########################################################################
usage() {
-cat <<EOF
+ cat <<EOF
usage: $PGRM <subcommand> [options] [args]
MonkeySphere server admin tool.
subcommands:
- update-users (u) [USER]... update user authorized_keys files
-
- gen-key (g) [HOSTNAME] generate gpg key for the server
- -l|--length BITS key length in bits (2048)
- -e|--expire EXPIRE date to expire
- -r|--revoker FINGERPRINT add a revoker
- show-fingerprint (f) show server's host key fingerprint
- publish-key (p) publish server's host key to keyserver
-
- add-identity-certifier (a) KEYID import and tsign a certification key
- -n|--domain DOMAIN limit ID certifications to IDs in DOMAIN ()
- -t|--trust TRUST trust level of certifier (full)
- -d|--depth DEPTH trust depth for certifier (1)
- remove-identity-certifier (r) KEYID remove a certification key
- list-identity-certifiers (l) list certification keys
-
- gpg-authentication-cmd CMD gnupg-authentication command
-
- help (h,?) this help
-
+ update-users (u) [USER]... update user authorized_keys files
+
+ gen-key (g) [NAME[:PORT]] generate gpg key for the server
+ -l|--length BITS key length in bits (2048)
+ -e|--expire EXPIRE date to expire
+ -r|--revoker FINGERPRINT add a revoker
+ add-hostname (n+) NAME[:PORT] add hostname user ID to server key
+ revoke-hostname (n-) NAME[:PORT] revoke hostname user ID
+ show-key (s) output all server host key information
+ fingerprint (f) output just the key fingerprint
+ publish-key (p) publish server host key to keyserver
+ diagnostics (d) report on server monkeysphere status
+
+ add-id-certifier (c+) KEYID import and tsign a certification key
+ -n|--domain DOMAIN limit ID certifications to DOMAIN
+ -t|--trust TRUST trust level of certifier (full)
+ -d|--depth DEPTH trust depth for certifier (1)
+ remove-id-certifier (c-) KEYID remove a certification key
+ list-id-certifiers (c) list certification keys
+
+ gpg-authentication-cmd CMD gnupg-authentication command
+
+ -h|--help|help (h,?) this help
EOF
}
su_monkeysphere_user "gpg $@"
}
+# output key information
+show_server_key() {
+ gpg_host --list-secret-keys --fingerprint
+}
+
+# output just key fingerprint
+fingerprint_server_key() {
+ gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode | \
+ grep '^fpr:' | head -1 | cut -d: -f10
+}
+
# update authorized_keys for users
update_users() {
if [ "$1" ] ; then
log "----- user: $uname -----"
+ # exit if the authorized_user_ids file is empty
if ! check_key_file_permissions "$uname" "$AUTHORIZED_USER_IDS" ; then
- log "Improper permissions on authorized_user_ids file."
+ log "Improper permissions on authorized_user_ids file path."
continue
fi
+ # check permissions on the authorized_keys file path
if ! check_key_file_permissions "$uname" "$RAW_AUTHORIZED_KEYS" ; then
- log "Improper permissions on authorized_keys file."
+ log "Improper permissions on authorized_keys file path path."
continue
fi
chgrp $(getent passwd "$uname" | cut -f4 -d:) "$AUTHORIZED_KEYS"
chmod g+r "$AUTHORIZED_KEYS"
- # if the resulting authorized_keys file is not empty, move
- # it into place
+ # move the resulting authorized_keys file into place
mv -f "$AUTHORIZED_KEYS" "${VARLIB}/authorized_keys/${uname}"
# destroy temporary directory
revoker=
# get options
- TEMP=$(getopt -o l:e:r: -l length:,expire:,revoker: -n "$PGRM" -- "$@")
+ TEMP=$(getopt -o e:l:r -l expire:,length:,revoker: -n "$PGRM" -- "$@")
if [ $? != 0 ] ; then
exit 1
# output the server fingerprint
fingerprint_server_key "=${userID}"
- # find the key fingerprint of the server primary key
- fingerprint=$(gpg_host --list-key --with-colons --with-fingerprint "=${userID}" | \
- grep '^fpr:' | head -1 | cut -d: -f10)
+ # find the key fingerprint of the newly generated key
+ fingerprint=$(fingerprint_server_key)
+
+ # export host ownertrust to authentication keyring
+ log "setting ultimate owner trust for server key..."
+ echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust"
# translate the private key to ssh format, and export to a file
# for sshs usage.
log "Private SSH host key output to file: ${VARLIB}/ssh_host_rsa_key"
}
-# gpg output key fingerprint
-fingerprint_server_key() {
- gpg_host --fingerprint --list-secret-keys
+# add hostname user ID to server key
+add_hostname() {
+ if [ -z "$1" ] ; then
+ failure "You must specify a hostname to add."
+ fi
+
+ userID="ssh://${1}"
+
+ if [ "$(gpg_host --list-key "=${userID}")" ] ; then
+ failure "Host userID '$userID' already exists."
+ fi
+
+ fingerprint=$(fingerprint_server_key)
+
+ adduidCommand=$(cat <<EOF
+adduid
+$userID
+
+
+O
+save
+EOF
+ )
+
+ # add uid
+ echo "$adduidCommand" | gpg_host --quiet --command-fd 0 --edit-key "$fingerprint"
+
+ echo "NOTE: new host userID has not been published."
+ echo "Use '$PGRM publish-key' to publish these changes."
+}
+
+# revoke hostname user ID to server key
+revoke_hostname() {
+ local msg
+ local uidNum
+ local tmpuidMatch
+ local fpr
+ local linenum
+
+ if [ -z "$1" ] ; then
+ failure "You must specify a hostname to revoke."
+ fi
+
+ fpr=$(fingerprint_server_key)
+ tmpuidMatch="u:$(escape "$1")"
+
+ if linenum=$(gpg_host --list-keys --with-colons --fixed-list-mode "$fpr" | egrep '^(uid|uat):' | cut -f2,10 -d: | grep -n -x -F 'r:Foo T. Bar (DO NOT USE!) <foo@example.net>') ; then
+ uidNum=${linenum%%:*}
+ else
+ failure "no non-revoked hostname '$1' is listed."
+ fi
+
+ msg="hostname removed by monkeysphere-server on $(date +%F)"
+
+
+ revuidCommand=$(cat <<EOF
+$uidNum
+revuid
+y
+4
+$msg
+
+y
+save
+EOF
+)
+
+ echo "$revuidCommand" | gpg_host --quiet --command-fd 0 --edit-key "0x$fingerprint"\!
+
+ echo "NOTE: host userID revokation has not been published."
+ echo "Use '$PGRM publish-key' to publish these changes."
}
# publish server key to keyserver
publish_server_key() {
- read -p "Really publish key to $KEYSERVER? (y/N) " OK; OK=${OK:=N}
+ read -p "Really publish host key to $KEYSERVER? (y/N) " OK; OK=${OK:=N}
if [ ${OK/y/Y} != 'Y' ] ; then
failure "aborting."
fi
+ # find the key fingerprint
+ fingerprint=$(fingerprint_server_key)
+
# publish host key
- # FIXME: need to figure out better way to identify host key
- # dummy command so as not to publish fakes keys during testing
- # eventually:
- #gpg_authentication "--keyserver $KEYSERVER --send-keys $(hostname -f)"
- echo "NOT PUBLISHED (to avoid permanent publication errors during monkeysphere development)."
