"
+      fi
+    fi
+  fi
+} # === End of create_ssh1_identity() === #
+readonly -f create_ssh1_identity
+
+# ======================================================================
+# Routine: create_ssh2_rsa_identity
+#   optionally create ~/.ssh/id_rsa[.pub]
+#   optionally add result to ~/.ssh/authorized_keys
+# ======================================================================
+create_ssh2_rsa_identity() {
+  if [ ! -f "${pwdhome}/.ssh/id_rsa" ]
+  then
+    if csih_request "Shall I create an SSH2 RSA identity file for you?"
+    then
+      csih_inform "Generating ${pwdhome}/.ssh/id_rsa"
+      if [ "${with_passphrase}" = "yes" ]
+      then
+        ssh-keygen -t rsa -N "${passphrase}" -f "${pwdhome}/.ssh/id_rsa" > /dev/null
+      else
+        ssh-keygen -t rsa -f "${pwdhome}/.ssh/id_rsa" > /dev/null
+      fi
+      if csih_request "Do you want to use this identity to login to this machine?"
+      then
+        csih_inform "Adding to ${pwdhome}/.ssh/authorized_keys"
+        cat "${pwdhome}/.ssh/id_rsa.pub" >> "${pwdhome}/.ssh/authorized_keys"
+      fi
+    fi
+  fi
+} # === End of create_ssh2_rsa_identity() === #
+readonly -f create_ssh2_rsa_identity
+
+# ======================================================================
+# Routine: create_ssh2_dsa_identity
+#   optionally create ~/.ssh/id_dsa[.pub]
+#   optionally add result to ~/.ssh/authorized_keys
+# ======================================================================
+create_ssh2_dsa_identity() {
+  if [ ! -f "${pwdhome}/.ssh/id_dsa" ]
+  then
+    if csih_request "Shall I create an SSH2 DSA identity file for you?"
+    then
+      csih_inform "Generating ${pwdhome}/.ssh/id_dsa"
+      if [ "${with_passphrase}" = "yes" ]
+      then
+        ssh-keygen -t dsa -N "${passphrase}" -f "${pwdhome}/.ssh/id_dsa" > /dev/null
+      else
+        ssh-keygen -t dsa -f "${pwdhome}/.ssh/id_dsa" > /dev/null
+      fi
+      if csih_request "Do you want to use this identity to login to this machine?"
+      then
+        csih_inform "Adding to ${pwdhome}/.ssh/authorized_keys"
+        cat "${pwdhome}/.ssh/id_dsa.pub" >> "${pwdhome}/.ssh/authorized_keys"
+      fi
+    fi
+  fi
+} # === End of create_ssh2_dsa_identity() === #
+readonly -f create_ssh2_dsa_identity
+
+# ======================================================================
+# Routine: check_user_homedir
+#   Perform various checks on the user's home directory
+# SETS GLOBAL VARIABLE:
+#   pwdhome
+# ======================================================================
+check_user_homedir() {
+  local uid=$(id -u)
+  pwdhome=$(awk -F: '{ if ( $3 == '${uid}' ) print $6; }' < ${SYSCONFDIR}/passwd)
+  if [ "X${pwdhome}" = "X" ]
+  then
+    csih_error_multiline \
+      "There is no home directory set for you in ${SYSCONFDIR}/passwd." \
+      'Setting $HOME is not sufficient!'
+  fi
+  
+  if [ ! -d "${pwdhome}" ]
+  then
+    csih_error_multiline \
+      "${pwdhome} is set in ${SYSCONFDIR}/passwd as your home directory" \
+      'but it is not a valid directory. Cannot create user identity files.'
+  fi
+  
+  # If home is the root dir, set home to empty string to avoid error messages
+  # in subsequent parts of that script.
+  if [ "X${pwdhome}" = "X/" ]
+  then
+    # But first raise a warning!
+    csih_warning "Your home directory in ${SYSCONFDIR}/passwd is set to root (/). This is not recommended!"
+    if csih_request "Would you like to proceed anyway?"
+    then
+      pwdhome=''
+    else
+      csih_warning "Exiting. Configuration is not complete"
+      exit 1
+    fi
+  fi
+  
+  if [ -d "${pwdhome}" -a csih_is_nt -a -n "`chmod -c g-w,o-w "${pwdhome}"`" ]
+  then
+    echo
+    csih_warning 'group and other have been revoked write permission to your home'
+    csih_warning "directory ${pwdhome}."
+    csih_warning 'This is required by OpenSSH to allow public key authentication using'
+    csih_warning 'the key files stored in your .ssh subdirectory.'
+    csih_warning 'Revert this change ONLY if you know what you are doing!'
+    echo
+  fi
+} # === End of check_user_homedir() === #
+readonly -f check_user_homedir
 
