Diff: wolfcrypt/src/rabbit.c

Revision:

17:ff9d1e86ad5f

Parent:

16:048e5e270a58

--- a/wolfcrypt/src/rabbit.c	Tue Nov 19 14:32:16 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,343 +0,0 @@
-/* rabbit.c
- *
- * Copyright (C) 2006-2017 wolfSSL Inc.
- *
- * This file is part of wolfSSL.
- *
- * wolfSSL 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.
- *
- * wolfSSL 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 02110-1335, USA
- */
-
-
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
-#include <wolfssl/wolfcrypt/settings.h>
-
-#ifndef NO_RABBIT
-
-#include <wolfssl/wolfcrypt/rabbit.h>
-#include <wolfssl/wolfcrypt/error-crypt.h>
-#include <wolfssl/wolfcrypt/logging.h>
-#ifdef NO_INLINE
-    #include <wolfssl/wolfcrypt/misc.h>
-#else
-    #define WOLFSSL_MISC_INCLUDED
-    #include <wolfcrypt/src/misc.c>
-#endif
-
-
-#ifdef BIG_ENDIAN_ORDER
-    #define LITTLE32(x) ByteReverseWord32(x)
-#else
-    #define LITTLE32(x) (x)
-#endif
-
-#define U32V(x) ((word32)(x) & 0xFFFFFFFFU)
-
-
-/* Square a 32-bit unsigned integer to obtain the 64-bit result and return */
-/* the upper 32 bits XOR the lower 32 bits */
-static word32 RABBIT_g_func(word32 x)
-{
-    /* Temporary variables */
-    word32 a, b, h, l;
-
-    /* Construct high and low argument for squaring */
-    a = x&0xFFFF;
-    b = x>>16;
-
-    /* Calculate high and low result of squaring */
-    h = (((U32V(a*a)>>17) + U32V(a*b))>>15) + b*b;
-    l = x*x;
-
-    /* Return high XOR low */
-    return U32V(h^l);
-}
-
-
-/* Calculate the next internal state */
-static void RABBIT_next_state(RabbitCtx* ctx)
-{
-    /* Temporary variables */
-    word32 g[8], c_old[8], i;
-
-    /* Save old counter values */
-    for (i=0; i<8; i++)
-        c_old[i] = ctx->c[i];
-
-    /* Calculate new counter values */
-    ctx->c[0] = U32V(ctx->c[0] + 0x4D34D34D + ctx->carry);
-    ctx->c[1] = U32V(ctx->c[1] + 0xD34D34D3 + (ctx->c[0] < c_old[0]));
-    ctx->c[2] = U32V(ctx->c[2] + 0x34D34D34 + (ctx->c[1] < c_old[1]));
-    ctx->c[3] = U32V(ctx->c[3] + 0x4D34D34D + (ctx->c[2] < c_old[2]));
-    ctx->c[4] = U32V(ctx->c[4] + 0xD34D34D3 + (ctx->c[3] < c_old[3]));
-    ctx->c[5] = U32V(ctx->c[5] + 0x34D34D34 + (ctx->c[4] < c_old[4]));
-    ctx->c[6] = U32V(ctx->c[6] + 0x4D34D34D + (ctx->c[5] < c_old[5]));
-    ctx->c[7] = U32V(ctx->c[7] + 0xD34D34D3 + (ctx->c[6] < c_old[6]));
-    ctx->carry = (ctx->c[7] < c_old[7]);
-
-    /* Calculate the g-values */
-    for (i=0;i<8;i++)
-        g[i] = RABBIT_g_func(U32V(ctx->x[i] + ctx->c[i]));
-
-    /* Calculate new state values */
-    ctx->x[0] = U32V(g[0] + rotlFixed(g[7],16) + rotlFixed(g[6], 16));
-    ctx->x[1] = U32V(g[1] + rotlFixed(g[0], 8) + g[7]);
-    ctx->x[2] = U32V(g[2] + rotlFixed(g[1],16) + rotlFixed(g[0], 16));
-    ctx->x[3] = U32V(g[3] + rotlFixed(g[2], 8) + g[1]);
-    ctx->x[4] = U32V(g[4] + rotlFixed(g[3],16) + rotlFixed(g[2], 16));
-    ctx->x[5] = U32V(g[5] + rotlFixed(g[4], 8) + g[3]);
-    ctx->x[6] = U32V(g[6] + rotlFixed(g[5],16) + rotlFixed(g[4], 16));
-    ctx->x[7] = U32V(g[7] + rotlFixed(g[6], 8) + g[5]);
-}
-
-
-/* IV setup */
-static void wc_RabbitSetIV(Rabbit* ctx, const byte* inIv)
-{
-    /* Temporary variables */
-    word32 i0, i1, i2, i3, i;
-    word32 iv[2];
-
-    if (inIv)
-        XMEMCPY(iv, inIv, sizeof(iv));
-    else
