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,
55 if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
56 failure "Unknown option '$1'.
57 Type '$PGRM help' for usage."
65 if [ -z "$keyID" ] ; then
66 failure "You must specify the key ID of a key to add, or specify a file to read the key from."
68 if [ -f "$keyID" ] ; then
69 log info "Reading key from file '$keyID':"
70 importinfo=$(gpg_sphere "--import" < "$keyID" 2>&1) || failure "could not read key from '$keyID'"
71 # FIXME: if this is tried when the key database is not
72 # up-to-date, i got these errors (using set -x):
74 # ++ su -m monkeysphere -c '\''gpg --import'\''
75 # Warning: using insecure memory!
76 # gpg: key D21739E9: public key "Daniel Kahn Gillmor <dkg@fifthhorseman.net>" imported
77 # gpg: Total number processed: 1
78 # gpg: imported: 1 (RSA: 1)
79 # gpg: can'\''t create `/var/monkeysphere/gnupg-host/pubring.gpg.tmp'\'': Permission denied
80 # gpg: failed to rebuild keyring cache: Permission denied
81 # gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
82 # gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u
83 # gpg: next trustdb check due at 2009-01-10'
84 # + failure 'could not read key from '\''/root/dkg.gpg'\'''
85 # + echo 'could not read key from '\''/root/dkg.gpg'\'''
87 keyID=$(echo "$importinfo" | grep '^gpg: key ' | cut -f2 -d: | cut -f3 -d\ ) || \
88 failure "There were no gpg keys in the file $keyID."
89 if [ -z "$keyID" ] || [ $(echo "$keyID" | wc -l) -ne 1 ] ; then
90 failure "There was not exactly one gpg key in the file."
93 # get the key from the key server
94 log debug "retrieving key from keyserver..."
95 gpg_sphere "--keyserver $KEYSERVER --recv-key '0x${keyID}!'" || failure "Could not receive a key with this ID from the '$KEYSERVER' keyserver."
100 # get the full fingerprint of new certifier key
101 log debug "getting fingerprint of certifier key..."
102 fingerprint=$(gpg_sphere "--list-key --with-colons --with-fingerprint 0x${keyID}!" \
103 | grep '^fpr:' | grep "$keyID" | cut -d: -f10)
105 if [ -z "$fingerprint" ] ; then
106 failure "Key '$keyID' not found."
109 log info "key found:"
110 gpg_sphere "--fingerprint 0x${fingerprint}!"
112 if [ "$PROMPT" = "true" ] ; then
113 echo "Are you sure you want to add the above key as a"
114 read -p "certifier of users on this system? (Y/n) " OK; OK=${OK:-Y}
115 if [ "${OK/y/Y}" != 'Y' ] ; then
116 failure "Identity certifier not added."
119 log debug "adding key without prompting."
122 # export the key to the core keyring so that the core can sign the
124 log debug "exporting retrieved certifier key to core keyring..."
125 gpg_sphere "--export 0x${fingerprint}!" | gpg_core --import
135 failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)."
139 # edit-key script to ltsign key
140 # NOTE: *all* user IDs will be ltsigned
141 ltsignCommand=$(cat <<EOF
152 # core ltsigns the newly imported certifier key
153 log debug "executing core ltsign script..."
154 if echo "$ltsignCommand" | \
155 gpg_core --command-fd 0 --edit-key "0x${fingerprint}!" ; then
157 # transfer the new sigs back to the sphere keyring
158 gpg_core_sphere_sig_transfer
160 # update the sphere trustdb
161 log debug "updating sphere trustdb..."
162 gpg_sphere "--check-trustdb"
164 log info "Identity certifier added."
166 failure "Problem adding identify certifier."