3 # monkeysphere-server: MonkeySphere server admin tool
5 # The monkeysphere scripts are written by:
6 # Jameson Rollins <jrollins@fifthhorseman.net>
7 # Jamie McClelland <jm@mayfirst.org>
8 # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
10 # They are Copyright 2008, and are all released under the GPL, version 3
13 ########################################################################
16 SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
18 . "${SYSSHAREDIR}/common" || exit 1
20 SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere"}
23 # monkeysphere temp directory, in sysdatadir to enable atomic moves of
24 # authorized_keys files
25 MSTMPDIR="${SYSDATADIR}/tmp"
28 # UTC date in ISO 8601 format if needed
29 DATE=$(date -u '+%FT%T')
31 # unset some environment variables that could screw things up
37 ########################################################################
39 ########################################################################
43 usage: $PGRM <subcommand> [options] [args]
44 Monkeysphere server admin tool.
47 update-users (u) [USER]... update user authorized_keys files
49 import-key (i) import existing ssh key to gpg
50 --hostname (-h) NAME[:PORT] hostname for key user ID
51 --keyfile (-f) FILE key file to import
52 --expire (-e) EXPIRE date to expire
53 gen-key (g) generate gpg key for the host
54 --hostname (-h) NAME[:PORT] hostname for key user ID
55 --length (-l) BITS key length in bits (2048)
56 --expire (-e) EXPIRE date to expire
57 --revoker (-r) FINGERPRINT add a revoker
58 extend-key (e) EXPIRE extend host key expiration
59 add-hostname (n+) NAME[:PORT] add hostname user ID to host key
60 revoke-hostname (n-) NAME[:PORT] revoke hostname user ID
61 add-revoker (o) FINGERPRINT add a revoker to the host key
62 revoke-key (r) revoke host key
63 show-key (s) output all server host key information
64 publish-key (p) publish server host key to keyserver
65 diagnostics (d) report on server monkeysphere status
67 add-id-certifier (c+) KEYID import and tsign a certification key
68 --domain (-n) DOMAIN limit ID certifications to DOMAIN
69 --trust (-t) TRUST trust level of certifier (full)
70 --depth (-d) DEPTH trust depth for certifier (1)
71 remove-id-certifier (c-) KEYID remove a certification key
72 list-id-certifiers (c) list certification keys
74 gpg-authentication-cmd CMD give a gpg command to the
75 authentication keyring
77 version (v) show version number
83 # function to run command as monkeysphere user
84 su_monkeysphere_user() {
85 # if the current user is the monkeysphere user, then just eval
87 if [ $(id -un) = "$MONKEYSPHERE_USER" ] ; then
90 # otherwise su command as monkeysphere user
92 su "$MONKEYSPHERE_USER" -c "$@"
96 # function to interact with the host gnupg keyring
100 GNUPGHOME="$GNUPGHOME_HOST"
103 # NOTE: we supress this warning because we need the monkeysphere
104 # user to be able to read the host pubring. we realize this might
105 # be problematic, but it's the simplest solution, without too much
107 gpg --no-permission-warning "$@"
110 # always reset the permissions on the host pubring so that the
111 # monkeysphere user can read the trust signatures
112 chgrp "$MONKEYSPHERE_USER" "${GNUPGHOME_HOST}/pubring.gpg"
113 chmod g+r "${GNUPGHOME_HOST}/pubring.gpg"
118 # function to interact with the authentication gnupg keyring
119 # FIXME: this function requires basically accepts only a single
120 # argument because of problems with quote expansion. this needs to be
122 gpg_authentication() {
123 GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
126 su_monkeysphere_user "gpg $@"
129 # output just key fingerprint
130 fingerprint_server_key() {
131 # set the pipefail option so functions fails if can't read sec key
134 gpg_host --list-secret-keys --fingerprint \
135 --with-colons --fixed-list-mode 2> /dev/null | \
136 grep '^fpr:' | head -1 | cut -d: -f10 2>/dev/null
139 # function to check for host secret key
140 check_host_keyring() {
141 fingerprint_server_key >/dev/null \
142 || failure "You don't appear to have a Monkeysphere host key on this server. Please run 'monkeysphere-server gen-key' first."
