#!/bin/sh # # ssh-host-config, Copyright 2000, Red Hat Inc. # # This file is part of the Cygwin port of OpenSSH. # Subdirectory where the new package is being installed PREFIX=/usr # Directory where the config files are stored SYSCONFDIR=/etc # Subdirectory where an old package might be installed OLDPREFIX=/usr/local OLDSYSCONFDIR=${OLDPREFIX}/etc progname=$0 auto_answer="" port_number=22 privsep_configured=no privsep_used=yes sshd_in_passwd=no sshd_in_sam=no request() { if [ "${auto_answer}" = "yes" ] then return 0 elif [ "${auto_answer}" = "no" ] then return 1 fi answer="" while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ] do echo -n "$1 (yes/no) " read answer done if [ "X${answer}" = "Xyes" ] then return 0 else return 1 fi } # Check options while : do case $# in 0) break ;; esac option=$1 shift case "$option" in -d | --debug ) set -x ;; -y | --yes ) auto_answer=yes ;; -n | --no ) auto_answer=no ;; -p | --port ) port_number=$1 shift ;; *) echo "usage: ${progname} [OPTION]..." echo echo "This script creates an OpenSSH host configuration." echo echo "Options:" echo " --debug -d Enable shell's debug output." echo " --yes -y Answer all questions with \"yes\" automatically." echo " --no -n Answer all questions with \"no\" automatically." echo " --port -p sshd listens on port n." echo exit 1 ;; esac done # Check if running on NT _sys="`uname -a`" _nt=`expr "$_sys" : "CYGWIN_NT"` # Check for running ssh/sshd processes first. Refuse to do anything while # some ssh processes are still running if ps -ef | grep -v grep | grep -q ssh then echo echo "There are still ssh processes running. Please shut them down first." echo exit 1 fi # Check for ${SYSCONFDIR} directory if [ -e "${SYSCONFDIR}" -a ! -d "${SYSCONFDIR}" ] then echo echo "${SYSCONFDIR} is existant but not a directory." echo "Cannot create global configuration files." echo exit 1 fi # Create it if necessary if [ ! -e "${SYSCONFDIR}" ] then mkdir "${SYSCONFDIR}" if [ ! -e "${SYSCONFDIR}" ] then echo echo "Creating ${SYSCONFDIR} directory failed" echo exit 1 fi fi # Create /var/log and /var/log/lastlog if not already existing if [ -f /var/log ] then echo "Creating /var/log failed\!" else if [ ! -d /var/log ] then mkdir -p /var/log fi if [ -d /var/log/lastlog ] then echo "Creating /var/log/lastlog failed\!" elif [ ! -f /var/log/lastlog ] then cat /dev/null > /var/log/lastlog fi fi # Create /var/empty file used as chroot jail for privilege separation if [ -f /var/empty ] then echo "Creating /var/empty failed\!" else mkdir -p /var/empty # On NT change ownership of that dir to user "system" if [ $_nt -gt 0 ] then chmod 755 /var/empty chown system.system /var/empty fi fi # Check for an old installation in ${OLDPREFIX} unless ${OLDPREFIX} isn't # the same as ${PREFIX} old_install=0 if [ "${OLDPREFIX}" != "${PREFIX}" ] then if [ -f "${OLDPREFIX}/sbin/sshd" ] then echo echo "You seem to have an older installation in ${OLDPREFIX}." echo # Check if old global configuration files exist if [ -f "${OLDSYSCONFDIR}/ssh_host_key" ] then if request "Do you want to copy your config files to your new installation?" then cp -f ${OLDSYSCONFDIR}/ssh_host_key ${SYSCONFDIR} cp -f ${OLDSYSCONFDIR}/ssh_host_key.pub ${SYSCONFDIR} cp -f ${OLDSYSCONFDIR}/ssh_host_dsa_key ${SYSCONFDIR} cp -f ${OLDSYSCONFDIR}/ssh_host_dsa_key.pub ${SYSCONFDIR} cp -f ${OLDSYSCONFDIR}/ssh_config ${SYSCONFDIR} cp -f ${OLDSYSCONFDIR}/sshd_config ${SYSCONFDIR} fi fi if request "Do you want to erase your old installation?" then rm -f ${OLDPREFIX}/bin/ssh.exe rm -f ${OLDPREFIX}/bin/ssh-config rm -f ${OLDPREFIX}/bin/scp.exe rm -f ${OLDPREFIX}/bin/ssh-add.exe rm -f ${OLDPREFIX}/bin/ssh-agent.exe rm -f ${OLDPREFIX}/bin/ssh-keygen.exe rm -f ${OLDPREFIX}/bin/slogin rm -f ${OLDSYSCONFDIR}/ssh_host_key rm -f ${OLDSYSCONFDIR}/ssh_host_key.pub rm -f ${OLDSYSCONFDIR}/ssh_host_dsa_key rm -f ${OLDSYSCONFDIR}/ssh_host_dsa_key.pub rm -f ${OLDSYSCONFDIR}/ssh_config rm -f ${OLDSYSCONFDIR}/sshd_config rm -f ${OLDPREFIX}/man/man1/ssh.1 rm -f ${OLDPREFIX}/man/man1/scp.1 rm -f ${OLDPREFIX}/man/man1/ssh-add.1 rm -f ${OLDPREFIX}/man/man1/ssh-agent.1 