wolf SSL / wolfSSL-TLS13-Beta

wolfSSL 3.11.1 for TLS1.3 beta

Fork of wolfSSL by wolf SSL

wolfcrypt/src/rabbit.c@13:80fb167dafdf, 2017-05-30 (annotated)

Committer:
wolfSSL
Date:
Tue May 30 06:16:19 2017 +0000
Revision:
13:80fb167dafdf
Parent:
11:cee25a834751 
wolfSSL 3.11.1: TLS1.3 Beta

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 11:cee25a834751 1 /* rabbit.c
wolfSSL 11:cee25a834751 2 *
wolfSSL 11:cee25a834751 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 11:cee25a834751 4 *
wolfSSL 11:cee25a834751 5 * This file is part of wolfSSL.
wolfSSL 11:cee25a834751 6 *
wolfSSL 11:cee25a834751 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 11:cee25a834751 8 * it under the terms of the GNU General Public License as published by
wolfSSL 11:cee25a834751 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 11:cee25a834751 10 * (at your option) any later version.
wolfSSL 11:cee25a834751 11 *
wolfSSL 11:cee25a834751 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 11:cee25a834751 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 11:cee25a834751 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 11:cee25a834751 15 * GNU General Public License for more details.
wolfSSL 11:cee25a834751 16 *
wolfSSL 11:cee25a834751 17 * You should have received a copy of the GNU General Public License
wolfSSL 11:cee25a834751 18 * along with this program; if not, write to the Free Software
wolfSSL 11:cee25a834751 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 11:cee25a834751 20 */
wolfSSL 11:cee25a834751 21
wolfSSL 11:cee25a834751 22
wolfSSL 11:cee25a834751 23 #ifdef HAVE_CONFIG_H
wolfSSL 11:cee25a834751 24 #include <config.h>
wolfSSL 11:cee25a834751 25 #endif
wolfSSL 11:cee25a834751 26
wolfSSL 11:cee25a834751 27 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 11:cee25a834751 28
wolfSSL 11:cee25a834751 29 #ifndef NO_RABBIT
wolfSSL 11:cee25a834751 30
wolfSSL 11:cee25a834751 31 #include <wolfssl/wolfcrypt/rabbit.h>
wolfSSL 11:cee25a834751 32 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 11:cee25a834751 33 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 11:cee25a834751 34 #ifdef NO_INLINE
wolfSSL 11:cee25a834751 35 #include <wolfssl/wolfcrypt/misc.h>
wolfSSL 11:cee25a834751 36 #else
wolfSSL 11:cee25a834751 37 #define WOLFSSL_MISC_INCLUDED
wolfSSL 11:cee25a834751 38 #include <wolfcrypt/src/misc.c>
wolfSSL 11:cee25a834751 39 #endif
wolfSSL 11:cee25a834751 40
wolfSSL 11:cee25a834751 41
wolfSSL 11:cee25a834751 42 #ifdef BIG_ENDIAN_ORDER
wolfSSL 11:cee25a834751 43 #define LITTLE32(x) ByteReverseWord32(x)
wolfSSL 11:cee25a834751 44 #else
