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annotate libtomcrypt/src/misc/compare_testvector.c @ 1756:d5680e12ac33

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Move fuzzing code to fuzz/ subdirectory, improve Makefile.in
author Matt Johnston <matt@ucc.asn.au>
date Fri, 23 Oct 2020 23:10:20 +0800
parents 6dba84798cd5
children
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rev   line source
1471
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9
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10 #include "tomcrypt.h"
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11
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12 /**
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13 @file compare_testvector.c
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14 Function to compare two testvectors and print a (detailed) error-message if required, Steffen Jaeckel
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15 */
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16
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17 #if defined(LTC_TEST) && defined(LTC_TEST_DBG)
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18 static void _print_hex(const char* what, const void* v, const unsigned long l)
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19 {
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20 const unsigned char* p = v;
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21 unsigned long x, y = 0, z;
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22 fprintf(stderr, "%s contents: \n", what);
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23 for (x = 0; x < l; ) {
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24 fprintf(stderr, "%02X ", p[x]);
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25 if (!(++x % 16) || x == l) {
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26 if((x % 16) != 0) {
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27 z = 16 - (x % 16);
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28 if(z >= 8)
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29 fprintf(stderr, " ");
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30 for (; z != 0; --z) {
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31 fprintf(stderr, " ");
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32 }
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33 }
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34 fprintf(stderr, " | ");
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35 for(; y < x; y++) {
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36 if((y % 8) == 0)
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37 fprintf(stderr, " ");
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38 if(isgraph(p[y]))
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39 fprintf(stderr, "%c", p[y]);
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40 else
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41 fprintf(stderr, ".");
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42 }
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43 fprintf(stderr, "\n");
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44 }
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45 else if((x % 8) == 0) {
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46 fprintf(stderr, " ");
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47 }
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48 }
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49 }
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50 #endif
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51
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52 /**
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53 Compare two test-vectors
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54
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55 @param is The data as it is
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56 @param is_len The length of is
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57 @param should The data as it should
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58 @param should_len The length of should
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59 @param what The type of the data
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60 @param which The iteration count
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61 @return 0 on equality, -1 or 1 on difference
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62 */
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63 int compare_testvector(const void* is, const unsigned long is_len, const void* should, const unsigned long should_len, const char* what, int which)
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64 {
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65 int res = 0;
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66 if(is_len != should_len)
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67 res = is_len > should_len ? -1 : 1;
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68 else
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69 res = XMEMCMP(is, should, is_len);
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70
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71 #if defined(LTC_TEST) && defined(LTC_TEST_DBG)
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72 if (res != 0) {
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73 fprintf(stderr, "Testvector #%i of %s failed:\n", which, what);
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74 _print_hex("SHOULD", should, should_len);
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75 _print_hex("IS ", is, is_len);
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76 }
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77 #else
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78 LTC_UNUSED_PARAM(which);
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79 LTC_UNUSED_PARAM(what);
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80 #endif
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81
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82 return res;
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83 }
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84
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85 /* ref: $Format:%D$ */
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86 /* git commit: $Format:%H$ */
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87 /* commit time: $Format:%ai$ */