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cyclone_crypto/keccak.h@0:8918a71cdbe9, 2017-02-04 (annotated)

Committer:
Sergunb
Date:
Sat Feb 04 18:15:49 2017 +0000
Revision:
0:8918a71cdbe9
nothing else

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Sergunb 0:8918a71cdbe9 1 /**
Sergunb 0:8918a71cdbe9 2 * @file keccak.h
Sergunb 0:8918a71cdbe9 3 * @brief Keccak sponge function
Sergunb 0:8918a71cdbe9 4 *
Sergunb 0:8918a71cdbe9 5 * @section License
Sergunb 0:8918a71cdbe9 6 *
Sergunb 0:8918a71cdbe9 7 * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
Sergunb 0:8918a71cdbe9 8 *
Sergunb 0:8918a71cdbe9 9 * This file is part of CycloneCrypto Open.
Sergunb 0:8918a71cdbe9 10 *
Sergunb 0:8918a71cdbe9 11 * This program is free software; you can redistribute it and/or
Sergunb 0:8918a71cdbe9 12 * modify it under the terms of the GNU General Public License
Sergunb 0:8918a71cdbe9 13 * as published by the Free Software Foundation; either version 2
Sergunb 0:8918a71cdbe9 14 * of the License, or (at your option) any later version.
Sergunb 0:8918a71cdbe9 15 *
Sergunb 0:8918a71cdbe9 16 * This program is distributed in the hope that it will be useful,
Sergunb 0:8918a71cdbe9 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Sergunb 0:8918a71cdbe9 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Sergunb 0:8918a71cdbe9 19 * GNU General Public License for more details.
Sergunb 0:8918a71cdbe9 20 *
Sergunb 0:8918a71cdbe9 21 * You should have received a copy of the GNU General Public License
Sergunb 0:8918a71cdbe9 22 * along with this program; if not, write to the Free Software Foundation,
Sergunb 0:8918a71cdbe9 23 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Sergunb 0:8918a71cdbe9 24 *
Sergunb 0:8918a71cdbe9 25 * @author Oryx Embedded SARL (www.oryx-embedded.com)
Sergunb 0:8918a71cdbe9 26 * @version 1.7.6
Sergunb 0:8918a71cdbe9 27 **/
Sergunb 0:8918a71cdbe9 28
Sergunb 0:8918a71cdbe9 29 #ifndef _KECCAK_H
Sergunb 0:8918a71cdbe9 30 #define _KECCAK_H
Sergunb 0:8918a71cdbe9 31
Sergunb 0:8918a71cdbe9 32 //Dependencies
Sergunb 0:8918a71cdbe9 33 #include "crypto.h"
Sergunb 0:8918a71cdbe9 34
Sergunb 0:8918a71cdbe9 35 //The binary logarithm of the lane size
Sergunb 0:8918a71cdbe9 36 #ifndef KECCAK_L
Sergunb 0:8918a71cdbe9 37 #define KECCAK_L 6
Sergunb 0:8918a71cdbe9 38 #endif
Sergunb 0:8918a71cdbe9 39
Sergunb 0:8918a71cdbe9 40 //Check lane size
Sergunb 0:8918a71cdbe9 41 #if (KECCAK_L == 3)
Sergunb 0:8918a71cdbe9 42 //Base type that represents a lane
Sergunb 0:8918a71cdbe9 43 typedef uint8_t keccak_lane_t;
Sergunb 0:8918a71cdbe9 44 //Rotate left operation
Sergunb 0:8918a71cdbe9 45 #define KECCAK_ROL(a, n) ROL8(a, n)
Sergunb 0:8918a71cdbe9 46 //Host byte order to little-endian byte order
Sergunb 0:8918a71cdbe9 47 #define KECCAK_HTOLE(a) (a)
Sergunb 0:8918a71cdbe9 48 //Little-endian byte order to host byte order
Sergunb 0:8918a71cdbe9 49 #define KECCAK_LETOH(a) (a)
Sergunb 0:8918a71cdbe9 50 #elif (KECCAK_L == 4)
Sergunb 0:8918a71cdbe9 51 //Base type that represents a lane
Sergunb 0:8918a71cdbe9 52 #define keccak_lane_t uint16_t
Sergunb 0:8918a71cdbe9 53 //Rotate left operation
Sergunb 0:8918a71cdbe9 54 #define KECCAK_ROL(a, n) ROL16(a, n)
Sergunb 0:8918a71cdbe9 55 //Host byte order to little-endian byte order
