--- /dev/null
+/* 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 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
+
+void bmw_small_f1(uint32_t* q, const void* m, const void* h);
+void bmw_small_f0(uint32_t* h, const void* m, uint32_t* q);
+void bmw_small_f2(uint32_t* h, uint32_t* q, const void* m);
+
+/*
+static
+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[5] ^= SHL32(xh, 6) ^ SHR32(q[21], 6);
+ h[3] ^= SHR32(xh, 1) ^ SHL32(q[19], 5);
+ h[4] ^= SHR32(xh, 3) ^ q[20];
+ h[6] ^= SHR32(xh, 4) ^ SHL32(q[22], 6);
+ h[2] ^= SHR32(xh, 5) ^ SHL32(q[18], 5);
+ h[1] ^= SHR32(xh, 7) ^ SHL32(q[17], 8);
+ 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[11] += SHL32(xl, 4) ^ q[18] ^ q[11];
+ h[10] += SHL32(xl, 6) ^ q[17] ^ q[10];
+ h[ 8] += SHL32(xl, 8) ^ q[23] ^ q[ 8];
+ h[15] += SHR32(xl, 2) ^ q[22] ^ q[15];
+ h[12] += SHR32(xl, 3) ^ q[19] ^ q[12];
+ h[13] += SHR32(xl, 4) ^ q[20] ^ q[13];
+ h[ 9] += SHR32(xl, 6) ^ q[16] ^ q[ 9];
+ h[14] += SHR32(xl, 7) ^ q[21] ^ q[14];
+}
+*/
+void bmw_small_nextBlock(bmw_small_ctx_t* ctx, const void* block){
+ uint32_t q[32];
+ dump_x(block, 16, 'M');
+ bmw_small_f0(ctx->h, block, q);
+ dump_x(q, 16, 'Q');
+ bmw_small_f1(q, block, ctx->h);
+ 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);
+ uint8_t i;
+ uint32_t q[32];
+ memset(buffer, 0xaa, 64);
+ for(i=0; i<16;++i){
+ buffer[i*4] = i+0xa0;
+ }
+// dump_x(buffer, 16, 'A');
+ dump_x(ctx->h, 16, 'M');
+ bmw_small_f0((uint32_t*)buffer, ctx->h, q);
+ dump_x(buffer, 16, 'a');
+ dump_x(q, 16, 'Q');
+ bmw_small_f1(q, ctx->h, (uint32_t*)buffer);
+ dump_x(q, 32, 'Q');
+ bmw_small_f2((uint32_t*)buffer, q, ctx->h);
+ memcpy(ctx->h, buffer, 64);
+}
+
+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;
+ }
+ 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);
+}
+
+
projects / avr-crypto-lib.git / blobdiff