src/share/ma/diagnostics

   1 # -*-shell-script-*-
   2 # This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)
   3
   4 # Monkeysphere authentication diagnostics subcommand
   5 #
   6 # The monkeysphere scripts are written by:
   7 # Jameson Rollins <jrollins@finestructure.net>
   8 # Jamie McClelland <jm@mayfirst.org>
   9 # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
  10 #
  11 # They are Copyright 2008-2009, and are all released under the GPL,
  12 # version 3 or later.
  13
  14 # check on the status and validity of the key and public certificates
  15
  16 diagnostics() {
  17
  18 local seckey
  19 local keysfound
  20 local curdate
  21 local warnwindow
  22 local warndate
  23 local create
  24 local expire
  25 local uid
  26 local fingerprint
  27 local badhostkeys
  28 local sshd_config
  29 local problemsfound=0
  30
  31 report_cruft
  32
  33 if ! id monkeysphere >/dev/null ; then
  34     echo "! No monkeysphere user found!  Please create a monkeysphere system user with bash as its shell."
  35     problemsfound=$(($problemsfound+1))
  36 fi
  37
  38 if ! [ -d "$SYSDATADIR" ] ; then
  39     echo "! no $SYSDATADIR directory found.  Please create it."
  40     problemsfound=$(($problemsfound+1))
  41 fi
  42
  43 echo "Checking for authentication directory..."
  44 if ! [ -d "$MADATADIR" ] ; then
  45     echo "! No authentication data directory found."
  46     echo " - Recommendation: run 'monkeysphere-authentication setup'"
  47     exit
  48 fi
  49
  50 # FIXME: what's the correct, cross-platform way to determine where
  51 # sshd_config lives?
  52 sshd_config=/etc/ssh/sshd_config
  53
  54 seckey=$(gpg_core --list-secret-keys --fingerprint --with-colons --fixed-list-mode)
  55 keysfound=$(echo "$seckey" | grep -c ^sec:)
  56 curdate=$(date +%s)
  57 # warn when anything is 2 months away from expiration
  58 warnwindow='2 months'
  59 warndate=$(advance_date $warnwindow +%s)
  60
  61 echo "Checking core GPG key..."
  62 if (( "$keysfound" < 1 )); then
  63     echo "! No core key found."
  64     echo " - Recommendation: run 'monkeysphere-authentication setup'"
  65     problemsfound=$(($problemsfound+1))
  66 elif (( "$keysfound" > 1 )); then
  67     echo "! More than one core key found?"
  68     # FIXME: recommend a way to resolve this
  69     problemsfound=$(($problemsfound+1))
  70 else
  71     create=$(echo "$seckey" | grep ^sec: | cut -f6 -d:)
  72     expire=$(echo "$seckey" | grep ^sec: | cut -f7 -d:)
  73     fingerprint=$(echo "$seckey" | grep ^fpr: | head -n1 | cut -f10 -d:)
  74     # check for key expiration:
  75     if [ "$expire" ]; then
  76         if (( "$expire"  < "$curdate" )); then
  77             echo "! Core key is expired."
  78             echo " - Recommendation: ???"
  79             problemsfound=$(($problemsfound+1))
  80         elif (( "$expire" < "$warndate" )); then
  81             echo "! Core key expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F)
  82             echo " - Recommendation: ???"
  83             problemsfound=$(($problemsfound+1))
  84         fi
  85     fi
  86
  87     # and weirdnesses:
  88     if [ "$create" ] && (( "$create" > "$curdate" )); then
  89         echo "! Core key was created in the future(?!). Is your clock correct?"
  90         echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?"
  91         problemsfound=$(($problemsfound+1))
  92     fi
  93
  94 fi
  95
  96 # FIXME: look at the ownership/privileges of the various keyrings,
  97 #    directories housing them, etc (what should those values be?  can
  98 #    we make them as minimal as possible?)
  99
 100 # FIXME: look to see that the ownertrust rules are set properly on the
 101 #    sphere keyring
 102
 103 # make sure that at least one identity certifier exists
 104 echo
 105 echo "Checking for Identity Certifiers..."
 106 if ! monkeysphere-authentication list-identity-certifiers | egrep -q '^[A-F0-9]{40}:' then
 107     echo "! No Identity Certifiers found!"
 108     echo " - Recommendation: once you know who should be able to certify identities for
 109      connecting users, you should add their key, with:
 110       monkeysphere-authentication add-identity-certifier"
 111     problemsfound=$(($problemsfound+1))
 112 fi
 113
 114 # FIXME: look at the timestamps on the monkeysphere-generated
 115 # authorized_keys files -- warn if they seem out-of-date.
 116
 117 # FIXME: check for a cronjob that updates monkeysphere-generated
 118 # authorized_keys?
 119
 120 echo
 121 echo "Checking for Monkeysphere-enabled public-key authentication for users ..."
 122 # Ensure that User ID authentication is enabled:
 123 if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$" "$sshd_config"; then
 124     echo "! $sshd_config does not point to monkeysphere authorized keys."
 125     echo " - Recommendation: add a line to $sshd_config: 'AuthorizedKeysFile ${SYSDATADIR}/authorized_keys/%u'"
 126     problemsfound=$(($problemsfound+1))
 127 fi
 128 if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' "$sshd_config" | grep -v "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$") ; then
 129     echo "! $sshd_config refers to non-monkeysphere authorized_keys files:"
 130     echo "$badauthorizedkeys"
 131     echo " - Recommendation: remove the above AuthorizedKeysFile lines from $sshd_config"
 132     problemsfound=$(($problemsfound+1))
 133 fi
 134
 135 if [ "$problemsfound" -gt 0 ]; then
 136     echo "When the above $problemsfound issue"$(if [ "$problemsfound" -eq 1 ] ; then echo " is" ; else echo "s are" ; fi)" resolved, please re-run:"
 137     echo "  monkeysphere-authentication diagnostics"
 138 else
 139     echo "Everything seems to be in order!"
 140 fi
 141
 142 }