dropbear: src/ciphers/skipjack.c annotate

annotate src/ciphers/skipjack.c @ 210:4768b55c5240 libtomcrypt

propagate from branch 'au.asn.ucc.matt.ltc-orig' (head 33c416b902f1a44913d825bae7ad9a160f703ed3) to branch 'au.asn.ucc.matt.dropbear.ltc' (head 4d6aec6e6121e13f68c11c149b6579c41cb63e74)

author	Matt Johnston <matt@ucc.asn.au>
date	Wed, 06 Jul 2005 12:10:23 +0000
parents	39d5d58461d6
children

rev	line source
191 1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 *
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 * LibTomCrypt is a library that provides various cryptographic
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * algorithms in a highly modular and flexible manner.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 *
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 * The library is free for all purposes without any express
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * guarantee it works.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 *
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * Tom St Denis, [email protected], http://libtomcrypt.org
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 @file skipjack.c
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 Skipjack Implementation by Tom St Denis
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 #include "tomcrypt.h"
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 #ifdef SKIPJACK
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 const struct ltc_cipher_descriptor skipjack_desc =
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 "skipjack",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 17,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24 10, 10, 8, 32,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 &skipjack_setup,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 &skipjack_ecb_encrypt,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 &skipjack_ecb_decrypt,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 &skipjack_test,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 &skipjack_done,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 &skipjack_keysize,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 NULL, NULL, NULL, NULL, NULL, NULL, NULL
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 static const unsigned char sbox[256] = {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 0xa3,0xd7,0x09,0x83,0xf8,0x48,0xf6,0xf4,0xb3,0x21,0x15,0x78,0x99,0xb1,0xaf,0xf9,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 0xe7,0x2d,0x4d,0x8a,0xce,0x4c,0xca,0x2e,0x52,0x95,0xd9,0x1e,0x4e,0x38,0x44,0x28,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 0x0a,0xdf,0x02,0xa0,0x17,0xf1,0x60,0x68,0x12,0xb7,0x7a,0xc3,0xe9,0xfa,0x3d,0x53,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38 0x96,0x84,0x6b,0xba,0xf2,0x63,0x9a,0x19,0x7c,0xae,0xe5,0xf5,0xf7,0x16,0x6a,0xa2,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39 0x39,0xb6,0x7b,0x0f,0xc1,0x93,0x81,0x1b,0xee,0xb4,0x1a,0xea,0xd0,0x91,0x2f,0xb8,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	40 0x55,0xb9,0xda,0x85,0x3f,0x41,0xbf,0xe0,0x5a,0x58,0x80,0x5f,0x66,0x0b,0xd8,0x90,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41 0x35,0xd5,0xc0,0xa7,0x33,0x06,0x65,0x69,0x45,0x00,0x94,0x56,0x6d,0x98,0x9b,0x76,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 0x97,0xfc,0xb2,0xc2,0xb0,0xfe,0xdb,0x20,0xe1,0xeb,0xd6,0xe4,0xdd,0x47,0x4a,0x1d,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 0x42,0xed,0x9e,0x6e,0x49,0x3c,0xcd,0x43,0x27,0xd2,0x07,0xd4,0xde,0xc7,0x67,0x18,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44 0x89,0xcb,0x30,0x1f,0x8d,0xc6,0x8f,0xaa,0xc8,0x74,0xdc,0xc9,0x5d,0x5c,0x31,0xa4,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 0x70,0x88,0x61,0x2c,0x9f,0x0d,0x2b,0x87,0x50,0x82,0x54,0x64,0x26,0x7d,0x03,0x40,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 0x34,0x4b,0x1c,0x73,0xd1,0xc4,0xfd,0x3b,0xcc,0xfb,0x7f,0xab,0xe6,0x3e,0x5b,0xa5,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 0xad,0x04,0x23,0x9c,0x14,0x51,0x22,0xf0,0x29,0x79,0x71,0x7e,0xff,0x8c,0x0e,0xe2,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 0x0c,0xef,0xbc,0x72,0x75,0x6f,0x37,0xa1,0xec,0xd3,0x8e,0x62,0x8b,0x86,0x10,0xe8,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 0x08,0x77,0x11,0xbe,0x92,0x4f,0x24,0xc5,0x32,0x36,0x9d,0xcf,0xf3,0xa6,0xbb,0xac,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50 0x5e,0x6c,0xa9,0x13,0x57,0x25,0xb5,0xe3,0xbd,0xa8,0x3a,0x01,0x05,0x59,0x2a,0x46
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	51 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	52
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	53 /* simple x + 1 (mod 10) in one step. */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	54 static const int keystep[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	55
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56 /* simple x - 1 (mod 10) in one step */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	57 static const int ikeystep[] = { 9, 0, 1, 2, 3, 4, 5, 6, 7, 8 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	58
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60 Initialize the Skipjack block cipher
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	61 @param key The symmetric key you wish to pass
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	62 @param keylen The key length in bytes
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	63 @param num_rounds The number of rounds desired (0 for default)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64 @param skey The key in as scheduled by this function.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65 @return CRYPT_OK if successful
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 int skipjack_setup(const unsigned char key, int keylen, int num_rounds, symmetric_key skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69 int x;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71 LTC_ARGCHK(key != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72 LTC_ARGCHK(skey != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	73
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74 if (keylen != 10) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75 return CRYPT_INVALID_KEYSIZE;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	78 if (num_rounds != 32 && num_rounds != 0) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	79 return CRYPT_INVALID_ROUNDS;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	80 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	82 /* make sure the key is in range for platforms where CHAR_BIT != 8 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	83 for (x = 0; x < 10; x++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	84 skey->skipjack.key[x] = key[x] & 255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	85 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	87 return CRYPT_OK;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	89
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90 #define RULE_A \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	91 tmp = g_func(w1, &kp, skey->skipjack.key); \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 w1 = tmp ^ w4 ^ x; \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93 w4 = w3; w3 = w2; \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94 w2 = tmp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 #define RULE_B \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 tmp = g_func(w1, &kp, skey->skipjack.key); \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98 tmp1 = w4; w4 = w3; \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 w3 = w1 ^ w2 ^ x; \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 w1 = tmp1; w2 = tmp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 #define RULE_A1 \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 tmp = w1 ^ w2 ^ x; \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104 w1 = ig_func(w2, &kp, skey->skipjack.key); \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 w2 = w3; w3 = w4; w4 = tmp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107 #define RULE_B1 \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108 tmp = ig_func(w2, &kp, skey->skipjack.key); \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 w2 = tmp ^ w3 ^ x; \
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 w3 = w4; w4 = w1; w1 = tmp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 static unsigned g_func(unsigned w, int kp, unsigned char key)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114 unsigned char g1,g2;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	116 g1 = (w >> 8) & 255; g2 = w & 255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	117 g1 ^= sbox[g2^key[kp]]; kp = keystep[*kp];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	118 g2 ^= sbox[g1^key[kp]]; kp = keystep[*kp];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119 g1 ^= sbox[g2^key[kp]]; kp = keystep[*kp];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 g2 ^= sbox[g1^key[kp]]; kp = keystep[*kp];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	121 return ((unsigned)g1<<8)\|(unsigned)g2;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	122 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	124 static unsigned ig_func(unsigned w, int kp, unsigned char key)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	125 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	126 unsigned char g1,g2;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	128 g1 = (w >> 8) & 255; g2 = w & 255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 kp = ikeystep[kp]; g2 ^= sbox[g1^key[*kp]];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	130 kp = ikeystep[kp]; g1 ^= sbox[g2^key[*kp]];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131 kp = ikeystep[kp]; g2 ^= sbox[g1^key[*kp]];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 kp = ikeystep[kp]; g1 ^= sbox[g2^key[*kp]];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	133 return ((unsigned)g1<<8)\|(unsigned)g2;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	134 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	135
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 Encrypts a block of text with Skipjack
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 @param pt The input plaintext (8 bytes)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139 @param ct The output ciphertext (8 bytes)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	140 @param skey The key as scheduled
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	141 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	142 #ifdef LTC_CLEAN_STACK
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143 static void _skipjack_ecb_encrypt(const unsigned char pt, unsigned char ct, symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	144 #else
