wolf SSL / wolfSSL-TLS13-Beta

wolfSSL 3.11.1 for TLS1.3 beta

Fork of wolfSSL by wolf SSL

wolfcrypt/src/rabbit.c@0:d92f9d21154c, 2015-06-26 (annotated)

Committer:
wolfSSL
Date:
Fri Jun 26 00:39:20 2015 +0000
Revision:
0:d92f9d21154c
wolfSSL 3.6.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:d92f9d21154c 1 /* rabbit.c
wolfSSL 0:d92f9d21154c 2 *
wolfSSL 0:d92f9d21154c 3 * Copyright (C) 2006-2015 wolfSSL Inc.
wolfSSL 0:d92f9d21154c 4 *
wolfSSL 0:d92f9d21154c 5 * This file is part of wolfSSL. (formerly known as CyaSSL)
wolfSSL 0:d92f9d21154c 6 *
wolfSSL 0:d92f9d21154c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 0:d92f9d21154c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:d92f9d21154c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:d92f9d21154c 10 * (at your option) any later version.
wolfSSL 0:d92f9d21154c 11 *
wolfSSL 0:d92f9d21154c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 0:d92f9d21154c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:d92f9d21154c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:d92f9d21154c 15 * GNU General Public License for more details.
wolfSSL 0:d92f9d21154c 16 *
wolfSSL 0:d92f9d21154c 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:d92f9d21154c 18 * along with this program; if not, write to the Free Software
wolfSSL 0:d92f9d21154c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:d92f9d21154c 20 */
wolfSSL 0:d92f9d21154c 21
wolfSSL 0:d92f9d21154c 22 #ifdef HAVE_CONFIG_H
wolfSSL 0:d92f9d21154c 23 #include <config.h>
wolfSSL 0:d92f9d21154c 24 #endif
wolfSSL 0:d92f9d21154c 25
wolfSSL 0:d92f9d21154c 26 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 0:d92f9d21154c 27
wolfSSL 0:d92f9d21154c 28 #ifndef NO_RABBIT
wolfSSL 0:d92f9d21154c 29
wolfSSL 0:d92f9d21154c 30 #include <wolfssl/wolfcrypt/rabbit.h>
wolfSSL 0:d92f9d21154c 31 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 0:d92f9d21154c 32 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 0:d92f9d21154c 33 #ifdef NO_INLINE
wolfSSL 0:d92f9d21154c 34 #include <wolfssl/wolfcrypt/misc.h>
wolfSSL 0:d92f9d21154c 35 #else
wolfSSL 0:d92f9d21154c 36 #include <wolfcrypt/src/misc.c>
wolfSSL 0:d92f9d21154c 37 #endif
wolfSSL 0:d92f9d21154c 38
wolfSSL 0:d92f9d21154c 39
wolfSSL 0:d92f9d21154c 40 #ifdef BIG_ENDIAN_ORDER
wolfSSL 0:d92f9d21154c 41 #define LITTLE32(x) ByteReverseWord32(x)
wolfSSL 0:d92f9d21154c 42 #else
wolfSSL 0:d92f9d21154c 43 #define LITTLE32(x) (x)
wolfSSL 0:d92f9d21154c 44 #endif
wolfSSL 0:d92f9d21154c 45
wolfSSL 0:d92f9d21154c 46 #define U32V(x) ((word32)(x) & 0xFFFFFFFFU)
wolfSSL 0:d92f9d21154c 47
wolfSSL 0:d92f9d21154c 48
wolfSSL 0:d92f9d21154c 49 /* Square a 32-bit unsigned integer to obtain the 64-bit result and return */
wolfSSL 0:d92f9d21154c 50 /* the upper 32 bits XOR the lower 32 bits */
wolfSSL 0:d92f9d21154c 51 static word32 RABBIT_g_func(word32 x)
wolfSSL 0:d92f9d21154c 52 {
wolfSSL 0:d92f9d21154c 53 /* Temporary variables */
wolfSSL 0:d92f9d21154c 54 word32 a, b, h, l;
wolfSSL 0:d92f9d21154c 55
wolfSSL 0:d92f9d21154c 56 /* Construct high and low argument for squaring */
wolfSSL 0:d92f9d21154c 57 a = x&0xFFFF;
wolfSSL 0:d92f9d21154c 58 b = x>>16;
wolfSSL 0:d92f9d21154c 59
wolfSSL 0:d92f9d21154c 60 /* Calculate high and low result of squaring */
wolfSSL 0:d92f9d21154c 61 h = (((U32V(a*a)>>17) + U32V(a*b))>>15) + b*b;
wolfSSL 0:d92f9d21154c 62 l = x*x;
wolfSSL 0:d92f9d21154c 63
wolfSSL 0:d92f9d21154c 64 /* Return high XOR low */
wolfSSL 0:d92f9d21154c 65 return U32V(h^l);
wolfSSL 0:d92f9d21154c 66 }
wolfSSL 0:d92f9d21154c 67
wolfSSL 0:d92f9d21154c 68
wolfSSL 0:d92f9d21154c 69 /* Calculate the next internal state */
wolfSSL 0:d92f9d21154c 70 static void RABBIT_next_state(RabbitCtx* ctx)
wolfSSL 0:d92f9d21154c 71 {
wolfSSL 0:d92f9d21154c 72 /* Temporary variables */
wolfSSL 0:d92f9d21154c 73 word32 g[8], c_old[8], i;
wolfSSL 0:d92f9d21154c 74
wolfSSL 0:d92f9d21154c 75 /* Save old counter values */
wolfSSL 0:d92f9d21154c 76 for (i=0; i<8; i++)
wolfSSL 0:d92f9d21154c 77 c_old[i] = ctx->c[i];
wolfSSL 0:d92f9d21154c 78
wolfSSL 0:d92f9d21154c 79 /* Calculate new counter values */
wolfSSL 0:d92f9d21154c 80 ctx->c[0] = U32V(ctx->c[0] + 0x4D34D34D + ctx->carry);
wolfSSL 0:d92f9d21154c 81 ctx->c[1] = U32V(ctx->c[1] + 0xD34D34D3 + (ctx->c[0] < c_old[0]));
wolfSSL 0:d92f9d21154c 82 ctx->c[2] = U32V(ctx->c[2] + 0x34D34D34 + (ctx->c[1] < c_old[1]));
wolfSSL 0:d92f9d21154c 83 ctx->c[3] = U32V(ctx->c[3] + 0x4D34D34D + (ctx->c[2] < c_old[2]));
wolfSSL 0:d92f9d21154c 84 ctx->c[4] = U32V(ctx->c[4] + 0xD34D34D3 + (ctx->c[3] < c_old[3]));
wolfSSL 0:d92f9d21154c 85 ctx->c[5] = U32V(ctx->c[5] + 0x34D34D34 + (ctx->c[4] < c_old[4]));
wolfSSL 0:d92f9d21154c 86 ctx->c[6] = U32V(ctx->c[6] + 0x4D34D34D + (ctx->c[5] < c_old[5]));
wolfSSL 0:d92f9d21154c 87 ctx->c[7] = U32V(ctx->c[7] + 0xD34D34D3 + (ctx->c[6] < c_old[6]));