rm -f ${OLDPREFIX}/man/man1/ssh-keygen.1 rm -f ${OLDPREFIX}/man/man1/slogin.1 rm -f ${OLDPREFIX}/man/man8/sshd.8 rm -f ${OLDPREFIX}/sbin/sshd.exe rm -f ${OLDPREFIX}/sbin/sftp-server.exe fi old_install=1 fi fi # First generate host keys if not already existing if [ ! -f "${SYSCONFDIR}/ssh_host_key" ] then echo "Generating ${SYSCONFDIR}/ssh_host_key" ssh-keygen -t rsa1 -f ${SYSCONFDIR}/ssh_host_key -N '' > /dev/null fi if [ ! -f "${SYSCONFDIR}/ssh_host_rsa_key" ] then echo "Generating ${SYSCONFDIR}/ssh_host_rsa_key" ssh-keygen -t rsa -f ${SYSCONFDIR}/ssh_host_rsa_key -N '' > /dev/null fi if [ ! -f "${SYSCONFDIR}/ssh_host_dsa_key" ] then echo "Generating ${SYSCONFDIR}/ssh_host_dsa_key" ssh-keygen -t dsa -f ${SYSCONFDIR}/ssh_host_dsa_key -N '' > /dev/null fi # Check if ssh_config exists. If yes, ask for overwriting if [ -f "${SYSCONFDIR}/ssh_config" ] then if request "Overwrite existing ${SYSCONFDIR}/ssh_config file?" then rm -f "${SYSCONFDIR}/ssh_config" if [ -f "${SYSCONFDIR}/ssh_config" ] then echo "Can't overwrite. ${SYSCONFDIR}/ssh_config is write protected." fi fi fi # Create default ssh_config from here script if [ ! -f "${SYSCONFDIR}/ssh_config" ] then echo "Generating ${SYSCONFDIR}/ssh_config file" cat > ${SYSCONFDIR}/ssh_config << EOF # This is the ssh client system-wide configuration file. See # ssh_config(5) for more information. This file provides defaults for # users, and the values can be changed in per-user configuration files # or on the command line. # Configuration data is parsed as follows: # 1. command line options # 2. user-specific file # 3. system-wide file # Any configuration value is only changed the first time it is set. # Thus, host-specific definitions should be at the beginning of the # configuration file, and defaults at the end. # Site-wide defaults for various options # Host * # ForwardAgent no # ForwardX11 no # RhostsAuthentication no # RhostsRSAAuthentication no # RSAAuthentication yes # PasswordAuthentication yes # BatchMode no # CheckHostIP yes # StrictHostKeyChecking ask # IdentityFile ~/.ssh/identity # IdentityFile ~/.ssh/id_dsa # IdentityFile ~/.ssh/id_rsa # Port 22 # Protocol 2,1 # Cipher 3des # Ciphers aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc # EscapeChar ~ EOF if [ "$port_number" != "22" ] then echo "Host localhost" >> ${SYSCONFDIR}/ssh_config echo " Port $port_number" >> ${SYSCONFDIR}/ssh_config fi fi # Check if sshd_config exists. If yes, ask for overwriting if [ -f "${SYSCONFDIR}/sshd_config" ] then if request "Overwrite existing ${SYSCONFDIR}/sshd_config file?" then rm -f "${SYSCONFDIR}/sshd_config" if [ -f "${SYSCONFDIR}/sshd_config" ] then echo "Can't overwrite. ${SYSCONFDIR}/sshd_config is write protected." fi else grep -q UsePrivilegeSeparation ${SYSCONFDIR}/sshd_config && privsep_configured=yes fi fi # Prior to creating or modifying sshd_config, care for privilege separation if [ "$privsep_configured" != "yes" ] then if [ $_nt -gt 0 ] then echo "Privilege separation is set to yes by default since OpenSSH 3.3." echo "However, this requires a non-privileged account called 'sshd'." echo "For more info on privilege separation read /usr/doc/openssh/README.privsep." echo if request "Shall 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 [ "$sshd_in_sam" != "yes" ] then echo "Warning: The following function requires administrator privileges!" if request "Shall this script create a local user 'sshd' on this machine?" then dos_var_empty=`cygpath -w /var/empty` net user sshd /add /fullname:"sshd privsep" "/homedir:$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/' >> ${SYSCONFDIR}/passwd fi fi else privsep_used=no fi else # On 9x don't use privilege separation. Since security isn't # available it just adds useless addtional processes. privsep_used=no fi fi # Create default sshd_config from here script or modify to add the # missing privsep configuration option if [ ! -f "${SYSCONFDIR}/sshd_config" ] then echo "Generating ${SYSCONFDIR}/sshd_config file" cat > ${SYSCONFDIR}/sshd_config << EOF # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options change