+++ /dev/null
-/* jh_simple_speed.c */
-/*
- This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2006-2010 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/>.
-*/
-
-#include <stdint.h>
-#include <avr/pgmspace.h>
-#include <stdlib.h>
-#include <string.h>
-#include "memxor.h"
-#include "jh_simple.h"
-#include "jh_tables.h"
-
-#define DEBUG 0
-
-#if DEBUG
-#include "cli.h"
-#endif
-
-void jh_round(uint8_t* a, uint8_t roundno){
- uint8_t b[128];
- uint8_t i,r,u,v,x,y;
- uint8_t *pr;
- pr = jh_round_const + 32*roundno;
- for(i=0; i<128; ++i){
- if(i%4==0){
- r = pgm_read_byte(pr++);
- }
- b[i]=pgm_read_byte(&(jh_lutbox[((r&0xC0)<<2)|a[i]]));
- r<<=2;
- }
- for(i=0;i<128;++i){
- u = pgm_read_byte(jh_permutation_table+2*i);
- v = pgm_read_byte(jh_permutation_table+2*i+1);
- x = b[u>>1];
- y = b[v>>1];
- if(u&1){
- x <<= 4;
- }else{
- x &= 0xf0;
- }
- if(v&1){
- y &= 0x0f;
- }else{
- y >>= 4;
- }
- a[i] = x|y;
- }
-}
-
-uint8_t jh_l_inv(uint8_t a){
- uint8_t v,w;
- v = a>>4;
- w = a&0xf;
- v ^= ((w<<1)^(w>>3)^((w>>2)&2))&0xf;
- w ^= ((v<<1)^(v>>3)^((v>>2)&2))&0xf;
- return w|(v<<4);
-}
-
-void group(uint8_t *a){
- uint8_t b[128];
- uint8_t i,x,y;
- for(i=0; i<128; ++i){
- x = (((a[i/8+ 0])>>4)&0x8)
- | (((a[i/8+ 32])>>5)&0x4)
- | (((a[i/8+ 64])>>6)&0x2)
- | (((a[i/8+ 96])>>7)&0x1);
- a[i/8] <<= 1; a[i/8+32]<<=1; a[i/8+64]<<=1; a[i/8+96]<<=1;
- y = (((a[i/8+ 16])>>4)&0x8)
- | (((a[i/8+ 48])>>5)&0x4)
- | (((a[i/8+ 80])>>6)&0x2)
- | (((a[i/8+112])>>7)&0x1);
- a[i/8+16] <<= 1; a[i/8+48]<<=1; a[i/8+80]<<=1; a[i/8+112]<<=1;
- b[i]= (x<<4)|y;
- }
- memcpy(a,b,128);
-}
-
-void degroup(uint8_t *a){
- uint8_t b[128];
- uint8_t i,j;
- for(i=0;i<128;++i){
- j=i/8;
- b[j+ 0]<<=1; b[j+ 0] |= ((a[i])>>7)&1;
- b[j+ 32]<<=1; b[j+ 32] |= ((a[i])>>6)&1;
- b[j+ 64]<<=1; b[j+ 64] |= ((a[i])>>5)&1;
- b[j+ 96]<<=1; b[j+ 96] |= ((a[i])>>4)&1;
- b[j+ 16]<<=1; b[j+ 16] |= ((a[i])>>3)&1;
- b[j+ 48]<<=1; b[j+ 48] |= ((a[i])>>2)&1;
- b[j+ 80]<<=1; b[j+ 80] |= ((a[i])>>1)&1;
- b[j+112]<<=1; b[j+112] |= ((a[i])>>0)&1;
- }
- memcpy(a,b,128);
-}
-
-void jh_encrypt(uint8_t* a){
- uint8_t i;
- /* grouping */
-#if DEBUG
- cli_putstr_P(PSTR("\r\n== pre group ==\r\n"));
- cli_hexdump_block(a, 128, 4, 16);
-#endif
- group(a);
- for(i=0;i<35;++i){
- jh_round(a, i);
- }
- uint8_t r;
- uint8_t *pr;
-
- pr = jh_round_const + 32*35;
