jailsetup.sh

   1 #!/bin/sh
   2 # The Girocco jail setup script
   3 #
   4 # If the first parameter is "dbonly", setup the database only
   5 #
   6 # We are designed to set up the chroot based on the output of
   7 # `uname -s` by sourcing a suitable system-specific script.
   8 # Unrecognized systems will generate an error.  When using
   9 # "dbonly" the setup of the chroot binaries is skipped so the
  10 # output of `uname -s` does not matter in that case.
  11
  12 set -e
  13
  14 curdir="$(pwd)"
  15 srcdir="$curdir/src"
  16 getent="$srcdir/getent"
  17 . ./shlib.sh
  18
  19 # find_std_utility should always come up with the full path to the standard
  20 # version of the utility whose name is passed as "$1"
  21 getconf="/usr/bin/getconf"
  22 [ -x "$getconf" ] || getconf="/bin/getconf"
  23 [ -x "$getconf" ] || getconf="getconf"
  24 stdpath="$("unset" -f command; "command" "$getconf" "PATH" 2>/dev/null)" || :
  25 ":" "${stdpath:=/bin:/usr/bin}"
  26 stdpath="$stdpath:/sbin:/usr/sbin"
  27 find_std_utility() (
  28         "unset" -f unalias command "$1" >/dev/null 2>&1 || :
  29         "unalias" -a >/dev/null 2>&1 || :
  30         PATH="$stdpath" && "export" PATH || :
  31         "command" -v "$1"
  32 ) 2>/dev/null
  33
  34 dbonly=
  35 [ "$1" != "dbonly" ] || dbonly=1
  36
  37 reserved_users="root sshd _sshd mob git lock bundle nobody everyone $cfg_cgi_user $cfg_mirror_user"
  38
  39 # Require either sshd or _sshd user unless "dbonly"
  40 sshd_user=sshd
  41 if ! "$getent" passwd sshd >/dev/null && ! "$getent" passwd _sshd >/dev/null; then
  42         if [ -n "$dbonly" ]; then
  43                 if ! [ -s etc/passwd ]; then
  44                         # Only complain on initial etc/passwd creation
  45                         echo "WARNING: no sshd or _sshd user, omitting entries from chroot etc/passwd"
  46                 fi
  47                 sshd_user=
  48         else
  49                 echo "*** Error: You do not have required sshd or _sshd user in system." >&2
  50                 exit 1
  51         fi
  52 else
  53         "$getent" passwd sshd >/dev/null || sshd_user=_sshd
  54 fi
  55
  56 # Verify we have all we need
  57 if ! "$getent" passwd "$cfg_mirror_user" >/dev/null; then
  58         echo "*** Error: You do not have \"$cfg_mirror_user\" user in system yet." >&2
  59         exit 1
  60 fi
  61 if ! "$getent" passwd "$cfg_cgi_user" >/dev/null; then
  62         echo "*** Error: You do not have \"$cfg_cgi_user\" user in system yet." >&2
  63         exit 1
  64 fi
  65 if [ -n "$dbonly" ] && [ -z "$cfg_owning_group" ]; then
  66         cfg_owning_group="$("$getent" passwd "$cfg_mirror_user" | cut -d : -f 4)"
  67 elif ! "$getent" group "$cfg_owning_group" >/dev/null; then
  68         echo "*** Error: You do not have \"$cfg_owning_group\" group in system yet." >&2
  69         exit 1
  70 fi
  71
