bg
/
avr-crypto-lib
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
avr-crypto-lib/bmw_small.c

448 lines
11 KiB
C
Raw Blame History

/* bmw_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 bmw_small.c
* \author Daniel Otte
* \email daniel.otte@rub.de
* \date 2009-04-27
* \license GPLv3 or later
*
*/
#include <stdint.h>
#include <string.h>
#include <avr/pgmspace.h>
#include "bmw_small.h"
#define SHL32(a,n) ((a)<<(n))
#define SHR32(a,n) ((a)>>(n))
#define ROTL32(a,n) (((a)<<(n))|((a)>>(32-(n))))
#define ROTR32(a,n) (((a)>>(n))|((a)<<(32-(n))))
#define BUG24 1
#define F0_HACK 1
#define DEBUG 0
#if DEBUG
#include "cli.h"
void ctx_dump(const bmw_small_ctx_t* ctx){
uint8_t i;
cli_putstr_P(PSTR("\r\n==== ctx dump ===="));
for(i=0; i<16;++i){
cli_putstr_P(PSTR("\r\n h["));
cli_hexdump(&i, 1);
cli_putstr_P(PSTR("] = "));
cli_hexdump_rev(&(ctx->h[i]), 4);
}
cli_putstr_P(PSTR("\r\n counter = "));
cli_hexdump(&(ctx->counter), 4);
}
void dump_x(const uint32_t* q, uint8_t elements, char x){
uint8_t i;
cli_putstr_P(PSTR("\r\n==== "));
cli_putc(x);
cli_putstr_P(PSTR(" dump ===="));
for(i=0; i<elements;++i){
cli_putstr_P(PSTR("\r\n "));
cli_putc(x);
cli_putstr_P(PSTR("["));
cli_hexdump(&i, 1);
cli_putstr_P(PSTR("] = "));
cli_hexdump_rev(&(q[i]), 4);
}
}
#else
#define ctx_dump(x)
#define dump_x(a,b,c)
#endif
uint32_t bmw_small_s0(uint32_t x){
uint32_t r;
r = SHR32(x, 1)
^ SHL32(x, 3)
^ ROTL32(x, 4)
^ ROTR32(x, 13);
return r;
}
uint32_t bmw_small_s1(uint32_t x){
uint32_t r;
r = SHR32(x, 1)
^ SHL32(x, 2)
^ ROTL32(x, 8)
^ ROTR32(x, 9);
return r;
}
uint32_t bmw_small_s2(uint32_t x){
uint32_t r;
r = SHR32(x, 2)
^ SHL32(x, 1)
^ ROTL32(x, 12)
^ ROTR32(x, 7);
return r;
}
uint32_t bmw_small_s3(uint32_t x){
uint32_t r;
r = SHR32(x, 2)
^ SHL32(x, 2)
^ ROTL32(x, 15)
^ ROTR32(x, 3);
return r;
}
uint32_t bmw_small_s4(uint32_t x){
uint32_t r;
r = SHR32(x, 1)
^ x;
return r;
}
uint32_t bmw_small_s5(uint32_t x){
uint32_t r;
r = SHR32(x, 2)
^ x;
return r;
}
uint32_t bmw_small_r1(uint32_t x){
uint32_t r;
r = ROTL32(x, 3);
return r;
}
uint32_t bmw_small_r2(uint32_t x){
uint32_t r;
r = ROTL32(x, 7);
return r;
}
uint32_t bmw_small_r3(uint32_t x){
uint32_t r;
r = ROTL32(x, 13);
return r;
}
uint32_t bmw_small_r4(uint32_t x){
uint32_t r;
r = ROTL32(x, 16);
return r;
}
uint32_t bmw_small_r5(uint32_t x){
uint32_t r;
r = ROTR32(x, 13);
return r;
}
uint32_t bmw_small_r6(uint32_t x){
uint32_t r;
r = ROTR32(x, 9);
return r;
}
uint32_t bmw_small_r7(uint32_t x){