145 # output key information
151 # FIXME: you shouldn't have to be root to see the host key fingerprint
153 fingerprintPGP=$(fingerprint_server_key)
154 gpg_authentication "--fingerprint --list-key --list-options show-unusable-uids $fingerprintPGP" 2>/dev/null
155 if [ $? -ne 0 ] ; then
156 log info "You must be root to see host OpenPGP fingerprint."
159 echo "OpenPGP fingerprint: $fingerprintPGP"
162 if [ -f "${SYSDATADIR}/ssh_host_rsa_key.pub" ] ; then
163 fingerprintSSH=$(ssh-keygen -l -f "${SYSDATADIR}/ssh_host_rsa_key.pub" | \
164 awk '{ print $1, $2, $4 }')
165 echo "ssh fingerprint: $fingerprintSSH"
167 log info "SSH host key not found."
174 # update authorized_keys for users
177 # get users from command line
180 # or just look at all users if none specified
181 unames=$(getent passwd | cut -d: -f1)
187 MODE="authorized_keys"
190 GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
192 # check to see if the gpg trust database has been initialized
193 if [ ! -s "${GNUPGHOME}/trustdb.gpg" ] ; then
194 failure "GNUPG trust database uninitialized. Please see MONKEYSPHERE-SERVER(8)."
197 # make sure the authorized_keys directory exists
198 mkdir -p "${SYSDATADIR}/authorized_keys"
201 for uname in $unames ; do
202 # check all specified users exist
203 if ! id "$uname" >/dev/null ; then
204 log error "----- unknown user '$uname' -----"
208 log verbose "----- user: $uname -----"
210 # make temporary directory
211 TMPLOC=$(mktemp -d ${MSTMPDIR}/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!"
213 # trap to delete temporary directory on exit
214 trap "rm -rf $TMPLOC" EXIT
216 # create temporary authorized_user_ids file
217 TMP_AUTHORIZED_USER_IDS="${TMPLOC}/authorized_user_ids"
218 touch "$TMP_AUTHORIZED_USER_IDS"
220 # create temporary authorized_keys file
221 AUTHORIZED_KEYS="${TMPLOC}/authorized_keys"
222 touch "$AUTHORIZED_KEYS"
224 # set restrictive permissions on the temporary files
225 # FIXME: is there a better way to do this?
227 chmod 0600 "$AUTHORIZED_KEYS"
228 chmod 0600 "$TMP_AUTHORIZED_USER_IDS"
229 chown -R "$MONKEYSPHERE_USER" "$TMPLOC"
231 # process authorized_user_ids file
232 log debug "checking for authorized_user_ids..."
233 # translating ssh-style path variables
234 authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS")
235 if [ -s "$authorizedUserIDs" ] ; then
236 # check permissions on the authorized_user_ids file path
237 if check_key_file_permissions "$uname" "$authorizedUserIDs" ; then
238 # copy user authorized_user_ids file to temporary
240 cat "$authorizedUserIDs" > "$TMP_AUTHORIZED_USER_IDS"
242 # export needed variables
243 export AUTHORIZED_KEYS
244 export TMP_AUTHORIZED_USER_IDS
246 # process authorized_user_ids file, as monkeysphere
248 su_monkeysphere_user \
249 ". ${SYSSHAREDIR}/common; process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS"
252 log debug "not processing authorized_user_ids."
255 log debug "empty or absent authorized_user_ids file."
258 # add user-controlled authorized_keys file if specified
259 # translate ssh-style path variables
260 rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS")
261 if [ "$rawAuthorizedKeys" != 'none' ] ; then
262 log debug "checking for raw authorized_keys..."
