336 lines
9.8 KiB
C
336 lines
9.8 KiB
C
/* bmw_small.c */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* \file bmw_small.c
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* \author Daniel Otte
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* \email daniel.otte@rub.de
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* \date 2009-04-27
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* \license GPLv3 or later
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*
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*/
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#include <stdint.h>
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#include <string.h>
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#include "bmw_small.h"
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#define SHL32(a,n) ((a)<<(n))
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#define SHR32(a,n) ((a)>>(n))
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#define ROTL32(a,n) (((a)<<(n))|((a)>>(32-(n))))
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#define ROTR32(a,n) (((a)>>(n))|((a)<<(32-(n))))
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#define DEBUG 0
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#if DEBUG
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#include "cli.h"
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void ctx_dump(const bmw_small_ctx_t* ctx){
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uint8_t i;
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cli_putstr("\r\n==== ctx dump ====");
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for(i=0; i<16;++i){
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cli_putstr("\r\n h[");
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cli_hexdump(&i, 1);
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cli_putstr("] = ");
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cli_hexdump_rev(&(ctx->h[i]), 4);
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}
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cli_putstr("\r\n counter = ");
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cli_hexdump(&(ctx->counter), 4);
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}
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void dump_x(const uint32_t* q, uint8_t elements, char x){
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uint8_t i;
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cli_putstr("\r\n==== ");
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cli_putc(x);
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cli_putstr(" dump ====");
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for(i=0; i<elements;++i){
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cli_putstr("\r\n ");
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cli_putc(x);
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cli_putstr("[");
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cli_hexdump(&i, 1);
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cli_putstr("] = ");
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cli_hexdump_rev(&(q[i]), 4);
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}
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}
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#else
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#define ctx_dump(x)
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#define dump_x(a,b,c)
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#endif
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#define S32_0(x) ( (SHR32((x), 1)) ^ \
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(SHL32((x), 3)) ^ \
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(ROTL32((x), 4)) ^ \
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(ROTR32((x), 13)) )
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#define S32_1(x) ( (SHR32((x), 1)) ^ \
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(SHL32((x), 2)) ^ \
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(ROTL32((x), 8)) ^ \
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(ROTR32((x), 9)) )
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#define S32_2(x) ( (SHR32((x), 2)) ^ \
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(SHL32((x), 1)) ^ \
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(ROTL32((x), 12)) ^ \
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(ROTR32((x), 7)) )
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#define S32_3(x) ( (SHR32((x), 2)) ^ \
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(SHL32((x), 2)) ^ \
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(ROTL32((x), 15)) ^ \
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(ROTR32((x), 3)) )
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#define S32_4(x) ( (SHR32((x), 1)) ^ (x))
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#define S32_5(x) ( (SHR32((x), 2)) ^ (x))
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#define R32_1(x) (ROTL32((x), 3))
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#define R32_2(x) (ROTL32((x), 7))
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#define R32_3(x) (ROTL32((x), 13))
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#define R32_4(x) (ROTL32((x), 16))
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#define R32_5(x) (ROTR32((x), 13))
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#define R32_6(x) (ROTR32((x), 9))
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#define R32_7(x) (ROTR32((x), 5))
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#include "f1_autogen.i"
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/* static inline */
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void bmw_small_f0(uint32_t* q, uint32_t* h, const uint32_t* m){
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uint32_t t[16];
