--- /dev/null
+# -*-shell-script-*-
+# This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)
+
+# Monkeysphere host diagnostics subcommand
+#
+# The monkeysphere scripts are written by:
+# Jameson Rollins <jrollins@finestructure.net>
+# Jamie McClelland <jm@mayfirst.org>
+# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
+#
+# They are Copyright 2008-2009, and are all released under the GPL,
+# version 3 or later.
+
+# check on the status and validity of the key and public certificates
+
+diagnostics() {
+
+local seckey
+local keysfound
+local curdate
+local warnwindow
+local warndate
+local create
+local expire
+local uid
+local fingerprint
+local badhostkeys
+local sshd_config
+local problemsfound=0
+
+# FIXME: what's the correct, cross-platform answer?
+sshd_config=/etc/ssh/sshd_config
+seckey=$(gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode)
+keysfound=$(echo "$seckey" | grep -c ^sec:)
+curdate=$(date +%s)
+# warn when anything is 2 months away from expiration
+warnwindow='2 months'
+warndate=$(advance_date $warnwindow +%s)
+
+if ! id monkeysphere >/dev/null ; then
+ echo "! No monkeysphere user found! Please create a monkeysphere system user with bash as its shell."
+ problemsfound=$(($problemsfound+1))
+fi
+
+if ! [ -d "$SYSDATADIR" ] ; then
+ echo "! no $SYSDATADIR directory found. Please create it."
+ problemsfound=$(($problemsfound+1))
+fi
+
+echo "Checking host GPG key..."
+if (( "$keysfound" < 1 )); then
+ echo "! No host key found."
+ echo " - Recommendation: run 'monkeysphere-server gen-key'"
+ problemsfound=$(($problemsfound+1))
+elif (( "$keysfound" > 1 )); then
+ echo "! More than one host key found?"
+ # FIXME: recommend a way to resolve this
+ problemsfound=$(($problemsfound+1))
+else
+ create=$(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."
+ echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
+ problemsfound=$(($problemsfound+1))
+ elif (( "$expire" < "$warndate" )); then
+ echo "! Host key expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
+ echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
+ problemsfound=$(($problemsfound+1))
+ fi
+ fi
+
+ # and weirdnesses:
+ if [ "$create" ] && (( "$create" > "$curdate" )); then
+ echo "! Host key was created in the future(?!). Is your clock correct?"
+ echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
+ problemsfound=$(($problemsfound+1))
+ fi
+
+ # check for UserID expiration:
+ echo "$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 ($(date +%F_%T)); use NTP?"
+ problemsfound=$(($problemsfound+1))
+ fi
+ if [ "$expire" ] ; then
+ if (( "$expire" < "$curdate" )); then
+ echo "! User ID '$uid' is expired."
+ # FIXME: recommend a way to resolve this
+ problemsfound=$(($problemsfound+1))
+ elif (( "$expire" < "$warndate" )); then
+ echo "! User ID '$uid' expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
+ # FIXME: recommend a way to resolve this
+ problemsfound=$(($problemsfound+1))
+ fi
+ fi
+ done
+
+# FIXME: verify that the host key is properly published to the
+# keyservers (do this with the non-privileged user)
+
+# FIXME: check that there are valid, non-expired certifying signatures
+# attached to the host key after fetching from the public keyserver
+# (do this with the non-privileged user as well)
+
+# FIXME: propose adding a revoker to the host key if none exist (do we
+# have a way to do that after key generation?)
+
+ # Ensure that the ssh_host_rsa_key file is present and non-empty:
+ echo
+ echo "Checking host SSH key..."
+ if [ ! -s "${SYSDATADIR}/ssh_host_rsa_key" ] ; then
+ echo "! The host key as prepared for SSH (${SYSDATADIR}/ssh_host_rsa_key) is missing or empty."
+ problemsfound=$(($problemsfound+1))
+ else
+ if [ $(ls -l "${SYSDATADIR}/ssh_host_rsa_key" | cut -f1 -d\ ) != '-rw-------' ] ; then
+ echo "! Permissions seem wrong for ${SYSDATADIR}/ssh_host_rsa_key -- should be 0600."
+ problemsfound=$(($problemsfound+1))
+ fi
+
+ # propose changes needed for sshd_config (if any)
+ if ! grep -q "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$" "$sshd_config"; then
+ echo "! $sshd_config does not point to the monkeysphere host key (${SYSDATADIR}/ssh_host_rsa_key)."
+ echo " - Recommendation: add a line to $sshd_config: 'HostKey ${SYSDATADIR}/ssh_host_rsa_key'"
+ problemsfound=$(($problemsfound+1))
+ fi
+ if badhostkeys=$(grep -i '^HostKey' "$sshd_config" | grep -v "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$") ; then
+ echo "! $sshd_config refers to some non-monkeysphere host keys:"
+ echo "$badhostkeys"
+ echo " - Recommendation: remove the above HostKey lines from $sshd_config"
+ problemsfound=$(($problemsfound+1))
+ fi
+
+ # FIXME: test (with ssh-keyscan?) that the running ssh
+ # daemon is actually offering the monkeysphere host key.
+
+ fi
+fi
+
+# FIXME: look at the ownership/privileges of the various keyrings,
+# directories housing them, etc (what should those values be? can
+# we make them as minimal as possible?)
+
+# FIXME: look to see that the ownertrust rules are set properly on the
+# authentication keyring
+
+# FIXME: make sure that at least one identity certifier exists
+
+# FIXME: look at the timestamps on the monkeysphere-generated
+# authorized_keys files -- warn if they seem out-of-date.
+
+# FIXME: check for a cronjob that updates monkeysphere-generated
+# authorized_keys?
+
+echo
+echo "Checking for MonkeySphere-enabled public-key authentication for users ..."
+# Ensure that User ID authentication is enabled:
+if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$" "$sshd_config"; then
+ echo "! $sshd_config does not point to monkeysphere authorized keys."
+ echo " - Recommendation: add a line to $sshd_config: 'AuthorizedKeysFile ${SYSDATADIR}/authorized_keys/%u'"
+ problemsfound=$(($problemsfound+1))
+fi
+if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' "$sshd_config" | grep -v "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$") ; then
+ echo "! $sshd_config refers to non-monkeysphere authorized_keys files:"
+ echo "$badauthorizedkeys"
+ echo " - Recommendation: remove the above AuthorizedKeysFile lines from $sshd_config"
+ problemsfound=$(($problemsfound+1))
+fi
+
+if [ "$problemsfound" -gt 0 ]; then
+ echo "When the above $problemsfound issue"$(if [ "$problemsfound" -eq 1 ] ; then echo " is" ; else echo "s are" ; fi)" resolved, please re-run:"
+ echo " monkeysphere-server diagnostics"
+else
+ echo "Everything seems to be in order!"
+fi
+
+}
projects / monkeysphere.git / blobdiff