263 if [ -s "$rawAuthorizedKeys" ] ; then
264 # check permissions on the authorized_keys file path
265 if check_key_file_permissions "$uname" "$rawAuthorizedKeys" ; then
266 log verbose "adding raw authorized_keys file... "
267 cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
269 log debug "not adding raw authorized_keys file."
272 log debug "empty or absent authorized_keys file."
276 # move the new authorized_keys file into place
277 if [ -s "$AUTHORIZED_KEYS" ] ; then
278 # openssh appears to check the contents of the
279 # authorized_keys file as the user in question, so the
280 # file must be readable by that user at least.
282 # but in general, we don't want the user tampering with
283 # this file directly, so we'll adopt this approach: Own
284 # the file by the monkeysphere-server invoker (usually
285 # root, but should be the same uid that sshd is launched
286 # as); change the group of the file so that members of the
287 # user's group can read it.
289 # FIXME: is there a better way to do this?
290 chown $(whoami) "$AUTHORIZED_KEYS" && \
291 chgrp $(id -g "$uname") "$AUTHORIZED_KEYS" && \
292 chmod g+r "$AUTHORIZED_KEYS" && \
293 mv -f "$AUTHORIZED_KEYS" "${SYSDATADIR}/authorized_keys/${uname}" || \
295 log error "Failed to install authorized_keys for '$uname'!"
296 rm -f "${SYSDATADIR}/authorized_keys/${uname}"
297 # indicate that there has been a failure:
301 rm -f "${SYSDATADIR}/authorized_keys/${uname}"
307 # destroy temporary directory
312 # import an existing ssh key to a gpg key
314 local hostName=$(hostname -f)
315 local keyFile="/etc/ssh/ssh_host_rsa_key"
319 # check for presense of secret key
320 # FIXME: is this the proper test to be doing here?
321 fingerprint_server_key >/dev/null \
322 && failure "An OpenPGP host key already exists."
340 if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
341 failure "Unknown option '$1'.
342 Type '$PGRM help' for usage."
349 if [ ! -f "$keyFile" ] ; then
350 failure "SSH secret key file '$keyFile' not found."
353 userID="ssh://${hostName}"
355 # prompt about key expiration if not specified
356 keyExpire=$(get_gpg_expiration "$keyExpire")
358 echo "The following key parameters will be used for the host private key:"
359 echo "Import: $keyFile"
360 echo "Name-Real: $userID"
361 echo "Expire-Date: $keyExpire"
363 read -p "Import key? (Y/n) " OK; OK=${OK:=Y}
364 if [ ${OK/y/Y} != 'Y' ] ; then
368 log verbose "importing ssh key..."
369 # translate ssh key to a private key
371 pem2openpgp "$userID" "$keyExpire" < "$sshKey" | gpg_host --import)
373 # find the key fingerprint of the newly converted key
374 fingerprint=$(fingerprint_server_key)
376 # export host ownertrust to authentication keyring
377 log verbose "setting ultimate owner trust for host key..."
378 echo "${fingerprint}:6:" | gpg_host "--import-ownertrust"
379 echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust"
381 # export public key to file
382 gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
383 log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
385 # show info about new key
389 # generate server gpg key
392 local keyLength="2048"
393 local keyUsage="auth"
396 local hostName=$(hostname -f)
401 # check for presense of secret key
402 # FIXME: is this the proper test to be doing here?
403 fingerprint_server_key >/dev/null \
404 && failure "An OpenPGP host key already exists."
426 if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
427 failure "Unknown option '$1'.
428 Type '$PGRM help' for usage."
435 userID="ssh://${hostName}"
437 # prompt about key expiration if not specified
438 keyExpire=$(get_gpg_expiration "$keyExpire")
443 Key-Length: $keyLength
446 Expire-Date: $keyExpire"
448 # add the revoker field if specified
449 # FIXME: the "1:" below assumes that $REVOKER's key is an RSA key.
450 # FIXME: key is marked "sensitive"? is this appropriate?