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uint32_t tr0, tr1, tr2, tmp;
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t[ 0] = h[ 0] ^ m[ 0];
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t[ 1] = h[ 1] ^ m[ 1];
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t[ 2] = h[ 2] ^ m[ 2];
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t[ 3] = h[ 3] ^ m[ 3];
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t[ 4] = h[ 4] ^ m[ 4];
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t[ 6] = h[ 6] ^ m[ 6];
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t[ 8] = h[ 8] ^ m[ 8];
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t[ 9] = h[ 9] ^ m[ 9];
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t[11] = h[11] ^ m[11];
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t[12] = h[12] ^ m[12];
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t[15] = h[15] ^ m[15];
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t[ 5] = h[ 5] ^ m[ 5];
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t[10] = h[10] ^ m[10];
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t[13] = h[13] ^ m[13];
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t[ 7] = h[ 7] ^ m[ 7];
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t[14] = h[14] ^ m[14];
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dump_x(t, 16, 'T');
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/*
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q[ 0] = (t[ 5] - t[ 7] + t[10] + t[13] + t[14]);
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q[ 3] = (t[ 0] - t[ 1] + t[ 8] - t[10] + t[13]);
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q[ 6] = (t[ 4] - t[ 0] - t[ 3] - t[11] + t[13]);
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q[ 9] = (t[ 0] - t[ 3] + t[ 6] - t[ 7] + t[14]);
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q[12] = (t[ 1] + t[ 3] - t[ 6] - t[ 9] + t[10]);
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q[15] = (t[12] - t[ 4] - t[ 6] - t[ 9] + t[13]);
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q[ 2] = (t[ 0] + t[ 7] + t[ 9] - t[12] + t[15]);
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q[ 5] = (t[ 3] - t[ 2] + t[10] - t[12] + t[15]);
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q[ 8] = (t[ 2] - t[ 5] - t[ 6] + t[13] - t[15]);
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q[11] = (t[ 8] - t[ 0] - t[ 2] - t[ 5] + t[ 9]);
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q[14] = (t[ 3] - t[ 5] + t[ 8] - t[11] - t[12]);
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q[ 1] = (t[ 6] - t[ 8] + t[11] + t[14] - t[15]);
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q[ 4] = (t[ 1] + t[ 2] + t[ 9] - t[11] - t[14]);
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q[ 7] = (t[ 1] - t[ 4] - t[ 5] - t[12] - t[14]);
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q[10] = (t[ 8] - t[ 1] - t[ 4] - t[ 7] + t[15]);
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q[13] = (t[ 2] + t[ 4] + t[ 7] + t[10] + t[11]);
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*/
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tmp = +t[ 5] +t[10] +t[13] +(tr1=-t[ 7]+t[14]) ;
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q[ 0] = S32_0(tmp) + h[ 1];
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tmp = +t[ 8] +t[13] +t[ 0] -(tr2=+t[ 1]+t[10]) ;
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q[ 3] = S32_3(tmp) + h[ 4];
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tmp = -t[11] +t[13] -t[ 0] -t[ 3] +t[ 4] ;
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q[ 6] = S32_1(tmp) + h[ 7];
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tmp = +t[ 0] +(tr0=-t[ 3]+t[ 6]) +(tr1) ;
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q[ 9] = S32_4(tmp) + h[10];
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tmp = -t[ 9] -(tr0) +(tr2) ;
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q[12] = S32_2(tmp) + h[13];
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tmp = -t[ 4] +(tr0=-t[ 9]+t[12]) +(tr1=-t[ 6]+t[13]) ;
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q[15] = S32_0(tmp) + h[ 0];
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tmp = +t[ 7] +t[15] +t[ 0] -(tr0) ;
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q[ 2] = S32_2(tmp) + h[ 3];
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tmp = +t[10] +(tr0=-t[ 2]+t[15]) +(tr2=+t[ 3]-t[12]) ;
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q[ 5] = S32_0(tmp) + h[ 6];
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tmp = -t[ 5] -(tr0) +(tr1) ;
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q[ 8] = S32_3(tmp) + h[ 9];
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tmp = -t[ 0] -t[ 2] +t[ 9] +(tr0=-t[ 5]+t[ 8]) ;
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q[11] = S32_1(tmp) + h[12];
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tmp = -t[11] +(tr0) +(tr2) ;
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q[14] = S32_4(tmp) + h[15];
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tmp = +t[ 6] +(tr0=+t[11]+t[14]) -(tr1=+t[ 8]+t[15]) ;
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q[ 1] = S32_1(tmp) + h[ 2];
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tmp = +t[ 9] +t[ 1] +t[ 2] -(tr0) ;
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q[ 4] = S32_4(tmp) + h[ 5];
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tmp = -t[12] -t[14] +t[ 1] -t[ 4] -t[ 5] ;
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q[ 7] = S32_2(tmp) + h[ 8];
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tmp = -t[ 1] -(tr0=+t[ 4]+t[ 7]) +(tr1) ;
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q[10] = S32_0(tmp) + h[11];
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tmp = +t[ 2] +t[10] +t[11] +(tr0) ;
