Pass VbSharedData between LoadFirmware() and LoadKernel()

firmware/lib/include/vboot_common.h

-/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+/* Copyright (c) 2011 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 between firmware and kernel verified boot.
  */
 
 #ifndef VBOOT_REFERENCE_VBOOT_COMMON_H_
 #define VBOOT_REFERENCE_VBOOT_COMMON_H_
 
 #include "cryptolib.h"
 #include "vboot_struct.h"
 
 /* Error Codes for all common functions. */
 enum {
   VBOOT_SUCCESS = 0,
   VBOOT_KEY_BLOCK_INVALID,    /* Key block internal structure is
                                * invalid, or not a key block */
   VBOOT_KEY_BLOCK_SIGNATURE,  /* Key block signature check failed */
   VBOOT_KEY_BLOCK_HASH,      /* Key block hash check failed */
   VBOOT_PUBLIC_KEY_INVALID,  /* Invalid public key passed to a
                               * signature verficiation function. */
   VBOOT_PREAMBLE_INVALID,    /* Preamble internal structure is
                               * invalid */
   VBOOT_PREAMBLE_SIGNATURE,  /* Preamble signature check failed */
+  VBOOT_SHARED_DATA_INVALID, /* Shared data is invalid. */
   VBOOT_ERROR_MAX,
 };
 extern char* kVbootErrors[VBOOT_ERROR_MAX];
 
 
 /* Return offset of ptr from base. */
 uint64_t OffsetOf(const void* base, const void* ptr);
 
 
 /* Helper functions to get data pointed to by a public key or signature. */
@@ skipping 64 matching lines @@
 
 
 /* Checks the sanity of a kernel preamble of size [size] bytes,
  * using public key [key].
  *
  * Returns VBOOT_SUCCESS if successful. */
 int VerifyKernelPreamble(const VbKernelPreambleHeader* preamble,
                          uint64_t size, const RSAPublicKey* key);
 
 
+/* Initialize a verified boot shared data structure.
+ *
+ * Returns 0 if success, non-zero if error. */
+int VbSharedDataInit(VbSharedDataHeader* header, uint64_t size);
+
+/* Reserve [size] bytes of the shared data area.  Returns the offset of the
+ * reserved data from the start of the shared data buffer, or 0 if error. */
+uint64_t VbSharedDataReserve(VbSharedDataHeader* header, uint64_t size);
+
+/* Copy the kernel subkey into the shared data.
+ *
+ * Returns 0 if success, non-zero if error. */
+int VbSharedDataSetKernelKey(VbSharedDataHeader* header,
+                             const VbPublicKey* src);
 
 
 #endif  /* VBOOT_REFERENCE_VBOOT_COMMON_H_ */