package/inc/EncryptedDataHeader.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #ifndef INCLUDED_PACKAGE_INC_ENCRYPTEDDATAHEADER_HXX
  20 #define INCLUDED_PACKAGE_INC_ENCRYPTEDDATAHEADER_HXX
  21
  22 #include <sal/types.h>
  23
  24 /* The structure of this header is as follows:
  25
  26    Header signature  4 bytes
  27    Version number    2 bytes
  28    PBKDF2 Iteration count   4 bytes
  29    Argon2 t_cost     4 bytes
  30    Argon2 m_cost     4 bytes
  31    Argon2 lanes      4 bytes
  32    Size              4 bytes
  33    EncAlgorithm      4 bytes
  34    DigestAlgorithm   4 bytes
  35    DerivedKeySize    4 bytes
  36    StartKeyAlgorithm 4 bytes
  37    Salt length       2 bytes
  38    IV length         2 bytes
  39    Digest length     2 bytes
  40    MediaType length  2 bytes
  41    Salt content      X bytes
  42    IV content        X bytes
  43    digest content    X bytes
  44    MediaType         X bytes
  45
  46 */
  47 const sal_uInt32 n_ConstHeader = 0x05024d4dL; // "MM\002\005"
  48 const sal_Int32 n_ConstHeaderSize
  49     = 50; // + salt length + iv length + digest length + mediatype length
  50 const sal_Int16 n_ConstCurrentVersion = 2;
  51 #endif
  52
  53 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */