mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-25 03:12:10 +00:00
ded319cca2
[auth-rsa.c auth-shadow.c auth-sia.c auth1.c auth2-chall.c] [auth2-gss.c auth2-kbdint.c auth2-none.c authfd.c authfile.c] [cipher-3des1.c cipher-aes.c cipher-bf1.c cipher-ctr.c clientloop.c] [dh.c dns.c entropy.c gss-serv-krb5.c gss-serv.c hostfile.c kex.c] [kexdhc.c kexdhs.c kexgexc.c kexgexs.c key.c loginrec.c mac.c] [md5crypt.c monitor.c monitor_wrap.c readconf.c rsa.c] [scard-opensc.c scard.c session.c ssh-add.c ssh-agent.c ssh-dss.c] [ssh-keygen.c ssh-keysign.c ssh-rsa.c ssh.c sshconnect.c] [sshconnect1.c sshconnect2.c sshd.c rc4.diff] [openbsd-compat/bsd-cray.c openbsd-compat/port-aix.c] [openbsd-compat/port-linux.c openbsd-compat/port-solaris.c] [openbsd-compat/port-uw.c] Lots of headers for SCO OSR6, mainly adding stdarg.h for log.h; compile problems reported by rac AT tenzing.org
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/* $OpenBSD: auth-chall.c,v 1.12 2006/08/03 03:34:41 deraadt Exp $ */
|
|
/*
|
|
* Copyright (c) 2001 Markus Friedl. 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 ``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 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.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdarg.h>
|
|
|
|
#include "xmalloc.h"
|
|
#include "key.h"
|
|
#include "hostfile.h"
|
|
#include "auth.h"
|
|
#include "log.h"
|
|
#include "servconf.h"
|
|
|
|
/* limited protocol v1 interface to kbd-interactive authentication */
|
|
|
|
extern KbdintDevice *devices[];
|
|
static KbdintDevice *device;
|
|
extern ServerOptions options;
|
|
|
|
char *
|
|
get_challenge(Authctxt *authctxt)
|
|
{
|
|
char *challenge, *name, *info, **prompts;
|
|
u_int i, numprompts;
|
|
u_int *echo_on;
|
|
|
|
#ifdef USE_PAM
|
|
if (!options.use_pam)
|
|
remove_kbdint_device("pam");
|
|
#endif
|
|
|
|
device = devices[0]; /* we always use the 1st device for protocol 1 */
|
|
if (device == NULL)
|
|
return NULL;
|
|
if ((authctxt->kbdintctxt = device->init_ctx(authctxt)) == NULL)
|
|
return NULL;
|
|
if (device->query(authctxt->kbdintctxt, &name, &info,
|
|
&numprompts, &prompts, &echo_on)) {
|
|
device->free_ctx(authctxt->kbdintctxt);
|
|
authctxt->kbdintctxt = NULL;
|
|
return NULL;
|
|
}
|
|
if (numprompts < 1)
|
|
fatal("get_challenge: numprompts < 1");
|
|
challenge = xstrdup(prompts[0]);
|
|
for (i = 0; i < numprompts; i++)
|
|
xfree(prompts[i]);
|
|
xfree(prompts);
|
|
xfree(name);
|
|
xfree(echo_on);
|
|
xfree(info);
|
|
|
|
return (challenge);
|
|
}
|
|
int
|
|
verify_response(Authctxt *authctxt, const char *response)
|
|
{
|
|
char *resp[1], *name, *info, **prompts;
|
|
u_int i, numprompts, *echo_on;
|
|
int authenticated = 0;
|
|
|
|
if (device == NULL)
|
|
return 0;
|
|
if (authctxt->kbdintctxt == NULL)
|
|
return 0;
|
|
resp[0] = (char *)response;
|
|
switch (device->respond(authctxt->kbdintctxt, 1, resp)) {
|
|
case 0: /* Success */
|
|
authenticated = 1;
|
|
break;
|
|
case 1: /* Postponed - retry with empty query for PAM */
|
|
if ((device->query(authctxt->kbdintctxt, &name, &info,
|
|
&numprompts, &prompts, &echo_on)) != 0)
|
|
break;
|
|
if (numprompts == 0 &&
|
|
device->respond(authctxt->kbdintctxt, 0, resp) == 0)
|
|
authenticated = 1;
|
|
|
|
for (i = 0; i < numprompts; i++)
|
|
xfree(prompts[i]);
|
|
xfree(prompts);
|
|
xfree(name);
|
|
xfree(echo_on);
|
|
xfree(info);
|
|
break;
|
|
}
|
|
device->free_ctx(authctxt->kbdintctxt);
|
|
authctxt->kbdintctxt = NULL;
|
|
return authenticated;
|
|
}
|
|
void
|
|
abandon_challenge_response(Authctxt *authctxt)
|
|
{
|
|
if (authctxt->kbdintctxt != NULL) {
|
|
device->free_ctx(authctxt->kbdintctxt);
|
|
authctxt->kbdintctxt = NULL;
|
|
}
|
|
}
|