+++ /dev/null
-/* hc128.c
- *
- * Copyright (C) 2006-2014 wolfSSL Inc.
- *
- * This file is part of CyaSSL.
- *
- * CyaSSL is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * CyaSSL is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#ifdef HAVE_CONFIG_H
- #include <config.h>
-#endif
-
-#include <cyassl/ctaocrypt/settings.h>
-
-#ifdef HAVE_HC128
-
-#include <cyassl/ctaocrypt/hc128.h>
-#include <cyassl/ctaocrypt/error-crypt.h>
-#include <cyassl/ctaocrypt/logging.h>
-#ifdef NO_INLINE
- #include <cyassl/ctaocrypt/hc128.h>
- #include <cyassl/ctaocrypt/misc.h>
-#else
- #include <ctaocrypt/src/misc.c>
-#endif
-
-
-#ifdef BIG_ENDIAN_ORDER
- #define LITTLE32(x) ByteReverseWord32(x)
-#else
- #define LITTLE32(x) (x)
-#endif
-
-
-/*h1 function*/
-#define h1(ctx, x, y) { \
- byte a,c; \
- a = (byte) (x); \
- c = (byte) ((x) >> 16); \
- y = (ctx->T[512+a])+(ctx->T[512+256+c]); \
-}
-
-/*h2 function*/
-#define h2(ctx, x, y) { \
- byte a,c; \
- a = (byte) (x); \
- c = (byte) ((x) >> 16); \
- y = (ctx->T[a])+(ctx->T[256+c]); \
-}
-
-/*one step of HC-128, update P and generate 32 bits keystream*/
-#define step_P(ctx,u,v,a,b,c,d,n){ \
- word32 tem0,tem1,tem2,tem3; \
- h1((ctx),(ctx->X[(d)]),tem3); \
- tem0 = rotrFixed((ctx->T[(v)]),23); \
- tem1 = rotrFixed((ctx->X[(c)]),10); \
- tem2 = rotrFixed((ctx->X[(b)]),8); \
- (ctx->T[(u)]) += tem2+(tem0 ^ tem1); \
- (ctx->X[(a)]) = (ctx->T[(u)]); \
- (n) = tem3 ^ (ctx->T[(u)]) ; \
-}
-
-/*one step of HC-128, update Q and generate 32 bits keystream*/
-#define step_Q(ctx,u,v,a,b,c,d,n){ \
- word32 tem0,tem1,tem2,tem3; \
- h2((ctx),(ctx->Y[(d)]),tem3); \
- tem0 = rotrFixed((ctx->T[(v)]),(32-23)); \
- tem1 = rotrFixed((ctx->Y[(c)]),(32-10)); \
- tem2 = rotrFixed((ctx->Y[(b)]),(32-8)); \
- (ctx->T[(u)]) += tem2 + (tem0 ^ tem1); \
- (ctx->Y[(a)]) = (ctx->T[(u)]); \
- (n) = tem3 ^ (ctx->T[(u)]) ; \
-}
-
-/*16 steps of HC-128, generate 512 bits keystream*/
-static void generate_keystream(HC128* ctx, word32* keystream)
-{
- word32 cc,dd;
- cc = ctx->counter1024 & 0x1ff;
- dd = (cc+16)&0x1ff;
-
- if (ctx->counter1024 < 512)
- {
- ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
- step_P(ctx, cc+0, cc+1, 0, 6, 13,4, keystream[0]);
- step_P(ctx, cc+1, cc+2, 1, 7, 14,5, keystream[1]);
- step_P(ctx, cc+2, cc+3, 2, 8, 15,6, keystream[2]);
- step_P(ctx, cc+3, cc+4, 3, 9, 0, 7, keystream[3]);
- step_P(ctx, cc+4, cc+5, 4, 10,1, 8, keystream[4]);
- step_P(ctx, cc+5, cc+6, 5, 11,2, 9, keystream[5]);
- step_P(ctx, cc+6, cc+7, 6, 12,3, 10,keystream[6]);
- step_P(ctx, cc+7, cc+8, 7, 13,4, 11,keystream[7]);
- step_P(ctx, cc+8, cc+9, 8, 14,5, 12,keystream[8]);
- step_P(ctx, cc+9, cc+10,9, 15,6, 13,keystream[9]);
- step_P(ctx, cc+10,cc+11,10,0, 7, 14,keystream[10]);
- step_P(ctx, cc+11,cc+12,11,1, 8, 15,keystream[11]);
- step_P(ctx, cc+12,cc+13,12,2, 9, 0, keystream[12]);
- step_P(ctx, cc+13,cc+14,13,3, 10,1, keystream[13]);
- step_P(ctx, cc+14,cc+15,14,4, 11,2, keystream[14]);
- step_P(ctx, cc+15,dd+0, 15,5, 12,3, keystream[15]);
- }
