utils/tomcrypt/src/misc/compare_testvector.c at master · tsiry-sandratraina.com/rockbox-zig

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rockbox-zig / utils / tomcrypt / src / misc / compare_testvector.c

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 1/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 2 *
 3 * LibTomCrypt is a library that provides various cryptographic
 4 * algorithms in a highly modular and flexible manner.
 5 *
 6 * The library is free for all purposes without any express
 7 * guarantee it works.
 8 */
 9
10#include "tomcrypt.h"
11
12/**
13  @file compare_testvector.c
14  Function to compare two testvectors and print a (detailed) error-message if required, Steffen Jaeckel
15*/
16
17#if defined(LTC_TEST) && defined(LTC_TEST_DBG)
18static void _print_hex(const char* what, const void* v, const unsigned long l)
19{
20  const unsigned char* p = v;
21  unsigned long x, y = 0, z;
22  fprintf(stderr, "%s contents: \n", what);
23  for (x = 0; x < l; ) {
24      fprintf(stderr, "%02X ", p[x]);
25      if (!(++x % 16) || x == l) {
26         if((x % 16) != 0) {
27            z = 16 - (x % 16);
28            if(z >= 8)
29               fprintf(stderr, " ");
30            for (; z != 0; --z) {
31               fprintf(stderr, "   ");
32            }
33         }
34         fprintf(stderr, " | ");
35         for(; y < x; y++) {
36            if((y % 8) == 0)
37               fprintf(stderr, " ");
38            if(isgraph(p[y]))
39               fprintf(stderr, "%c", p[y]);
40            else
41               fprintf(stderr, ".");
42         }
43         fprintf(stderr, "\n");
44      }
45      else if((x % 8) == 0) {
46         fprintf(stderr, " ");
47      }
48  }
49}
50#endif
51
52/**
53  Compare two test-vectors
54
55  @param is             The data as it is
56  @param is_len         The length of is
57  @param should         The data as it should
58  @param should_len     The length of should
59  @param what           The type of the data
60  @param which          The iteration count
61  @return 0 on equality, -1 or 1 on difference
62*/
63int compare_testvector(const void* is, const unsigned long is_len, const void* should, const unsigned long should_len, const char* what, int which)
64{
65   int res = 0;
66   if(is_len != should_len)
67      res = is_len > should_len ? -1 : 1;
68   else
69      res = XMEMCMP(is, should, is_len);
70
71#if defined(LTC_TEST) && defined(LTC_TEST_DBG)
72   if (res != 0) {
73      fprintf(stderr, "Testvector #%i of %s failed:\n", which, what);
74      _print_hex("SHOULD", should, should_len);
75      _print_hex("IS    ", is, is_len);
76   }
77#else
78   LTC_UNUSED_PARAM(which);
79   LTC_UNUSED_PARAM(what);
80#endif
81
82   return res;
83}
84
85/* ref:         HEAD -> master, tag: v1.18.2 */
86/* git commit:  7e7eb695d581782f04b24dc444cbfde86af59853 */
87/* commit time: 2018-07-01 22:49:01 +0200 */