Vboot Reference: Kernel Boot signing utility.

src/platform/vboot_reference/utils/firmware_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 firmware image.
  */
 
 #include "firmware_image.h"
 
 #include <fcntl.h>
@@ skipping 117 matching lines @@
   if(st.remaining_len != 0) {  /* Overrun or underrun. */
     Free(firmware_buf);
     return NULL;
   }
 
   Free(firmware_buf);
   return image;
 }
 
 int GetFirmwareHeaderLen(const FirmwareImage* image) {
-  return (FIELD_LEN(header_len) + FIELD_LEN(header_len) +
+  return (FIELD_LEN(header_len) + FIELD_LEN(firmware_sign_algorithm) +
           RSAProcessedKeySize(image->firmware_sign_algorithm) +
           FIELD_LEN(firmware_key_version) + FIELD_LEN(header_checksum));
 }
 
 uint8_t* GetFirmwareHeaderBlob(const FirmwareImage* image) {
   uint8_t* header_blob = NULL;
   MemcpyState st;
 
   header_blob = (uint8_t*) Malloc(GetFirmwareHeaderLen(image));
   st.remaining_len = GetFirmwareHeaderLen(image);
@@ skipping 430 matching lines @@
   if (!(firmware_signature = SignatureBuf(image->firmware_data,
                                           image->firmware_len,
                                           signing_key_file,
                                           image->firmware_sign_algorithm)))
     return 0;
   image->firmware_signature = (uint8_t*) Malloc(signature_len);
   Memcpy(image->firmware_signature, firmware_signature, signature_len);
   Free(firmware_signature);
   return 1;
 }