Major refactoring of structures, with unit tests.

host/include/host_signature.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.
+ *
+ * Host-side functions for verified boot.
+ */
+
+#ifndef VBOOT_REFERENCE_HOST_SIGNATURE_H_
+#define VBOOT_REFERENCE_HOST_SIGNATURE_H_
+
+#include <stdint.h>
+
+#include "cryptolib.h"
+#include "host_key.h"
+#include "utility.h"
+#include "vboot_struct.h"
+
+
+/* Initialize a signature struct. */
+void SignatureInit(VbSignature* sig, uint8_t* sig_data,
+                   uint64_t sig_size, uint64_t data_size);
+
+
+/* Allocate a new signature with space for a [sig_size] byte signature. */
+VbSignature* SignatureAlloc(uint64_t sig_size, uint64_t data_size);
+
+
+/* Copy a signature key from [src] to [dest].
+ *
+ * Returns 0 if success, non-zero if error. */
+int SignatureCopy(VbSignature* dest, const VbSignature* src);
+
+
+/* Calculates a SHA-512 checksum.
+ * Caller owns the returned pointer, and must free it with Free().
+ *
+ * Returns NULL if error. */
+VbSignature* CalculateChecksum(const uint8_t* data, uint64_t size);
+
+
+/* Calculates a signature for the data using the specified key.
+ * Caller owns the returned pointer, and must free it with Free().
+ *
+ * Returns NULL if error. */
+VbSignature* CalculateSignature(const uint8_t* data, uint64_t size,
+                                const VbPrivateKey* key);
+
+#endif  /* VBOOT_REFERENCE_HOST_SIGNATURE_H_ */