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wolfSSL SSL/TLS library, support up to TLS1.3

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wolfcrypt/src/idea.c@13:f67a6c6013ca, 2017-08-22 (annotated)

Committer:
wolfSSL
Date:
Tue Aug 22 10:48:22 2017 +0000
Revision:
13:f67a6c6013ca
wolfSSL3.12.0 with TLS1.3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 13:f67a6c6013ca 1 /* idea.c
wolfSSL 13:f67a6c6013ca 2 *
wolfSSL 13:f67a6c6013ca 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 13:f67a6c6013ca 4 *
wolfSSL 13:f67a6c6013ca 5 * This file is part of wolfSSL.
wolfSSL 13:f67a6c6013ca 6 *
wolfSSL 13:f67a6c6013ca 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 13:f67a6c6013ca 8 * it under the terms of the GNU General Public License as published by
wolfSSL 13:f67a6c6013ca 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 13:f67a6c6013ca 10 * (at your option) any later version.
wolfSSL 13:f67a6c6013ca 11 *
wolfSSL 13:f67a6c6013ca 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 13:f67a6c6013ca 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 13:f67a6c6013ca 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 13:f67a6c6013ca 15 * GNU General Public License for more details.
wolfSSL 13:f67a6c6013ca 16 *
wolfSSL 13:f67a6c6013ca 17 * You should have received a copy of the GNU General Public License
wolfSSL 13:f67a6c6013ca 18 * along with this program; if not, write to the Free Software
wolfSSL 13:f67a6c6013ca 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 13:f67a6c6013ca 20 */
wolfSSL 13:f67a6c6013ca 21
wolfSSL 13:f67a6c6013ca 22
wolfSSL 13:f67a6c6013ca 23 #ifdef HAVE_CONFIG_H
wolfSSL 13:f67a6c6013ca 24 #include <config.h>
wolfSSL 13:f67a6c6013ca 25 #endif
wolfSSL 13:f67a6c6013ca 26
wolfSSL 13:f67a6c6013ca 27 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 13:f67a6c6013ca 28
wolfSSL 13:f67a6c6013ca 29 #ifdef HAVE_IDEA
wolfSSL 13:f67a6c6013ca 30
wolfSSL 13:f67a6c6013ca 31 #include <wolfssl/wolfcrypt/idea.h>
wolfSSL 13:f67a6c6013ca 32
wolfSSL 13:f67a6c6013ca 33 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 13:f67a6c6013ca 34 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 13:f67a6c6013ca 35
wolfSSL 13:f67a6c6013ca 36 #ifdef NO_INLINE
wolfSSL 13:f67a6c6013ca 37 #include <wolfssl/wolfcrypt/misc.h>
wolfSSL 13:f67a6c6013ca 38 #else
wolfSSL 13:f67a6c6013ca 39 #define WOLFSSL_MISC_INCLUDED
wolfSSL 13:f67a6c6013ca 40 #include <wolfcrypt/src/misc.c>
wolfSSL 13:f67a6c6013ca 41 #endif
wolfSSL 13:f67a6c6013ca 42
wolfSSL 13:f67a6c6013ca 43 /* multiplication of x and y modulo 2^16+1