- else
- {
- ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
- step_Q(ctx, 512+cc+0, 512+cc+1, 0, 6, 13,4, keystream[0]);
- step_Q(ctx, 512+cc+1, 512+cc+2, 1, 7, 14,5, keystream[1]);
- step_Q(ctx, 512+cc+2, 512+cc+3, 2, 8, 15,6, keystream[2]);
- step_Q(ctx, 512+cc+3, 512+cc+4, 3, 9, 0, 7, keystream[3]);
- step_Q(ctx, 512+cc+4, 512+cc+5, 4, 10,1, 8, keystream[4]);
- step_Q(ctx, 512+cc+5, 512+cc+6, 5, 11,2, 9, keystream[5]);
- step_Q(ctx, 512+cc+6, 512+cc+7, 6, 12,3, 10,keystream[6]);
- step_Q(ctx, 512+cc+7, 512+cc+8, 7, 13,4, 11,keystream[7]);
- step_Q(ctx, 512+cc+8, 512+cc+9, 8, 14,5, 12,keystream[8]);
- step_Q(ctx, 512+cc+9, 512+cc+10,9, 15,6, 13,keystream[9]);
- step_Q(ctx, 512+cc+10,512+cc+11,10,0, 7, 14,keystream[10]);
- step_Q(ctx, 512+cc+11,512+cc+12,11,1, 8, 15,keystream[11]);
- step_Q(ctx, 512+cc+12,512+cc+13,12,2, 9, 0, keystream[12]);
- step_Q(ctx, 512+cc+13,512+cc+14,13,3, 10,1, keystream[13]);
- step_Q(ctx, 512+cc+14,512+cc+15,14,4, 11,2, keystream[14]);
- step_Q(ctx, 512+cc+15,512+dd+0, 15,5, 12,3, keystream[15]);
- }
-}
-
-
-/* The following defines the initialization functions */
-#define f1(x) (rotrFixed((x),7) ^ rotrFixed((x),18) ^ ((x) >> 3))
-#define f2(x) (rotrFixed((x),17) ^ rotrFixed((x),19) ^ ((x) >> 10))
-
-/*update table P*/
-#define update_P(ctx,u,v,a,b,c,d){ \
- word32 tem0,tem1,tem2,tem3; \
- tem0 = rotrFixed((ctx->T[(v)]),23); \
- tem1 = rotrFixed((ctx->X[(c)]),10); \
- tem2 = rotrFixed((ctx->X[(b)]),8); \
- h1((ctx),(ctx->X[(d)]),tem3); \
- (ctx->T[(u)]) = ((ctx->T[(u)]) + tem2+(tem0^tem1)) ^ tem3; \
- (ctx->X[(a)]) = (ctx->T[(u)]); \
-}
-
-/*update table Q*/
-#define update_Q(ctx,u,v,a,b,c,d){ \
- word32 tem0,tem1,tem2,tem3; \
- tem0 = rotrFixed((ctx->T[(v)]),(32-23)); \
- tem1 = rotrFixed((ctx->Y[(c)]),(32-10)); \
- tem2 = rotrFixed((ctx->Y[(b)]),(32-8)); \
- h2((ctx),(ctx->Y[(d)]),tem3); \
- (ctx->T[(u)]) = ((ctx->T[(u)]) + tem2+(tem0^tem1)) ^ tem3; \
- (ctx->Y[(a)]) = (ctx->T[(u)]); \
-}
-
-/*16 steps of HC-128, without generating keystream, */
-/*but use the outputs to update P and Q*/
-static void setup_update(HC128* ctx) /*each time 16 steps*/
-{
- word32 cc,dd;
- cc = ctx->counter1024 & 0x1ff;
- dd = (cc+16)&0x1ff;
-
- if (ctx->counter1024 < 512)
- {
- ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
- update_P(ctx, cc+0, cc+1, 0, 6, 13, 4);
- update_P(ctx, cc+1, cc+2, 1, 7, 14, 5);
- update_P(ctx, cc+2, cc+3, 2, 8, 15, 6);
- update_P(ctx, cc+3, cc+4, 3, 9, 0, 7);
- update_P(ctx, cc+4, cc+5, 4, 10,1, 8);
- update_P(ctx, cc+5, cc+6, 5, 11,2, 9);
- update_P(ctx, cc+6, cc+7, 6, 12,3, 10);
- update_P(ctx, cc+7, cc+8, 7, 13,4, 11);
- update_P(ctx, cc+8, cc+9, 8, 14,5, 12);
- update_P(ctx, cc+9, cc+10,9, 15,6, 13);
- update_P(ctx, cc+10,cc+11,10,0, 7, 14);
- update_P(ctx, cc+11,cc+12,11,1, 8, 15);
- update_P(ctx, cc+12,cc+13,12,2, 9, 0);
- update_P(ctx, cc+13,cc+14,13,3, 10, 1);
- update_P(ctx, cc+14,cc+15,14,4, 11, 2);
- update_P(ctx, cc+15,dd+0, 15,5, 12, 3);
- }
- else
- {
- ctx->counter1024 = (ctx->counter1024 + 16) & 0x3ff;
