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tblake2s-ref.c - dedup - deduplicating backup program
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tblake2s-ref.c (9669B)
---
1 /*
2 BLAKE2 reference source code package - reference C implementations
3
4 Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
5 terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
6 your option. The terms of these licenses can be found at:
7
8 - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
9 - OpenSSL license : https://www.openssl.org/source/license.html
10 - Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
11
12 More information about the BLAKE2 hash function can be found at
13 https://blake2.net.
14 */
15
16 #include <stdint.h>
17 #include <string.h>
18 #include <stdio.h>
19
20 #include "blake2.h"
21 #include "blake2-impl.h"
22
23 static const uint32_t blake2s_IV[8] =
24 {
25 0x6A09E667UL, 0xBB67AE85UL, 0x3C6EF372UL, 0xA54FF53AUL,
26 0x510E527FUL, 0x9B05688CUL, 0x1F83D9ABUL, 0x5BE0CD19UL
27 };
28
29 static const uint8_t blake2s_sigma[10][16] =
30 {
31 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
32 { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 } ,
33 { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 } ,
34 { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 } ,
35 { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 } ,
36 { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 } ,
37 { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 } ,
38 { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 } ,
39 { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 } ,
40 { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0 } ,
41 };
42
43 static void blake2s_set_lastnode( blake2s_state *S )
44 {
45 S->f[1] = (uint32_t)-1;
46 }
47
48 /* Some helper functions, not necessarily useful */
49 static int blake2s_is_lastblock( const blake2s_state *S )
50 {
51 return S->f[0] != 0;
52 }
53
54 static void blake2s_set_lastblock( blake2s_state *S )
55 {
56 if( S->last_node ) blake2s_set_lastnode( S );
57
58 S->f[0] = (uint32_t)-1;
59 }
60
61 static void blake2s_increment_counter( blake2s_state *S, const uint32_t inc )
62 {
63 S->t[0] += inc;
64 S->t[1] += ( S->t[0] < inc );
65 }
66
67 static void blake2s_init0( blake2s_state *S )
68 {
69 size_t i;
70 memset( S, 0, sizeof( blake2s_state ) );
71
72 for( i = 0; i < 8; ++i ) S->h[i] = blake2s_IV[i];
73 }
74
75 /* init2 xors IV with input parameter block */
76 int blake2s_init_param( blake2s_state *S, const blake2s_param *P )
77 {
78 const unsigned char *p = ( const unsigned char * )( P );
79 size_t i;
80
81 blake2s_init0( S );
82
83 /* IV XOR ParamBlock */
84 for( i = 0; i < 8; ++i )
85 S->h[i] ^= load32( &p[i * 4] );
86
87 S->outlen = P->digest_length;
88 return 0;
89 }
90
91
92 /* Sequential blake2s initialization */
93 int blake2s_init( blake2s_state *S, size_t outlen )
94 {
95 blake2s_param P[1];
96
97 /* Move interval verification here? */
98 if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return -1;
99
100 P->digest_length = (uint8_t)outlen;
101 P->key_length = 0;
102 P->fanout = 1;
103 P->depth = 1;
104 store32( &P->leaf_length, 0 );
105 store32( &P->node_offset, 0 );
106 store16( &P->xof_length, 0 );
107 P->node_depth = 0;
108 P->inner_length = 0;
109 /* memset(P->reserved, 0, sizeof(P->reserved) ); */
