267 lines
6.3 KiB
C
267 lines
6.3 KiB
C
/* blake_small.c */
|
|
/*
|
|
This file is part of the ARM-Crypto-Lib.
|
|
Copyright (C) 2006-2010 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 "memxor.h"
|
|
#include "blake_small.h"
|
|
#include "blake_common.h"
|
|
|
|
static const
|
|
uint32_t blake_c[] = {
|
|
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 )
|
|
static
|
|
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] = blake_c[i];
|
|
}
|
|
memxor((uint8_t*)v+8, ctx->s, 4*4);
|
|
|
|
}
|
|
|
|
static
|
|
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]);
|
|
}
|
|
}
|
|
|
|
#define A (v[idx.v8[0]])
|
|
#define B (v[idx.v8[1]])
|
|
#define C (v[idx.v8[2]])
|
|
#define D (v[idx.v8[3]])
|
|
|
|
static
|
|
void blake_small_compress(uint32_t* v,const void* m){
|
|
uint8_t r,i;
|
|
uint16_t s, *p=(uint16_t*)blake_sigma;
|
|
union {
|
|
uint32_t v32;
|
|
uint8_t v8[4];
|
|
} idx;
|
|
for(r=0; r<14; ++r){
|
|
for(i=0; i<8; ++i){
|
|
idx.v32 = ((uint32_t*)blake_index_lut)[i];
|
|
s = *p++;
|
|
if(p==(uint16_t*)(blake_sigma+160)){
|
|
p=(uint16_t*)blake_sigma;
|
|
}
|
|
A += B + (((uint32_t*)m)[s&0xff] ^ blake_c[s>>8]);
|
|
D = ROTR32(A^D, 16);
|
|
C += D;
|
|
B = ROTR32(B^C, 12);
|
|
A += B + (((uint32_t*)m)[s>>8] ^ blake_c[s&0xff]);
|
|
D = ROTR32(A^D, 8);
|
|
C += D;
|
|
B = ROTR32(B^C, 7);
|
|
}
|
|
}
|
|
}
|
|
|
|
static
|
|
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;
|
|
}
|
|
union {
|
|
uint8_t v8[64];
|
|
uint32_t v32[16];
|
|
uint64_t v64[ 8];
|
|
} buffer;
|
|
uint32_t v[16];
|
|
union {
|
|
uint64_t v64;
|
|
uint32_t v32[2];
|
|
}ctr;
|
|
ctr.v64 = ctx->counter*512+length_b;
|
|
memset(buffer.v8, 0, 64);
|
|
memcpy(buffer.v8, msg, (length_b+7)/8);
|
|
buffer.v8[length_b/8] |= 0x80 >> (length_b&0x7);
|
|
blake_small_changeendian(buffer.v8, buffer.v8);
|
|
blake_small_expand(v, ctx);
|
|
if(length_b>512-64-2){
|
|
v[12] ^= ctr.v32[0];
|
|
v[13] ^= ctr.v32[0];
|
|
v[14] ^= ctr.v32[1];
|
|
v[15] ^= ctr.v32[1];
|
|
blake_small_compress(v, buffer.v8);
|
|
blake_small_collapse(ctx, v);
|
|
memset(buffer.v8, 0, 64-8);
|
|
blake_small_expand(v, ctx);
|
|
}else{
|
|
if(length_b){
|
|
v[12] ^= ctr.v32[0];
|
|
v[13] ^= ctr.v32[0];
|
|
v[14] ^= ctr.v32[1];
|
|
v[15] ^= ctr.v32[1];
|
|
}
|
|
}
|
|
if(ctx->appendone)
|
|
buffer.v8[64-8-4] |= 0x01;
|
|
buffer.v32[14] = ctr.v32[1];
|
|
buffer.v32[15] = ctr.v32[0];
|
|
blake_small_compress(v, buffer.v8);
|
|
blake_small_collapse(ctx, v);
|
|
|
|
}
|
|
|
|
static const
|
|
uint32_t blake256_iv[] = {
|
|
0x6A09E667L, 0xBB67AE85,
|
|
0x3C6EF372L, 0xA54FF53A,
|
|
0x510E527FL, 0x9B05688C,
|
|
0x1F83D9ABL, 0x5BE0CD19
|
|
};
|
|
|
|
void blake256_init(blake256_ctx_t* ctx){
|
|
uint8_t i;
|
|
for(i=0; i<8; ++i){
|
|
ctx->h[i] = blake256_iv[i];
|
|
}
|
|
memset(ctx->s, 0, 4*4);
|
|
ctx->counter = 0;
|
|
ctx->appendone = 1;
|
|
}
|
|
|
|
static const
|
|
uint32_t blake224_iv[] = {
|
|
0xC1059ED8, 0x367CD507,
|
|
0x3070DD17, 0xF70E5939,
|
|
0xFFC00B31, 0x68581511,
|
|
0x64F98FA7, 0xBEFA4FA4
|
|
};
|
|
|
|
void blake224_init(blake224_ctx_t* ctx){
|
|
uint8_t i;
|
|
for(i=0; i<8; ++i){
|
|
ctx->h[i] = blake224_iv[i];
|
|
}
|
|
memset(ctx->s, 0, 4*4);
|
|
ctx->counter = 0;
|
|
ctx->appendone = 0;
|
|
}
|
|
|
|
void blake256_ctx2hash(void* dest, const blake256_ctx_t* ctx){
|
|
uint8_t i;
|
|
for(i=0; i<8; ++i){
|
|
((uint32_t*)dest)[i] = CHANGE_ENDIAN32(ctx->h[i]);
|
|
}
|
|
}
|
|
|
|
void blake224_ctx2hash(void* dest, const blake224_ctx_t* ctx){
|
|
uint8_t i;
|
|
for(i=0; i<7; ++i){
|
|
((uint32_t*)dest)[i] = CHANGE_ENDIAN32(ctx->h[i]);
|
|
}
|
|
}
|
|
|
|
void blake256_nextBlock(blake256_ctx_t* ctx, const void* block){
|
|
blake_small_nextBlock(ctx, block);
|
|
}
|
|
|
|
void blake224_nextBlock(blake224_ctx_t* ctx, const void* block){
|
|
blake_small_nextBlock(ctx, block);
|
|
}
|
|
|
|
void blake256_lastBlock(blake256_ctx_t* ctx, const void* block, uint16_t length_b){
|
|
blake_small_lastBlock(ctx, block, length_b);
|
|
}
|
|
|
|
void blake224_lastBlock(blake224_ctx_t* ctx, const void* block, uint16_t length_b){
|
|
blake_small_lastBlock(ctx, block, length_b);
|
|
}
|
|
|
|
void blake256(void* dest, const void* msg, uint32_t length_b){
|
|
blake_small_ctx_t ctx;
|
|
blake256_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);
|
|
blake256_ctx2hash(dest, &ctx);
|
|
}
|
|
|
|
void blake224(void* dest, const void* msg, uint32_t length_b){
|
|
blake_small_ctx_t ctx;
|
|
blake224_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);
|
|
blake224_ctx2hash(dest, &ctx);
|
|
}
|