- update_Q(ctx, 512+cc+0, 512+cc+1, 0, 6, 13, 4);
- update_Q(ctx, 512+cc+1, 512+cc+2, 1, 7, 14, 5);
- update_Q(ctx, 512+cc+2, 512+cc+3, 2, 8, 15, 6);
- update_Q(ctx, 512+cc+3, 512+cc+4, 3, 9, 0, 7);
- update_Q(ctx, 512+cc+4, 512+cc+5, 4, 10,1, 8);
- update_Q(ctx, 512+cc+5, 512+cc+6, 5, 11,2, 9);
- update_Q(ctx, 512+cc+6, 512+cc+7, 6, 12,3, 10);
- update_Q(ctx, 512+cc+7, 512+cc+8, 7, 13,4, 11);
- update_Q(ctx, 512+cc+8, 512+cc+9, 8, 14,5, 12);
- update_Q(ctx, 512+cc+9, 512+cc+10,9, 15,6, 13);
- update_Q(ctx, 512+cc+10,512+cc+11,10,0, 7, 14);
- update_Q(ctx, 512+cc+11,512+cc+12,11,1, 8, 15);
- update_Q(ctx, 512+cc+12,512+cc+13,12,2, 9, 0);
- update_Q(ctx, 512+cc+13,512+cc+14,13,3, 10, 1);
- update_Q(ctx, 512+cc+14,512+cc+15,14,4, 11, 2);
- update_Q(ctx, 512+cc+15,512+dd+0, 15,5, 12, 3);
- }
-}
-
-
-/* for the 128-bit key: key[0]...key[15]
-* key[0] is the least significant byte of ctx->key[0] (K_0);
-* key[3] is the most significant byte of ctx->key[0] (K_0);
-* ...
-* key[12] is the least significant byte of ctx->key[3] (K_3)
-* key[15] is the most significant byte of ctx->key[3] (K_3)
-*
-* for the 128-bit iv: iv[0]...iv[15]
-* iv[0] is the least significant byte of ctx->iv[0] (IV_0);
-* iv[3] is the most significant byte of ctx->iv[0] (IV_0);
-* ...
-* iv[12] is the least significant byte of ctx->iv[3] (IV_3)
-* iv[15] is the most significant byte of ctx->iv[3] (IV_3)
-*/
-
-
-
-static void Hc128_SetIV(HC128* ctx, const byte* inIv)
-{
- word32 i;
- word32 iv[4];
-
- if (inIv)
- XMEMCPY(iv, inIv, sizeof(iv));
- else
- XMEMSET(iv, 0, sizeof(iv));
-
- for (i = 0; i < (128 >> 5); i++)
- ctx->iv[i] = LITTLE32(iv[i]);
-
- for (; i < 8; i++) ctx->iv[i] = ctx->iv[i-4];
-
- /* expand the key and IV into the table T */
- /* (expand the key and IV into the table P and Q) */
-
- for (i = 0; i < 8; i++) ctx->T[i] = ctx->key[i];
- for (i = 8; i < 16; i++) ctx->T[i] = ctx->iv[i-8];
-
- for (i = 16; i < (256+16); i++)
- ctx->T[i] = f2(ctx->T[i-2]) + ctx->T[i-7] + f1(ctx->T[i-15]) +
- ctx->T[i-16]+i;
-
- for (i = 0; i < 16; i++) ctx->T[i] = ctx->T[256+i];
-
- for (i = 16; i < 1024; i++)
- ctx->T[i] = f2(ctx->T[i-2]) + ctx->T[i-7] + f1(ctx->T[i-15]) +
- ctx->T[i-16]+256+i;
-
- /* initialize counter1024, X and Y */
- ctx->counter1024 = 0;
- for (i = 0; i < 16; i++) ctx->X[i] = ctx->T[512-16+i];
- for (i = 0; i < 16; i++) ctx->Y[i] = ctx->T[512+512-16+i];
-
- /* run the cipher 1024 steps before generating the output */
- for (i = 0; i < 64; i++) setup_update(ctx);
-}
-
-
-static INLINE int DoKey(HC128* ctx, const byte* key, const byte* iv)
-{
- word32 i;
-
- /* Key size in bits 128 */
- for (i = 0; i < (128 >> 5); i++)
- ctx->key[i] = LITTLE32(((word32*)key)[i]);
-
- for ( ; i < 8 ; i++) ctx->key[i] = ctx->key[i-4];
-
- Hc128_SetIV(ctx, iv);
-
- return 0;
-}
-
-
-/* Key setup */
-int Hc128_SetKey(HC128* ctx, const byte* key, const byte* iv)
-{
-#ifdef XSTREAM_ALIGN
- if ((word)key % 4) {
- int alignKey[4];
-
- /* iv gets aligned in SetIV */
