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comparison libtomcrypt/src/misc/compare_testvector.c @ 1471:6dba84798cd5

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Update to libtomcrypt 1.18.1, merged with Dropbear changes
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 21:44:05 +0800
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1470:8bba51a55704 1471:6dba84798cd5
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)
18 static 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 */
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)
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: $Format:%D$ */
86 /* git commit: $Format:%H$ */
87 /* commit time: $Format:%ai$ */