  72 # One last paranoid check before we go writing all over everything
  73 if [ -z "$cfg_chroot" ] || [ "$cfg_chroot" = "/" ]; then
  74         echo "*** Error: chroot location is not set or is invalid." >&2
  75         echo "*** Error: perhaps you have an incorrect Config.pm?" >&2
  76         exit 1
  77 fi
  78
  79 umask 022
  80 mkdir -p "$cfg_chroot"
  81 cd "$cfg_chroot"
  82 chmod 755 "$cfg_chroot" ||
  83         echo "WARNING: Cannot chmod $cfg_chroot"
  84
  85 mkdir -p var/empty
  86 chmod 0555 var/empty ||
  87         echo "WARNING: Cannot chmod a=rx $cfg_chroot/var/empty"
  88
  89 # Set up basic user/group configuration; if there isn't any already
  90 mobpass=
  91 [ -n "$cfg_mob" ] || mobpass='x'
  92 mkdir -p etc
  93 if ! [ -s etc/passwd ]; then
  94         cat >etc/passwd <<EOT
  95 root:x:0:0:system administrator:/var/empty:/bin/false
  96 nobody:x:$("$getent" passwd nobody | cut -d : -f 3-4):unprivileged user:/var/empty:/bin/false
  97 EOT
  98         [ -z "$sshd_user" ] || cat >>etc/passwd <<EOT
  99 sshd:x:$("$getent" passwd $sshd_user | cut -d : -f 3-4):privilege separation:/var/empty:/bin/false
 100 _sshd:x:$("$getent" passwd $sshd_user | cut -d : -f 3-4):privilege separation:/var/empty:/bin/false
 101 EOT
 102         [ "$cfg_cgi_user" = "$cfg_mirror_user" ] || cat >>etc/passwd <<EOT
 103 $cfg_cgi_user:x:$("$getent" passwd "$cfg_cgi_user" | cut -d : -f 3-5):/:/bin/true
 104 EOT
 105         cat >>etc/passwd <<EOT
 106 $cfg_mirror_user:x:$("$getent" passwd "$cfg_mirror_user" | cut -d : -f 3-5):/:/bin/true
 107 everyone:x:65537:$("$getent" group "$cfg_owning_group" | cut -d : -f 3):every user:/:/bin/false
 108 mob:$mobpass:65538:$("$getent" group "$cfg_owning_group" | cut -d : -f 3):the mob:/:/bin/git-shell-verify
 109 git::65539:$("$getent" passwd nobody | cut -d : -f 4):read-only access:/:/bin/git-shell-verify
 110 EOT
 111 elif [ -z "$dbonly" ]; then
 112         # Make sure an sshd entry is present
 113         if ! grep -q '^sshd:' etc/passwd; then
 114                 echo "*** Error: chroot etc/passwd exists but lacks sshd entry." >&2
 115                 exit 1
 116         fi
 117 fi
 118
 119 if ! [ -s etc/group ]; then
 120         cat >etc/group <<EOT
 121 _repo:x:$("$getent" group "$cfg_owning_group" | cut -d : -f 3):$cfg_mirror_user
 122 EOT
 123 fi
 124
 125 # Set up basic default Git configuration
 126 # Initialize one if none exists or update critical variables for an existing one
 127 mkdir -p etc/girocco
 128 didchmod=
 129 if [ -e etc/girocco/.gitconfig ] && ! [ -f etc/girocco/.gitconfig ]; then
 130         echo "*** Error: chroot etc/girocco/.gitconfig exists but is not a file." >&2
 131         exit 1
 132 fi
 133 if [ -f etc/girocco/.gitconfig ]; then
 134         gcerr=0
 135         x="$(git config --file etc/girocco/.gitconfig --get "no--such--section.no  such  subsection.no--such--key")" || gcerr=$?
