Xuyi Wang / wolfSSL

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wolfcrypt/src/rabbit.c@4:1b0d80432c79, 2016-04-28 (annotated)

Committer:
wolfSSL
Date:
Thu Apr 28 00:57:21 2016 +0000
Revision:
4:1b0d80432c79
wolfSSL 3.9.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 4:1b0d80432c79 1 /* rabbit.c
wolfSSL 4:1b0d80432c79 2 *
wolfSSL 4:1b0d80432c79 3 * Copyright (C) 2006-2016 wolfSSL Inc.
wolfSSL 4:1b0d80432c79 4 *
wolfSSL 4:1b0d80432c79 5 * This file is part of wolfSSL.
wolfSSL 4:1b0d80432c79 6 *
wolfSSL 4:1b0d80432c79 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 4:1b0d80432c79 8 * it under the terms of the GNU General Public License as published by
wolfSSL 4:1b0d80432c79 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 4:1b0d80432c79 10 * (at your option) any later version.
wolfSSL 4:1b0d80432c79 11 *
wolfSSL 4:1b0d80432c79 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 4:1b0d80432c79 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 4:1b0d80432c79 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 4:1b0d80432c79 15 * GNU General Public License for more details.
wolfSSL 4:1b0d80432c79 16 *
wolfSSL 4:1b0d80432c79 17 * You should have received a copy of the GNU General Public License
wolfSSL 4:1b0d80432c79 18 * along with this program; if not, write to the Free Software
wolfSSL 4:1b0d80432c79 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 4:1b0d80432c79 20 */
wolfSSL 4:1b0d80432c79 21
wolfSSL 4:1b0d80432c79 22
wolfSSL 4:1b0d80432c79 23 #ifdef HAVE_CONFIG_H
wolfSSL 4:1b0d80432c79 24 #include <config.h>
wolfSSL 4:1b0d80432c79 25 #endif
wolfSSL 4:1b0d80432c79 26
wolfSSL 4:1b0d80432c79 27 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 4:1b0d80432c79 28
wolfSSL 4:1b0d80432c79 29 #ifndef NO_RABBIT
wolfSSL 4:1b0d80432c79 30
wolfSSL 4:1b0d80432c79 31 #include <wolfssl/wolfcrypt/rabbit.h>
wolfSSL 4:1b0d80432c79 32 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 4:1b0d80432c79 33 #include <wolfssl/wolfcrypt/logging.h>
wolfSSL 4:1b0d80432c79 34 #ifdef NO_INLINE
wolfSSL 4:1b0d80432c79 35 #include <wolfssl/wolfcrypt/misc.h>
wolfSSL 4:1b0d80432c79 36 #else
wolfSSL 4:1b0d80432c79 37 #include <wolfcrypt/src/misc.c>
wolfSSL 4:1b0d80432c79 38 #endif
wolfSSL 4:1b0d80432c79 39
wolfSSL 4:1b0d80432c79 40
wolfSSL 4:1b0d80432c79 41 #ifdef BIG_ENDIAN_ORDER
wolfSSL 4:1b0d80432c79 42 #define LITTLE32(x) ByteReverseWord32(x)
