1
2 #include <stdint.h>
3 #include <string.h>
4
5 #include "blake2.h"
6 #include "private/common.h"
7
8 CRYPTO_ALIGN(64)
9 static const uint64_t blake2b_IV[8] = {
10 0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL,
11 0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
12 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
13 };
14
15 static const uint8_t blake2b_sigma[12][16] = {
16 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
17 { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
18 { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
19 { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
20 { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
21 { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
22 { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
23 { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
24 { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
25 { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
26 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
27 { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
28 };
29
30 int
blake2b_compress_ref(blake2b_state * S,const uint8_t block[BLAKE2B_BLOCKBYTES])31 blake2b_compress_ref(blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES])
32 {
33 uint64_t m[16];
34 uint64_t v[16];
35 int i;
36
37 for (i = 0; i < 16; ++i) {
38 m[i] = LOAD64_LE(block + i * sizeof(m[i]));
39 }
40 for (i = 0; i < 8; ++i) {
41 v[i] = S->h[i];
42 }
43 v[8] = blake2b_IV[0];
44 v[9] = blake2b_IV[1];
45 v[10] = blake2b_IV[2];
46 v[11] = blake2b_IV[3];
47 v[12] = S->t[0] ^ blake2b_IV[4];
48 v[13] = S->t[1] ^ blake2b_IV[5];
49 v[14] = S->f[0] ^ blake2b_IV[6];
50 v[15] = S->f[1] ^ blake2b_IV[7];
51 #define G(r, i, a, b, c, d) \
52 do { \
53 a = a + b + m[blake2b_sigma[r][2 * i + 0]]; \
54 d = ROTR64(d ^ a, 32); \
55 c = c + d; \
56 b = ROTR64(b ^ c, 24); \
57 a = a + b + m[blake2b_sigma[r][2 * i + 1]]; \
58 d = ROTR64(d ^ a, 16); \
59 c = c + d; \
60 b = ROTR64(b ^ c, 63); \
61 } while (0)
62 #define ROUND(r) \
63 do { \
64 G(r, 0, v[0], v[4], v[8], v[12]); \
65 G(r, 1, v[1], v[5], v[9], v[13]); \
66 G(r, 2, v[2], v[6], v[10], v[14]); \
67 G(r, 3, v[3], v[7], v[11], v[15]); \
68 G(r, 4, v[0], v[5], v[10], v[15]); \
69 G(r, 5, v[1], v[6], v[11], v[12]); \
70 G(r, 6, v[2], v[7], v[8], v[13]); \
71 G(r, 7, v[3], v[4], v[9], v[14]); \
72 } while (0)
73 ROUND(0);
74 ROUND(1);
75 ROUND(2);
76 ROUND(3);
77 ROUND(4);
78 ROUND(5);
79 ROUND(6);
80 ROUND(7);
81 ROUND(8);
82 ROUND(9);
83 ROUND(10);
84 ROUND(11);
85
86 for (i = 0; i < 8; ++i) {
87 S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
88 }
89
90 #undef G
91 #undef ROUND
92 return 0;
93 }
94