wolfSSL 13:f67a6c6013ca 44 * IDEA specify a special case when an entry value is 0 ( x or y)
wolfSSL 13:f67a6c6013ca 45 * then it must be replaced by 2^16
wolfSSL 13:f67a6c6013ca 46 */
wolfSSL 13:f67a6c6013ca 47 static INLINE word16 idea_mult(word16 x, word16 y)
wolfSSL 13:f67a6c6013ca 48 {
wolfSSL 13:f67a6c6013ca 49 long mul, res;
wolfSSL 13:f67a6c6013ca 50
wolfSSL 13:f67a6c6013ca 51 mul = (long)x * (long)y;
wolfSSL 13:f67a6c6013ca 52 if (mul) {
wolfSSL 13:f67a6c6013ca 53 res = (mul & IDEA_MASK) - ((word32)mul >> 16);
wolfSSL 13:f67a6c6013ca 54 if (res <= 0)
wolfSSL 13:f67a6c6013ca 55 res += IDEA_MODULO;
wolfSSL 13:f67a6c6013ca 56
wolfSSL 13:f67a6c6013ca 57 return (word16) (res & IDEA_MASK);
wolfSSL 13:f67a6c6013ca 58 }
wolfSSL 13:f67a6c6013ca 59
wolfSSL 13:f67a6c6013ca 60 if (!x)
wolfSSL 13:f67a6c6013ca 61 return ((IDEA_MODULO - y) & IDEA_MASK);
wolfSSL 13:f67a6c6013ca 62
wolfSSL 13:f67a6c6013ca 63 /* !y */
wolfSSL 13:f67a6c6013ca 64 return ((IDEA_MODULO - x) & IDEA_MASK);
wolfSSL 13:f67a6c6013ca 65 }
wolfSSL 13:f67a6c6013ca 66
wolfSSL 13:f67a6c6013ca 67 /* compute 1/a modulo 2^16+1 using Extended euclidean algorithm
wolfSSL 13:f67a6c6013ca 68 * adapted from fp_invmod */
wolfSSL 13:f67a6c6013ca 69 static INLINE word16 idea_invmod(word16 x)
wolfSSL 13:f67a6c6013ca 70 {
wolfSSL 13:f67a6c6013ca 71 int u, v, b, d;
wolfSSL 13:f67a6c6013ca 72
wolfSSL 13:f67a6c6013ca 73 if (x <= 1)
wolfSSL 13:f67a6c6013ca 74 return x;
wolfSSL 13:f67a6c6013ca 75
wolfSSL 13:f67a6c6013ca 76 u = IDEA_MODULO;
wolfSSL 13:f67a6c6013ca 77 v = x;
wolfSSL 13:f67a6c6013ca 78 d = 1;
wolfSSL 13:f67a6c6013ca 79 b = 0;
wolfSSL 13:f67a6c6013ca 80
wolfSSL 13:f67a6c6013ca 81 do {
wolfSSL 13:f67a6c6013ca 82 while (!(u & 1)) {
wolfSSL 13:f67a6c6013ca 83 u >>= 1;
wolfSSL 13:f67a6c6013ca 84 if (b & 1)
wolfSSL 13:f67a6c6013ca 85 b -= IDEA_MODULO;
wolfSSL 13:f67a6c6013ca 86 b >>= 1;
wolfSSL 13:f67a6c6013ca 87 }
wolfSSL 13:f67a6c6013ca 88
wolfSSL 13:f67a6c6013ca 89 while (!(v & 1)) {
wolfSSL 13:f67a6c6013ca 90 v >>= 1;
wolfSSL 13:f67a6c6013ca 91 if (d & 1) {
wolfSSL 13:f67a6c6013ca 92 d -= IDEA_MODULO;
wolfSSL 13:f67a6c6013ca 93 }
wolfSSL 13:f67a6c6013ca 94 d >>= 1;
wolfSSL 13:f67a6c6013ca 95 }
wolfSSL 13:f67a6c6013ca 96
wolfSSL 13:f67a6c6013ca 97 if (u >= v) {
wolfSSL 13:f67a6c6013ca 98 u -= v;
wolfSSL 13:f67a6c6013ca 99 b -= d;
wolfSSL 13:f67a6c6013ca 100 } else {
wolfSSL 13:f67a6c6013ca 101 v -= u;
wolfSSL 13:f67a6c6013ca 102 d -= b;
wolfSSL 13:f67a6c6013ca 103 }
wolfSSL 13:f67a6c6013ca 104 } while (u != 0);
wolfSSL 13:f67a6c6013ca 105