wolfSSL 0:d92f9d21154c 88 ctx->carry = (ctx->c[7] < c_old[7]);
wolfSSL 0:d92f9d21154c 89
wolfSSL 0:d92f9d21154c 90 /* Calculate the g-values */
wolfSSL 0:d92f9d21154c 91 for (i=0;i<8;i++)
wolfSSL 0:d92f9d21154c 92 g[i] = RABBIT_g_func(U32V(ctx->x[i] + ctx->c[i]));
wolfSSL 0:d92f9d21154c 93
wolfSSL 0:d92f9d21154c 94 /* Calculate new state values */
wolfSSL 0:d92f9d21154c 95 ctx->x[0] = U32V(g[0] + rotlFixed(g[7],16) + rotlFixed(g[6], 16));
wolfSSL 0:d92f9d21154c 96 ctx->x[1] = U32V(g[1] + rotlFixed(g[0], 8) + g[7]);
wolfSSL 0:d92f9d21154c 97 ctx->x[2] = U32V(g[2] + rotlFixed(g[1],16) + rotlFixed(g[0], 16));
wolfSSL 0:d92f9d21154c 98 ctx->x[3] = U32V(g[3] + rotlFixed(g[2], 8) + g[1]);
wolfSSL 0:d92f9d21154c 99 ctx->x[4] = U32V(g[4] + rotlFixed(g[3],16) + rotlFixed(g[2], 16));
wolfSSL 0:d92f9d21154c 100 ctx->x[5] = U32V(g[5] + rotlFixed(g[4], 8) + g[3]);
wolfSSL 0:d92f9d21154c 101 ctx->x[6] = U32V(g[6] + rotlFixed(g[5],16) + rotlFixed(g[4], 16));
wolfSSL 0:d92f9d21154c 102 ctx->x[7] = U32V(g[7] + rotlFixed(g[6], 8) + g[5]);
wolfSSL 0:d92f9d21154c 103 }
wolfSSL 0:d92f9d21154c 104
wolfSSL 0:d92f9d21154c 105
wolfSSL 0:d92f9d21154c 106 /* IV setup */
wolfSSL 0:d92f9d21154c 107 static void wc_RabbitSetIV(Rabbit* ctx, const byte* inIv)
wolfSSL 0:d92f9d21154c 108 {
wolfSSL 0:d92f9d21154c 109 /* Temporary variables */
wolfSSL 0:d92f9d21154c 110 word32 i0, i1, i2, i3, i;
wolfSSL 0:d92f9d21154c 111 word32 iv[2];
wolfSSL 0:d92f9d21154c 112
wolfSSL 0:d92f9d21154c 113 if (inIv)
wolfSSL 0:d92f9d21154c 114 XMEMCPY(iv, inIv, sizeof(iv));
wolfSSL 0:d92f9d21154c 115 else
wolfSSL 0:d92f9d21154c 116 XMEMSET(iv, 0, sizeof(iv));
wolfSSL 0:d92f9d21154c 117
wolfSSL 0:d92f9d21154c 118 /* Generate four subvectors */
wolfSSL 0:d92f9d21154c 119 i0 = LITTLE32(iv[0]);
wolfSSL 0:d92f9d21154c 120 i2 = LITTLE32(iv[1]);
wolfSSL 0:d92f9d21154c 121 i1 = (i0>>16) | (i2&0xFFFF0000);
wolfSSL 0:d92f9d21154c 122 i3 = (i2<<16) | (i0&0x0000FFFF);
wolfSSL 0:d92f9d21154c 123
wolfSSL 0:d92f9d21154c 124 /* Modify counter values */
wolfSSL 0:d92f9d21154c 125 ctx->workCtx.c[0] = ctx->masterCtx.c[0] ^ i0;
wolfSSL 0:d92f9d21154c 126 ctx->workCtx.c[1] = ctx->masterCtx.c[1] ^ i1;
wolfSSL 0:d92f9d21154c 127 ctx->workCtx.c[2] = ctx->masterCtx.c[2] ^ i2;
wolfSSL 0:d92f9d21154c 128 ctx->workCtx.c[3] = ctx->masterCtx.c[3] ^ i3;
wolfSSL 0:d92f9d21154c 129 ctx->workCtx.c[4] = ctx->masterCtx.c[4] ^ i0;
