-#!/bin/sh
+#!/bin/bash
# monkeysphere: MonkeySphere client tool
#
########################################################################
PGRM=$(basename $0)
-SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"}
-export SHAREDIR
-. "${SHAREDIR}/common"
-
-GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}"/monkeysphere.conf}
-[ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG"
+SHARE=${MONKEYSPHERE_SHARE:-"/usr/share/monkeysphere"}
+export SHARE
+. "${SHARE}/common" || exit 1
# date in UTF format if needed
DATE=$(date -u '+%FT%T')
# unset some environment variables that could screw things up
-GREP_OPTIONS=
+unset GREP_OPTIONS
+
+# default return code
+RETURN=0
+
+# set the file creation mask to be only owner rw
+umask 077
########################################################################
# FUNCTIONS
usage() {
cat <<EOF
-usage: $PGRM <subcommand> [args]
-Monkeysphere client tool.
+usage: $PGRM <subcommand> [options] [args]
+MonkeySphere client tool.
subcommands:
- update-known-hosts (k) [HOST]... update known_hosts file
- update-authorized-keys (a) update authorized_keys file
- update-userids (u) [USERID]... add/update userid
- gen-ae-subkey (g) generate an 'ae' capable subkey
+ update-known_hosts (k) [HOST]... update known_hosts file
+ update-authorized_keys (a) update authorized_keys file
+ gen-subkey (g) KEYID generate an 'a' capable subkey
+ -l|--length BITS key length in bits (2048)
+ -e|--expire EXPIRE date to expire
help (h,?) this help
EOF
}
+# generate a subkey with the 'a' usage flags set
+# FIXME: this needs some tweaking to clean it up
+gen_subkey(){
+ local keyLength
+ local keyExpire
+ local keyID
+ local gpgOut
+ local userID
+
+ # set default key parameter values
+ keyLength=
+ keyExpire=
+
+ # get options
+ TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
+
+ if [ $? != 0 ] ; then
+ exit 1
+ fi
+
+ # Note the quotes around `$TEMP': they are essential!
+ eval set -- "$TEMP"
+
+ while true ; do
+ case "$1" in
+ -l|--length)
+ keyLength="$2"
+ shift 2
+ ;;
+ -e|--expire)
+ keyExpire="$2"
+ shift 2
+ ;;
+ --)
+ shift
+ ;;
+ *)
+ break
+ ;;
+ esac
+ done
+
+ keyID="$1"
+ if [ -z "$keyID" ] ; then
+ failure "You must specify the key ID of your primary key."
+ fi
+
+ # get key output, and fail if not found
+ gpgOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons \
+ "$keyID") || failure
+
+ # fail if multiple sec lines are returned, which means the id
+ # given is not unique
+ if [ $(echo "$gpgOut" | grep '^sec:' | wc -l) -gt '1' ] ; then
+ failure "Key ID '$keyID' is not unique."
+ fi
+
+ # prompt if an authentication subkey already exists
+ if echo "$gpgOut" | egrep "^(sec|ssb):" | 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 [ "${OK/y/Y}" != 'Y' ] ; then
+ failure "aborting."
+ fi
+ fi
+
+ # set subkey defaults
+ # prompt about key expiration if not specified
+ if [ -z "$keyExpire" ] ; then
+ 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
+ while [ -z "$keyExpire" ] ; do
+ read -p "Key is valid for? (0) " keyExpire
+ if ! test_gpg_expire ${keyExpire:=0} ; then
+ echo "invalid value"
+ unset keyExpire
+ fi
+ done
+ elif ! test_gpg_expire "$keyExpire" ; then
+ failure "invalid key expiration value '$keyExpire'."
+ fi
+
+ # generate the list of commands that will be passed to edit-key
+ editCommands=$(cat <<EOF
+addkey
+7
+S
+E
+A
+Q
+$keyLength
+$keyExpire
+save
+EOF
+)
+
+ log "generating subkey..."
+ echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID"
+ log "done."
