From 35f875eb6cd80f057c5dba0d811a8b957bb95e1d Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec@42.org>
Date: Thu, 11 Aug 2011 10:16:55 +0200
Subject: [PATCH] add support for crypting l0dables in Makefile

---
 firmware/l0dable/Makefile | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/firmware/l0dable/Makefile b/firmware/l0dable/Makefile
index 121c4f5..dfffde4 100644
--- a/firmware/l0dable/Makefile
+++ b/firmware/l0dable/Makefile
@@ -24,9 +24,13 @@ LDSRCFILE=ram.ld
 LDFILE=loadable.ld
 CFLAGS+=-mlong-calls -fno-toplevel-reorder
 
-CRYPT=cp
+DOCRYPT=0
+CRYPT=../../tools/crypto/xxtea
 CRYPTFLAGS=-p
 
+skey=`cd .. && ./getkey.pl l0dable_sign`
+ekey=`cd .. && ./getkey.pl l0dable_crypt`
+
 all: $(OBJS) $(ELFS) $(BINS) $(CODS) $(NIKS) 1boot.int debug.int
 
 $(LDFILE):
@@ -47,7 +51,13 @@ $(LDFILE):
 	$(OBJCOPY) $(OCFLAGS) -O binary $< $@
 
 %.c0d: %.bin
-	$(CRYPT) $(CRYPTFLAGS) $< $@
+ifeq "$(DOCRYPT)" "1"
+	$(CRYPT) -e -k $(ekey) -o $<.tmp $<
+	$(CRYPT) -s -k $(skey) -o $@ $<.tmp
+	rm -f $<.tmp
+else
+	cp $< $@
+endif
 
 %.nik: .PHONY
 	@a=$@;a=nick_$${a%.nik}.c0d;echo mv $$a $@;mv $$a $@