Index: encrypt_hook
===================================================================
--- encrypt_hook	(revision 155993)
+++ encrypt_hook	(working copy)
@@ -101,7 +101,7 @@
             elif [ -n "${crypto}" ]; then
                 [ ${DEPRECATED_CRYPT} -eq 1 ] && warn_deprecated
                 msg "Non-LUKS encrypted device found..."
-                if [ $# -ne 5 ]; then
+                if echo "$crypto" | awk -F: '{ exit(NF == 5) }'; then
                     err "Verify parameter format: crypto=hash:cipher:keysize:offset:skip"
                     err "Non-LUKS decryption not attempted..."
                     return 1