* New upstream release (closes: #474301). Important changes not previously

  backported to 4.7p1:
  - 4.9/4.9p1 (http://www.openssh.com/txt/release-4.9):
    + Added chroot(2) support for sshd(8), controlled by a new option
      "ChrootDirectory" (closes: #139047, LP: #24777).
    + Linked sftp-server(8) into sshd(8). The internal sftp server is used
      when the command "internal-sftp" is specified in a Subsystem or
      ForceCommand declaration. When used with ChrootDirectory, the
      internal sftp server requires no special configuration of files
      inside the chroot environment.
    + Added a protocol extension method "posix-rename@openssh.com" for
      sftp-server(8) to perform POSIX atomic rename() operations; sftp(1)
      prefers this if available (closes: #308561).
    + Removed the fixed limit of 100 file handles in sftp-server(8).
    + ssh(8) will now skip generation of SSH protocol 1 ephemeral server
      keys when in inetd mode and protocol 2 connections are negotiated.
      This speeds up protocol 2 connections to inetd-mode servers that
      also allow Protocol 1.
    + Accept the PermitRootLogin directive in a sshd_config(5) Match
      block. Allows for, e.g. permitting root only from the local network.
    + Reworked sftp(1) argument splitting and escaping to be more
      internally consistent (i.e. between sftp commands) and more
      consistent with sh(1). Please note that this will change the
      interpretation of some quoted strings, especially those with
      embedded backslash escape sequences.
    + Support "Banner=none" in sshd_config(5) to disable sending of a
      pre-login banner (e.g. in a Match block).
    + ssh(1) ProxyCommands are now executed with $SHELL rather than
      /bin/sh.
    + ssh(1)'s ConnectTimeout option is now applied to both the TCP
      connection and the SSH banner exchange (previously it just covered
      the TCP connection). This allows callers of ssh(1) to better detect
      and deal with stuck servers that accept a TCP connection but don't
      progress the protocol, and also makes ConnectTimeout useful for
      connections via a ProxyCommand.
    + scp(1) incorrectly reported "stalled" on slow copies (closes:
      #140828).
    + scp(1) date underflow for timestamps before epoch.
    + ssh(1) used the obsolete SIG DNS RRtype for host keys in DNS,
      instead of the current standard RRSIG.
    + Correctly drain ACKs when a sftp(1) upload write fails midway,
      avoids a fatal() exit from what should be a recoverable condition.
    + Fixed ssh-keygen(1) selective host key hashing (i.e. "ssh-keygen -HF
      hostname") to not include any IP address in the data to be hashed.
    + Make ssh(1) skip listening on the IPv6 wildcard address when a
      binding address of 0.0.0.0 is used against an old SSH server that
      does not support the RFC4254 syntax for wildcard bind addresses.
    + Enable IPV6_V6ONLY socket option on sshd(8) listen socket, as is
      already done for X11/TCP forwarding sockets (closes: #439661).
    + Fix FD leak that could hang a ssh(1) connection multiplexing master.
    + Make ssh(1) -q option documentation consistent with reality.
    + Fixed sshd(8) PAM support not calling pam_session_close(), or
      failing to call it with root privileges (closes: #372680).
    + Fix activation of OpenSSL engine support when requested in configure
      (LP: #119295).
  - 5.1/5.1p1 (http://www.openssh.com/txt/release-5.1):
    + Introduce experimental SSH Fingerprint ASCII Visualisation to ssh(1)
      and ssh-keygen(1). Visual fingerprint display is controlled by a new
      ssh_config(5) option "VisualHostKey". The intent is to render SSH
      host keys in a visual form that is amenable to easy recall and
      rejection of changed host keys.
    + sshd_config(5) now supports CIDR address/masklen matching in "Match
      address" blocks, with a fallback to classic wildcard matching.
    + sshd(8) now supports CIDR matching in ~/.ssh/authorized_keys
      from="..." restrictions, also with a fallback to classic wildcard
      matching.
    + Added an extended test mode (-T) to sshd(8) to request that it write
      its effective configuration to stdout and exit. Extended test mode
      also supports the specification of connection parameters (username,
      source address and hostname) to test the application of
      sshd_config(5) Match rules.
    + ssh(1) now prints the number of bytes transferred and the overall
      connection throughput for SSH protocol 2 sessions when in verbose
      mode (previously these statistics were displayed for protocol 1
      connections only).
    + sftp-server(8) now supports extension methods statvfs@openssh.com
      and fstatvfs@openssh.com that implement statvfs(2)-like operations.
    + sftp(1) now has a "df" command to the sftp client that uses the
      statvfs@openssh.com to produce a df(1)-like display of filesystem
      space and inode utilisation (requires statvfs@openssh.com support on
      the server).
    + Added a MaxSessions option to sshd_config(5) to allow control of the
      number of multiplexed sessions supported over a single TCP
      connection. This allows increasing the number of allowed sessions
      above the previous default of 10, disabling connection multiplexing
      (MaxSessions=1) or disallowing login/shell/subsystem sessions
      entirely (MaxSessions=0).
    + Added a no-more-sessions@openssh.com global request extension that
      is sent from ssh(1) to sshd(8) when the client knows that it will
      never request another session (i.e. when session multiplexing is
      disabled). This allows a server to disallow further session requests
      and terminate the session in cases where the client has been
      hijacked.
    + ssh-keygen(1) now supports the use of the -l option in combination
      with -F to search for a host in ~/.ssh/known_hosts and display its
      fingerprint.
    + ssh-keyscan(1) now defaults to "rsa" (protocol 2) keys, instead of
      "rsa1".
    + Added an AllowAgentForwarding option to sshd_config(8) to control
      whether authentication agent forwarding is permitted. Note that this
      is a loose control, as a client may install their own unofficial
      forwarder.
    + ssh(1) and sshd(8): avoid unnecessary malloc/copy/free when
      receiving network data, resulting in a ~10% speedup.
    + ssh(1) and sshd(8) will now try additional addresses when connecting
      to a port forward destination whose DNS name resolves to more than
      one address. The previous behaviour was to try the only first
      address and give up if that failed.
    + ssh(1) and sshd(8) now support signalling that channels are
      half-closed for writing, through a channel protocol extension
      notification "eow@openssh.com". This allows propagation of closed
      file descriptors, so that commands such as "ssh -2 localhost od
      /bin/ls | true" do not send unnecessary data over the wire.
    + sshd(8): increased the default size of ssh protocol 1 ephemeral keys
      from 768 to 1024 bits.
    + When ssh(1) has been requested to fork after authentication ("ssh
      -f") with ExitOnForwardFailure enabled, delay the fork until after
      replies for any -R forwards have been seen. Allows for robust
      detection of -R forward failure when using -f.
    + "Match group" blocks in sshd_config(5) now support negation of
      groups. E.g. "Match group staff,!guests".
    + sftp(1) and sftp-server(8) now allow chmod-like operations to set
      set[ug]id/sticky bits.
    + The MaxAuthTries option is now permitted in sshd_config(5) match
      blocks.
    + Multiplexed ssh(1) sessions now support a subset of the ~ escapes
      that are available to a primary connection.
    + ssh(1) connection multiplexing will now fall back to creating a new
      connection in most error cases (closes: #352830).
    + Make ssh(1) deal more gracefully with channel requests that fail.
      Previously it would optimistically assume that requests would always
      succeed, which could cause hangs if they did not (e.g. when the
      server runs out of file descriptors).
    + ssh(1) now reports multiplexing errors via the multiplex slave's
      stderr where possible (subject to LogLevel in the mux master).
    + Prevent sshd(8) from erroneously applying public key restrictions
      leaned from ~/.ssh/authorized_keys to other authentication methods
      when public key authentication subsequently fails (LP: #161047).
    + Fixed an UMAC alignment problem that manifested on Itanium
      platforms.