-request()
-{
-  if [ "${auto_answer}" = "yes" ]
+# ======================================================================
+# Routine: check_user_dot_ssh_dir
+#   Perform various checks on the ~/.ssh directory
+# PREREQUISITE:
+#   pwdhome -- check_user_homedir()
+# ======================================================================
+check_user_dot_ssh_dir() {
+  if [ -e "${pwdhome}/.ssh" -a ! -d "${pwdhome}/.ssh" ]
   then
-    return 0
-  elif [ "${auto_answer}" = "no" ]
+    csih_error "${pwdhome}/.ssh is existant but not a directory. Cannot create user identity files."
+  fi
+  
+  if [ ! -e "${pwdhome}/.ssh" ]
   then
-    return 1
+    mkdir "${pwdhome}/.ssh"
+    if [ ! -e "${pwdhome}/.ssh" ]
+    then
+      csih_error "Creating users ${pwdhome}/.ssh directory failed"
+    fi
   fi
+} # === End of check_user_dot_ssh_dir() === #
+readonly -f check_user_dot_ssh_dir
 
-  answer=""
-  while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
-  do
-    echo -n "$1 (yes/no) "
-    read answer
-  done
-  if [ "X${answer}" = "Xyes" ]
+# ======================================================================
+# Routine: fix_authorized_keys_perms
+#   Corrects the permissions of ~/.ssh/authorized_keys
+# PREREQUISITE:
+#   pwdhome   -- check_user_homedir()
+# ======================================================================
+fix_authorized_keys_perms() {
+  if [ csih_is_nt -a -e "${pwdhome}/.ssh/authorized_keys" ]
   then
-    return 0
-  else
-    return 1
+    if ! setfacl -m "u::rw-,g::---,o::---" "${pwdhome}/.ssh/authorized_keys"
+    then
+      csih_warning "Setting correct permissions to ${pwdhome}/.ssh/authorized_keys"
+      csih_warning "failed.  Please care for the correct permissions.  The minimum requirement"
+      csih_warning "is, the owner needs read permissions."
+      echo
+    fi
   fi
-}
+} # === End of fix_authorized_keys_perms() === #
+readonly -f fix_authorized_keys_perms
+
+
+# ======================================================================
+# Main Entry Point
+# ======================================================================
 
-# Check if running on NT
-_sys="`uname -a`"
-_nt=`expr "$_sys" : "CYGWIN_NT"`
-# If running on NT, check if running under 2003 Server or later
-if [ $_nt -gt 0 ]
+# Check how the script has been started.  If
+#   (1) it has been started by giving the full path and
+#       that path is /etc/postinstall, OR
+#   (2) Otherwise, if the environment variable
+#       SSH_USER_CONFIG_AUTO_ANSWER_NO is set
+# then set auto_answer to "no".  This allows automatic
+# creation of the config files in /etc w/o overwriting
+# them if they already exist.  In both cases, color
+# escape sequences are suppressed, so as to prevent
+# cluttering setup's logfiles.
+if [ "$PROGDIR" = "/etc/postinstall" ]
 then
-  _nt2003=`uname | awk -F- '{print ( $2 >= 5.2 ) ? 1 : 0;}'`
+  csih_auto_answer="no"
+  csih_disable_color
+fi
+if [ -n "${SSH_USER_CONFIG_AUTO_ANSWER_NO}" ]
+then
+  csih_auto_answer="no"
+  csih_disable_color
 fi
 
-# Check options
-
+# ======================================================================
+# Parse options
+# ======================================================================
 while :
 do
   case $# in
@@ -61,14 +244,15 @@ do
   case "$option" in
   -d | --debug )
     set -x
+    csih_trace_on
     ;;
 
   -y | --yes )
-    auto_answer=yes
+    csih_auto_answer=yes
     ;;
 