wolfSSL 4:1b0d80432c79 43 #else
wolfSSL 4:1b0d80432c79 44 #define LITTLE32(x) (x)
wolfSSL 4:1b0d80432c79 45 #endif
wolfSSL 4:1b0d80432c79 46
wolfSSL 4:1b0d80432c79 47 #define U32V(x) ((word32)(x) & 0xFFFFFFFFU)
wolfSSL 4:1b0d80432c79 48
wolfSSL 4:1b0d80432c79 49
wolfSSL 4:1b0d80432c79 50 /* Square a 32-bit unsigned integer to obtain the 64-bit result and return */
wolfSSL 4:1b0d80432c79 51 /* the upper 32 bits XOR the lower 32 bits */
wolfSSL 4:1b0d80432c79 52 static word32 RABBIT_g_func(word32 x)
wolfSSL 4:1b0d80432c79 53 {
wolfSSL 4:1b0d80432c79 54 /* Temporary variables */
wolfSSL 4:1b0d80432c79 55 word32 a, b, h, l;
wolfSSL 4:1b0d80432c79 56
wolfSSL 4:1b0d80432c79 57 /* Construct high and low argument for squaring */
wolfSSL 4:1b0d80432c79 58 a = x&0xFFFF;
wolfSSL 4:1b0d80432c79 59 b = x>>16;
wolfSSL 4:1b0d80432c79 60
wolfSSL 4:1b0d80432c79 61 /* Calculate high and low result of squaring */
wolfSSL 4:1b0d80432c79 62 h = (((U32V(a*a)>>17) + U32V(a*b))>>15) + b*b;
wolfSSL 4:1b0d80432c79 63 l = x*x;
wolfSSL 4:1b0d80432c79 64
wolfSSL 4:1b0d80432c79 65 /* Return high XOR low */
wolfSSL 4:1b0d80432c79 66 return U32V(h^l);
wolfSSL 4:1b0d80432c79 67 }
wolfSSL 4:1b0d80432c79 68
wolfSSL 4:1b0d80432c79 69
wolfSSL 4:1b0d80432c79 70 /* Calculate the next internal state */
wolfSSL 4:1b0d80432c79 71 static void RABBIT_next_state(RabbitCtx* ctx)
wolfSSL 4:1b0d80432c79 72 {
wolfSSL 4:1b0d80432c79 73 /* Temporary variables */
wolfSSL 4:1b0d80432c79 74 word32 g[8], c_old[8], i;
wolfSSL 4:1b0d80432c79 75
wolfSSL 4:1b0d80432c79 76 /* Save old counter values */
wolfSSL 4:1b0d80432c79 77 for (i=0; i<8; i++)
wolfSSL 4:1b0d80432c79 78 c_old[i] = ctx->c[i];
wolfSSL 4:1b0d80432c79 79
wolfSSL 4:1b0d80432c79 80 /* Calculate new counter values */
wolfSSL 4:1b0d80432c79 81 ctx->c[0] = U32V(ctx->c[0] + 0x4D34D34D + ctx->carry);
wolfSSL 4:1b0d80432c79 82 ctx->c[1] = U32V(ctx->c[1] + 0xD34D34D3 + (ctx->c[0] < c_old[0]));
wolfSSL 4:1b0d80432c79 83 ctx->c[2] = U32V(ctx->c[2] + 0x34D34D34 + (ctx->c[1] < c_old[1]));
wolfSSL 4:1b0d80432c79 84 ctx->c[3] = U32V(ctx->c[3] + 0x4D34D34D + (ctx->c[2] < c_old[2]));
wolfSSL 4:1b0d80432c79 85 ctx->c[4] = U32V(ctx->c[4] + 0xD34D34D3 + (ctx->c[3] < c_old[3]));
wolfSSL 4:1b0d80432c79 86 ctx->c[5] = U32V(ctx->c[5] + 0x34D34D34 + (ctx->c[4] < c_old[4]));
wolfSSL 4:1b0d80432c79 87 ctx->c[6] = U32V(ctx->c[6] + 0x4D34D34D + (ctx->c[5] < c_old[5]));