uint32_t r;
r = ROTR32(x, 5);
return r;
}
#define K 0x05555555L
static
uint32_t k_lut[] PROGMEM = {
16L*K, 17L*K, 18L*K, 19L*K, 20L*K, 21L*K, 22L*K, 23L*K,
24L*K, 25L*K, 26L*K, 27L*K, 28L*K, 29L*K, 30L*K, 31L*K
};
uint32_t bmw_small_expand1(uint8_t j, const uint32_t* q, const void* m){
uint32_t(*s[])(uint32_t) = {bmw_small_s1, bmw_small_s2, bmw_small_s3, bmw_small_s0};
uint32_t r;
uint8_t i;
/* r = 0x05555555*(j+16); */
r = pgm_read_dword(k_lut+j);
for(i=0; i<16; ++i){
r += s[i%4](q[j+i]);
}
r += ((uint32_t*)m)[j];
r += ((uint32_t*)m)[j+3];
r -= ((uint32_t*)m)[j+10];
return r;
}
uint32_t bmw_small_expand2(uint8_t j, const uint32_t* q, const void* m){
uint32_t(*rf[])(uint32_t) = {bmw_small_r1, bmw_small_r2, bmw_small_r3,
bmw_small_r4, bmw_small_r5, bmw_small_r6,
bmw_small_r7};
uint32_t r;
uint8_t i;
/* r = 0x05555555*(j+16); */
r = pgm_read_dword(k_lut+j);
for(i=0; i<14; i+=2){
r += q[j+i];
}
for(i=0; i<14; i+=2){
r += rf[i/2](q[j+i+1]);
}
r += bmw_small_s5(q[j+14]);
r += bmw_small_s4(q[j+15]);
r += ((uint32_t*)m)[j];
r += ((uint32_t*)m)[(j+3)%16];
r -= ((uint32_t*)m)[(j+10)%16];
return r;
}
#if F0_HACK
static
uint8_t f0_lut[] PROGMEM = {
5<<1, ( 7<<1)+1, (10<<1)+0, (13<<1)+0, (14<<1)+0,
6<<1, ( 8<<1)+1, (11<<1)+0, (14<<1)+0, (15<<1)+1,
0<<1, ( 7<<1)+0, ( 9<<1)+0, (12<<1)+1, (15<<1)+0,
0<<1, ( 1<<1)+1, ( 8<<1)+0, (10<<1)+1, (13<<1)+0,
1<<1, ( 2<<1)+0, ( 9<<1)+0, (11<<1)+1, (14<<1)+1,
3<<1, ( 2<<1)+1, (10<<1)+0, (12<<1)+1, (15<<1)+0,
4<<1, ( 0<<1)+1, ( 3<<1)+1, (11<<1)+1, (13<<1)+0,
1<<1, ( 4<<1)+1, ( 5<<1)+1, (12<<1)+1, (14<<1)+1,
2<<1, ( 5<<1)+1, ( 6<<1)+1, (13<<1)+0, (15<<1)+1,
0<<1, ( 3<<1)+1, ( 6<<1)+0, ( 7<<1)+1, (14<<1)+0,
8<<1, ( 1<<1)+1, ( 4<<1)+1, ( 7<<1)+1, (15<<1)+0,
8<<1, ( 0<<1)+1, ( 2<<1)+1, ( 5<<1)+1, ( 9<<1)+0,
1<<1, ( 3<<1)+0, ( 6<<1)+1, ( 9<<1)+1, (10<<1)+0,
2<<1, ( 4<<1)+0, ( 7<<1)+0, (10<<1)+0, (11<<1)+0,
3<<1, ( 5<<1)+1, ( 8<<1)+0, (11<<1)+1, (12<<1)+1,
12<<1, ( 4<<1)+1, ( 6<<1)+1, ( 9<<1)+1, (13<<1)+0
};
void bmw_small_f0(uint32_t* q, uint32_t* h, const void* m){
uint8_t i,j=0,v,sign,l=4;
uint32_t(*s[])(uint32_t)={ bmw_small_s0, bmw_small_s1, bmw_small_s2,
bmw_small_s3, bmw_small_s4 };
for(i=0; i<16; ++i){
h[i] ^= ((uint32_t*)m)[i];
}
dump_x(h, 16, 'T');
memset(q, 0, 4*16);
for(i=0; i<5*16; ++i){
v = pgm_read_byte(f0_lut+i);
sign = v&1;
v >>=1;
if(sign){
q[j] -= h[v];
}else{
q[j] += h[v];
}
if(i==l){
j++;
l+=5;
}
}
dump_x(q, 16, 'W');
for(i=0; i<16; ++i){
q[i] = s[i%5](q[i]);
}
}
#else