   -n | --no )
-    auto_answer=no
+    csih_auto_answer=no
     ;;
 
   -p | --passphrase )
@@ -77,8 +261,12 @@ do
     shift
     ;;
 
+  --privileged )
+    csih_FORCE_PRIVILEGED_USER=yes
+    ;;
+
   *)
-    echo "usage: ${progname} [OPTION]..."
+    echo "usage: ${PROGNAME} [OPTION]..."
     echo
     echo "This script creates an OpenSSH user configuration."
     echo
@@ -87,6 +275,8 @@ do
     echo "    --yes        -y        Answer all questions with \"yes\" automatically."
     echo "    --no         -n        Answer all questions with \"no\" automatically."
     echo "    --passphrase -p word   Use \"word\" as passphrase automatically."
+    echo "    --privileged           On Windows NT/2k/XP, assume privileged user"
+    echo "                           instead of LocalSystem for sshd service."
     echo
     exit 1
     ;;
@@ -94,157 +284,27 @@ do
   esac
 done
 
-# Ask user if user identity should be generated
+# ======================================================================
+# Action!
+# ======================================================================
 
+# Check passwd file
 if [ ! -f ${SYSCONFDIR}/passwd ]
 then
-  echo "${SYSCONFDIR}/passwd is nonexistant. Please generate an ${SYSCONFDIR}/passwd file"
-  echo 'first using mkpasswd. Check if it contains an entry for you and'
-  echo 'please care for the home directory in your entry as well.'
-  exit 1
-fi
-
-uid=`id -u`
-pwdhome=`awk -F: '{ if ( $3 == '${uid}' ) print $6; }' < ${SYSCONFDIR}/passwd`
-
-if [ "X${pwdhome}" = "X" ]
-then
-  echo "There is no home directory set for you in ${SYSCONFDIR}/passwd."
-  echo 'Setting $HOME is not sufficient!'
-  exit 1
-fi
-
-if [ ! -d "${pwdhome}" ]
-then
-  echo "${pwdhome} is set in ${SYSCONFDIR}/passwd as your home directory"
-  echo 'but it is not a valid directory. Cannot create user identity files.'
-  exit 1
-fi
-
-# If home is the root dir, set home to empty string to avoid error messages
-# in subsequent parts of that script.
-if [ "X${pwdhome}" = "X/" ]
-then
-  # But first raise a warning!
-  echo "Your home directory in ${SYSCONFDIR}/passwd is set to root (/). This is not recommended!"
-  if request "Would you like to proceed anyway?"
-  then
-    pwdhome=''
-  else
-    exit 1
-  fi
-fi
-
-if [ -d "${pwdhome}" -a $_nt -gt 0 -a -n "`chmod -c g-w,o-w "${pwdhome}"`" ]
-then
-  echo
-  echo 'WARNING: group and other have been revoked write permission to your home'
-  echo "         directory ${pwdhome}."
-  echo '         This is required by OpenSSH to allow public key authentication using'
-  echo '         the key files stored in your .ssh subdirectory.'
-  echo '         Revert this change ONLY if you know what you are doing!'
-  echo
-fi
-
-if [ -e "${pwdhome}/.ssh" -a ! -d "${pwdhome}/.ssh" ]
-then
-  echo "${pwdhome}/.ssh is existant but not a directory. Cannot create user identity files."
-  exit 1
-fi
-
-if [ ! -e "${pwdhome}/.ssh" ]
-then
-  mkdir "${pwdhome}/.ssh"
-  if [ ! -e "${pwdhome}/.ssh" ]
-  then
-    echo "Creating users ${pwdhome}/.ssh directory failed"
-    exit 1
-  fi
-fi
-
-if [ $_nt -gt 0 ]
-then
-  _user="system"
-  if [ $_nt2003 -gt 0 ]
-  then
-    grep -q '^sshd_server:' ${SYSCONFDIR}/passwd && _user="sshd_server"
-  fi
-  if ! setfacl -m "u::rwx,u:${_user}:r--,g::---,o::---" "${pwdhome}/.ssh"
-  then
-    echo "${pwdhome}/.ssh couldn't be given the correct permissions."
-    echo "Please try to solve this problem first."
-    exit 1
-  fi
-fi
-
-if [ ! -f "${pwdhome}/.ssh/identity" ]
-then
-  if request "Shall I create an SSH1 RSA identity file for you?"
-  then
-    echo "Generating ${pwdhome}/.ssh/identity"
-    if [ "${with_passphrase}" = "yes" ]
-    then
-      ssh-keygen -t rsa1 -N "${passphrase}" -f "${pwdhome}/.ssh/identity" > /dev/null
-    else
-      ssh-keygen -t rsa1 -f "${pwdhome}/.ssh/identity" > /dev/null
-    fi
-    if request "Do you want to use this identity to login to this machine?"
-    then
-      echo "Adding to ${pwdhome}/.ssh/authorized_keys"
-      cat "${pwdhome}/.ssh/identity.pub" >> "${pwdhome}/.ssh/authorized_keys"
-    fi
-  fi
+  csih_error_multiline \
+    "${SYSCONFDIR}/passwd is nonexistant. Please generate an ${SYSCONFDIR}/passwd file" \
+    'first using mkpasswd. Check if it contains an entry for you and' \
+    'please care for the home directory in your entry as well.'
 fi
 
