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avr-crypto-lib/blake/blake_large.c

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/* blake_large.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_large.c
* \author Daniel Otte
* \email daniel.otte@rub.de
* \date 2009-05-08
* \license GPLv3 or later
*
*/
#include <stdint.h>
#include <string.h>
#include <avr/pgmspace.h>
#include "memxor.h"
#include "blake_large.h"
#include "blake_common.h"
static
uint64_t pgm_read_qword(void* p){
union{
uint64_t v64;
uint32_t v32[2];
}r;
r.v32[0] = pgm_read_dword(p);
r.v32[1] = pgm_read_dword((uint8_t*)p+4);
return r.v64;
}
static
uint64_t blake_c[] PROGMEM = {
0x243F6A8885A308D3LL, 0x13198A2E03707344LL,
0xA4093822299F31D0LL, 0x082EFA98EC4E6C89LL,
0x452821E638D01377LL, 0xBE5466CF34E90C6CLL,
0xC0AC29B7C97C50DDLL, 0x3F84D5B5B5470917LL,
0x9216D5D98979FB1BLL, 0xD1310BA698DFB5ACLL,
0x2FFD72DBD01ADFB7LL, 0xB8E1AFED6A267E96LL,
0xBA7C9045F12C7F99LL, 0x24A19947B3916CF7LL,
0x0801F2E2858EFC16LL, 0x636920D871574E69LL
};
#define ROTL64(a, n) (((a)<<(n))|((a)>>(64-(n))))
#define ROTR64(a, n) (((a)>>(n))|((a)<<(64-(n))))
#define CHANGE_ENDIAN32(a) (((a)<<24)| \
((0x0000ff00&(a))<<8)| \
((0x00ff0000&(a))>>8)| \
(a)>>24 )
static
void blake_large_expand(uint64_t* v, const blake_large_ctx_t* ctx){
uint8_t i;
memcpy(v, ctx->h, 8*8);
for(i=0; i<8; ++i){
v[8+i] = pgm_read_qword(&(blake_c[i]));
}
memxor((uint8_t*)v+8, ctx->s, 4*8);
}
static
void blake_large_changeendian(void* dest, const void* src){
uint8_t i;
uint32_t tmp;
for(i=0; i<32; i+=2){
tmp = CHANGE_ENDIAN32(((uint32_t*)src)[i]);
((uint32_t*)dest)[i] = CHANGE_ENDIAN32(((uint32_t*)src)[i+1]);
((uint32_t*)dest)[i+1] = tmp;
}
}
static
void blake_large_compress(uint64_t* v,const void* m){
uint8_t r,i;
uint8_t a,b,c,d, s0, s1;
for(r=0; r<14; ++r){
for(i=0; i<8; ++i){
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);
v[a] += v[b] + (((uint64_t*)m)[s0] ^ pgm_read_qword(&(blake_c[s1])));
v[d] = ROTR64(v[d]^v[a], 32);
v[c] += v[d];
v[b] = ROTR64(v[b]^v[c], 25);
v[a] += v[b] + (((uint64_t*)m)[s1] ^ pgm_read_qword(&(blake_c[s0])));
v[d] = ROTR64(v[d]^v[a], 16);
v[c] += v[d];
v[b] = ROTR64(v[b]^v[c], 11);
}
}
}
static
void blake_large_collapse(blake_large_ctx_t* ctx, uint64_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_large_nextBlock(blake_large_ctx_t* ctx, const void* msg){
uint64_t v[16];
uint64_t m[16];
union {
uint64_t v64;
uint32_t v32[2];
}ctr;
blake_large_expand(v,ctx);
ctx->counter++;
ctr.v64 = ctx->counter*1024;
v[12] ^= ctr.v64;
v[13] ^= ctr.v64;
blake_large_changeendian(m, msg);
blake_large_compress(v, m);
blake_large_collapse(ctx, v);
}
void blake_large_lastBlock(blake_large_ctx_t* ctx, const void* msg, uint16_t length_b){
while(length_b>=BLAKE_LARGE_BLOCKSIZE){
blake_large_nextBlock(ctx, msg);
msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
length_b -= BLAKE_LARGE_BLOCKSIZE;
}
uint8_t buffer[128];
uint64_t v[16];
uint64_t ctr;
ctr = ctx->counter*1024+length_b;
