dropbear: libtomcrypt/src/ciphers/twofish/twofish.c annotate

annotate libtomcrypt/src/ciphers/twofish/twofish.c @ 308:6e5f8ce73bf2 ucc-axis-hack

add break handler

author	matt-ucc@ucc.asn.au
date	Sat, 25 Mar 2006 18:35:35 +0000
parents	1b9e69c058d2
children	0cbe8f6dbf9e

rev	line source
285 1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 *
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 * LibTomCrypt is a library that provides various cryptographic
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * algorithms in a highly modular and flexible manner.
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 *
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 * The library is free for all purposes without any express
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * guarantee it works.
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 *
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * Tom St Denis, [email protected], http://libtomcrypt.org
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 /**
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 @file twofish.c
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 Implementation of Twofish by Tom St Denis
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 #include "tomcrypt.h"
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 #ifdef TWOFISH
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 /* first TWOFISH_ALL_TABLES must ensure TWOFISH_TABLES is defined */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 #ifdef TWOFISH_ALL_TABLES
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 #ifndef TWOFISH_TABLES
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 #define TWOFISH_TABLES
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 const struct ltc_cipher_descriptor twofish_desc =
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 "twofish",
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 7,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 16, 32, 16, 16,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 &twofish_setup,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 &twofish_ecb_encrypt,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 &twofish_ecb_decrypt,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 &twofish_test,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 &twofish_done,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 &twofish_keysize,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38 NULL, NULL, NULL, NULL, NULL, NULL, NULL
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39 };
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	40
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41 /* the two polynomials */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 #define MDS_POLY 0x169
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 #define RS_POLY 0x14D
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 /* The 4x4 MDS Linear Transform */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 #if 0
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 static const unsigned char MDS[4][4] = {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 { 0x01, 0xEF, 0x5B, 0x5B },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 { 0x5B, 0xEF, 0xEF, 0x01 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50 { 0xEF, 0x5B, 0x01, 0xEF },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51 { 0xEF, 0x01, 0xEF, 0x5B }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	52 };
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	53 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	54
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55 /* The 4x8 RS Linear Transform */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56 static const unsigned char RS[4][8] = {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57 { 0x01, 0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	58 { 0xA4, 0x56, 0x82, 0xF3, 0X1E, 0XC6, 0X68, 0XE5 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59 { 0X02, 0XA1, 0XFC, 0XC1, 0X47, 0XAE, 0X3D, 0X19 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60 { 0XA4, 0X55, 0X87, 0X5A, 0X58, 0XDB, 0X9E, 0X03 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61 };
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	63 /* sbox usage orderings */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64 static const unsigned char qord[4][5] = {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65 { 1, 1, 0, 0, 1 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 { 0, 1, 1, 0, 0 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 { 0, 0, 0, 1, 1 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 { 1, 0, 1, 1, 0 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 };
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71 #ifdef TWOFISH_TABLES
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	73 #include "twofish_tab.c"
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75 #define sbox(i, x) ((ulong32)SBOX[i][(x)&255])
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79 /* The Q-box tables */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80 static const unsigned char qbox[2][4][16] = {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82 { 0x8, 0x1, 0x7, 0xD, 0x6, 0xF, 0x3, 0x2, 0x0, 0xB, 0x5, 0x9, 0xE, 0xC, 0xA, 0x4 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83 { 0xE, 0XC, 0XB, 0X8, 0X1, 0X2, 0X3, 0X5, 0XF, 0X4, 0XA, 0X6, 0X7, 0X0, 0X9, 0XD },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 { 0XB, 0XA, 0X5, 0XE, 0X6, 0XD, 0X9, 0X0, 0XC, 0X8, 0XF, 0X3, 0X2, 0X4, 0X7, 0X1 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	85 { 0XD, 0X7, 0XF, 0X4, 0X1, 0X2, 0X6, 0XE, 0X9, 0XB, 0X3, 0X0, 0X8, 0X5, 0XC, 0XA }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88 { 0X2, 0X8, 0XB, 0XD, 0XF, 0X7, 0X6, 0XE, 0X3, 0X1, 0X9, 0X4, 0X0, 0XA, 0XC, 0X5 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	89 { 0X1, 0XE, 0X2, 0XB, 0X4, 0XC, 0X3, 0X7, 0X6, 0XD, 0XA, 0X5, 0XF, 0X9, 0X0, 0X8 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90 { 0X4, 0XC, 0X7, 0X5, 0X1, 0X6, 0X9, 0XA, 0X0, 0XE, 0XD, 0X8, 0X2, 0XB, 0X3, 0XF },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	91 { 0xB, 0X9, 0X5, 0X1, 0XC, 0X3, 0XD, 0XE, 0X6, 0X4, 0X7, 0XF, 0X2, 0X0, 0X8, 0XA }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 };