wolfSSL 4:1b0d80432c79 88 ctx->c[7] = U32V(ctx->c[7] + 0xD34D34D3 + (ctx->c[6] < c_old[6]));
wolfSSL 4:1b0d80432c79 89 ctx->carry = (ctx->c[7] < c_old[7]);
wolfSSL 4:1b0d80432c79 90
wolfSSL 4:1b0d80432c79 91 /* Calculate the g-values */
wolfSSL 4:1b0d80432c79 92 for (i=0;i<8;i++)
wolfSSL 4:1b0d80432c79 93 g[i] = RABBIT_g_func(U32V(ctx->x[i] + ctx->c[i]));
wolfSSL 4:1b0d80432c79 94
wolfSSL 4:1b0d80432c79 95 /* Calculate new state values */
wolfSSL 4:1b0d80432c79 96 ctx->x[0] = U32V(g[0] + rotlFixed(g[7],16) + rotlFixed(g[6], 16));
wolfSSL 4:1b0d80432c79 97 ctx->x[1] = U32V(g[1] + rotlFixed(g[0], 8) + g[7]);
wolfSSL 4:1b0d80432c79 98 ctx->x[2] = U32V(g[2] + rotlFixed(g[1],16) + rotlFixed(g[0], 16));
wolfSSL 4:1b0d80432c79 99 ctx->x[3] = U32V(g[3] + rotlFixed(g[2], 8) + g[1]);
wolfSSL 4:1b0d80432c79 100 ctx->x[4] = U32V(g[4] + rotlFixed(g[3],16) + rotlFixed(g[2], 16));
wolfSSL 4:1b0d80432c79 101 ctx->x[5] = U32V(g[5] + rotlFixed(g[4], 8) + g[3]);
wolfSSL 4:1b0d80432c79 102 ctx->x[6] = U32V(g[6] + rotlFixed(g[5],16) + rotlFixed(g[4], 16));
wolfSSL 4:1b0d80432c79 103 ctx->x[7] = U32V(g[7] + rotlFixed(g[6], 8) + g[5]);
wolfSSL 4:1b0d80432c79 104 }
wolfSSL 4:1b0d80432c79 105
wolfSSL 4:1b0d80432c79 106
wolfSSL 4:1b0d80432c79 107 /* IV setup */
wolfSSL 4:1b0d80432c79 108 static void wc_RabbitSetIV(Rabbit* ctx, const byte* inIv)
wolfSSL 4:1b0d80432c79 109 {
wolfSSL 4:1b0d80432c79 110 /* Temporary variables */
wolfSSL 4:1b0d80432c79 111 word32 i0, i1, i2, i3, i;
wolfSSL 4:1b0d80432c79 112 word32 iv[2];
wolfSSL 4:1b0d80432c79 113
wolfSSL 4:1b0d80432c79 114 if (inIv)
wolfSSL 4:1b0d80432c79 115 XMEMCPY(iv, inIv, sizeof(iv));
wolfSSL 4:1b0d80432c79 116 else
wolfSSL 4:1b0d80432c79 117 XMEMSET(iv, 0, sizeof(iv));
wolfSSL 4:1b0d80432c79 118
wolfSSL 4:1b0d80432c79 119 /* Generate four subvectors */
wolfSSL 4:1b0d80432c79 120 i0 = LITTLE32(iv[0]);
wolfSSL 4:1b0d80432c79 121 i2 = LITTLE32(iv[1]);
wolfSSL 4:1b0d80432c79 122 i1 = (i0>>16) | (i2&0xFFFF0000);
wolfSSL 4:1b0d80432c79 123 i3 = (i2<<16) | (i0&0x0000FFFF);
wolfSSL 4:1b0d80432c79 124
wolfSSL 4:1b0d80432c79 125 /* Modify counter values */
wolfSSL 4:1b0d80432c79 126 ctx->workCtx.c[0] = ctx->masterCtx.c[0] ^ i0;
wolfSSL 4:1b0d80432c79 127 ctx->workCtx.c[1] = ctx->masterCtx.c[1] ^ i1;
wolfSSL 4:1b0d80432c79 128 ctx->workCtx.c[2] = ctx->masterCtx.c[2] ^ i2;
wolfSSL 4:1b0d80432c79 129 ctx->workCtx.c[3] = ctx->masterCtx.c[3] ^ i3;