wolfSSL 13:f67a6c6013ca 106 /* d is now the inverse, put positive value if required */
wolfSSL 13:f67a6c6013ca 107 while (d < 0)
wolfSSL 13:f67a6c6013ca 108 d += IDEA_MODULO;
wolfSSL 13:f67a6c6013ca 109
wolfSSL 13:f67a6c6013ca 110 /* d must be < IDEA_MODULO */
wolfSSL 13:f67a6c6013ca 111 while (d >= (int)IDEA_MODULO)
wolfSSL 13:f67a6c6013ca 112 d -= IDEA_MODULO;
wolfSSL 13:f67a6c6013ca 113
wolfSSL 13:f67a6c6013ca 114 return (word16)(d & IDEA_MASK);
wolfSSL 13:f67a6c6013ca 115 }
wolfSSL 13:f67a6c6013ca 116
wolfSSL 13:f67a6c6013ca 117 /* generate the 52 16-bits key sub-blocks from the 128 key */
wolfSSL 13:f67a6c6013ca 118 int wc_IdeaSetKey(Idea *idea, const byte* key, word16 keySz,
wolfSSL 13:f67a6c6013ca 119 const byte *iv, int dir)
wolfSSL 13:f67a6c6013ca 120 {
wolfSSL 13:f67a6c6013ca 121 word16 idx = 0;
wolfSSL 13:f67a6c6013ca 122 word32 t;
wolfSSL 13:f67a6c6013ca 123 short i;
wolfSSL 13:f67a6c6013ca 124
wolfSSL 13:f67a6c6013ca 125 if (idea == NULL || key == NULL || keySz != IDEA_KEY_SIZE ||
wolfSSL 13:f67a6c6013ca 126 (dir != IDEA_ENCRYPTION && dir != IDEA_DECRYPTION))
wolfSSL 13:f67a6c6013ca 127 return BAD_FUNC_ARG;
wolfSSL 13:f67a6c6013ca 128
wolfSSL 13:f67a6c6013ca 129 /* initial key schedule for 0 -> 7 */
wolfSSL 13:f67a6c6013ca 130 for (i = 0; i < IDEA_ROUNDS; i++) {
wolfSSL 13:f67a6c6013ca 131 idea->skey[i] = (word16)key[idx++] << 8;
wolfSSL 13:f67a6c6013ca 132 idea->skey[i] |= (word16)key[idx++];
wolfSSL 13:f67a6c6013ca 133 }
wolfSSL 13:f67a6c6013ca 134
wolfSSL 13:f67a6c6013ca 135 /* shift phase key schedule for 8 -> 51 */
wolfSSL 13:f67a6c6013ca 136 for (i = IDEA_ROUNDS; i < IDEA_SK_NUM; i++) {
wolfSSL 13:f67a6c6013ca 137 t = (word32)idea->skey[((i+1) & 7) ? i-7 : i-15] << 9;
wolfSSL 13:f67a6c6013ca 138 t |= (word32)idea->skey[((i+2) & 7) < 2 ? i-14 : i-6] >> 7;
wolfSSL 13:f67a6c6013ca 139 idea->skey[i] = (word16)(t & IDEA_MASK);
wolfSSL 13:f67a6c6013ca 140 }
wolfSSL 13:f67a6c6013ca 141
wolfSSL 13:f67a6c6013ca 142 /* compute decryption key from encryption key */
wolfSSL 13:f67a6c6013ca 143 if (dir == IDEA_DECRYPTION) {
wolfSSL 13:f67a6c6013ca 144 word16 enckey[IDEA_SK_NUM];
wolfSSL 13:f67a6c6013ca 145
wolfSSL 13:f67a6c6013ca 146 /* put encryption key in tmp buffer */
wolfSSL 13:f67a6c6013ca 147 XMEMCPY(enckey, idea->skey, sizeof(idea->skey));
wolfSSL 13:f67a6c6013ca 148
wolfSSL 13:f67a6c6013ca 149 idx = 0;
wolfSSL 13:f67a6c6013ca 150
wolfSSL 13:f67a6c6013ca 151 idea->skey[6*IDEA_ROUNDS] = idea_invmod(enckey[idx++]);