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 /* computes S_i[x] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 static ulong32 _sbox(int i, ulong32 x)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 static ulong32 sbox(int i, ulong32 x)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 unsigned char a0,b0,a1,b1,a2,b2,a3,b3,a4,b4,y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 /* a0,b0 = [x/16], x mod 16 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 a0 = (unsigned char)((x>>4)&15);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106 b0 = (unsigned char)((x)&15);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 /* a1 = a0 ^ b0 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 a1 = a0 ^ b0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 /* b1 = a0 ^ ROR(b0, 1) ^ 8a0 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 b1 = (a0 ^ ((b0<<3)\|(b0>>1)) ^ (a0<<3)) & 15;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 /* a2,b2 = t0[a1], t1[b1] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115 a2 = qbox[i][0][(int)a1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 b2 = qbox[i][1][(int)b1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 /* a3 = a2 ^ b2 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 a3 = a2 ^ b2;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121 /* b3 = a2 ^ ROR(b2, 1) ^ 8a2 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 b3 = (a2 ^ ((b2<<3)\|(b2>>1)) ^ (a2<<3)) & 15;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 /* a4,b4 = t2[a3], t3[b3] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 a4 = qbox[i][2][(int)a3];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 b4 = qbox[i][3][(int)b3];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 /* y = 16b4 + a4 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 y = (b4 << 4) + a4;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 /* return result */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 return (ulong32)y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 static ulong32 sbox(int i, ulong32 x)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 ulong32 y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139 y = _sbox(i, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 burn_stack(sizeof(unsigned char) * 11);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 return y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 #endif /* LTC_CLEAN_STACK */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 #endif /* TWOFISH_TABLES */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 /* computes ab mod p */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 static ulong32 gf_mult(ulong32 a, ulong32 b, ulong32 p)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 ulong32 result, B[2], P[2];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 P[1] = p;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 B[1] = b;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 result = P[0] = B[0] = 0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 /* unrolled branchless GF multiplier */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 result ^= B[a&1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 return result;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 /* computes [y0 y1 y2 y3] = MDS . [x0] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 #ifndef TWOFISH_TABLES
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 static ulong32 mds_column_mult(unsigned char in, int col)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 ulong32 x01, x5B, xEF;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175 x01 = in;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 x5B = gf_mult(in, 0x5B, MDS_POLY);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 xEF = gf_mult(in, 0xEF, MDS_POLY);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	179 switch (col) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	180 case 0:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	181 return (x01 << 0 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 (x5B << 8 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183 (xEF << 16) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 (xEF << 24);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185 case 1:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 return (xEF << 0 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187 (xEF << 8 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 (x5B << 16) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 (x01 << 24);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 case 2:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 return (x5B << 0 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 (xEF << 8 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 (x01 << 16) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 (xEF << 24);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 case 3:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 return (x5B << 0 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 (x01 << 8 ) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 (xEF << 16) \|
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 (x5B << 24);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 /* avoid warnings, we'd never get here normally but just to calm compiler warnings... */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 return 0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 #else /* !TWOFISH_TABLES */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 #define mds_column_mult(x, i) mds_tab[i][x]
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 #endif /* TWOFISH_TABLES */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 /* Computes [y0 y1 y2 y3] = MDS . [x0 x1 x2 x3] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 static void mds_mult(const unsigned char in, unsigned char out)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 int x;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 ulong32 tmp;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 for (tmp = x = 0; x < 4; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 tmp ^= mds_column_mult(in[x], x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 STORE32L(tmp, out);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 #ifdef TWOFISH_ALL_TABLES
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 /* computes [y0 y1 y2 y3] = RS . [x0 x1 x2 x3 x4 x5 x6 x7] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224 static void rs_mult(const unsigned char in, unsigned char out)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 ulong32 tmp;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227 tmp = rs_tab0[in[0]] ^ rs_tab1[in[1]] ^ rs_tab2[in[2]] ^ rs_tab3[in[3]] ^