110 memset( P->salt, 0, sizeof( P->salt ) );
111 memset( P->personal, 0, sizeof( P->personal ) );
112 return blake2s_init_param( S, P );
113 }
114
115 int blake2s_init_key( blake2s_state *S, size_t outlen, const void *key, size_t keylen )
116 {
117 blake2s_param P[1];
118
119 if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return -1;
120
121 if ( !key || !keylen || keylen > BLAKE2S_KEYBYTES ) return -1;
122
123 P->digest_length = (uint8_t)outlen;
124 P->key_length = (uint8_t)keylen;
125 P->fanout = 1;
126 P->depth = 1;
127 store32( &P->leaf_length, 0 );
128 store32( &P->node_offset, 0 );
129 store16( &P->xof_length, 0 );
130 P->node_depth = 0;
131 P->inner_length = 0;
132 /* memset(P->reserved, 0, sizeof(P->reserved) ); */
133 memset( P->salt, 0, sizeof( P->salt ) );
134 memset( P->personal, 0, sizeof( P->personal ) );
135
136 if( blake2s_init_param( S, P ) < 0 ) return -1;
137
138 {
139 uint8_t block[BLAKE2S_BLOCKBYTES];
140 memset( block, 0, BLAKE2S_BLOCKBYTES );
141 memcpy( block, key, keylen );
142 blake2s_update( S, block, BLAKE2S_BLOCKBYTES );
143 secure_zero_memory( block, BLAKE2S_BLOCKBYTES ); /* Burn the key from stack */
144 }
145 return 0;
146 }
147
148 #define G(r,i,a,b,c,d) \
149 do { \
150 a = a + b + m[blake2s_sigma[r][2*i+0]]; \
151 d = rotr32(d ^ a, 16); \
152 c = c + d; \
153 b = rotr32(b ^ c, 12); \
154 a = a + b + m[blake2s_sigma[r][2*i+1]]; \
155 d = rotr32(d ^ a, 8); \
156 c = c + d; \
157 b = rotr32(b ^ c, 7); \
158 } while(0)
159
160 #define ROUND(r) \
161 do { \
162 G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
163 G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
164 G(r,2,v[ 2],v[ 6],v[10],v[14]); \
165 G(r,3,v[ 3],v[ 7],v[11],v[15]); \
166 G(r,4,v[ 0],v[ 5],v[10],v[15]); \
167 G(r,5,v[ 1],v[ 6],v[11],v[12]); \
168 G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
169 G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
170 } while(0)
171
172 static void blake2s_compress( blake2s_state *S, const uint8_t in[BLAKE2S_BLOCKBYTES] )
173 {
174 uint32_t m[16];
175 uint32_t v[16];
176 size_t i;
177
178 for( i = 0; i < 16; ++i ) {
179 m[i] = load32( in + i * sizeof( m[i] ) );
180 }
181
182 for( i = 0; i < 8; ++i ) {
183 v[i] = S->h[i];
184 }
185
186 v[ 8] = blake2s_IV[0];
187 v[ 9] = blake2s_IV[1];
188 v[10] = blake2s_IV[2];
189 v[11] = blake2s_IV[3];
190 v[12] = S->t[0] ^ blake2s_IV[4];
191 v[13] = S->t[1] ^ blake2s_IV[5];
192 v[14] = S->f[0] ^ blake2s_IV[6];
193 v[15] = S->f[1] ^ blake2s_IV[7];
194
195 ROUND( 0 );
196 ROUND( 1 );
197 ROUND( 2 );
198 ROUND( 3 );
199 ROUND( 4 );
200 ROUND( 5 );
201 ROUND( 6 );
202 ROUND( 7 );
203 ROUND( 8 );
204 ROUND( 9 );
205
206 for( i = 0; i < 8; ++i ) {
207 S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
208 }
209 }
210
211 #undef G
212 #undef ROUND
213
214 int blake2s_update( blake2s_state *S, const void *pin, size_t inlen )
215 {
216 const unsigned char * in = (const unsigned char *)pin;
217 if( inlen > 0 )
218 {
219 size_t left = S->buflen;
220 size_t fill = BLAKE2S_BLOCKBYTES - left;
221 if( inlen > fill )
222 {
223 S->buflen = 0;
224 memcpy( S->buf + left, in, fill ); /* Fill buffer */
225 blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
226 blake2s_compress( S, S->buf ); /* Compress */
227 in += fill; inlen -= fill;
228 while(inlen > BLAKE2S_BLOCKBYTES) {
229 blake2s_increment_counter(S, BLAKE2S_BLOCKBYTES);
