d 0773d / CyaSSL

Fork of CyaSSL for my specific settings

Dependents:   CyaSSL_Example

Fork of CyaSSL by wolf SSL

ctaocrypt/src/rabbit.c@4:28ac50e1d49c, 2015-03-03 (annotated)

Committer:
d0773d
Date:
Tue Mar 03 22:52:52 2015 +0000
Revision:
4:28ac50e1d49c
Parent:
0:1239e9b70ca2 
CyaSSL example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:1239e9b70ca2 1 /* rabbit.c
wolfSSL 0:1239e9b70ca2 2 *
wolfSSL 0:1239e9b70ca2 3 * Copyright (C) 2006-2014 wolfSSL Inc.
wolfSSL 0:1239e9b70ca2 4 *
wolfSSL 0:1239e9b70ca2 5 * This file is part of CyaSSL.
wolfSSL 0:1239e9b70ca2 6 *
wolfSSL 0:1239e9b70ca2 7 * CyaSSL is free software; you can redistribute it and/or modify
wolfSSL 0:1239e9b70ca2 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:1239e9b70ca2 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:1239e9b70ca2 10 * (at your option) any later version.
wolfSSL 0:1239e9b70ca2 11 *
wolfSSL 0:1239e9b70ca2 12 * CyaSSL is distributed in the hope that it will be useful,
wolfSSL 0:1239e9b70ca2 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:1239e9b70ca2 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:1239e9b70ca2 15 * GNU General Public License for more details.
wolfSSL 0:1239e9b70ca2 16 *
wolfSSL 0:1239e9b70ca2 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:1239e9b70ca2 18 * along with this program; if not, write to the Free Software
wolfSSL 0:1239e9b70ca2 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:1239e9b70ca2 20 */
wolfSSL 0:1239e9b70ca2 21
wolfSSL 0:1239e9b70ca2 22 #ifdef HAVE_CONFIG_H
wolfSSL 0:1239e9b70ca2 23 #include <config.h>
wolfSSL 0:1239e9b70ca2 24 #endif
wolfSSL 0:1239e9b70ca2 25
wolfSSL 0:1239e9b70ca2 26 #include <cyassl/ctaocrypt/settings.h>
wolfSSL 0:1239e9b70ca2 27
wolfSSL 0:1239e9b70ca2 28 #ifndef NO_RABBIT
wolfSSL 0:1239e9b70ca2 29
wolfSSL 0:1239e9b70ca2 30 #include <cyassl/ctaocrypt/rabbit.h>
wolfSSL 0:1239e9b70ca2 31 #include <cyassl/ctaocrypt/error-crypt.h>
wolfSSL 0:1239e9b70ca2 32 #include <cyassl/ctaocrypt/logging.h>
wolfSSL 0:1239e9b70ca2 33 #ifdef NO_INLINE
wolfSSL 0:1239e9b70ca2 34 #include <cyassl/ctaocrypt/misc.h>
wolfSSL 0:1239e9b70ca2 35 #else
wolfSSL 0:1239e9b70ca2 36 #include <ctaocrypt/src/misc.c>
wolfSSL 0:1239e9b70ca2 37 #endif
wolfSSL 0:1239e9b70ca2 38
wolfSSL 0:1239e9b70ca2 39
wolfSSL 0:1239e9b70ca2 40 #ifdef BIG_ENDIAN_ORDER
wolfSSL 0:1239e9b70ca2 41 #define LITTLE32(x) ByteReverseWord32(x)