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	228 rs_tab4[in[4]] ^ rs_tab5[in[5]] ^ rs_tab6[in[6]] ^ rs_tab7[in[7]];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 STORE32L(tmp, out);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 #else /* !TWOFISH_ALL_TABLES */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 /* computes [y0 y1 y2 y3] = RS . [x0 x1 x2 x3 x4 x5 x6 x7] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235 static void rs_mult(const unsigned char in, unsigned char out)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	236 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 int x, y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238 for (x = 0; x < 4; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 out[x] = 0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 for (y = 0; y < 8; y++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 out[x] ^= gf_mult(in[y], RS[x][y], RS_POLY);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 /* computes h(x) */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 static void h_func(const unsigned char in, unsigned char out, unsigned char *M, int k, int offset)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251 int x;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 unsigned char y[4];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253 for (x = 0; x < 4; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254 y[x] = in[x];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256 switch (k) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 case 4:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 y[0] = (unsigned char)(sbox(1, (ulong32)y[0]) ^ M[4 * (6 + offset) + 0]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259 y[1] = (unsigned char)(sbox(0, (ulong32)y[1]) ^ M[4 * (6 + offset) + 1]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260 y[2] = (unsigned char)(sbox(0, (ulong32)y[2]) ^ M[4 * (6 + offset) + 2]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 y[3] = (unsigned char)(sbox(1, (ulong32)y[3]) ^ M[4 * (6 + offset) + 3]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262 case 3:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263 y[0] = (unsigned char)(sbox(1, (ulong32)y[0]) ^ M[4 * (4 + offset) + 0]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	264 y[1] = (unsigned char)(sbox(1, (ulong32)y[1]) ^ M[4 * (4 + offset) + 1]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	265 y[2] = (unsigned char)(sbox(0, (ulong32)y[2]) ^ M[4 * (4 + offset) + 2]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 y[3] = (unsigned char)(sbox(0, (ulong32)y[3]) ^ M[4 * (4 + offset) + 3]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	267 case 2:
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	268 y[0] = (unsigned char)(sbox(1, sbox(0, sbox(0, (ulong32)y[0]) ^ M[4 * (2 + offset) + 0]) ^ M[4 * (0 + offset) + 0]));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	269 y[1] = (unsigned char)(sbox(0, sbox(0, sbox(1, (ulong32)y[1]) ^ M[4 * (2 + offset) + 1]) ^ M[4 * (0 + offset) + 1]));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 y[2] = (unsigned char)(sbox(1, sbox(1, sbox(0, (ulong32)y[2]) ^ M[4 * (2 + offset) + 2]) ^ M[4 * (0 + offset) + 2]));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271 y[3] = (unsigned char)(sbox(0, sbox(1, sbox(1, (ulong32)y[3]) ^ M[4 * (2 + offset) + 3]) ^ M[4 * (0 + offset) + 3]));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 mds_mult(y, out);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	274 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 #ifndef TWOFISH_SMALL
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 /* for GCC we don't use pointer aliases */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 #if defined(__GNUC__)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280 #define S1 skey->twofish.S[0]
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	281 #define S2 skey->twofish.S[1]
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	282 #define S3 skey->twofish.S[2]
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	283 #define S4 skey->twofish.S[3]
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	284 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	285
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	286 /* the G function */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287 #define g_func(x, dum) (S1[byte(x,0)] ^ S2[byte(x,1)] ^ S3[byte(x,2)] ^ S4[byte(x,3)])
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 #define g1_func(x, dum) (S2[byte(x,0)] ^ S3[byte(x,1)] ^ S4[byte(x,2)] ^ S1[byte(x,3)])
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 static ulong32 _g_func(ulong32 x, symmetric_key *key)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 static ulong32 g_func(ulong32 x, symmetric_key *key)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 unsigned char g, i, y, z;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 ulong32 res;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	301 res = 0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302 for (y = 0; y < 4; y++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303 z = key->twofish.start;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 /* do unkeyed substitution */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306 g = sbox(qord[y][z++], (x >> (8*y)) & 255);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 /* first subkey */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 i = 0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	311 /* do key mixing+sbox until z==5 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312 while (z != 5) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313 g = g ^ key->twofish.S[4*i++ + y];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314 g = sbox(qord[y][z++], g);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 /* multiply g by a column of the MDS */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318 res ^= mds_column_mult(g, y);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	320 return res;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	321 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	322
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 #define g1_func(x, key) g_func(ROLc(x, 8), key)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	324
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	325 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	326 static ulong32 g_func(ulong32 x, symmetric_key *key)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	327 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328 ulong32 y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329 y = _g_func(x, key);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	330 burn_stack(sizeof(unsigned char) * 4 + sizeof(ulong32));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331 return y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	332 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	333 #endif /* LTC_CLEAN_STACK */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	334
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	335 #endif /* TWOFISH_SMALL */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	336
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	337 /**
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	338 Initialize the Twofish block cipher
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	339 @param key The symmetric key you wish to pass
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	340 @param keylen The key length in bytes
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	341 @param num_rounds The number of rounds desired (0 for default)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	342 @param skey The key in as scheduled by this function.