wolfSSL 11:cee25a834751 45 #define LITTLE32(x) (x)
wolfSSL 11:cee25a834751 46 #endif
wolfSSL 11:cee25a834751 47
wolfSSL 11:cee25a834751 48 #define U32V(x) ((word32)(x) & 0xFFFFFFFFU)
wolfSSL 11:cee25a834751 49
wolfSSL 11:cee25a834751 50
wolfSSL 11:cee25a834751 51 /* Square a 32-bit unsigned integer to obtain the 64-bit result and return */
wolfSSL 11:cee25a834751 52 /* the upper 32 bits XOR the lower 32 bits */
wolfSSL 11:cee25a834751 53 static word32 RABBIT_g_func(word32 x)
wolfSSL 11:cee25a834751 54 {
wolfSSL 11:cee25a834751 55 /* Temporary variables */
wolfSSL 11:cee25a834751 56 word32 a, b, h, l;
wolfSSL 11:cee25a834751 57
wolfSSL 11:cee25a834751 58 /* Construct high and low argument for squaring */
wolfSSL 11:cee25a834751 59 a = x&0xFFFF;
wolfSSL 11:cee25a834751 60 b = x>>16;
wolfSSL 11:cee25a834751 61
wolfSSL 11:cee25a834751 62 /* Calculate high and low result of squaring */
wolfSSL 11:cee25a834751 63 h = (((U32V(a*a)>>17) + U32V(a*b))>>15) + b*b;
wolfSSL 11:cee25a834751 64 l = x*x;
wolfSSL 11:cee25a834751 65
wolfSSL 11:cee25a834751 66 /* Return high XOR low */
wolfSSL 11:cee25a834751 67 return U32V(h^l);
wolfSSL 11:cee25a834751 68 }
wolfSSL 11:cee25a834751 69
wolfSSL 11:cee25a834751 70
wolfSSL 11:cee25a834751 71 /* Calculate the next internal state */
wolfSSL 11:cee25a834751 72 static void RABBIT_next_state(RabbitCtx* ctx)
wolfSSL 11:cee25a834751 73 {
wolfSSL 11:cee25a834751 74 /* Temporary variables */
wolfSSL 11:cee25a834751 75 word32 g[8], c_old[8], i;
wolfSSL 11:cee25a834751 76
wolfSSL 11:cee25a834751 77 /* Save old counter values */
wolfSSL 11:cee25a834751 78 for (i=0; i<8; i++)
wolfSSL 11:cee25a834751 79 c_old[i] = ctx->c[i];
wolfSSL 11:cee25a834751 80
wolfSSL 11:cee25a834751 81 /* Calculate new counter values */
wolfSSL 11:cee25a834751 82 ctx->c[0] = U32V(ctx->c[0] + 0x4D34D34D + ctx->carry);
wolfSSL 11:cee25a834751 83 ctx->c[1] = U32V(ctx->c[1] + 0xD34D34D3 + (ctx->c[0] < c_old[0]));
wolfSSL 11:cee25a834751 84 ctx->c[2] = U32V(ctx->c[2] + 0x34D34D34 + (ctx->c[1] < c_old[1]));
wolfSSL 11:cee25a834751 85 ctx->c[3] = U32V(ctx->c[3] + 0x4D34D34D + (ctx->c[2] < c_old[2]));
wolfSSL 11:cee25a834751 86 ctx->c[4] = U32V(ctx->c[4] + 0xD34D34D3 + (ctx->c[3] < c_old[3]));
wolfSSL 11:cee25a834751 87 ctx->c[5] = U32V(ctx->c[5] + 0x34D34D34 + (ctx->c[4] < c_old[4]));
wolfSSL 11:cee25a834751 88 ctx->c[6] = U32V(ctx->c[6] + 0x4D34D34D + (ctx->c[5] < c_old[5]));
wolfSSL 11:cee25a834751 89 ctx->c[7] = U32V(ctx->c[7] + 0xD34D34D3 + (ctx->c[6] < c_old[6]));
wolfSSL 11:cee25a834751 90 ctx->carry = (ctx->c[7] < c_old[7]);
wolfSSL 11:cee25a834751 91