wolfSSL 13:f67a6c6013ca 152 idea->skey[6*IDEA_ROUNDS+1] = (IDEA_2EXP16 - enckey[idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 153 idea->skey[6*IDEA_ROUNDS+2] = (IDEA_2EXP16 - enckey[idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 154 idea->skey[6*IDEA_ROUNDS+3] = idea_invmod(enckey[idx++]);
wolfSSL 13:f67a6c6013ca 155
wolfSSL 13:f67a6c6013ca 156 for (i = 6*(IDEA_ROUNDS-1); i >= 0; i -= 6) {
wolfSSL 13:f67a6c6013ca 157 idea->skey[i+4] = enckey[idx++];
wolfSSL 13:f67a6c6013ca 158 idea->skey[i+5] = enckey[idx++];
wolfSSL 13:f67a6c6013ca 159
wolfSSL 13:f67a6c6013ca 160 idea->skey[i] = idea_invmod(enckey[idx++]);
wolfSSL 13:f67a6c6013ca 161 if (i) {
wolfSSL 13:f67a6c6013ca 162 idea->skey[i+2] = (IDEA_2EXP16 - enckey[idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 163 idea->skey[i+1] = (IDEA_2EXP16 - enckey[idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 164 }
wolfSSL 13:f67a6c6013ca 165 else {
wolfSSL 13:f67a6c6013ca 166 idea->skey[1] = (IDEA_2EXP16 - enckey[idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 167 idea->skey[2] = (IDEA_2EXP16 - enckey[idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 168 }
wolfSSL 13:f67a6c6013ca 169
wolfSSL 13:f67a6c6013ca 170 idea->skey[i+3] = idea_invmod(enckey[idx++]);
wolfSSL 13:f67a6c6013ca 171 }
wolfSSL 13:f67a6c6013ca 172
wolfSSL 13:f67a6c6013ca 173 /* erase temporary buffer */
wolfSSL 13:f67a6c6013ca 174 ForceZero(enckey, sizeof(enckey));
wolfSSL 13:f67a6c6013ca 175 }
wolfSSL 13:f67a6c6013ca 176
wolfSSL 13:f67a6c6013ca 177 /* set the iv */
wolfSSL 13:f67a6c6013ca 178 return wc_IdeaSetIV(idea, iv);
wolfSSL 13:f67a6c6013ca 179 }
wolfSSL 13:f67a6c6013ca 180
wolfSSL 13:f67a6c6013ca 181 /* set the IV in the Idea key structure */
wolfSSL 13:f67a6c6013ca 182 int wc_IdeaSetIV(Idea *idea, const byte* iv)
wolfSSL 13:f67a6c6013ca 183 {
wolfSSL 13:f67a6c6013ca 184 if (idea == NULL)
wolfSSL 13:f67a6c6013ca 185 return BAD_FUNC_ARG;
wolfSSL 13:f67a6c6013ca 186
wolfSSL 13:f67a6c6013ca 187 if (iv != NULL)
wolfSSL 13:f67a6c6013ca 188 XMEMCPY(idea->reg, iv, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 189 else
wolfSSL 13:f67a6c6013ca 190 XMEMSET(idea->reg, 0, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 191
wolfSSL 13:f67a6c6013ca 192 return 0;
wolfSSL 13:f67a6c6013ca 193 }
wolfSSL 13:f67a6c6013ca 194
wolfSSL 13:f67a6c6013ca 195 /* encryption/decryption for a block (64 bits)
wolfSSL 13:f67a6c6013ca 196 */
wolfSSL 13:f67a6c6013ca 197 int wc_IdeaCipher(Idea *idea, byte* out, const byte* in)
wolfSSL 13:f67a6c6013ca 198 {
wolfSSL 13:f67a6c6013ca 199 word32 t1, t2;
wolfSSL 13:f67a6c6013ca 200 word16 i, skey_idx = 0, idx = 0;
wolfSSL 13:f67a6c6013ca 201 word16 x[4];
wolfSSL 13:f67a6c6013ca 202