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	343 @return CRYPT_OK if successful
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	344 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	345 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	346 static int _twofish_setup(const unsigned char key, int keylen, int num_rounds, symmetric_key skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	347 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	348 int twofish_setup(const unsigned char key, int keylen, int num_rounds, symmetric_key skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	349 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	350 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	351 #ifndef TWOFISH_SMALL
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	352 unsigned char S[4*4], tmpx0, tmpx1;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	353 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	354 int k, x, y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	355 unsigned char tmp[4], tmp2[4], M[8*4];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	356 ulong32 A, B;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	357
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	358 LTC_ARGCHK(key != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	359 LTC_ARGCHK(skey != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	360
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	361 /* invalid arguments? */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	362 if (num_rounds != 16 && num_rounds != 0) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	363 return CRYPT_INVALID_ROUNDS;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	364 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	365
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	366 if (keylen != 16 && keylen != 24 && keylen != 32) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	367 return CRYPT_INVALID_KEYSIZE;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	368 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	369
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	370 /* k = keysize/64 [but since our keysize is in bytes...] */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	371 k = keylen / 8;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	372
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	373 /* copy the key into M */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	374 for (x = 0; x < keylen; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	375 M[x] = key[x] & 255;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	376 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	377
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	378 /* create the S[..] words */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	379 #ifndef TWOFISH_SMALL
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	380 for (x = 0; x < k; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	381 rs_mult(M+(x8), S+(x4));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	382 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	384 for (x = 0; x < k; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385 rs_mult(M+(x8), skey->twofish.S+(x4));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	386 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	387 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	388
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	389 /* make subkeys */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390 for (x = 0; x < 20; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	391 /* A = h(p * 2x, Me) */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392 for (y = 0; y < 4; y++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393 tmp[y] = x+x;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395 h_func(tmp, tmp2, M, k, 0);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 LOAD32L(A, tmp2);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	398 /* B = ROL(h(p * (2x + 1), Mo), 8) */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	399 for (y = 0; y < 4; y++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	400 tmp[y] = (unsigned char)(x+x+1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	401 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	402 h_func(tmp, tmp2, M, k, 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	403 LOAD32L(B, tmp2);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	404 B = ROLc(B, 8);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	405
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	406 /* K[2i] = A + B */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	407 skey->twofish.K[x+x] = (A + B) & 0xFFFFFFFFUL;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	409 /* K[2i+1] = (A + 2B) <<< 9 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 skey->twofish.K[x+x+1] = ROLc(B + B + A, 9);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	411 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	412
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413 #ifndef TWOFISH_SMALL
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	414 /* make the sboxes (large ram variant) */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415 if (k == 2) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 for (x = 0; x < 256; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417 tmpx0 = sbox(0, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 tmpx1 = sbox(1, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, tmpx0 ^ S[0]) ^ S[4])),0);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420 skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, tmpx1 ^ S[1]) ^ S[5])),1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	421 skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, tmpx0 ^ S[2]) ^ S[6])),2);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	422 skey->twofish.S[3][x] = mds_column_mult(sbox(0, (sbox(1, tmpx1 ^ S[3]) ^ S[7])),3);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	423 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	424 } else if (k == 3) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	425 for (x = 0; x < 256; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426 tmpx0 = sbox(0, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427 tmpx1 = sbox(1, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	428 skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, sbox(0, tmpx1 ^ S[0]) ^ S[4]) ^ S[8])),0);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	429 skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, sbox(1, tmpx1 ^ S[1]) ^ S[5]) ^ S[9])),1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	430 skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, sbox(0, tmpx0 ^ S[2]) ^ S[6]) ^ S[10])),2);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431 skey->twofish.S[3][x] = mds_column_mult(sbox(0, (sbox(1, sbox(1, tmpx0 ^ S[3]) ^ S[7]) ^ S[11])),3);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	432 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433 } else {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 for (x = 0; x < 256; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	435 tmpx0 = sbox(0, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	