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/***
This file is part of pam_dotfile.
pam_dotfile is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
pam_dotfile is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with pam_dotfile; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
***/
#include <unistd.h>
#include <sys/mman.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "md5util.h"
#include "md5.h"
void fhex(const unsigned char *bin,int len, char *txt) {
const static char hex[] = "0123456789abcdef";
int i;
for (i = 0; i < len; i++) {
txt[i*2] = hex[bin[i]>>4];
txt[i*2+1] = hex[bin[i]&0xF];
}
}
#define MMAPSIZE (100*1024*1024)
#define BUFSIZE (1024*1024)
int fdmd5(int fd, size_t l, char *md) {
void *d;
off_t o = 0;
size_t m;
int r = 0;
md5_state_t s;
md5_init(&s);
m = l < MMAPSIZE ? l : MMAPSIZE;
while (l > 0 && ((d = mmap(NULL, m, PROT_READ, MAP_SHARED, fd, o)) != MAP_FAILED)) {
md5_append(&s, d, m);
munmap(d, m);
o += m;
l -= m;
m = l < MMAPSIZE ? l : MMAPSIZE;
}
if (l > 0) {
void *p;
fprintf(stderr, "mmap() failed: %s\n", strerror(errno));
if (!(p = malloc(BUFSIZE)))
r = -1;
else {
for (;;) {
ssize_t r;
if ((r = read(fd, p, BUFSIZE)) < 0) {
fprintf(stderr, "read(): %s\n", strerror(errno));
free(p);
return -1;
}
if (!r)
break;
md5_append(&s, p, r);
}
free(p);
}
}
md5_finish(&s, md);
return r;
}
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