3 # monkeysphere: Monkeysphere client tool
5 # The monkeysphere scripts are written by:
6 # Jameson Rollins <jrollins@fifthhorseman.net>
7 # Jamie McClelland <jm@mayfirst.org>
8 # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
9 # Micah Anderson <micah@riseup.net>
11 # They are Copyright 2008-2009, and are all released under the GPL, version 3
14 ########################################################################
17 SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
19 . "${SYSSHAREDIR}/common" || exit 1
21 # sharedir for host functions
22 MSHAREDIR="${SYSSHAREDIR}/m"
24 # UTC date in ISO 8601 format if needed
25 DATE=$(date -u '+%FT%T')
27 # unset some environment variables that could screw things up
33 # set the file creation mask to be only owner rw
36 ########################################################################
38 ########################################################################
42 usage: $PGRM <subcommand> [options] [args]
43 Monkeysphere client tool.
46 update-known_hosts (k) [HOST]... update known_hosts file
47 update-authorized_keys (a) update authorized_keys file
48 import-subkey (i) FILE [KEYID] import existing ssh key as gpg subkey
49 gen-subkey (g) [KEYID] generate an authentication subkey
50 --length (-l) BITS key length in bits (2048)
51 ssh-proxycommand monkeysphere ssh ProxyCommand
52 subkey-to-ssh-agent (s) store authentication subkey in ssh-agent
53 version (v) show version number
59 # take a secret key ID and check that only zero or one ID is provided,
60 # and that it corresponds to only a single secret key ID
61 check_gpg_sec_key_id() {
66 gpgSecOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons 2>/dev/null | egrep '^sec:')
69 gpgSecOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons "$keyID" | egrep '^sec:') || failure
72 failure "You must specify only a single primary key ID."
76 # check that only a single secret key was found
77 case $(echo "$gpgSecOut" | grep -c '^sec:') in
79 failure "No secret keys found. Create an OpenPGP key with the following command:
83 echo "$gpgSecOut" | cut -d: -f5
86 echo "Multiple primary secret keys found:" | log error
87 echo "$gpgSecOut" | cut -d: -f5 | log error
88 echo "Please specify which primary key to use." | log error
94 # check that a valid authentication subkey does not already exist
95 check_gpg_authentication_subkey() {
105 # check that a valid authentication key does not already exist
107 for line in $(gpg --quiet --fixed-list-mode --list-keys --with-colons "$keyID") ; do
108 type=$(echo "$line" | cut -d: -f1)
109 validity=$(echo "$line" | cut -d: -f2)
110 usage=$(echo "$line" | cut -d: -f12)
113 if [ "$type" != 'pub' -a "$type" != 'sub' ] ; then
116 # check for authentication capability
117 if ! check_capability "$usage" 'a' ; then
120 # if authentication key is valid, prompt to continue
121 if [ "$validity" = 'u' ] ; then
122 log error "A valid authentication key already exists for primary key '$keyID'."
123 if [ "$PROMPT" = "true" ] ; then
124 read -p "Are you sure you would like to generate another one? (y/N) " OK; OK=${OK:N}
125 if [ "${OK/y/Y}" != 'Y' ] ; then
136 ########################################################################
138 ########################################################################
140 # set unset default variables
141 GNUPGHOME=${GNUPGHOME:="${HOME}/.gnupg"}
142 KNOWN_HOSTS="${HOME}/.ssh/known_hosts"
143 HASH_KNOWN_HOSTS="true"
144 AUTHORIZED_KEYS="${HOME}/.ssh/authorized_keys"
146 # unset the check keyserver variable, since that needs to have
147 # different defaults for the different functions
148 unset CHECK_KEYSERVER
151 [ -r "${SYSCONFIGDIR}/monkeysphere.conf" ] \
152 && . "${SYSCONFIGDIR}/monkeysphere.conf"
154 # set monkeysphere home directory
155 MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.monkeysphere"}
156 mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
159 [ -e ${MONKEYSPHERE_CONFIG:="${MONKEYSPHERE_HOME}/monkeysphere.conf"} ] \
160 && . "$MONKEYSPHERE_CONFIG"
162 # set empty config variables with ones from the environment
163 GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=$GNUPGHOME}
164 LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=$LOG_LEVEL}
165 KEYSERVER=${MONKEYSPHERE_KEYSERVER:=$KEYSERVER}
166 # if keyserver not specified in env or conf, then look in gpg.conf
167 if [ -z "$KEYSERVER" ] ; then
168 if [ -f "${GNUPGHOME}/gpg.conf" ] ; then
169 KEYSERVER=$(grep -e "^[[:space:]]*keyserver " "${GNUPGHOME}/gpg.conf" | tail -1 | awk '{ print $2 }')
172 PROMPT=${MONKEYSPHERE_PROMPT:=$PROMPT}
173 KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=$KNOWN_HOSTS}
174 HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=$HASH_KNOWN_HOSTS}
175 AUTHORIZED_KEYS=${MONKEYSPHERE_AUTHORIZED_KEYS:=$AUTHORIZED_KEYS}
177 # other variables not in config file
178 AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:="${MONKEYSPHERE_HOME}/authorized_user_ids"}
179 REQUIRED_HOST_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_HOST_KEY_CAPABILITY:="a"}
180 REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
182 # export GNUPGHOME and make sure gpg home exists with proper
185 mkdir -p -m 0700 "$GNUPGHOME"
190 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
194 'update-known_hosts'|'update-known-hosts'|'k')
195 # whether or not to check keyservers
196 CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
198 # if hosts are specified on the command line, process just
201 update_known_hosts "$@"
204 # otherwise, if no hosts are specified, process every host
205 # in the user's known_hosts file
212 'update-authorized_keys'|'update-authorized-keys'|'a')
213 # whether or not to check keyservers
214 CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
216 # process authorized_user_ids file
217 process_authorized_user_ids "$AUTHORIZED_USER_IDS"
222 source "${MSHAREDIR}/import_subkey"
227 source "${MSHAREDIR}/gen_subkey"
231 'ssh-proxycommand'|'p')
232 source "${MSHAREDIR}/ssh_proxycommand"
233 ssh_proxycommand "$@"
236 'subkey-to-ssh-agent'|'s')
237 source "${MSHAREDIR}/subkey_to_ssh_agent"
238 subkey_to_ssh_agent "$@"
245 '--help'|'help'|'-h'|'h'|'?')
250 failure "Unknown command: '$COMMAND'
251 Type '$PGRM help' for usage."