a # default value. Port $port_number #Protocol 2,1 #ListenAddress 0.0.0.0 #ListenAddress :: # HostKey for protocol version 1 #HostKey ${SYSCONFDIR}/ssh_host_key # HostKeys for protocol version 2 #HostKey ${SYSCONFDIR}/ssh_host_rsa_key #HostKey ${SYSCONFDIR}/ssh_host_dsa_key # Lifetime and size of ephemeral version 1 server key #KeyRegenerationInterval 3600 #ServerKeyBits 768 # Logging #obsoletes QuietMode and FascistLogging #SyslogFacility AUTH #LogLevel INFO # Authentication: #LoginGraceTime 120 #PermitRootLogin yes # The following setting overrides permission checks on host key files # and directories. For security reasons set this to "yes" when running # NT/W2K, NTFS and CYGWIN=ntsec. StrictModes no #RSAAuthentication yes #PubkeyAuthentication yes #AuthorizedKeysFile .ssh/authorized_keys # rhosts authentication should not be used #RhostsAuthentication no # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # For this to work you will also need host keys in ${SYSCONFDIR}/ssh_known_hosts #RhostsRSAAuthentication no # similar for protocol version 2 #HostbasedAuthentication no # Change to yes if you don't trust ~/.ssh/known_hosts for # RhostsRSAAuthentication and HostbasedAuthentication #IgnoreUserKnownHosts no # To disable tunneled clear text passwords, change to no here! #PasswordAuthentication yes #PermitEmptyPasswords no # Change to no to disable s/key passwords #ChallengeResponseAuthentication yes #X11Forwarding no #X11DisplayOffset 10 #X11UseLocalhost yes #PrintMotd yes #PrintLastLog yes #KeepAlive yes #UseLogin no UsePrivilegeSeparation $privsep_used #PermitUserEnvironment no #Compression yes #MaxStartups 10 # no default banner path #Banner /some/path #VerifyReverseMapping no # override default of no subsystems Subsystem sftp /usr/sbin/sftp-server EOF elif [ "$privsep_configured" != "yes" ] then echo >> ${SYSCONFDIR}/sshd_config echo "UsePrivilegeSeparation $privsep_used" >> ${SYSCONFDIR}/sshd_config fi # Care for services file if [ $_nt -gt 0 ] then _wservices="${SYSTEMROOT}\\system32\\drivers\\etc\\services" _wserv_tmp="${SYSTEMROOT}\\system32\\drivers\\etc\\srv.out.$$" else _wservices="${WINDIR}\\SERVICES" _wserv_tmp="${WINDIR}\\SERV.$$" fi _services=`cygpath -u "${_wservices}"` _serv_tmp=`cygpath -u "${_wserv_tmp}"` mount -t -f "${_wservices}" "${_services}" mount -t -f "${_wserv_tmp}" "${_serv_tmp}" # 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 ${_services}" else echo "Removing sshd from ${_services} failed\!" fi rm -f "${_serv_tmp}" else echo "Removing sshd from ${_services} failed\!" fi fi # Add ssh 22/tcp and ssh 22/udp to services if [ `grep -q 'ssh[ \t][ \t]*22' "${_services}"; echo $?` -ne 0 ] then awk '{ if ( $2 ~ /^23\/tcp/ ) print "ssh 22/tcp #SSH Remote Login Protocol\nssh 22/udp #SSH Remote Login Protocol"; print $0; }' < "${_services}" > "${_serv_tmp}" if [ -f "${_serv_tmp}" ] then if mv "${_serv_tmp}" "${_services}" then echo "Added ssh to ${_services}" else echo "Adding ssh to ${_services} failed\!" fi rm -f "${_serv_tmp}" else echo "Adding ssh to ${_services} failed\!" fi fi umount "${_services}" umount "${_serv_tmp}" # Care for inetd.conf file _inetcnf="${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 [ $_nt -gt 0 ] then echo echo "Do you want to install sshd as service?" if request "(Say \"no\" if it's already installed as service)" then echo echo "Which value should the environment variable CYGWIN have when" echo "sshd starts? It's recommended to set at least \"ntsec\" to be" echo "able to change user context without password." echo -n "Default is \"binmode ntsec tty\". CYGWIN=" read _cygwin [ -z "${_cygwin}" ] && _cygwin="binmode ntsec tty" if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a -D -e "CYGWIN=${_cygwin}" then chown system ${SYSCONFDIR}/ssh* echo echo "The service has been installed under LocalSystem account." fi fi fi if [ "${old_install}" = "1" ] then echo echo "Note: If you have used sshd as service or from inetd, don't forget to" echo " change the path to sshd.exe in the service entry or in inetd.conf." fi echo echo "Host configuration finished. Have fun!"