Make kernel signature a part of the kernel preamble.

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 15 matching lines @@
     fprintf(stderr, "%s Test " COL_GREEN "PASSED\n" COL_STOP, testname);
     return 1;
   }
   else {
     fprintf(stderr, "%s Test " COL_RED "FAILED\n" COL_STOP, testname);
     gTestSuccess = 0;
     return 0;
   }
 }
 
+int TEST_NEQ(int result, int not_expected_result, char* testname) {
+  if (result != not_expected_result) {
+    fprintf(stderr, "%s Test " COL_GREEN "PASSED\n" COL_STOP, testname);
+    return 1;
+  }
+  else {
+    fprintf(stderr, "%s Test " COL_RED "FAILED\n" COL_STOP, testname);
+    gTestSuccess = 0;
+    return 0;
+  }
+}
+
 FirmwareImage* GenerateTestFirmwareImage(int algorithm,
                                          const uint8_t* firmware_sign_key,
                                          int firmware_key_version,
                                          int firmware_version,
                                          uint64_t firmware_len,
                                          const char* root_key_file,
                                          const char* firmware_key_file,
                                          uint8_t firmware_data_fill_char) {
   FirmwareImage* image = FirmwareImageNew();
 
@@ skipping 188 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;
 }