3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 * \email daniel.otte@rub.de
24 * \license GPLv3 or later
30 #include <avr/pgmspace.h>
32 #include "blake_small.h"
33 #include "blake_common.h"
35 #define BUG_1 0 /* bug compatibility for zero length message */
36 #define BUG_2 0 /* bug compatibility for messages of length%512=505...511 */
39 uint32_t blake_c[] PROGMEM = {
40 0x243F6A88, 0x85A308D3,
41 0x13198A2E, 0x03707344,
42 0xA4093822, 0x299F31D0,
43 0x082EFA98, 0xEC4E6C89,
44 0x452821E6, 0x38D01377,
45 0xBE5466CF, 0x34E90C6C,
46 0xC0AC29B7, 0xC97C50DD,
47 0x3F84D5B5, 0xB5470917
50 #define ROTL32(a, n) (((a)<<(n))|((a)>>(32-(n))))
51 #define ROTR32(a, n) (((a)>>(n))|((a)<<(32-(n))))
52 #define CHANGE_ENDIAN32(a) (((a)<<24)| \
53 ((0x0000ff00&(a))<<8)| \
54 ((0x00ff0000&(a))>>8)| \
57 void blake_small_g(uint8_t r, uint8_t i, uint32_t* v, const uint32_t* m){
58 uint8_t a,b,c,d, s0, s1;
59 a = pgm_read_byte(blake_index_lut+4*i+0);
60 b = pgm_read_byte(blake_index_lut+4*i+1);
61 c = pgm_read_byte(blake_index_lut+4*i+2);
62 d = pgm_read_byte(blake_index_lut+4*i+3);
63 s0 = pgm_read_byte(blake_sigma+16*r+2*i+0);
64 s1 = pgm_read_byte(blake_sigma+16*r+2*i+1);
65 v[a] += v[b] + (m[s0] ^ pgm_read_dword(&(blake_c[s1])));
66 v[d] = ROTR32(v[d]^v[a], 16);
68 v[b] = ROTR32(v[b]^v[c], 12);
69 v[a] += v[b] + (m[s1] ^ pgm_read_dword(&(blake_c[s0])));
70 v[d] = ROTR32(v[d]^v[a], 8);
72 v[b] = ROTR32(v[b]^v[c], 7);
76 void blake_small_expand(uint32_t* v, const blake_small_ctx_t* ctx){
78 memcpy(v, ctx->h, 8*4);
80 v[8+i] = pgm_read_dword(&(blake_c[i]));
82 memxor((uint8_t*)v+8, ctx->s, 4*4);
86 void blake_small_changeendian(void* dest, const void* src){
89 ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(((uint32_t*)src)[i]);
93 void blake_small_compress(uint32_t* v,const void* m){
97 blake_small_g(r, i, v, (uint32_t*)m);
102 void blake_small_collapse(blake_small_ctx_t* ctx, uint32_t* v){
105 ctx->h[i] ^= ctx->s[i%4] ^ v[i] ^ v[8+i];
109 void blake_small_nextBlock(blake_small_ctx_t* ctx, const void* msg){
116 blake_small_expand(v,ctx);
118 ctr.v64 = ctx->counter*512;
123 blake_small_changeendian(m, msg);
124 blake_small_compress(v, m);
125 blake_small_collapse(ctx, v);
128 void blake_small_lastBlock(blake_small_ctx_t* ctx, const void* msg, uint16_t length_b){
129 while(length_b>=BLAKE_SMALL_BLOCKSIZE){
130 blake_small_nextBlock(ctx, msg);
131 msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
132 length_b -= BLAKE_SMALL_BLOCKSIZE;
143 ctr.v64 = ctx->counter*512+length_b;
147 ctr.v32[0] = ctx->counter*512;
148 ctr.v32[0] |= 0x40+length_b-504;
151 memset(buffer, 0, 64);
152 memcpy(buffer, msg, (length_b+7)/8);
153 buffer[length_b/8] |= 0x80 >> (length_b%8);
154 blake_small_changeendian(buffer, buffer);
155 blake_small_expand(v, ctx);
165 if(length_b==0 && ctx->counter==0){
170 if(length_b>512-64-2){
171 blake_small_compress(v, buffer);
172 blake_small_collapse(ctx, v);
173 memset(buffer, 0, 64-8);
174 blake_small_expand(v, ctx);
177 buffer[64-8-4] |= 0x01;
178 *((uint32_t*)(&(buffer[64-8]))) = ctr.v32[1];
179 *((uint32_t*)(&(buffer[64-4]))) = ctr.v32[0];
180 blake_small_compress(v, buffer);
181 blake_small_collapse(ctx, v);
185 uint32_t blake32_iv[] PROGMEM = {
186 0x6A09E667L, 0xBB67AE85,
187 0x3C6EF372L, 0xA54FF53A,
188 0x510E527FL, 0x9B05688C,
189 0x1F83D9ABL, 0x5BE0CD19
192 void blake32_init(blake32_ctx_t* ctx){
195 ctx->h[i] = pgm_read_dword(&(blake32_iv[i]));
197 memset(ctx->s, 0, 4*4);
202 uint32_t blake28_iv[] PROGMEM = {
203 0xC1059ED8, 0x367CD507,
204 0x3070DD17, 0xF70E5939,
205 0xFFC00B31, 0x68581511,
206 0x64F98FA7, 0xBEFA4FA4
209 void blake28_init(blake28_ctx_t* ctx){
212 ctx->h[i] = pgm_read_dword(&(blake28_iv[i]));
214 memset(ctx->s, 0, 4*4);
219 void blake32_ctx2hash(void* dest, const blake32_ctx_t* ctx){
222 ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(ctx->h[i]);
226 void blake28_ctx2hash(void* dest, const blake28_ctx_t* ctx){
229 ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(ctx->h[i]);
233 void blake32_nextBlock(blake32_ctx_t* ctx, const void* block){
234 blake_small_nextBlock(ctx, block);
237 void blake28_nextBlock(blake28_ctx_t* ctx, const void* block){
238 blake_small_nextBlock(ctx, block);
241 void blake32_lastBlock(blake32_ctx_t* ctx, const void* block, uint16_t length_b){
242 blake_small_lastBlock(ctx, block, length_b);
245 void blake28_lastBlock(blake28_ctx_t* ctx, const void* block, uint16_t length_b){
246 blake_small_lastBlock(ctx, block, length_b);
249 void blake32(void* dest, const void* msg, uint32_t length_b){
250 blake_small_ctx_t ctx;
252 while(length_b>=BLAKE_SMALL_BLOCKSIZE){
253 blake_small_nextBlock(&ctx, msg);
254 msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
255 length_b -= BLAKE_SMALL_BLOCKSIZE;
257 blake_small_lastBlock(&ctx, msg, length_b);
258 blake32_ctx2hash(dest, &ctx);
261 void blake28(void* dest, const void* msg, uint32_t length_b){
262 blake_small_ctx_t ctx;
264 while(length_b>=BLAKE_SMALL_BLOCKSIZE){
265 blake_small_nextBlock(&ctx, msg);
266 msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
267 length_b -= BLAKE_SMALL_BLOCKSIZE;
269 blake_small_lastBlock(&ctx, msg, length_b);
270 blake28_ctx2hash(dest, &ctx);