wolfSSL 13:f67a6c6013ca 203 if (idea == NULL || out == NULL || in == NULL) {
wolfSSL 13:f67a6c6013ca 204 return BAD_FUNC_ARG;
wolfSSL 13:f67a6c6013ca 205 }
wolfSSL 13:f67a6c6013ca 206
wolfSSL 13:f67a6c6013ca 207 /* put input byte block in word16 */
wolfSSL 13:f67a6c6013ca 208 for (i = 0; i < IDEA_BLOCK_SIZE/2; i++) {
wolfSSL 13:f67a6c6013ca 209 x[i] = (word16)in[idx++] << 8;
wolfSSL 13:f67a6c6013ca 210 x[i] |= (word16)in[idx++];
wolfSSL 13:f67a6c6013ca 211 }
wolfSSL 13:f67a6c6013ca 212
wolfSSL 13:f67a6c6013ca 213 for (i = 0; i < IDEA_ROUNDS; i++) {
wolfSSL 13:f67a6c6013ca 214 x[0] = idea_mult(x[0], idea->skey[skey_idx++]);
wolfSSL 13:f67a6c6013ca 215 x[1] = ((word32)x[1] + (word32)idea->skey[skey_idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 216 x[2] = ((word32)x[2] + (word32)idea->skey[skey_idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 217 x[3] = idea_mult(x[3], idea->skey[skey_idx++]);
wolfSSL 13:f67a6c6013ca 218
wolfSSL 13:f67a6c6013ca 219 t2 = x[0] ^ x[2];
wolfSSL 13:f67a6c6013ca 220 t2 = idea_mult((word16)t2, idea->skey[skey_idx++]);
wolfSSL 13:f67a6c6013ca 221 t1 = (t2 + (x[1] ^ x[3])) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 222 t1 = idea_mult((word16)t1, idea->skey[skey_idx++]);
wolfSSL 13:f67a6c6013ca 223 t2 = (t1 + t2) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 224
wolfSSL 13:f67a6c6013ca 225 x[0] ^= t1;
wolfSSL 13:f67a6c6013ca 226 x[3] ^= t2;
wolfSSL 13:f67a6c6013ca 227
wolfSSL 13:f67a6c6013ca 228 t2 ^= x[1];
wolfSSL 13:f67a6c6013ca 229 x[1] = x[2] ^ (word16)t1;
wolfSSL 13:f67a6c6013ca 230 x[2] = (word16)t2;
wolfSSL 13:f67a6c6013ca 231 }
wolfSSL 13:f67a6c6013ca 232
wolfSSL 13:f67a6c6013ca 233 x[0] = idea_mult(x[0], idea->skey[skey_idx++]);
wolfSSL 13:f67a6c6013ca 234 out[0] = (x[0] >> 8) & 0xFF;
wolfSSL 13:f67a6c6013ca 235 out[1] = x[0] & 0xFF;
wolfSSL 13:f67a6c6013ca 236
wolfSSL 13:f67a6c6013ca 237 x[2] = ((word32)x[2] + (word32)idea->skey[skey_idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 238 out[2] = (x[2] >> 8) & 0xFF;
wolfSSL 13:f67a6c6013ca 239 out[3] = x[2] & 0xFF;
wolfSSL 13:f67a6c6013ca 240
wolfSSL 13:f67a6c6013ca 241 x[1] = ((word32)x[1] + (word32)idea->skey[skey_idx++]) & IDEA_MASK;
wolfSSL 13:f67a6c6013ca 242 out[4] = (x[1] >> 8) & 0xFF;
wolfSSL 13:f67a6c6013ca 243 out[5] = x[1] & 0xFF;
wolfSSL 13:f67a6c6013ca 244
wolfSSL 13:f67a6c6013ca 245 x[3] = idea_mult(x[3], idea->skey[skey_idx++]);
wolfSSL 13:f67a6c6013ca 246 out[6] = (x[3] >> 8) & 0xFF;
wolfSSL 13:f67a6c6013ca 247 out[7] = x[3] & 0xFF;
wolfSSL 13:f67a6c6013ca 248
wolfSSL 13:f67a6c6013ca 249 return 0;
