d 0773d / CyaSSL

Fork of CyaSSL for my specific settings

Dependents:   CyaSSL_Example

Fork of CyaSSL by wolf SSL

ctaocrypt/src/hc128.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 /* hc128.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 #ifdef HAVE_HC128
wolfSSL 0:1239e9b70ca2 29
wolfSSL 0:1239e9b70ca2 30 #include <cyassl/ctaocrypt/hc128.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/hc128.h>
wolfSSL 0:1239e9b70ca2 35 #include <cyassl/ctaocrypt/misc.h>
wolfSSL 0:1239e9b70ca2 36 #else
wolfSSL 0:1239e9b70ca2 37 #include <ctaocrypt/src/misc.c>
wolfSSL 0:1239e9b70ca2 38 #endif
wolfSSL 0:1239e9b70ca2 39
wolfSSL 0:1239e9b70ca2 40
wolfSSL 0:1239e9b70ca2 41 #ifdef BIG_ENDIAN_ORDER
wolfSSL 0:1239e9b70ca2 42 #define LITTLE32(x) ByteReverseWord32(x)
wolfSSL 0:1239e9b70ca2 43 #else
wolfSSL 0:1239e9b70ca2 44 #define LITTLE32(x) (x)
wolfSSL 0:1239e9b70ca2 45 #endif
wolfSSL 0:1239e9b70ca2 46
wolfSSL 0:1239e9b70ca2 47
wolfSSL 0:1239e9b70ca2 48 /*h1 function*/
wolfSSL 0:1239e9b70ca2 49 #define h1(ctx, x, y) { \
wolfSSL 0:1239e9b70ca2 50 byte a,c; \
wolfSSL 0:1239e9b70ca2 51 a = (byte) (x); \
wolfSSL 0:1239e9b70ca2 52 c = (byte) ((x) >> 16); \
wolfSSL 0:1239e9b70ca2 53 y = (ctx->T[512+a])+(ctx->T[512+256+c]); \
wolfSSL 0:1239e9b70ca2 54 }
wolfSSL 0:1239e9b70ca2 55
wolfSSL 0:1239e9b70ca2 56 /*h2 function*/
wolfSSL 0:1239e9b70ca2 57 #define h2(ctx, x, y) { \
wolfSSL 0:1239e9b70ca2 58 byte a,c; \
wolfSSL 0:1239e9b70ca2 59 a = (byte) (x); \
wolfSSL 0:1239e9b70ca2 60 c = (byte) ((x) >> 16); \
wolfSSL 0:1239e9b70ca2 61 y = (ctx->T[a])+(ctx->T[256+c]); \
wolfSSL 0:1239e9b70ca2 62 }
wolfSSL 0:1239e9b70ca2 63
wolfSSL 0:1239e9b70ca2 64 /*one step of HC-128, update P and generate 32 bits keystream*/
wolfSSL 0:1239e9b70ca2 65 #define step_P(ctx,u,v,a,b,c,d,n){ \
wolfSSL 0:1239e9b70ca2 66 word32 tem0,tem1,tem2,tem3; \
wolfSSL 0:1239e9b70ca2 67 h1((ctx),(ctx->X[(d)]),tem3); \
wolfSSL 0:1239e9b70ca2 68 tem0 = rotrFixed((ctx->T[(v)]),23); \
wolfSSL 0:1239e9b70ca2 69 tem1 = rotrFixed((ctx->X[(c)]),10); \
wolfSSL 0:1239e9b70ca2 70 tem2 = rotrFixed((ctx->X[(b)]),8); \
wolfSSL 0:1239e9b70ca2 71 (ctx->T[(u)]) += tem2+(tem0 ^ tem1); \
wolfSSL 0:1239e9b70ca2 72 (ctx->X[(a)]) = (ctx->T[(u)]); \
wolfSSL 0:1239e9b70ca2 73 (n) = tem3 ^ (ctx->T[(u)]) ; \
wolfSSL 0:1239e9b70ca2 74 }
wolfSSL 0:1239e9b70ca2 75
wolfSSL 0:1239e9b70ca2 76 /*one step of HC-128, update Q and generate 32 bits keystream*/
wolfSSL 0:1239e9b70ca2 77 #define step_Q(ctx,u,v,a,b,c,d,n){ \
wolfSSL 0:1239e9b70ca2 78 word32 tem0,tem1,tem2,tem3; \
wolfSSL 0:1239e9b70ca2 79 h2((ctx),(ctx->Y[(d)]),tem3); \
wolfSSL 0:1239e9b70ca2 80 tem0 = rotrFixed((ctx->T[(v)]),(32-23)); \