wolfSSL 11:cee25a834751 92 /* Calculate the g-values */
wolfSSL 11:cee25a834751 93 for (i=0;i<8;i++)
wolfSSL 11:cee25a834751 94 g[i] = RABBIT_g_func(U32V(ctx->x[i] + ctx->c[i]));
wolfSSL 11:cee25a834751 95
wolfSSL 11:cee25a834751 96 /* Calculate new state values */
wolfSSL 11:cee25a834751 97 ctx->x[0] = U32V(g[0] + rotlFixed(g[7],16) + rotlFixed(g[6], 16));
wolfSSL 11:cee25a834751 98 ctx->x[1] = U32V(g[1] + rotlFixed(g[0], 8) + g[7]);
wolfSSL 11:cee25a834751 99 ctx->x[2] = U32V(g[2] + rotlFixed(g[1],16) + rotlFixed(g[0], 16));
wolfSSL 11:cee25a834751 100 ctx->x[3] = U32V(g[3] + rotlFixed(g[2], 8) + g[1]);
wolfSSL 11:cee25a834751 101 ctx->x[4] = U32V(g[4] + rotlFixed(g[3],16) + rotlFixed(g[2], 16));
wolfSSL 11:cee25a834751 102 ctx->x[5] = U32V(g[5] + rotlFixed(g[4], 8) + g[3]);
wolfSSL 11:cee25a834751 103 ctx->x[6] = U32V(g[6] + rotlFixed(g[5],16) + rotlFixed(g[4], 16));
wolfSSL 11:cee25a834751 104 ctx->x[7] = U32V(g[7] + rotlFixed(g[6], 8) + g[5]);
wolfSSL 11:cee25a834751 105 }
wolfSSL 11:cee25a834751 106
wolfSSL 11:cee25a834751 107
wolfSSL 11:cee25a834751 108 /* IV setup */
wolfSSL 11:cee25a834751 109 static void wc_RabbitSetIV(Rabbit* ctx, const byte* inIv)
wolfSSL 11:cee25a834751 110 {
wolfSSL 11:cee25a834751 111 /* Temporary variables */
wolfSSL 11:cee25a834751 112 word32 i0, i1, i2, i3, i;
wolfSSL 11:cee25a834751 113 word32 iv[2];
wolfSSL 11:cee25a834751 114
wolfSSL 11:cee25a834751 115 if (inIv)
wolfSSL 11:cee25a834751 116 XMEMCPY(iv, inIv, sizeof(iv));
wolfSSL 11:cee25a834751 117 else
wolfSSL 11:cee25a834751 118 XMEMSET(iv, 0, sizeof(iv));
wolfSSL 11:cee25a834751 119
wolfSSL 11:cee25a834751 120 /* Generate four subvectors */
wolfSSL 11:cee25a834751 121 i0 = LITTLE32(iv[0]);
wolfSSL 11:cee25a834751 122 i2 = LITTLE32(iv[1]);
wolfSSL 11:cee25a834751 123 i1 = (i0>>16) | (i2&0xFFFF0000);
wolfSSL 11:cee25a834751 124 i3 = (i2<<16) | (i0&0x0000FFFF);
wolfSSL 11:cee25a834751 125
wolfSSL 11:cee25a834751 126 /* Modify counter values */
wolfSSL 11:cee25a834751 127 ctx->workCtx.c[0] = ctx->masterCtx.c[0] ^ i0;
wolfSSL 11:cee25a834751 128 ctx->workCtx.c[1] = ctx->masterCtx.c[1] ^ i1;
wolfSSL 11:cee25a834751 129 ctx->workCtx.c[2] = ctx->masterCtx.c[2] ^ i2;
wolfSSL 11:cee25a834751 130 ctx->workCtx.c[3] = ctx->masterCtx.c[3] ^ i3;
wolfSSL 11:cee25a834751 131 ctx->workCtx.c[4] = ctx->masterCtx.c[4] ^ i0;
wolfSSL 11:cee25a834751 132 ctx->workCtx.c[5] = ctx->masterCtx.c[5] ^ i1;
wolfSSL 11:cee25a834751 133 ctx->workCtx.c[6] = ctx->masterCtx.c[6] ^ i2;
wolfSSL 11:cee25a834751 134 ctx->workCtx.c[7] = ctx->masterCtx.c[7] ^ i3;
wolfSSL 11:cee25a834751 135
wolfSSL 11:cee25a834751 136 /* Copy state variables */
