2 # This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)
4 # Monkeysphere authentication add-certifier subcommand
6 # This function adds a certifier whose signatures will be used to
7 # calculate validity of keys used to connect to user accounts on the
8 # server. The specified certifier key is first retrieved from the Web
9 # of Trust with the monkeysphere-user-controlled gpg_sphere keyring.
10 # Once then new key is retrieved, it is imported into the core
11 # keyring. The gpg_core then ltsigns the key with the desired trust
12 # level, and then the key is exported back to the gpg_sphere keyring.
13 # The gpg_sphere has ultimate owner trust of the core key, so the core
14 # ltsigs on the new certifier key can then be used by gpg_sphere
15 # calculate validity for keys inserted in the authorized_keys file.
17 # This is all to keep the monkeysphere user that connects to the
18 # keyservers from accessing the core secret key.
20 # The monkeysphere scripts are written by:
21 # Jameson Rollins <jrollins@finestructure.net>
22 # Jamie McClelland <jm@mayfirst.org>
23 # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
25 # They are Copyright 2008-2009, and are all released under the GPL,
61 if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
62 failure "Unknown option '$1'.
63 Type '$PGRM help' for usage."
71 if [ -z "$keyID" ] ; then
72 failure "You must specify the key ID of a key to add, or specify a file to read the key from."
74 if [ -f "$keyID" ] ; then
75 log info "Reading key from file '$keyID':"
76 importinfo=$(gpg_sphere "--import" < "$keyID" 2>&1) || failure "could not read key from '$keyID'"
77 # FIXME: if this is tried when the key database is not
78 # up-to-date, i got these errors (using set -x):
80 # ++ su -m monkeysphere -c '\''gpg --import'\''
81 # Warning: using insecure memory!
82 # gpg: key D21739E9: public key "Daniel Kahn Gillmor <dkg@fifthhorseman.net>" imported
83 # gpg: Total number processed: 1
84 # gpg: imported: 1 (RSA: 1)
85 # gpg: can'\''t create `/var/monkeysphere/gnupg-host/pubring.gpg.tmp'\'': Permission denied
86 # gpg: failed to rebuild keyring cache: Permission denied
87 # gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
88 # gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u
89 # gpg: next trustdb check due at 2009-01-10'
90 # + failure 'could not read key from '\''/root/dkg.gpg'\'''
91 # + echo 'could not read key from '\''/root/dkg.gpg'\'''
93 keyID=$(echo "$importinfo" | grep '^gpg: key ' | cut -f2 -d: | cut -f3 -d\ )
94 if [ -z "$keyID" ] || [ $(echo "$keyID" | wc -l) -ne 1 ] ; then
95 failure "There was not exactly one gpg key in the file."
98 # get the key from the key server
99 log debug "retrieving key from keyserver..."
100 gpg_sphere "--keyserver $KEYSERVER --recv-key '0x${keyID}!'" || failure "Could not receive a key with this ID from the '$KEYSERVER' keyserver."
105 # get the full fingerprint of new certifier key
106 log debug "getting fingerprint of certifier key..."
107 fingerprint=$(gpg_sphere "--list-key --with-colons --with-fingerprint 0x${keyID}!" \
108 | grep '^fpr:' | grep "$keyID" | cut -d: -f10)
110 if [ -z "$fingerprint" ] ; then
111 failure "Key '$keyID' not found."
114 log info "key found:"
115 gpg_sphere "--fingerprint 0x${fingerprint}!"
117 if [ "$PROMPT" = true ] ; then
118 echo "Are you sure you want to add the above key as a"
119 read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N}
120 if [ "${OK/y/Y}" != 'Y' ] ; then
121 failure "Identity certifier not added."
124 log debug "adding key without prompting."
127 # export the key to the core keyring so that the core can sign the
129 log debug "exporting retrieved certifier key to core keyring..."
130 gpg_sphere "--export 0x${fingerprint}!" | gpg_core --import
140 failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)."
144 # edit-key script to ltsign key
145 # NOTE: *all* user IDs will be ltsigned
146 ltsignCommand=$(cat <<EOF
157 # core ltsigns the newly imported certifier key
158 log debug "executing core ltsign script..."
159 if echo "$ltsignCommand" | \
160 gpg_core --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
162 # transfer the new sigs back to the sphere keyring
163 gpg_core_sphere_sig_transfer
165 # update the sphere trustdb
166 log debug "updating sphere trustdb..."
167 gpg_sphere "--check-trustdb"
169 log info "Identity certifier added."
171 failure "Problem adding identify certifier."