wolfSSL 0:1239e9b70ca2 42 #else
wolfSSL 0:1239e9b70ca2 43 #define LITTLE32(x) (x)
wolfSSL 0:1239e9b70ca2 44 #endif
wolfSSL 0:1239e9b70ca2 45
wolfSSL 0:1239e9b70ca2 46 #define U32V(x) ((word32)(x) & 0xFFFFFFFFU)
wolfSSL 0:1239e9b70ca2 47
wolfSSL 0:1239e9b70ca2 48
wolfSSL 0:1239e9b70ca2 49 /* Square a 32-bit unsigned integer to obtain the 64-bit result and return */
wolfSSL 0:1239e9b70ca2 50 /* the upper 32 bits XOR the lower 32 bits */
wolfSSL 0:1239e9b70ca2 51 static word32 RABBIT_g_func(word32 x)
wolfSSL 0:1239e9b70ca2 52 {
wolfSSL 0:1239e9b70ca2 53 /* Temporary variables */
wolfSSL 0:1239e9b70ca2 54 word32 a, b, h, l;
wolfSSL 0:1239e9b70ca2 55
wolfSSL 0:1239e9b70ca2 56 /* Construct high and low argument for squaring */
wolfSSL 0:1239e9b70ca2 57 a = x&0xFFFF;
wolfSSL 0:1239e9b70ca2 58 b = x>>16;
wolfSSL 0:1239e9b70ca2 59
wolfSSL 0:1239e9b70ca2 60 /* Calculate high and low result of squaring */
wolfSSL 0:1239e9b70ca2 61 h = (((U32V(a*a)>>17) + U32V(a*b))>>15) + b*b;
wolfSSL 0:1239e9b70ca2 62 l = x*x;
wolfSSL 0:1239e9b70ca2 63
wolfSSL 0:1239e9b70ca2 64 /* Return high XOR low */
wolfSSL 0:1239e9b70ca2 65 return U32V(h^l);
wolfSSL 0:1239e9b70ca2 66 }
wolfSSL 0:1239e9b70ca2 67
wolfSSL 0:1239e9b70ca2 68
wolfSSL 0:1239e9b70ca2 69 /* Calculate the next internal state */
wolfSSL 0:1239e9b70ca2 70 static void RABBIT_next_state(RabbitCtx* ctx)
wolfSSL 0:1239e9b70ca2 71 {
wolfSSL 0:1239e9b70ca2 72 /* Temporary variables */
wolfSSL 0:1239e9b70ca2 73 word32 g[8], c_old[8], i;
wolfSSL 0:1239e9b70ca2 74
wolfSSL 0:1239e9b70ca2 75 /* Save old counter values */
wolfSSL 0:1239e9b70ca2 76 for (i=0; i<8; i++)
wolfSSL 0:1239e9b70ca2 77 c_old[i] = ctx->c[i];
wolfSSL 0:1239e9b70ca2 78
wolfSSL 0:1239e9b70ca2 79 /* Calculate new counter values */
wolfSSL 0:1239e9b70ca2 80 ctx->c[0] = U32V(ctx->c[0] + 0x4D34D34D + ctx->carry);
wolfSSL 0:1239e9b70ca2 81 ctx->c[1] = U32V(ctx->c[1] + 0xD34D34D3 + (ctx->c[0] < c_old[0]));
wolfSSL 0:1239e9b70ca2 82 ctx->c[2] = U32V(ctx->c[2] + 0x34D34D34 + (ctx->c[1] < c_old[1]));
wolfSSL 0:1239e9b70ca2 83 ctx->c[3] = U32V(ctx->c[3] + 0x4D34D34D + (ctx->c[2] < c_old[2]));
wolfSSL 0:1239e9b70ca2 84 ctx->c[4] = U32V(ctx->c[4] + 0xD34D34D3 + (ctx->c[3] < c_old[3]));
wolfSSL 0:1239e9b70ca2 85 ctx->c[5] = U32V(ctx->c[5] + 0x34D34D34 + (ctx->c[4] < c_old[4]));
wolfSSL 0:1239e9b70ca2 86 ctx->c[6] = U32V(ctx->c[6] + 0x4D34D34D + (ctx->c[5] < c_old[5]));