Sergunb 0:8918a71cdbe9 56 #define KECCAK_HTOLE(a) htole16(a)
Sergunb 0:8918a71cdbe9 57 //Little-endian byte order to host byte order
Sergunb 0:8918a71cdbe9 58 #define KECCAK_LETOH(a) letoh16(a)
Sergunb 0:8918a71cdbe9 59 #elif (KECCAK_L == 5)
Sergunb 0:8918a71cdbe9 60 //Base type that represents a lane
Sergunb 0:8918a71cdbe9 61 #define keccak_lane_t uint32_t
Sergunb 0:8918a71cdbe9 62 //Rotate left operation
Sergunb 0:8918a71cdbe9 63 #define KECCAK_ROL(a, n) ROL32(a, n)
Sergunb 0:8918a71cdbe9 64 //Host byte order to little-endian byte order
Sergunb 0:8918a71cdbe9 65 #define KECCAK_HTOLE(a) htole32(a)
Sergunb 0:8918a71cdbe9 66 //Little-endian byte order to host byte order
Sergunb 0:8918a71cdbe9 67 #define KECCAK_LETOH(a) letoh32(a)
Sergunb 0:8918a71cdbe9 68 #elif (KECCAK_L == 6)
Sergunb 0:8918a71cdbe9 69 //Base type that represents a lane
Sergunb 0:8918a71cdbe9 70 #define keccak_lane_t uint64_t
Sergunb 0:8918a71cdbe9 71 //Rotate left operation
Sergunb 0:8918a71cdbe9 72 #define KECCAK_ROL(a, n) ROL64(a, n)
Sergunb 0:8918a71cdbe9 73 //Host byte order to little-endian byte order conversion
Sergunb 0:8918a71cdbe9 74 #define KECCAK_HTOLE(a) htole64(a)
Sergunb 0:8918a71cdbe9 75 //Little-endian byte order to host byte order conversion
Sergunb 0:8918a71cdbe9 76 #define KECCAK_LETOH(a) letoh64(a)
Sergunb 0:8918a71cdbe9 77 #else
Sergunb 0:8918a71cdbe9 78 #error KECCAK_L parameter is not valid
Sergunb 0:8918a71cdbe9 79 #endif
Sergunb 0:8918a71cdbe9 80
Sergunb 0:8918a71cdbe9 81 //The lane size of a Keccak-p permutation in bits
Sergunb 0:8918a71cdbe9 82 #define KECCAK_W (1 << KECCAK_L)
Sergunb 0:8918a71cdbe9 83 //The width of a Keccak-p permutation
Sergunb 0:8918a71cdbe9 84 #define KECCAK_B (KECCAK_W * 25)
Sergunb 0:8918a71cdbe9 85 //The number of rounds for a Keccak-p permutation
Sergunb 0:8918a71cdbe9 86 #define KECCAK_NR (12 + 2 * KECCAK_L)
Sergunb 0:8918a71cdbe9 87
Sergunb 0:8918a71cdbe9 88
Sergunb 0:8918a71cdbe9 89 /**
Sergunb 0:8918a71cdbe9 90 * @brief Keccak context
Sergunb 0:8918a71cdbe9 91 **/
Sergunb 0:8918a71cdbe9 92
Sergunb 0:8918a71cdbe9 93 typedef struct
Sergunb 0:8918a71cdbe9 94 {
Sergunb 0:8918a71cdbe9 95 union
Sergunb 0:8918a71cdbe9 96 {
Sergunb 0:8918a71cdbe9 97 keccak_lane_t a[5][5];
Sergunb 0:8918a71cdbe9 98 uint8_t digest[1];
Sergunb 0:8918a71cdbe9 99 };
Sergunb 0:8918a71cdbe9 100 union
Sergunb 0:8918a71cdbe9 101 {
Sergunb 0:8918a71cdbe9 102 keccak_lane_t block[24];
Sergunb 0:8918a71cdbe9 103 uint8_t buffer[1];
Sergunb 0:8918a71cdbe9 104 };
Sergunb 0:8918a71cdbe9 105 uint_t blockSize;
Sergunb 0:8918a71cdbe9 106 size_t length;
Sergunb 0:8918a71cdbe9 107 } KeccakContext;
Sergunb 0:8918a71cdbe9 108
Sergunb 0:8918a71cdbe9 109
Sergunb 0:8918a71cdbe9 110 //Keccak related functions
Sergunb 0:8918a71cdbe9 111 error_t keccakInit(KeccakContext *context, uint_t capacity);
Sergunb 0:8918a71cdbe9 112 void keccakAbsorb(KeccakContext *context, const void *input, size_t length);
Sergunb 0:8918a71cdbe9 113 void keccakFinal(KeccakContext *context, uint8_t pad);
Sergunb 0:8918a71cdbe9 114 void keccakSqueeze(KeccakContext *context, uint8_t *output, size_t length);
Sergunb 0:8918a71cdbe9 115 void keccakPermutBlock(KeccakContext *context);
Sergunb 0:8918a71cdbe9 116
Sergunb 0:8918a71cdbe9 117 #endif
Sergunb 0:8918a71cdbe9 118