* \email daniel.otte@rub.de
* \date 2009-05-04
* \license GPLv3 or later
- *
+ *
*/
#include <stdint.h>
#include "blake_small.h"
#include "blake_common.h"
-#define BUG_1 1 /* bug compatibility for zero length message */
-#define BUG_2 1 /* bug compatibility for messages of length%512=505...511 */
-
-
+static
uint32_t blake_c[] PROGMEM = {
0x243F6A88, 0x85A308D3,
0x13198A2E, 0x03707344,
((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);
v[8+i] = pgm_read_dword(&(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){
}
}
+static
void blake_small_compress(uint32_t* v,const void* m){
uint8_t r,i;
uint8_t a,b,c,d, s0, s1;
uint32_t lv[4];
for(r=0; r<10; ++r){
for(i=0; i<8; ++i){
- // blake_small_g(r, i, v, (uint32_t*)m);
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);
+
lv[0] = v[a];
lv[1] = v[b];
lv[2] = v[c];
lv[3] = v[d];
-
+
lv[0] += lv[1] + (((uint32_t*)m)[s0] ^ pgm_read_dword(&(blake_c[s1])));
lv[3] = ROTR32(lv[3]^lv[0], 16);
lv[2] += lv[3];
- lv[1] = ROTR32(lv[1]^lv[2], 12);
+ lv[1] = ROTR32(lv[1]^lv[2], 12);
lv[0] += lv[1] + (((uint32_t*)m)[s1] ^ pgm_read_dword(&(blake_c[s0])));
lv[3] = ROTR32(lv[3]^lv[0], 8);
lv[2] += lv[3];
v[b] = lv[1];
v[c] = lv[2];
v[d] = lv[3];
-
}
}
}
+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];
}
uint8_t buffer[64];
uint32_t v[16];
-#if BUG_2
- uint32_t tmp=0;
-#endif
union {
uint64_t v64;
uint32_t v32[2];
}ctr;
ctr.v64 = ctx->counter*512+length_b;
-#if BUG_2
- if(length_b>=505){
- tmp =ctr.v32[0];
- ctr.v32[0] = ctx->counter*512;
- ctr.v32[0] |= 0x40+length_b-504;
- }
-#endif
memset(buffer, 0, 64);
memcpy(buffer, msg, (length_b+7)/8);
- buffer[length_b/8] |= 0x80 >> (length_b%8);
+ buffer[length_b/8] |= 0x80 >> (length_b&0x7);
blake_small_changeendian(buffer, buffer);
blake_small_expand(v, ctx);
- v[12] ^= ctr.v32[0];
- v[13] ^= ctr.v32[0];
- v[14] ^= ctr.v32[1];
- v[15] ^= ctr.v32[1];
-#if BUG_2
- if(length_b>=505)
- ctr.v32[0] = tmp;
-#endif
-#if BUG_1
- if(length_b==0 && ctx->counter==0){
- v[14] ^= 1;
- v[15] ^= 1;
- }
-#endif
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);
blake_small_collapse(ctx, v);
memset(buffer, 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[64-8-4] |= 0x01;
+ buffer[64-8-4] |= 0x01;
*((uint32_t*)(&(buffer[64-8]))) = ctr.v32[1];
*((uint32_t*)(&(buffer[64-4]))) = ctr.v32[0];
blake_small_compress(v, buffer);
blake_small_collapse(ctx, v);
-
+
}
uint32_t blake32_iv[] PROGMEM = {