1 files changed, 78 insertions, 0 deletions
diff --git a/modules/libmar/src/mar_private.h b/modules/libmar/src/mar_private.h
new file mode 100644
index 0000000000..bd9d4386fe
--- /dev/null
+++ b/modules/libmar/src/mar_private.h
@@ -0,0 +1,78 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MAR_PRIVATE_H__
+#define MAR_PRIVATE_H__
+
+#include <assert.h>  // for C11 static_assert
+#include "limits.h"
+#include <stdint.h>
+
+#define BLOCKSIZE 4096
+#define ROUND_UP(n, incr) (((n) / (incr) + 1) * (incr))
+
+#define MAR_ID "MAR1"
+#define MAR_ID_SIZE 4
+
+/* The signature block comes directly after the header block
+   which is 16 bytes */
+#define SIGNATURE_BLOCK_OFFSET 16
+
+/* Make sure the file is less than 500MB.  We do this to protect against
+   invalid MAR files. */
+#define MAX_SIZE_OF_MAR_FILE ((int64_t)524288000)
+
+/* Existing code makes assumptions that the file size is
+   smaller than LONG_MAX. */
+static_assert(MAX_SIZE_OF_MAR_FILE < ((int64_t)LONG_MAX),
+              "max mar file size is too big");
+
+/* We store at most the size up to the signature block + 4
+   bytes per BLOCKSIZE bytes */
+static_assert(sizeof(BLOCKSIZE) < (SIGNATURE_BLOCK_OFFSET + sizeof(uint32_t)),
+              "BLOCKSIZE is too big");
+
+/* The maximum size of any signature supported by current and future
+   implementations of the signmar program. */
+#define MAX_SIGNATURE_LENGTH 2048
+
+/* Each additional block has a unique ID.
+   The product information block has an ID of 1. */
+#define PRODUCT_INFO_BLOCK_ID 1
+
+#define MAR_ITEM_SIZE(namelen) (3 * sizeof(uint32_t) + (namelen) + 1)
+
+/* Product Information Block (PIB) constants */
+#define PIB_MAX_MAR_CHANNEL_ID_SIZE 63
+#define PIB_MAX_PRODUCT_VERSION_SIZE 31
+
+/* The mar program is compiled as a host bin so we don't have access to NSPR at
+   runtime.  For that reason we use ntohl, htonl, and define HOST_TO_NETWORK64
+   instead of the NSPR equivalents. */
+#ifdef XP_WIN
+#  include <winsock2.h>
+/* Include stdio.h before redefining ftello and fseeko to avoid clobbering
+ * the ftello() and fseeko() function declarations in MinGW's stdio.h. */
+#  include <stdio.h>
+#  define ftello _ftelli64
+#  define fseeko _fseeki64
+#else
+#  define _FILE_OFFSET_BITS 64
+#  include <netinet/in.h>
+#  include <unistd.h>
+#  include <stdio.h>
+#endif
+
+#define HOST_TO_NETWORK64(x)                                               \
+  (((((uint64_t)x) & 0xFF) << 56) | ((((uint64_t)x) >> 8) & 0xFF) << 48) | \
+      (((((uint64_t)x) >> 16) & 0xFF) << 40) |                             \
+      (((((uint64_t)x) >> 24) & 0xFF) << 32) |                             \
+      (((((uint64_t)x) >> 32) & 0xFF) << 24) |                             \
+      (((((uint64_t)x) >> 40) & 0xFF) << 16) |                             \
+      (((((uint64_t)x) >> 48) & 0xFF) << 8) | (((uint64_t)x) >> 56)
+#define NETWORK_TO_HOST64 HOST_TO_NETWORK64
+
+#endif /* MAR_PRIVATE_H__ */