+++ /dev/null
-/* blake_small.c */
-/*
- This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
-
- This program 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 3 of the License, or
- (at your option) any later version.
-
- This program 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, see <http://www.gnu.org/licenses/>.
-*/
-/*
- * \file blake_small.c
- * \author Daniel Otte
- * \email daniel.otte@rub.de
- * \date 2009-05-04
- * \license GPLv3 or later
- *
- */
-
-#include <stdint.h>
-#include <string.h>
-#include <avr/pgmspace.h>
-#include "memxor.h"
-#include "blake_small.h"
-#include "blake_common.h"
-
-#define BUG_1 1 /* bug compatibility for zero length message */
-#define BUG_2 1 /* bug compatibility for messages of length%512=505...511 */
-
-
-uint32_t blake_c[] PROGMEM = {
- 0x243F6A88, 0x85A308D3,
- 0x13198A2E, 0x03707344,
- 0xA4093822, 0x299F31D0,
- 0x082EFA98, 0xEC4E6C89,
- 0x452821E6, 0x38D01377,
- 0xBE5466CF, 0x34E90C6C,
- 0xC0AC29B7, 0xC97C50DD,
- 0x3F84D5B5, 0xB5470917
-};
-
-#define ROTL32(a, n) (((a)<<(n))|((a)>>(32-(n))))
-#define ROTR32(a, n) (((a)>>(n))|((a)<<(32-(n))))
-#define CHANGE_ENDIAN32(a) (((a)<<24)| \
- ((0x0000ff00&(a))<<8)| \
- ((0x00ff0000&(a))>>8)| \
- (a)>>24 )
-
-void blake_small_expand(uint32_t* v, const blake_small_ctx_t* ctx){
- uint8_t i;
- memcpy(v, ctx->h, 8*4);
- for(i=0; i<8; ++i){
- v[8+i] = pgm_read_dword(&(blake_c[i]));
- }
- memxor((uint8_t*)v+8, ctx->s, 4*4);
-
-}
-
-void blake_small_changeendian(void* dest, const void* src){
- uint8_t i;
- for(i=0; i<16; ++i){
- ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(((uint32_t*)src)[i]);
- }
-}
-
-void blake_small_compress(uint32_t* v,const void* m){
- uint8_t r,i;
- uint8_t a,b,c,d, s0, s1;
- uint32_t lv[4];
- for(r=0; r<10; ++r){
- for(i=0; i<8; ++i){
- // blake_small_g(r, i, v, (uint32_t*)m);
- a = pgm_read_byte(blake_index_lut+4*i+0);
- b = pgm_read_byte(blake_index_lut+4*i+1);
- c = pgm_read_byte(blake_index_lut+4*i+2);
- d = pgm_read_byte(blake_index_lut+4*i+3);
- s0 = pgm_read_byte(blake_sigma+16*r+2*i+0);
- s1 = pgm_read_byte(blake_sigma+16*r+2*i+1);
- lv[0] = v[a];
- lv[1] = v[b];
- lv[2] = v[c];
- lv[3] = v[d];
-
- lv[0] += lv[1] + (((uint32_t*)m)[s0] ^ pgm_read_dword(&(blake_c[s1])));
- lv[3] = ROTR32(lv[3]^lv[0], 16);
- lv[2] += lv[3];
- lv[1] = ROTR32(lv[1]^lv[2], 12);
- lv[0] += lv[1] + (((uint32_t*)m)[s1] ^ pgm_read_dword(&(blake_c[s0])));
- lv[3] = ROTR32(lv[3]^lv[0], 8);
- lv[2] += lv[3];
- lv[1] = ROTR32(lv[1]^lv[2], 7);
-
- v[a] = lv[0];
- v[b] = lv[1];
- v[c] = lv[2];
- v[d] = lv[3];
-
- }
- }
-}
-
-void blake_small_collapse(blake_small_ctx_t* ctx, uint32_t* v){
- uint8_t i;
- for(i=0; i<8; ++i){
- ctx->h[i] ^= ctx->s[i%4] ^ v[i] ^ v[8+i];
- }
-}
-
-void blake_small_nextBlock(blake_small_ctx_t* ctx, const void* msg){
- uint32_t v[16];
- uint32_t m[16];
- union {
- uint64_t v64;
- uint32_t v32[2];
- }ctr;
- blake_small_expand(v,ctx);
- ctx->counter++;
- ctr.v64 = ctx->counter*512;
- v[12] ^= ctr.v32[0];
- v[13] ^= ctr.v32[0];
- v[14] ^= ctr.v32[1];
- v[15] ^= ctr.v32[1];
- blake_small_changeendian(m, msg);
- blake_small_compress(v, m);
- blake_small_collapse(ctx, v);
-}
-
-void blake_small_lastBlock(blake_small_ctx_t* ctx, const void* msg, uint16_t length_b){
- while(length_b>=BLAKE_SMALL_BLOCKSIZE){
- blake_small_nextBlock(ctx, msg);
- msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
- length_b -= BLAKE_SMALL_BLOCKSIZE;
