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/* mdXhl.c
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
* libjpeg-turbo Modifications:
* Copyright (C)2016, 2018-2019, 2022 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - 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.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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.
* ----------------------------------------------------------------------------
*/
#ifdef _MSC_VER
#define _CRT_SECURE_NO_DEPRECATE
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef _WIN32
#include <io.h>
#define close _close
#define fstat _fstat
#define lseek _lseek
#define read _read
#define stat _stat
#else
#include <unistd.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#define LENGTH 16
#include "./md5.h"
static char *MD5End(MD5_CTX *ctx, char *buf)
{
int i;
unsigned char digest[LENGTH];
static const char hex[] = "0123456789abcdef";
if (!buf)
buf = malloc(2 * LENGTH + 1);
if (!buf)
return 0;
MD5Final(digest, ctx);
for (i = 0; i < LENGTH; i++) {
buf[i + i] = hex[digest[i] >> 4];
buf[i + i + 1] = hex[digest[i] & 0x0f];
}
buf[i + i] = '\0';
return buf;
}
char *MD5File(const char *filename, char *buf)
{
return (MD5FileChunk(filename, buf, 0, 0));
}
char *MD5FileChunk(const char *filename, char *buf, off_t ofs, off_t len)
{
unsigned char buffer[BUFSIZ];
MD5_CTX ctx;
struct stat stbuf;
int f, i, e;
off_t n;
MD5Init(&ctx);
#ifdef _WIN32
f = _open(filename, O_RDONLY | O_BINARY);
#else
f = open(filename, O_RDONLY);
#endif
if (f < 0)
return 0;
if (fstat(f, &stbuf) < 0)
return 0;
if (ofs > stbuf.st_size)
ofs = stbuf.st_size;
if ((len == 0) || (len > stbuf.st_size - ofs))
len = stbuf.st_size - ofs;
if (lseek(f, ofs, SEEK_SET) < 0)
return 0;
n = len;
i = 0;
while (n > 0) {
if (n > sizeof(buffer))
i = read(f, buffer, sizeof(buffer));
else
i = read(f, buffer, n);
if (i < 0)
break;
MD5Update(&ctx, buffer, i);
n -= i;
}
e = errno;
close(f);
errno = e;
if (i < 0)
return 0;
return (MD5End(&ctx, buf));
}
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