436 tmpx1 = sbox(1, x);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	437 skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, sbox(0, sbox(1, tmpx1 ^ S[0]) ^ S[4]) ^ S[8]) ^ S[12])),0);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	438 skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, sbox(1, sbox(1, tmpx0 ^ S[1]) ^ S[5]) ^ S[9]) ^ S[13])),1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	439 skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, sbox(0, sbox(0, tmpx0 ^ S[2]) ^ S[6]) ^ S[10]) ^ S[14])),2);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	440 skey->twofish.S[3][x] = mds_column_mult(sbox(0, (sbox(1, sbox(1, sbox(0, tmpx1 ^ S[3]) ^ S[7]) ^ S[11]) ^ S[15])),3);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	442 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	443 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	444 /* where to start in the sbox layers */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	445 /* small ram variant */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 switch (k) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	447 case 4 : skey->twofish.start = 0; break;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	448 case 3 : skey->twofish.start = 1; break;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449 default: skey->twofish.start = 2; break;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	452 return CRYPT_OK;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	453 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	454
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	455 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	456 int twofish_setup(const unsigned char key, int keylen, int num_rounds, symmetric_key skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	457 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	458 int x;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	459 x = _twofish_setup(key, keylen, num_rounds, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	460 burn_stack(sizeof(int) * 7 + sizeof(unsigned char) * 56 + sizeof(ulong32) * 2);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	461 return x;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	462 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	463 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	464
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	465 /**
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	466 Encrypts a block of text with Twofish
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	467 @param pt The input plaintext (16 bytes)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	468 @param ct The output ciphertext (16 bytes)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 @param skey The key as scheduled
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	471 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	472 static void _twofish_ecb_encrypt(const unsigned char pt, unsigned char ct, symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	473 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	474 void twofish_ecb_encrypt(const unsigned char pt, unsigned char ct, symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	475 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	476 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	477 ulong32 a,b,c,d,ta,tb,tc,td,t1,t2, *k;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	478 int r;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	479 #if !defined(TWOFISH_SMALL) && !defined(__GNUC__)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	480 ulong32 S1, S2, S3, S4;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	481 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	482
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	483 LTC_ARGCHK(pt != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	484 LTC_ARGCHK(ct != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	485 LTC_ARGCHK(skey != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	486
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	487 #if !defined(TWOFISH_SMALL) && !defined(__GNUC__)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	488 S1 = skey->twofish.S[0];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	489 S2 = skey->twofish.S[1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	490 S3 = skey->twofish.S[2];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	491 S4 = skey->twofish.S[3];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	492 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	493
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	494 LOAD32L(a,&pt[0]); LOAD32L(b,&pt[4]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	495 LOAD32L(c,&pt[8]); LOAD32L(d,&pt[12]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	496 a ^= skey->twofish.K[0];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	497 b ^= skey->twofish.K[1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	498 c ^= skey->twofish.K[2];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	499 d ^= skey->twofish.K[3];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	500
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	501 k = skey->twofish.K + 8;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	502 for (r = 8; r != 0; --r) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	503 t2 = g1_func(b, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	504 t1 = g_func(a, skey) + t2;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	505 c = RORc(c ^ (t1 + k[0]), 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	506 d = ROLc(d, 1) ^ (t2 + t1 + k[1]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	507
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	508 t2 = g1_func(d, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	509 t1 = g_func(c, skey) + t2;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	510 a = RORc(a ^ (t1 + k[2]), 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	511 b = ROLc(b, 1) ^ (t2 + t1 + k[3]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	512 k += 4;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	513 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	514
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	515 /* output with "undo last swap" */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	516 ta = c ^ skey->twofish.K[4];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	517 tb = d ^ skey->twofish.K[5];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	518 tc = a ^ skey->twofish.K[6];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	519 td = b ^ skey->twofish.K[7];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	520
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	521 /* store output */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	522 STORE32L(ta,&ct[0]); STORE32L(tb,&ct[4]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	523 STORE32L(tc,&ct[8]); STORE32L(td,&ct[12]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	524 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	525