 136         if [ $gcerr -gt 1 ]; then
 137                 echo "*** Error: chroot etc/girocco/.gitconfig exists but is corrupt." >&2
 138                 echo "*** Error: either remove it or edit it to correct the problem." >&2
 139                 exit 1
 140         fi
 141 fi
 142 if ! [ -s etc/girocco/.gitconfig ]; then
 143         chmod u+w etc/girocco
 144         didchmod=1
 145         cat >etc/girocco/.gitconfig <<EOT
 146 # Any values set here will take effect whenever Girocco runs a git command
 147
 148 EOT
 149 fi
 150 # $1 => name, $2 => value, $3 => overwrite_flag
 151 # if $3 is "2" and $2 is "" value will be unset
 152 update_config_item() {
 153         _existsnot=
 154         _oldval=
 155         _oldval="$(git config --file etc/girocco/.gitconfig --get "$1")" || _existsnot=1
 156         if [ -n "$_existsnot" ]; then
 157                 [ -n "$2" ] || [ "$3" != "2" ] || return 0
 158         else
 159                 [ -n "$3" ] || return 0
 160                 [ "$_oldval" != "$2" ] || { [ "$3" = "2" ] && [ -z "$2" ]; } || return 0
 161         fi
 162         [ -n "$didchmod" ] || { chmod u+w etc/girocco; didchmod=1; }
 163         if [ "$3" = "2" ] && [ -z "$2" ]; then
 164                 git config --file etc/girocco/.gitconfig --unset "$1"
 165         else
 166                 git config --file etc/girocco/.gitconfig "$1" "$2"
 167         fi
 168         if [ -n "$_existsnot" ]; then
 169                 echo "chroot: etc/girocco/.gitconfig: config $1: (created) \"$2\""
 170         elif [ "$3" = "2" ] && [ -z "$2" ]; then
 171                 echo "chroot: etc/girocco/.gitconfig: config $1: (removed)"
 172         else
 173                 echo "chroot: etc/girocco/.gitconfig: config $1: \"$_oldval\" -> \"$2\""
 174         fi
 175 }
 176 if [ -n "$cfg_git_no_mmap" ]; then
 177         update_config_item core.packedGitWindowSize 1m 1
 178 else
 179         update_config_item core.packedGitWindowSize 32m 1
 180 fi
 181 if [ -n "$var_window_memory" ]; then
 182         update_config_item pack.windowMemory "$var_window_memory" 1
 183 fi
 184 if [ -n "$cfg_jgit_compatible_bitmaps" ]; then
 185         update_config_item pack.writeBitmapHashCache false 1
 186 else
 187         update_config_item pack.writeBitmapHashCache true 1
 188 fi
 189 update_config_item core.pager "cat" 1
 190 update_config_item core.compression 5
 191 update_config_item diff.renameLimit 250
 192 update_config_item transfer.unpackLimit 1 1
 193 update_config_item http.lowSpeedLimit 1
 194 update_config_item http.lowSpeedTime 600
 195 update_config_item receive.advertisePushOptions false 1
 196 update_config_item receive.maxInputSize "${cfg_max_receive_size:-0}" 1
 197 update_config_item girocco.notifyHook "${cfg_default_notifyhook}" 2
 198
 199 # set up some default ssh client config just in case (e.g. git-svn)
 200 if [ -e etc/girocco/.ssh ] && ! [ -d etc/girocco/.ssh ]; then
 201         echo "*** Error: chroot etc/girocco/.ssh exists but is not a directory." >&2
 202         exit 1
 203 fi
 204 if [ -e etc/girocco/.ssh/config ] && ! [ -f etc/girocco/.ssh/config ]; then
 205         echo "*** Error: chroot etc/girocco/.ssh/config exists but is not a file." >&2
 206         exit 1
 207 fi
 208 if ! [ -s etc/girocco/.ssh/config ]; then
 209         chmod u+w etc/girocco
 210         didchmod=1
 211         [ -d etc/girocco/.ssh ] || mkdir etc/girocco/.ssh
 212         cat >etc/girocco/.ssh/config <<EOT
 213 # Any values set here will take effect whenever Girocco svn runs an ssh client command
