Refactor LoadFrmware() to avoid global variables, which don't work when running out of ROM

vboot_firmware/lib/include/vboot_common.h

 /* 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.
  *
  * Common functions between firmware and kernel verified boot.
  */
 
 #ifndef VBOOT_REFERENCE_VBOOT_COMMON_H_
 #define VBOOT_REFERENCE_VBOOT_COMMON_H_
 
@@ skipping 37 matching lines @@
                        uint64_t member_data_offset,
                        uint64_t member_data_size);
 
 int VerifyPublicKeyInside(const void* parent, uint64_t parent_size,
                           const VbPublicKey* key);
 
 int VerifySignatureInside(const void* parent, uint64_t parent_size,
                           const VbSignature* sig);
 
 
+/* Initialize a public key to refer to [key_data]. */
+void PublicKeyInit(VbPublicKey* key, uint8_t* key_data, uint64_t key_size);
+
+
+/* Copy a public key from [src] to [dest].
+ *
+ * Returns 0 if success, non-zero if error. */
+int PublicKeyCopy(VbPublicKey* dest, const VbPublicKey* src);
+
+
 /* Converts a public key to RsaPublicKey format.  The returned key must
  * be freed using RSAPublicKeyFree().
  *
  * Returns NULL if error. */
 RSAPublicKey* PublicKeyToRSA(const VbPublicKey* key);
 
 
 /* Verifies [data] matches signature [sig] using [key]. */
 int VerifyData(const uint8_t* data, const VbSignature* sig,
                const RSAPublicKey* key);
@@ skipping 25 matching lines @@
  * using public key [key].
  *
  * Returns VBOOT_SUCCESS if successful. */
 int VerifyKernelPreamble2(const VbKernelPreambleHeader* preamble,
                          uint64_t size, const RSAPublicKey* key);
 
 
 
 
 #endif  /* VBOOT_REFERENCE_VBOOT_COMMON_H_ */