451 if [ "$revoker" ] ; then
454 Revoker: 1:${revoker} sensitive"
457 echo "The following key parameters will be used for the host private key:"
458 echo "$keyParameters"
460 read -p "Generate key? (Y/n) " OK; OK=${OK:=Y}
461 if [ ${OK/y/Y} != 'Y' ] ; then
466 # must include blank line!
473 log verbose "generating host key..."
474 echo "$keyParameters" | gpg_host --batch --gen-key
476 # find the key fingerprint of the newly generated key
477 fingerprint=$(fingerprint_server_key)
479 # export host ownertrust to authentication keyring
480 log verbose "setting ultimate owner trust for host key..."
481 echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust"
483 # translate the private key to ssh format, and export to a file
485 # NOTE: assumes that the primary key is the proper key to use
487 gpg_host --export-secret-key "$fingerprint" | \
488 openpgp2ssh "$fingerprint" > "${SYSDATADIR}/ssh_host_rsa_key")
489 log info "SSH host private key output to file: ${SYSDATADIR}/ssh_host_rsa_key"
490 ssh-keygen -y -f "${SYSDATADIR}/ssh_host_rsa_key" > "${SYSDATADIR}/ssh_host_rsa_key.pub"
491 log info "SSH host public key output to file: ${SYSDATADIR}/ssh_host_rsa_key.pub"
492 gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
493 log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
495 # show info about new key
499 # extend the lifetime of a host key:
501 local fpr=$(fingerprint_server_key)
504 # get the new expiration date
505 extendTo=$(get_gpg_expiration "$extendTo")
507 gpg_host --quiet --command-fd 0 --edit-key "$fpr" <<EOF
514 echo "NOTE: Host key expiration date adjusted, but not yet published."
515 echo "Run '$PGRM publish-key' to publish the new expiration date."
518 # add hostname user ID to server key
526 if [ -z "$1" ] ; then
527 failure "You must specify a hostname to add."
532 fingerprint=$(fingerprint_server_key)
534 # match to only ultimately trusted user IDs
535 tmpuidMatch="u:$(echo $userID | gpg_escape)"
537 # find the index of the requsted user ID
538 # NOTE: this is based on circumstantial evidence that the order of
539 # this output is the appropriate index
540 if line=$(gpg_host --list-keys --with-colons --fixed-list-mode "0x${fingerprint}!" \
541 | egrep '^(uid|uat):' | cut -f2,10 -d: | grep -n -x -F "$tmpuidMatch") ; then
542 failure "Host userID '$userID' already exists."
545 echo "The following user ID will be added to the host key:"
547 read -p "Are you sure you would like to add this user ID? (y/N) " OK; OK=${OK:=N}
548 if [ ${OK/y/Y} != 'Y' ] ; then
549 failure "User ID not added."
552 # edit-key script command to add user ID
553 adduidCommand=$(cat <<EOF
562 # execute edit-key script
563 if echo "$adduidCommand" | \
564 gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
566 # update the trustdb for the authentication keyring
567 gpg_authentication "--check-trustdb"
572 echo "NOTE: User ID added to key, but key not published."
573 echo "Run '$PGRM publish-key' to publish the new user ID."
575 failure "Problem adding user ID."
579 # revoke hostname user ID to server key
589 if [ -z "$1" ] ; then
590 failure "You must specify a hostname to revoke."
593 echo "WARNING: There is a known bug in this function."
594 echo "This function has been known to occasionally revoke the wrong user ID."
595 echo "Please see the following bug report for more information:"
596 echo "http://web.monkeysphere.info/bugs/revoke-hostname-revoking-wrong-userid/"
597 read -p "Are you sure you would like to proceed? (y/N) " OK; OK=${OK:=N}
598 if [ ${OK/y/Y} != 'Y' ] ; then
604 fingerprint=$(fingerprint_server_key)
606 # match to only ultimately trusted user IDs
607 tmpuidMatch="u:$(echo $userID | gpg_escape)"
609 # find the index of the requsted user ID
610 # NOTE: this is based on circumstantial evidence that the order of
611 # this output is the appropriate index
612 if line=$(gpg_host --list-keys --with-colons --fixed-list-mode "0x${fingerprint}!" \
613 | egrep '^(uid|uat):' | cut -f2,10 -d: | grep -n -x -F "$tmpuidMatch") ; then
616 failure "No non-revoked user ID '$userID' is found."
