Vboot Reference: Make length types explicitly sized.

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>
 
@@ skipping 152 matching lines @@
     success = 0;
   if (!TEST_EQ(VerifyKernelImage(firmware_key, image, DEV_MODE_DISABLED),
                VERIFY_KERNEL_KEY_SIGNATURE_FAILED,
                "KernelImage Key Signature Tamper Verification (Trusted)"))
     success = 0;
 
   return success;
 }
 
 int main(int argc, char* argv[]) {
-  uint32_t len;
+  uint64_t len;
   uint8_t* kernel_sign_key_buf = NULL;
   uint8_t* firmware_key_blob = NULL;
   uint8_t* kernel_blob = NULL;
   int kernel_blob_len = 0;
   KernelImage* image = NULL;
   RSAPublicKey* firmware_key = NULL;
   int error_code = 1;
 
   if(argc != 7) {
     fprintf(stderr, "Usage: %s <firmware signing algorithm> "  /* argv[1] */
@@ skipping 53 matching lines @@
 
 failure:
   Free(kernel_blob);
   KernelImageFree(image);
   Free(kernel_sign_key_buf);
   Free(firmware_key_blob);
   Free(firmware_key);
 
   return error_code;
 }