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- #!/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 $0)
- SHARE=${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
- 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: $PGRM <subcommand> [options] [args]
- MonkeySphere client tool.
- subcommands:
- update-known_hosts (k) [HOST]... update known_hosts file
- update-authorized_keys (a) update authorized_keys file
- gen-subkey (g) KEYID generate an 'a' capable subkey
- -l|--length BITS key length in bits (2048)
- -e|--expire EXPIRE date to expire
- help (h,?) this help
- EOF
- }
- # generate a subkey with the 'a' usage flags set
- # FIXME: this needs some tweaking to clean it up
- gen_subkey(){
- local keyLength
- local keyExpire
- local keyID
- local gpgOut
- local userID
- # set default key parameter values
- keyLength=
- keyExpire=
- # get options
- TEMP=$(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
- if [ -z "$1" ] ; then
- # find all secret keys
- keyID=$(gpg --with-colons --list-secret-keys | grep ^sec | cut -f5 -d:)
- # if multiple sec keys exist, fail
- if (( $(echo "$keyID" | wc -l) > 1 )) ; then
- echo "Multiple secret keys found:"
- echo "$keyID"
- failure "Please specify which primary key to use."
- fi
- else
- keyID="$1"
- fi
- # get key output, and fail if not found
- gpgOut=$(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 "$keyID"
- log "done."
- }
- ########################################################################
- # MAIN
- ########################################################################
- # unset variables that should be defined only in config file
- unset KEYSERVER
- unset CHECK_KEYSERVER
- unset KNOWN_HOSTS
- unset HASH_KNOWN_HOSTS
- unset AUTHORIZED_KEYS
- # load global config
- [ -r "${ETC}/monkeysphere.conf" ] && . "${ETC}/monkeysphere.conf"
- # set monkeysphere home directory
- MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.config/monkeysphere"}
- mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
- # load local config
- [ -e ${MONKEYSPHERE_CONFIG:="${MONKEYSPHERE_HOME}/monkeysphere.conf"} ] && . "$MONKEYSPHERE_CONFIG"
- # set empty config variables with ones from the environment, or from
- # config file, or with defaults
- GNUPGHOME=${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"}}
- # 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"}
- # 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 $COMMAND in
- 'update-known_hosts'|'update-known-hosts'|'k')
- MODE='known_hosts'
- # check permissions on the known_hosts file path
- if ! check_key_file_permissions "$USER" "$KNOWN_HOSTS" ; then
- failure "Improper permissions on known_hosts file path."
- fi
- # if hosts are specified on the command line, process just
- # those hosts
- if [ "$1" ] ; then
- update_known_hosts "$@"
- RETURN="$?"
- # otherwise, if no hosts are specified, process every host
- # in the user's known_hosts file
- else
- # exit if the known_hosts file does not exist
- if [ ! -e "$KNOWN_HOSTS" ] ; then
- log "known_hosts file '$KNOWN_HOSTS' does not exist."
- exit
- fi
- process_known_hosts
- RETURN="$?"
- fi
- ;;
- 'update-authorized_keys'|'update-authorized-keys'|'a')
- MODE='authorized_keys'
- # check permissions on the authorized_user_ids file path
- if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
- failure "Improper permissions on authorized_user_ids file path."
- fi
- # check permissions on the authorized_keys file path
- if ! check_key_file_permissions "$USER" "$AUTHORIZED_KEYS" ; then
- failure "Improper permissions on authorized_keys file path."
- fi
- # exit if the authorized_user_ids file is empty
- if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
- log "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
- exit
- fi
- # process authorized_user_ids file
- process_authorized_user_ids "$AUTHORIZED_USER_IDS"
- RETURN="$?"
- ;;
- 'gen-subkey'|'g')
- gen_subkey "$@"
- ;;
- 'help'|'h'|'?')
- usage
- ;;
- *)
- failure "Unknown command: '$COMMAND'
- Type '$PGRM help' for usage."
- ;;
- esac
- exit "$RETURN"
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