619 echo "The following host key user ID will be revoked:"
621 read -p "Are you sure you would like to revoke this user ID? (y/N) " OK; OK=${OK:=N}
622 if [ ${OK/y/Y} != 'Y' ] ; then
623 failure "User ID not revoked."
626 message="Hostname removed by monkeysphere-server $DATE"
628 # edit-key script command to revoke user ID
629 revuidCommand=$(cat <<EOF
641 # execute edit-key script
642 if echo "$revuidCommand" | \
643 gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
645 # update the trustdb for the authentication keyring
646 gpg_authentication "--check-trustdb"
651 echo "NOTE: User ID revoked, but revocation not published."
652 echo "Run '$PGRM publish-key' to publish the revocation."
654 failure "Problem revoking user ID."
658 # add a revoker to the host key
661 failure "not implemented yet!"
664 # revoke the host key
667 failure "not implemented yet!"
670 # publish server key to keyserver
671 publish_server_key() {
672 read -p "Really publish host key to $KEYSERVER? (y/N) " OK; OK=${OK:=N}
673 if [ ${OK/y/Y} != 'Y' ] ; then
674 failure "key not published."
677 # find the key fingerprint
678 fingerprint=$(fingerprint_server_key)
681 gpg_authentication "--keyserver $KEYSERVER --send-keys '0x${fingerprint}!'"
686 # * check on the status and validity of the key and public certificates
698 local problemsfound=0
700 # FIXME: what's the correct, cross-platform answer?
701 sshd_config=/etc/ssh/sshd_config
702 seckey=$(gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode)
703 keysfound=$(echo "$seckey" | grep -c ^sec:)
705 # warn when anything is 2 months away from expiration
706 warnwindow='2 months'
707 warndate=$(advance_date $warnwindow +%s)
709 if ! id monkeysphere >/dev/null ; then
710 echo "! No monkeysphere user found! Please create a monkeysphere system user with bash as its shell."
711 problemsfound=$(($problemsfound+1))
714 if ! [ -d "$SYSDATADIR" ] ; then
715 echo "! no $SYSDATADIR directory found. Please create it."
716 problemsfound=$(($problemsfound+1))
719 echo "Checking host GPG key..."
720 if (( "$keysfound" < 1 )); then
721 echo "! No host key found."
722 echo " - Recommendation: run 'monkeysphere-server gen-key'"
723 problemsfound=$(($problemsfound+1))
724 elif (( "$keysfound" > 1 )); then
725 echo "! More than one host key found?"
726 # FIXME: recommend a way to resolve this
727 problemsfound=$(($problemsfound+1))
729 create=$(echo "$seckey" | grep ^sec: | cut -f6 -d:)
730 expire=$(echo "$seckey" | grep ^sec: | cut -f7 -d:)
731 fingerprint=$(echo "$seckey" | grep ^fpr: | head -n1 | cut -f10 -d:)
732 # check for key expiration:
733 if [ "$expire" ]; then
734 if (( "$expire" < "$curdate" )); then
735 echo "! Host key is expired."
736 echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
737 problemsfound=$(($problemsfound+1))
738 elif (( "$expire" < "$warndate" )); then
739 echo "! Host key expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
740 echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
741 problemsfound=$(($problemsfound+1))
746 if [ "$create" ] && (( "$create" > "$curdate" )); then
747 echo "! Host key was created in the future(?!). Is your clock correct?"
748 echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
749 problemsfound=$(($problemsfound+1))
752 # check for UserID expiration:
753 echo "$seckey" | grep ^uid: | cut -d: -f6,7,10 | \
754 while IFS=: read create expire uid ; do
755 # FIXME: should we be doing any checking on the form
756 # of the User ID? Should we be unmangling it somehow?