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q[13] = S32_3(tmp) + h[14];
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dump_x(q, 16, 'W');
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}
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static inline
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void bmw_small_f2(uint32_t* h, uint32_t* q, const uint32_t* m){
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uint32_t xl, xh;
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xl = q[16] ^ q[17] ^ q[18] ^ q[19] ^ q[20] ^ q[21] ^ q[22] ^ q[23];
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xh = xl ^ q[24] ^ q[25] ^ q[26] ^ q[27] ^ q[28] ^ q[29] ^ q[30] ^ q[31];
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#if DEBUG
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cli_putstr("\r\n XL = ");
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cli_hexdump_rev(&xl, 4);
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cli_putstr("\r\n XH = ");
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cli_hexdump_rev(&xh, 4);
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#endif
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h[0] = (SHL32(xh, 5) ^ SHR32(q[16], 5) ^ m[ 0]) + (xl ^ q[24] ^ q[ 0]);
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h[1] = (SHR32(xh, 7) ^ SHL32(q[17], 8) ^ m[ 1]) + (xl ^ q[25] ^ q[ 1]);
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h[2] = (SHR32(xh, 5) ^ SHL32(q[18], 5) ^ m[ 2]) + (xl ^ q[26] ^ q[ 2]);
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h[3] = (SHR32(xh, 1) ^ SHL32(q[19], 5) ^ m[ 3]) + (xl ^ q[27] ^ q[ 3]);
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h[4] = (SHR32(xh, 3) ^ q[20] ^ m[ 4]) + (xl ^ q[28] ^ q[ 4]);
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h[5] = (SHL32(xh, 6) ^ SHR32(q[21], 6) ^ m[ 5]) + (xl ^ q[29] ^ q[ 5]);
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h[6] = (SHR32(xh, 4) ^ SHL32(q[22], 6) ^ m[ 6]) + (xl ^ q[30] ^ q[ 6]);
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h[7] = (SHR32(xh,11) ^ SHL32(q[23], 2) ^ m[ 7]) + (xl ^ q[31] ^ q[ 7]);
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h[ 8] = ROTL32(h[4], 9) + (xh ^ q[24] ^ m[ 8]) + (SHL32(xl, 8) ^ q[23] ^ q[ 8]);
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h[ 9] = ROTL32(h[5], 10) + (xh ^ q[25] ^ m[ 9]) + (SHR32(xl, 6) ^ q[16] ^ q[ 9]);
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h[10] = ROTL32(h[6], 11) + (xh ^ q[26] ^ m[10]) + (SHL32(xl, 6) ^ q[17] ^ q[10]);
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h[11] = ROTL32(h[7], 12) + (xh ^ q[27] ^ m[11]) + (SHL32(xl, 4) ^ q[18] ^ q[11]);
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h[12] = ROTL32(h[0], 13) + (xh ^ q[28] ^ m[12]) + (SHR32(xl, 3) ^ q[19] ^ q[12]);
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h[13] = ROTL32(h[1], 14) + (xh ^ q[29] ^ m[13]) + (SHR32(xl, 4) ^ q[20] ^ q[13]);
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h[14] = ROTL32(h[2], 15) + (xh ^ q[30] ^ m[14]) + (SHR32(xl, 7) ^ q[21] ^ q[14]);
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h[15] = ROTL32(h[3], 16) + (xh ^ q[31] ^ m[15]) + (SHR32(xl, 2) ^ q[22] ^ q[15]);
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}
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void bmw_small_nextBlock(bmw_small_ctx_t* ctx, const void* block){
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uint32_t q[32];
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dump_x(block, 16, 'M');
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bmw_small_f0(q, ctx->h, block);
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dump_x(q, 16, 'Q');
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bmw_small_f1(q, block, ctx->h);
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dump_x(q+16, 16, 'Q');
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bmw_small_f2(ctx->h, q, block);
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ctx->counter += 1;
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ctx_dump(ctx);
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}
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void bmw_small_lastBlock(bmw_small_ctx_t* ctx, const void* block, uint16_t length_b){
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union {
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uint8_t v8[64];
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uint32_t v32[16];
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uint64_t v64[ 8];
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} buffer;
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while(length_b >= BMW_SMALL_BLOCKSIZE){
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bmw_small_nextBlock(ctx, block);
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length_b -= BMW_SMALL_BLOCKSIZE;
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block = (uint8_t*)block + BMW_SMALL_BLOCKSIZE_B;
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}
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memset(buffer.v8, 0, 64);
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memcpy(buffer.v8, block, (length_b+7)/8);
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buffer.v8[length_b>>3] |= 0x80 >> (length_b&0x07);
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if(length_b+1>64*8-64){
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bmw_small_nextBlock(ctx, buffer.v8);
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memset(buffer.v8, 0, 64-8);
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ctx->counter -= 1;
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}
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buffer.v64[7] = (uint64_t)(ctx->counter*512LL)+(uint64_t)length_b;
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bmw_small_nextBlock(ctx, buffer.v8);
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uint8_t i;