- for(i=0; i<128; ++i){
- if(i%4==0){
- r = pgm_read_byte(pr++);
- }
- a[i]=jh_l_inv(pgm_read_byte(&(jh_lutbox[((r&0xC0)<<2)|a[i]])));
- r<<=2;
- }
- /* degrouping */
-#if DEBUG
- cli_putstr_P(PSTR("\r\n== pre degroup ==\r\n"));
- cli_hexdump_block(a, 128, 4, 16);
-#endif
- degroup(a);
-#if DEBUG
- cli_putstr_P(PSTR("\r\n== post degroup ==\r\n"));
- cli_hexdump_block(a, 128, 4, 16);
-#endif
-}
-
-void jh_init(uint16_t hashlen_b, jh_ctx_t* ctx){
- memset(ctx->a, 0, 128);
- ctx->a[0] = hashlen_b>>8;
- ctx->a[1] = hashlen_b&0xff;
- jh_encrypt(ctx->a);
- ctx->block_hashed=0;
-}
-
-void jh_nextBlock(jh_ctx_t* ctx, void* block){
- memxor(ctx->a, block, 64);
- jh_encrypt(ctx->a);
- memxor(ctx->a+64, block, 64);
- ctx->block_hashed++;
-}
-
-void jh_lastBlock(jh_ctx_t* ctx, void* block, uint16_t length_b){
- while(length_b>=64*8){
- jh_nextBlock(ctx, block);
- block = (uint8_t*)block + 64;
- length_b -= 64*8;
- }
- uint8_t buffer[64];
- uint64_t total_length;
- memset(buffer, 0, 64);
- memcpy(buffer, block, (length_b+7)/8);
- buffer[length_b/8] |= 0x80>>(length_b%8);
- total_length=ctx->block_hashed*512+length_b;
- if(length_b==0){
-
- }else{
- jh_nextBlock(ctx, buffer);
- buffer[0]=0;
- }
- memset(buffer+1, 0, 64-8-1);
- buffer[63] = total_length&0xff;
- buffer[62] = (total_length>> 8)&0xff;
- buffer[61] = (total_length>>16)&0xff;
- buffer[60] = (total_length>>24)&0xff;
- buffer[59] = (total_length>>32)&0xff;
- buffer[58] = (total_length>>40)&0xff;
- buffer[57] = (total_length>>48)&0xff;
- buffer[56] = (total_length>>56)&0xff;
- jh_nextBlock(ctx, buffer);
-}
-
-void jh_ctx2hash(void* dest, uint16_t length_b, jh_ctx_t* ctx){
- memcpy(dest, ctx->a+128-(length_b+7)/8, (length_b+7)/8);
-}
-
-
-void jh224_init(jh_ctx_t* ctx){
- jh_init(224, ctx);
-}
-
-void jh224_ctx2hash(void* dest, jh_ctx_t* ctx){
- jh_ctx2hash(dest, 224, ctx);
-}
-
-void jh256_init(jh_ctx_t* ctx){
- jh_init(256, ctx);
-}
-
-void jh256_ctx2hash(void* dest, jh_ctx_t* ctx){
- jh_ctx2hash(dest, 256, ctx);
-}
-
-void jh384_init(jh_ctx_t* ctx){
- jh_init(384, ctx);
-}
-
-void jh384_ctx2hash(void* dest, jh_ctx_t* ctx){
- jh_ctx2hash(dest, 384, ctx);
-}
-
-void jh512_init(jh_ctx_t* ctx){
- jh_init(512, ctx);
-}
-
-void jh512_ctx2hash(void* dest, jh_ctx_t* ctx){
- jh_ctx2hash(dest, 512, ctx);
-}
projects / avr-crypto-lib.git / blobdiff