-#!/bin/sh
+#!/bin/bash
+
+# monkeysphere: MonkeySphere client tool
+#
+# The monkeysphere scripts are written by:
+# Jameson Rollins <jrollins@fifthhorseman.net>
+#
+# They are Copyright 2008, and are all released under the GPL, version 3
+# or later.
########################################################################
PGRM=$(basename $0)
export SHAREDIR
. "${SHAREDIR}/common"
-GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}"/monkeysphere.conf}
+GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}/monkeysphere.conf"}
[ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG"
# date in UTF format if needed
# unset some environment variables that could screw things up
GREP_OPTIONS=
+# default return code
+ERR=0
+export ERR
+
########################################################################
# FUNCTIONS
########################################################################
usage() {
cat <<EOF
usage: $PGRM <subcommand> [args]
-Monkeysphere client tool.
+MonkeySphere client tool.
subcommands:
- update-known-hosts (k) [HOST]... update known_hosts file
- update-authorized-keys (a) update authorized_keys file
- update-userid (u) [USERID]... add/update userid to
- authorized_user_ids
- help (h,?) this help
+ update-known_hosts (k) [HOST]... update known_hosts file
+ update-authorized_keys (a) update authorized_keys file
+ gen-subkey (g) KEYID generate an 'a' capable subkey
+ help (h,?) this help
EOF
}
+# generate a subkey with the 'a' usage flags set
+# FIXME: this needs some tweaking to clean it up
+gen_subkey(){
+ local keyID
+ local gpgOut
+ local userID
+
+ keyID="$1"
+
+ gpgOut=$(gpg --quiet --fixed-list-mode --list-keys --with-colons \
+ "$keyID" 2> /dev/null)
+
+ # fail if there only "tru" lines are output from gpg, which
+ # indicates the key was not found.
+ if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
+ failure "Key ID '$keyID' not found."
+ fi
+
+ # fail if multiple pub lines are returned, which means the id given
+ # is not unique
+ if [ $(echo "$gpgOut" | grep '^pub:' | wc -l) -gt '1' ] ; then
+ failure "Key ID '$keyID' is not unique."
+ fi
+
+ # prompt if an authentication subkey already exists
+ if echo "$gpgOut" | egrep "^(pub|sub):" | cut -d: -f 12 | grep -q a ; then
+ echo "An authentication subkey already exists for key '$keyID'."
+ read -p "Are you sure you would like to generate another one? [y|N]: " OK; OK=${OK:N}
+ if [ "${OK/y/Y}" != 'Y' ] ; then
+ failure "aborting."
+ fi
+ fi
+
+ # set subkey defaults
+ SUBKEY_TYPE=${SUBKEY_TYPE:-"RSA"}
+ SUBKEY_LENGTH=${SUBKEY_LENGTH:-}
+ SUBKEY_USAGE=${SUBKEY_USAGE:-"auth"}
+ SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
+ cat <<EOF
+Please specify how long the key should be valid.
+ 0 = key does not expire
+ <n> = key expires in n days
+ <n>w = key expires in n weeks
+ <n>m = key expires in n months
+ <n>y = key expires in n years
+EOF
+ read -p "Key is valid for? ($SUBKEY_EXPIRE) " SUBKEY_EXPIRE; SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
+
+ # generate the list of commands that will be passed to edit-key
+ editCommands=$(cat <<EOF
+addkey
+7
+S
+E
+A
+Q
+$SUBKEY_LENGTH
+$SUBKEY_EXPIRE
+save
+EOF
+)
+
+ log "generating subkey..."
+ echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID"
+ log "done."
