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Add a simple implementation of the Adler-32 checksum.
This commit is contained in:
Dag-Erling Smørgrav
des
parent
1609b4e08a
commit
531eeec36b
5 changed files with 197 additions and 1 deletions
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@ -34,6 +34,7 @@
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#define pearson_hash_str cryb_pearson_hash_str
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#define murmur3_32_hash cryb_murmur3_32_hash
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uint32_t adler32_hash(const void *, size_t);
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uint16_t fletcher16_hash(const void *, size_t);
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uint32_t fletcher32_hash(const void *, size_t);
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uint64_t fletcher64_hash(const void *, size_t);
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@ -3,6 +3,7 @@ AM_CPPFLAGS = -I$(top_srcdir)/include
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lib_LTLIBRARIES = libcryb-hash.la
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libcryb_hash_la_SOURCES = \
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adler32.c \
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fletcher16.c \
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fletcher32.c \
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fletcher64.c \
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53
lib/hash/adler32.c
Normal file
53
lib/hash/adler32.c
Normal file
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@ -0,0 +1,53 @@
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/*-
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* Copyright (c) 2015 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cryb/impl.h"
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#include <stdint.h>
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#include <string.h>
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#include <cryb/bitwise.h>
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#include <cryb/endian.h>
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#include <cryb/hash.h>
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/*
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* Simple implementation of the Adler-32 checksum described in RFC1905.
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*/
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uint32_t
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adler32_hash(const void *data, size_t len)
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{
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const uint8_t *bytes;
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uint32_t c0, c1;
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for (bytes = data, c0 = 1, c1 = 0; len > 0; len--, bytes++) {
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c0 = (c0 + *bytes) % 65521;
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c1 = (c1 + c0) % 65521;
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}
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return (c1 << 16 | c0);
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}
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@ -103,7 +103,8 @@ t_sha512_openssl_LDADD = $(libt) $(OPENSSL_LDADD) $(RT_LIBS)
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endif
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# libcryb-hash
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TESTS += t_fletcher t_murmur3_32 t_pearson
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TESTS += t_adler t_fletcher t_murmur3_32 t_pearson
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t_adler_LDADD = $(libt) $(libhash)
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t_fletcher_LDADD = $(libt) $(libhash)
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t_murmur3_32_LDADD = $(libt) $(libhash)
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t_pearson_LDADD = $(libt) $(libhash)
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140
t/t_adler.c
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140
t/t_adler.c
Normal file
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@ -0,0 +1,140 @@
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/*-
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* Copyright (c) 2015 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cryb/impl.h"
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#include <stdint.h>
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#include <string.h>
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#include <cryb/hash.h>
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#include "t.h"
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struct t_case {
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const char *desc;
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const char *data;
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size_t len;
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uint32_t sum;
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};
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/***************************************************************************
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* Test cases
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*/
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static struct t_case t_cases[] = {
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{
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.desc = "len == 0",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 0,
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.sum = 0x00000001,
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},
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{
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.desc = "len == 1",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 1,
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.sum = 0x00020002,
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},
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{
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.desc = "len == 2",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 2,
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.sum = 0x00060004,
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},
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{
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.desc = "len == 3",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 3,
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.sum = 0x000d0007,
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},
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{
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.desc = "len == 4",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 4,
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.sum = 0x0018000b,
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},
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{
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.desc = "len == 5",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 5,
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.sum = 0x00280010,
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},
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{
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.desc = "len == 6",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 6,
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.sum = 0x003e0016,
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},
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{
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.desc = "len == 7",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 7,
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.sum = 0x005b001d,
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},
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{
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.desc = "len == 8",
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.data = "\x01\x02\x03\x04\x05\x06\x07\x08",
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.len = 8,
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.sum = 0x00800025,
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},
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};
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/***************************************************************************
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* Test function
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*/
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static int
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t_adler(char **desc CRYB_UNUSED, void *arg)
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{
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struct t_case *t = arg;
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int ret;
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ret = t_compare_x32(t->sum, adler32_hash(t->data, t->len));
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return (ret);
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}
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/***************************************************************************
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* Boilerplate
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*/
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int
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t_prepare(int argc, char *argv[])
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{
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int i, n;
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(void)argc;
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(void)argv;
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n = sizeof t_cases / sizeof t_cases[0];
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for (i = 0; i < n; ++i)
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t_add_test(t_adler, &t_cases[i], t_cases[i].desc);
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return (0);
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}
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void
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t_cleanup(void)
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{
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}
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