758 if [ "$create" ] && (( "$create" > "$curdate" )); then
759 echo "! User ID '$uid' was created in the future(?!). Is your clock correct?"
760 echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
761 problemsfound=$(($problemsfound+1))
763 if [ "$expire" ] ; then
764 if (( "$expire" < "$curdate" )); then
765 echo "! User ID '$uid' is expired."
766 # FIXME: recommend a way to resolve this
767 problemsfound=$(($problemsfound+1))
768 elif (( "$expire" < "$warndate" )); then
769 echo "! User ID '$uid' expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
770 # FIXME: recommend a way to resolve this
771 problemsfound=$(($problemsfound+1))
776 # FIXME: verify that the host key is properly published to the
777 # keyservers (do this with the non-privileged user)
779 # FIXME: check that there are valid, non-expired certifying signatures
780 # attached to the host key after fetching from the public keyserver
781 # (do this with the non-privileged user as well)
783 # FIXME: propose adding a revoker to the host key if none exist (do we
784 # have a way to do that after key generation?)
786 # Ensure that the ssh_host_rsa_key file is present and non-empty:
788 echo "Checking host SSH key..."
789 if [ ! -s "${SYSDATADIR}/ssh_host_rsa_key" ] ; then
790 echo "! The host key as prepared for SSH (${SYSDATADIR}/ssh_host_rsa_key) is missing or empty."
791 problemsfound=$(($problemsfound+1))
793 if [ $(ls -l "${SYSDATADIR}/ssh_host_rsa_key" | cut -f1 -d\ ) != '-rw-------' ] ; then
794 echo "! Permissions seem wrong for ${SYSDATADIR}/ssh_host_rsa_key -- should be 0600."
795 problemsfound=$(($problemsfound+1))
798 # propose changes needed for sshd_config (if any)
799 if ! grep -q "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$" "$sshd_config"; then
800 echo "! $sshd_config does not point to the monkeysphere host key (${SYSDATADIR}/ssh_host_rsa_key)."
801 echo " - Recommendation: add a line to $sshd_config: 'HostKey ${SYSDATADIR}/ssh_host_rsa_key'"
802 problemsfound=$(($problemsfound+1))
804 if badhostkeys=$(grep -i '^HostKey' "$sshd_config" | grep -v "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$") ; then
805 echo "! $sshd_config refers to some non-monkeysphere host keys:"
807 echo " - Recommendation: remove the above HostKey lines from $sshd_config"
808 problemsfound=$(($problemsfound+1))
811 # FIXME: test (with ssh-keyscan?) that the running ssh
812 # daemon is actually offering the monkeysphere host key.
817 # FIXME: look at the ownership/privileges of the various keyrings,
818 # directories housing them, etc (what should those values be? can
819 # we make them as minimal as possible?)
821 # FIXME: look to see that the ownertrust rules are set properly on the
822 # authentication keyring
824 # FIXME: make sure that at least one identity certifier exists
826 # FIXME: look at the timestamps on the monkeysphere-generated
827 # authorized_keys files -- warn if they seem out-of-date.
829 # FIXME: check for a cronjob that updates monkeysphere-generated
833 echo "Checking for MonkeySphere-enabled public-key authentication for users ..."
834 # Ensure that User ID authentication is enabled:
835 if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$" "$sshd_config"; then
836 echo "! $sshd_config does not point to monkeysphere authorized keys."
837 echo " - Recommendation: add a line to $sshd_config: 'AuthorizedKeysFile ${SYSDATADIR}/authorized_keys/%u'"
838 problemsfound=$(($problemsfound+1))
840 if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' "$sshd_config" | grep -v "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$") ; then
841 echo "! $sshd_config refers to non-monkeysphere authorized_keys files:"
842 echo "$badauthorizedkeys"
843 echo " - Recommendation: remove the above AuthorizedKeysFile lines from $sshd_config"
844 problemsfound=$(($problemsfound+1))
847 if [ "$problemsfound" -gt 0 ]; then
848 echo "When the above $problemsfound issue"$(if [ "$problemsfound" -eq 1 ] ; then echo " is" ; else echo "s are" ; fi)" resolved, please re-run:"
849 echo " monkeysphere-server diagnostics"
851 echo "Everything seems to be in order!"
