VeraCrypt
aboutsummaryrefslogtreecommitdiff
path: root/src/Crypto/blake2s-ref.c
blob: 435630b9af63c546ca030a6cf74a2527c33ff1e0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
/*
   BLAKE2 reference source code package - reference C implementations

   Copyright 2012, Samuel Neves <sneves@dei.uc.pt>.  You may use this under the
   terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
   your option.  The terms of these licenses can be found at:

   - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
   - OpenSSL license   : https://www.openssl.org/source/license.html
   - Apache 2.0        : http://www.apache.org/licenses/LICENSE-2.0

   More information about the BLAKE2 hash function can be found at
   https://blake2.net.
*/

/* Adapted for VeraCrypt */

#include <stdlib.h>
#include <STRING.H>

#include "blake2.h"

#pragma optimize ("tl", on)

#pragma intrinsic(_lrotr)
#pragma intrinsic( memcpy )
#pragma intrinsic( memset )

static const uint32 blake2s_IV[8] =
{
  0x6A09E667UL, 0xBB67AE85UL, 0x3C6EF372UL, 0xA54FF53AUL,
  0x510E527FUL, 0x9B05688CUL, 0x1F83D9ABUL, 0x5BE0CD19UL
};

static const uint8 blake2s_sigma[10][16] =
{
  {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15 } ,
  { 14, 10,  4,  8,  9, 15, 13,  6,  1, 12,  0,  2, 11,  7,  5,  3 } ,
  { 11,  8, 12,  0,  5,  2, 15, 13, 10, 14,  3,  6,  7,  1,  9,  4 } ,
  {  7,  9,  3,  1, 13, 12, 11, 14,  2,  6,  5, 10,  4,  0, 15,  8 } ,
  {  9,  0,  5,  7,  2,  4, 10, 15, 14,  1, 11, 12,  6,  8,  3, 13 } ,
  {  2, 12,  6, 10,  0, 11,  8,  3,  4, 13,  7,  5, 15, 14,  1,  9 } ,
  { 12,  5,  1, 15, 14, 13,  4, 10,  0,  7,  6,  3,  9,  2,  8, 11 } ,
  { 13, 11,  7, 14, 12,  1,  3,  9,  5,  0, 15,  4,  8,  6,  2, 10 } ,
  {  6, 15, 14,  9, 11,  3,  0,  8, 12,  2, 13,  7,  1,  4, 10,  5 } ,
  { 10,  2,  8,  4,  7,  6,  1,  5, 15, 11,  9, 14,  3, 12, 13 , 0 } ,
};

static void blake2s_set_lastnode( blake2s_state *S )
{
  S->f[1] = (uint32)-1;
}

/* Some helper functions, not necessarily useful */
static int blake2s_is_lastblock( const blake2s_state *S )
{
  return S->f[0] != 0;
}

static void blake2s_set_lastblock( blake2s_state *S )
{
  if( S->last_node ) blake2s_set_lastnode( S );

  S->f[0] = (uint32)-1;
}

static void blake2s_increment_counter( blake2s_state *S, const uint32 inc )
{
  S->t[0] += inc;
  S->t[1] += ( S->t[0] < inc );
}

static void blake2s_init0( blake2s_state *S )
{
  size_t i;
  memset( S, 0, sizeof( blake2s_state ) );

  for( i = 0; i < 8; ++i ) S->h[i] = blake2s_IV[i];
}

/* init2 xors IV with input parameter block */
void blake2s_init_param( blake2s_state *S, const blake2s_param *P )
{
  const unsigned char *p = ( const unsigned char * )( P );
  size_t i;
  uint32 w;

  blake2s_init0( S );

  /* IV XOR ParamBlock */
  for( i = 0; i < 8; ++i )
  {
	memcpy (&w, &p[i * 4], sizeof (w));
    S->h[i] ^= w;
  }

  S->outlen = P->digest_length;
}


/* Sequential blake2s initialization */
void blake2s_init( blake2s_state *S )
{
  blake2s_param P[1];