-if [ ! -f "${pwdhome}/.ssh/id_rsa" ]
-then
-  if request "Shall I create an SSH2 RSA identity file for you?"
-  then
-    echo "Generating ${pwdhome}/.ssh/id_rsa"
-    if [ "${with_passphrase}" = "yes" ]
-    then
-      ssh-keygen -t rsa -N "${passphrase}" -f "${pwdhome}/.ssh/id_rsa" > /dev/null
-    else
-      ssh-keygen -t rsa -f "${pwdhome}/.ssh/id_rsa" > /dev/null
-    fi
-    if request "Do you want to use this identity to login to this machine?"
-    then
-      echo "Adding to ${pwdhome}/.ssh/authorized_keys"
-      cat "${pwdhome}/.ssh/id_rsa.pub" >> "${pwdhome}/.ssh/authorized_keys"
-    fi
-  fi
-fi
+check_user_homedir
+check_user_dot_ssh_dir
+create_ssh1_identity
+create_ssh2_rsa_identity
+create_ssh2_dsa_identity
+fix_authorized_keys_perms
 
-if [ ! -f "${pwdhome}/.ssh/id_dsa" ]
-then
-  if request "Shall I create an SSH2 DSA identity file for you?"
-  then
-    echo "Generating ${pwdhome}/.ssh/id_dsa"
-    if [ "${with_passphrase}" = "yes" ]
-    then
-      ssh-keygen -t dsa -N "${passphrase}" -f "${pwdhome}/.ssh/id_dsa" > /dev/null
-    else
-      ssh-keygen -t dsa -f "${pwdhome}/.ssh/id_dsa" > /dev/null
-    fi
-    if request "Do you want to use this identity to login to this machine?"
-    then
-      echo "Adding to ${pwdhome}/.ssh/authorized_keys"
-      cat "${pwdhome}/.ssh/id_dsa.pub" >> "${pwdhome}/.ssh/authorized_keys"
-    fi
-  fi
-fi
+echo
+csih_inform "Configuration finished. Have fun!"
 
-if [ $_nt -gt 0 -a -e "${pwdhome}/.ssh/authorized_keys" ]
-then
-  if ! setfacl -m "u::rw-,u:${_user}:r--,g::---,o::---" "${pwdhome}/.ssh/authorized_keys"
-  then
-    echo
-    echo "WARNING: Setting correct permissions to ${pwdhome}/.ssh/authorized_keys"
-    echo "failed.  Please care for the correct permissions.  The minimum requirement"
-    echo "is, the owner and ${_user} both need read permissions."
-    echo
-  fi
-fi
 
-echo
-echo "Configuration finished. Have fun!"
diff --git a/contrib/cygwin/sshd-inetd b/contrib/cygwin/sshd-inetd
new file mode 100644
index 000000000..aa6bf073f
--- /dev/null
+++ b/contrib/cygwin/sshd-inetd
@@ -0,0 +1,4 @@
+# This file can be used to enable sshd as a slave of the inetd service
+# To do so, the line below should be uncommented.
+@COMMENT@ ssh  stream  tcp     nowait  root    /usr/sbin/sshd sshd -i
+