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uint32_t q[32];
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memset(buffer.v8, 0xaa, 64);
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for(i=0; i<16;++i){
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buffer.v8[i*4] = i+0xa0;
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}
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// dump_x(buffer.v8, 16, 'A');
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dump_x(ctx->h, 16, 'M');
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bmw_small_f0(q, buffer.v32, ctx->h);
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dump_x(buffer.v8, 16, 'a');
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dump_x(q, 16, 'Q');
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bmw_small_f1(q, ctx->h, buffer.v32);
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dump_x(q, 32, 'Q');
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bmw_small_f2(buffer.v32, q, ctx->h);
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memcpy(ctx->h, buffer.v8, 64);
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}
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void bmw224_init(bmw224_ctx_t* ctx){
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uint8_t i;
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ctx->h[0] = 0x00010203;
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for(i=1; i<16; ++i){
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ctx->h[i] = ctx->h[i-1]+ 0x04040404;
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}
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ctx->counter=0;
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ctx_dump(ctx);
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}
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void bmw256_init(bmw256_ctx_t* ctx){
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uint8_t i;
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ctx->h[0] = 0x40414243;
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for(i=1; i<16; ++i){
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ctx->h[i] = ctx->h[i-1]+ 0x04040404;
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}
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ctx->counter=0;
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ctx_dump(ctx);
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}
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void bmw224_nextBlock(bmw224_ctx_t* ctx, const void* block){
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bmw_small_nextBlock(ctx, block);
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}
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void bmw256_nextBlock(bmw256_ctx_t* ctx, const void* block){
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bmw_small_nextBlock(ctx, block);
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}
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void bmw224_lastBlock(bmw224_ctx_t* ctx, const void* block, uint16_t length_b){
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bmw_small_lastBlock(ctx, block, length_b);
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}
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void bmw256_lastBlock(bmw256_ctx_t* ctx, const void* block, uint16_t length_b){
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bmw_small_lastBlock(ctx, block, length_b);
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}
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void bmw224_ctx2hash(void* dest, const bmw224_ctx_t* ctx){
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memcpy(dest, &(ctx->h[9]), 224/8);
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}
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void bmw256_ctx2hash(void* dest, const bmw256_ctx_t* ctx){
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memcpy(dest, &(ctx->h[8]), 256/8);
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}
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void bmw224(void* dest, const void* msg, uint32_t length_b){
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bmw_small_ctx_t ctx;
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bmw224_init(&ctx);
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while(length_b>=BMW_SMALL_BLOCKSIZE){
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bmw_small_nextBlock(&ctx, msg);
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length_b -= BMW_SMALL_BLOCKSIZE;
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msg = (uint8_t*)msg + BMW_SMALL_BLOCKSIZE_B;
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}
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bmw_small_lastBlock(&ctx, msg, length_b);
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bmw224_ctx2hash(dest, &ctx);
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}
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void bmw256(void* dest, const void* msg, uint32_t length_b){
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bmw_small_ctx_t ctx;
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bmw256_init(&ctx);
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while(length_b>=BMW_SMALL_BLOCKSIZE){
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bmw_small_nextBlock(&ctx, msg);
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length_b -= BMW_SMALL_BLOCKSIZE;
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msg = (uint8_t*)msg + BMW_SMALL_BLOCKSIZE_B;
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}
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bmw_small_lastBlock(&ctx, msg, length_b);
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bmw256_ctx2hash(dest, &ctx);
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}
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