LCOV - code coverage report
Current view: top level - test - test-siphash24.c (source / functions) Hit Total Coverage
Test: systemd_full.info Lines: 63 63 100.0 %
Date: 2019-08-23 13:36:53 Functions: 3 3 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 28 46 60.9 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: LGPL-2.1+ */
       2                 :            : 
       3                 :            : #include "memory-util.h"
       4                 :            : #include "siphash24.h"
       5                 :            : 
       6                 :            : #define ITERATIONS 10000000ULL
       7                 :            : 
       8                 :         16 : static void do_test(const uint8_t *in, size_t len, const uint8_t *key) {
       9                 :         16 :         struct siphash state = {};
      10                 :            :         uint64_t out;
      11                 :            :         unsigned i, j;
      12                 :            : 
      13                 :         16 :         out = siphash24(in, len, key);
      14         [ -  + ]:         16 :         assert_se(out == 0xa129ca6149be45e5);
      15                 :            : 
      16                 :            :         /* verify the internal state as given in the above paper */
      17                 :         16 :         siphash24_init(&state, key);
      18         [ -  + ]:         16 :         assert_se(state.v0 == 0x7469686173716475);
      19         [ -  + ]:         16 :         assert_se(state.v1 == 0x6b617f6d656e6665);
      20         [ -  + ]:         16 :         assert_se(state.v2 == 0x6b7f62616d677361);
      21         [ -  + ]:         16 :         assert_se(state.v3 == 0x7b6b696e727e6c7b);
      22                 :         16 :         siphash24_compress(in, len, &state);
      23         [ -  + ]:         16 :         assert_se(state.v0 == 0x4a017198de0a59e0);
      24         [ -  + ]:         16 :         assert_se(state.v1 == 0x0d52f6f62a4f59a4);
      25         [ -  + ]:         16 :         assert_se(state.v2 == 0x634cb3577b01fd3d);
      26         [ -  + ]:         16 :         assert_se(state.v3 == 0xa5224d6f55c7d9c8);
      27                 :         16 :         out = siphash24_finalize(&state);
      28         [ -  + ]:         16 :         assert_se(out == 0xa129ca6149be45e5);
      29         [ -  + ]:         16 :         assert_se(state.v0 == 0xf6bcd53893fecff1);
      30         [ -  + ]:         16 :         assert_se(state.v1 == 0x54b9964c7ea0d937);
      31         [ -  + ]:         16 :         assert_se(state.v2 == 0x1b38329c099bb55a);
      32         [ -  + ]:         16 :         assert_se(state.v3 == 0x1814bb89ad7be679);
      33                 :            : 
      34                 :            :         /* verify that decomposing the input in three chunks gives the
      35                 :            :            same result */
      36         [ +  + ]:        256 :         for (i = 0; i < len; i++) {
      37         [ +  + ]:       2160 :                 for (j = i; j < len; j++) {
      38                 :       1920 :                         siphash24_init(&state, key);
      39                 :       1920 :                         siphash24_compress(in, i, &state);
      40                 :       1920 :                         siphash24_compress(&in[i], j - i, &state);
      41                 :       1920 :                         siphash24_compress(&in[j], len - j, &state);
      42                 :       1920 :                         out = siphash24_finalize(&state);
      43         [ -  + ]:       1920 :                         assert_se(out == 0xa129ca6149be45e5);
      44                 :            :                 }
      45                 :            :         }
      46                 :         16 : }
      47                 :            : 
      48                 :          4 : static void test_short_hashes(void) {
      49                 :          4 :         const uint8_t one[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
      50                 :            :                                 0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 };
      51                 :          4 :         const uint8_t  key[16] = { 0x22, 0x24, 0x41, 0x22, 0x55, 0x77, 0x88, 0x07,
      52                 :            :                                    0x23, 0x09, 0x23, 0x14, 0x0c, 0x33, 0x0e, 0x0f};
      53                 :          4 :         uint8_t two[sizeof one] = {};
      54                 :            : 
      55                 :          4 :         struct siphash state1 = {}, state2 = {};
      56                 :            :         unsigned i, j;
      57                 :            : 
      58                 :          4 :         siphash24_init(&state1, key);
      59                 :          4 :         siphash24_init(&state2, key);
      60                 :            : 
      61                 :            :         /* hashing 1, 2, 3, 4, 5, ..., 16 bytes, with the byte after the buffer different */
      62         [ +  + ]:         68 :         for (i = 1; i <= sizeof one; i++) {
      63                 :         64 :                 siphash24_compress(one, i, &state1);
      64                 :            : 
      65                 :         64 :                 two[i-1] = one[i-1];
      66                 :         64 :                 siphash24_compress(two, i, &state2);
      67                 :            : 
      68         [ -  + ]:         64 :                 assert_se(memcmp(&state1, &state2, sizeof state1) == 0);
      69                 :            :         }
      70                 :            : 
      71                 :            :         /* hashing n and 1, n and 2, n and 3, ..., n-1 and 1, n-2 and 2, ... */
      72         [ +  + ]:         68 :         for (i = sizeof one; i > 0; i--) {
      73         [ +  - ]:         64 :                 zero(two);
      74                 :            : 
      75         [ +  + ]:       1088 :                 for (j = 1; j <= sizeof one; j++) {
      76                 :       1024 :                         siphash24_compress(one, i, &state1);
      77                 :       1024 :                         siphash24_compress(one, j, &state1);
      78                 :            : 
      79                 :       1024 :                         siphash24_compress(one, i, &state2);
      80                 :       1024 :                         two[j-1] = one[j-1];
      81                 :       1024 :                         siphash24_compress(two, j, &state2);
      82                 :            : 
      83         [ -  + ]:       1024 :                         assert_se(memcmp(&state1, &state2, sizeof state1) == 0);
      84                 :            :                 }
      85                 :            :         }
      86                 :          4 : }
      87                 :            : 
      88                 :            : /* see https://131002.net/siphash/siphash.pdf, Appendix A */
      89                 :          4 : int main(int argc, char *argv[]) {
      90                 :          4 :         const uint8_t in[15]  = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
      91                 :            :                                   0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e };
      92                 :          4 :         const uint8_t key[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
      93                 :            :                                   0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
      94                 :            :         uint8_t in_buf[20];
      95                 :            : 
      96                 :            :         /* Test with same input but different alignments. */
      97                 :          4 :         memcpy(in_buf, in, sizeof(in));
      98                 :          4 :         do_test(in_buf, sizeof(in), key);
      99                 :          4 :         memcpy(in_buf + 1, in, sizeof(in));
     100                 :          4 :         do_test(in_buf + 1, sizeof(in), key);
     101                 :          4 :         memcpy(in_buf + 2, in, sizeof(in));
     102                 :          4 :         do_test(in_buf + 2, sizeof(in), key);
     103                 :          4 :         memcpy(in_buf + 4, in, sizeof(in));
     104                 :          4 :         do_test(in_buf + 4, sizeof(in), key);
     105                 :            : 
     106                 :          4 :         test_short_hashes();
     107                 :            : }

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