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	526 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	527 void twofish_ecb_encrypt(const unsigned char pt, unsigned char ct, symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	528 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	529 _twofish_ecb_encrypt(pt, ct, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	530 burn_stack(sizeof(ulong32) * 10 + sizeof(int));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	531 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	532 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	533
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	534 /**
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	535 Decrypts a block of text with Twofish
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	536 @param ct The input ciphertext (16 bytes)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	537 @param pt The output plaintext (16 bytes)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	538 @param skey The key as scheduled
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	539 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	540 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	541 static void _twofish_ecb_decrypt(const unsigned char ct, unsigned char pt, symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	542 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	543 void twofish_ecb_decrypt(const unsigned char ct, unsigned char pt, symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	544 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	545 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	546 ulong32 a,b,c,d,ta,tb,tc,td,t1,t2, *k;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	547 int r;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	548 #if !defined(TWOFISH_SMALL) && !defined(__GNUC__)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	549 ulong32 S1, S2, S3, S4;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	550 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	551
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552 LTC_ARGCHK(pt != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	553 LTC_ARGCHK(ct != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	554 LTC_ARGCHK(skey != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	555
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	556 #if !defined(TWOFISH_SMALL) && !defined(__GNUC__)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	557 S1 = skey->twofish.S[0];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	558 S2 = skey->twofish.S[1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	559 S3 = skey->twofish.S[2];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	560 S4 = skey->twofish.S[3];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	561 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	562
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	563 /* load input */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	564 LOAD32L(ta,&ct[0]); LOAD32L(tb,&ct[4]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	565 LOAD32L(tc,&ct[8]); LOAD32L(td,&ct[12]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	566
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	567 /* undo undo final swap */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	568 a = tc ^ skey->twofish.K[6];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	569 b = td ^ skey->twofish.K[7];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	570 c = ta ^ skey->twofish.K[4];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	571 d = tb ^ skey->twofish.K[5];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	572
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	573 k = skey->twofish.K + 36;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	574 for (r = 8; r != 0; --r) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	575 t2 = g1_func(d, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	576 t1 = g_func(c, skey) + t2;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	577 a = ROLc(a, 1) ^ (t1 + k[2]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	578 b = RORc(b ^ (t2 + t1 + k[3]), 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	579
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	580 t2 = g1_func(b, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	581 t1 = g_func(a, skey) + t2;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	582 c = ROLc(c, 1) ^ (t1 + k[0]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	583 d = RORc(d ^ (t2 + t1 + k[1]), 1);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	584 k -= 4;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	585 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	586
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	587 /* pre-white */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	588 a ^= skey->twofish.K[0];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	589 b ^= skey->twofish.K[1];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	590 c ^= skey->twofish.K[2];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	591 d ^= skey->twofish.K[3];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	592
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	593 /* store */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	594 STORE32L(a, &pt[0]); STORE32L(b, &pt[4]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	595 STORE32L(c, &pt[8]); STORE32L(d, &pt[12]);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	596 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	597
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	598 #ifdef LTC_CLEAN_STACK
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	599 void twofish_ecb_decrypt(const unsigned char ct, unsigned char pt, symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	600 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	601 _twofish_ecb_decrypt(ct, pt, skey);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	602 burn_stack(sizeof(ulong32) * 10 + sizeof(int));
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	603 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	604 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	605
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	606 /**
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	607 Performs a self-test of the Twofish block cipher
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	608 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	609 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	610 int twofish_test(void)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	611 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	612 #ifndef LTC_TEST
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	613 return CRYPT_NOP;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	614 #else
