VBoot Reference: Add kernel rollback prevention and choosing logic.

src/platform/vboot_reference/tests/kernel_image_tests.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.
  *
  * Tests for kernel image library.
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "file_keys.h"
 #include "kernel_image.h"
 #include "rsa_utility.h"
 #include "test_common.h"
 #include "utility.h"
 
-#define DEV_MODE_ENABLED 1
-#define DEV_MODE_DISABLED 0
-
 /* Normal Kernel Blob Verification Tests. */
 void VerifyKernelTest(uint8_t* kernel_blob, uint8_t* firmware_key_blob) {
   TEST_EQ(VerifyKernel(firmware_key_blob, kernel_blob, DEV_MODE_ENABLED),
           VERIFY_KERNEL_SUCCESS,
           "Normal Kernel Blob Verification (Dev Mode)");
 
   TEST_EQ(VerifyKernel(firmware_key_blob, kernel_blob, DEV_MODE_DISABLED),
           VERIFY_KERNEL_SUCCESS,
           "Normal Kernel Blob Verification (Trusted)");
 }
@@ skipping 103 matching lines @@
 
 failure:
   Free(kernel_blob);
   KernelImageFree(image);
   Free(kernel_sign_key_buf);
   Free(firmware_key_blob);
   RSAPublicKeyFree(firmware_key);
 
   return error_code;
 }