/* echo.c */
/*
This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2010 Daniel Otte (daniel.otte@rub.de)
+ Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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
#include "echo.h"
#include "gf256mul.h"
#include "memxor.h"
+#include "aes_enc_round.h"
#include <stdint.h>
#include <string.h>
#include "cli.h"
#endif
-void aes_encrypt_round(void* state, void* key);
#define INDEX(c,r) ((c)*16*4+(r)*16)
#define GF256MUL_2(a) (gf256mul(2, (a), 0x1b))
#define GF256MUL_3(a) (gf256mul(3, (a), 0x1b))
-static void mixcol(uint8_t* s){
+static void mixcol(uint8_t *s){
uint8_t t, tmp[4];
tmp[0] = *(s+16*0);
tmp[1] = *(s+16*1);
}
#if DEBUG
-static void dump_state(void* s){
+static void dump_state(void *s){
uint8_t row, col;
for(col=0; col<4; col++){
for(row=0; row<4; row++){
}
#endif
-static void compress512(void* v, void* m, uint64_t* c, void* salt){
- uint8_t i, j, l;
- uint8_t s[16*16];
- uint8_t k[16];
-
- memcpy(s, v, 16*4); /* load v into state */
- memcpy(s+16*4, m, 16*12); /* load m into state */
-
- memcpy(k, c, 8);
- memset(k+8, 0, 8);
- for(i=0; i<8; ++i){
+static void echo_compress(uint8_t *s, uint8_t iterations, uint64_t *c, void *salt){
+ uint8_t i, j;
+ union {
+ uint8_t v8[16];
+ uint64_t v64[2];
+ } k;
+#if DEBUG
+ uint8_t round=0;
+#endif
+ memcpy(k.v8, c, 8);
+ memset(k.v8+8, 0, 8);
+ do{
/* BIG.SubWords */
#if DEBUG
cli_putstr_P(PSTR("\r\n === ROUND "));
- cli_putc('1'+i);
+ cli_putc('0'+round);
cli_putstr_P(PSTR(" ==="));
- if(i<DEBUG_DEPTH){
+ if(round<DEBUG_DEPTH){
dump_state(s);
}
#endif
- for(j=0; j<16; ++j){
- aes_encrypt_round(s+16*j, k);
- aes_encrypt_round(s+16*j, salt);
- *((uint64_t*)(k)) += 1;
+ for(i=0; i<16; ++i){
+ aes_enc_round((aes_cipher_state_t*)(s+16*i), (aes_roundkey_t*)k.v8);
+ aes_enc_round((aes_cipher_state_t*)(s+16*i), (aes_roundkey_t*)salt);
+ k.v64[0] += 1;
}
#if DEBUG
- if(i<DEBUG_DEPTH){
+ if(round<DEBUG_DEPTH){
cli_putstr_P(PSTR("\r\nAfter SubWords"));
dump_state(s);
}
memcpy(s+INDEX(2, 3), s+INDEX(1, 3), 16);
memcpy(s+INDEX(1, 3), t, 16);
#if DEBUG
- if(i<DEBUG_DEPTH){
+ if(round<DEBUG_DEPTH){
cli_putstr_P(PSTR("\r\nAfter ShiftRows"));
dump_state(s);
}
#endif
/* BIG.MixColumns */
- for(j=0; j<4; j+=1){
- for(l=0; l<16; ++l){
- mixcol(s+j*64+l);
+ for(i=0; i<4; i+=1){
+ for(j=0; j<16; ++j){
+ mixcol(s+i*64+j);
}
}
#if DEBUG
- if(i<DEBUG_DEPTH){
+ if(round<DEBUG_DEPTH){
cli_putstr_P(PSTR("\r\nAfter MixColumns"));
dump_state(s);
}
+ round++;
#endif
- }
+ }while(--iterations);
+
+}
+
+/******************************************************************************/
+
+static void compress512(void *v, void *m, uint64_t *c, void *salt){
+ uint8_t s[16*16];
+ uint8_t i;
+ memcpy(s, v, 16*4); /* load v into state */
+ memcpy(s+16*4, m, 16*12); /* load m into state */
+
+ echo_compress(s, 8, c, salt);
/* BIG.Final */
for(i=0; i<3; ++i){
}
}
-void echo_small_nextBlock(echo_small_ctx_t* ctx, void* block){
+static void compress1024(void *v, void *m, uint64_t *c, void *salt){
+ uint8_t s[16*16];
+ memcpy(s, v, 16*8); /* load v into state */
+ memcpy(s+16*8, m, 16*8); /* load m into state */
+
+ echo_compress(s, 10, c, salt);
+
+ /* BIG.Final */
+ memxor(v, m, 16*8);
+ memxor(v, s, 16*8);
+ memxor(v, s+16*8, 16*8);
+}
+
+/******************************************************************************/
+
+void echo_small_nextBlock(echo_small_ctx_t *ctx, void *block){
