1103098Sphk/* mdXhl.c * ----------------------------------------------------------------------------
21802Sphk * "THE BEER-WARE LICENSE" (Revision 42):
393149Sphk * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
41802Sphk * can do whatever you want with this stuff. If we meet some day, and you think
51802Sphk * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
61802Sphk * ----------------------------------------------------------------------------
71802Sphk */
81802Sphk
984211Sdillon#include <sys/cdefs.h>
1084211Sdillon__FBSDID("$FreeBSD$");
1184211Sdillon
126684Sphk#include <sys/types.h>
1374385Sphk#include <sys/stat.h>
1419168Sbde#include <fcntl.h>
156684Sphk#include <unistd.h>
161802Sphk
1719168Sbde#include <errno.h>
1819168Sbde#include <stdio.h>
1919168Sbde#include <stdlib.h>
2019168Sbde
2119168Sbde#include "mdX.h"
2219168Sbde
231802Sphkchar *
249488SphkMDXEnd(MDX_CTX *ctx, char *buf)
251802Sphk{
26103098Sphk	int i;
27103098Sphk	unsigned char digest[LENGTH];
28103098Sphk	static const char hex[]="0123456789abcdef";
298870Srgrimes
30103098Sphk	if (!buf)
31103098Sphk		buf = malloc(2*LENGTH + 1);
32103098Sphk	if (!buf)
33103098Sphk		return 0;
34103098Sphk	MDXFinal(digest, ctx);
35103098Sphk	for (i = 0; i < LENGTH; i++) {
36103098Sphk		buf[i+i] = hex[digest[i] >> 4];
37103098Sphk		buf[i+i+1] = hex[digest[i] & 0x0f];
38103098Sphk	}
39103098Sphk	buf[i+i] = '\0';
40103098Sphk	return buf;
411802Sphk}
421802Sphk
431802Sphkchar *
4444290SwollmanMDXFile(const char *filename, char *buf)
451802Sphk{
46103098Sphk	return (MDXFileChunk(filename, buf, 0, 0));
4774385Sphk}
4874385Sphk
4974385Sphkchar *
5074385SphkMDXFileChunk(const char *filename, char *buf, off_t ofs, off_t len)
5174385Sphk{
52103098Sphk	unsigned char buffer[BUFSIZ];
53103098Sphk	MDX_CTX ctx;
54103098Sphk	struct stat stbuf;
55103098Sphk	int f, i, e;
56103098Sphk	off_t n;
571802Sphk
58103098Sphk	MDXInit(&ctx);
59103098Sphk	f = open(filename, O_RDONLY);
60103098Sphk	if (f < 0)
61103098Sphk		return 0;
62103098Sphk	if (fstat(f, &stbuf) < 0)
63103098Sphk		return 0;
64103098Sphk	if (ofs > stbuf.st_size)
65103098Sphk		ofs = stbuf.st_size;
66103098Sphk	if ((len == 0) || (len > stbuf.st_size - ofs))
67103098Sphk		len = stbuf.st_size - ofs;
68103098Sphk	if (lseek(f, ofs, SEEK_SET) < 0)
69103098Sphk		return 0;
70103098Sphk	n = len;
71103098Sphk	i = 0;
72103098Sphk	while (n > 0) {
73103098Sphk		if (n > sizeof(buffer))
74103098Sphk			i = read(f, buffer, sizeof(buffer));
75103098Sphk		else
76103098Sphk			i = read(f, buffer, n);
77103098Sphk		if (i < 0)
78103098Sphk			break;
79103098Sphk		MDXUpdate(&ctx, buffer, i);
80103098Sphk		n -= i;
81103098Sphk	}
82103098Sphk	e = errno;
83103098Sphk	close(f);
84103098Sphk	errno = e;
85103098Sphk	if (i < 0)
86103098Sphk		return 0;
87103098Sphk	return (MDXEnd(&ctx, buf));
881802Sphk}
891802Sphk
901802Sphkchar *
91154479SphkMDXData (const void *data, unsigned int len, char *buf)
921802Sphk{
93103098Sphk	MDX_CTX ctx;
941802Sphk
95103098Sphk	MDXInit(&ctx);
96103098Sphk	MDXUpdate(&ctx,data,len);
97103098Sphk	return (MDXEnd(&ctx, buf));
981802Sphk}
99