#include <stdint.h>
#include <stdlib.h>
#include <string.h>
-#include <avr/pgmspace.h>
#include "memxor.h"
-#include "rotate64.h"
#include "keccak.h"
-#include "stdio.h"
-#ifdef DEBUG
-# undef DEBUG
-#endif
-
-#define DEBUG 0
-
-#if DEBUG
-#include "cli.h"
-
-void keccak_dump_state(uint64_t a[5][5]){
- uint8_t i,j;
- for(i=0; i<5; ++i){
- cli_putstr_P(PSTR("\r\n"));
- cli_putc('0'+i);
- cli_putstr_P(PSTR(": "));
- for(j=0; j<5; ++j){
- cli_hexdump_rev(&(a[i][j]), 8);
- cli_putc(' ');
- }
- }
-}
-
-void keccak_dump_ctx(keccak_ctx_t* ctx){
- keccak_dump_state(ctx->a);
- cli_putstr_P(PSTR("\r\nDBG: r: "));
- cli_hexdump_rev(&(ctx->r), 2);
- cli_putstr_P(PSTR("\t c: "));
- cli_hexdump_rev(&(ctx->c), 2);
- cli_putstr_P(PSTR("\t d: "));
- cli_hexdump(&(ctx->d), 1);
- cli_putstr_P(PSTR("\t bs: "));
- cli_hexdump(&(ctx->bs), 1);
-}
-
-#endif
-
-
-const uint8_t keccak_rc_comp[] PROGMEM = {
- 0x01, 0x92, 0xda, 0x70,
- 0x9b, 0x21, 0xf1, 0x59,
- 0x8a, 0x88, 0x39, 0x2a,
- 0xbb, 0xcb, 0xd9, 0x53,
- 0x52, 0xc0, 0x1a, 0x6a,
- 0xf1, 0xd0, 0x21, 0x78,
-};
-
-const uint8_t keccak_rotate_codes[5][5] PROGMEM = {
- { ROT_CODE( 0), ROT_CODE( 1), ROT_CODE(62), ROT_CODE(28), ROT_CODE(27) },
- { ROT_CODE(36), ROT_CODE(44), ROT_CODE( 6), ROT_CODE(55), ROT_CODE(20) },
- { ROT_CODE( 3), ROT_CODE(10), ROT_CODE(43), ROT_CODE(25), ROT_CODE(39) },
- { ROT_CODE(41), ROT_CODE(45), ROT_CODE(15), ROT_CODE(21), ROT_CODE( 8) },
- { ROT_CODE(18), ROT_CODE( 2), ROT_CODE(61), ROT_CODE(56), ROT_CODE(14) }
-};
-
-void keccak_f1600(uint64_t a[5][5]);
-
-void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
- memxor(ctx->a, block, ctx->bs);
- keccak_f1600(ctx->a);
-}
+void keccak_f1600(uint8_t a[200]);
void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
- while(length_b >= ctx->r){
- keccak_nextBlock(ctx, block);
- block = (uint8_t*)block + ctx->bs;
- length_b -= ctx->r;
- }
- memxor(ctx->a, block, (length_b)/8);
- /* appand 1 */
- if(length_b & 7){
- /* we have some single bits */
- uint8_t t;
- t = ((uint8_t*)block)[length_b / 8] >> (8 - (length_b & 7));
- t |= 0x01 << (length_b & 7);
- ((uint8_t*)ctx->a)[length_b / 8] ^= t;
- }else{
- ((uint8_t*)ctx->a)[length_b / 8] ^= 0x01;
- }
- if(length_b / 8 + 1 + 3 <= ctx->bs){
- *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
- *((uint8_t*)ctx->a + length_b / 8 + 2) ^= ctx->bs;
- *((uint8_t*)ctx->a + length_b / 8 + 3) ^= 1;
- }else{
- if(length_b / 8 + 1 + 2 <= ctx->bs){
- *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
- *((uint8_t*)ctx->a + length_b / 8 + 2) ^= ctx->bs;
- keccak_f1600(ctx->a);
- ((uint8_t*)ctx->a)[0] ^= 0x01;
- }else{
- if(length_b/8+1+1 <= ctx->bs){
- *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
- keccak_f1600(ctx->a);
- ((uint8_t*)ctx->a)[0] ^= ctx->bs;
- ((uint8_t*)ctx->a)[1] ^= 0x01;
- }else{
- keccak_f1600(ctx->a);
- ((uint8_t*)ctx->a)[0] ^= ctx->d;
- ((uint8_t*)ctx->a)[1] ^= ctx->bs;
- ((uint8_t*)ctx->a)[2] ^= 0x01;
- }
- }
- }
- keccak_f1600(ctx->a);
+ uint8_t length_B;
+ while(length_b >= ctx->r){
+ keccak_nextBlock(ctx, block);
+ block = (uint8_t*)block + ctx->bs;
+ length_b -= ctx->r;
+ }
+ length_B = length_b / 8;
+ memxor(ctx->a, block, length_B);
+ /* append 1 */
+ if(length_b & 7){
+ /* we have some single bits */
+ uint8_t t;
+ t = ((uint8_t*)block)[length_B] >> (8 - (length_b & 7));
+ t |= 0x01 << (length_b & 7);
+ ctx->a[length_B] ^= t;
+ }else{
+ ctx->a[length_B] ^= 0x01;
+ }
+ if(length_b == ctx->r - 1){
+ keccak_f1600(ctx->a);
+ }
+ ctx->a[ctx->bs - 1] ^= 0x80;
+ keccak_f1600(ctx->a);
}
-void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
- while(length_b>=ctx->r){
- memcpy(dest, ctx->a, ctx->bs);
- dest = (uint8_t*)dest + ctx->bs;
- length_b -= ctx->r;
- keccak_f1600(ctx->a);
- }
- memcpy(dest, ctx->a, (length_b+7)/8);
-}
-
-void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
- keccak_ctx2hash(dest, 224, ctx);
-}
-void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
- keccak_ctx2hash(dest, 256, ctx);
-}
-
-void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){
- keccak_ctx2hash(dest, 384, ctx);
-}
-
-void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
- keccak_ctx2hash(dest, 512, ctx);
-}
-
-/*
- 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224
- 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256
- 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
- 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
-*/
-void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
- memset(ctx->a, 0x00, 5 * 5 * 8);
- ctx->r = r;
- ctx->c = c;
- ctx->d = d;
- ctx->bs = (uint8_t)(r / 8);
-}
-
-void keccak224_init(keccak_ctx_t* ctx){
- keccak_init(1152, 448, 28, ctx);
-}
-
-void keccak256_init(keccak_ctx_t* ctx){
- keccak_init(1088, 512, 32, ctx);
-}
-
-void keccak384_init(keccak_ctx_t* ctx){
- keccak_init( 832, 768, 48, ctx);
-}
-
-void keccak512_init(keccak_ctx_t* ctx){
- keccak_init( 576, 1024, 64, ctx);
-}
projects / avr-crypto-lib.git / blobdiff