ctx->counter += ECHO_SMALL_BLOCKSIZE;
compress512(ctx->v, block, &(ctx->counter), ctx->salt);
}
-void echo_small_lastBlock(echo_small_ctx_t* ctx, void* block, uint16_t length_b){
+void echo_small_lastBlock(echo_small_ctx_t *ctx, void *block, uint16_t length_b){
while(length_b>=ECHO_SMALL_BLOCKSIZE){
echo_small_nextBlock(ctx, block);
block = (uint8_t*)block + ECHO_SMALL_BLOCKSIZE_B;
/******************************************************************************/
-void echo_small_ctx2hash(void* dest, uint16_t length_b, echo_small_ctx_t* ctx){
+void echo_large_nextBlock(echo_large_ctx_t *ctx, void *block){
+ ctx->counter += ECHO_LARGE_BLOCKSIZE;
+ compress1024(ctx->v, block, &(ctx->counter), ctx->salt);
+}
+
+void echo_large_lastBlock(echo_large_ctx_t *ctx, void *block, uint16_t length_b){
+ while(length_b>=ECHO_LARGE_BLOCKSIZE){
+ echo_large_nextBlock(ctx, block);
+ block = (uint8_t*)block + ECHO_LARGE_BLOCKSIZE_B;
+ length_b -= ECHO_LARGE_BLOCKSIZE;
+ }
+ uint8_t buffer[ECHO_LARGE_BLOCKSIZE_B];
+ uint64_t total_len;
+ memset(buffer, 0, ECHO_LARGE_BLOCKSIZE_B);
+ memcpy(buffer, block, (length_b+7)/8);
+ buffer[length_b/8] |= 0x80 >> (length_b&7);
+ total_len = (ctx->counter += length_b);
+ if(length_b>=ECHO_LARGE_BLOCKSIZE-144){
+ compress1024(ctx->v, buffer, &total_len, ctx->salt);
+ memset(buffer, 0, ECHO_LARGE_BLOCKSIZE_B);
+ ctx->counter = 0;
+ }
+ if(length_b==0){
+ ctx->counter = 0;
+ }
+ memcpy(buffer+ECHO_LARGE_BLOCKSIZE_B-18, &(ctx->id), 2);
+ memcpy(buffer+ECHO_LARGE_BLOCKSIZE_B-16, &total_len, 8);
+ compress1024(ctx->v, buffer, &(ctx->counter), ctx->salt);
+}
+/******************************************************************************/
+
+void echo_ctx2hash(void *dest, uint16_t length_b, echo_small_ctx_t *ctx){
memcpy(dest, ctx->v, (length_b+7)/8);
}
-void echo224_ctx2hash(void* dest, echo_small_ctx_t* ctx){
+void echo224_ctx2hash(void *dest, echo_small_ctx_t *ctx){
memcpy(dest, ctx->v, 224/8);
}
-void echo256_ctx2hash(void* dest, echo_small_ctx_t* ctx){
+void echo256_ctx2hash(void *dest, echo_small_ctx_t *ctx){
memcpy(dest, ctx->v, 256/8);
}
/******************************************************************************/
-void echo224_init(echo_small_ctx_t* ctx){
+void echo384_ctx2hash(void *dest, echo_large_ctx_t *ctx){
+ memcpy(dest, ctx->v, 384/8);
+}
+
+void echo512_ctx2hash(void *dest, echo_large_ctx_t *ctx){
+ memcpy(dest, ctx->v, 512/8);
+}
+
+/******************************************************************************/
+
+void echo224_init(echo_small_ctx_t *ctx){
memset(ctx->v, 0, 4*16);
ctx->counter = 0;
memset(ctx->salt, 0, 16);
ctx->v[0+16*3] = 0xE0;
}
-void echo256_init(echo_small_ctx_t* ctx){
+void echo256_init(echo_small_ctx_t *ctx){
memset(ctx->v, 0, 4*16);
ctx->counter = 0;
memset(ctx->salt, 0, 16);
/******************************************************************************/
+void echo384_init(echo_large_ctx_t *ctx){
+ uint8_t i;
+ memset(ctx->v, 0, 8*16);
+ ctx->counter = 0;
+ memset(ctx->salt, 0, 16);
+ ctx->id = 0x0180;
+ for(i=0; i<8; ++i){
+ ctx->v[0+16*i] = 0x80;
+ ctx->v[1+16*i] = 0x01;
+ }
+}
+
+void echo512_init(echo_large_ctx_t *ctx){
+ uint8_t i;
+ memset(ctx->v, 0, 8*16);
+ ctx->counter = 0;
+ memset(ctx->salt, 0, 16);
+ ctx->id = 0x0200;
+ for(i=0; i<8; ++i){
+ ctx->v[1+16*i] = 0x02;
+ }
+}
+
+/******************************************************************************/
projects / avr-crypto-lib.git / blobdiff