 214 BatchMode yes
 215 StrictHostKeyChecking no
 216 CheckHostIP no
 217 UserKnownHostsFile /dev/null
 218 EOT
 219 fi
 220
 221 [ -z "$didchmod" ] || chmod a-w etc/girocco
 222
 223 mkdir -p etc/sshkeys etc/sshcerts etc/sshactive
 224 for ruser in $reserved_users; do
 225         touch etc/sshkeys/$ruser
 226 done
 227 chgrp $cfg_owning_group etc etc/sshkeys etc/sshcerts etc/sshactive ||
 228         echo "WARNING: Cannot chgrp $cfg_owning_group the etc directories"
 229 chgrp $cfg_owning_group etc/passwd ||
 230         echo "WARNING: Cannot chgrp $cfg_owning_group $cfg_chroot/etc/passwd"
 231 chgrp $cfg_owning_group etc/group ||
 232         echo "WARNING: Cannot chgrp $cfg_owning_group $cfg_chroot/etc/group"
 233 chgrp $cfg_owning_group etc/girocco etc/girocco/.gitconfig ||
 234         echo "WARNING: Cannot chgrp $cfg_owning_group $cfg_chroot/etc/girocco"
 235 chgrp $cfg_owning_group etc/girocco/.ssh etc/girocco/.ssh/config ||
 236         echo "WARNING: Cannot chgrp $cfg_owning_group $cfg_chroot/etc/.ssh"
 237 chmod g+s etc etc/sshkeys etc/sshcerts etc/sshactive ||
 238         echo "WARNING: Cannot chmod g+s the etc directories"
 239 chmod g+w etc etc/sshkeys etc/sshcerts etc/sshactive ||
 240         echo "WARNING: Cannot chmod g+w the etc directories"
 241 chmod g+w etc/passwd etc/group ||
 242         echo "WARNING: Cannot chmod g+w the etc/passwd and/or etc/group files"
 243 chmod go-w etc/passwd etc/girocco etc/girocco/.gitconfig ||
 244         echo "WARNING: Cannot chmod go-w etc/girocco and/or etc/girocco/.gitconfig"
 245 chmod go-w etc/girocco/.ssh etc/girocco/.ssh/config ||
 246         echo "WARNING: Cannot chmod go-w etc/girocco/.ssh and/or etc/girocco/.ssh/config"
 247 chmod go-rwx etc/girocco/.ssh/config ||
 248         echo "WARNING: Cannot chmod go-rwx etc/girocco/.ssh/config"
 249 chmod a-w etc/girocco/.ssh ||
 250         echo "WARNING: Cannot chmod a-w etc/girocco/.ssh"
 251 chmod a-w etc/girocco ||
 252         echo "WARNING: Cannot chmod a-w etc/girocco"
 253 chmod -R g+w etc/sshkeys etc/sshcerts etc/sshactive 2>/dev/null ||
 254         echo "WARNING: Cannot chmod g+w the sshkeys, sshcerts and/or sshactive files"
 255
 256 # Note time of last install
 257 >etc/sshactive/_install
 258
 259 [ -z "$dbonly" ] || exit 0
 260
 261 # Make sure the system type is supported for chroot
 262 sysname="$(uname -s | tr A-Z a-z)" || :
 263 : ${sysname:=linux}
 264 nosshdir=
 265 # These equivalents may need to be expanded at some point
 266 case "$sysname" in
 267         *kfreebsd*)
 268                 sysname=linux;;
 269         *darwin*)
 270                 sysname=darwin;;
 271         *dragonfly*)
 272                 sysname=dragonfly;;
 273         *freebsd*)
 274                 sysname=freebsd;;
 275         *linux*)
 276                 sysname=linux;;
 277 esac
 278
 279 chrootsetup="$curdir/chrootsetup_$sysname.sh"
 280 if ! [ -f "$chrootsetup" ] || ! [ -r "$chrootsetup" ] || ! [ -s "$chrootsetup" ]; then
 281         echo "*** Error: $chrootsetup not found" >&2
 282         echo "*** Error: creating a chroot for a $(uname -s) system is not supported" >&2
 283         exit 1
 284 fi
 285
 286 # validate reporoot, chroot, jailreporoot and sshd_bin before doing anything more
 287
 288 # validates the passed in dir if a second argument is not empty dir must NOT
 289 # start with / otherwise it must.  A trailing '/' is removed and any duplicated
 290 # // are removed and a sole / or empty is disallowed.
