mirror of
https://github.com/cryb-to/cryb-to.git
synced 2024-11-13 01:05:40 +00:00
155 lines
4 KiB
C
155 lines
4 KiB
C
/*-
|
||
* Copyright (c) 2015-2016 Dag-Erling Smørgrav
|
||
* All rights reserved.
|
||
*
|
||
* Redistribution and use in source and binary forms, with or without
|
||
* modification, are permitted provided that the following conditions
|
||
* are met:
|
||
* 1. Redistributions of source code must retain the above copyright
|
||
* notice, this list of conditions and the following disclaimer.
|
||
* 2. Redistributions in binary form must reproduce the above copyright
|
||
* notice, this list of conditions and the following disclaimer in the
|
||
* documentation and/or other materials provided with the distribution.
|
||
* 3. The name of the author may not be used to endorse or promote
|
||
* products derived from this software without specific prior written
|
||
* permission.
|
||
*
|
||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
* SUCH DAMAGE.
|
||
*/
|
||
|
||
#include "cryb/impl.h"
|
||
|
||
#include <stdint.h>
|
||
#include <string.h>
|
||
#include <unistd.h>
|
||
|
||
#include <cryb/hash.h>
|
||
|
||
#include <cryb/test.h>
|
||
|
||
#define ADLER32_INVALID 0xffffffffLU
|
||
|
||
#define TRI(n) (n * (n + 1) / 2)
|
||
|
||
static uint8_t ones8[65536];
|
||
|
||
struct t_case {
|
||
const char *desc;
|
||
const void *data;
|
||
size_t len;
|
||
uint32_t sum;
|
||
};
|
||
|
||
/***************************************************************************
|
||
* Test cases
|
||
*
|
||
* Most of these test cases use input sequences where each word has the
|
||
* value 1. To understand the test cases, it helps to realize that (until
|
||
* it overflows) the low word of the Adler checksum of such a sequence of
|
||
* length n is equal to n + 1, while the high word is equal to the nth
|
||
* triangular number plus n, i.e. (n*(n+1))/2+n. Also, unlike Fletcher32,
|
||
* the input width for Adler32 is always 8 bits.
|
||
*/
|
||
#define TRIpN(n) ((n * (n + 1) / 2) + n)
|
||
static struct t_case t_cases[] = {
|
||
/* trivial cases */
|
||
{
|
||
.desc = "all-zeroes message",
|
||
.data = t_zero,
|
||
.len = sizeof t_zero,
|
||
.sum = sizeof t_zero << 16 | 0x0001U,
|
||
},
|
||
{
|
||
.desc = "length 0",
|
||
.data = ones8,
|
||
.len = 0,
|
||
.sum = 0x00000001,
|
||
},
|
||
{
|
||
.desc = "squeamish ossifrage",
|
||
.data = "the magic words are squeamish ossifrage",
|
||
.len = 39,
|
||
.sum = 0x23880edd,
|
||
},
|
||
|
||
/* overflow */
|
||
{
|
||
.desc = "high overflow - 1",
|
||
.data = ones8,
|
||
.len = 359,
|
||
.sum = (TRIpN(359U) % 65521U) << 16 | 360U,
|
||
},
|
||
{
|
||
.desc = "high overflow",
|
||
.data = ones8,
|
||
.len = 363,
|
||
.sum = (TRIpN(363U) % 65521U) << 16 | 364U,
|
||
},
|
||
{
|
||
.desc = "low overflow - 1",
|
||
.data = ones8,
|
||
.len = 65519,
|
||
.sum = (TRIpN(65519U) % 65521U) << 16 | 65520U,
|
||
},
|
||
{
|
||
.desc = "low overflow",
|
||
.data = ones8,
|
||
.len = 65520,
|
||
.sum = (TRIpN(65520U) % 65521U) << 16 | 0U,
|
||
},
|
||
{
|
||
.desc = "low overflow + 1",
|
||
.data = ones8,
|
||
.len = 65521,
|
||
.sum = ((TRIpN(65520U) + 1) % 65521U) << 16 | 1U,
|
||
},
|
||
};
|
||
|
||
/***************************************************************************
|
||
* Test function
|
||
*/
|
||
static int
|
||
t_adler32(char **desc CRYB_UNUSED, void *arg)
|
||
{
|
||
struct t_case *t = arg;
|
||
|
||
return (t_compare_x32(t->sum, adler32_hash(t->data, t->len)));
|
||
}
|
||
|
||
|
||
/***************************************************************************
|
||
* Boilerplate
|
||
*/
|
||
|
||
static int
|
||
t_prepare(int argc, char *argv[])
|
||
{
|
||
unsigned int i, n;
|
||
|
||
(void)argc;
|
||
(void)argv;
|
||
memset(&ones8, 1, sizeof ones8);
|
||
n = sizeof t_cases / sizeof t_cases[0];
|
||
for (i = 0; i < n; ++i)
|
||
if (t_cases[i].sum != 0xffffffffLU)
|
||
t_add_test(t_adler32, &t_cases[i], "%s",
|
||
t_cases[i].desc);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
main(int argc, char *argv[])
|
||
{
|
||
|
||
t_main(t_prepare, NULL, argc, argv);
|
||
}
|