wolfSSL 4:1b0d80432c79 130 ctx->workCtx.c[4] = ctx->masterCtx.c[4] ^ i0;
wolfSSL 4:1b0d80432c79 131 ctx->workCtx.c[5] = ctx->masterCtx.c[5] ^ i1;
wolfSSL 4:1b0d80432c79 132 ctx->workCtx.c[6] = ctx->masterCtx.c[6] ^ i2;
wolfSSL 4:1b0d80432c79 133 ctx->workCtx.c[7] = ctx->masterCtx.c[7] ^ i3;
wolfSSL 4:1b0d80432c79 134
wolfSSL 4:1b0d80432c79 135 /* Copy state variables */
wolfSSL 4:1b0d80432c79 136 for (i=0; i<8; i++)
wolfSSL 4:1b0d80432c79 137 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 4:1b0d80432c79 138 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 4:1b0d80432c79 139
wolfSSL 4:1b0d80432c79 140 /* Iterate the system four times */
wolfSSL 4:1b0d80432c79 141 for (i=0; i<4; i++)
wolfSSL 4:1b0d80432c79 142 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 4:1b0d80432c79 143 }
wolfSSL 4:1b0d80432c79 144
wolfSSL 4:1b0d80432c79 145
wolfSSL 4:1b0d80432c79 146 /* Key setup */
wolfSSL 4:1b0d80432c79 147 static INLINE int DoKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 4:1b0d80432c79 148 {
wolfSSL 4:1b0d80432c79 149 /* Temporary variables */
wolfSSL 4:1b0d80432c79 150 word32 k0, k1, k2, k3, i;
wolfSSL 4:1b0d80432c79 151
wolfSSL 4:1b0d80432c79 152 /* Generate four subkeys */
wolfSSL 4:1b0d80432c79 153 k0 = LITTLE32(*(word32*)(key+ 0));
wolfSSL 4:1b0d80432c79 154 k1 = LITTLE32(*(word32*)(key+ 4));
wolfSSL 4:1b0d80432c79 155 k2 = LITTLE32(*(word32*)(key+ 8));
wolfSSL 4:1b0d80432c79 156 k3 = LITTLE32(*(word32*)(key+12));
wolfSSL 4:1b0d80432c79 157
wolfSSL 4:1b0d80432c79 158 /* Generate initial state variables */
wolfSSL 4:1b0d80432c79 159 ctx->masterCtx.x[0] = k0;
wolfSSL 4:1b0d80432c79 160 ctx->masterCtx.x[2] = k1;
wolfSSL 4:1b0d80432c79 161 ctx->masterCtx.x[4] = k2;
wolfSSL 4:1b0d80432c79 162 ctx->masterCtx.x[6] = k3;
wolfSSL 4:1b0d80432c79 163 ctx->masterCtx.x[1] = U32V(k3<<16) | (k2>>16);
wolfSSL 4:1b0d80432c79 164 ctx->masterCtx.x[3] = U32V(k0<<16) | (k3>>16);
wolfSSL 4:1b0d80432c79 165 ctx->masterCtx.x[5] = U32V(k1<<16) | (k0>>16);
wolfSSL 4:1b0d80432c79 166 ctx->masterCtx.x[7] = U32V(k2<<16) | (k1>>16);
wolfSSL 4:1b0d80432c79 167
wolfSSL 4:1b0d80432c79 168 /* Generate initial counter values */
wolfSSL 4:1b0d80432c79 169 ctx->masterCtx.c[0] = rotlFixed(k2, 16);
wolfSSL 4:1b0d80432c79 170 ctx->masterCtx.c[2] = rotlFixed(k3, 16);
wolfSSL 4:1b0d80432c79 171 ctx->masterCtx.c[4] = rotlFixed(k0, 16);
wolfSSL 4:1b0d80432c79 172 ctx->masterCtx.c[6] = rotlFixed(k1, 16);