1 files changed, 408 insertions, 490 deletions

diff --git a/contrib/cygwin/ssh-host-config b/contrib/cygwin/ssh-host-config
index e2ad69f19..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 --- #
+
+# ======================================================================
+# Routine: sshd_privsep
+#  MODIFIES: privsep_configured  privsep_used
+# ======================================================================
+sshd_privsep() {
+  local sshdconfig_tmp
 
-request()
-{
-  if [ "${auto_answer}" = "yes" ]
+  if [ "${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
 
-  answer=""
-  while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
-  do
-    echo -n "$1 (yes/no) "
-    read -e answer
-  done
-  if [ "X${answer}" = "Xyes" ]
+      # 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 ${_sshd_inetd_conf}"
+    fi 
+
+  elif [ -f "${_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 "${SYSCONFDIR} is existant but not a directory."
-  echo "Cannot create global configuration files."
-  echo
-  exit 1
-fi
-
-# Create it if necessary
-
-if [ ! -e "${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 [ -e ${LOCALSTATEDIR}/log -a ! -d ${LOCALSTATEDIR}/log ]
-then
-  echo
-  echo "${LOCALSTATEDIR}/log is existant but 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
@@ -181,431 +486,44 @@ then
 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 ${LOCALSTATEDIR}/empty
-  fi
-fi
+csih_make_dir "${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
+# 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
 
-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 "${SYSCONFDIR}/ssh_host_dsa_key" ]
+# handle ssh_config
+csih_install_config "${SYSCONFDIR}/ssh_config"   "${SYSCONFDIR}/defaults"
+if cmp "${SYSCONFDIR}/ssh_config" "${SYSCONFDIR}/defaults/${SYSCONFDIR}/ssh_config" >/dev/null 2>&1
 then
-  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
+    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!"
+