- CYASSL_MSG("Hc128SetKey unaligned key");
-
- XMEMCPY(alignKey, key, sizeof(alignKey));
-
- return DoKey(ctx, (const byte*)alignKey, iv);
- }
-#endif /* XSTREAM_ALIGN */
-
- return DoKey(ctx, key, iv);
-}
-
-
-
-/* The following defines the encryption of data stream */
-static INLINE int DoProcess(HC128* ctx, byte* output, const byte* input,
- word32 msglen)
-{
- word32 i, keystream[16];
-
- for ( ; msglen >= 64; msglen -= 64, input += 64, output += 64)
- {
- generate_keystream(ctx, keystream);
-
- /* unroll loop */
- ((word32*)output)[0] = ((word32*)input)[0] ^ LITTLE32(keystream[0]);
- ((word32*)output)[1] = ((word32*)input)[1] ^ LITTLE32(keystream[1]);
- ((word32*)output)[2] = ((word32*)input)[2] ^ LITTLE32(keystream[2]);
- ((word32*)output)[3] = ((word32*)input)[3] ^ LITTLE32(keystream[3]);
- ((word32*)output)[4] = ((word32*)input)[4] ^ LITTLE32(keystream[4]);
- ((word32*)output)[5] = ((word32*)input)[5] ^ LITTLE32(keystream[5]);
- ((word32*)output)[6] = ((word32*)input)[6] ^ LITTLE32(keystream[6]);
- ((word32*)output)[7] = ((word32*)input)[7] ^ LITTLE32(keystream[7]);
- ((word32*)output)[8] = ((word32*)input)[8] ^ LITTLE32(keystream[8]);
- ((word32*)output)[9] = ((word32*)input)[9] ^ LITTLE32(keystream[9]);
- ((word32*)output)[10] = ((word32*)input)[10] ^ LITTLE32(keystream[10]);
- ((word32*)output)[11] = ((word32*)input)[11] ^ LITTLE32(keystream[11]);
- ((word32*)output)[12] = ((word32*)input)[12] ^ LITTLE32(keystream[12]);
- ((word32*)output)[13] = ((word32*)input)[13] ^ LITTLE32(keystream[13]);
- ((word32*)output)[14] = ((word32*)input)[14] ^ LITTLE32(keystream[14]);
- ((word32*)output)[15] = ((word32*)input)[15] ^ LITTLE32(keystream[15]);
- }
-
- if (msglen > 0)
- {
- XMEMSET(keystream, 0, sizeof(keystream)); /* hush the static analysis */
- generate_keystream(ctx, keystream);
-
-#ifdef BIG_ENDIAN_ORDER
- {
- word32 wordsLeft = msglen / sizeof(word32);
- if (msglen % sizeof(word32)) wordsLeft++;
-
- ByteReverseWords(keystream, keystream, wordsLeft * sizeof(word32));
- }
-#endif
-
- for (i = 0; i < msglen; i++)
- output[i] = input[i] ^ ((byte*)keystream)[i];
- }
-
- return 0;
-}
-
-
-/* Encrypt/decrypt a message of any size */
-int Hc128_Process(HC128* ctx, byte* output, const byte* input, word32 msglen)
-{
-#ifdef XSTREAM_ALIGN
- if ((word)input % 4 || (word)output % 4) {
- #ifndef NO_CYASSL_ALLOC_ALIGN
- byte* tmp;
- CYASSL_MSG("Hc128Process unaligned");
-
- tmp = (byte*)XMALLOC(msglen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- if (tmp == NULL) return MEMORY_E;
-
- XMEMCPY(tmp, input, msglen);
- DoProcess(ctx, tmp, tmp, msglen);
- XMEMCPY(output, tmp, msglen);
-
- XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
-
- return 0;
- #else
- return BAD_ALIGN_E;
- #endif
- }
-#endif /* XSTREAM_ALIGN */
-
- return DoProcess(ctx, output, input, msglen);
-}
-
-
-#else /* HAVE_HC128 */
-
-
-#ifdef _MSC_VER
- /* 4206 warning for blank file */
- #pragma warning(disable: 4206)
-#endif
-
-
-#endif /* HAVE_HC128 */
projects / freertos / blobdiff