src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_msbyte_uint32.h

   1 /******************************************************************************
   2  * NTRU Cryptography Reference Source Code
   3  * Copyright (c) 2009-2013, by Security Innovation, Inc. All rights reserved.
   4  *
   5  * ntru_crypto_msbyte_uint32.h is a component of ntru-crypto.
   6  *
   7  * Copyright (C) 2009-2013  Security Innovation
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  22  *
  23  *****************************************************************************/
  24
  25 /******************************************************************************
  26  *
  27  * File: ntru_crypto_msbyte_uint32.h
  28  *
  29  * Contents: Definitions and declarations for converting between a most-
  30  *           significant-first byte stream and a uint32_t array.
  31  *
  32  *****************************************************************************/
  33
  34 #ifndef NTRU_CRYPTO_MSBYTE_UINT32_H
  35 #define NTRU_CRYPTO_MSBYTE_UINT32_H
  36
  37
  38 #include "ntru_crypto_platform.h"
  39
  40
  41 /* ntru_crypto_msbyte_2_uint32()
  42  *
  43  * This routine converts an array of bytes in network byte order to an array
  44  * of uint32_t, placing the first byte in the most significant byte of the
  45  * first uint32_t word.
  46  *
  47  * The number of bytes in the input stream MUST be at least 4 times the
  48  * number of words expected in the output array.
  49  */
  50
  51 extern void
  52 ntru_crypto_msbyte_2_uint32(
  53     uint32_t       *words,      // out - pointer to the output uint32_t array
  54     uint8_t const  *bytes,      //  in - pointer to the input byte array
  55     uint32_t        n);         //  in - number of words in the output array
  56
  57
  58 /* ntru_crypto_uint32_2_msbyte()
  59  *
  60  * This routine converts an array of uint32_t to an array of bytes in
  61  * network byte order, placing the most significant byte of the first uint32_t
  62  * word as the first byte of the output array.
  63  *
  64  * The number of bytes in the output stream will be 4 times the number of words
  65  * specified in the input array.
  66  */
  67
  68 extern void
  69 ntru_crypto_uint32_2_msbyte(
  70     uint8_t        *bytes,      // out - pointer to the output byte array
  71     uint32_t const *words,      //  in - pointer to the input uint32_t array
  72     uint32_t        n);         //  in - number of words in the input array
  73
  74
  75 #endif /* NTRU_CRYPTO_MSBYTE_UINT32_H */