wolfSSL 4:1b0d80432c79 173 ctx->masterCtx.c[1] = (k0&0xFFFF0000) | (k1&0xFFFF);
wolfSSL 4:1b0d80432c79 174 ctx->masterCtx.c[3] = (k1&0xFFFF0000) | (k2&0xFFFF);
wolfSSL 4:1b0d80432c79 175 ctx->masterCtx.c[5] = (k2&0xFFFF0000) | (k3&0xFFFF);
wolfSSL 4:1b0d80432c79 176 ctx->masterCtx.c[7] = (k3&0xFFFF0000) | (k0&0xFFFF);
wolfSSL 4:1b0d80432c79 177
wolfSSL 4:1b0d80432c79 178 /* Clear carry bit */
wolfSSL 4:1b0d80432c79 179 ctx->masterCtx.carry = 0;
wolfSSL 4:1b0d80432c79 180
wolfSSL 4:1b0d80432c79 181 /* Iterate the system four times */
wolfSSL 4:1b0d80432c79 182 for (i=0; i<4; i++)
wolfSSL 4:1b0d80432c79 183 RABBIT_next_state(&(ctx->masterCtx));
wolfSSL 4:1b0d80432c79 184
wolfSSL 4:1b0d80432c79 185 /* Modify the counters */
wolfSSL 4:1b0d80432c79 186 for (i=0; i<8; i++)
wolfSSL 4:1b0d80432c79 187 ctx->masterCtx.c[i] ^= ctx->masterCtx.x[(i+4)&0x7];
wolfSSL 4:1b0d80432c79 188
wolfSSL 4:1b0d80432c79 189 /* Copy master instance to work instance */
wolfSSL 4:1b0d80432c79 190 for (i=0; i<8; i++) {
wolfSSL 4:1b0d80432c79 191 ctx->workCtx.x[i] = ctx->masterCtx.x[i];
wolfSSL 4:1b0d80432c79 192 ctx->workCtx.c[i] = ctx->masterCtx.c[i];
wolfSSL 4:1b0d80432c79 193 }
wolfSSL 4:1b0d80432c79 194 ctx->workCtx.carry = ctx->masterCtx.carry;
wolfSSL 4:1b0d80432c79 195
wolfSSL 4:1b0d80432c79 196 wc_RabbitSetIV(ctx, iv);
wolfSSL 4:1b0d80432c79 197
wolfSSL 4:1b0d80432c79 198 return 0;
wolfSSL 4:1b0d80432c79 199 }
wolfSSL 4:1b0d80432c79 200
wolfSSL 4:1b0d80432c79 201
wolfSSL 4:1b0d80432c79 202 /* Key setup */
wolfSSL 4:1b0d80432c79 203 int wc_RabbitSetKey(Rabbit* ctx, const byte* key, const byte* iv)
wolfSSL 4:1b0d80432c79 204 {
wolfSSL 4:1b0d80432c79 205 #ifdef XSTREAM_ALIGN
wolfSSL 4:1b0d80432c79 206 if ((wolfssl_word)key % 4) {
wolfSSL 4:1b0d80432c79 207 int alignKey[4];
wolfSSL 4:1b0d80432c79 208
wolfSSL 4:1b0d80432c79 209 /* iv aligned in SetIV */
wolfSSL 4:1b0d80432c79 210 WOLFSSL_MSG("wc_RabbitSetKey unaligned key");
wolfSSL 4:1b0d80432c79 211
wolfSSL 4:1b0d80432c79 212 XMEMCPY(alignKey, key, sizeof(alignKey));
wolfSSL 4:1b0d80432c79 213
wolfSSL 4:1b0d80432c79 214 return DoKey(ctx, (const byte*)alignKey, iv);
wolfSSL 4:1b0d80432c79 215 }
wolfSSL 4:1b0d80432c79 216 #endif /* XSTREAM_ALIGN */
wolfSSL 4:1b0d80432c79 217
wolfSSL 4:1b0d80432c79 218 return DoKey(ctx, key, iv);
wolfSSL 4:1b0d80432c79 219 }
wolfSSL 4:1b0d80432c79 220
wolfSSL 4:1b0d80432c79 221
