#!/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 $0) SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"} export SHAREDIR . "${SHAREDIR}/common" GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}/monkeysphere.conf"} [ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG" # date in UTF format if needed DATE=$(date -u '+%FT%T') # unset some environment variables that could screw things up GREP_OPTIONS= ######################################################################## # FUNCTIONS ######################################################################## usage() { cat <<EOF usage: $PGRM <subcommand> [args] MonkeySphere client tool. subcommands: update-known_hosts (k) [HOST]... update known_hosts file update-userids (u) [USERID]... add/update user IDs remove-userids (r) [USERID]... remove user IDs 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 --fixed-list-mode --list-keys --with-colons \ "$keyID" 2> /dev/null) # return 1 if there only "tru" lines are output from gpg if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then failure "Key ID '$keyID' not found." fi # set subkey defaults SUBKEY_TYPE=${SUBKEY_TYPE:-"RSA"} #SUBKEY_LENGTH=${SUBKEY_LENGTH:-"2048"} 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 $SUBKEY_EXPIRE save EOF ) echo "generating subkey..." echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID" } ######################################################################## # MAIN ######################################################################## COMMAND="$1" [ "$COMMAND" ] || failure "Type '$PGRM help' for usage." shift # set ms home directory MS_HOME=${MS_HOME:-"${HOME}/.config/monkeysphere"} # load configuration file MS_CONF=${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"} CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"} REQUIRED_HOST_KEY_CAPABILITY=${REQUIRED_HOST_KEY_CAPABILITY:-"e a"} REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"} USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-"${HOME}/.ssh/authorized_keys"} USER_KNOWN_HOSTS=${USER_KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"} HASH_KNOWN_HOSTS=${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 "$MS_HOME" mkdir -p "$hostKeysCacheDir" mkdir -p "$userKeysCacheDir" touch "$AUTHORIZED_USER_IDS" case $COMMAND in 'update-known_hosts'|'update-known-hosts'|'k') MODE='known_hosts' # touch the known_hosts file to make sure it exists # ssh-keygen complains if it doesn't exist touch "$USER_KNOWN_HOSTS" # if hosts are specified on the command line, process just # those hosts if [ "$1" ] ; then for host ; do process_host "$host" done # otherwise, if no hosts are specified, process every user # in the user's known_hosts file else if [ ! -s "$USER_KNOWN_HOSTS" ] ; then failure "known_hosts file '$USER_KNOWN_HOSTS' is empty." fi log "processing known_hosts file..." process_known_hosts fi ;; 'update-userids'|'update-userid'|'u') if [ -z "$1" ] ; then failure "you must specify at least one userid." fi for userID ; do update_userid "$userID" done log "Run the following to update your monkeysphere authorized_keys file:" log "$PGRM update-authorized_keys" ;; 'remove-userids'|'remove-userid'|'r') if [ -z "$1" ] ; then failure "you must specify at least one userid." fi for userID ; do remove_userid "$userID" done log "Run the following to update your monkeysphere authorized_keys file:" log "$PGRM update-authorized_keys" ;; 'update-authorized_keys'|'update-authorized-keys'|'a') MODE='authorized_keys' # fail if the authorized_user_ids file is empty if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then failure "$AUTHORIZED_USER_IDS is empty." fi # update authorized_keys update_authorized_keys "$msAuthorizedKeys" "$USER_CONTROLLED_AUTHORIZED_KEYS" "$userKeysCacheDir" ;; 'gen-subkey'|'g') keyID="$1" if [ -z "$keyID" ] ; then failure "You must specify the key ID of your primary key." fi gen_subkey "$keyID" ;; 'help'|'h'|'?') usage ;; *) failure "Unknown command: '$COMMAND' Type '$PGRM help' for usage." ;; esac