Change kernel vboot header layout and add support for separate header verification.

src/platform/vboot_reference/tests/test_common.c

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Common functions used by tests.
  */
 
 #include "test_common.h"
 
 #include <stdio.h>
@@ skipping 142 matching lines @@
          RSAProcessedKeySize(image->kernel_sign_algorithm));
 
   /* Update correct header length. */
   image->header_len = GetKernelHeaderLen(image);
 
   /* Calculate SHA-512 digest on header and populate header_checksum. */
   CalculateKernelHeaderChecksum(image, image->header_checksum);
 
   /* Populate kernel options and data with dummy data. */
   image->kernel_version = kernel_version;
-  Memset(image->kernel_config, 0, sizeof(image->kernel_config));
+  image->bootloader_offset = 0;
+  image->bootloader_size = 512;
+  image->padded_header_size = 100;
   image->kernel_len = kernel_len;
   image->kernel_key_signature = image->kernel_signature = NULL;
   image->kernel_data = Malloc(kernel_len);
   Memset(image->kernel_data, kernel_data_fill_char, kernel_len);
 
   /* Generate and populate signatures. */
   if (!AddKernelKeySignature(image, firmware_key_file)) {
     debug("Couldn't create key signature.\n");
     KernelImageFree(image);
     return NULL;
@@ skipping 58 matching lines @@
  if (!image)
    return NULL;
  if (is_corrupt) {
    /* Invalidate image. */
    Memset(image->kernel_data, 'X', image->kernel_len);
  }
  kernel_blob = GetKernelBlob(image, &len);
  KernelImageFree(image);
  return kernel_blob;
 }