- }
- uint8_t buffer[64];
- uint32_t v[16];
-#if BUG_2
- uint32_t tmp=0;
-#endif
- union {
- uint64_t v64;
- uint32_t v32[2];
- }ctr;
- ctr.v64 = ctx->counter*512+length_b;
-#if BUG_2
- if(length_b>=505){
- tmp =ctr.v32[0];
- ctr.v32[0] = ctx->counter*512;
- ctr.v32[0] |= 0x40+length_b-504;
- }
-#endif
- memset(buffer, 0, 64);
- memcpy(buffer, msg, (length_b+7)/8);
- buffer[length_b/8] |= 0x80 >> (length_b%8);
- blake_small_changeendian(buffer, buffer);
- blake_small_expand(v, ctx);
- v[12] ^= ctr.v32[0];
- v[13] ^= ctr.v32[0];
- v[14] ^= ctr.v32[1];
- v[15] ^= ctr.v32[1];
-#if BUG_2
- if(length_b>=505)
- ctr.v32[0] = tmp;
-#endif
-#if BUG_1
- if(length_b==0 && ctx->counter==0){
- v[14] ^= 1;
- v[15] ^= 1;
- }
-#endif
- if(length_b>512-64-2){
- blake_small_compress(v, buffer);
- blake_small_collapse(ctx, v);
- memset(buffer, 0, 64-8);
- blake_small_expand(v, ctx);
- }
- if(ctx->appendone)
- buffer[64-8-4] |= 0x01;
- *((uint32_t*)(&(buffer[64-8]))) = ctr.v32[1];
- *((uint32_t*)(&(buffer[64-4]))) = ctr.v32[0];
- blake_small_compress(v, buffer);
- blake_small_collapse(ctx, v);
-
-}
-
-uint32_t blake32_iv[] PROGMEM = {
- 0x6A09E667L, 0xBB67AE85,
- 0x3C6EF372L, 0xA54FF53A,
- 0x510E527FL, 0x9B05688C,
- 0x1F83D9ABL, 0x5BE0CD19
-};
-
-void blake32_init(blake32_ctx_t* ctx){
- uint8_t i;
- for(i=0; i<8; ++i){
- ctx->h[i] = pgm_read_dword(&(blake32_iv[i]));
- }
- memset(ctx->s, 0, 4*4);
- ctx->counter = 0;
- ctx->appendone = 1;
-}
-
-uint32_t blake28_iv[] PROGMEM = {
- 0xC1059ED8, 0x367CD507,
- 0x3070DD17, 0xF70E5939,
- 0xFFC00B31, 0x68581511,
- 0x64F98FA7, 0xBEFA4FA4
-};
-
-void blake28_init(blake28_ctx_t* ctx){
- uint8_t i;
- for(i=0; i<8; ++i){
- ctx->h[i] = pgm_read_dword(&(blake28_iv[i]));
- }
- memset(ctx->s, 0, 4*4);
- ctx->counter = 0;
- ctx->appendone = 0;
-}
-
-void blake32_ctx2hash(void* dest, const blake32_ctx_t* ctx){
- uint8_t i;
- for(i=0; i<8; ++i){
- ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(ctx->h[i]);
- }
-}
-
-void blake28_ctx2hash(void* dest, const blake28_ctx_t* ctx){
- uint8_t i;
- for(i=0; i<7; ++i){
- ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(ctx->h[i]);
- }
-}
-
-void blake32_nextBlock(blake32_ctx_t* ctx, const void* block){
- blake_small_nextBlock(ctx, block);
-}
-
-void blake28_nextBlock(blake28_ctx_t* ctx, const void* block){
- blake_small_nextBlock(ctx, block);
-}
-
-void blake32_lastBlock(blake32_ctx_t* ctx, const void* block, uint16_t length_b){
- blake_small_lastBlock(ctx, block, length_b);
-}
-
-void blake28_lastBlock(blake28_ctx_t* ctx, const void* block, uint16_t length_b){
- blake_small_lastBlock(ctx, block, length_b);
-}
-
-void blake32(void* dest, const void* msg, uint32_t length_b){
- blake_small_ctx_t ctx;
- blake32_init(&ctx);
- while(length_b>=BLAKE_SMALL_BLOCKSIZE){
- blake_small_nextBlock(&ctx, msg);
- msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
- length_b -= BLAKE_SMALL_BLOCKSIZE;
- }
- blake_small_lastBlock(&ctx, msg, length_b);
- blake32_ctx2hash(dest, &ctx);
-}
-
-void blake28(void* dest, const void* msg, uint32_t length_b){
- blake_small_ctx_t ctx;
- blake28_init(&ctx);
- while(length_b>=BLAKE_SMALL_BLOCKSIZE){
- blake_small_nextBlock(&ctx, msg);
- msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
- length_b -= BLAKE_SMALL_BLOCKSIZE;
- }
- blake_small_lastBlock(&ctx, msg, length_b);
- blake28_ctx2hash(dest, &ctx);
-}
projects / avr-crypto-lib.git / blobdiff