src/test/test-siphash24.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2015 Tom Gundersen
   6 ***/
   7
   8 #include "siphash24.h"
   9 #include "util.h"
  10
  11 #define ITERATIONS 10000000ULL
  12
  13 static void do_test(const uint8_t *in, size_t len, const uint8_t *key) {
  14         struct siphash state = {};
  15         uint64_t out;
  16         unsigned i, j;
  17
  18         out = siphash24(in, len, key);
  19         assert_se(out == 0xa129ca6149be45e5);
  20
  21         /* verify the internal state as given in the above paper */
  22         siphash24_init(&state, key);
  23         assert_se(state.v0 == 0x7469686173716475);
  24         assert_se(state.v1 == 0x6b617f6d656e6665);
  25         assert_se(state.v2 == 0x6b7f62616d677361);
  26         assert_se(state.v3 == 0x7b6b696e727e6c7b);
  27         siphash24_compress(in, len, &state);
  28         assert_se(state.v0 == 0x4a017198de0a59e0);
  29         assert_se(state.v1 == 0x0d52f6f62a4f59a4);
  30         assert_se(state.v2 == 0x634cb3577b01fd3d);
  31         assert_se(state.v3 == 0xa5224d6f55c7d9c8);
  32         out = siphash24_finalize(&state);
  33         assert_se(out == 0xa129ca6149be45e5);
  34         assert_se(state.v0 == 0xf6bcd53893fecff1);
  35         assert_se(state.v1 == 0x54b9964c7ea0d937);
  36         assert_se(state.v2 == 0x1b38329c099bb55a);
  37         assert_se(state.v3 == 0x1814bb89ad7be679);
  38
  39         /* verify that decomposing the input in three chunks gives the
  40            same result */
  41         for (i = 0; i < len; i++) {
  42                 for (j = i; j < len; j++) {
  43                         siphash24_init(&state, key);
  44                         siphash24_compress(in, i, &state);
  45                         siphash24_compress(&in[i], j - i, &state);
  46                         siphash24_compress(&in[j], len - j, &state);
  47                         out = siphash24_finalize(&state);
  48                         assert_se(out == 0xa129ca6149be45e5);
  49                 }
  50         }
  51 }
  52
  53 static void test_short_hashes(void) {
  54         const uint8_t one[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
  55                                 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 };
  56         const uint8_t  key[16] = { 0x22, 0x24, 0x41, 0x22, 0x55, 0x77, 0x88, 0x07,
  57                                    0x23, 0x09, 0x23, 0x14, 0x0c, 0x33, 0x0e, 0x0f};
  58         uint8_t two[sizeof one] = {};
  59
  60         struct siphash state1 = {}, state2 = {};
  61         unsigned i, j;
  62
  63         siphash24_init(&state1, key);
  64         siphash24_init(&state2, key);
  65
  66         /* hashing 1, 2, 3, 4, 5, ..., 16 bytes, with the byte after the buffer different */
  67         for (i = 1; i <= sizeof one; i++) {
  68                 siphash24_compress(one, i, &state1);
  69
  70                 two[i-1] = one[i-1];
  71                 siphash24_compress(two, i, &state2);
  72
  73                 assert_se(memcmp(&state1, &state2, sizeof state1) == 0);
  74         }
  75
  76         /* hashing n and 1, n and 2, n and 3, ..., n-1 and 1, n-2 and 2, ... */
  77         for (i = sizeof one; i > 0; i--) {
  78                 zero(two);
  79
  80                 for (j = 1; j <= sizeof one; j++) {
  81                         siphash24_compress(one, i, &state1);
  82                         siphash24_compress(one, j, &state1);
  83
  84                         siphash24_compress(one, i, &state2);
  85                         two[j-1] = one[j-1];
  86                         siphash24_compress(two, j, &state2);
  87
  88                         assert_se(memcmp(&state1, &state2, sizeof state1) == 0);
  89                 }
  90         }
  91 }
  92
  93 /* see https://131002.net/siphash/siphash.pdf, Appendix A */
  94 int main(int argc, char *argv[]) {
  95         const uint8_t in[15]  = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  96                                   0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e };
  97         const uint8_t key[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  98                                   0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
  99         uint8_t in_buf[20];
 100
 101         /* Test with same input but different alignments. */
 102         memcpy(in_buf, in, sizeof(in));
 103         do_test(in_buf, sizeof(in), key);
 104         memcpy(in_buf + 1, in, sizeof(in));
 105         do_test(in_buf + 1, sizeof(in), key);
 106         memcpy(in_buf + 2, in, sizeof(in));
 107         do_test(in_buf + 2, sizeof(in), key);
 108         memcpy(in_buf + 4, in, sizeof(in));
 109         do_test(in_buf + 4, sizeof(in), key);
 110
 111         test_short_hashes();
 112 }