void bmw_small_f0(uint32_t* q, uint32_t* h, const void* m){
uint8_t i;
uint32_t(*s[])(uint32_t)={ bmw_small_s0, bmw_small_s1, bmw_small_s2,
bmw_small_s3, bmw_small_s4 };
for(i=0; i<16; ++i){
h[i] ^= ((uint32_t*)m)[i];
}
dump_x(h, 16, 'T');
q[ 0] = (h[ 5] - h[ 7] + h[10] + h[13] + h[14]);
q[ 1] = (h[ 6] - h[ 8] + h[11] + h[14] - h[15]);
q[ 2] = (h[ 0] + h[ 7] + h[ 9] - h[12] + h[15]);
q[ 3] = (h[ 0] - h[ 1] + h[ 8] - h[10] + h[13]);
q[ 4] = (h[ 1] + h[ 2] + h[ 9] - h[11] - h[14]);
q[ 5] = (h[ 3] - h[ 2] + h[10] - h[12] + h[15]);
q[ 6] = (h[ 4] - h[ 0] - h[ 3] - h[11] + h[13]);
q[ 7] = (h[ 1] - h[ 4] - h[ 5] - h[12] - h[14]);
q[ 8] = (h[ 2] - h[ 5] - h[ 6] + h[13] - h[15]);
q[ 9] = (h[ 0] - h[ 3] + h[ 6] - h[ 7] + h[14]);
q[10] = (h[ 8] - h[ 1] - h[ 4] - h[ 7] + h[15]);
q[11] = (h[ 8] - h[ 0] - h[ 2] - h[ 5] + h[ 9]);
q[12] = (h[ 1] + h[ 3] - h[ 6] - h[ 9] + h[10]);
q[13] = (h[ 2] + h[ 4] + h[ 7] + h[10] + h[11]);
q[14] = (h[ 3] - h[ 5] + h[ 8] - h[11] - h[12]);
q[15] = (h[12] - h[ 4] - h[ 6] - h[ 9] + h[13]);
dump_x(q, 16, 'W');
for(i=0; i<16; ++i){
q[i] = s[i%5](q[i]);
}
}
#endif
void bmw_small_f1(uint32_t* q, const void* m){
uint8_t i;
q[16] = bmw_small_expand1(0, q, m);
q[17] = bmw_small_expand1(1, q, m);
for(i=2; i<16; ++i){
q[16+i] = bmw_small_expand2(i, q, m);
}
}
void bmw_small_f2(uint32_t* h, const uint32_t* q, const void* m){
uint32_t xl=0, xh;
uint8_t i;
for(i=16;i<24;++i){
xl ^= q[i];
}
xh = xl;
for(i=24;i<32;++i){
xh ^= q[i];
}
#if DEBUG
cli_putstr_P(PSTR("\r\n XL = "));
cli_hexdump_rev(&xl, 4);
cli_putstr_P(PSTR("\r\n XH = "));
cli_hexdump_rev(&xh, 4);
#endif
memcpy(h, m, 16*4);
h[0] ^= SHL32(xh, 5) ^ SHR32(q[16], 5);
h[1] ^= SHR32(xh, 7) ^ SHL32(q[17], 8);
h[2] ^= SHR32(xh, 5) ^ SHL32(q[18], 5);
h[3] ^= SHR32(xh, 1) ^ SHL32(q[19], 5);
h[4] ^= SHR32(xh, 3) ^ q[20];
h[5] ^= SHL32(xh, 6) ^ SHR32(q[21], 6);
h[6] ^= SHR32(xh, 4) ^ SHL32(q[22], 6);
h[7] ^= SHR32(xh,11) ^ SHL32(q[23], 2);
for(i=0; i<8; ++i){
h[i] += xl ^ q[24+i] ^ q[i];
}
for(i=0; i<8; ++i){
h[8+i] ^= xh ^ q[24+i];
h[8+i] += ROTL32(h[(4+i)%8],i+9);
}
h[ 8] += SHL32(xl, 8) ^ q[23] ^ q[ 8];
h[ 9] += SHR32(xl, 6) ^ q[16] ^ q[ 9];
h[10] += SHL32(xl, 6) ^ q[17] ^ q[10];
h[11] += SHL32(xl, 4) ^ q[18] ^ q[11];
h[12] += SHR32(xl, 3) ^ q[19] ^ q[12];
h[13] += SHR32(xl, 4) ^ q[20] ^ q[13];
h[14] += SHR32(xl, 7) ^ q[21] ^ q[14];
h[15] += SHR32(xl, 2) ^ q[22] ^ q[15];
}
void bmw_small_nextBlock(bmw_small_ctx_t* ctx, const void* block){
uint32_t q[32];
dump_x(block, 16, 'M');
