# unset some environment variables that could screw things up
GREP_OPTIONS=
+# default return code
+ERR=0
+export ERR
+
########################################################################
# FUNCTIONS
########################################################################
gpgOut=$(gpg --quiet --fixed-list-mode --list-keys --with-colons \
"$keyID" 2> /dev/null)
- # return 1 if there only "tru" lines are output from gpg
+ # 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=${SUBKEY_LENGTH:-"2048"}
+ SUBKEY_LENGTH=${SUBKEY_LENGTH:-}
SUBKEY_USAGE=${SUBKEY_USAGE:-"auth"}
SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
cat <<EOF
# if hosts are specified on the command line, process just
# those hosts
if [ "$1" ] ; then
- process_hosts_known_hosts "$@"
+ update_known_hosts "$@" || ERR=1
# otherwise, if no hosts are specified, process every host
# in the user's known_hosts file
failure "known_hosts file '$KNOWN_HOSTS' is empty."
fi
log "processing known_hosts file..."
- process_known_hosts
+ process_known_hosts || ERR=1
fi
log "known_hosts file updated."
# process authorized_user_ids file
log "processing authorized_user_ids file..."
- process_authorized_user_ids "$AUTHORIZED_USER_IDS"
+ process_authorized_user_ids "$AUTHORIZED_USER_IDS" || ERR=1
log "authorized_keys file updated."
;;
Type '$PGRM help' for usage."
;;
esac
+
+exit "$ERR"