wolfSSL 11:cee25a834751 137 for (i=0; i<8; i++)
wolfSSL 11:cee25a834751 138 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 11:cee25a834751 139 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 11:cee25a834751 140
wolfSSL 11:cee25a834751 141 /* Iterate the system four times */
wolfSSL 11:cee25a834751 142 for (i=0; i<4; i++)
wolfSSL 11:cee25a834751 143 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 11:cee25a834751 144 }
wolfSSL 11:cee25a834751 145
wolfSSL 11:cee25a834751 146
wolfSSL 11:cee25a834751 147 /* Key setup */
wolfSSL 11:cee25a834751 148 static INLINE int DoKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 11:cee25a834751 149 {
wolfSSL 11:cee25a834751 150 /* Temporary variables */
wolfSSL 11:cee25a834751 151 word32 k0, k1, k2, k3, i;
wolfSSL 11:cee25a834751 152
wolfSSL 11:cee25a834751 153 /* Generate four subkeys */
wolfSSL 11:cee25a834751 154 k0 = LITTLE32(*(word32*)(key+ 0));
wolfSSL 11:cee25a834751 155 k1 = LITTLE32(*(word32*)(key+ 4));
wolfSSL 11:cee25a834751 156 k2 = LITTLE32(*(word32*)(key+ 8));
wolfSSL 11:cee25a834751 157 k3 = LITTLE32(*(word32*)(key+12));
wolfSSL 11:cee25a834751 158
wolfSSL 11:cee25a834751 159 /* Generate initial state variables */
wolfSSL 11:cee25a834751 160 ctx->masterCtx.x[0] = k0;
wolfSSL 11:cee25a834751 161 ctx->masterCtx.x[2] = k1;
wolfSSL 11:cee25a834751 162 ctx->masterCtx.x[4] = k2;
wolfSSL 11:cee25a834751 163 ctx->masterCtx.x[6] = k3;
wolfSSL 11:cee25a834751 164 ctx->masterCtx.x[1] = U32V(k3<<16) | (k2>>16);
wolfSSL 11:cee25a834751 165 ctx->masterCtx.x[3] = U32V(k0<<16) | (k3>>16);
wolfSSL 11:cee25a834751 166 ctx->masterCtx.x[5] = U32V(k1<<16) | (k0>>16);
wolfSSL 11:cee25a834751 167 ctx->masterCtx.x[7] = U32V(k2<<16) | (k1>>16);
wolfSSL 11:cee25a834751 168
wolfSSL 11:cee25a834751 169 /* Generate initial counter values */
wolfSSL 11:cee25a834751 170 ctx->masterCtx.c[0] = rotlFixed(k2, 16);
wolfSSL 11:cee25a834751 171 ctx->masterCtx.c[2] = rotlFixed(k3, 16);
wolfSSL 11:cee25a834751 172 ctx->masterCtx.c[4] = rotlFixed(k0, 16);
wolfSSL 11:cee25a834751 173 ctx->masterCtx.c[6] = rotlFixed(k1, 16);
wolfSSL 11:cee25a834751 174 ctx->masterCtx.c[1] = (k0&0xFFFF0000) | (k1&0xFFFF);
wolfSSL 11:cee25a834751 175 ctx->masterCtx.c[3] = (k1&0xFFFF0000) | (k2&0xFFFF);
wolfSSL 11:cee25a834751 176 ctx->masterCtx.c[5] = (k2&0xFFFF0000) | (k3&0xFFFF);
wolfSSL 11:cee25a834751 177 ctx->masterCtx.c[7] = (k3&0xFFFF0000) | (k0&0xFFFF);
wolfSSL 11:cee25a834751 178
wolfSSL 11:cee25a834751 179 /* Clear carry bit */
wolfSSL 11:cee25a834751 180 ctx->masterCtx.carry = 0;
wolfSSL 11:cee25a834751 181