wolfSSL 0:1239e9b70ca2 87 ctx->c[7] = U32V(ctx->c[7] + 0xD34D34D3 + (ctx->c[6] < c_old[6]));
wolfSSL 0:1239e9b70ca2 88 ctx->carry = (ctx->c[7] < c_old[7]);
wolfSSL 0:1239e9b70ca2 89
wolfSSL 0:1239e9b70ca2 90 /* Calculate the g-values */
wolfSSL 0:1239e9b70ca2 91 for (i=0;i<8;i++)
wolfSSL 0:1239e9b70ca2 92 g[i] = RABBIT_g_func(U32V(ctx->x[i] + ctx->c[i]));
wolfSSL 0:1239e9b70ca2 93
wolfSSL 0:1239e9b70ca2 94 /* Calculate new state values */
wolfSSL 0:1239e9b70ca2 95 ctx->x[0] = U32V(g[0] + rotlFixed(g[7],16) + rotlFixed(g[6], 16));
wolfSSL 0:1239e9b70ca2 96 ctx->x[1] = U32V(g[1] + rotlFixed(g[0], 8) + g[7]);
wolfSSL 0:1239e9b70ca2 97 ctx->x[2] = U32V(g[2] + rotlFixed(g[1],16) + rotlFixed(g[0], 16));
wolfSSL 0:1239e9b70ca2 98 ctx->x[3] = U32V(g[3] + rotlFixed(g[2], 8) + g[1]);
wolfSSL 0:1239e9b70ca2 99 ctx->x[4] = U32V(g[4] + rotlFixed(g[3],16) + rotlFixed(g[2], 16));
wolfSSL 0:1239e9b70ca2 100 ctx->x[5] = U32V(g[5] + rotlFixed(g[4], 8) + g[3]);
wolfSSL 0:1239e9b70ca2 101 ctx->x[6] = U32V(g[6] + rotlFixed(g[5],16) + rotlFixed(g[4], 16));
wolfSSL 0:1239e9b70ca2 102 ctx->x[7] = U32V(g[7] + rotlFixed(g[6], 8) + g[5]);
wolfSSL 0:1239e9b70ca2 103 }
wolfSSL 0:1239e9b70ca2 104
wolfSSL 0:1239e9b70ca2 105
wolfSSL 0:1239e9b70ca2 106 /* IV setup */
wolfSSL 0:1239e9b70ca2 107 static void RabbitSetIV(Rabbit* ctx, const byte* inIv)
wolfSSL 0:1239e9b70ca2 108 {
wolfSSL 0:1239e9b70ca2 109 /* Temporary variables */
wolfSSL 0:1239e9b70ca2 110 word32 i0, i1, i2, i3, i;
wolfSSL 0:1239e9b70ca2 111 word32 iv[2];
wolfSSL 0:1239e9b70ca2 112
wolfSSL 0:1239e9b70ca2 113 if (inIv)
wolfSSL 0:1239e9b70ca2 114 XMEMCPY(iv, inIv, sizeof(iv));
wolfSSL 0:1239e9b70ca2 115 else
wolfSSL 0:1239e9b70ca2 116 XMEMSET(iv, 0, sizeof(iv));
wolfSSL 0:1239e9b70ca2 117
wolfSSL 0:1239e9b70ca2 118 /* Generate four subvectors */
wolfSSL 0:1239e9b70ca2 119 i0 = LITTLE32(iv[0]);
wolfSSL 0:1239e9b70ca2 120 i2 = LITTLE32(iv[1]);
wolfSSL 0:1239e9b70ca2 121 i1 = (i0>>16) | (i2&0xFFFF0000);
wolfSSL 0:1239e9b70ca2 122 i3 = (i2<<16) | (i0&0x0000FFFF);
wolfSSL 0:1239e9b70ca2 123
wolfSSL 0:1239e9b70ca2 124 /* Modify counter values */
wolfSSL 0:1239e9b70ca2 125 ctx->workCtx.c[0] = ctx->masterCtx.c[0] ^ i0;
wolfSSL 0:1239e9b70ca2 126 ctx->workCtx.c[1] = ctx->masterCtx.c[1] ^ i1;
wolfSSL 0:1239e9b70ca2 127 ctx->workCtx.c[2] = ctx->masterCtx.c[2] ^ i2;
wolfSSL 0:1239e9b70ca2 128 ctx->workCtx.c[3] = ctx->masterCtx.c[3] ^ i3;