 291 make_valid_dir() {
 292         _check="$(echo "$1" | tr -s /)"
 293         _check="${_check%/}"
 294         [ -n "$_check" ] && [ "$_check" != "/" ] || return 1
 295         if [ -z "$2" ]; then
 296                 # must start with '/'
 297                 case "$_check" in /*) :;; *) return 1; esac
 298         else
 299                 # must NOT start with '/'
 300                 case "$_check" in /*) return 1; esac
 301         fi
 302         echo "$_check"
 303 }
 304
 305 if ! reporoot="$(make_valid_dir "$cfg_reporoot")"; then
 306         echo "*** Error: invalid Config::reporoot: $cfg_reporoot" >&2
 307         echo "*** Error: MUST start with '/' and MUST NOT be '/'" >&2
 308         exit 1
 309 fi
 310 if ! chroot="$(make_valid_dir "$cfg_chroot")"; then
 311         echo "*** Error: invalid Config::chroot: $cfg_chroot" >&2
 312         echo "*** Error: MUST start with '/' and MUST NOT be '/'" >&2
 313         exit 1
 314 fi
 315 if ! jailreporoot="$(make_valid_dir "$cfg_jailreporoot" 1)"; then
 316         echo "*** Error: invalid Config::jailreporoot: $cfg_jailreporoot" >&2
 317         echo "*** Error: MUST NOT start with '/' and MUST NOT be ''" >&2
 318         exit 1
 319 fi
 320
 321 # chroot MUST NOT be reporoot
 322 if [ "$chroot" = "$reporoot" ]; then
 323         echo "*** Error: invalid Config::reporoot: $cfg_reporoot" >&2
 324         echo "*** Error: invalid Config::chroot: $cfg_chroot" >&2
 325         echo "*** Error: reporoot and chroot MUST NOT be the same" >&2
 326         exit 1
 327 fi
 328
 329 # chroot MUST NOT be a subdirectory of reporoot
 330 case "$chroot" in "$reporoot"/*)
 331         echo "*** Error: invalid Config::reporoot: $cfg_reporoot" >&2
 332         echo "*** Error: invalid Config::chroot: $cfg_chroot" >&2
 333         echo "*** Error: chroot MUST NOT be a subdirectory of reporoot" >&2
 334         exit 1
 335 esac
 336
 337 # chroot/jailreporoot MUST NOT be a subdirectory of reporoot
 338 case "$chroot/$jailreporoot" in "$reporoot"/*)
 339         echo "*** Error: invalid Config::reporoot: $cfg_reporoot" >&2
 340         echo "*** Error: invalid Config::chroot: $cfg_chroot" >&2
 341         echo "*** Error: invalid Config::jailreporoot: $cfg_jailreporoot" >&2
 342         echo "*** Error: chroot/jailreporoot MUST NOT be a subdirectory of reporoot" >&2
 343         exit 1
 344 esac
 345
 346 # reporoot MUST NOT be a subdirectory of chroot/jailreporoot
 347 case "$reporoot" in "$chroot/$jailreporoot"/*)
 348         echo "*** Error: invalid Config::reporoot: $cfg_reporoot" >&2
 349         echo "*** Error: invalid Config::chroot: $cfg_chroot" >&2
 350         echo "*** Error: invalid Config::jailreporoot: $cfg_jailreporoot" >&2
 351         echo "*** Error: reporoot MUST NOT be a subdirectory of chroot/jailreporoot" >&2
 352         exit 1
 353 esac
 354
 355 # sshd_bin MUST be undef (or empty) or a full absolute path
 356 sshd_bin_bad=
 357 case "$cfg_sshd_bin" in *"/../"*) sshd_bin_bad=1;; ""|/?*) :;; *) sshd_bin_bad=1;; esac
 358 [ -z "$sshd_bin_bad" ] || {
 359         echo "*** Error: invalid Config::sshd_bin $cfg_sshd_bin" >&2
 360         echo "*** Error: if set, sshd_bin must be an absolute path" >&2
 361         exit 1
 362 }
 363 sshd_bin="$cfg_sshd_bin"
 364 [ -n "$sshd_bin" ] || sshd_bin="$(find_std_utility "sshd")" || {
 365         echo "*** Error: Config::sshd_bin is not set and no sshd could be found" >&2
 366         echo "*** Error: please set Config::sshd_bin to an absolute path to sshd" >&2
 367         exit 1
 368 }
 369 [ -x "$sshd_bin" ] && [ -r "$sshd_bin" ] && [ -f "$sshd_bin" ] || {
 370         echo "*** Error: the selected sshd ('$sshd_bin') was not found, not readable or not executable" >&2
 371         exit 1
 372 }
 373
 374 # Set the user and group on the top of the chroot before creating anything else
 375 chown 0:0 "$chroot"
 376
 377 # When we create a fork, the alternates always have an absolute path.
 378 # If reporoot is not --bind mounted at the same location in chroot we must
 379 # create a suitable symlink so the absolute path alternates continue to work
 380 # in the ssh chroot or else forks will be broken in there.
