+size_t kwbimage_header_size(unsigned char *ptr)
+{
+ if (image_version((void *)ptr) == 0)
+ return sizeof(struct main_hdr_v0);
+ else
+ return KWBHEADER_V1_SIZE((struct main_hdr_v1 *)ptr);
+}
+
+/*
+ * Verify checksum over a complete header that includes the checksum field.
+ * Return 1 when OK, otherwise 0.
+ */
+static int main_hdr_checksum_ok(void *hdr)
+{
+ /* Offsets of checksum in v0 and v1 headers are the same */
+ struct main_hdr_v0 *main_hdr = (struct main_hdr_v0 *)hdr;
+ uint8_t checksum;
+
+ checksum = image_checksum8(hdr, kwbimage_header_size(hdr));
+ /* Calculated checksum includes the header checksum field. Compensate
+ * for that.
+ */
+ checksum -= main_hdr->checksum;
+
+ return checksum == main_hdr->checksum;
+}
+