wolfSSL 13:f67a6c6013ca 250 }
wolfSSL 13:f67a6c6013ca 251
wolfSSL 13:f67a6c6013ca 252 int wc_IdeaCbcEncrypt(Idea *idea, byte* out, const byte* in, word32 len)
wolfSSL 13:f67a6c6013ca 253 {
wolfSSL 13:f67a6c6013ca 254 int blocks;
wolfSSL 13:f67a6c6013ca 255 int ret;
wolfSSL 13:f67a6c6013ca 256
wolfSSL 13:f67a6c6013ca 257 if (idea == NULL || out == NULL || in == NULL)
wolfSSL 13:f67a6c6013ca 258 return BAD_FUNC_ARG;
wolfSSL 13:f67a6c6013ca 259
wolfSSL 13:f67a6c6013ca 260 blocks = len / IDEA_BLOCK_SIZE;
wolfSSL 13:f67a6c6013ca 261 while (blocks--) {
wolfSSL 13:f67a6c6013ca 262 xorbuf((byte*)idea->reg, in, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 263 ret = wc_IdeaCipher(idea, (byte*)idea->reg, (byte*)idea->reg);
wolfSSL 13:f67a6c6013ca 264 if (ret != 0) {
wolfSSL 13:f67a6c6013ca 265 return ret;
wolfSSL 13:f67a6c6013ca 266 }
wolfSSL 13:f67a6c6013ca 267
wolfSSL 13:f67a6c6013ca 268 XMEMCPY(out, idea->reg, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 269
wolfSSL 13:f67a6c6013ca 270 out += IDEA_BLOCK_SIZE;
wolfSSL 13:f67a6c6013ca 271 in += IDEA_BLOCK_SIZE;
wolfSSL 13:f67a6c6013ca 272 }
wolfSSL 13:f67a6c6013ca 273
wolfSSL 13:f67a6c6013ca 274 return 0;
wolfSSL 13:f67a6c6013ca 275 }
wolfSSL 13:f67a6c6013ca 276
wolfSSL 13:f67a6c6013ca 277 int wc_IdeaCbcDecrypt(Idea *idea, byte* out, const byte* in, word32 len)
wolfSSL 13:f67a6c6013ca 278 {
wolfSSL 13:f67a6c6013ca 279 int blocks;
wolfSSL 13:f67a6c6013ca 280 int ret;
wolfSSL 13:f67a6c6013ca 281
wolfSSL 13:f67a6c6013ca 282 if (idea == NULL || out == NULL || in == NULL)
wolfSSL 13:f67a6c6013ca 283 return BAD_FUNC_ARG;
wolfSSL 13:f67a6c6013ca 284
wolfSSL 13:f67a6c6013ca 285 blocks = len / IDEA_BLOCK_SIZE;
wolfSSL 13:f67a6c6013ca 286 while (blocks--) {
wolfSSL 13:f67a6c6013ca 287 XMEMCPY((byte*)idea->tmp, in, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 288 ret = wc_IdeaCipher(idea, out, (byte*)idea->tmp);
wolfSSL 13:f67a6c6013ca 289 if (ret != 0) {
wolfSSL 13:f67a6c6013ca 290 return ret;
wolfSSL 13:f67a6c6013ca 291 }
wolfSSL 13:f67a6c6013ca 292
wolfSSL 13:f67a6c6013ca 293 xorbuf(out, (byte*)idea->reg, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 294 XMEMCPY(idea->reg, idea->tmp, IDEA_BLOCK_SIZE);
wolfSSL 13:f67a6c6013ca 295
wolfSSL 13:f67a6c6013ca 296 out += IDEA_BLOCK_SIZE;
wolfSSL 13:f67a6c6013ca 297 in += IDEA_BLOCK_SIZE;
wolfSSL 13:f67a6c6013ca 298 }
wolfSSL 13:f67a6c6013ca 299
wolfSSL 13:f67a6c6013ca 300 return 0;
wolfSSL 13:f67a6c6013ca 301 }
wolfSSL 13:f67a6c6013ca 302
wolfSSL 13:f67a6c6013ca 303 #endif /* HAVE_IDEA */
wolfSSL 13:f67a6c6013ca 304