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/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
#include "../wireguard.h"
#include "siphash24.h"
#include <linux/kernel.h>
#define ROTL(x,b) (uint64_t)(((x) << (b)) | ((x) >> (64 - (b))))
#define U8TO64(p) le64_to_cpu(*(__le64 *)(p))
#define SIPROUND \
do { \
v0 += v1; v1 = ROTL(v1, 13); v1 ^= v0; v0 = ROTL(v0, 32); \
v2 += v3; v3 = ROTL(v3, 16); v3 ^= v2; \
v0 += v3; v3 = ROTL(v3, 21); v3 ^= v0; \
v2 += v1; v1 = ROTL(v1, 17); v1 ^= v2; v2 = ROTL(v2, 32); \
} while(0)
__attribute__((optimize("unroll-loops")))
uint64_t siphash24(const uint8_t *data, size_t len, const uint8_t key[static SIPHASH24_KEY_LEN])
{
uint64_t v0 = 0x736f6d6570736575ULL;
uint64_t v1 = 0x646f72616e646f6dULL;
uint64_t v2 = 0x6c7967656e657261ULL;
uint64_t v3 = 0x7465646279746573ULL;
uint64_t b;
uint64_t k0 = U8TO64(key);
uint64_t k1 = U8TO64(key + sizeof(uint64_t));
uint64_t m;
const uint8_t *end = data + len - (len % sizeof(uint64_t));
const uint8_t left = len & (sizeof(uint64_t) - 1);
b = ((uint64_t)len) << 56;
v3 ^= k1;
v2 ^= k0;
v1 ^= k1;
v0 ^= k0;
for (; data != end; data += sizeof(uint64_t)) {
m = U8TO64(data);
v3 ^= m;
SIPROUND;
SIPROUND;
v0 ^= m;
}
switch (left) {
case 7: b |= ((uint64_t)data[6]) << 48;
case 6: b |= ((uint64_t)data[5]) << 40;
case 5: b |= ((uint64_t)data[4]) << 32;
case 4: b |= ((uint64_t)data[3]) << 24;
case 3: b |= ((uint64_t)data[2]) << 16;
case 2: b |= ((uint64_t)data[1]) << 8;
case 1: b |= ((uint64_t)data[0]); break;
case 0: break;
}
v3 ^= b;
SIPROUND;
SIPROUND;
v0 ^= b;
v2 ^= 0xff;
SIPROUND;
SIPROUND;
SIPROUND;
SIPROUND;
b = (v0 ^ v1) ^ (v2 ^ v3);
return (__force uint64_t)cpu_to_le64(b);
}
#ifdef DEBUG
static const uint8_t test_vectors[64][8] = {
{ 0x31, 0x0e, 0x0e, 0xdd, 0x47, 0xdb, 0x6f, 0x72 },
{ 0xfd, 0x67, 0xdc, 0x93, 0xc5, 0x39, 0xf8, 0x74 },
{ 0x5a, 0x4f, 0xa9, 0xd9, 0x09, 0x80, 0x6c, 0x0d },
{ 0x2d, 0x7e, 0xfb, 0xd7, 0x96, 0x66, 0x67, 0x85 },
{ 0xb7, 0x87, 0x71, 0x27, 0xe0, 0x94, 0x27, 0xcf },
{ 0x8d, 0xa6, 0x99, 0xcd, 0x64, 0x55, 0x76, 0x18 },
{ 0xce, 0xe3, 0xfe, 0x58, 0x6e, 0x46, 0xc9, 0xcb },
{ 0x37, 0xd1, 0x01, 0x8b, 0xf5, 0x00, 0x02, 0xab },
{ 0x62, 0x24, 0x93, 0x9a, 0x79, 0xf5, 0xf5, 0x93 },
{ 0xb0, 0xe4, 0xa9, 0x0b, 0xdf, 0x82, 0x00, 0x9e },
{ 0xf3, 0xb9, 0xdd, 0x94, 0xc5, 0xbb, 0x5d, 0x7a },
{ 0xa7, 0xad, 0x6b, 0x22, 0x46, 0x2f, 0xb3, 0xf4 },
{ 0xfb, 0xe5, 0x0e, 0x86, 0xbc, 0x8f, 0x1e, 0x75 },
{ 0x90, 0x3d, 0x84, 0xc0, 0x27, 0x56, 0xea, 0x14 },
{ 0xee, 0xf2, 0x7a, 0x8e, 0x90, 0xca, 0x23, 0xf7 },
{ 0xe5, 0x45, 0xbe, 0x49, 0x61, 0xca, 0x29, 0xa1 },
{ 0xdb, 0x9b, 0xc2, 0x57, 0x7f, 0xcc, 0x2a, 0x3f },
{ 0x94, 0x47, 0xbe, 0x2c, 0xf5, 0xe9, 0x9a, 0x69 },
{ 0x9c, 0xd3, 0x8d, 0x96, 0xf0, 0xb3, 0xc1, 0x4b },
{ 0xbd, 0x61, 0x79, 0xa7, 0x1d, 0xc9, 0x6d, 0xbb },