855 # retrieve key from web of trust, import it into the host keyring, and
856 # ltsign the key in the host keyring so that it may certify other keys
866 # set default values for trust depth and domain
887 if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
888 failure "Unknown option '$1'.
889 Type '$PGRM help' for usage."
897 if [ -z "$keyID" ] ; then
898 failure "You must specify the key ID of a key to add, or specify a file to read the key from."
900 if [ -f "$keyID" ] ; then
901 echo "Reading key from file '$keyID':"
902 importinfo=$(gpg_authentication "--import" < "$keyID" 2>&1) || failure "could not read key from '$keyID'"
903 # FIXME: if this is tried when the key database is not
904 # up-to-date, i got these errors (using set -x):
906 # ++ su -m monkeysphere -c '\''gpg --import'\''
907 # Warning: using insecure memory!
908 # gpg: key D21739E9: public key "Daniel Kahn Gillmor <dkg@fifthhorseman.net>" imported
909 # gpg: Total number processed: 1
910 # gpg: imported: 1 (RSA: 1)
911 # gpg: can'\''t create `/var/monkeysphere/gnupg-host/pubring.gpg.tmp'\'': Permission denied
912 # gpg: failed to rebuild keyring cache: Permission denied
913 # gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
914 # gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u
915 # gpg: next trustdb check due at 2009-01-10'
916 # + failure 'could not read key from '\''/root/dkg.gpg'\'''
917 # + echo 'could not read key from '\''/root/dkg.gpg'\'''
919 keyID=$(echo "$importinfo" | grep '^gpg: key ' | cut -f2 -d: | cut -f3 -d\ )
920 if [ -z "$keyID" ] || [ $(echo "$keyID" | wc -l) -ne 1 ] ; then
921 failure "Expected there to be a single gpg key in the file."
924 # get the key from the key server
925 gpg_authentication "--keyserver $KEYSERVER --recv-key '0x${keyID}!'" || failure "Could not receive a key with this ID from the '$KEYSERVER' keyserver."
931 # get the full fingerprint of a key ID
932 fingerprint=$(gpg_authentication "--list-key --with-colons --with-fingerprint 0x${keyID}!" | \
933 grep '^fpr:' | grep "$keyID" | cut -d: -f10)
935 if [ -z "$fingerprint" ] ; then
936 failure "Key '$keyID' not found."
941 gpg_authentication "--fingerprint 0x${fingerprint}!"
943 echo "Are you sure you want to add the above key as a"
944 read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N}
945 if [ "${OK/y/Y}" != 'Y' ] ; then
946 failure "Identity certifier not added."
949 # export the key to the host keyring
950 gpg_authentication "--export 0x${fingerprint}!" | gpg_host --import
952 if [ "$trust" = marginal ]; then
954 elif [ "$trust" = full ]; then
957 failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)."
961 # NOTE: *all* user IDs will be ltsigned
962 ltsignCommand=$(cat <<EOF
974 if echo "$ltsignCommand" | \
975 gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
977 # update the trustdb for the authentication keyring
978 gpg_authentication "--check-trustdb"
981 echo "Identity certifier added."
983 failure "Problem adding identify certifier."
987 # delete a certifiers key from the host keyring
993 if [ -z "$keyID" ] ; then
994 failure "You must specify the key ID of a key to remove."
997 if gpg_authentication "--no-options --list-options show-uid-validity --keyring ${GNUPGHOME_AUTHENTICATION}/pubring.gpg --list-key 0x${keyID}!" ; then
998 read -p "Really remove above listed identity certifier? (y/N) " OK; OK=${OK:-N}
999 if [ "${OK/y/Y}" != 'Y' ] ; then
1000 failure "Identity certifier not removed."
