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97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
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#include <stdint.h>
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#include <string.h>
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#include "blake2.h"
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#include <sodium/private/common.h>
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CRYPTO_ALIGN(64)
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static const uint64_t blake2b_IV[8] = {
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0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL,
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0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
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0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL};
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static const uint8_t blake2b_sigma[12][16] = {
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{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
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{14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3},
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{11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4},
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{7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8},
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{9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13},
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{2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9},
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{12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11},
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{13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10},
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{6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5},
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{10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0},
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{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
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{14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3}};
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int
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blake2b_compress_ref(blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES])
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{
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uint64_t m[16];
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uint64_t v[16];
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int i;
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for(i = 0; i < 16; ++i)
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{
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m[i] = LOAD64_LE(block + i * sizeof(m[i]));
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}
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for(i = 0; i < 8; ++i)
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{
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v[i] = S->h[i];
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}
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v[8] = blake2b_IV[0];
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v[9] = blake2b_IV[1];
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v[10] = blake2b_IV[2];
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v[11] = blake2b_IV[3];
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v[12] = S->t[0] ^ blake2b_IV[4];
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v[13] = S->t[1] ^ blake2b_IV[5];
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v[14] = S->f[0] ^ blake2b_IV[6];
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v[15] = S->f[1] ^ blake2b_IV[7];
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#define G(r, i, a, b, c, d) \
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do \
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{ \
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a = a + b + m[blake2b_sigma[r][2 * i + 0]]; \
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d = ROTR64(d ^ a, 32); \
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c = c + d; \
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b = ROTR64(b ^ c, 24); \
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a = a + b + m[blake2b_sigma[r][2 * i + 1]]; \
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d = ROTR64(d ^ a, 16); \
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c = c + d; \
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b = ROTR64(b ^ c, 63); \
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} while(0)
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#define ROUND(r) \
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do \
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{ \
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G(r, 0, v[0], v[4], v[8], v[12]); \
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G(r, 1, v[1], v[5], v[9], v[13]); \
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G(r, 2, v[2], v[6], v[10], v[14]); \
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G(r, 3, v[3], v[7], v[11], v[15]); \
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G(r, 4, v[0], v[5], v[10], v[15]); \
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G(r, 5, v[1], v[6], v[11], v[12]); \
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G(r, 6, v[2], v[7], v[8], v[13]); \
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G(r, 7, v[3], v[4], v[9], v[14]); \
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} while(0)
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ROUND(0);
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ROUND(1);
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ROUND(2);
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ROUND(3);
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ROUND(4);
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ROUND(5);
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ROUND(6);
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ROUND(7);
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ROUND(8);
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ROUND(9);
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ROUND(10);
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ROUND(11);
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for(i = 0; i < 8; ++i)
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{
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S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
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}
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#undef G
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#undef ROUND
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return 0;
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}
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