wolfSSL 0:1239e9b70ca2 129 ctx->workCtx.c[4] = ctx->masterCtx.c[4] ^ i0;
wolfSSL 0:1239e9b70ca2 130 ctx->workCtx.c[5] = ctx->masterCtx.c[5] ^ i1;
wolfSSL 0:1239e9b70ca2 131 ctx->workCtx.c[6] = ctx->masterCtx.c[6] ^ i2;
wolfSSL 0:1239e9b70ca2 132 ctx->workCtx.c[7] = ctx->masterCtx.c[7] ^ i3;
wolfSSL 0:1239e9b70ca2 133
wolfSSL 0:1239e9b70ca2 134 /* Copy state variables */
wolfSSL 0:1239e9b70ca2 135 for (i=0; i<8; i++)
wolfSSL 0:1239e9b70ca2 136 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 0:1239e9b70ca2 137 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 0:1239e9b70ca2 138
wolfSSL 0:1239e9b70ca2 139 /* Iterate the system four times */
wolfSSL 0:1239e9b70ca2 140 for (i=0; i<4; i++)
wolfSSL 0:1239e9b70ca2 141 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 0:1239e9b70ca2 142 }
wolfSSL 0:1239e9b70ca2 143
wolfSSL 0:1239e9b70ca2 144
wolfSSL 0:1239e9b70ca2 145 /* Key setup */
wolfSSL 0:1239e9b70ca2 146 static INLINE int DoKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 0:1239e9b70ca2 147 {
wolfSSL 0:1239e9b70ca2 148 /* Temporary variables */
wolfSSL 0:1239e9b70ca2 149 word32 k0, k1, k2, k3, i;
wolfSSL 0:1239e9b70ca2 150
wolfSSL 0:1239e9b70ca2 151 /* Generate four subkeys */
wolfSSL 0:1239e9b70ca2 152 k0 = LITTLE32(*(word32*)(key+ 0));
wolfSSL 0:1239e9b70ca2 153 k1 = LITTLE32(*(word32*)(key+ 4));
wolfSSL 0:1239e9b70ca2 154 k2 = LITTLE32(*(word32*)(key+ 8));
wolfSSL 0:1239e9b70ca2 155 k3 = LITTLE32(*(word32*)(key+12));
wolfSSL 0:1239e9b70ca2 156
wolfSSL 0:1239e9b70ca2 157 /* Generate initial state variables */
wolfSSL 0:1239e9b70ca2 158 ctx->masterCtx.x[0] = k0;
wolfSSL 0:1239e9b70ca2 159 ctx->masterCtx.x[2] = k1;
wolfSSL 0:1239e9b70ca2 160 ctx->masterCtx.x[4] = k2;
wolfSSL 0:1239e9b70ca2 161 ctx->masterCtx.x[6] = k3;
wolfSSL 0:1239e9b70ca2 162 ctx->masterCtx.x[1] = U32V(k3<<16) | (k2>>16);
wolfSSL 0:1239e9b70ca2 163 ctx->masterCtx.x[3] = U32V(k0<<16) | (k3>>16);
wolfSSL 0:1239e9b70ca2 164 ctx->masterCtx.x[5] = U32V(k1<<16) | (k0>>16);
wolfSSL 0:1239e9b70ca2 165 ctx->masterCtx.x[7] = U32V(k2<<16) | (k1>>16);
wolfSSL 0:1239e9b70ca2 166
wolfSSL 0:1239e9b70ca2 167 /* Generate initial counter values */
wolfSSL 0:1239e9b70ca2 168 ctx->masterCtx.c[0] = rotlFixed(k2, 16);
wolfSSL 0:1239e9b70ca2 169 ctx->masterCtx.c[2] = rotlFixed(k3, 16);
wolfSSL 0:1239e9b70ca2 170 ctx->masterCtx.c[4] = rotlFixed(k0, 16);
wolfSSL 0:1239e9b70ca2 171 ctx->masterCtx.c[6] = rotlFixed(k1, 16);