+}
+
########################################################################
# MAIN
########################################################################
shift
# set ms home directory
-MS_HOME=${MS_HOME:-"$HOME"/.config/monkeysphere}
+MS_HOME=${MS_HOME:-"${HOME}/.config/monkeysphere"}
# load configuration file
-MS_CONF=${MS_CONF:-"$MS_HOME"/monkeysphere.conf}
+MS_CONF=${MS_CONF:-"${MS_HOME}/monkeysphere.conf"}
[ -e "$MS_CONF" ] && . "$MS_CONF"
# set empty config variable with defaults
-AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"$MS_HOME"/authorized_user_ids}
-GNUPGHOME=${GNUPGHOME:-"$HOME"/.gnupg}
-KEYSERVER=${KEYSERVER:-subkeys.pgp.net}
-REQUIRED_KEY_CAPABILITY=${REQUIRED_KEY_CAPABILITY:-"e a"}
-USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-%h/.ssh/authorized_keys}
-USER_KNOWN_HOSTS=${USER_KNOWN_HOSTS:-"$HOME"/.ssh/known_hosts}
-HASH_KNOWN_HOSTS=${HASH_KNOWN_HOSTS:-}
+AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"${MS_HOME}/authorized_user_ids"}
+GNUPGHOME=${GNUPGHOME:-"${HOME}/.gnupg"}
+KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
+CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"}
+REQUIRED_HOST_KEY_CAPABILITY=${REQUIRED_HOST_KEY_CAPABILITY:-"a"}
+REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
+KNOWN_HOSTS=${KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"}
+AUTHORIZED_KEYS=${AUTHORIZED_KEYS:-"${HOME}/.ssh/authorized_keys"}
+HASH_KNOWN_HOSTS=${HASH_KNOWN_HOSTS:-"true"}
export GNUPGHOME
-# stagging locations
-hostKeysCacheDir="$MS_HOME"/host_keys
-userKeysCacheDir="$MS_HOME"/user_keys
-msAuthorizedKeys="$MS_HOME"/authorized_keys
-
# make sure gpg home exists with proper permissions
mkdir -p -m 0700 "$GNUPGHOME"
+# make sure the user monkeysphere home directory exists
+mkdir -p -m 0700 "$MS_HOME"
+touch "$AUTHORIZED_USER_IDS"
+touch "$AUTHORIZED_KEYS"
+
case $COMMAND in
- 'update-known-hosts'|'k')
+ 'update-known_hosts'|'update-known-hosts'|'k')
MODE='known_hosts'
# touch the known_hosts file to make sure it exists
- touch "$USER_KNOWN_HOSTS"
+ # ssh-keygen complains if it doesn't exist
+ touch "$KNOWN_HOSTS"
# if hosts are specified on the command line, process just
# those hosts
if [ "$1" ] ; then
- for host ; do
- process_host "$host" "$hostKeysCacheDir"
- done
+ update_known_hosts "$@" || ERR=1
- # otherwise, if no hosts are specified, process the user
- # known_hosts file
+ # otherwise, if no hosts are specified, process every host
+ # in the user's known_hosts file
else
- if [ ! -s "$USER_KNOWN_HOSTS" ] ; then
- failure "known_hosts file '$USER_KNOWN_HOSTS' is empty."
+ if [ ! -s "$KNOWN_HOSTS" ] ; then
+ failure "known_hosts file '$KNOWN_HOSTS' is empty."
fi
log "processing known_hosts file..."
- process_known_hosts "$USER_KNOWN_HOSTS" "$hostKeysCacheDir"
+ process_known_hosts || ERR=1
fi
+
+ log "known_hosts file updated."
;;
- 'update-authorized-keys'|'a')
+ 'update-authorized_keys'|'update-authorized-keys'|'a')
MODE='authorized_keys'
- log "processing authorized_user_ids file..."
-
- # make sure authorized_user_ids file exists
+ # fail if the authorized_user_ids file is empty
if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
- log "authorized_user_ids file is empty or does not exist."
- exit
+ failure "$AUTHORIZED_USER_IDS is empty."
fi
- process_authorized_ids "$AUTHORIZED_USER_IDS" "$userKeysCacheDir"
-
- # write output key file
- log "writing monkeysphere authorized_keys file... "
- touch "$msAuthorizedKeys"
- if [ "$(ls "$userKeysCacheDir")" ] ; then
- log -n "adding gpg keys... "
- cat "$userKeysCacheDir"/* > "$msAuthorizedKeys"
- echo "done."
- else
- log "no gpg keys to add."
- fi
- if [ "$USER_CONTROLLED_AUTHORIZED_KEYS" ] ; then
- userAuthorizedKeys=${USER_CONTROLLED_AUTHORIZED_KEYS/\%h/"$HOME"}
- if [ -s "$userAuthorizedKeys" ] ; then
- log -n "adding user authorized_keys file... "
- cat "$userAuthorizedKeys" >> "$msAuthorizedKeys"
- echo "done."
- fi
- fi
- log "monkeysphere authorized_keys file generated:"
- log "$msAuthorizedKeys"
+ # process authorized_user_ids file
+ log "processing authorized_user_ids file..."
+ process_authorized_user_ids "$AUTHORIZED_USER_IDS" || ERR=1
+ log "authorized_keys file updated."
;;
- 'update-userid'|'u')
- if [ -z "$1" ] ; then
- failure "you must specify at least one userid."
+ 'gen-subkey'|'g')
+ keyID="$1"
+ if [ -z "$keyID" ] ; then
+ failure "You must specify the key ID of your primary key."
fi
- for userID ; do
- if ! grep -q "^${userID}\$" "$AUTHORIZED_USER_IDS" ; then
- log "userid '$userID' not in authorized_user_ids file."
- continue
- fi
- log "processing user id: '$userID'"
- process_user_id "$userID" "$userKeysCacheDir" > /dev/null
- done
+ gen_subkey "$keyID"
;;
'help'|'h'|'?')
*)
failure "Unknown command: '$COMMAND'
-Type 'cereal-admin help' for usage."
+Type '$PGRM help' for usage."
;;
esac
+
+exit "$ERR"