wolfSSL 0:1239e9b70ca2 81 tem1 = rotrFixed((ctx->Y[(c)]),(32-10)); \
wolfSSL 0:1239e9b70ca2 82 tem2 = rotrFixed((ctx->Y[(b)]),(32-8)); \
wolfSSL 0:1239e9b70ca2 83 (ctx->T[(u)]) += tem2 + (tem0 ^ tem1); \
wolfSSL 0:1239e9b70ca2 84 (ctx->Y[(a)]) = (ctx->T[(u)]); \
wolfSSL 0:1239e9b70ca2 85 (n) = tem3 ^ (ctx->T[(u)]) ; \
wolfSSL 0:1239e9b70ca2 86 }
wolfSSL 0:1239e9b70ca2 87
wolfSSL 0:1239e9b70ca2 88 /*16 steps of HC-128, generate 512 bits keystream*/
wolfSSL 0:1239e9b70ca2 89 static void generate_keystream(HC128* ctx, word32* keystream)
wolfSSL 0:1239e9b70ca2 90 {
wolfSSL 0:1239e9b70ca2 91 word32 cc,dd;
wolfSSL 0:1239e9b70ca2 92 cc = ctx->counter1024 & 0x1ff;
wolfSSL 0:1239e9b70ca2 93 dd = (cc+16)&0x1ff;
wolfSSL 0:1239e9b70ca2 94
wolfSSL 0:1239e9b70ca2 95 if (ctx->counter1024 < 512)
wolfSSL 0:1239e9b70ca2 96 {
wolfSSL 0:1239e9b70ca2 97 ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
wolfSSL 0:1239e9b70ca2 98 step_P(ctx, cc+0, cc+1, 0, 6, 13,4, keystream[0]);
wolfSSL 0:1239e9b70ca2 99 step_P(ctx, cc+1, cc+2, 1, 7, 14,5, keystream[1]);
wolfSSL 0:1239e9b70ca2 100 step_P(ctx, cc+2, cc+3, 2, 8, 15,6, keystream[2]);
wolfSSL 0:1239e9b70ca2 101 step_P(ctx, cc+3, cc+4, 3, 9, 0, 7, keystream[3]);
wolfSSL 0:1239e9b70ca2 102 step_P(ctx, cc+4, cc+5, 4, 10,1, 8, keystream[4]);
wolfSSL 0:1239e9b70ca2 103 step_P(ctx, cc+5, cc+6, 5, 11,2, 9, keystream[5]);
wolfSSL 0:1239e9b70ca2 104 step_P(ctx, cc+6, cc+7, 6, 12,3, 10,keystream[6]);
wolfSSL 0:1239e9b70ca2 105 step_P(ctx, cc+7, cc+8, 7, 13,4, 11,keystream[7]);
wolfSSL 0:1239e9b70ca2 106 step_P(ctx, cc+8, cc+9, 8, 14,5, 12,keystream[8]);
wolfSSL 0:1239e9b70ca2 107 step_P(ctx, cc+9, cc+10,9, 15,6, 13,keystream[9]);
wolfSSL 0:1239e9b70ca2 108 step_P(ctx, cc+10,cc+11,10,0, 7, 14,keystream[10]);
wolfSSL 0:1239e9b70ca2 109 step_P(ctx, cc+11,cc+12,11,1, 8, 15,keystream[11]);
wolfSSL 0:1239e9b70ca2 110 step_P(ctx, cc+12,cc+13,12,2, 9, 0, keystream[12]);
wolfSSL 0:1239e9b70ca2 111 step_P(ctx, cc+13,cc+14,13,3, 10,1, keystream[13]);
wolfSSL 0:1239e9b70ca2 112 step_P(ctx, cc+14,cc+15,14,4, 11,2, keystream[14]);
wolfSSL 0:1239e9b70ca2 113 step_P(ctx, cc+15,dd+0, 15,5, 12,3, keystream[15]);
wolfSSL 0:1239e9b70ca2 114 }
wolfSSL 0:1239e9b70ca2 115 else
wolfSSL 0:1239e9b70ca2 116 {
wolfSSL 0:1239e9b70ca2 117 ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
wolfSSL 0:1239e9b70ca2 118 step_Q(ctx, 512+cc+0, 512+cc+1, 0, 6, 13,4, keystream[0]);
wolfSSL 0:1239e9b70ca2 119 step_Q(ctx, 512+cc+1, 512+cc+2, 1, 7, 14,5, keystream[1]);
wolfSSL 0:1239e9b70ca2 120 step_Q(ctx, 512+cc+2, 512+cc+3, 2, 8, 15,6, keystream[2]);