wolfSSL 0:1239e9b70ca2 172 ctx->masterCtx.c[1] = (k0&0xFFFF0000) | (k1&0xFFFF);
wolfSSL 0:1239e9b70ca2 173 ctx->masterCtx.c[3] = (k1&0xFFFF0000) | (k2&0xFFFF);
wolfSSL 0:1239e9b70ca2 174 ctx->masterCtx.c[5] = (k2&0xFFFF0000) | (k3&0xFFFF);
wolfSSL 0:1239e9b70ca2 175 ctx->masterCtx.c[7] = (k3&0xFFFF0000) | (k0&0xFFFF);
wolfSSL 0:1239e9b70ca2 176
wolfSSL 0:1239e9b70ca2 177 /* Clear carry bit */
wolfSSL 0:1239e9b70ca2 178 ctx->masterCtx.carry = 0;
wolfSSL 0:1239e9b70ca2 179
wolfSSL 0:1239e9b70ca2 180 /* Iterate the system four times */
wolfSSL 0:1239e9b70ca2 181 for (i=0; i<4; i++)
wolfSSL 0:1239e9b70ca2 182 RABBIT_next_state(&(ctx->masterCtx));
wolfSSL 0:1239e9b70ca2 183
wolfSSL 0:1239e9b70ca2 184 /* Modify the counters */
wolfSSL 0:1239e9b70ca2 185 for (i=0; i<8; i++)
wolfSSL 0:1239e9b70ca2 186 ctx->masterCtx.c[i] ^= ctx->masterCtx.x[(i+4)&0x7];
wolfSSL 0:1239e9b70ca2 187
wolfSSL 0:1239e9b70ca2 188 /* Copy master instance to work instance */
wolfSSL 0:1239e9b70ca2 189 for (i=0; i<8; i++) {
wolfSSL 0:1239e9b70ca2 190 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 0:1239e9b70ca2 191 ctx->workCtx.c[i] = ctx->masterCtx.c[i];
wolfSSL 0:1239e9b70ca2 192 }
wolfSSL 0:1239e9b70ca2 193 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 0:1239e9b70ca2 194
wolfSSL 0:1239e9b70ca2 195 RabbitSetIV(ctx, iv);
wolfSSL 0:1239e9b70ca2 196
wolfSSL 0:1239e9b70ca2 197 return 0;
wolfSSL 0:1239e9b70ca2 198 }
wolfSSL 0:1239e9b70ca2 199
wolfSSL 0:1239e9b70ca2 200
wolfSSL 0:1239e9b70ca2 201 /* Key setup */
wolfSSL 0:1239e9b70ca2 202 int RabbitSetKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 0:1239e9b70ca2 203 {
wolfSSL 0:1239e9b70ca2 204 #ifdef XSTREAM_ALIGN
wolfSSL 0:1239e9b70ca2 205 if ((word)key % 4) {
wolfSSL 0:1239e9b70ca2 206 int alignKey[4];
wolfSSL 0:1239e9b70ca2 207
wolfSSL 0:1239e9b70ca2 208 /* iv aligned in SetIV */
wolfSSL 0:1239e9b70ca2 209 CYASSL_MSG("RabbitSetKey unaligned key");
wolfSSL 0:1239e9b70ca2 210
wolfSSL 0:1239e9b70ca2 211 XMEMCPY(alignKey, key, sizeof(alignKey));
wolfSSL 0:1239e9b70ca2 212
wolfSSL 0:1239e9b70ca2 213 return DoKey(ctx, (const byte*)alignKey, iv);
wolfSSL 0:1239e9b70ca2 214 }
wolfSSL 0:1239e9b70ca2 215 #endif /* XSTREAM_ALIGN */
wolfSSL 0:1239e9b70ca2 216
wolfSSL 0:1239e9b70ca2 217 return DoKey(ctx, key, iv);
wolfSSL 0:1239e9b70ca2 218 }
wolfSSL 0:1239e9b70ca2 219
wolfSSL 0:1239e9b70ca2 220