wolfSSL 0:d92f9d21154c 130 ctx->workCtx.c[5] = ctx->masterCtx.c[5] ^ i1;
wolfSSL 0:d92f9d21154c 131 ctx->workCtx.c[6] = ctx->masterCtx.c[6] ^ i2;
wolfSSL 0:d92f9d21154c 132 ctx->workCtx.c[7] = ctx->masterCtx.c[7] ^ i3;
wolfSSL 0:d92f9d21154c 133
wolfSSL 0:d92f9d21154c 134 /* Copy state variables */
wolfSSL 0:d92f9d21154c 135 for (i=0; i<8; i++)
wolfSSL 0:d92f9d21154c 136 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 0:d92f9d21154c 137 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 0:d92f9d21154c 138
wolfSSL 0:d92f9d21154c 139 /* Iterate the system four times */
wolfSSL 0:d92f9d21154c 140 for (i=0; i<4; i++)
wolfSSL 0:d92f9d21154c 141 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 0:d92f9d21154c 142 }
wolfSSL 0:d92f9d21154c 143
wolfSSL 0:d92f9d21154c 144
wolfSSL 0:d92f9d21154c 145 /* Key setup */
wolfSSL 0:d92f9d21154c 146 static INLINE int DoKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 0:d92f9d21154c 147 {
wolfSSL 0:d92f9d21154c 148 /* Temporary variables */
wolfSSL 0:d92f9d21154c 149 word32 k0, k1, k2, k3, i;
wolfSSL 0:d92f9d21154c 150
wolfSSL 0:d92f9d21154c 151 /* Generate four subkeys */
wolfSSL 0:d92f9d21154c 152 k0 = LITTLE32(*(word32*)(key+ 0));
wolfSSL 0:d92f9d21154c 153 k1 = LITTLE32(*(word32*)(key+ 4));
wolfSSL 0:d92f9d21154c 154 k2 = LITTLE32(*(word32*)(key+ 8));
wolfSSL 0:d92f9d21154c 155 k3 = LITTLE32(*(word32*)(key+12));
wolfSSL 0:d92f9d21154c 156
wolfSSL 0:d92f9d21154c 157 /* Generate initial state variables */
wolfSSL 0:d92f9d21154c 158 ctx->masterCtx.x[0] = k0;
wolfSSL 0:d92f9d21154c 159 ctx->masterCtx.x[2] = k1;
wolfSSL 0:d92f9d21154c 160 ctx->masterCtx.x[4] = k2;
wolfSSL 0:d92f9d21154c 161 ctx->masterCtx.x[6] = k3;
wolfSSL 0:d92f9d21154c 162 ctx->masterCtx.x[1] = U32V(k3<<16) | (k2>>16);
wolfSSL 0:d92f9d21154c 163 ctx->masterCtx.x[3] = U32V(k0<<16) | (k3>>16);
wolfSSL 0:d92f9d21154c 164 ctx->masterCtx.x[5] = U32V(k1<<16) | (k0>>16);
wolfSSL 0:d92f9d21154c 165 ctx->masterCtx.x[7] = U32V(k2<<16) | (k1>>16);
wolfSSL 0:d92f9d21154c 166
wolfSSL 0:d92f9d21154c 167 /* Generate initial counter values */
wolfSSL 0:d92f9d21154c 168 ctx->masterCtx.c[0] = rotlFixed(k2, 16);
wolfSSL 0:d92f9d21154c 169 ctx->masterCtx.c[2] = rotlFixed(k3, 16);
wolfSSL 0:d92f9d21154c 170 ctx->masterCtx.c[4] = rotlFixed(k0, 16);
wolfSSL 0:d92f9d21154c 171 ctx->masterCtx.c[6] = rotlFixed(k1, 16);