- echo "The following command should publish the key:"
- echo "monkeysphere-server gpg-authentication-cmd '--keyserver $KEYSERVER --send-keys $(hostname -f)'"
- exit 255
+ gpg_authentication "--keyserver $KEYSERVER --send-keys $fingerprint"
+}
+
+diagnostics() {
+# * check on the status and validity of the key and public certificates
+ local seckey
+ local keysfound
+ local curdate
+ local warnwindow
+ local warndate
+ local create
+ local expire
+ local uid
+ local fingerprint
+ local badhostkeys
+
+ seckey=$(fingerprint_server_key)
+ keysfound=$(echo "$seckey" | grep -c ^sec:)
+ curdate=$(date +%s)
+ # warn when anything is 2 months away from expiration
+ warnwindow='2 months'
+ warndate=$(date +%s -d "$warnwindow")
+
+ echo "Checking host GPG key..."
+ if (( "$keysfound" < 1 )); then
+ echo "! No host key found."
+ echo " - Recommendation: run 'monkeysphere-server gen-key'"
+ elif (( "$keysfound" > 1 )); then
+ echo "! More than one host key found?"
+ # FIXME: recommend a way to resolve this
+ else
+ create=$(echo "$seckey" | grep ^sec: | cut -f6 -d:)
+ expire=$(echo "$seckey" | grep ^sec: | cut -f7 -d:)
+ fingerprint=$(echo "$seckey" | grep ^fpr: | head -n1 | cut -f10 -d:)
+ # check for key expiration:
+ if [ "$expire" ]; then
+ if (( "$expire" < "$curdate" )); then
+ echo "! Host key is expired."
+ # FIXME: recommend a way to resolve this other than re-keying?
+ elif (( "$expire" < "$warndate" )); then
+ echo "! Host key expires in less than $warnwindow:" $(date -d "$(( $expire - $curdate )) seconds" +%F)
+ # FIXME: recommend a way to resolve this?
+ fi
+ fi
+
+ # and weirdnesses:
+ if [ "$create" ] && (( "$create" > "$curdate" )); then
+ echo "! Host key was created in the future(?!). Is your clock correct?"
+ echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
+ fi
+
+ # check for UserID expiration:
+ echo "$seckey" | grep ^uid: | cut -d: -f6,7,10 | \
+ while IFS=: read create expire uid ; do
+ # FIXME: should we be doing any checking on the form
+ # of the User ID? Should we be unmangling it somehow?
+
+ if [ "$create" ] && (( "$create" > "$curdate" )); then
+ echo "! User ID '$uid' was created in the future(?!). Is your clock correct?"
+ echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
+ fi
+ if [ "$expire" ] ; then
+ if (( "$expire" < "$curdate" )); then
+ echo "! User ID '$uid' is expired."
+ # FIXME: recommend a way to resolve this
+ elif (( "$expire" < "$warndate" )); then
+ echo "! User ID '$uid' expires in less than $warnwindow:" $(date -d "$(( $expire - $curdate )) seconds" +%F)
+ # FIXME: recommend a way to resolve this
+ fi
+ fi
+ done
+
+# FIXME: verify that the host key is properly published to the
+# keyservers (do this with the non-privileged user)
+
+# FIXME: check that there are valid, non-expired certifying signatures
+# attached to the host key after fetching from the public keyserver
+# (do this with the non-privileged user as well)
+
+# FIXME: propose adding a revoker to the host key if none exist (do we
+# have a way to do that after key generation?)
+
+ # Ensure that the ssh_host_rsa_key file is present and non-empty:
+ echo "Checking host SSH key..."
+ if [ ! -s "${VARLIB}/ssh_host_rsa_key" ] ; then
+ echo "! The host key as prepared for SSH (${VARLIB}/ssh_host_rsa_key) is missing or empty."
+ else
+ if [ $(stat -c '%a' "${VARLIB}/ssh_host_rsa_key") != 600 ] ; then
+ echo "! Permissions seem wrong for ${VARLIB}/ssh_host_rsa_key -- should be 0600."
+ fi
+
+ # propose changes needed for sshd_config (if any)
+ if ! grep -q "^HostKey[[:space:]]\+${VARLIB}/ssh_host_rsa_key$" /etc/ssh/sshd_config; then
+ echo "! /etc/ssh/sshd_config does not point to the monkeysphere host key (${VARLIB}/ssh_host_rsa_key)."
