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   1 /* des.h */
   2 /*
   3     This file is part of the ARM-Crypto-Lib.
   4     Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
   5
   6     This program is free software: you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation, either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19 /**
  20  * \file        des.h
  21  * \author      Daniel Otte
  22  * \date        2007-06-16
  23  * \brief       des and tdes declarations
  24  * \license     GPLv3 or later
  25  *
  26  */
  27 #ifndef DES_H_
  28 #define DES_H_
  29
  30 /* the FIPS 46-3 (1999-10-25) name for triple DES is triple data encryption algorithm so TDEA.
  31  * Also we only implement the three key mode  */
  32
  33 /** \def tdea_enc
  34  * \brief defining an alias for void tdes_enc(void* out, const void* in, const void* key)
  35  */
  36
  37 /** \def tdea_dec
  38  * \brief defining an alias for void tdes_dec(void* out, const void* in, const void* key)
  39  */
  40
  41 #define tdea_enc tdes_enc
  42 #define tdea_dec tdes_dec
  43
  44 /** \fn void des_enc(void* out, const void* in, const void* key)
  45  * \brief encrypt a block with DES
  46  *
  47  * This function encrypts a block of 64 bits (8 bytes) with the DES algorithm.
  48  * Key expansion is done automatically. The key is 64 bits long, but note that
  49  * only 56 bits are used (the LSB of each byte is dropped). The input and output
  50  * blocks may overlap.
  51  *
  52  * \param out pointer to the block (64 bit = 8 byte) where the ciphertext is written to
  53  * \param in  pointer to the block (64 bit = 8 byte) where the plaintext is read from
  54  * \param key pointer to the key (64 bit = 8 byte)
  55  */
  56 void des_enc(void* out, const void* in, const void* key);
  57
  58 /** \fn void des_dec(void* out, const void* in, const void* key)
  59  * \brief decrypt a block with DES
  60  *
  61  * This function decrypts a block of 64 bits (8 bytes) with the DES algorithm.
  62  * Key expansion is done automatically. The key is 64 bits long, but note that
  63  * only 56 bits are used (the LSB of each byte is dropped). The input and output
  64  * blocks may overlap.
  65  *
  66  * \param out pointer to the block (64 bit = 8 byte) where the plaintext is written to
  67  * \param in  pointer to the block (64 bit = 8 byte) where the ciphertext is read from
  68  * \param key pointer to the key (64 bit = 8 byte)
  69  */
  70 void des_dec(void* out, const void* in, const void* key);
  71
  72 /** \fn void tdes_enc(void* out, const void* in, const void* key)
  73  * \brief encrypt a block with Tripple-DES
  74  *
  75  * This function encrypts a block of 64 bits (8 bytes) with the Tripple-DES (EDE)
  76  * algorithm. Key expansion is done automatically. The key is 192 bits long, but
  77  * note that only 178 bits are used (the LSB of each byte is dropped). The input
  78  * and output blocks may overlap.
  79  *
  80  * \param out pointer to the block (64 bit = 8 byte) where the ciphertext is written to
  81  * \param in  pointer to the block (64 bit = 8 byte) where the plaintext is read from
  82  * \param key pointer to the key (192 bit = 24 byte)
  83  */
  84 void tdes_enc(void* out, const void* in, const void* key);
  85
  86 /** \fn void tdes_dec(void* out, const void* in, const void* key)
  87  * \brief decrypt a block with Tripple-DES
  88  *
  89  * This function decrypts a block of 64 bits (8 bytes) with the Tripple-DES (EDE)
  90  * algorithm. Key expansion is done automatically. The key is 192 bits long, but
  91  * note that only 178 bits are used (the LSB of each byte is dropped). The input
  92  * and output blocks may overlap.
  93  *
  94  * \param out pointer to the block (64 bit = 8 byte) where the plaintext is written to
  95  * \param in  pointer to the block (64 bit = 8 byte) where the ciphertext is read from
  96  * \param key pointer to the key (192 bit = 24 byte)
  97  */
  98  void tdes_dec(void* out, const void* in, const void* key);
  99
 100 #endif /*DES_H_*/
 101
 102 // Copied from des.h in desfire imp.
 103 typedef unsigned long DES_KS[16][2];   /* Single-key DES key schedule */
 104 typedef unsigned long DES3_KS[48][2];  /* Triple-DES key schedule */
 105
 106
 107 extern int Asmversion; /* 1 if we're linked with an asm version, 0 if C */