wolfSSL 0:d92f9d21154c 172 ctx->masterCtx.c[1] = (k0&0xFFFF0000) | (k1&0xFFFF);
wolfSSL 0:d92f9d21154c 173 ctx->masterCtx.c[3] = (k1&0xFFFF0000) | (k2&0xFFFF);
wolfSSL 0:d92f9d21154c 174 ctx->masterCtx.c[5] = (k2&0xFFFF0000) | (k3&0xFFFF);
wolfSSL 0:d92f9d21154c 175 ctx->masterCtx.c[7] = (k3&0xFFFF0000) | (k0&0xFFFF);
wolfSSL 0:d92f9d21154c 176
wolfSSL 0:d92f9d21154c 177 /* Clear carry bit */
wolfSSL 0:d92f9d21154c 178 ctx->masterCtx.carry = 0;
wolfSSL 0:d92f9d21154c 179
wolfSSL 0:d92f9d21154c 180 /* Iterate the system four times */
wolfSSL 0:d92f9d21154c 181 for (i=0; i<4; i++)
wolfSSL 0:d92f9d21154c 182 RABBIT_next_state(&(ctx->masterCtx));
wolfSSL 0:d92f9d21154c 183
wolfSSL 0:d92f9d21154c 184 /* Modify the counters */
wolfSSL 0:d92f9d21154c 185 for (i=0; i<8; i++)
wolfSSL 0:d92f9d21154c 186 ctx->masterCtx.c[i] ^= ctx->masterCtx.x[(i+4)&0x7];
wolfSSL 0:d92f9d21154c 187
wolfSSL 0:d92f9d21154c 188 /* Copy master instance to work instance */
wolfSSL 0:d92f9d21154c 189 for (i=0; i<8; i++) {
wolfSSL 0:d92f9d21154c 190 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 0:d92f9d21154c 191 ctx->workCtx.c[i] = ctx->masterCtx.c[i];
wolfSSL 0:d92f9d21154c 192 }
wolfSSL 0:d92f9d21154c 193 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 0:d92f9d21154c 194
wolfSSL 0:d92f9d21154c 195 wc_RabbitSetIV(ctx, iv);
wolfSSL 0:d92f9d21154c 196
wolfSSL 0:d92f9d21154c 197 return 0;
wolfSSL 0:d92f9d21154c 198 }
wolfSSL 0:d92f9d21154c 199
wolfSSL 0:d92f9d21154c 200
wolfSSL 0:d92f9d21154c 201 /* Key setup */
wolfSSL 0:d92f9d21154c 202 int wc_RabbitSetKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 0:d92f9d21154c 203 {
wolfSSL 0:d92f9d21154c 204 #ifdef XSTREAM_ALIGN
wolfSSL 0:d92f9d21154c 205 if ((wolfssl_word)key % 4) {
wolfSSL 0:d92f9d21154c 206 int alignKey[4];
wolfSSL 0:d92f9d21154c 207
wolfSSL 0:d92f9d21154c 208 /* iv aligned in SetIV */
wolfSSL 0:d92f9d21154c 209 WOLFSSL_MSG("wc_RabbitSetKey unaligned key");
wolfSSL 0:d92f9d21154c 210
wolfSSL 0:d92f9d21154c 211 XMEMCPY(alignKey, key, sizeof(alignKey));
wolfSSL 0:d92f9d21154c 212
wolfSSL 0:d92f9d21154c 213 return DoKey(ctx, (const byte*)alignKey, iv);
wolfSSL 0:d92f9d21154c 214 }
wolfSSL 0:d92f9d21154c 215 #endif /* XSTREAM_ALIGN */
wolfSSL 0:d92f9d21154c 216
wolfSSL 0:d92f9d21154c 217 return DoKey(ctx, key, iv);
wolfSSL 0:d92f9d21154c 218 }
wolfSSL 0:d92f9d21154c 219
wolfSSL 0:d92f9d21154c 220
wolfSSL 0:d92f9d21154c 221 /* Encrypt/decrypt a message of any size */
wolfSSL 0:d92f9d21154c 222 static INLINE int DoProcess(Rabbit* ctx, byte* output, const byte* input,
wolfSSL 0:d92f9d21154c 223 word32 msglen)
wolfSSL 0:d92f9d21154c 224 {
wolfSSL 0:d92f9d21154c 225 /* Encrypt/decrypt all full blocks */
wolfSSL 0:d92f9d21154c 226 while (msglen >= 16) {
wolfSSL 0:d92f9d21154c 227 /* Iterate the system */
wolfSSL 0:d92f9d21154c 228 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 0:d92f9d21154c 229
wolfSSL 0:d92f9d21154c 230 /* Encrypt/decrypt 16 bytes of data */
wolfSSL 0:d92f9d21154c 231 *(word32*)(output+ 0) = *(word32*)(input+ 0) ^
wolfSSL 0:d92f9d21154c 232 LITTLE32(ctx->workCtx.x[0] ^ (ctx->workCtx.x[5]>>16) ^
wolfSSL 0:d92f9d21154c 233 U32V(ctx->workCtx.x[3]<<16));
wolfSSL 0:d92f9d21154c 234 *(word32*)(output+ 4) = *(word32*)(input+ 4) ^
wolfSSL 0:d92f9d21154c 235 LITTLE32(ctx->workCtx.x[2] ^ (ctx->workCtx.x[7]>>16) ^
wolfSSL 0:d92f9d21154c 236 U32V(ctx->workCtx.x[5]<<16));
wolfSSL 0:d92f9d21154c 237 *(word32*)(output+ 8) = *(word32*)(input+ 8) ^
wolfSSL 0:d92f9d21154c 238 LITTLE32(ctx->workCtx.x[4] ^ (ctx->workCtx.x[1]>>16) ^
wolfSSL 0:d92f9d21154c 239 U32V(ctx->workCtx.x[7]<<16));
wolfSSL 0:d92f9d21154c 240 *(word32*)(output+12) = *(word32*)(input+12) ^
wolfSSL 0:d92f9d21154c 241 LITTLE32(ctx->workCtx.x[6] ^ (ctx->workCtx.x[3]>>16) ^
wolfSSL 0:d92f9d21154c 242 U32V(ctx->workCtx.x[1]<<16));
wolfSSL 0:d92f9d21154c 243
wolfSSL 0:d92f9d21154c 244 /* Increment pointers and decrement length */
wolfSSL 0:d92f9d21154c 245 input += 16;
wolfSSL 0:d92f9d21154c 246 output += 16;
wolfSSL 0:d92f9d21154c 247 msglen -= 16;
wolfSSL 0:d92f9d21154c 248 }
wolfSSL 0:d92f9d21154c 249
wolfSSL 0:d92f9d21154c 250 /* Encrypt/decrypt remaining data */
wolfSSL 0:d92f9d21154c 251 if (msglen) {
wolfSSL 0:d92f9d21154c 252
wolfSSL 0:d92f9d21154c 253 word32 i;
wolfSSL 0:d92f9d21154c 254 word32 tmp[4];
wolfSSL 0:d92f9d21154c 255 byte* buffer = (byte*)tmp;
wolfSSL 0:d92f9d21154c 256
wolfSSL 0:d92f9d21154c 257 XMEMSET(tmp, 0, sizeof(tmp)); /* help static analysis */
wolfSSL 0:d92f9d21154c 258
wolfSSL 0:d92f9d21154c 259 /* Iterate the system */
wolfSSL 0:d92f9d21154c 260 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 0:d92f9d21154c 261
wolfSSL 0:d92f9d21154c 262 /* Generate 16 bytes of pseudo-random data */
wolfSSL 0:d92f9d21154c 263 tmp[0] = LITTLE32(ctx->workCtx.x[0] ^
