7b7254e71f
see: https://docs.freebsd.org/cgi/mid.cgi?20150513080342.GE37063@funkthat.com for benchmarks...
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
/* 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
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "mdX.h"
|
|
|
|
char *
|
|
MDXEnd(MDX_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;
|
|
MDXFinal(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 *
|
|
MDXFile(const char *filename, char *buf)
|
|
{
|
|
return (MDXFileChunk(filename, buf, 0, 0));
|
|
}
|
|
|
|
char *
|
|
MDXFileChunk(const char *filename, char *buf, off_t ofs, off_t len)
|
|
{
|
|
unsigned char buffer[16*1024];
|
|
MDX_CTX ctx;
|
|
struct stat stbuf;
|
|
int f, i, e;
|
|
off_t n;
|
|
|
|
MDXInit(&ctx);
|
|
f = open(filename, O_RDONLY);
|
|
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;
|
|
MDXUpdate(&ctx, buffer, i);
|
|
n -= i;
|
|
}
|
|
e = errno;
|
|
close(f);
|
|
errno = e;
|
|
if (i < 0)
|
|
return 0;
|
|
return (MDXEnd(&ctx, buf));
|
|
}
|
|
|
|
char *
|
|
MDXData (const void *data, unsigned int len, char *buf)
|
|
{
|
|
MDX_CTX ctx;
|
|
|
|
MDXInit(&ctx);
|
|
MDXUpdate(&ctx,data,len);
|
|
return (MDXEnd(&ctx, buf));
|
|
}
|
|
|
|
#ifdef WEAK_REFS
|
|
/* When building libmd, provide weak references. Note: this is not
|
|
activated in the context of compiling these sources for internal
|
|
use in libcrypt.
|
|
*/
|
|
#undef MDXEnd
|
|
__weak_reference(_libmd_MDXEnd, MDXEnd);
|
|
#undef MDXFile
|
|
__weak_reference(_libmd_MDXFile, MDXFile);
|
|
#undef MDXFileChunk
|
|
__weak_reference(_libmd_MDXFileChunk, MDXFileChunk);
|
|
#undef MDXData
|
|
__weak_reference(_libmd_MDXData, MDXData);
|
|
#endif
|