bmw_small_f0(q, ctx->h, block);
dump_x(q, 16, 'Q');
bmw_small_f1(q, block);
dump_x(q, 32, 'Q');
bmw_small_f2(ctx->h, q, block);
ctx->counter += 1;
ctx_dump(ctx);
}
void bmw_small_lastBlock(bmw_small_ctx_t* ctx, const void* block, uint16_t length_b){
uint8_t buffer[64];
while(length_b >= BMW_SMALL_BLOCKSIZE){
bmw_small_nextBlock(ctx, block);
length_b -= BMW_SMALL_BLOCKSIZE;
block = (uint8_t*)block + BMW_SMALL_BLOCKSIZE_B;
}
memset(buffer, 0, 64);
memcpy(buffer, block, (length_b+7)/8);
buffer[length_b>>3] |= 0x80 >> (length_b&0x07);
if(length_b+1>64*8-64){
bmw_small_nextBlock(ctx, buffer);
memset(buffer, 0, 64-8);
ctx->counter -= 1;
}
*((uint64_t*)&(buffer[64-8])) = (uint64_t)(ctx->counter*512LL)+(uint64_t)length_b;
bmw_small_nextBlock(ctx, buffer);
}
void bmw224_init(bmw224_ctx_t* ctx){
uint8_t i;
ctx->h[0] = 0x00010203;
for(i=1; i<16; ++i){
ctx->h[i] = ctx->h[i-1]+ 0x04040404;
}
#if BUG24
ctx->h[13] = 0x24353637;
#endif
ctx->counter=0;
ctx_dump(ctx);
}
void bmw256_init(bmw256_ctx_t* ctx){
uint8_t i;
ctx->h[0] = 0x40414243;
for(i=1; i<16; ++i){
ctx->h[i] = ctx->h[i-1]+ 0x04040404;
}
ctx->counter=0;
ctx_dump(ctx);
}
void bmw224_nextBlock(bmw224_ctx_t* ctx, const void* block){
bmw_small_nextBlock(ctx, block);
}
void bmw256_nextBlock(bmw256_ctx_t* ctx, const void* block){
bmw_small_nextBlock(ctx, block);
}
void bmw224_lastBlock(bmw224_ctx_t* ctx, const void* block, uint16_t length_b){
bmw_small_lastBlock(ctx, block, length_b);
}
void bmw256_lastBlock(bmw256_ctx_t* ctx, const void* block, uint16_t length_b){
bmw_small_lastBlock(ctx, block, length_b);
}
void bmw224_ctx2hash(void* dest, const bmw224_ctx_t* ctx){
memcpy(dest, &(ctx->h[9]), 224/8);
}
void bmw256_ctx2hash(void* dest, const bmw256_ctx_t* ctx){
memcpy(dest, &(ctx->h[8]), 256/8);
}
void bmw224(void* dest, const void* msg, uint32_t length_b){
bmw_small_ctx_t ctx;
bmw224_init(&ctx);
while(length_b>=BMW_SMALL_BLOCKSIZE){
bmw_small_nextBlock(&ctx, msg);
length_b -= BMW_SMALL_BLOCKSIZE;
msg = (uint8_t*)msg + BMW_SMALL_BLOCKSIZE_B;
}
bmw_small_lastBlock(&ctx, msg, length_b);
bmw224_ctx2hash(dest, &ctx);
}
void bmw256(void* dest, const void* msg, uint32_t length_b){
bmw_small_ctx_t ctx;
bmw256_init(&ctx);
while(length_b>=BMW_SMALL_BLOCKSIZE){
bmw_small_nextBlock(&ctx, msg);
length_b -= BMW_SMALL_BLOCKSIZE;
msg = (uint8_t*)msg + BMW_SMALL_BLOCKSIZE_B;
}
bmw_small_lastBlock(&ctx, msg, length_b);
bmw256_ctx2hash(dest, &ctx);
}
Reference in New Issue View Git Blame Copy Permalink