wolfSSL 0:d92f9d21154c 264 (ctx->workCtx.x[5]>>16) ^ U32V(ctx->workCtx.x[3]<<16));
wolfSSL 0:d92f9d21154c 265 tmp[1] = LITTLE32(ctx->workCtx.x[2] ^
wolfSSL 0:d92f9d21154c 266 (ctx->workCtx.x[7]>>16) ^ U32V(ctx->workCtx.x[5]<<16));
wolfSSL 0:d92f9d21154c 267 tmp[2] = LITTLE32(ctx->workCtx.x[4] ^
wolfSSL 0:d92f9d21154c 268 (ctx->workCtx.x[1]>>16) ^ U32V(ctx->workCtx.x[7]<<16));
wolfSSL 0:d92f9d21154c 269 tmp[3] = LITTLE32(ctx->workCtx.x[6] ^
wolfSSL 0:d92f9d21154c 270 (ctx->workCtx.x[3]>>16) ^ U32V(ctx->workCtx.x[1]<<16));
wolfSSL 0:d92f9d21154c 271
wolfSSL 0:d92f9d21154c 272 /* Encrypt/decrypt the data */
wolfSSL 0:d92f9d21154c 273 for (i=0; i<msglen; i++)
wolfSSL 0:d92f9d21154c 274 output[i] = input[i] ^ buffer[i];
wolfSSL 0:d92f9d21154c 275 }
wolfSSL 0:d92f9d21154c 276
wolfSSL 0:d92f9d21154c 277 return 0;
wolfSSL 0:d92f9d21154c 278 }
wolfSSL 0:d92f9d21154c 279
wolfSSL 0:d92f9d21154c 280
wolfSSL 0:d92f9d21154c 281 /* Encrypt/decrypt a message of any size */
wolfSSL 0:d92f9d21154c 282 int wc_RabbitProcess(Rabbit* ctx, byte* output, const byte* input, word32 msglen)
wolfSSL 0:d92f9d21154c 283 {
wolfSSL 0:d92f9d21154c 284 #ifdef XSTREAM_ALIGN
wolfSSL 0:d92f9d21154c 285 if ((wolfssl_word)input % 4 || (wolfssl_word)output % 4) {
wolfSSL 0:d92f9d21154c 286 #ifndef NO_WOLFSSL_ALLOC_ALIGN
wolfSSL 0:d92f9d21154c 287 byte* tmp;
wolfSSL 0:d92f9d21154c 288 WOLFSSL_MSG("wc_RabbitProcess unaligned");
wolfSSL 0:d92f9d21154c 289
wolfSSL 0:d92f9d21154c 290 tmp = (byte*)XMALLOC(msglen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 0:d92f9d21154c 291 if (tmp == NULL) return MEMORY_E;
wolfSSL 0:d92f9d21154c 292
wolfSSL 0:d92f9d21154c 293 XMEMCPY(tmp, input, msglen);
wolfSSL 0:d92f9d21154c 294 DoProcess(ctx, tmp, tmp, msglen);
wolfSSL 0:d92f9d21154c 295 XMEMCPY(output, tmp, msglen);
wolfSSL 0:d92f9d21154c 296
wolfSSL 0:d92f9d21154c 297 XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 0:d92f9d21154c 298
wolfSSL 0:d92f9d21154c 299 return 0;
wolfSSL 0:d92f9d21154c 300 #else
wolfSSL 0:d92f9d21154c 301 return BAD_ALIGN_E;
wolfSSL 0:d92f9d21154c 302 #endif
wolfSSL 0:d92f9d21154c 303 }
wolfSSL 0:d92f9d21154c 304 #endif /* XSTREAM_ALIGN */
wolfSSL 0:d92f9d21154c 305
wolfSSL 0:d92f9d21154c 306 return DoProcess(ctx, output, input, msglen);
wolfSSL 0:d92f9d21154c 307 }
wolfSSL 0:d92f9d21154c 308
wolfSSL 0:d92f9d21154c 309
wolfSSL 0:d92f9d21154c 310 #endif /* NO_RABBIT */
wolfSSL 0:d92f9d21154c 311