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145 void skipjack_ecb_encrypt(const unsigned char pt, unsigned char ct, symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 unsigned w1,w2,w3,w4,tmp,tmp1;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 int x, kp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 LTC_ARGCHK(pt != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 LTC_ARGCHK(ct != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 LTC_ARGCHK(skey != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 /* load block */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 w1 = ((unsigned)pt[0]<<8)\|pt[1];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157 w2 = ((unsigned)pt[2]<<8)\|pt[3];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158 w3 = ((unsigned)pt[4]<<8)\|pt[5];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 w4 = ((unsigned)pt[6]<<8)\|pt[7];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	161 /* 8 rounds of RULE A */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 for (x = 1, kp = 0; x < 9; x++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 RULE_A;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	164 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	166 /* 8 rounds of RULE B */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 for (; x < 17; x++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168 RULE_B;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 /* 8 rounds of RULE A */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 for (; x < 25; x++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 RULE_A;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 /* 8 rounds of RULE B */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177 for (; x < 33; x++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178 RULE_B;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	179 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	180
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	181 /* store block */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 ct[0] = (w1>>8)&255; ct[1] = w1&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	183 ct[2] = (w2>>8)&255; ct[3] = w2&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 ct[4] = (w3>>8)&255; ct[5] = w3&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	185 ct[6] = (w4>>8)&255; ct[7] = w4&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 #ifdef LTC_CLEAN_STACK
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 void skipjack_ecb_encrypt(const unsigned char pt, unsigned char ct, symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 _skipjack_ecb_encrypt(pt, ct, skey);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192 burn_stack(sizeof(unsigned) * 8 + sizeof(int) * 2);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 Decrypts a block of text with Skipjack
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 @param ct The input ciphertext (8 bytes)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 @param pt The output plaintext (8 bytes)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 @param skey The key as scheduled
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	202 #ifdef LTC_CLEAN_STACK
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 static void _skipjack_ecb_decrypt(const unsigned char ct, unsigned char pt, symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 #else
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 void skipjack_ecb_decrypt(const unsigned char ct, unsigned char pt, symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208 unsigned w1,w2,w3,w4,tmp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 int x, kp;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 LTC_ARGCHK(pt != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 LTC_ARGCHK(ct != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 LTC_ARGCHK(skey != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 /* load block */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 w1 = ((unsigned)ct[0]<<8)\|ct[1];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 w2 = ((unsigned)ct[2]<<8)\|ct[3];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218 w3 = ((unsigned)ct[4]<<8)\|ct[5];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 w4 = ((unsigned)ct[6]<<8)\|ct[7];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 /* 8 rounds of RULE B^-1
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 Note the value "kp = 8" comes from "kp = (32 * 4) mod 10" where 32*4 is 128 which mod 10 is 8
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 for (x = 32, kp = 8; x > 24; x--) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 RULE_B1;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	228
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 /* 8 rounds of RULE A^-1 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 for (; x > 16; x--) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231 RULE_A1;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235 /* 8 rounds of RULE B^-1 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	236 for (; x > 8; x--) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 RULE_B1;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 /* 8 rounds of RULE A^-1 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 for (; x > 0; x--) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 RULE_A1;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245 /* store block */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 pt[0] = (w1>>8)&255; pt[1] = w1&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 pt[2] = (w2>>8)&255; pt[3] = w2&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 pt[4] = (w3>>8)&255; pt[5] = w3&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 pt[6] = (w4>>8)&255; pt[7] = w4&255;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 #ifdef LTC_CLEAN_STACK
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253 void skipjack_ecb_decrypt(const unsigned char ct, unsigned char pt, symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255 _skipjack_ecb_decrypt(ct, pt, skey);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256 burn_stack(sizeof(unsigned) * 7 + sizeof(int) * 2);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	260 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	261 Performs a self-test of the Skipjack block cipher
