3 # Monkeysphere authentication diagnostics subcommand
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 # * check on the status and validity of the key and public certificates
27 # FIXME: what's the correct, cross-platform answer?
28 sshd_config=/etc/ssh/sshd_config
29 seckey=$(gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode)
30 keysfound=$(echo "$seckey" | grep -c ^sec:)
32 # warn when anything is 2 months away from expiration
34 warndate=$(advance_date $warnwindow +%s)
36 if ! id monkeysphere >/dev/null ; then
37 echo "! No monkeysphere user found! Please create a monkeysphere system user with bash as its shell."
38 problemsfound=$(($problemsfound+1))
41 if ! [ -d "$SYSDATADIR" ] ; then
42 echo "! no $SYSDATADIR directory found. Please create it."
43 problemsfound=$(($problemsfound+1))
46 echo "Checking host GPG key..."
47 if (( "$keysfound" < 1 )); then
48 echo "! No host key found."
49 echo " - Recommendation: run 'monkeysphere-server gen-key'"
50 problemsfound=$(($problemsfound+1))
51 elif (( "$keysfound" > 1 )); then
52 echo "! More than one host key found?"
53 # FIXME: recommend a way to resolve this
54 problemsfound=$(($problemsfound+1))
56 create=$(echo "$seckey" | grep ^sec: | cut -f6 -d:)
57 expire=$(echo "$seckey" | grep ^sec: | cut -f7 -d:)
58 fingerprint=$(echo "$seckey" | grep ^fpr: | head -n1 | cut -f10 -d:)
59 # check for key expiration:
60 if [ "$expire" ]; then
61 if (( "$expire" < "$curdate" )); then
62 echo "! Host key is expired."
63 echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
64 problemsfound=$(($problemsfound+1))
65 elif (( "$expire" < "$warndate" )); then
66 echo "! Host key expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
67 echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
68 problemsfound=$(($problemsfound+1))
73 if [ "$create" ] && (( "$create" > "$curdate" )); then
74 echo "! Host key was created in the future(?!). Is your clock correct?"
75 echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
76 problemsfound=$(($problemsfound+1))
79 # check for UserID expiration:
80 echo "$seckey" | grep ^uid: | cut -d: -f6,7,10 | \
81 while IFS=: read create expire uid ; do
82 # FIXME: should we be doing any checking on the form
83 # of the User ID? Should we be unmangling it somehow?
85 if [ "$create" ] && (( "$create" > "$curdate" )); then
86 echo "! User ID '$uid' was created in the future(?!). Is your clock correct?"
87 echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
88 problemsfound=$(($problemsfound+1))
90 if [ "$expire" ] ; then
91 if (( "$expire" < "$curdate" )); then
92 echo "! User ID '$uid' is expired."
93 # FIXME: recommend a way to resolve this
94 problemsfound=$(($problemsfound+1))
95 elif (( "$expire" < "$warndate" )); then
96 echo "! User ID '$uid' expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
97 # FIXME: recommend a way to resolve this
98 problemsfound=$(($problemsfound+1))
103 # FIXME: verify that the host key is properly published to the
104 # keyservers (do this with the non-privileged user)
106 # FIXME: check that there are valid, non-expired certifying signatures
107 # attached to the host key after fetching from the public keyserver
108 # (do this with the non-privileged user as well)
110 # FIXME: propose adding a revoker to the host key if none exist (do we
111 # have a way to do that after key generation?)
113 # Ensure that the ssh_host_rsa_key file is present and non-empty:
115 echo "Checking host SSH key..."
116 if [ ! -s "${SYSDATADIR}/ssh_host_rsa_key" ] ; then
117 echo "! The host key as prepared for SSH (${SYSDATADIR}/ssh_host_rsa_key) is missing or empty."
118 problemsfound=$(($problemsfound+1))
120 if [ $(ls -l "${SYSDATADIR}/ssh_host_rsa_key" | cut -f1 -d\ ) != '-rw-------' ] ; then
121 echo "! Permissions seem wrong for ${SYSDATADIR}/ssh_host_rsa_key -- should be 0600."
122 problemsfound=$(($problemsfound+1))
125 # propose changes needed for sshd_config (if any)
126 if ! grep -q "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$" "$sshd_config"; then
127 echo "! $sshd_config does not point to the monkeysphere host key (${SYSDATADIR}/ssh_host_rsa_key)."
128 echo " - Recommendation: add a line to $sshd_config: 'HostKey ${SYSDATADIR}/ssh_host_rsa_key'"
129 problemsfound=$(($problemsfound+1))
131 if badhostkeys=$(grep -i '^HostKey' "$sshd_config" | grep -v "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$") ; then
132 echo "! $sshd_config refers to some non-monkeysphere host keys:"
134 echo " - Recommendation: remove the above HostKey lines from $sshd_config"
135 problemsfound=$(($problemsfound+1))
138 # FIXME: test (with ssh-keyscan?) that the running ssh
139 # daemon is actually offering the monkeysphere host key.
144 # FIXME: look at the ownership/privileges of the various keyrings,
145 # directories housing them, etc (what should those values be? can
146 # we make them as minimal as possible?)
148 # FIXME: look to see that the ownertrust rules are set properly on the
149 # authentication keyring
151 # FIXME: make sure that at least one identity certifier exists
153 # FIXME: look at the timestamps on the monkeysphere-generated
154 # authorized_keys files -- warn if they seem out-of-date.
156 # FIXME: check for a cronjob that updates monkeysphere-generated
160 echo "Checking for MonkeySphere-enabled public-key authentication for users ..."
161 # Ensure that User ID authentication is enabled:
162 if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$" "$sshd_config"; then
163 echo "! $sshd_config does not point to monkeysphere authorized keys."
164 echo " - Recommendation: add a line to $sshd_config: 'AuthorizedKeysFile ${SYSDATADIR}/authorized_keys/%u'"
165 problemsfound=$(($problemsfound+1))
167 if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' "$sshd_config" | grep -v "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$") ; then
168 echo "! $sshd_config refers to non-monkeysphere authorized_keys files:"
169 echo "$badauthorizedkeys"
170 echo " - Recommendation: remove the above AuthorizedKeysFile lines from $sshd_config"
171 problemsfound=$(($problemsfound+1))
174 if [ "$problemsfound" -gt 0 ]; then
175 echo "When the above $problemsfound issue"$(if [ "$problemsfound" -eq 1 ] ; then echo " is" ; else echo "s are" ; fi)" resolved, please re-run:"
176 echo " monkeysphere-server diagnostics"
178 echo "Everything seems to be in order!"