Add a simple implementation of the Adler-32 checksum.

This commit is contained in:
Dag-Erling Smørgrav 2015-08-18 13:27:06 +00:00 committed by des
parent 1609b4e08a
commit 531eeec36b
5 changed files with 197 additions and 1 deletions

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@ -34,6 +34,7 @@
#define pearson_hash_str cryb_pearson_hash_str
#define murmur3_32_hash cryb_murmur3_32_hash
uint32_t adler32_hash(const void *, size_t);
uint16_t fletcher16_hash(const void *, size_t);
uint32_t fletcher32_hash(const void *, size_t);
uint64_t fletcher64_hash(const void *, size_t);

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@ -3,6 +3,7 @@ AM_CPPFLAGS = -I$(top_srcdir)/include
lib_LTLIBRARIES = libcryb-hash.la
libcryb_hash_la_SOURCES = \
adler32.c \
fletcher16.c \
fletcher32.c \
fletcher64.c \

53
lib/hash/adler32.c Normal file
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@ -0,0 +1,53 @@
/*-
* Copyright (c) 2015 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 <cryb/bitwise.h>
#include <cryb/endian.h>
#include <cryb/hash.h>
/*
* Simple implementation of the Adler-32 checksum described in RFC1905.
*/
uint32_t
adler32_hash(const void *data, size_t len)
{
const uint8_t *bytes;
uint32_t c0, c1;
for (bytes = data, c0 = 1, c1 = 0; len > 0; len--, bytes++) {
c0 = (c0 + *bytes) % 65521;
c1 = (c1 + c0) % 65521;
}
return (c1 << 16 | c0);
}

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@ -103,7 +103,8 @@ t_sha512_openssl_LDADD = $(libt) $(OPENSSL_LDADD) $(RT_LIBS)
endif
# libcryb-hash
TESTS += t_fletcher t_murmur3_32 t_pearson
TESTS += t_adler t_fletcher t_murmur3_32 t_pearson
t_adler_LDADD = $(libt) $(libhash)
t_fletcher_LDADD = $(libt) $(libhash)
t_murmur3_32_LDADD = $(libt) $(libhash)
t_pearson_LDADD = $(libt) $(libhash)

140
t/t_adler.c Normal file
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@ -0,0 +1,140 @@
/*-
* Copyright (c) 2015 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 <cryb/hash.h>
#include "t.h"
struct t_case {
const char *desc;
const char *data;
size_t len;
uint32_t sum;
};
/***************************************************************************
* Test cases
*/
static struct t_case t_cases[] = {
{
.desc = "len == 0",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 0,
.sum = 0x00000001,
},
{
.desc = "len == 1",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 1,
.sum = 0x00020002,
},
{
.desc = "len == 2",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 2,
.sum = 0x00060004,
},
{
.desc = "len == 3",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 3,
.sum = 0x000d0007,
},
{
.desc = "len == 4",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 4,
.sum = 0x0018000b,
},
{
.desc = "len == 5",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 5,
.sum = 0x00280010,
},
{
.desc = "len == 6",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 6,
.sum = 0x003e0016,
},
{
.desc = "len == 7",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 7,
.sum = 0x005b001d,
},
{
.desc = "len == 8",
.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
.len = 8,
.sum = 0x00800025,
},
};
/***************************************************************************
* Test function
*/
static int
t_adler(char **desc CRYB_UNUSED, void *arg)
{
struct t_case *t = arg;
int ret;
ret = t_compare_x32(t->sum, adler32_hash(t->data, t->len));
return (ret);
}
/***************************************************************************
* Boilerplate
*/
int
t_prepare(int argc, char *argv[])
{
int i, n;
(void)argc;
(void)argv;
n = sizeof t_cases / sizeof t_cases[0];
for (i = 0; i < n; ++i)
t_add_test(t_adler, &t_cases[i], t_cases[i].desc);
return (0);
}
void
t_cleanup(void)
{
}