wolfSSL 0:1239e9b70ca2 121 step_Q(ctx, 512+cc+3, 512+cc+4, 3, 9, 0, 7, keystream[3]);
wolfSSL 0:1239e9b70ca2 122 step_Q(ctx, 512+cc+4, 512+cc+5, 4, 10,1, 8, keystream[4]);
wolfSSL 0:1239e9b70ca2 123 step_Q(ctx, 512+cc+5, 512+cc+6, 5, 11,2, 9, keystream[5]);
wolfSSL 0:1239e9b70ca2 124 step_Q(ctx, 512+cc+6, 512+cc+7, 6, 12,3, 10,keystream[6]);
wolfSSL 0:1239e9b70ca2 125 step_Q(ctx, 512+cc+7, 512+cc+8, 7, 13,4, 11,keystream[7]);
wolfSSL 0:1239e9b70ca2 126 step_Q(ctx, 512+cc+8, 512+cc+9, 8, 14,5, 12,keystream[8]);
wolfSSL 0:1239e9b70ca2 127 step_Q(ctx, 512+cc+9, 512+cc+10,9, 15,6, 13,keystream[9]);
wolfSSL 0:1239e9b70ca2 128 step_Q(ctx, 512+cc+10,512+cc+11,10,0, 7, 14,keystream[10]);
wolfSSL 0:1239e9b70ca2 129 step_Q(ctx, 512+cc+11,512+cc+12,11,1, 8, 15,keystream[11]);
wolfSSL 0:1239e9b70ca2 130 step_Q(ctx, 512+cc+12,512+cc+13,12,2, 9, 0, keystream[12]);
wolfSSL 0:1239e9b70ca2 131 step_Q(ctx, 512+cc+13,512+cc+14,13,3, 10,1, keystream[13]);
wolfSSL 0:1239e9b70ca2 132 step_Q(ctx, 512+cc+14,512+cc+15,14,4, 11,2, keystream[14]);
wolfSSL 0:1239e9b70ca2 133 step_Q(ctx, 512+cc+15,512+dd+0, 15,5, 12,3, keystream[15]);
wolfSSL 0:1239e9b70ca2 134 }
wolfSSL 0:1239e9b70ca2 135 }
wolfSSL 0:1239e9b70ca2 136
wolfSSL 0:1239e9b70ca2 137
wolfSSL 0:1239e9b70ca2 138 /* The following defines the initialization functions */
wolfSSL 0:1239e9b70ca2 139 #define f1(x) (rotrFixed((x),7) ^ rotrFixed((x),18) ^ ((x) >> 3))
wolfSSL 0:1239e9b70ca2 140 #define f2(x) (rotrFixed((x),17) ^ rotrFixed((x),19) ^ ((x) >> 10))
wolfSSL 0:1239e9b70ca2 141
wolfSSL 0:1239e9b70ca2 142 /*update table P*/
wolfSSL 0:1239e9b70ca2 143 #define update_P(ctx,u,v,a,b,c,d){ \
wolfSSL 0:1239e9b70ca2 144 word32 tem0,tem1,tem2,tem3; \
wolfSSL 0:1239e9b70ca2 145 tem0 = rotrFixed((ctx->T[(v)]),23); \
wolfSSL 0:1239e9b70ca2 146 tem1 = rotrFixed((ctx->X[(c)]),10); \
wolfSSL 0:1239e9b70ca2 147 tem2 = rotrFixed((ctx->X[(b)]),8); \
wolfSSL 0:1239e9b70ca2 148 h1((ctx),(ctx->X[(d)]),tem3); \
wolfSSL 0:1239e9b70ca2 149 (ctx->T[(u)]) = ((ctx->T[(u)]) + tem2+(tem0^tem1)) ^ tem3; \
wolfSSL 0:1239e9b70ca2 150 (ctx->X[(a)]) = (ctx->T[(u)]); \
wolfSSL 0:1239e9b70ca2 151 }
wolfSSL 0:1239e9b70ca2 152
wolfSSL 0:1239e9b70ca2 153 /*update table Q*/
wolfSSL 0:1239e9b70ca2 154 #define update_Q(ctx,u,v,a,b,c,d){ \
wolfSSL 0:1239e9b70ca2 155 word32 tem0,tem1,tem2,tem3; \
wolfSSL 0:1239e9b70ca2 156 tem0 = rotrFixed((ctx->T[(v)]),(32-23)); \
wolfSSL 0:1239e9b70ca2 157 tem1 = rotrFixed((ctx->Y[(c)]),(32-10)); \
wolfSSL 0:1239e9b70ca2 158 tem2 = rotrFixed((ctx->Y[(b)]),(32-8)); \
wolfSSL 0:1239e9b70ca2 159 h2((ctx),(ctx->Y[(d)]),tem3); \
wolfSSL 0:1239e9b70ca2 160 (ctx->T[(u)]) = ((ctx->T[(u)]) + tem2+(tem0^tem1)) ^ tem3; \