-        XMEMSET(iv,    0, sizeof(iv));
-
-    /* Generate four subvectors */
-    i0 = LITTLE32(iv[0]);
-    i2 = LITTLE32(iv[1]);
-    i1 = (i0>>16) | (i2&0xFFFF0000);
-    i3 = (i2<<16) | (i0&0x0000FFFF);
-
-    /* Modify counter values */
-    ctx->workCtx.c[0] = ctx->masterCtx.c[0] ^ i0;
-    ctx->workCtx.c[1] = ctx->masterCtx.c[1] ^ i1;
-    ctx->workCtx.c[2] = ctx->masterCtx.c[2] ^ i2;
-    ctx->workCtx.c[3] = ctx->masterCtx.c[3] ^ i3;
-    ctx->workCtx.c[4] = ctx->masterCtx.c[4] ^ i0;
-    ctx->workCtx.c[5] = ctx->masterCtx.c[5] ^ i1;
-    ctx->workCtx.c[6] = ctx->masterCtx.c[6] ^ i2;
-    ctx->workCtx.c[7] = ctx->masterCtx.c[7] ^ i3;
-
-    /* Copy state variables */
-    for (i=0; i<8; i++)
-        ctx->workCtx.x[i] = ctx->masterCtx.x[i];
-    ctx->workCtx.carry = ctx->masterCtx.carry;
-
-    /* Iterate the system four times */
-    for (i=0; i<4; i++)
-        RABBIT_next_state(&(ctx->workCtx));
-}
-
-
-/* Key setup */
-static WC_INLINE int DoKey(Rabbit* ctx, const byte* key, const byte* iv)
-{
-    /* Temporary variables */
-    word32 k0, k1, k2, k3, i;
-
-    /* Generate four subkeys */
-    k0 = LITTLE32(*(word32*)(key+ 0));
-    k1 = LITTLE32(*(word32*)(key+ 4));
-    k2 = LITTLE32(*(word32*)(key+ 8));
-    k3 = LITTLE32(*(word32*)(key+12));
-
-    /* Generate initial state variables */
-    ctx->masterCtx.x[0] = k0;
-    ctx->masterCtx.x[2] = k1;
-    ctx->masterCtx.x[4] = k2;
-    ctx->masterCtx.x[6] = k3;
-    ctx->masterCtx.x[1] = U32V(k3<<16) | (k2>>16);
-    ctx->masterCtx.x[3] = U32V(k0<<16) | (k3>>16);
-    ctx->masterCtx.x[5] = U32V(k1<<16) | (k0>>16);
-    ctx->masterCtx.x[7] = U32V(k2<<16) | (k1>>16);
-
-    /* Generate initial counter values */
-    ctx->masterCtx.c[0] = rotlFixed(k2, 16);
-    ctx->masterCtx.c[2] = rotlFixed(k3, 16);
-    ctx->masterCtx.c[4] = rotlFixed(k0, 16);
-    ctx->masterCtx.c[6] = rotlFixed(k1, 16);
-    ctx->masterCtx.c[1] = (k0&0xFFFF0000) | (k1&0xFFFF);
-    ctx->masterCtx.c[3] = (k1&0xFFFF0000) | (k2&0xFFFF);
-    ctx->masterCtx.c[5] = (k2&0xFFFF0000) | (k3&0xFFFF);
-    ctx->masterCtx.c[7] = (k3&0xFFFF0000) | (k0&0xFFFF);
-
-    /* Clear carry bit */
-    ctx->masterCtx.carry = 0;
-
-    /* Iterate the system four times */
-    for (i=0; i<4; i++)
-        RABBIT_next_state(&(ctx->masterCtx));
-
-    /* Modify the counters */
-    for (i=0; i<8; i++)
-        ctx->masterCtx.c[i] ^= ctx->masterCtx.x[(i+4)&0x7];
-
-    /* Copy master instance to work instance */
-    for (i=0; i<8; i++) {
-        ctx->workCtx.x[i] = ctx->masterCtx.x[i];
-        ctx->workCtx.c[i] = ctx->masterCtx.c[i];
-    }
-    ctx->workCtx.carry = ctx->masterCtx.carry;
-
-    wc_RabbitSetIV(ctx, iv);
-
-    return 0;
-}
-
-
-int wc_Rabbit_SetHeap(Rabbit* ctx, void* heap)
-{
-    if (ctx == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-#ifdef XSTREAM_ALIGN
-    ctx->heap = heap;
-#endif
-
-    (void)heap;
-    return 0;
-}
-
-
-/* Key setup */
-int wc_RabbitSetKey(Rabbit* ctx, const byte* key, const byte* iv)
-{
-    if (ctx == NULL || key == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-#ifdef XSTREAM_ALIGN
-    /* default heap to NULL or heap test value */
-    #ifdef WOLFSSL_HEAP_TEST
-        ctx->heap = (void*)WOLFSSL_HEAP_TEST;
-    #else
-        ctx->heap = NULL;
-    #endif /* WOLFSSL_HEAP_TEST */
-
-    if ((wolfssl_word)key % 4) {