wolfSSL 0:1239e9b70ca2 221 /* Encrypt/decrypt a message of any size */
wolfSSL 0:1239e9b70ca2 222 static INLINE int DoProcess(Rabbit* ctx, byte* output, const byte* input,
wolfSSL 0:1239e9b70ca2 223 word32 msglen)
wolfSSL 0:1239e9b70ca2 224 {
wolfSSL 0:1239e9b70ca2 225 /* Encrypt/decrypt all full blocks */
wolfSSL 0:1239e9b70ca2 226 while (msglen >= 16) {
wolfSSL 0:1239e9b70ca2 227 /* Iterate the system */
wolfSSL 0:1239e9b70ca2 228 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 0:1239e9b70ca2 229
wolfSSL 0:1239e9b70ca2 230 /* Encrypt/decrypt 16 bytes of data */
wolfSSL 0:1239e9b70ca2 231 *(word32*)(output+ 0) = *(word32*)(input+ 0) ^
wolfSSL 0:1239e9b70ca2 232 LITTLE32(ctx->workCtx.x[0] ^ (ctx->workCtx.x[5]>>16) ^
wolfSSL 0:1239e9b70ca2 233 U32V(ctx->workCtx.x[3]<<16));
wolfSSL 0:1239e9b70ca2 234 *(word32*)(output+ 4) = *(word32*)(input+ 4) ^
wolfSSL 0:1239e9b70ca2 235 LITTLE32(ctx->workCtx.x[2] ^ (ctx->workCtx.x[7]>>16) ^
wolfSSL 0:1239e9b70ca2 236 U32V(ctx->workCtx.x[5]<<16));
wolfSSL 0:1239e9b70ca2 237 *(word32*)(output+ 8) = *(word32*)(input+ 8) ^
wolfSSL 0:1239e9b70ca2 238 LITTLE32(ctx->workCtx.x[4] ^ (ctx->workCtx.x[1]>>16) ^
wolfSSL 0:1239e9b70ca2 239 U32V(ctx->workCtx.x[7]<<16));
wolfSSL 0:1239e9b70ca2 240 *(word32*)(output+12) = *(word32*)(input+12) ^
wolfSSL 0:1239e9b70ca2 241 LITTLE32(ctx->workCtx.x[6] ^ (ctx->workCtx.x[3]>>16) ^
wolfSSL 0:1239e9b70ca2 242 U32V(ctx->workCtx.x[1]<<16));
wolfSSL 0:1239e9b70ca2 243
wolfSSL 0:1239e9b70ca2 244 /* Increment pointers and decrement length */
wolfSSL 0:1239e9b70ca2 245 input += 16;
wolfSSL 0:1239e9b70ca2 246 output += 16;
wolfSSL 0:1239e9b70ca2 247 msglen -= 16;
wolfSSL 0:1239e9b70ca2 248 }
wolfSSL 0:1239e9b70ca2 249
wolfSSL 0:1239e9b70ca2 250 /* Encrypt/decrypt remaining data */
wolfSSL 0:1239e9b70ca2 251 if (msglen) {
wolfSSL 0:1239e9b70ca2 252
wolfSSL 0:1239e9b70ca2 253 word32 i;
wolfSSL 0:1239e9b70ca2 254 word32 tmp[4];
wolfSSL 0:1239e9b70ca2 255 byte* buffer = (byte*)tmp;
wolfSSL 0:1239e9b70ca2 256
wolfSSL 0:1239e9b70ca2 257 XMEMSET(tmp, 0, sizeof(tmp)); /* help static analysis */
wolfSSL 0:1239e9b70ca2 258
wolfSSL 0:1239e9b70ca2 259 /* Iterate the system */
wolfSSL 0:1239e9b70ca2 260 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 0:1239e9b70ca2 261
wolfSSL 0:1239e9b70ca2 262 /* Generate 16 bytes of pseudo-random data */
wolfSSL 0:1239e9b70ca2 263 tmp[0] = LITTLE32(ctx->workCtx.x[0] ^