  P->digest_length = 32;
  P->key_length    = 0;
  P->fanout        = 1;
  P->depth         = 1;
  P->leaf_length = 0;
  P->node_offset = 0;
  P->xof_length = 0;
  P->node_depth    = 0;
  P->inner_length  = 0;
  /* memset(P->reserved, 0, sizeof(P->reserved) ); */
  memset( P->salt,     0, sizeof( P->salt ) );
  memset( P->personal, 0, sizeof( P->personal ) );
  blake2s_init_param( S, P );
}

#ifndef TC_MINIMIZE_CODE_SIZE
#define G(r,i,a,b,c,d)                      \
  do {                                      \
    a = a + b + m[blake2s_sigma[r][2*i+0]]; \
    d = _lrotr(d ^ a, 16);                  \
    c = c + d;                              \
    b = _lrotr(b ^ c, 12);                  \
    a = a + b + m[blake2s_sigma[r][2*i+1]]; \
    d = _lrotr(d ^ a, 8);                   \
    c = c + d;                              \
    b = _lrotr(b ^ c, 7);                   \
  } while(0)

#define ROUND(r)                    \
  do {                              \
    G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
    G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
    G(r,2,v[ 2],v[ 6],v[10],v[14]); \
    G(r,3,v[ 3],v[ 7],v[11],v[15]); \
    G(r,4,v[ 0],v[ 5],v[10],v[15]); \
    G(r,5,v[ 1],v[ 6],v[11],v[12]); \
    G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
    G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
  } while(0)
#else
#define G_BASE(r,i,a,b,c,d)                      \
  do {                                      \
    v[a] = v[a] + v[b] + m[blake2s_sigma[r][2*i+0]]; \
    v[d] = _lrotr(v[d] ^ v[a], 16);                  \
    v[c] = v[c] + v[d];                              \
    v[b] = _lrotr(v[b] ^ v[c], 12);                  \
    v[a] = v[a] + v[b] + m[blake2s_sigma[r][2*i+1]]; \
    v[d] = _lrotr(v[d] ^ v[a], 8);                   \
    v[c] = v[c] + v[d];                              \
    v[b] = _lrotr(v[b] ^ v[c], 7);                   \
  } while(0)

static void G(unsigned char r, unsigned char i, uint32* m, uint32* v, unsigned char a, unsigned char b, unsigned char c, unsigned char d)
{
	G_BASE(r,i,a,b,c,d);
}

static void round_base (unsigned char r, uint32* m, uint32* v)
{
	G(r,0,m,v, 0, 4, 8, 12);
	G(r,1,m,v, 1, 5, 9,13);
	G(r,2,m,v, 2, 6,10,14);
	G(r,3,m,v, 3, 7,11,15);
	G(r,4,m,v, 0, 5,10,15);
	G(r,5,m,v, 1, 6,11,12);
	G(r,6,m,v, 2, 7, 8,13);
	G(r,7,m,v, 3, 4, 9,14);
}

#define ROUND(r)  round_base(r,m,v)
#endif
static void blake2s_compress( blake2s_state *S, const uint8 in[BLAKE2S_BLOCKBYTES] )
{
  uint32 m[16];
  uint32 v[16];
  int i;

  for( i = 0; i < 16; ++i ) {
	memcpy (&m[i], in + i * sizeof( m[i] ), sizeof(uint32));
  }

  for( i = 0; i < 8; ++i ) {
    v[i] = S->h[i];
  }

  v[ 8] = blake2s_IV[0];
  v[ 9] = blake2s_IV[1];
  v[10] = blake2s_IV[2];
  v[11] = blake2s_IV[3];
  v[12] = S->t[0] ^ blake2s_IV[4];
  v[13] = S->t[1] ^ blake2s_IV[5];
  v[14] = S->f[0] ^ blake2s_IV[6];
  v[15] = S->f[1] ^ blake2s_IV[7];

  ROUND( 0 );
  ROUND( 1 );
  ROUND( 2 );
  ROUND( 3 );
  ROUND( 4 );
  ROUND( 5 );
  ROUND( 6 );
  ROUND( 7 );
  ROUND( 8 );
  ROUND( 9 );

  for( i = 0; i < 8; ++i ) {
    S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
  }
}

