42 lines
848 B
C
42 lines
848 B
C
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#if !defined(SCRYPT_CHOOSE_COMPILETIME) || !defined(SCRYPT_SALSA64_INCLUDED)
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#undef SCRYPT_MIX
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#define SCRYPT_MIX "Salsa64/8 Ref"
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#undef SCRYPT_SALSA64_INCLUDED
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#define SCRYPT_SALSA64_INCLUDED
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#define SCRYPT_SALSA64_BASIC
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static void
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salsa64_core_basic(uint64_t state[16]) {
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const size_t rounds = 8;
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uint64_t v[16], t;
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size_t i;
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for (i = 0; i < 16; i++) v[i] = state[i];
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#define G(a,b,c,d) \
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t = v[a]+v[d]; t = ROTL64(t, 32); v[b] ^= t; \
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t = v[b]+v[a]; t = ROTL64(t, 13); v[c] ^= t; \
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t = v[c]+v[b]; t = ROTL64(t, 39); v[d] ^= t; \
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t = v[d]+v[c]; t = ROTL64(t, 32); v[a] ^= t; \
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for (i = 0; i < rounds; i += 2) {
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G( 0, 4, 8,12);
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G( 5, 9,13, 1);
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G(10,14, 2, 6);
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G(15, 3, 7,11);
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G( 0, 1, 2, 3);
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G( 5, 6, 7, 4);
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G(10,11, 8, 9);
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G(15,12,13,14);
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}
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for (i = 0; i < 16; i++) state[i] += v[i];
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#undef G
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}
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#endif
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