diff --git a/sh/cryptsetup.sh b/sh/cryptsetup.sh
index b7da532..a2d5c8b 100644
--- a/sh/cryptsetup.sh
+++ b/sh/cryptsetup.sh
@@ -2,9 +2,30 @@ _rwx_cmd_cs() { rwx_crypt "${@}"; }
 
 RWX_CRYPT_ROOT="${HOME}/home/crypt"
 
+rwx_crypt_device() {
+	local device size
+	local index=0
+	while [ -z "${device}" ]; do
+		device="/dev/nbd${index}"
+		if [ -b "${device}" ]; then
+			size="$(cat /sys/block/nbd"${index}/size")"
+			[ "${size}" -eq 0 ] ||
+				device=""
+		else
+			device=""
+			break
+		fi
+		index=$((index + 1))
+	done
+	if [ -n "${device}" ]; then
+		echo "${device}"
+	else
+		rwx_log_error 1 "No device available"
+	fi
+}
+
 rwx_crypt() {
 	local action="${1}"
-	shift
 	local action_close="close"
 	local action_open="open"
 	local mapper="/dev/mapper"
@@ -12,6 +33,7 @@ rwx_crypt() {
 	local crypt_arg crypt_file crypt_map crypt_mount pass_phrase
 	case "${action}" in
 	"${action_close}" | "${action_open}")
+		shift
 		local user_id
 		user_id="$(id --user)"
 		[ "${user_id}" -eq 0 ] ||
@@ -22,34 +44,20 @@ rwx_crypt() {
 			pass_phrase="$(rwx_read_passphrase)"
 		for crypt_arg in "${@}"; do
 			rwx_log_info
-			crypt_file="${RWX_CRYPT_ROOT}/${crypt_arg}"
+			crypt_file="${RWX_CRYPT_ROOT}/${crypt_arg}.qcow2"
 			if [ -f "${crypt_file}" ]; then
 				crypt_map="${mapper}/${crypt_arg}"
 				crypt_mount="${mount_root}/${crypt_arg}"
 				case "${action}" in
 				"${action_open}")
-					rwx_log_info "OPEN"
-					local nbd_device nbd_size
-					local nbd_index=0
-					while [ -z "${nbd_device}" ]; do
-						if [ -f "/dev/nbd${nbd_index}" ]; then
-							nbd_size="$(cat /sys/block/nbd"${nbd_index}/size")"
-							[ "${nbd_size}" -eq 0 ] &&
-								nbd_device="/dev/nbd${nbd_index}"
-						fi
-						nbd_index=$((nbd_index + 1))
-					done
-					[ -z "${nbd_device}" ] &&
-						rwx_log_error 4 "No device available"
-					rwx_log_info "device: ${nbd_device}"
+					local nbd_device="$(rwx_crypt_device)"
+					echo "device: ${nbd_device}"
 					# TODO connect device
 					# TODO open device
-					echo "${pass_phrase}"
 					# TODO make mount directory
 					# TODO mount file system
 					;;
 				"${action_close}")
-					rwx_log_info "CLOSE"
 					# TODO unmount file system
 					# TODO remove mount directory
 					# TODO close device