 381 if [ "$reporoot" != "/$jailreporoot" ]; then
 382         mkdirp="$(dirname "${reporoot#/}")"
 383         [ "$mkdirp" = "." ] && mkdirp=
 384         lnback=
 385         [ -z "$mkdirp" ] || lnback="$(echo "$mkdirp/" | sed -e 's,[^/]*/,../,g')"
 386         [ -z "$mkdirp" ] || mkdir -p "$chroot/$mkdirp"
 387         (umask 0; ln -s -f -n "$lnback$jailreporoot" "$chroot$reporoot")
 388         [ $? -eq 0 ] || exit 1
 389 fi
 390
 391 # First, setup basic platform-independent directory structure
 392 mkdir -p bin dev etc lib sbin var/empty var/run "$jailreporoot"
 393 chmod 0555 var/empty
 394 rm -rf usr local
 395 ln -s . usr
 396 ln -s . local
 397
 398 # Now source the platform-specific script that is responsible for dev device
 399 # setup, proc setup (if needed), lib64 setup (if needed) and basic library
 400 # installation to make a chroot operational.  Additionally it will define a
 401 # pull_in_bin function that can be used to add executables and their library
 402 # dependencies to the chroot and finally will install a suitable nc.openbsd
 403 # compatible version of netcat that supports connections to unix sockets.
 404 . "$chrootsetup"
 405
 406 # Now, bring in sshd, sh etc.
 407 # The $chrootsetup script should have already provided a suitable nc.openbsd
 408 install -p "$cfg_basedir/bin/git-shell-verify" bin/git-shell-verify.new
 409 install -p "$cfg_basedir/bin/git-askpass-password" bin/git-askpass-password.new
 410 perl -i -p \
 411         -e 's|^#!.*|#!/bin/sh| if $. == 1;' \
 412         -e 'close ARGV if eof;' \
 413         bin/git-shell-verify.new bin/git-askpass-password.new
 414 mv -f bin/git-askpass-password.new bin/git-askpass-password
 415 mv -f bin/git-shell-verify.new bin/git-shell-verify
 416 pull_in_bin "$cfg_basedir/bin/can_user_push" bin
 417 pull_in_bin "$cfg_basedir/bin/list_packs" bin
 418 pull_in_bin "$cfg_basedir/bin/strftime" bin
 419 pull_in_bin "$var_sh_bin" bin/sh
 420 # be paranoid since these are going into the chroot and make sure
 421 # that we get the "standard" versions of them (they are all standard "POSIX"
 422 # utilities) not some wayward version picked up by a haphazard PATH
 423 pull_in_bin "$(find_std_utility cat     )" bin
 424 pull_in_bin "$(find_std_utility chmod   )" bin
 425 pull_in_bin "$(find_std_utility date    )" bin
 426 pull_in_bin "$(find_std_utility find    )" bin
 427 pull_in_bin "$(find_std_utility mkdir   )" bin
 428 pull_in_bin "$(find_std_utility mv      )" bin
 429 pull_in_bin "$(find_std_utility rm      )" bin
 430 pull_in_bin "$(find_std_utility sleep   )" bin
 431 pull_in_bin "$(find_std_utility sort    )" bin
 432 pull_in_bin "$(find_std_utility touch   )" bin
 433 pull_in_bin "$(find_std_utility tr      )" bin
 434 pull_in_bin "$(find_std_utility wc      )" bin
 435 # this one's already been validated and might be in a non-standard location
 436 pull_in_bin "$sshd_bin" sbin
 437
 438 # ...and the bits of git we need,
 439 # being sure to use the configured git and its --exec-path to find the pieces
 440 for i in git git-index-pack git-receive-pack git-shell git-update-server-info \
 441         git-upload-archive git-upload-pack git-unpack-objects git-config \
 442         git-for-each-ref git-rev-list git-rev-parse git-symbolic-ref; do
 443         pull_in_bin "$var_git_exec_path/$i" bin git
 444 done
 445
 446 # ...and any extras identified by install.sh
 447 # these are also all standard "POSIX" utilities
 448 # ones that a decent sh implementation would have built-in already...