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	262 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	264 int skipjack_test(void)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	265 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 #ifndef LTC_TEST
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	267 return CRYPT_NOP;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	268 #else
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	269 static const struct {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 unsigned char key[10], pt[8], ct[8];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	271 } tests[] = {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 { 0x00, 0x99, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11 },
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	274 { 0x33, 0x22, 0x11, 0x00, 0xdd, 0xcc, 0xbb, 0xaa },
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	275 { 0x25, 0x87, 0xca, 0xe2, 0x7a, 0x12, 0xd3, 0x00 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	277 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	278 unsigned char buf[2][8];
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	279 int x, y, err;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	280 symmetric_key key;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	281
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	282 for (x = 0; x < (int)(sizeof(tests) / sizeof(tests[0])); x++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	283 /* setup key */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	284 if ((err = skipjack_setup(tests[x].key, 10, 0, &key)) != CRYPT_OK) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	285 return err;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	286 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	287
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	288 /* encrypt and decrypt */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	289 skipjack_ecb_encrypt(tests[x].pt, buf[0], &key);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	290 skipjack_ecb_decrypt(buf[0], buf[1], &key);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	291
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	292 /* compare */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	293 if (memcmp(buf[0], tests[x].ct, 8) != 0 \|\| memcmp(buf[1], tests[x].pt, 8) != 0) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	294 return CRYPT_FAIL_TESTVECTOR;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	295 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	296
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	297 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	298 for (y = 0; y < 8; y++) buf[0][y] = 0;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	299 for (y = 0; y < 1000; y++) skipjack_ecb_encrypt(buf[0], buf[0], &key);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	300 for (y = 0; y < 1000; y++) skipjack_ecb_decrypt(buf[0], buf[0], &key);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	301 for (y = 0; y < 8; y++) if (buf[0][y] != 0) return CRYPT_FAIL_TESTVECTOR;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	302 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	303
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	304 return CRYPT_OK;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	305 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	306 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	307
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	308 /** Terminate the context
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	309 @param skey The scheduled key
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	310 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	311 void skipjack_done(symmetric_key *skey)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	312 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	313 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	314
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	315 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	316 Gets suitable key size
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	317 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	318 @return CRYPT_OK if the input key size is acceptable.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	319 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	320 int skipjack_keysize(int *keysize)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	321 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	322 LTC_ARGCHK(keysize != NULL);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	323 if (*keysize < 10) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	324 return CRYPT_INVALID_KEYSIZE;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	325 } else if (*keysize > 10) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	326 *keysize = 10;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	327 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	328 return CRYPT_OK;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	329 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	330
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc Matt Johnston <matt@ucc.asn.au> parents: diff changeset	331 #endif
209 39d5d58461d6 Import of libtomcrypt 1.05 Matt Johnston <matt@ucc.asn.au> parents: 191 diff changeset	332
39d5d58461d6 Import of libtomcrypt 1.05 Matt Johnston <matt@ucc.asn.au> parents: 191 diff changeset	333 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/skipjack.c,v $ */
39d5d58461d6 Import of libtomcrypt 1.05 Matt Johnston <matt@ucc.asn.au> parents: 191 diff changeset	334 /* $Revision: 1.7 $ */
39d5d58461d6 Import of libtomcrypt 1.05 Matt Johnston <matt@ucc.asn.au> parents: 191 diff changeset	335 /* $Date: 2005/05/05 14:35:58 $ */

Mercurial > dropbear

annotate src/ciphers/skipjack.c @ 210:4768b55c5240 libtomcrypt