+ echo " - Recommendation: add a line to /etc/ssh/sshd_config: 'HostKey ${VARLIB}/ssh_host_rsa_key'"
+ fi
+ if badhostkeys=$(grep -i '^HostKey' | grep -q -v "^HostKey[[:space:]]\+${VARLIB}/ssh_host_rsa_key$") ; then
+ echo "! /etc/sshd_config refers to some non-monkeysphere host keys:"
+ echo "$badhostkeys"
+ echo " - Recommendation: remove the above HostKey lines from /etc/ssh/sshd_config"
+ fi
+ fi
+ fi
+
+# FIXME: look at the ownership/privileges of the various keyrings,
+# directories housing them, etc (what should those values be? can
+# we make them as minimal as possible?)
+
+# FIXME: look to see that the ownertrust rules are set properly on the
+# authentication keyring
+
+# FIXME: make sure that at least one identity certifier exists
+
+ echo "Checking for MonkeySphere-enabled public-key authentication for users ..."
+ # Ensure that User ID authentication is enabled:
+ if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${VARLIB}/authorized_keys/%u$" /etc/ssh/sshd_config; then
+ echo "! /etc/ssh/sshd_config does not point to monkeysphere authorized keys."
+ echo " - Recommendation: add a line to /etc/ssh/sshd_config: 'AuthorizedKeysFile ${VARLIB}/authorized_keys/%u'"
+ fi
+ if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' | grep -q -v "^AuthorizedKeysFile[[:space:]]\+${VARLIB}/authorized_keys/%u$") ; then
+ echo "! /etc/sshd_config refers to non-monkeysphere authorized_keys files:"
+ echo "$badauthorizedkeys"
+ echo " - Recommendation: remove the above AuthorizedKeysFile lines from /etc/ssh/sshd_config"
+ fi
}
# retrieve key from web of trust, import it into the host keyring, and
fi
export keyID
- # export host ownertrust to authentication keyring
- gpg_host --export-ownertrust | gpg_authentication "--import-ownertrust"
-
# get the key from the key server
gpg_authentication "--keyserver $KEYSERVER --recv-key '$keyID'"
y
save
EOF
-)
+ )
# ltsign the key
echo "$ltsignCommand" | gpg_host --quiet --command-fd 0 --edit-key "$fingerprint"
gen_key "$@"
;;
- 'show-fingerprint'|'f')
+ 'add-hostname'|'add-name'|'n+')
+ add_hostname "$@"
+ ;;
+
+ 'revoke-hostname'|'revoke-name'|'n-')
+ revoke_hostname "$@"
+ ;;
+
+ 'show-key'|'show'|'s')
+ show_server_key
+ ;;
+
+ 'show-fingerprint'|'fingerprint'|'f')
fingerprint_server_key
;;
- 'publish-key'|'p')
+ 'publish-key'|'publish'|'p')
publish_server_key
;;
- 'add-identity-certifier'|'add-certifier'|'a')
- add_certifier "$1"
+ 'diagnostics'|'d')
+ diagnostics
+ ;;
+
+ 'add-identity-certifier'|'add-id-certifier'|'add-certifier'|'c+')
+ add_certifier "$@"
;;
- 'remove-identity-certifier'|'remove-certifier'|'r')
- remove_certifier "$1"
+ 'remove-identity-certifier'|'remove-id-certifier'|'remove-certifier'|'c-')
+ remove_certifier "$@"
;;
- 'list-identity-certifiers'|'list-certifiers'|'list-certifier'|'l')
+ 'list-identity-certifiers'|'list-id-certifiers'|'list-certifiers'|'list-certifier'|'c')
list_certifiers "$@"
;;
gpg_authentication_cmd "$@"
;;
- 'help'|'h'|'?')
+ '--help'|'help'|'-h'|'h'|'?')
usage
;;
projects / monkeysphere.git / blobdiff