-        int alignKey[4];
-
-        /* iv aligned in SetIV */
-        WOLFSSL_MSG("wc_RabbitSetKey unaligned key");
-
-        XMEMCPY(alignKey, key, sizeof(alignKey));
-
-        return DoKey(ctx, (const byte*)alignKey, iv);
-    }
-#endif /* XSTREAM_ALIGN */
-
-    return DoKey(ctx, key, iv);
-}
-
-
-/* Encrypt/decrypt a message of any size */
-static WC_INLINE int DoProcess(Rabbit* ctx, byte* output, const byte* input,
-                            word32 msglen)
-{
-    /* Encrypt/decrypt all full blocks */
-    while (msglen >= 16) {
-        /* Iterate the system */
-        RABBIT_next_state(&(ctx->workCtx));
-
-        /* Encrypt/decrypt 16 bytes of data */
-        *(word32*)(output+ 0) = *(word32*)(input+ 0) ^
-                   LITTLE32(ctx->workCtx.x[0] ^ (ctx->workCtx.x[5]>>16) ^
-                   U32V(ctx->workCtx.x[3]<<16));
-        *(word32*)(output+ 4) = *(word32*)(input+ 4) ^
-                   LITTLE32(ctx->workCtx.x[2] ^ (ctx->workCtx.x[7]>>16) ^
-                   U32V(ctx->workCtx.x[5]<<16));
-        *(word32*)(output+ 8) = *(word32*)(input+ 8) ^
-                   LITTLE32(ctx->workCtx.x[4] ^ (ctx->workCtx.x[1]>>16) ^
-                   U32V(ctx->workCtx.x[7]<<16));
-        *(word32*)(output+12) = *(word32*)(input+12) ^
-                   LITTLE32(ctx->workCtx.x[6] ^ (ctx->workCtx.x[3]>>16) ^
-                   U32V(ctx->workCtx.x[1]<<16));
-
-        /* Increment pointers and decrement length */
-        input  += 16;
-        output += 16;
-        msglen -= 16;
-    }
-
-    /* Encrypt/decrypt remaining data */
-    if (msglen) {
-
-        word32 i;
-        word32 tmp[4];
-        byte*  buffer = (byte*)tmp;
-
-        XMEMSET(tmp, 0, sizeof(tmp));   /* help static analysis */
-
-        /* Iterate the system */
-        RABBIT_next_state(&(ctx->workCtx));
-
-        /* Generate 16 bytes of pseudo-random data */
-        tmp[0] = LITTLE32(ctx->workCtx.x[0] ^
-                  (ctx->workCtx.x[5]>>16) ^ U32V(ctx->workCtx.x[3]<<16));
-        tmp[1] = LITTLE32(ctx->workCtx.x[2] ^
-                  (ctx->workCtx.x[7]>>16) ^ U32V(ctx->workCtx.x[5]<<16));
-        tmp[2] = LITTLE32(ctx->workCtx.x[4] ^
-                  (ctx->workCtx.x[1]>>16) ^ U32V(ctx->workCtx.x[7]<<16));
-        tmp[3] = LITTLE32(ctx->workCtx.x[6] ^
-                  (ctx->workCtx.x[3]>>16) ^ U32V(ctx->workCtx.x[1]<<16));
-
-        /* Encrypt/decrypt the data */
-        for (i=0; i<msglen; i++)
-            output[i] = input[i] ^ buffer[i];
-    }
-
-    return 0;
-}
-
-
-/* Encrypt/decrypt a message of any size */
-int wc_RabbitProcess(Rabbit* ctx, byte* output, const byte* input, word32 msglen)
-{
-    if (ctx == NULL || output == NULL || input == NULL) {
-        return BAD_FUNC_ARG;
-    }
-
-#ifdef XSTREAM_ALIGN
-    if ((wolfssl_word)input % 4 || (wolfssl_word)output % 4) {
-        #ifndef NO_WOLFSSL_ALLOC_ALIGN
-            byte* tmp;
-            WOLFSSL_MSG("wc_RabbitProcess unaligned");
-
-            tmp = (byte*)XMALLOC(msglen, ctx->heap, 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, ctx->heap, DYNAMIC_TYPE_TMP_BUFFER);
-
-            return 0;
-        #else
-            return BAD_ALIGN_E;
-        #endif
-    }
-#endif /* XSTREAM_ALIGN */
-
-    return DoProcess(ctx, output, input, msglen);
-}
-
-
-#endif /* NO_RABBIT */
-