Mercurial > dropbear

annotate libtomcrypt/src/ciphers/twofish/twofish.c @ 1723:5386011b740d

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Disable toom and karatsuba for new libtommath
author Matt Johnston <matt@ucc.asn.au>
date Thu, 18 Jun 2020 19:12:07 +0800
parents 1ff2a1034c52
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9
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10 /**
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11 @file twofish.c
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12 Implementation of Twofish by Tom St Denis
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13 */
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14 #include "tomcrypt.h"
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15
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16 #ifdef LTC_TWOFISH
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17
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18 /* first LTC_TWOFISH_ALL_TABLES must ensure LTC_TWOFISH_TABLES is defined */
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19 #ifdef LTC_TWOFISH_ALL_TABLES
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20 #ifndef LTC_TWOFISH_TABLES
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21 #define LTC_TWOFISH_TABLES
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22 #endif
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23 #endif
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25 const struct ltc_cipher_descriptor twofish_desc =
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26 {
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27 "twofish",
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28 7,
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29 16, 32, 16, 16,
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30 &twofish_setup,
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31 &twofish_ecb_encrypt,
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32 &twofish_ecb_decrypt,
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33 &twofish_test,
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34 &twofish_done,
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35 &twofish_keysize,
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36 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
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37 };
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39 /* the two polynomials */
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40 #define MDS_POLY 0x169
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41 #define RS_POLY 0x14D
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43 /* The 4x8 RS Linear Transform */
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44 static const unsigned char RS[4][8] = {
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45 { 0x01, 0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E },
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46 { 0xA4, 0x56, 0x82, 0xF3, 0X1E, 0XC6, 0X68, 0XE5 },
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47 { 0X02, 0XA1, 0XFC, 0XC1, 0X47, 0XAE, 0X3D, 0X19 },
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48 { 0XA4, 0X55, 0X87, 0X5A, 0X58, 0XDB, 0X9E, 0X03 }
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49 };
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50
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51 #ifdef LTC_TWOFISH_SMALL
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52 /* sbox usage orderings */
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53 static const unsigned char qord[4][5] = {
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54 { 1, 1, 0, 0, 1 },
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55 { 0, 1, 1, 0, 0 },
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56 { 0, 0, 0, 1, 1 },
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57 { 1, 0, 1, 1, 0 }
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58 };
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59 #endif /* LTC_TWOFISH_SMALL */
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61 #ifdef LTC_TWOFISH_TABLES
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62
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63 #define __LTC_TWOFISH_TAB_C__
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64 #include "twofish_tab.c"
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65
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66 #define sbox(i, x) ((ulong32)SBOX[i][(x)&255])
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67
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68 #else
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