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63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
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/* radare2 - LGPL - Copyright 2022 - pancake,siguza */
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// Ripped from https://github.com/Siguza/iometa/blob/master/src/cxx.c
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#include <r_hash.h>
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#define ROTL(x, b) (ut64)(((x) << (b)) | ((x) >> (64 - (b))))
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#define SIPROUND do { \
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v0 += v1; \
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v1 = ROTL(v1, 13) ^ v0; \
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v0 = ROTL(v0, 32); \
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v2 += v3; \
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v3 = ROTL(v3, 16) ^ v2; \
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v0 += v3; \
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v3 = ROTL(v3, 21) ^ v0; \
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v2 += v1; \
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v1 = ROTL(v1, 17) ^ v2; \
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v2 = ROTL(v2, 32); \
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} while (0)
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R_API ut64 r_hash_sip(const ut8 *in, ut64 inlen) {
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const ut8 *end;
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ut64 v0 = 0x0a257d1c9bbab1c0ULL;
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ut64 v1 = 0xb0eef52375ef8302ULL;
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ut64 v2 = 0x1533771c85aca6d4ULL;
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ut64 v3 = 0xa0e4e32062ff891cULL;
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for (end = in + (inlen & ~7ULL); in != end; in += 8) {
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ut64 m = ((ut64)in[7] << 56)
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| ((ut64)in[6] << 48)
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| ((ut64)in[5] << 40)
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| ((ut64)in[4] << 32)
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| ((ut64)in[3] << 24)
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| ((ut64)in[2] << 16)
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| ((ut64)in[1] << 8)
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| ((ut64)in[0]);
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v3 ^= m;
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SIPROUND;
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SIPROUND;
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v0 ^= m;
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}
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ut64 b = inlen << 56;
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switch (inlen & 7) {
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case 7: b |= (ut64)in[6] << 48;
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case 6: b |= (ut64)in[5] << 40;
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case 5: b |= (ut64)in[4] << 32;
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case 4: b |= (ut64)in[3] << 24;
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case 3: b |= (ut64)in[2] << 16;
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case 2: b |= (ut64)in[1] << 8;
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case 1: b |= (ut64)in[0];
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case 0: break;
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}
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v3 ^= b;
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SIPROUND;
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SIPROUND;
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v0 ^= b;
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v2 ^= 0xff;
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SIPROUND;
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SIPROUND;
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SIPROUND;
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SIPROUND;
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return v0 ^ v1 ^ v2 ^ v3;
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}
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