1006 # delete the requested key
1007 if gpg_authentication "--delete-key --batch --yes 0x${keyID}!" ; then
1008 # delete key from host keyring as well
1009 gpg_host --delete-key --batch --yes "0x${keyID}!"
1011 # update the trustdb for the authentication keyring
1012 gpg_authentication "--check-trustdb"
1015 echo "Identity certifier removed."
1017 failure "Problem removing identity certifier."
1021 # list the host certifiers
1026 # find trusted keys in authentication keychain
1027 keys=$(gpg_authentication "--no-options --list-options show-uid-validity --keyring ${GNUPGHOME_AUTHENTICATION}/pubring.gpg --list-keys --with-colons --fingerprint" | \
1028 grep ^pub: | cut -d: -f2,5 | egrep '^(u|f):' | cut -d: -f2)
1031 for key in $keys ; do
1032 gpg_authentication "--no-options --list-options show-uid-validity --keyring ${GNUPGHOME_AUTHENTICATION}/pubring.gpg --list-key --fingerprint $key"
1036 # issue command to gpg-authentication keyring
1037 gpg_authentication_cmd() {
1038 gpg_authentication "$@"
1041 ########################################################################
1043 ########################################################################
1045 # unset variables that should be defined only in config file
1047 unset AUTHORIZED_USER_IDS
1048 unset RAW_AUTHORIZED_KEYS
1049 unset MONKEYSPHERE_USER
1051 # load configuration file
1052 [ -e ${MONKEYSPHERE_SERVER_CONFIG:="${SYSCONFIGDIR}/monkeysphere-server.conf"} ] && . "$MONKEYSPHERE_SERVER_CONFIG"
1054 # set empty config variable with ones from the environment, or with
1056 LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=${LOG_LEVEL:="INFO"}}
1057 KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="pool.sks-keyservers.net"}}
1058 AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:=${AUTHORIZED_USER_IDS:="%h/.monkeysphere/authorized_user_ids"}}
1059 RAW_AUTHORIZED_KEYS=${MONKEYSPHERE_RAW_AUTHORIZED_KEYS:=${RAW_AUTHORIZED_KEYS:="%h/.ssh/authorized_keys"}}
1060 MONKEYSPHERE_USER=${MONKEYSPHERE_MONKEYSPHERE_USER:=${MONKEYSPHERE_USER:="monkeysphere"}}
1063 CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="true"}
1064 REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
1065 GNUPGHOME_HOST=${MONKEYSPHERE_GNUPGHOME_HOST:="${SYSDATADIR}/gnupg-host"}
1066 GNUPGHOME_AUTHENTICATION=${MONKEYSPHERE_GNUPGHOME_AUTHENTICATION:="${SYSDATADIR}/gnupg-authentication"}
1068 # export variables needed in su invocation
1071 export MONKEYSPHERE_USER
1074 export CHECK_KEYSERVER
1075 export REQUIRED_USER_KEY_CAPABILITY
1076 export GNUPGHOME_HOST
1077 export GNUPGHOME_AUTHENTICATION
1082 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
1086 'update-users'|'update-user'|'u')
1104 'add-hostname'|'add-name'|'n+')
1109 'revoke-hostname'|'revoke-name'|'n-')
1111 revoke_hostname "$@"
1124 'show-key'|'show'|'s')
1128 'publish-key'|'publish'|'p')
1137 'add-identity-certifier'|'add-id-certifier'|'add-certifier'|'c+')
1142 'remove-identity-certifier'|'remove-id-certifier'|'remove-certifier'|'c-')
1144 remove_certifier "$@"
1147 'list-identity-certifiers'|'list-id-certifiers'|'list-certifiers'|'list-certifier'|'c')
1149 list_certifiers "$@"
1152 'gpg-authentication-cmd')
1153 gpg_authentication_cmd "$@"
1160 '--help'|'help'|'-h'|'h'|'?')
1165 failure "Unknown command: '$COMMAND'
1166 Type '$PGRM help' for usage."