freebsd-nq/sbin/iscontrol/misc.c
Pierre Beyssac 7a21dee3c2 Fix a bug in hexadecimal formatting of the CHAP digest: bytes >= 0x80
were formatted as 0xff, causing the authentication to fail.

Reviewed by:	scottl
MFC after:	1 week
2008-02-05 23:42:38 +00:00

226 lines
5.0 KiB
C

/*-
* Copyright (c) 2005 Daniel Braniss <danny@cs.huji.ac.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
/*
| $Id: misc.c,v 2.1 2006/11/12 08:06:51 danny Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#if __FreeBSD_version < 500000
#include <sys/time.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
static inline char
c2b(unsigned char c)
{
switch(c) {
case '0' ... '9':
return c - '0';
case 'a' ... 'f':
return c - 'a' + 10;
case 'A' ... 'F':
return c - 'A' + 10;
}
return 0;
}
static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
static __inline unsigned char
c64tobin(unsigned char c64)
{
int i;
for(i = 0; i < 64; i++)
if(base64[i] == c64)
break;
return i;
}
/*
| according to rfc3720, the binary string
| cannot be larger than 1024 - but i can't find it :-) XXX
| not enforced yet.
*/
int
str2bin(char *str, char **rsp)
{
char *src, *dst, *tmp;
int i, len = 0;
src = str;
tmp = NULL;
if(strncasecmp("0x", src, 2) == 0) {
src += 2;
len = strlen(src);
if((tmp = malloc((len+1)/2)) == NULL) {
// XXX: print some error?
return 0;
}
dst = tmp;
if(len & 1)
*dst++ = c2b(*src++);
while(*src) {
*dst = c2b(*src++) << 4;
*dst++ |= c2b(*src++);
}
len = dst - tmp;
} else
if(strncasecmp("0b", src , 2) == 0) {
// base64
unsigned char b6;
src += 2;
len = strlen(src) / 4 * 3;
if((tmp = malloc(len)) == NULL) {
// XXX: print some error?
return 0;
}
dst = tmp;
i = 0;
while(*src && ((b6 = c64tobin(*src++)) != 64)) {
switch(i % 4) {
case 0:
*dst = b6 << 2;
break;
case 1:
*dst++ |= b6 >> 4;
*dst = b6 << 4;
break;
case 2:
*dst++ |= b6 >> 2;
*dst = b6 << 6;
break;
case 3:
*dst++ |= b6;
break;
}
i++;
}
len = dst - tmp;
}
else {
/*
| assume it to be an ascii string, so just copy it
*/
len = strlen(str);
if((tmp = malloc(len)) == NULL)
return 0;
dst = tmp;
src = str;
while(*src)
*dst++ = *src++;
}
*rsp = tmp;
return len;
}
char *
bin2str(char *encoding, unsigned char *md, int blen)
{
int len;
unsigned char *dst, *ds, *cp;
if(strncasecmp(encoding, "0x", 2) == 0) {
char ofmt[5];
len = blen * 2;
dst = malloc(len + 3);
strcpy(dst, encoding);
ds = dst + 2;
cp = (char *)md;
sprintf(ofmt, "%%02%c", encoding[1]);
while(blen-- > 0) {
sprintf(ds, ofmt, *cp++);
ds += 2;
}
*ds = 0;
return dst;
}
if(strncasecmp(encoding, "0b", 2) == 0) {
int i, b6;
len = (blen + 2) * 4 / 3;
dst = malloc(len + 3);
strcpy(dst, encoding);
ds = dst + 2;
cp = (char *)md;
b6 = 0; // to keep copiler happy.
for(i = 0; i < blen; i++) {
switch(i % 3) {
case 0:
*ds++ = base64[*cp >> 2];
b6 = (*cp & 0x3) << 4;
break;
case 1:
b6 += (*cp >> 4);
*ds++ = base64[b6];
b6 = (*cp & 0xf) << 2;
break;
case 2:
b6 += (*cp >> 6);
*ds++ = base64[b6];
*ds++ = base64[*cp & 0x3f];
}
cp++;
}
switch(blen % 3) {
case 0:
break;
case 1:
*ds++ = base64[b6];
*ds++ = '=';
*ds++ = '=';
break;
case 2:
*ds++ = base64[b6];
*ds++ = '=';
break;
}
*ds = 0;
return dst;
}
return NULL;
}