{ 0x98, 0xee, 0xa2, 0x1a, 0xf2, 0x5c, 0xd6, 0xbe },
{ 0xc7, 0x67, 0x3b, 0x2e, 0xb0, 0xcb, 0xf2, 0xd0 },
{ 0x88, 0x3e, 0xa3, 0xe3, 0x95, 0x67, 0x53, 0x93 },
{ 0xc8, 0xce, 0x5c, 0xcd, 0x8c, 0x03, 0x0c, 0xa8 },
{ 0x94, 0xaf, 0x49, 0xf6, 0xc6, 0x50, 0xad, 0xb8 },
{ 0xea, 0xb8, 0x85, 0x8a, 0xde, 0x92, 0xe1, 0xbc },
{ 0xf3, 0x15, 0xbb, 0x5b, 0xb8, 0x35, 0xd8, 0x17 },
{ 0xad, 0xcf, 0x6b, 0x07, 0x63, 0x61, 0x2e, 0x2f },
{ 0xa5, 0xc9, 0x1d, 0xa7, 0xac, 0xaa, 0x4d, 0xde },
{ 0x71, 0x65, 0x95, 0x87, 0x66, 0x50, 0xa2, 0xa6 },
{ 0x28, 0xef, 0x49, 0x5c, 0x53, 0xa3, 0x87, 0xad },
{ 0x42, 0xc3, 0x41, 0xd8, 0xfa, 0x92, 0xd8, 0x32 },
{ 0xce, 0x7c, 0xf2, 0x72, 0x2f, 0x51, 0x27, 0x71 },
{ 0xe3, 0x78, 0x59, 0xf9, 0x46, 0x23, 0xf3, 0xa7 },
{ 0x38, 0x12, 0x05, 0xbb, 0x1a, 0xb0, 0xe0, 0x12 },
{ 0xae, 0x97, 0xa1, 0x0f, 0xd4, 0x34, 0xe0, 0x15 },
{ 0xb4, 0xa3, 0x15, 0x08, 0xbe, 0xff, 0x4d, 0x31 },
{ 0x81, 0x39, 0x62, 0x29, 0xf0, 0x90, 0x79, 0x02 },
{ 0x4d, 0x0c, 0xf4, 0x9e, 0xe5, 0xd4, 0xdc, 0xca },
{ 0x5c, 0x73, 0x33, 0x6a, 0x76, 0xd8, 0xbf, 0x9a },
{ 0xd0, 0xa7, 0x04, 0x53, 0x6b, 0xa9, 0x3e, 0x0e },
{ 0x92, 0x59, 0x58, 0xfc, 0xd6, 0x42, 0x0c, 0xad },
{ 0xa9, 0x15, 0xc2, 0x9b, 0xc8, 0x06, 0x73, 0x18 },
{ 0x95, 0x2b, 0x79, 0xf3, 0xbc, 0x0a, 0xa6, 0xd4 },
{ 0xf2, 0x1d, 0xf2, 0xe4, 0x1d, 0x45, 0x35, 0xf9 },
{ 0x87, 0x57, 0x75, 0x19, 0x04, 0x8f, 0x53, 0xa9 },
{ 0x10, 0xa5, 0x6c, 0xf5, 0xdf, 0xcd, 0x9a, 0xdb },
{ 0xeb, 0x75, 0x09, 0x5c, 0xcd, 0x98, 0x6c, 0xd0 },
{ 0x51, 0xa9, 0xcb, 0x9e, 0xcb, 0xa3, 0x12, 0xe6 },
{ 0x96, 0xaf, 0xad, 0xfc, 0x2c, 0xe6, 0x66, 0xc7 },
{ 0x72, 0xfe, 0x52, 0x97, 0x5a, 0x43, 0x64, 0xee },
{ 0x5a, 0x16, 0x45, 0xb2, 0x76, 0xd5, 0x92, 0xa1 },
{ 0xb2, 0x74, 0xcb, 0x8e, 0xbf, 0x87, 0x87, 0x0a },
{ 0x6f, 0x9b, 0xb4, 0x20, 0x3d, 0xe7, 0xb3, 0x81 },
{ 0xea, 0xec, 0xb2, 0xa3, 0x0b, 0x22, 0xa8, 0x7f },
{ 0x99, 0x24, 0xa4, 0x3c, 0xc1, 0x31, 0x57, 0x24 },
{ 0xbd, 0x83, 0x8d, 0x3a, 0xaf, 0xbf, 0x8d, 0xb7 },
{ 0x0b, 0x1a, 0x2a, 0x32, 0x65, 0xd5, 0x1a, 0xea },
{ 0x13, 0x50, 0x79, 0xa3, 0x23, 0x1c, 0xe6, 0x60 },
{ 0x93, 0x2b, 0x28, 0x46, 0xe4, 0xd7, 0x06, 0x66 },
{ 0xe1, 0x91, 0x5f, 0x5c, 0xb1, 0xec, 0xa4, 0x6c },
{ 0xf3, 0x25, 0x96, 0x5c, 0xa1, 0x6d, 0x62, 0x9f },
{ 0x57, 0x5f, 0xf2, 0x8e, 0x60, 0x38, 0x1b, 0xe5 },
{ 0x72, 0x45, 0x06, 0xeb, 0x4c, 0x32, 0x8a, 0x95 }
};
bool siphash24_selftest(void)
{
uint8_t in[64], k[16];
uint64_t out;
bool success = true;
size_t i;
for (i = 0; i < 16; ++i)
k[i] = (uint8_t)i;
for (i = 0; i < 64; ++i) {
in[i] = (uint8_t)i;
out = siphash24(in, i, k);
if (memcmp(&out, test_vectors[i], 8)) {
pr_info("siphash24 self-test %zu: FAIL\n", i + 1);
success = false;
}
}
if (success)
pr_info("siphash24 self-tests: pass\n");
return success;
}
#endif
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