wolfSSL 0:1239e9b70ca2 161 (ctx->Y[(a)]) = (ctx->T[(u)]); \
wolfSSL 0:1239e9b70ca2 162 }
wolfSSL 0:1239e9b70ca2 163
wolfSSL 0:1239e9b70ca2 164 /*16 steps of HC-128, without generating keystream, */
wolfSSL 0:1239e9b70ca2 165 /*but use the outputs to update P and Q*/
wolfSSL 0:1239e9b70ca2 166 static void setup_update(HC128* ctx) /*each time 16 steps*/
wolfSSL 0:1239e9b70ca2 167 {
wolfSSL 0:1239e9b70ca2 168 word32 cc,dd;
wolfSSL 0:1239e9b70ca2 169 cc = ctx->counter1024 & 0x1ff;
wolfSSL 0:1239e9b70ca2 170 dd = (cc+16)&0x1ff;
wolfSSL 0:1239e9b70ca2 171
wolfSSL 0:1239e9b70ca2 172 if (ctx->counter1024 < 512)
wolfSSL 0:1239e9b70ca2 173 {
wolfSSL 0:1239e9b70ca2 174 ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
wolfSSL 0:1239e9b70ca2 175 update_P(ctx, cc+0, cc+1, 0, 6, 13, 4);
wolfSSL 0:1239e9b70ca2 176 update_P(ctx, cc+1, cc+2, 1, 7, 14, 5);
wolfSSL 0:1239e9b70ca2 177 update_P(ctx, cc+2, cc+3, 2, 8, 15, 6);
wolfSSL 0:1239e9b70ca2 178 update_P(ctx, cc+3, cc+4, 3, 9, 0, 7);
wolfSSL 0:1239e9b70ca2 179 update_P(ctx, cc+4, cc+5, 4, 10,1, 8);
wolfSSL 0:1239e9b70ca2 180 update_P(ctx, cc+5, cc+6, 5, 11,2, 9);
wolfSSL 0:1239e9b70ca2 181 update_P(ctx, cc+6, cc+7, 6, 12,3, 10);
wolfSSL 0:1239e9b70ca2 182 update_P(ctx, cc+7, cc+8, 7, 13,4, 11);
wolfSSL 0:1239e9b70ca2 183 update_P(ctx, cc+8, cc+9, 8, 14,5, 12);
wolfSSL 0:1239e9b70ca2 184 update_P(ctx, cc+9, cc+10,9, 15,6, 13);
wolfSSL 0:1239e9b70ca2 185 update_P(ctx, cc+10,cc+11,10,0, 7, 14);
wolfSSL 0:1239e9b70ca2 186 update_P(ctx, cc+11,cc+12,11,1, 8, 15);
wolfSSL 0:1239e9b70ca2 187 update_P(ctx, cc+12,cc+13,12,2, 9, 0);
wolfSSL 0:1239e9b70ca2 188 update_P(ctx, cc+13,cc+14,13,3, 10, 1);
wolfSSL 0:1239e9b70ca2 189 update_P(ctx, cc+14,cc+15,14,4, 11, 2);
wolfSSL 0:1239e9b70ca2 190 update_P(ctx, cc+15,dd+0, 15,5, 12, 3);
wolfSSL 0:1239e9b70ca2 191 }
wolfSSL 0:1239e9b70ca2 192 else
wolfSSL 0:1239e9b70ca2 193 {
wolfSSL 0:1239e9b70ca2 194 ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
wolfSSL 0:1239e9b70ca2 195 update_Q(ctx, 512+cc+0, 512+cc+1, 0, 6, 13, 4);
wolfSSL 0:1239e9b70ca2 196 update_Q(ctx, 512+cc+1, 512+cc+2, 1, 7, 14, 5);
wolfSSL 0:1239e9b70ca2 197 update_Q(ctx, 512+cc+2, 512+cc+3, 2, 8, 15, 6);
wolfSSL 0:1239e9b70ca2 198 update_Q(ctx, 512+cc+3, 512+cc+4, 3, 9, 0, 7);
wolfSSL 0:1239e9b70ca2 199 update_Q(ctx, 512+cc+4, 512+cc+5, 4, 10,1, 8);
wolfSSL 0:1239e9b70ca2 200 update_Q(ctx, 512+cc+5, 512+cc+6, 5, 11,2, 9);
wolfSSL 0:1239e9b70ca2 201 update_Q(ctx, 512+cc+6, 512+cc+7, 6, 12,3, 10);
wolfSSL 0:1239e9b70ca2 202 update_Q(ctx, 512+cc+7, 512+cc+8, 7, 13,4, 11);