wolfSSL 0:1239e9b70ca2 264 (ctx->workCtx.x[5]>>16) ^ U32V(ctx->workCtx.x[3]<<16));
wolfSSL 0:1239e9b70ca2 265 tmp[1] = LITTLE32(ctx->workCtx.x[2] ^
wolfSSL 0:1239e9b70ca2 266 (ctx->workCtx.x[7]>>16) ^ U32V(ctx->workCtx.x[5]<<16));
wolfSSL 0:1239e9b70ca2 267 tmp[2] = LITTLE32(ctx->workCtx.x[4] ^
wolfSSL 0:1239e9b70ca2 268 (ctx->workCtx.x[1]>>16) ^ U32V(ctx->workCtx.x[7]<<16));
wolfSSL 0:1239e9b70ca2 269 tmp[3] = LITTLE32(ctx->workCtx.x[6] ^
wolfSSL 0:1239e9b70ca2 270 (ctx->workCtx.x[3]>>16) ^ U32V(ctx->workCtx.x[1]<<16));
wolfSSL 0:1239e9b70ca2 271
wolfSSL 0:1239e9b70ca2 272 /* Encrypt/decrypt the data */
wolfSSL 0:1239e9b70ca2 273 for (i=0; i<msglen; i++)
wolfSSL 0:1239e9b70ca2 274 output[i] = input[i] ^ buffer[i];
wolfSSL 0:1239e9b70ca2 275 }
wolfSSL 0:1239e9b70ca2 276
wolfSSL 0:1239e9b70ca2 277 return 0;
wolfSSL 0:1239e9b70ca2 278 }
wolfSSL 0:1239e9b70ca2 279
wolfSSL 0:1239e9b70ca2 280
wolfSSL 0:1239e9b70ca2 281 /* Encrypt/decrypt a message of any size */
wolfSSL 0:1239e9b70ca2 282 int RabbitProcess(Rabbit* ctx, byte* output, const byte* input, word32 msglen)
wolfSSL 0:1239e9b70ca2 283 {
wolfSSL 0:1239e9b70ca2 284 #ifdef XSTREAM_ALIGN
wolfSSL 0:1239e9b70ca2 285 if ((word)input % 4 || (word)output % 4) {
wolfSSL 0:1239e9b70ca2 286 #ifndef NO_CYASSL_ALLOC_ALIGN
wolfSSL 0:1239e9b70ca2 287 byte* tmp;
wolfSSL 0:1239e9b70ca2 288 CYASSL_MSG("RabbitProcess unaligned");
wolfSSL 0:1239e9b70ca2 289
wolfSSL 0:1239e9b70ca2 290 tmp = (byte*)XMALLOC(msglen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 0:1239e9b70ca2 291 if (tmp == NULL) return MEMORY_E;
wolfSSL 0:1239e9b70ca2 292
wolfSSL 0:1239e9b70ca2 293 XMEMCPY(tmp, input, msglen);
wolfSSL 0:1239e9b70ca2 294 DoProcess(ctx, tmp, tmp, msglen);
wolfSSL 0:1239e9b70ca2 295 XMEMCPY(output, tmp, msglen);
wolfSSL 0:1239e9b70ca2 296
wolfSSL 0:1239e9b70ca2 297 XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 0:1239e9b70ca2 298
wolfSSL 0:1239e9b70ca2 299 return 0;
wolfSSL 0:1239e9b70ca2 300 #else
wolfSSL 0:1239e9b70ca2 301 return BAD_ALIGN_E;
wolfSSL 0:1239e9b70ca2 302 #endif
wolfSSL 0:1239e9b70ca2 303 }
wolfSSL 0:1239e9b70ca2 304 #endif /* XSTREAM_ALIGN */
wolfSSL 0:1239e9b70ca2 305
wolfSSL 0:1239e9b70ca2 306 return DoProcess(ctx, output, input, msglen);
wolfSSL 0:1239e9b70ca2 307 }
wolfSSL 0:1239e9b70ca2 308
wolfSSL 0:1239e9b70ca2 309
wolfSSL 0:1239e9b70ca2 310 #endif /* NO_RABBIT */
wolfSSL 0:1239e9b70ca2 311