Add fuzz testing driver programs for kernel and firmware verification.

src/platform/vboot_reference/utils/kernel_image.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.
  *
  * Functions for generating and manipulating a verified boot kernel image.
  */
 
 #include "kernel_image.h"
 
 #include <fcntl.h>
@@ skipping 386 matching lines @@
 
   /* Verify if the hash of the header is correct. */
   header_checksum = DigestBuf(header_blob,
                               header_len - FIELD_LEN(header_checksum),
                               SHA512_DIGEST_ALGORITHM);
   if (SafeMemcmp(header_checksum,
                  header_blob + (base_header_checksum_offset +
                                 kernel_sign_key_len),
                  FIELD_LEN(header_checksum))) {
     Free(header_checksum);
+    fprintf(stderr, "VerifyKernelHeader: Invalid header hash\n");
     return VERIFY_KERNEL_INVALID_IMAGE;
   }
   Free(header_checksum);
 
   /* Verify kernel key signature unless we are in dev mode. */
   if (!dev_mode) {
     if (!RSAVerifyBinary_f(firmware_key_blob, NULL,  /* Key to use */
                            header_blob,  /* Data to verify */
                            header_len, /* Length of data */
                            header_blob + header_len,  /* Expected Signature */
@@ skipping 259 matching lines @@
                                         kernel_signing_key_file,
                                         image->kernel_sign_algorithm))) {
     fprintf(stderr, "Could not compute signature on the kernel.\n");
     return 0;
   }
   image->kernel_signature = (uint8_t*) Malloc(signature_len);
   Memcpy(image->kernel_signature, kernel_signature, signature_len);
   Free(kernel_signature);
   return 1;
 }