wolfSSL 0:1239e9b70ca2 203 update_Q(ctx, 512+cc+8, 512+cc+9, 8, 14,5, 12);
wolfSSL 0:1239e9b70ca2 204 update_Q(ctx, 512+cc+9, 512+cc+10,9, 15,6, 13);
wolfSSL 0:1239e9b70ca2 205 update_Q(ctx, 512+cc+10,512+cc+11,10,0, 7, 14);
wolfSSL 0:1239e9b70ca2 206 update_Q(ctx, 512+cc+11,512+cc+12,11,1, 8, 15);
wolfSSL 0:1239e9b70ca2 207 update_Q(ctx, 512+cc+12,512+cc+13,12,2, 9, 0);
wolfSSL 0:1239e9b70ca2 208 update_Q(ctx, 512+cc+13,512+cc+14,13,3, 10, 1);
wolfSSL 0:1239e9b70ca2 209 update_Q(ctx, 512+cc+14,512+cc+15,14,4, 11, 2);
wolfSSL 0:1239e9b70ca2 210 update_Q(ctx, 512+cc+15,512+dd+0, 15,5, 12, 3);
wolfSSL 0:1239e9b70ca2 211 }
wolfSSL 0:1239e9b70ca2 212 }
wolfSSL 0:1239e9b70ca2 213
wolfSSL 0:1239e9b70ca2 214
wolfSSL 0:1239e9b70ca2 215 /* for the 128-bit key: key[0]...key[15]
wolfSSL 0:1239e9b70ca2 216 * key[0] is the least significant byte of ctx->key[0] (K_0);
wolfSSL 0:1239e9b70ca2 217 * key[3] is the most significant byte of ctx->key[0] (K_0);
wolfSSL 0:1239e9b70ca2 218 * ...
wolfSSL 0:1239e9b70ca2 219 * key[12] is the least significant byte of ctx->key[3] (K_3)
wolfSSL 0:1239e9b70ca2 220 * key[15] is the most significant byte of ctx->key[3] (K_3)
wolfSSL 0:1239e9b70ca2 221 *
wolfSSL 0:1239e9b70ca2 222 * for the 128-bit iv: iv[0]...iv[15]
wolfSSL 0:1239e9b70ca2 223 * iv[0] is the least significant byte of ctx->iv[0] (IV_0);
wolfSSL 0:1239e9b70ca2 224 * iv[3] is the most significant byte of ctx->iv[0] (IV_0);
wolfSSL 0:1239e9b70ca2 225 * ...
wolfSSL 0:1239e9b70ca2 226 * iv[12] is the least significant byte of ctx->iv[3] (IV_3)
wolfSSL 0:1239e9b70ca2 227 * iv[15] is the most significant byte of ctx->iv[3] (IV_3)
wolfSSL 0:1239e9b70ca2 228 */
wolfSSL 0:1239e9b70ca2 229
wolfSSL 0:1239e9b70ca2 230
wolfSSL 0:1239e9b70ca2 231
wolfSSL 0:1239e9b70ca2 232 static void Hc128_SetIV(HC128* ctx, const byte* inIv)
wolfSSL 0:1239e9b70ca2 233 {
wolfSSL 0:1239e9b70ca2 234 word32 i;
wolfSSL 0:1239e9b70ca2 235 word32 iv[4];
wolfSSL 0:1239e9b70ca2 236
wolfSSL 0:1239e9b70ca2 237 if (inIv)
wolfSSL 0:1239e9b70ca2 238 XMEMCPY(iv, inIv, sizeof(iv));
wolfSSL 0:1239e9b70ca2 239 else
wolfSSL 0:1239e9b70ca2 240 XMEMSET(iv, 0, sizeof(iv));
wolfSSL 0:1239e9b70ca2 241
wolfSSL 0:1239e9b70ca2 242 for (i = 0; i < (128 >> 5); i++)
wolfSSL 0:1239e9b70ca2 243 ctx->iv[i] = LITTLE32(iv[i]);
wolfSSL 0:1239e9b70ca2 244
wolfSSL 0:1239e9b70ca2 245 for (; i < 8; i++) ctx->iv[i] = ctx->iv[i-4];
wolfSSL 0:1239e9b70ca2 246
wolfSSL 0:1239e9b70ca2 247 /* expand the key and IV into the table T */
wolfSSL 0:1239e9b70ca2 248 /* (expand the key and IV into the table P and Q) */
wolfSSL 0:1239e9b70ca2 249
wolfSSL 0:1239e9b70ca2 250 for (i = 0; i < 8; i++) ctx->T[i] = ctx->key[i];
