--- /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 DEBUG 0
+#define DEBUG_2 0
+
+#define BUG_1 0 /* bug compatibility for zero length message */
+#define BUG_2 0 /* bug compatibility for messages of length%512=505...511 */
+
+
+#if DEBUG_2
+ #include "cli.h"
+#endif
+
+#if DEBUG
+ #include "cli.h"
+ void dump_v(uint32_t* v){
+ uint8_t i;
+ cli_putstr_P(PSTR("\r\n=== v dump ==="));
+ for(i=0; i<16; ++i){
+ if(i%8==0)
+ cli_putstr_P(PSTR("\r\n\t"));
+ cli_hexdump_rev(v+i, 4);
+ cli_putc(' ');
+ }
+ }
+#else
+ #define dump_v(v)
+#endif
+
+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_g(uint8_t r, uint8_t i, uint32_t* v, const uint32_t* m){
+ uint8_t a,b,c,d, s0, s1;
+ 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);
+#if DEBUG
+ if(i==0){
+ cli_putstr_P(PSTR("\r\n s0 = "));
+ cli_hexdump(&s0, 1);
+ cli_putstr_P(PSTR(" s1 = "));
+ cli_hexdump(&s1, 1);
+ cli_putstr_P(PSTR("\r\n m[s0] = "));
+ cli_hexdump_rev(m+s0, 4);
+ cli_putstr_P(PSTR("\r\n m[s1] = "));
+ cli_hexdump_rev(m+s1, 4);
+ }
+#endif
+ v[a] += v[b] + (m[s0] ^ pgm_read_dword(&(blake_c[s1])));
+ v[d] = ROTR32(v[d]^v[a], 16);
+ v[c] += v[d];
+ v[b] = ROTR32(v[b]^v[c], 12);
+ v[a] += v[b] + (m[s1] ^ pgm_read_dword(&(blake_c[s0])));
+ v[d] = ROTR32(v[d]^v[a], 8);
+ v[c] += v[d];
+ v[b] = ROTR32(v[b]^v[c], 7);
+
+}
+
+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;
+#if DEBUG
+ cli_putstr_P(PSTR("\r\n== compress 32 =="));
+ dump_v(v);
+#endif
+#if DEBUG_2
+ cli_putstr_P(PSTR("\r\n=== message block ===\r\n m ="));
+ cli_hexdump_block(m, 512/8, 4, 16);
+#endif
+ for(r=0; r<10; ++r){
+ for(i=0; i<8; ++i){
+ blake_small_g(r, i, v, (uint32_t*)m);
+#if DEBUG
+ if(1){
+ cli_putstr_P(PSTR("\r\n ROUND: "));
+ cli_hexdump(&r,1);
+ cli_putstr_P(PSTR(" I: "));
+ cli_hexdump(&i,1);
+ dump_v(v);
+ }
+#endif
+ }
+ }
+}
+
+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