230 blake2s_compress( S, in );
231 in += BLAKE2S_BLOCKBYTES;
232 inlen -= BLAKE2S_BLOCKBYTES;
233 }
234 }
235 memcpy( S->buf + S->buflen, in, inlen );
236 S->buflen += inlen;
237 }
238 return 0;
239 }
240
241 int blake2s_final( blake2s_state *S, void *out, size_t outlen )
242 {
243 uint8_t buffer[BLAKE2S_OUTBYTES] = {0};
244 size_t i;
245
246 if( out == NULL || outlen < S->outlen )
247 return -1;
248
249 if( blake2s_is_lastblock( S ) )
250 return -1;
251
252 blake2s_increment_counter( S, ( uint32_t )S->buflen );
253 blake2s_set_lastblock( S );
254 memset( S->buf + S->buflen, 0, BLAKE2S_BLOCKBYTES - S->buflen ); /* Padding */
255 blake2s_compress( S, S->buf );
256
257 for( i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
258 store32( buffer + sizeof( S->h[i] ) * i, S->h[i] );
259
260 memcpy( out, buffer, outlen );
261 secure_zero_memory(buffer, sizeof(buffer));
262 return 0;
263 }
264
265 int blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen )
266 {
267 blake2s_state S[1];
268
269 /* Verify parameters */
270 if ( NULL == in && inlen > 0 ) return -1;
271
272 if ( NULL == out ) return -1;
273
274 if ( NULL == key && keylen > 0) return -1;
275
276 if( !outlen || outlen > BLAKE2S_OUTBYTES ) return -1;
277
278 if( keylen > BLAKE2S_KEYBYTES ) return -1;
279
280 if( keylen > 0 )
281 {
282 if( blake2s_init_key( S, outlen, key, keylen ) < 0 ) return -1;
283 }
284 else
285 {
286 if( blake2s_init( S, outlen ) < 0 ) return -1;
287 }
288
289 blake2s_update( S, ( const uint8_t * )in, inlen );
290 blake2s_final( S, out, outlen );
291 return 0;
292 }
293
294 #if defined(SUPERCOP)
295 int crypto_hash( unsigned char *out, unsigned char *in, unsigned long long inlen )
296 {
297 return blake2s( out, BLAKE2S_OUTBYTES, in, inlen, NULL, 0 );
298 }
299 #endif
300
301 #if defined(BLAKE2S_SELFTEST)
302 #include <string.h>
303 #include "blake2-kat.h"
304 int main( void )
305 {
306 uint8_t key[BLAKE2S_KEYBYTES];
307 uint8_t buf[BLAKE2_KAT_LENGTH];
308 size_t i, step;
309
310 for( i = 0; i < BLAKE2S_KEYBYTES; ++i )
311 key[i] = ( uint8_t )i;
312
313 for( i = 0; i < BLAKE2_KAT_LENGTH; ++i )
314 buf[i] = ( uint8_t )i;
315
316 /* Test simple API */
317 for( i = 0; i < BLAKE2_KAT_LENGTH; ++i )
318 {
319 uint8_t hash[BLAKE2S_OUTBYTES];
320 blake2s( hash, BLAKE2S_OUTBYTES, buf, i, key, BLAKE2S_KEYBYTES );
321
322 if( 0 != memcmp( hash, blake2s_keyed_kat[i], BLAKE2S_OUTBYTES ) )
323 {
324 goto fail;
325 }
326 }
327
328 /* Test streaming API */
329 for(step = 1; step < BLAKE2S_BLOCKBYTES; ++step) {
330 for (i = 0; i < BLAKE2_KAT_LENGTH; ++i) {
331 uint8_t hash[BLAKE2S_OUTBYTES];
332 blake2s_state S;
333 uint8_t * p = buf;
334 size_t mlen = i;
335 int err = 0;
336
337 if( (err = blake2s_init_key(&S, BLAKE2S_OUTBYTES, key, BLAKE2S_KEYBYTES)) < 0 ) {
338 goto fail;
339 }
340
341 while (mlen >= step) {
342 if ( (err = blake2s_update(&S, p, step)) < 0 ) {
343 goto fail;
344 }
345 mlen -= step;
346 p += step;
347 }
348 if ( (err = blake2s_update(&S, p, mlen)) < 0) {
349 goto fail;
350 }
351 if ( (err = blake2s_final(&S, hash, BLAKE2S_OUTBYTES)) < 0) {
352 goto fail;
353 }
354
355 if (0 != memcmp(hash, blake2s_keyed_kat[i], BLAKE2S_OUTBYTES)) {
356 goto fail;
357 }
358 }
359 }
360
361 puts( "ok" );
362 return 0;
363 fail:
364 puts("error");
365 return -1;
366 }
367 #endif
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