wolfSSL 0:1239e9b70ca2 251 for (i = 8; i < 16; i++) ctx->T[i] = ctx->iv[i-8];
wolfSSL 0:1239e9b70ca2 252
wolfSSL 0:1239e9b70ca2 253 for (i = 16; i < (256+16); i++)
wolfSSL 0:1239e9b70ca2 254 ctx->T[i] = f2(ctx->T[i-2]) + ctx->T[i-7] + f1(ctx->T[i-15]) +
wolfSSL 0:1239e9b70ca2 255 ctx->T[i-16]+i;
wolfSSL 0:1239e9b70ca2 256
wolfSSL 0:1239e9b70ca2 257 for (i = 0; i < 16; i++) ctx->T[i] = ctx->T[256+i];
wolfSSL 0:1239e9b70ca2 258
wolfSSL 0:1239e9b70ca2 259 for (i = 16; i < 1024; i++)
wolfSSL 0:1239e9b70ca2 260 ctx->T[i] = f2(ctx->T[i-2]) + ctx->T[i-7] + f1(ctx->T[i-15]) +
wolfSSL 0:1239e9b70ca2 261 ctx->T[i-16]+256+i;
wolfSSL 0:1239e9b70ca2 262
wolfSSL 0:1239e9b70ca2 263 /* initialize counter1024, X and Y */
wolfSSL 0:1239e9b70ca2 264 ctx->counter1024 = 0;
wolfSSL 0:1239e9b70ca2 265 for (i = 0; i < 16; i++) ctx->X[i] = ctx->T[512-16+i];
wolfSSL 0:1239e9b70ca2 266 for (i = 0; i < 16; i++) ctx->Y[i] = ctx->T[512+512-16+i];
wolfSSL 0:1239e9b70ca2 267
wolfSSL 0:1239e9b70ca2 268 /* run the cipher 1024 steps before generating the output */
wolfSSL 0:1239e9b70ca2 269 for (i = 0; i < 64; i++) setup_update(ctx);
wolfSSL 0:1239e9b70ca2 270 }
wolfSSL 0:1239e9b70ca2 271
wolfSSL 0:1239e9b70ca2 272
wolfSSL 0:1239e9b70ca2 273 static INLINE int DoKey(HC128* ctx, const byte* key, const byte* iv)
wolfSSL 0:1239e9b70ca2 274 {
wolfSSL 0:1239e9b70ca2 275 word32 i;
wolfSSL 0:1239e9b70ca2 276
wolfSSL 0:1239e9b70ca2 277 /* Key size in bits 128 */
wolfSSL 0:1239e9b70ca2 278 for (i = 0; i < (128 >> 5); i++)
wolfSSL 0:1239e9b70ca2 279 ctx->key[i] = LITTLE32(((word32*)key)[i]);
wolfSSL 0:1239e9b70ca2 280
wolfSSL 0:1239e9b70ca2 281 for ( ; i < 8 ; i++) ctx->key[i] = ctx->key[i-4];
wolfSSL 0:1239e9b70ca2 282
wolfSSL 0:1239e9b70ca2 283 Hc128_SetIV(ctx, iv);
wolfSSL 0:1239e9b70ca2 284
wolfSSL 0:1239e9b70ca2 285 return 0;
wolfSSL 0:1239e9b70ca2 286 }
wolfSSL 0:1239e9b70ca2 287
wolfSSL 0:1239e9b70ca2 288
wolfSSL 0:1239e9b70ca2 289 /* Key setup */
wolfSSL 0:1239e9b70ca2 290 int Hc128_SetKey(HC128* ctx, const byte* key, const byte* iv)
wolfSSL 0:1239e9b70ca2 291 {
wolfSSL 0:1239e9b70ca2 292 #ifdef XSTREAM_ALIGN
wolfSSL 0:1239e9b70ca2 293 if ((word)key % 4) {
wolfSSL 0:1239e9b70ca2 294 int alignKey[4];
wolfSSL 0:1239e9b70ca2 295
wolfSSL 0:1239e9b70ca2 296 /* iv gets aligned in SetIV */
wolfSSL 0:1239e9b70ca2 297 CYASSL_MSG("Hc128SetKey unaligned key");
wolfSSL 0:1239e9b70ca2 298
wolfSSL 0:1239e9b70ca2 299 XMEMCPY(alignKey, key, sizeof(alignKey));
wolfSSL 0:1239e9b70ca2 300
wolfSSL 0:1239e9b70ca2 301 return DoKey(ctx, (const byte*)alignKey, iv);
wolfSSL 0:1239e9b70ca2 302 }
wolfSSL 0:1239e9b70ca2 303 #endif /* XSTREAM_ALIGN */