#undef G
#undef ROUND

void blake2s_update( blake2s_state *S, const void *pin, size_t inlen )
{
  const unsigned char * in = (const unsigned char *)pin;
  if( inlen > 0 )
  {
    size_t left = S->buflen;
    size_t fill = BLAKE2S_BLOCKBYTES - left;
    if( inlen > fill )
    {
      S->buflen = 0;
      memcpy( S->buf + left, in, fill ); /* Fill buffer */
      blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
      blake2s_compress( S, S->buf ); /* Compress */
      in += fill; inlen -= fill;
      while(inlen > BLAKE2S_BLOCKBYTES) {
        blake2s_increment_counter(S, BLAKE2S_BLOCKBYTES);
        blake2s_compress( S, in );
        in += BLAKE2S_BLOCKBYTES;
        inlen -= BLAKE2S_BLOCKBYTES;
      }
    }
    memcpy( S->buf + S->buflen, in, inlen );
    S->buflen += inlen;
  }
}

int blake2s_final( blake2s_state *S, unsigned char *out )
{
  int i;

  if( blake2s_is_lastblock( S ) )
    return -1;

  blake2s_increment_counter( S, ( uint32 )S->buflen );
  blake2s_set_lastblock( S );
  memset( S->buf + S->buflen, 0, BLAKE2S_BLOCKBYTES - S->buflen ); /* Padding */
  blake2s_compress( S, S->buf );

  for( i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
    memcpy( out + sizeof( S->h[i] ) * i, &S->h[i], sizeof(uint32) );

  return 0;
}

#if defined(SUPERCOP)
int crypto_hash( unsigned char *out, unsigned char *in, unsigned long long inlen )
{
  return blake2s( out, BLAKE2S_OUTBYTES, in, inlen, NULL, 0 );
}
#endif

#if defined(BLAKE2S_SELFTEST)
#include <string.h>
#include "blake2-kat.h"
int main( void )
{
  uint8 key[BLAKE2S_KEYBYTES];
  uint8 buf[BLAKE2_KAT_LENGTH];
  size_t i, step;

  for( i = 0; i < BLAKE2S_KEYBYTES; ++i )
    key[i] = ( uint8 )i;

  for( i = 0; i < BLAKE2_KAT_LENGTH; ++i )
    buf[i] = ( uint8 )i;

  /* Test simple API */
  for( i = 0; i < BLAKE2_KAT_LENGTH; ++i )
  {
    uint8 hash[BLAKE2S_OUTBYTES];
    blake2s( hash, BLAKE2S_OUTBYTES, buf, i, key, BLAKE2S_KEYBYTES );

    if( 0 != memcmp( hash, blake2s_keyed_kat[i], BLAKE2S_OUTBYTES ) )
    {
      goto fail;
    }
  }

  /* Test streaming API */
  for(step = 1; step < BLAKE2S_BLOCKBYTES; ++step) {
    for (i = 0; i < BLAKE2_KAT_LENGTH; ++i) {
      uint8 hash[BLAKE2S_OUTBYTES];
      blake2s_state S;
      uint8 * p = buf;
      size_t mlen = i;
      int err = 0;

      if( (err = blake2s_init_key(&S, BLAKE2S_OUTBYTES, key, BLAKE2S_KEYBYTES)) < 0 ) {
        goto fail;
      }

      while (mlen >= step) {
        if ( (err = blake2s_update(&S, p, step)) < 0 ) {
          goto fail;
        }
        mlen -= step;
        p += step;
      }
      if ( (err = blake2s_update(&S, p, mlen)) < 0) {
        goto fail;
      }
      if ( (err = blake2s_final(&S, hash, BLAKE2S_OUTBYTES)) < 0) {
        goto fail;
      }

      if (0 != memcmp(hash, blake2s_keyed_kat[i], BLAKE2S_OUTBYTES)) {
        goto fail;
      }
    }
  }

  puts( "ok" );
  return 0;
fail:
  puts("error");
  return -1;
}
#endif