/* cubehash.c */
/*
- This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2008 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/>.
-*/
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2008 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 cubehash.c
* \email daniel.otte@rub.de
*
*/
-
#include "memxor.h"
#include "cubehash.h"
#include "cubehash_rotates.h"
#include <stdint.h>
/*
-• Add x_0jklm into x_1jklm modulo 2**32 , for each (j, k, l, m).
-• Rotate x_0jklm upwards by 7 bits, for each (j, k, l, m).
-• Swap x_00klm with x_01klm , for each (k, l, m).
-• Xor x_1jklm into x_0jklm , for each (j, k, l, m).
-• Swap x_1jk0m with x_1jk1m , for each (j, k, m).
-• Add x_0jklm into x_1jklm modulo 2**32 , for each (j, k, l, m).
-• Rotate x_0jklm upwards by 11 bits, for each (j, k, l, m).
-• Swap x_0j0lm with x_0j1lm , for each (j, l, m).
-• Xor x_1jklm into x_0jklm , for each (j, k, l, m).
-• Swap x_1jkl0 with x_1jkl1 , for each (j, k, l).
-*/
-
-static void cubehash_round(cubehash_ctx_t *ctx){
- uint8_t i;
- uint32_t t, t2;
- for(i=0; i<16; ++i){
- ctx->a[i+16] += t = ctx->a[i];
- ctx->a[i] = rotate7left(t);
- }
- xchg32_array(&(ctx->a[0]), &(ctx->a[8]), 8);
- for(i=0; i<16; i+=4){
- t = ctx->a[i+16];
- t2 = ctx->a[i] ^= t;
- ctx->a[i+16] = ctx->a[i+18] + t2;
- ctx->a[i] = rotate11left(t2);
- t2 = ctx->a[i+2] ^= ctx->a[i+18];
- ctx->a[i+18] = t + t2;
- ctx->a[i+2] = rotate11left(t2);
- t = ctx->a[i+17];
- t2 = ctx->a[i+1] ^= t;
- ctx->a[i+17] = ctx->a[i+19] + t2;
- ctx->a[i+1] = rotate11left(t2);
- t2 = ctx->a[i+3] ^= ctx->a[i+19];
- ctx->a[i+19] = t + t2;
- ctx->a[i+3] = rotate11left(t2);
- }
- xchg32_array(&(ctx->a[0]), &(ctx->a[4]), 4);
- xchg32_array(&(ctx->a[8]), &(ctx->a[12]), 4);
- for(i=0; i<16; i+=2){
- ctx->a[i] ^= t = ctx->a[i+16];
- ctx->a[i+1] ^= ctx->a[i+16] = ctx->a[i+17];
- ctx->a[i+17] = t;
- }
+ • Add x_0jklm into x_1jklm modulo 2**32 , for each (j, k, l, m).
+ • Rotate x_0jklm upwards by 7 bits, for each (j, k, l, m).
+ • Swap x_00klm with x_01klm , for each (k, l, m).
+ • Xor x_1jklm into x_0jklm , for each (j, k, l, m).
+ • Swap x_1jk0m with x_1jk1m , for each (j, k, m).
+ • Add x_0jklm into x_1jklm modulo 2**32 , for each (j, k, l, m).
+ • Rotate x_0jklm upwards by 11 bits, for each (j, k, l, m).
+ • Swap x_0j0lm with x_0j1lm , for each (j, l, m).
+ • Xor x_1jklm into x_0jklm , for each (j, k, l, m).
+ • Swap x_1jkl0 with x_1jkl1 , for each (j, k, l).
+ */
+
+static void cubehash_round(cubehash_ctx_t *ctx)
+{
+ uint8_t i;
+ uint32_t t, t2;
+ for (i = 0; i < 16; ++i) {
+ ctx->a[i + 16] += t = ctx->a[i];
+ ctx->a[i] = rotate7left(t);
+ }
+ xchg32_array(&(ctx->a[0]), &(ctx->a[8]), 8);
+ for (i = 0; i < 16; i += 4) {
+ t = ctx->a[i + 16];
+ t2 = ctx->a[i] ^= t;
+ ctx->a[i + 16] = ctx->a[i + 18] + t2;
+ ctx->a[i] = rotate11left(t2);
+ t2 = ctx->a[i + 2] ^= ctx->a[i + 18];
+ ctx->a[i + 18] = t + t2;
+ ctx->a[i + 2] = rotate11left(t2);
+ t = ctx->a[i + 17];
+ t2 = ctx->a[i + 1] ^= t;
+ ctx->a[i + 17] = ctx->a[i + 19] + t2;
+ ctx->a[i + 1] = rotate11left(t2);
+ t2 = ctx->a[i + 3] ^= ctx->a[i + 19];
+ ctx->a[i + 19] = t + t2;
+ ctx->a[i + 3] = rotate11left(t2);
+ }
+ xchg32_array(&(ctx->a[0]), &(ctx->a[4]), 4);
+ xchg32_array(&(ctx->a[8]), &(ctx->a[12]), 4);
+ for (i = 0; i < 16; i += 2) {
+ ctx->a[i] ^= t = ctx->a[i + 16];
+ ctx->a[i + 1] ^= ctx->a[i + 16] = ctx->a[i + 17];
+ ctx->a[i + 17] = t;
+ }
}
-void cubehash_init(uint8_t r, uint8_t b, uint16_t h, cubehash_ctx_t *ctx){
- memset(ctx->a, 0, 32*4);
- ctx->a[0] = h/8;
- ctx->a[1] = b;
- ctx->a[2] = r;
- ctx->rounds = r;
- ctx->blocksize_B = b;
- for(b=0; b<10*r; ++b){
- cubehash_round(ctx);
- }
+void cubehash_init(uint8_t r, uint8_t b, uint16_t h, cubehash_ctx_t *ctx)