wolfSSL 0:1239e9b70ca2 304
wolfSSL 0:1239e9b70ca2 305 return DoKey(ctx, key, iv);
wolfSSL 0:1239e9b70ca2 306 }
wolfSSL 0:1239e9b70ca2 307
wolfSSL 0:1239e9b70ca2 308
wolfSSL 0:1239e9b70ca2 309
wolfSSL 0:1239e9b70ca2 310 /* The following defines the encryption of data stream */
wolfSSL 0:1239e9b70ca2 311 static INLINE int DoProcess(HC128* ctx, byte* output, const byte* input,
wolfSSL 0:1239e9b70ca2 312 word32 msglen)
wolfSSL 0:1239e9b70ca2 313 {
wolfSSL 0:1239e9b70ca2 314 word32 i, keystream[16];
wolfSSL 0:1239e9b70ca2 315
wolfSSL 0:1239e9b70ca2 316 for ( ; msglen >= 64; msglen -= 64, input += 64, output += 64)
wolfSSL 0:1239e9b70ca2 317 {
wolfSSL 0:1239e9b70ca2 318 generate_keystream(ctx, keystream);
wolfSSL 0:1239e9b70ca2 319
wolfSSL 0:1239e9b70ca2 320 /* unroll loop */
wolfSSL 0:1239e9b70ca2 321 ((word32*)output)[0] = ((word32*)input)[0] ^ LITTLE32(keystream[0]);
wolfSSL 0:1239e9b70ca2 322 ((word32*)output)[1] = ((word32*)input)[1] ^ LITTLE32(keystream[1]);
wolfSSL 0:1239e9b70ca2 323 ((word32*)output)[2] = ((word32*)input)[2] ^ LITTLE32(keystream[2]);
wolfSSL 0:1239e9b70ca2 324 ((word32*)output)[3] = ((word32*)input)[3] ^ LITTLE32(keystream[3]);
wolfSSL 0:1239e9b70ca2 325 ((word32*)output)[4] = ((word32*)input)[4] ^ LITTLE32(keystream[4]);
wolfSSL 0:1239e9b70ca2 326 ((word32*)output)[5] = ((word32*)input)[5] ^ LITTLE32(keystream[5]);
wolfSSL 0:1239e9b70ca2 327 ((word32*)output)[6] = ((word32*)input)[6] ^ LITTLE32(keystream[6]);
wolfSSL 0:1239e9b70ca2 328 ((word32*)output)[7] = ((word32*)input)[7] ^ LITTLE32(keystream[7]);
wolfSSL 0:1239e9b70ca2 329 ((word32*)output)[8] = ((word32*)input)[8] ^ LITTLE32(keystream[8]);
wolfSSL 0:1239e9b70ca2 330 ((word32*)output)[9] = ((word32*)input)[9] ^ LITTLE32(keystream[9]);
wolfSSL 0:1239e9b70ca2 331 ((word32*)output)[10] = ((word32*)input)[10] ^ LITTLE32(keystream[10]);
wolfSSL 0:1239e9b70ca2 332 ((word32*)output)[11] = ((word32*)input)[11] ^ LITTLE32(keystream[11]);
wolfSSL 0:1239e9b70ca2 333 ((word32*)output)[12] = ((word32*)input)[12] ^ LITTLE32(keystream[12]);
wolfSSL 0:1239e9b70ca2 334 ((word32*)output)[13] = ((word32*)input)[13] ^ LITTLE32(keystream[13]);
wolfSSL 0:1239e9b70ca2 335 ((word32*)output)[14] = ((word32*)input)[14] ^ LITTLE32(keystream[14]);
wolfSSL 0:1239e9b70ca2 336 ((word32*)output)[15] = ((word32*)input)[15] ^ LITTLE32(keystream[15]);
wolfSSL 0:1239e9b70ca2 337 }
wolfSSL 0:1239e9b70ca2 338
wolfSSL 0:1239e9b70ca2 339 if (msglen > 0)
wolfSSL 0:1239e9b70ca2 340 {
wolfSSL 0:1239e9b70ca2 341 XMEMSET(keystream, 0, sizeof(keystream)); /* hush the static analysis */
wolfSSL 0:1239e9b70ca2 342 generate_keystream(ctx, keystream);
