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 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