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/* $OpenBSD: login_token.c,v 1.5 2001/12/07 17:16:18 millert Exp $ */
/*-
* Copyright (c) 1995, 1996 Berkeley Software Design, Inc. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Berkeley Software Design,
* Inc.
* 4. The name of Berkeley Software Design, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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.
*
* BSDI $From: login_token.c,v 1.2 1996/09/04 05:33:05 prb Exp $
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <readpassphrase.h>
#include <signal.h>
#include <stdio.h>
#include <syslog.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <login_cap.h>
#include <bsd_auth.h>
#include "token.h"
int
main(argc, argv)
int argc;
char **argv;
{
FILE *back = NULL;
char *class = 0;
char *username = 0;
char *instance;
char challenge[1024];
char response[1024];
char *pp = 0;
int c;
int mode = 0;
struct rlimit cds;
sigset_t blockset;
(void)setpriority(PRIO_PROCESS, 0, 0);
/* We block keyboard-generated signals during database accesses. */
sigemptyset(&blockset);
sigaddset(&blockset, SIGINT);
sigaddset(&blockset, SIGQUIT);
sigaddset(&blockset, SIGTSTP);
openlog(NULL, LOG_ODELAY, LOG_AUTH);
cds.rlim_cur = 0;
cds.rlim_max = 0;
if (setrlimit(RLIMIT_CORE, &cds) < 0)
syslog(LOG_ERR, "couldn't set core dump size to 0: %m");
(void)sigprocmask(SIG_BLOCK, &blockset, NULL);
if (token_init(argv[0]) < 0) {
syslog(LOG_ERR, "unknown token type");
errx(1, "unknown token type");
}
(void)sigprocmask(SIG_UNBLOCK, &blockset, NULL);
while ((c = getopt(argc, argv, "ds:v:")) != -1)
switch(c) {
case 'd': /* to remain undocumented */
back = stdout;
break;
case 'v':
break;
case 's': /* service */
if (strcmp(optarg, "login") == 0)
mode = 0;
else if (strcmp(optarg, "challenge") == 0)
mode = 1;
else if (strcmp(optarg, "response") == 0)
mode = 2;
else {
syslog(LOG_ERR, "%s: invalid service", optarg);
exit(1);
}
break;
default:
syslog(LOG_ERR, "usage error");
exit(1);
}
switch(argc - optind) {
case 2:
class = argv[optind + 1];
case 1:
username = argv[optind];
break;
default:
syslog(LOG_ERR, "usage error");
exit(1);
}
if (back == NULL && (back = fdopen(3, "r+")) == NULL) {
syslog(LOG_ERR, "reopening back channel");
exit(1);
}
if (mode == 2) {
mode = 0;
c = -1;
while (++c < sizeof(challenge) &&
read(3, &challenge[c], 1) == 1) {
if (challenge[c] == '\0' && ++mode == 2)
break;
if (challenge[c] == '\0' && mode == 1)
pp = challenge + c + 1;
}
if (mode < 2) {
syslog(LOG_ERR, "protocol error on back channel");
exit(1);
}
} else {
(void)sigprocmask(SIG_BLOCK, &blockset, NULL);
tokenchallenge(username, challenge, sizeof(challenge),
tt->proper);
(void)sigprocmask(SIG_UNBLOCK, &blockset, NULL);
if (mode == 1) {
fprintf(back, BI_VALUE " challenge %s\n",
auth_mkvalue(challenge));
fprintf(back, BI_CHALLENGE "\n");
exit(0);
}
pp = readpassphrase(challenge, response, sizeof(response), 0);
if (!pp || *pp == '\0') {
char buf[64];
snprintf(buf, sizeof(buf), "%s Response [echo on]: ",
tt->proper);
pp = readpassphrase(buf, response, sizeof(response),
RPP_ECHO_ON);
}
}
(void)sigprocmask(SIG_BLOCK, &blockset, NULL);
if (tokenverify(username, challenge, pp) == 0) {
fprintf(back, BI_AUTH "\n");
if ((instance = strchr(username, '.'))) {
*instance++ = 0;
if (strcmp(instance, "root") == 0)
fprintf(back, BI_ROOTOKAY "\n");
}
fprintf(back, BI_SECURE "\n");
exit(0);
}
fprintf(back, BI_REJECT "\n");
exit(1);
}
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