wolfSSL 4:1b0d80432c79 222 /* Encrypt/decrypt a message of any size */
wolfSSL 4:1b0d80432c79 223 static INLINE int DoProcess(Rabbit* ctx, byte* output, const byte* input,
wolfSSL 4:1b0d80432c79 224 word32 msglen)
wolfSSL 4:1b0d80432c79 225 {
wolfSSL 4:1b0d80432c79 226 /* Encrypt/decrypt all full blocks */
wolfSSL 4:1b0d80432c79 227 while (msglen >= 16) {
wolfSSL 4:1b0d80432c79 228 /* Iterate the system */
wolfSSL 4:1b0d80432c79 229 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 4:1b0d80432c79 230
wolfSSL 4:1b0d80432c79 231 /* Encrypt/decrypt 16 bytes of data */
wolfSSL 4:1b0d80432c79 232 *(word32*)(output+ 0) = *(word32*)(input+ 0) ^
wolfSSL 4:1b0d80432c79 233 LITTLE32(ctx->workCtx.x[0] ^ (ctx->workCtx.x[5]>>16) ^
wolfSSL 4:1b0d80432c79 234 U32V(ctx->workCtx.x[3]<<16));
wolfSSL 4:1b0d80432c79 235 *(word32*)(output+ 4) = *(word32*)(input+ 4) ^
wolfSSL 4:1b0d80432c79 236 LITTLE32(ctx->workCtx.x[2] ^ (ctx->workCtx.x[7]>>16) ^
wolfSSL 4:1b0d80432c79 237 U32V(ctx->workCtx.x[5]<<16));
wolfSSL 4:1b0d80432c79 238 *(word32*)(output+ 8) = *(word32*)(input+ 8) ^
wolfSSL 4:1b0d80432c79 239 LITTLE32(ctx->workCtx.x[4] ^ (ctx->workCtx.x[1]>>16) ^
wolfSSL 4:1b0d80432c79 240 U32V(ctx->workCtx.x[7]<<16));
wolfSSL 4:1b0d80432c79 241 *(word32*)(output+12) = *(word32*)(input+12) ^
wolfSSL 4:1b0d80432c79 242 LITTLE32(ctx->workCtx.x[6] ^ (ctx->workCtx.x[3]>>16) ^
wolfSSL 4:1b0d80432c79 243 U32V(ctx->workCtx.x[1]<<16));
wolfSSL 4:1b0d80432c79 244
wolfSSL 4:1b0d80432c79 245 /* Increment pointers and decrement length */
wolfSSL 4:1b0d80432c79 246 input += 16;
wolfSSL 4:1b0d80432c79 247 output += 16;
wolfSSL 4:1b0d80432c79 248 msglen -= 16;
wolfSSL 4:1b0d80432c79 249 }
wolfSSL 4:1b0d80432c79 250
wolfSSL 4:1b0d80432c79 251 /* Encrypt/decrypt remaining data */
wolfSSL 4:1b0d80432c79 252 if (msglen) {
wolfSSL 4:1b0d80432c79 253
wolfSSL 4:1b0d80432c79 254 word32 i;
wolfSSL 4:1b0d80432c79 255 word32 tmp[4];
wolfSSL 4:1b0d80432c79 256 byte* buffer = (byte*)tmp;
wolfSSL 4:1b0d80432c79 257
wolfSSL 4:1b0d80432c79 258 XMEMSET(tmp, 0, sizeof(tmp)); /* help static analysis */
wolfSSL 4:1b0d80432c79 259
wolfSSL 4:1b0d80432c79 260 /* Iterate the system */
wolfSSL 4:1b0d80432c79 261 RABBIT_next_state(&(ctx->workCtx));
wolfSSL 4:1b0d80432c79 262
wolfSSL 4:1b0d80432c79 263 /* Generate 16 bytes of pseudo-random data */
wolfSSL 4:1b0d80432c79 264 tmp[0] = LITTLE32(ctx->workCtx.x[0] ^