wolfSSL 0:1239e9b70ca2 343
wolfSSL 0:1239e9b70ca2 344 #ifdef BIG_ENDIAN_ORDER
wolfSSL 0:1239e9b70ca2 345 {
wolfSSL 0:1239e9b70ca2 346 word32 wordsLeft = msglen / sizeof(word32);
wolfSSL 0:1239e9b70ca2 347 if (msglen % sizeof(word32)) wordsLeft++;
wolfSSL 0:1239e9b70ca2 348
wolfSSL 0:1239e9b70ca2 349 ByteReverseWords(keystream, keystream, wordsLeft * sizeof(word32));
wolfSSL 0:1239e9b70ca2 350 }
wolfSSL 0:1239e9b70ca2 351 #endif
wolfSSL 0:1239e9b70ca2 352
wolfSSL 0:1239e9b70ca2 353 for (i = 0; i < msglen; i++)
wolfSSL 0:1239e9b70ca2 354 output[i] = input[i] ^ ((byte*)keystream)[i];
wolfSSL 0:1239e9b70ca2 355 }
wolfSSL 0:1239e9b70ca2 356
wolfSSL 0:1239e9b70ca2 357 return 0;
wolfSSL 0:1239e9b70ca2 358 }
wolfSSL 0:1239e9b70ca2 359
wolfSSL 0:1239e9b70ca2 360
wolfSSL 0:1239e9b70ca2 361 /* Encrypt/decrypt a message of any size */
wolfSSL 0:1239e9b70ca2 362 int Hc128_Process(HC128* ctx, byte* output, const byte* input, word32 msglen)
wolfSSL 0:1239e9b70ca2 363 {
wolfSSL 0:1239e9b70ca2 364 #ifdef XSTREAM_ALIGN
wolfSSL 0:1239e9b70ca2 365 if ((word)input % 4 || (word)output % 4) {
wolfSSL 0:1239e9b70ca2 366 #ifndef NO_CYASSL_ALLOC_ALIGN
wolfSSL 0:1239e9b70ca2 367 byte* tmp;
wolfSSL 0:1239e9b70ca2 368 CYASSL_MSG("Hc128Process unaligned");
wolfSSL 0:1239e9b70ca2 369
wolfSSL 0:1239e9b70ca2 370 tmp = (byte*)XMALLOC(msglen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 0:1239e9b70ca2 371 if (tmp == NULL) return MEMORY_E;
wolfSSL 0:1239e9b70ca2 372
wolfSSL 0:1239e9b70ca2 373 XMEMCPY(tmp, input, msglen);
wolfSSL 0:1239e9b70ca2 374 DoProcess(ctx, tmp, tmp, msglen);
wolfSSL 0:1239e9b70ca2 375 XMEMCPY(output, tmp, msglen);
wolfSSL 0:1239e9b70ca2 376
wolfSSL 0:1239e9b70ca2 377 XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
wolfSSL 0:1239e9b70ca2 378
wolfSSL 0:1239e9b70ca2 379 return 0;
wolfSSL 0:1239e9b70ca2 380 #else
wolfSSL 0:1239e9b70ca2 381 return BAD_ALIGN_E;
wolfSSL 0:1239e9b70ca2 382 #endif
wolfSSL 0:1239e9b70ca2 383 }
wolfSSL 0:1239e9b70ca2 384 #endif /* XSTREAM_ALIGN */
wolfSSL 0:1239e9b70ca2 385
wolfSSL 0:1239e9b70ca2 386 return DoProcess(ctx, output, input, msglen);
wolfSSL 0:1239e9b70ca2 387 }
wolfSSL 0:1239e9b70ca2 388
wolfSSL 0:1239e9b70ca2 389
wolfSSL 0:1239e9b70ca2 390 #else /* HAVE_HC128 */
wolfSSL 0:1239e9b70ca2 391
wolfSSL 0:1239e9b70ca2 392
wolfSSL 0:1239e9b70ca2 393 #ifdef _MSC_VER
wolfSSL 0:1239e9b70ca2 394 /* 4206 warning for blank file */
wolfSSL 0:1239e9b70ca2 395 #pragma warning(disable: 4206)
wolfSSL 0:1239e9b70ca2 396 #endif
wolfSSL 0:1239e9b70ca2 397
wolfSSL 0:1239e9b70ca2 398
wolfSSL 0:1239e9b70ca2 399 #endif /* HAVE_HC128 */
wolfSSL 0:1239e9b70ca2 400