memset(buffer, 0, 128);
memcpy(buffer, msg, (length_b+7)/8);
buffer[length_b/8] |= 0x80 >> (length_b&0x7);
blake_large_changeendian(buffer, buffer);
blake_large_expand(v, ctx);
if(length_b>1024-128-2){
v[12] ^= ctr;
v[13] ^= ctr;
blake_large_compress(v, buffer);
blake_large_collapse(ctx, v);
memset(buffer, 0, 128-8);
blake_large_expand(v, ctx);
} else {
if(length_b){
v[12] ^= ctr;
v[13] ^= ctr;
}
}
if(ctx->appendone)
buffer[128-16-8] |= 0x01;
*((uint64_t*)(&(buffer[128-8]))) = ctr;
blake_large_compress(v, buffer);
blake_large_collapse(ctx, v);
}
uint64_t blake64_iv[] PROGMEM = {
0x6A09E667F3BCC908LL, 0xBB67AE8584CAA73BLL,
0x3C6EF372FE94F82BLL, 0xA54FF53A5F1D36F1LL,
0x510E527FADE682D1LL, 0x9B05688C2B3E6C1FLL,
0x1F83D9ABFB41BD6BLL, 0x5BE0CD19137E2179LL
};
void blake64_init(blake64_ctx_t* ctx){
uint8_t i;
for(i=0; i<8; ++i){
ctx->h[i] = pgm_read_qword(&(blake64_iv[i]));
}
memset(ctx->s, 0, 4*8);
ctx->counter = 0;
ctx->appendone = 1;
}
uint64_t blake48_iv[] PROGMEM = {
0xCBBB9D5DC1059ED8LL, 0x629A292A367CD507LL,
0x9159015A3070DD17LL, 0x152FECD8F70E5939LL,
0x67332667FFC00B31LL, 0x8EB44A8768581511LL,
0xDB0C2E0D64F98FA7LL, 0x47B5481DBEFA4FA4LL
};
void blake48_init(blake48_ctx_t* ctx){
uint8_t i;
for(i=0; i<8; ++i){
ctx->h[i] = pgm_read_qword(&(blake48_iv[i]));
}
memset(ctx->s, 0, 4*8);
ctx->counter = 0;
ctx->appendone = 0;
}
void blake64_ctx2hash(void* dest, const blake64_ctx_t* ctx){
uint8_t i;
for(i=0; i<8; ++i){
((uint32_t*)dest)[2*i+0] = CHANGE_ENDIAN32((ctx->h[i])>>32);
((uint32_t*)dest)[2*i+1] = CHANGE_ENDIAN32((uint32_t)ctx->h[i]);
}
}
void blake48_ctx2hash(void* dest, const blake48_ctx_t* ctx){
uint8_t i;
for(i=0; i<6; ++i){
((uint32_t*)dest)[2*i+0] = CHANGE_ENDIAN32((ctx->h[i])>>32);
((uint32_t*)dest)[2*i+1] = CHANGE_ENDIAN32((uint32_t)ctx->h[i]);
}
}
void blake64_nextBlock(blake64_ctx_t* ctx, const void* block){
blake_large_nextBlock(ctx, block);
}
void blake48_nextBlock(blake48_ctx_t* ctx, const void* block){
blake_large_nextBlock(ctx, block);
}
void blake64_lastBlock(blake64_ctx_t* ctx, const void* block, uint16_t length_b){
blake_large_lastBlock(ctx, block, length_b);
}
void blake48_lastBlock(blake48_ctx_t* ctx, const void* block, uint16_t length_b){
blake_large_lastBlock(ctx, block, length_b);
}
void blake64(void* dest, const void* msg, uint32_t length_b){
blake_large_ctx_t ctx;
blake64_init(&ctx);
while(length_b>=BLAKE_LARGE_BLOCKSIZE){
blake_large_nextBlock(&ctx, msg);
msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
length_b -= BLAKE_LARGE_BLOCKSIZE;
}
blake_large_lastBlock(&ctx, msg, length_b);
blake64_ctx2hash(dest, &ctx);
}
void blake48(void* dest, const void* msg, uint32_t length_b){
blake_large_ctx_t ctx;
blake48_init(&ctx);
while(length_b>=BLAKE_LARGE_BLOCKSIZE){
blake_large_nextBlock(&ctx, msg);
msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
length_b -= BLAKE_LARGE_BLOCKSIZE;
}
blake_large_lastBlock(&ctx, msg, length_b);
blake48_ctx2hash(dest, &ctx);
}
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