wolfSSL 11:cee25a834751 182 /* Iterate the system four times */
wolfSSL 11:cee25a834751 183 for (i=0; i<4; i++)
wolfSSL 11:cee25a834751 184 RABBIT_next_state(&(ctx->masterCtx));
wolfSSL 11:cee25a834751 185
wolfSSL 11:cee25a834751 186 /* Modify the counters */
wolfSSL 11:cee25a834751 187 for (i=0; i<8; i++)
wolfSSL 11:cee25a834751 188 ctx->masterCtx.c[i] ^= ctx->masterCtx.x[(i+4)&0x7];
wolfSSL 11:cee25a834751 189
wolfSSL 11:cee25a834751 190 /* Copy master instance to work instance */
wolfSSL 11:cee25a834751 191 for (i=0; i<8; i++) {
wolfSSL 11:cee25a834751 192 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 11:cee25a834751 193 ctx->workCtx.c[i] = ctx->masterCtx.c[i];
wolfSSL 11:cee25a834751 194 }
wolfSSL 11:cee25a834751 195 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 11:cee25a834751 196
wolfSSL 11:cee25a834751 197 wc_RabbitSetIV(ctx, iv);
wolfSSL 11:cee25a834751 198
wolfSSL 11:cee25a834751 199 return 0;
wolfSSL 11:cee25a834751 200 }
wolfSSL 11:cee25a834751 201
wolfSSL 11:cee25a834751 202
wolfSSL 11:cee25a834751 203 int wc_Rabbit_SetHeap(Rabbit* ctx, void* heap)
wolfSSL 11:cee25a834751 204 {
wolfSSL 11:cee25a834751 205 if (ctx == NULL) {
wolfSSL 11:cee25a834751 206 return BAD_FUNC_ARG;
wolfSSL 11:cee25a834751 207 }
wolfSSL 11:cee25a834751 208
wolfSSL 11:cee25a834751 209 #ifdef XSTREAM_ALIGN
wolfSSL 11:cee25a834751 210 ctx->heap = heap;
wolfSSL 11:cee25a834751 211 #endif
wolfSSL 11:cee25a834751 212
wolfSSL 11:cee25a834751 213 (void)heap;
wolfSSL 11:cee25a834751 214 return 0;
wolfSSL 11:cee25a834751 215 }
wolfSSL 11:cee25a834751 216
wolfSSL 11:cee25a834751 217
wolfSSL 11:cee25a834751 218 /* Key setup */
wolfSSL 11:cee25a834751 219 int wc_RabbitSetKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 11:cee25a834751 220 {
wolfSSL 11:cee25a834751 221 #ifdef XSTREAM_ALIGN
wolfSSL 11:cee25a834751 222 /* default heap to NULL or heap test value */
wolfSSL 11:cee25a834751 223 #ifdef WOLFSSL_HEAP_TEST
wolfSSL 11:cee25a834751 224 ctx->heap = (void*)WOLFSSL_HEAP_TEST;
wolfSSL 11:cee25a834751 225 #else
wolfSSL 11:cee25a834751 226 ctx->heap = NULL;
wolfSSL 11:cee25a834751 227 #endif /* WOLFSSL_HEAP_TEST */
wolfSSL 11:cee25a834751 228
wolfSSL 11:cee25a834751 229 if ((wolfssl_word)key % 4) {
wolfSSL 11:cee25a834751 230 int alignKey[4];
wolfSSL 11:cee25a834751 231
wolfSSL 11:cee25a834751 232 /* iv aligned in SetIV */
wolfSSL 11:cee25a834751 233 WOLFSSL_MSG("wc_RabbitSetKey unaligned key");
wolfSSL 11:cee25a834751 234
wolfSSL 11:cee25a834751 235 XMEMCPY(alignKey, key, sizeof(alignKey));
wolfSSL 11:cee25a834751 236
wolfSSL 11:cee25a834751 237 return DoKey(ctx, (const byte*)alignKey, iv);
