include/onlineupdate/mar_private.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MAR_PRIVATE_H__
   8 #define MAR_PRIVATE_H__
   9
  10 #include "limits.h"
  11 #include "mozilla/Assertions.h"
  12 #include <stdint.h>
  13
  14 #define BLOCKSIZE 4096
  15 #define ROUND_UP(n, incr) (((n) / (incr) + 1) * (incr))
  16
  17 #define MAR_ID "MAR1"
  18 #define MAR_ID_SIZE 4
  19
  20 /* The signature block comes directly after the header block
  21    which is 16 bytes */
  22 #define SIGNATURE_BLOCK_OFFSET 16
  23
  24 /* Make sure the file is less than 500MB.  We do this to protect against
  25    invalid MAR files. */
  26 #define MAX_SIZE_OF_MAR_FILE ((int64_t)524288000)
  27
  28 /* Existing code makes assumptions that the file size is
  29    smaller than LONG_MAX. */
  30 MOZ_STATIC_ASSERT(MAX_SIZE_OF_MAR_FILE < ((int64_t)LONG_MAX),
  31                   "max mar file size is too big");
  32
  33 /* We store at most the size up to the signature block + 4
  34    bytes per BLOCKSIZE bytes */
  35 MOZ_STATIC_ASSERT(sizeof(BLOCKSIZE) < \
  36                   (SIGNATURE_BLOCK_OFFSET + sizeof(uint32_t)),
  37                   "BLOCKSIZE is too big");
  38
  39 /* The maximum size of any signature supported by current and future
  40    implementations of the signmar program. */
  41 #define MAX_SIGNATURE_LENGTH 2048
  42
  43 /* Each additional block has a unique ID.
  44    The product information block has an ID of 1. */
  45 #define PRODUCT_INFO_BLOCK_ID 1
  46
  47 #define MAR_ITEM_SIZE(namelen) (3*sizeof(uint32_t) + (namelen) + 1)
  48
  49 /* Product Information Block (PIB) constants */
  50 #define PIB_MAX_MAR_CHANNEL_ID_SIZE 63
  51 #define PIB_MAX_PRODUCT_VERSION_SIZE 31
  52
  53 /* The mar program is compiled as a host bin so we don't have access to NSPR at
  54    runtime.  For that reason we use ntohl, htonl, and define HOST_TO_NETWORK64
  55    instead of the NSPR equivalents. */
  56 #ifdef _WIN32
  57 #include <winsock2.h>
  58 #define ftello _ftelli64
  59 #define fseeko _fseeki64
  60 #else
  61 #define _FILE_OFFSET_BITS 64
  62 #include <netinet/in.h>
  63 #include <unistd.h>
  64 #endif
  65
  66 #include <stdio.h>
  67
  68 #define HOST_TO_NETWORK64(x) ( \
  69   ((((uint64_t) x) & 0xFF) << 56) | \
  70   ((((uint64_t) x) >> 8) & 0xFF) << 48) | \
  71   (((((uint64_t) x) >> 16) & 0xFF) << 40) | \
  72   (((((uint64_t) x) >> 24) & 0xFF) << 32) | \
  73   (((((uint64_t) x) >> 32) & 0xFF) << 24) | \
  74   (((((uint64_t) x) >> 40) & 0xFF) << 16) | \
  75   (((((uint64_t) x) >> 48) & 0xFF) << 8) | \
  76   (((uint64_t) x) >> 56)
  77 #define NETWORK_TO_HOST64 HOST_TO_NETWORK64
  78
  79 #endif  /* MAR_PRIVATE_H__ */