blob: 983ea76f44bc0977c583c4685e7dddd6a2e5f7b2 [file] [log] [blame]
/* 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, D. R. Commander.
* Modifications are under the same license as the original code (see above)
* ----------------------------------------------------------------------------
*/
#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"
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);
#if _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));
}
char *
MD5Data (const void *data, unsigned int len, char *buf)
{
MD5_CTX ctx;
MD5Init(&ctx);
MD5Update(&ctx,data,len);
return (MD5End(&ctx, buf));
}