wolfSSL 11:cee25a834751 238 }
wolfSSL 11:cee25a834751 239 #endif /* XSTREAM_ALIGN */
wolfSSL 11:cee25a834751 240
wolfSSL 11:cee25a834751 241 return DoKey(ctx, key, iv);
wolfSSL 11:cee25a834751 242 }
wolfSSL 11:cee25a834751 243
wolfSSL 11:cee25a834751 244
wolfSSL 11:cee25a834751 245 /* Encrypt/decrypt a message of any size */
wolfSSL 11:cee25a834751 246 static INLINE int DoProcess(Rabbit* ctx, byte* output, const byte* input,
wolfSSL 11:cee25a834751 247 word32 msglen)
wolfSSL 11:cee25a834751 248 {
wolfSSL 11:cee25a834751 249 /* Encrypt/decrypt all full blocks */
wolfSSL 11:cee25a834751 250 while (msglen >= 16) {
wolfSSL 11:cee25a834751 251 /* Iterate the system */
wolfSSL 11:cee25a834751 252 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 11:cee25a834751 253
wolfSSL 11:cee25a834751 254 /* Encrypt/decrypt 16 bytes of data */
wolfSSL 11:cee25a834751 255 *(word32*)(output+ 0) = *(word32*)(input+ 0) ^
wolfSSL 11:cee25a834751 256 LITTLE32(ctx->workCtx.x[0] ^ (ctx->workCtx.x[5]>>16) ^
wolfSSL 11:cee25a834751 257 U32V(ctx->workCtx.x[3]<<16));
wolfSSL 11:cee25a834751 258 *(word32*)(output+ 4) = *(word32*)(input+ 4) ^
wolfSSL 11:cee25a834751 259 LITTLE32(ctx->workCtx.x[2] ^ (ctx->workCtx.x[7]>>16) ^
wolfSSL 11:cee25a834751 260 U32V(ctx->workCtx.x[5]<<16));
wolfSSL 11:cee25a834751 261 *(word32*)(output+ 8) = *(word32*)(input+ 8) ^
wolfSSL 11:cee25a834751 262 LITTLE32(ctx->workCtx.x[4] ^ (ctx->workCtx.x[1]>>16) ^
wolfSSL 11:cee25a834751 263 U32V(ctx->workCtx.x[7]<<16));
wolfSSL 11:cee25a834751 264 *(word32*)(output+12) = *(word32*)(input+12) ^
wolfSSL 11:cee25a834751 265 LITTLE32(ctx->workCtx.x[6] ^ (ctx->workCtx.x[3]>>16) ^
wolfSSL 11:cee25a834751 266 U32V(ctx->workCtx.x[1]<<16));
wolfSSL 11:cee25a834751 267
wolfSSL 11:cee25a834751 268 /* Increment pointers and decrement length */
wolfSSL 11:cee25a834751 269 input += 16;
wolfSSL 11:cee25a834751 270 output += 16;
wolfSSL 11:cee25a834751 271 msglen -= 16;
wolfSSL 11:cee25a834751 272 }
wolfSSL 11:cee25a834751 273
wolfSSL 11:cee25a834751 274 /* Encrypt/decrypt remaining data */
wolfSSL 11:cee25a834751 275 if (msglen) {
wolfSSL 11:cee25a834751 276
wolfSSL 11:cee25a834751 277 word32 i;
wolfSSL 11:cee25a834751 278 word32 tmp[4];
wolfSSL 11:cee25a834751 279 byte* buffer = (byte*)tmp;
wolfSSL 11:cee25a834751 280
wolfSSL 11:cee25a834751 281 XMEMSET(tmp, 0, sizeof(tmp)); /* help static analysis */
wolfSSL 11:cee25a834751 282
wolfSSL 11:cee25a834751 283 /* Iterate the system */
wolfSSL 11:cee25a834751 284 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 11:cee25a834751 285
