Update mechanism implemented, ed25519 signing tool changed

Author: danielinux

Makefile

@@ -88,7 +88,6 @@ tools/ed25519/ed25519_sign:
 ed25519.der: tools/ed25519/ed25519_sign
 	tools/ed25519/ed25519_keygen src/ed25519_pub_key.c
 
-
 factory.bin: $(BOOT_IMG) wolfboot-align.bin tools/ed25519/ed25519_sign ed25519.der
 	tools/ed25519/ed25519_sign $(BOOT_IMG) ed25519.der 1
 	cat wolfboot-align.bin $(BOOT_IMG).v1.signed > $@

include/image.h

@@ -0,0 +1,59 @@
+#ifndef IMAGE_H
+#define IMAGE_H
+#include <stdint.h>
+#include <target.h>
+
+#define IMAGE_HEADER_SIZE 256
+#define IMAGE_HEADER_OFFSET (2 * sizeof(uint32_t))
+
+#define WOLFBOOT_MAGIC          0x464C4F57 /* WOLF */
+#define WOLFBOOT_MAGIC_TRAIL    0x544F4F42 /* BOOT */
+
+#define HDR_END         0x00
+#define HDR_VERSION     0x01
+#define HDR_TIMESTAMP   0x02
+#define HDR_SHA256      0x03
+#define HDR_PUBKEY      0x10
+#define HDR_SIGNATURE   0x20
+#define HDR_PADDING     0xFF
+
+#define PART_BOOT   0
+#define PART_UPDATE 1
+#define PART_SWAP   2
+
+#define IMG_STATE_NEW 0xFF
+#define IMG_STATE_UPDATING 0x70
+#define IMG_STATE_TESTING 0x10
+#define IMG_STATE_SUCCESS 0x00
+
+#define SECT_FLAG_NEW 0x0F
+#define SECT_FLAG_SWAPPING 0x07
+#define SECT_FLAG_BACKUP 0x03
+#define SECT_FLAG_UPDATED 0x00
+
+
+struct wolfBoot_image {
+    uint8_t *hdr;
+    uint8_t *trailer;
+    int hdr_ok;
+    int signature_ok;
+    int sha_ok;
+    uint8_t *fw_base;
+    uint32_t fw_size;
+    uint8_t part;
+};
+
+
+int wolfBoot_open_image(struct wolfBoot_image *img, uint8_t part);
+int wolfBoot_verify_integrity(struct wolfBoot_image *img);
+int wolfBoot_verify_authenticity(struct wolfBoot_image *img);
+int wolfBoot_set_partition_state(uint8_t part, uint8_t newst);
+int wolfBoot_set_sector_flag(uint8_t part, uint8_t sector, uint8_t newflag);
+int wolfBoot_get_partition_state(uint8_t part, uint8_t *st);
+int wolfBoot_get_sector_flag(uint8_t part, uint8_t sector, uint8_t *flag);
+int wolfBoot_copy(uint32_t src, uint32_t dst, uint32_t size);
+void wolfBoot_erase_partition(uint8_t part);
+void wolfBoot_update_trigger(void);
+void wolfBoot_success(void);
+
+#endif /* IMAGE_H */

include/loader.h

@@ -0,0 +1,21 @@
+#ifndef LOADER_H
+#define LOADER_H
+
+#if defined(WOLFBOOT_SIGN_EC256)
+    extern const unsigned char ecdsa_pub_key[];
+    extern unsigned int ecdsa_pub_key_len;
+#   define KEY_BUFFER  ecdsa_pub_key
+#   define KEY_LEN     ecdsa_pub_key_len
+#   define IMAGE_SIGNATURE_SIZE (72)
+#elif defined(WOLFBOOT_SIGN_ED25519)
+    extern const unsigned char ed25519_pub_key[];
+    extern unsigned int ed25519_pub_key_len;
+#   define KEY_BUFFER  ed25519_pub_key
+#   define KEY_LEN     ed25519_pub_key_len
+#   define IMAGE_SIGNATURE_SIZE (64)
+#else
+#   error "No public key available for given signing algorithm."
+#endif /* Algorithm selection */
+
+
+#endif /* LOADER_H */