wolfSSL 4:1b0d80432c79 265 (ctx->workCtx.x[5]>>16) ^ U32V(ctx->workCtx.x[3]<<16));
wolfSSL 4:1b0d80432c79 266 tmp[1] = LITTLE32(ctx->workCtx.x[2] ^
wolfSSL 4:1b0d80432c79 267 (ctx->workCtx.x[7]>>16) ^ U32V(ctx->workCtx.x[5]<<16));
wolfSSL 4:1b0d80432c79 268 tmp[2] = LITTLE32(ctx->workCtx.x[4] ^
wolfSSL 4:1b0d80432c79 269 (ctx->workCtx.x[1]>>16) ^ U32V(ctx->workCtx.x[7]<<16));
wolfSSL 4:1b0d80432c79 270 tmp[3] = LITTLE32(ctx->workCtx.x[6] ^
wolfSSL 4:1b0d80432c79 271 (ctx->workCtx.x[3]>>16) ^ U32V(ctx->workCtx.x[1]<<16));
wolfSSL 4:1b0d80432c79 272
wolfSSL 4:1b0d80432c79 273 /* Encrypt/decrypt the data */
wolfSSL 4:1b0d80432c79 274 for (i=0; i<msglen; i++)
wolfSSL 4:1b0d80432c79 275 output[i] = input[i] ^ buffer[i];
wolfSSL 4:1b0d80432c79 276 }
wolfSSL 4:1b0d80432c79 277
wolfSSL 4:1b0d80432c79 278 return 0;
wolfSSL 4:1b0d80432c79 279 }
wolfSSL 4:1b0d80432c79 280
wolfSSL 4:1b0d80432c79 281
wolfSSL 4:1b0d80432c79 282 /* Encrypt/decrypt a message of any size */
wolfSSL 4:1b0d80432c79 283 int wc_RabbitProcess(Rabbit* ctx, byte* output, const byte* input, word32 msglen)
wolfSSL 4:1b0d80432c79 284 {
wolfSSL 4:1b0d80432c79 285 #ifdef XSTREAM_ALIGN
wolfSSL 4:1b0d80432c79 286 if ((wolfssl_word)input % 4 || (wolfssl_word)output % 4) {
wolfSSL 4:1b0d80432c79 287 #ifndef NO_WOLFSSL_ALLOC_ALIGN
wolfSSL 4:1b0d80432c79 288 byte* tmp;
wolfSSL 4:1b0d80432c79 289 WOLFSSL_MSG("wc_RabbitProcess unaligned");
wolfSSL 4:1b0d80432c79 290
wolfSSL 4:1b0d80432c79 291 tmp = (byte*)XMALLOC(msglen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 4:1b0d80432c79 292 if (tmp == NULL) return MEMORY_E;
wolfSSL 4:1b0d80432c79 293
wolfSSL 4:1b0d80432c79 294 XMEMCPY(tmp, input, msglen);
wolfSSL 4:1b0d80432c79 295 DoProcess(ctx, tmp, tmp, msglen);
wolfSSL 4:1b0d80432c79 296 XMEMCPY(output, tmp, msglen);
wolfSSL 4:1b0d80432c79 297
wolfSSL 4:1b0d80432c79 298 XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 4:1b0d80432c79 299
wolfSSL 4:1b0d80432c79 300 return 0;
wolfSSL 4:1b0d80432c79 301 #else
wolfSSL 4:1b0d80432c79 302 return BAD_ALIGN_E;
wolfSSL 4:1b0d80432c79 303 #endif
wolfSSL 4:1b0d80432c79 304 }
wolfSSL 4:1b0d80432c79 305 #endif /* XSTREAM_ALIGN */
wolfSSL 4:1b0d80432c79 306
wolfSSL 4:1b0d80432c79 307 return DoProcess(ctx, output, input, msglen);
wolfSSL 4:1b0d80432c79 308 }
wolfSSL 4:1b0d80432c79 309
wolfSSL 4:1b0d80432c79 310
wolfSSL 4:1b0d80432c79 311 #endif /* NO_RABBIT */
wolfSSL 4:1b0d80432c79 312