wolfSSL 11:cee25a834751 286 /* Generate 16 bytes of pseudo-random data */
wolfSSL 11:cee25a834751 287 tmp[0] = LITTLE32(ctx->workCtx.x[0] ^
wolfSSL 11:cee25a834751 288 (ctx->workCtx.x[5]>>16) ^ U32V(ctx->workCtx.x[3]<<16));
wolfSSL 11:cee25a834751 289 tmp[1] = LITTLE32(ctx->workCtx.x[2] ^
wolfSSL 11:cee25a834751 290 (ctx->workCtx.x[7]>>16) ^ U32V(ctx->workCtx.x[5]<<16));
wolfSSL 11:cee25a834751 291 tmp[2] = LITTLE32(ctx->workCtx.x[4] ^
wolfSSL 11:cee25a834751 292 (ctx->workCtx.x[1]>>16) ^ U32V(ctx->workCtx.x[7]<<16));
wolfSSL 11:cee25a834751 293 tmp[3] = LITTLE32(ctx->workCtx.x[6] ^
wolfSSL 11:cee25a834751 294 (ctx->workCtx.x[3]>>16) ^ U32V(ctx->workCtx.x[1]<<16));
wolfSSL 11:cee25a834751 295
wolfSSL 11:cee25a834751 296 /* Encrypt/decrypt the data */
wolfSSL 11:cee25a834751 297 for (i=0; i<msglen; i++)
wolfSSL 11:cee25a834751 298 output[i] = input[i] ^ buffer[i];
wolfSSL 11:cee25a834751 299 }
wolfSSL 11:cee25a834751 300
wolfSSL 11:cee25a834751 301 return 0;
wolfSSL 11:cee25a834751 302 }
wolfSSL 11:cee25a834751 303
wolfSSL 11:cee25a834751 304
wolfSSL 11:cee25a834751 305 /* Encrypt/decrypt a message of any size */
wolfSSL 11:cee25a834751 306 int wc_RabbitProcess(Rabbit* ctx, byte* output, const byte* input, word32 msglen)
wolfSSL 11:cee25a834751 307 {
wolfSSL 11:cee25a834751 308 #ifdef XSTREAM_ALIGN
wolfSSL 11:cee25a834751 309 if ((wolfssl_word)input % 4 || (wolfssl_word)output % 4) {
wolfSSL 11:cee25a834751 310 #ifndef NO_WOLFSSL_ALLOC_ALIGN
wolfSSL 11:cee25a834751 311 byte* tmp;
wolfSSL 11:cee25a834751 312 WOLFSSL_MSG("wc_RabbitProcess unaligned");
wolfSSL 11:cee25a834751 313
wolfSSL 11:cee25a834751 314 tmp = (byte*)XMALLOC(msglen, ctx->heap, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 11:cee25a834751 315 if (tmp == NULL) return MEMORY_E;
wolfSSL 11:cee25a834751 316
wolfSSL 11:cee25a834751 317 XMEMCPY(tmp, input, msglen);
wolfSSL 11:cee25a834751 318 DoProcess(ctx, tmp, tmp, msglen);
wolfSSL 11:cee25a834751 319 XMEMCPY(output, tmp, msglen);
wolfSSL 11:cee25a834751 320
wolfSSL 11:cee25a834751 321 XFREE(tmp, ctx->heap, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 11:cee25a834751 322
wolfSSL 11:cee25a834751 323 return 0;
wolfSSL 11:cee25a834751 324 #else
wolfSSL 11:cee25a834751 325 return BAD_ALIGN_E;
wolfSSL 11:cee25a834751 326 #endif
wolfSSL 11:cee25a834751 327 }
wolfSSL 11:cee25a834751 328 #endif /* XSTREAM_ALIGN */
wolfSSL 11:cee25a834751 329
wolfSSL 11:cee25a834751 330 return DoProcess(ctx, output, input, msglen);
wolfSSL 11:cee25a834751 331 }
wolfSSL 11:cee25a834751 332
wolfSSL 11:cee25a834751 333
wolfSSL 11:cee25a834751 334 #endif /* NO_RABBIT */
wolfSSL 11:cee25a834751 335