Fixed MacOS compatibility + python3 requirement

Author: danielinux

Makefile

@@ -151,14 +151,14 @@ test-app/image.bin:
 include tools/test.mk
 
 ed25519.der:
-	@tools/keytools/keygen.py $(KEYGEN_OPTIONS) src/ed25519_pub_key.c
+	@python3 tools/keytools/keygen.py $(KEYGEN_OPTIONS) src/ed25519_pub_key.c
 
 ecc256.der:
-	@tools/keytools/keygen.py $(KEYGEN_OPTIONS) src/ecc256_pub_key.c
+	@python3 tools/keytools/keygen.py $(KEYGEN_OPTIONS) src/ecc256_pub_key.c
 
 factory.bin: $(BOOT_IMG) wolfboot-align.bin $(PRIVATE_KEY)
 	@echo "\t[SIGN] $(BOOT_IMG)"
-	$(Q)tools/keytools/sign.py $(SIGN_OPTIONS) $(BOOT_IMG) $(PRIVATE_KEY) 1
+	$(Q)python3 tools/keytools/sign.py $(SIGN_OPTIONS) $(BOOT_IMG) $(PRIVATE_KEY) 1
 	@echo "\t[MERGE] $@"
 	@cat wolfboot-align.bin test-app/image_v1_signed.bin > $@
 

README.md

@@ -21,8 +21,7 @@ projects to provide a secure firmware update mechanism.
 
 This repository contains the following components:
    - the wolfBoot bootloader
-   - Ed25519 key generator and image signing tools
-   - Ecc256 key generator and image signing tools
+   - key generator and image signing tools (requires python 3.x)
    - Baremetal test applications 
 
 ### wolfBoot bootloader

lib/wolfssl

@@ -43,7 +43,7 @@ test-spi-off: FORCE
 
 test-update: test-app/image.bin FORCE
 	@dd if=/dev/zero bs=131067 count=1 2>/dev/null | tr "\000" "\377" > test-update.bin
-	@$(SIGN_TOOL) test-app/image.bin $(PRIVATE_KEY) $(TEST_UPDATE_VERSION)
+	@python3 $(SIGN_TOOL) test-app/image.bin $(PRIVATE_KEY) $(TEST_UPDATE_VERSION)
 	@dd if=test-app/image_v$(TEST_UPDATE_VERSION)_signed.bin of=test-update.bin bs=1 conv=notrunc
 	@printf "pBOOT" >> test-update.bin
 	@make test-reset
@@ -53,7 +53,7 @@ test-update: test-app/image.bin FORCE
 		(make test-reset && sleep 1 && st-flash --reset write test-update.bin 0x08040000)
 
 test-update-ext: test-app/image.bin FORCE
-	@$(SIGN_TOOL) test-app/image.bin $(PRIVATE_KEY) $(TEST_UPDATE_VERSION)
+	@python3 $(SIGN_TOOL) test-app/image.bin $(PRIVATE_KEY) $(TEST_UPDATE_VERSION)
 	@$$(dd if=/dev/zero bs=1M count=1 | tr '\000' '\377' > test-update.rom)
 	@dd if=test-app/image_v$(TEST_UPDATE_VERSION)_signed.bin of=test-update.rom bs=1 count=524283 conv=notrunc
 	@printf "pBOOT" | dd of=test-update.rom obs=1 seek=524283 count=5 conv=notrunc