view libtomcrypt/src/misc/compare_testvector.c @ 1734:73646de50f13DROPBEAR_2020.80

version 2020.80
author Matt Johnston Fri, 26 Jun 2020 21:45:59 +0800 6dba84798cd5
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```/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*/

#include "tomcrypt.h"

/**
@file compare_testvector.c
Function to compare two testvectors and print a (detailed) error-message if required, Steffen Jaeckel
*/

#if defined(LTC_TEST) && defined(LTC_TEST_DBG)
static void _print_hex(const char* what, const void* v, const unsigned long l)
{
const unsigned char* p = v;
unsigned long x, y = 0, z;
fprintf(stderr, "%s contents: \n", what);
for (x = 0; x < l; ) {
fprintf(stderr, "%02X ", p[x]);
if (!(++x % 16) || x == l) {
if((x % 16) != 0) {
z = 16 - (x % 16);
if(z >= 8)
fprintf(stderr, " ");
for (; z != 0; --z) {
fprintf(stderr, "   ");
}
}
fprintf(stderr, " | ");
for(; y < x; y++) {
if((y % 8) == 0)
fprintf(stderr, " ");
if(isgraph(p[y]))
fprintf(stderr, "%c", p[y]);
else
fprintf(stderr, ".");
}
fprintf(stderr, "\n");
}
else if((x % 8) == 0) {
fprintf(stderr, " ");
}
}
}
#endif

/**
Compare two test-vectors

@param is             The data as it is
@param is_len         The length of is
@param should         The data as it should
@param should_len     The length of should
@param what           The type of the data
@param which          The iteration count
@return 0 on equality, -1 or 1 on difference
*/
int compare_testvector(const void* is, const unsigned long is_len, const void* should, const unsigned long should_len, const char* what, int which)
{
int res = 0;
if(is_len != should_len)
res = is_len > should_len ? -1 : 1;
else
res = XMEMCMP(is, should, is_len);

#if defined(LTC_TEST) && defined(LTC_TEST_DBG)
if (res != 0) {
fprintf(stderr, "Testvector #%i of %s failed:\n", which, what);
_print_hex("SHOULD", should, should_len);
_print_hex("IS    ", is, is_len);
}
#else
LTC_UNUSED_PARAM(which);
LTC_UNUSED_PARAM(what);
#endif

return res;
}

/* ref:         \$Format:%D\$ */
/* git commit:  \$Format:%H\$ */
/* commit time: \$Format:%ai\$ */
```