freebsd-dev/sbin/iscontrol/auth_subr.c
Pedro F. Giffuni 1de7b4b805 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

207 lines
4.7 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2005-2010 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: auth_subr.c,v 2.2 2007/06/01 08:09:37 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>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <md5.h>
#include <sha.h>
#include <dev/iscsi_initiator/iscsi.h>
#include "iscontrol.h"
static int
chapMD5(char id, char *cp, char *chapSecret, unsigned char *digest)
{
MD5_CTX ctx;
char *tmp;
int len;
debug_called(3);
MD5Init(&ctx);
MD5Update(&ctx, &id, 1);
if((len = str2bin(chapSecret, &tmp)) == 0) {
// print error
return -1;
}
MD5Update(&ctx, tmp, len);
free(tmp);
if((len = str2bin(cp, &tmp)) == 0) {
// print error
return -1;
}
MD5Update(&ctx, tmp, len);
free(tmp);
MD5Final(digest, &ctx);
return 0;
}
static int
chapSHA1(char id, char *cp, char *chapSecret, unsigned char *digest)
{
SHA1_CTX ctx;
char *tmp;
int len;
debug_called(3);
SHA1_Init(&ctx);
SHA1_Update(&ctx, &id, 1);
if((len = str2bin(chapSecret, &tmp)) == 0) {
// print error
return -1;
}
SHA1_Update(&ctx, tmp, len);
free(tmp);
if((len = str2bin(cp, &tmp)) == 0) {
// print error
return -1;
}
SHA1_Update(&ctx, tmp, len);
free(tmp);
SHA1_Final(digest, &ctx);
return 0;
}
/*
| the input text format can be anything that the rfc3270 defines
| (see section 5.1 and str2bin)
| digest length for md5 is 128bits, and for sha1 is 160bits.
| digest is an ASCII string which represents the bits in
| hexadecimal or base64 according to the challenge(cp) format
*/
char *
chapDigest(char *ap, char id, char *cp, char *chapSecret)
{
int len;
unsigned char digest[20];
char encoding[3];
debug_called(3);
len = 0;
if(strcmp(ap, "5") == 0 && chapMD5(id, cp, chapSecret, digest) == 0)
len = 16;
else
if(strcmp(ap, "7") == 0 && chapSHA1(id, cp, chapSecret, digest) == 0)
len = 20;
if(len) {
sprintf(encoding, "%.2s", cp);
return bin2str(encoding, digest, len);
}
return NULL;
}
char *
genChapChallenge(char *encoding, uint len)
{
int fd;
unsigned char tmp[1024];
if(len > sizeof(tmp))
return NULL;
if((fd = open("/dev/random", O_RDONLY)) != -1) {
read(fd, tmp, len);
close(fd);
return bin2str(encoding, tmp, len);
}
perror("/dev/random");
// make up something ...
return NULL;
}
#ifdef TEST_AUTH
static void
puke(char *str, unsigned char *dg, int len)
{
printf("%3d] %s\n 0x", len, str);
while(len-- > 0)
printf("%02x", *dg++);
printf("\n");
}
main(int cc, char **vv)
{
char *p, *ap, *ip, *cp, *chapSecret, *digest;
int len;
#if 0
ap = "5";
chapSecret = "0xa5aff013dd839b1edd31ee73a1df0b1b";
// chapSecret = "abcdefghijklmnop";
len = str2bin(chapSecret, &cp);
puke(chapSecret, cp, len);
ip = "238";
cp = "0xbd456029";
if((digest = chapDigest(ap, ip, cp, chapSecret)) != NULL) {
len = str2bin(digest, &cp);
puke(digest, cp, len);
}
#else
printf("%d] %s\n", 24, genChallenge("0X", 24));
#endif
}
#endif