+}
+
########################################################################
# MAIN
########################################################################
-COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
-shift
+# unset variables that should be defined only in config file
+unset KEYSERVER
+unset CHECK_KEYSERVER
+unset KNOWN_HOSTS
+unset HASH_KNOWN_HOSTS
+unset AUTHORIZED_KEYS
-# set ms home directory
-MS_HOME=${MS_HOME:-"$HOME"/.config/monkeysphere}
+# load global config
+[ -r "${ETC}/monkeysphere.conf" ] && . "${ETC}/monkeysphere.conf"
-# load configuration file
-MS_CONF=${MS_CONF:-"$MS_HOME"/monkeysphere.conf}
-[ -e "$MS_CONF" ] && . "$MS_CONF"
+# set monkeysphere home directory
+MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.config/monkeysphere"}
+mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
-# 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:-}
+# load local config
+[ -e ${MONKEYSPHERE_CONFIG:="${MONKEYSPHERE_HOME}/monkeysphere.conf"} ] && . "$MONKEYSPHERE_CONFIG"
-export GNUPGHOME
+# set empty config variables with ones from the environment, or from
+# config file, or with defaults
+GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=${GNUPGHOME:="${HOME}/.gnupg"}}
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
+CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
+KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=${KNOWN_HOSTS:="${HOME}/.ssh/known_hosts"}}
+HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=${HASH_KNOWN_HOSTS:="true"}}
+AUTHORIZED_KEYS=${MONKEYSPHERE_AUTHORIZED_KEYS:=${AUTHORIZED_KEYS:="${HOME}/.ssh/authorized_keys"}}
-# stagging locations
-hostKeysCacheDir="$MS_HOME"/host_keys
-userKeysCacheDir="$MS_HOME"/user_keys
-msAuthorizedKeys="$MS_HOME"/authorized_keys
+# other variables not in config file
+AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:="${MONKEYSPHERE_HOME}/authorized_user_ids"}
+REQUIRED_HOST_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_HOST_KEY_CAPABILITY:="a"}
+REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
-# make sure gpg home exists with proper permissions
+# export GNUPGHOME and make sure gpg home exists with proper
+# permissions
+export GNUPGHOME
mkdir -p -m 0700 "$GNUPGHOME"
+# get subcommand
+COMMAND="$1"
+[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+shift
+
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"
+ if ! check_key_file_permissions "$USER" "$KNOWN_HOSTS" ; then
+ failure "Improper permissions on known_hosts file."
+ fi
# if hosts are specified on the command line, process just
# those hosts
if [ "$1" ] ; then
- for host ; do
- process_host "$host" "$hostKeysCacheDir"
- done
+ update_known_hosts "$@"
+ RETURN="$?"
- # otherwise, if no hosts are specified, process the user
- # known_hosts file
+ # otherwise, if no hosts are specified, process every host
+ # in the user's known_hosts file
else
- if [ ! -s "$USER_KNOWN_HOSTS" ] ; then
- failure "known_hosts file '$USER_KNOWN_HOSTS' is empty."
+ if [ ! -e "$KNOWN_HOSTS" ] ; then
+ failure "known_hosts file '$KNOWN_HOSTS' does not exist."
fi
- log "processing known_hosts file..."
- process_known_hosts "$USER_KNOWN_HOSTS" "$hostKeysCacheDir"
+
+ process_known_hosts
+ RETURN="$?"
fi
;;
- '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
- if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
- log "authorized_user_ids file is empty or does not exist."
- exit
+ # fail if the authorized_user_ids file is empty
+ if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
+ failure "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
fi
- process_authorized_ids "$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
+ if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
+ failure "Improper permissions on authorized_user_ids file."
fi
- log "monkeysphere authorized_keys file generated:"
- log "$msAuthorizedKeys"
- ;;
- 'update-userids'|'u')
- if [ -z "$1" ] ; then
- failure "you must specify at least one userid."
- fi
- for userID ; do
- update_userid "$userID" "$userKeysCacheDir"
- done
+ # process authorized_user_ids file
+ process_authorized_user_ids "$AUTHORIZED_USER_IDS"
+ RETURN="$?"
;;
- 'gen-ae-subkey'|)
- failure "function not implemented yet."
+ 'gen-subkey'|'g')
+ gen_subkey "$@"
;;
'help'|'h'|'?')
*)
failure "Unknown command: '$COMMAND'
-Type 'cereal-admin help' for usage."
+Type '$PGRM help' for usage."
;;
esac
+
+exit "$RETURN"
projects / monkeysphere.git / blobdiff