Add new ECDSA256 flags to design
diff --git a/boot/bootutil/design.txt b/boot/bootutil/design.txt
index bfa12d2..5d25ec1 100644
--- a/boot/bootutil/design.txt
+++ b/boot/bootutil/design.txt
@@ -84,13 +84,15 @@
#define IMAGE_F_PKCS15_RSA2048_SHA256 0x00000004 /* PKCS15 w/RSA and SHA */
#define IMAGE_F_ECDSA224_SHA256 0x00000008 /* ECDSA256 over SHA256 */
#define IMAGE_F_NON_BOOTABLE 0x00000010 /* Split image app. */
+#define IMAGE_F_ECDSA256_SHA256 0x00000020 /* ECDSA256 over SHA256 */
/*
* Image trailer TLV types.
*/
-#define IMAGE_TLV_SHA256 1 /* SHA256 of image hdr and body */
-#define IMAGE_TLV_RSA2048 2 /* RSA2048 of hash output */
+#define IMAGE_TLV_SHA256 1 /* SHA256 of image hdr and body */
+#define IMAGE_TLV_RSA2048 2 /* RSA2048 of hash output */
#define IMAGE_TLV_ECDSA224 3 /* ECDSA of hash output */
+#define IMAGE_TLV_ECDSA256 4 /* ECDSA of hash output */
Optional type-length-value records (TLVs) containing image metadata are placed
after the end of the image.