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	615 static const struct {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	616 int keylen;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	617 unsigned char key[32], pt[16], ct[16];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	618 } tests[] = {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	619 { 16,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	620 { 0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	621 0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	622 { 0xD4, 0x91, 0xDB, 0x16, 0xE7, 0xB1, 0xC3, 0x9E,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	623 0x86, 0xCB, 0x08, 0x6B, 0x78, 0x9F, 0x54, 0x19 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	624 { 0x01, 0x9F, 0x98, 0x09, 0xDE, 0x17, 0x11, 0x85,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	625 0x8F, 0xAA, 0xC3, 0xA3, 0xBA, 0x20, 0xFB, 0xC3 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	626 }, {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	627 24,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	628 { 0x88, 0xB2, 0xB2, 0x70, 0x6B, 0x10, 0x5E, 0x36,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	629 0xB4, 0x46, 0xBB, 0x6D, 0x73, 0x1A, 0x1E, 0x88,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	630 0xEF, 0xA7, 0x1F, 0x78, 0x89, 0x65, 0xBD, 0x44 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	631 { 0x39, 0xDA, 0x69, 0xD6, 0xBA, 0x49, 0x97, 0xD5,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	632 0x85, 0xB6, 0xDC, 0x07, 0x3C, 0xA3, 0x41, 0xB2 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	633 { 0x18, 0x2B, 0x02, 0xD8, 0x14, 0x97, 0xEA, 0x45,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	634 0xF9, 0xDA, 0xAC, 0xDC, 0x29, 0x19, 0x3A, 0x65 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	635 }, {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	636 32,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	637 { 0xD4, 0x3B, 0xB7, 0x55, 0x6E, 0xA3, 0x2E, 0x46,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	638 0xF2, 0xA2, 0x82, 0xB7, 0xD4, 0x5B, 0x4E, 0x0D,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	639 0x57, 0xFF, 0x73, 0x9D, 0x4D, 0xC9, 0x2C, 0x1B,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	640 0xD7, 0xFC, 0x01, 0x70, 0x0C, 0xC8, 0x21, 0x6F },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	641 { 0x90, 0xAF, 0xE9, 0x1B, 0xB2, 0x88, 0x54, 0x4F,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	642 0x2C, 0x32, 0xDC, 0x23, 0x9B, 0x26, 0x35, 0xE6 },
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	643 { 0x6C, 0xB4, 0x56, 0x1C, 0x40, 0xBF, 0x0A, 0x97,
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	644 0x05, 0x93, 0x1C, 0xB6, 0xD4, 0x08, 0xE7, 0xFA }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	645 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	646 };
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	647
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	648
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	649 symmetric_key key;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	650 unsigned char tmp[2][16];
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	651 int err, i, y;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	652
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	653 for (i = 0; i < (int)(sizeof(tests)/sizeof(tests[0])); i++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	654 if ((err = twofish_setup(tests[i].key, tests[i].keylen, 0, &key)) != CRYPT_OK) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	655 return err;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	656 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	657 twofish_ecb_encrypt(tests[i].pt, tmp[0], &key);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	658 twofish_ecb_decrypt(tmp[0], tmp[1], &key);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	659 if (memcmp(tmp[0], tests[i].ct, 16) != 0 \|\| memcmp(tmp[1], tests[i].pt, 16) != 0) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	660 return CRYPT_FAIL_TESTVECTOR;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	661 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	662 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	663 for (y = 0; y < 16; y++) tmp[0][y] = 0;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	664 for (y = 0; y < 1000; y++) twofish_ecb_encrypt(tmp[0], tmp[0], &key);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	665 for (y = 0; y < 1000; y++) twofish_ecb_decrypt(tmp[0], tmp[0], &key);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	666 for (y = 0; y < 16; y++) if (tmp[0][y] != 0) return CRYPT_FAIL_TESTVECTOR;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	667 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	668 return CRYPT_OK;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	669 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	670 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	671
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	672 /** Terminate the context
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	673 @param skey The scheduled key
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	674 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	675 void twofish_done(symmetric_key *skey)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	676 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	677 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	678
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	679 /**
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	680 Gets suitable key size
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	681 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable.
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	682 @return CRYPT_OK if the input key size is acceptable.
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	683 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	684 int twofish_keysize(int *keysize)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	685 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	686 LTC_ARGCHK(keysize);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	687 if (*keysize < 16)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	688 return CRYPT_INVALID_KEYSIZE;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	689 if (*keysize < 24) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	690 *keysize = 16;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	691 return CRYPT_OK;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	692 } else if (*keysize < 32) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	693 *keysize = 24;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	694 return CRYPT_OK;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	695 } else {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	696 *keysize = 32;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	697 return CRYPT_OK;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	698 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	699 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	700
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	701 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	702
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	703
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	704
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	705
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	706 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/twofish/twofish.c,v $ */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	707 /* $Revision: 1.8 $ */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3) Matt Johnston <matt@ucc.asn.au> parents: diff changeset	708 /* $Date: 2005/05/05 14:35:58 $ */

Mercurial > dropbear

annotate libtomcrypt/src/ciphers/twofish/twofish.c @ 308:6e5f8ce73bf2 ucc-axis-hack