 449 if [ -n "$GIROCCO_CHROOT_EXTRA_INSTALLS" ]; then
 450         for i in $GIROCCO_CHROOT_EXTRA_INSTALLS; do
 451                 pull_in_bin "$(find_std_utility "$(basename "$i")")" bin
 452         done
 453 fi
 454
 455 # Note time of last jailsetup
 456 >etc/sshactive/_jailsetup
 457
 458 # Update permissions on the database files
 459 chown $cfg_cgi_user:$cfg_owning_group etc/passwd etc/group
 460 chown -R $cfg_cgi_user:$cfg_owning_group etc/sshkeys etc/sshcerts etc/sshactive
 461 chown $cfg_mirror_user:$cfg_owning_group etc etc/girocco etc/girocco/.gitconfig
 462 chown $cfg_mirror_user:$cfg_owning_group etc/girocco/.ssh etc/girocco/.ssh/config
 463
 464 # Set up basic sshd configuration:
 465 if [ -n "$nosshdir" ]; then
 466         rm -rf etc/ssh
 467         ln -s . etc/ssh
 468         ! [ -f /etc/moduli ] || { cp -p /etc/moduli etc/; chown 0:0 etc/moduli; }
 469 else
 470         ! [ -e etc/ssh ] || [ -d etc/ssh ] || rm -rf etc/ssh
 471         mkdir -p etc/ssh
 472         ! [ -f /etc/ssh/moduli ] || { cp -p /etc/ssh/moduli etc/ssh/; chown 0:0 etc/ssh/moduli; }
 473 fi
 474 mkdir -p var/run/sshd
 475 if ! [ -s etc/ssh/sshd_config ]; then
 476         cat >etc/ssh/sshd_config <<EOT
 477 Protocol                2
 478 Port                    $cfg_sshd_jail_port
 479 UsePAM                  no
 480 X11Forwarding           no
 481 AllowAgentForwarding    no
 482 AllowTcpForwarding      no
 483 PermitTunnel            no
 484 IgnoreUserKnownHosts    yes
 485 PrintLastLog            no
 486 PrintMotd               no
 487 UseDNS                  no
 488 PermitRootLogin         no
 489 UsePrivilegeSeparation  yes
 490
 491 HostKey                 /etc/ssh/ssh_host_rsa_key
 492 EOT
 493 if [ -z "$cfg_disable_dsa" ]; then
 494         cat >>etc/ssh/sshd_config <<EOT
 495 HostKey                 /etc/ssh/ssh_host_dsa_key
 496 EOT
 497 fi
 498         cat >>etc/ssh/sshd_config <<EOT
 499 AuthorizedKeysFile      /etc/sshkeys/%u
 500 StrictModes             no
 501
 502 # mob and git users:
 503 PermitEmptyPasswords    yes
 504 ChallengeResponseAuthentication no
 505 PasswordAuthentication  yes
 506 EOT
 507 fi
 508 if ! [ -s etc/ssh/ssh_host_rsa_key ]; then
 509         bits=2048
 510         if [ "$cfg_rsakeylength" -gt "$bits" ] 2>/dev/null; then
 511                 bits="$cfg_rsakeylength"
 512         fi
 513         yes | ssh-keygen -b "$bits" -t rsa -N "" -C Girocco -f etc/ssh/ssh_host_rsa_key
 514 fi
 515 if [ -z "$cfg_disable_dsa" ] && ! [ -s etc/ssh/ssh_host_dsa_key ]; then
 516         # ssh-keygen can only create 1024 bit DSA keys
 517         yes | ssh-keygen -b 1024 -t dsa -N "" -C Girocco -f etc/ssh/ssh_host_dsa_key
 518 fi
 519
 520 # Set the final permissions on the binaries and perform any final twiddling
 521 chroot_update_permissions
 522
 523 # Change the owner of the sshd-related files
 524 chown 0:0 etc/ssh/ssh_* etc/ssh/sshd_*
 525
 526 echo "--- Add to your boot scripts: mount --bind $reporoot $chroot/$jailreporoot"
 527 echo "--- Add to your boot scripts: mount --bind /proc $chroot/proc"
 528 echo "--- Add to your syslog configuration: listening on socket $chroot/dev/log"
 529 echo "--- To restart a running jail's sshd: sudo kill -HUP \$(cat $chroot/var/run/sshd.pid)"