+{
+ memset(ctx->a, 0, 32 * 4);
+ ctx->a[0] = h / 8;
+ ctx->a[1] = b;
+ ctx->a[2] = r;
+ ctx->rounds = r;
+ ctx->blocksize_B = b;
+ for (b = 0; b < 10 * r; ++b) {
+ cubehash_round(ctx);
+ }
}
-void cubehash_nextBlock(cubehash_ctx_t *ctx, void *block){
- uint8_t i;
- memxor(ctx->a, block, ctx->blocksize_B);
- for(i=0; i<ctx->rounds; ++i){
- cubehash_round(ctx);
- }
+void cubehash_nextBlock(cubehash_ctx_t *ctx, void *block)
+{
+ uint8_t i;
+ memxor(ctx->a, block, ctx->blocksize_B);
+ for (i = 0; i < ctx->rounds; ++i) {
+ cubehash_round(ctx);
+ }
}
-void cubehash_lastBlock(cubehash_ctx_t *ctx, void *block, uint16_t length_b){
- while(length_b>=ctx->blocksize_B*8){
- cubehash_nextBlock(ctx, block);
- block = (uint8_t*)block + ctx->blocksize_B;
- length_b -= ctx->blocksize_B*8;
- }
- uint8_t buffer[ctx->blocksize_B];
- uint8_t i;
- memset(buffer, 0, ctx->blocksize_B);
- memcpy(buffer, block, (length_b+7)/8);
- buffer[length_b/8] |= 0x80 >> (length_b&7);
- cubehash_nextBlock(ctx, buffer);
- ctx->a[31] ^= 1;
- for(i=0; i<10*(ctx->rounds); ++i){
- cubehash_round(ctx);
- }
+void cubehash_lastBlock(cubehash_ctx_t *ctx, void *block, uint16_t length_b)
+{
+ while (length_b >= ctx->blocksize_B * 8) {
+ cubehash_nextBlock(ctx, block);
+ block = (uint8_t*) block + ctx->blocksize_B;
+ length_b -= ctx->blocksize_B * 8;
+ }
+ uint8_t buffer[ctx->blocksize_B];
+ uint8_t i;
+ memset(buffer, 0, ctx->blocksize_B);
+ memcpy(buffer, block, (length_b + 7) / 8);
+ buffer[length_b / 8] |= 0x80 >> (length_b & 7);
+ cubehash_nextBlock(ctx, buffer);
+ ctx->a[31] ^= 1;
+ for (i = 0; i < 10 * (ctx->rounds); ++i) {
+ cubehash_round(ctx);
+ }
}
-void cubehash_ctx2hash(void *dest, uint16_t length_b, cubehash_ctx_t *ctx){
- memcpy(dest, ctx->a, (length_b+7)/8);
+void cubehash_ctx2hash(void *dest, uint16_t length_b, cubehash_ctx_t *ctx)
+{
+ memcpy(dest, ctx->a, (length_b + 7) / 8);
}
/******************************************************************************/
-void cubehash224_init(cubehash_ctx_t *ctx){
- cubehash_init(16, 32, 224, ctx);
+void cubehash224_init(cubehash_ctx_t *ctx)
+{
+ cubehash_init(16, 32, 224, ctx);
}
-void cubehash224_ctx2hash(void *dest, cubehash_ctx_t *ctx){
- cubehash_ctx2hash(dest, 224, ctx);
+void cubehash224_ctx2hash(void *dest, cubehash_ctx_t *ctx)
+{
+ cubehash_ctx2hash(dest, 224, ctx);
}
/******************************************************************************/
-void cubehash256_init(cubehash_ctx_t *ctx){
- cubehash_init(16, 32, 256, ctx);
+void cubehash256_init(cubehash_ctx_t *ctx)
+{
+ cubehash_init(16, 32, 256, ctx);
}
-void cubehash256_ctx2hash(void *dest, cubehash_ctx_t *ctx){
- cubehash_ctx2hash(dest, 256, ctx);
+void cubehash256_ctx2hash(void *dest, cubehash_ctx_t *ctx)
+{
+ cubehash_ctx2hash(dest, 256, ctx);
}
/******************************************************************************/
-void cubehash384_init(cubehash_ctx_t *ctx){
- cubehash_init(16, 32, 384, ctx);
+void cubehash384_init(cubehash_ctx_t *ctx)
+{
+ cubehash_init(16, 32, 384, ctx);
}
-void cubehash384_ctx2hash(void *dest, cubehash_ctx_t *ctx){
- cubehash_ctx2hash(dest, 384, ctx);
+void cubehash384_ctx2hash(void *dest, cubehash_ctx_t *ctx)
+{
+ cubehash_ctx2hash(dest, 384, ctx);
}
/******************************************************************************/
-void cubehash512_init(cubehash_ctx_t *ctx){
- cubehash_init(16, 32, 512, ctx);
+void cubehash512_init(cubehash_ctx_t *ctx)
+{
+ cubehash_init(16, 32, 512, ctx);
}
-void cubehash512_ctx2hash(void *dest, cubehash_ctx_t *ctx){
- cubehash_ctx2hash(dest, 512, ctx);
+void cubehash512_ctx2hash(void *dest, cubehash_ctx_t *ctx)
+{
+ cubehash_ctx2hash(dest, 512, ctx);
}
projects / avr-crypto-lib.git / blobdiff