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authorDaniel Kahn Gillmor <dkg@fifthhorseman.net>2008-07-31 20:42:49 -0400
committerDaniel Kahn Gillmor <dkg@fifthhorseman.net>2008-07-31 20:42:49 -0400
commit8714868fe12f15afc02ee84379b544774df35c15 (patch)
tree9496f404d69a118735cb4f62649cea70d49a5be9 /src
parent939ccf7fcc6a0e7786bb414c993c9e81e6c65b06 (diff)
initial pass at monkeysphere-server diagnostics (lots more to fill in!)
Diffstat (limited to 'src')
-rwxr-xr-xsrc/monkeysphere-server100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/monkeysphere-server b/src/monkeysphere-server
index ce80059..98b60c0 100755
--- a/src/monkeysphere-server
+++ b/src/monkeysphere-server
@@ -45,6 +45,7 @@ subcommands:
-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
+ diagnostics (d) report on the server's monkeysphere status
add-identity-certifier (a) KEYID import and tsign a certification key
-n|--domain DOMAIN limit ID certifications to IDs in DOMAIN ()
@@ -379,6 +380,101 @@ publish_server_key() {
exit 255
}
+diagnostics() {
+# * check on the status and validity of the key and public certificates
+ local seckey
+ local keysfound
+ local keyexp
+ local curdate
+ local warnwindow
+ local warndate
+
+ seckey=$(gpg_host --list-secret-keys --with-colons --fixed-list-mode)
+ keysfound=$(echo "$seckey" | grep -c ^sec:)
+ curdate=$(date +%s)
+ # warn when anything is 2 months away from expiration
+ warnwindow='2 months'
+ warndate=$(date +%s -d "$warnwindow")
+
+ if (( "$keysfound" < 1 )); then
+ echo "No host key found!"
+ echo "Recommendation: run 'monkeysphere-server gen-key'"
+ else
+ if (( "$keysfound" > 1 )); then
+ echo "more than one host key found?"
+ else
+ # check for key expiration:
+ keyexp=$(echo "$seckey" | grep ^sec: | cut -f7 -d:)
+ if (( "$keyexp" < "$curdate" )); then
+ echo "Host key is expired!"
+ # FIXME: recommend a way to resolve this other than re-keying?
+ elif (( "$keyexp" < "$warndate" )); then
+ echo "Host key expires in less than $warnwindow"
+ # FIXME: recommend a way to resolve this?
+ fi
+ # and weirdnesses:
+ if (( $(echo "$seckey" | grep ^sec: | cut -f6 -d:) > "$curdate" )); then
+ echo "Host key was created in the future(?!). Is your clock correct?"
+ echo "Recommendation: Check clock ($(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 $warnwindow"
+ # FIXME: recommend a way to resolve this
+ fi
+ fi
+ done
+
+# FIXME: verify that the host key is properly published to the
+# keyservers
+
+# FIXME: check that there are valid, non-expired certifying signatures
+# attached to the host key
+
+# FIXME: propose adding a revoker to the host key if none exist (do we
+# have a way to do that after key generation?)
+
+# Ensure that the ssh_host_rsa_key file is present and non-empty:
+ if [ ! -s "${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 [ $(stat -c "${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 ${VARLIB}/ssh_host_rsa_key$" /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
+ 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
+
+}
+
# retrieve key from web of trust, import it into the host keyring, and
# ltsign the key in the host keyring so that it may certify other keys
add_certifier() {
@@ -567,6 +663,10 @@ case $COMMAND in
publish_server_key
;;
+ 'diagnostics'|'d')
+ diagnostics
+ ;;
+
'add-identity-certifier'|'add-certifier'|'a')
add_certifier "$1"
;;