[openssh.git] / auth2-chall.c

/*
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2001 Per Allansson.  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"
RCSID("$OpenBSD: auth2-chall.c,v 1.20 2002/06/30 21:59:45 deraadt Exp $");

#include "ssh2.h"
#include "auth.h"
#include "buffer.h"
#include "packet.h"
#include "xmalloc.h"
#include "dispatch.h"
#include "auth.h"
#include "log.h"

static int auth2_challenge_start(Authctxt *);
static int send_userauth_info_request(Authctxt *);
static void input_userauth_info_response(int, u_int32_t, void *);

#ifdef BSD_AUTH
extern KbdintDevice bsdauth_device;
#else
#ifdef SKEY
extern KbdintDevice skey_device;
#endif
#endif

KbdintDevice *devices[] = {
#ifdef BSD_AUTH
	&bsdauth_device,
#else
#ifdef SKEY
	&skey_device,
#endif
#endif
	NULL
};

typedef struct KbdintAuthctxt KbdintAuthctxt;
struct KbdintAuthctxt
{
	char *devices;
	void *ctxt;
	KbdintDevice *device;
	u_int nreq;
};

static KbdintAuthctxt *
kbdint_alloc(const char *devs)
{
	KbdintAuthctxt *kbdintctxt;
	Buffer b;
	int i;

	kbdintctxt = xmalloc(sizeof(KbdintAuthctxt));
	if (strcmp(devs, "") == 0) {
		buffer_init(&b);
		for (i = 0; devices[i]; i++) {
			if (buffer_len(&b) > 0)
				buffer_append(&b, ",", 1);
			buffer_append(&b, devices[i]->name,
			    strlen(devices[i]->name));
		}
		buffer_append(&b, "\0", 1);
		kbdintctxt->devices = xstrdup(buffer_ptr(&b));
		buffer_free(&b);
	} else {
		kbdintctxt->devices = xstrdup(devs);
	}
	debug("kbdint_alloc: devices '%s'", kbdintctxt->devices);
	kbdintctxt->ctxt = NULL;
	kbdintctxt->device = NULL;
	kbdintctxt->nreq = 0;

	return kbdintctxt;
}
static void
kbdint_reset_device(KbdintAuthctxt *kbdintctxt)
{
	if (kbdintctxt->ctxt) {
		kbdintctxt->device->free_ctx(kbdintctxt->ctxt);
		kbdintctxt->ctxt = NULL;
	}
	kbdintctxt->device = NULL;
}
static void
kbdint_free(KbdintAuthctxt *kbdintctxt)
{
	if (kbdintctxt->device)
		kbdint_reset_device(kbdintctxt);
	if (kbdintctxt->devices) {
		xfree(kbdintctxt->devices);
		kbdintctxt->devices = NULL;
	}
	xfree(kbdintctxt);
}
/* get next device */
static int
kbdint_next_device(KbdintAuthctxt *kbdintctxt)
{
	size_t len;
	char *t;
	int i;

	if (kbdintctxt->device)
		kbdint_reset_device(kbdintctxt);
	do {
		len = kbdintctxt->devices ?
		    strcspn(kbdintctxt->devices, ",") : 0;

		if (len == 0)
			break;
		for (i = 0; devices[i]; i++)
			if (strncmp(kbdintctxt->devices, devices[i]->name, len) == 0)
				kbdintctxt->device = devices[i];
		t = kbdintctxt->devices;
		kbdintctxt->devices = t[len] ? xstrdup(t+len+1) : NULL;
		xfree(t);
		debug2("kbdint_next_device: devices %s", kbdintctxt->devices ?
		   kbdintctxt->devices : "<empty>");
	} while (kbdintctxt->devices && !kbdintctxt->device);

	return kbdintctxt->device ? 1 : 0;
}

/*
 * try challenge-response, set authctxt->postponed if we have to
 * wait for the response.
 */
int
auth2_challenge(Authctxt *authctxt, char *devs)
{
	debug("auth2_challenge: user=%s devs=%s",
	    authctxt->user ? authctxt->user : "<nouser>",
	    devs ? devs : "<no devs>");

	if (authctxt->user == NULL || !devs)
		return 0;
	if (authctxt->kbdintctxt == NULL)
		authctxt->kbdintctxt = kbdint_alloc(devs);
	return auth2_challenge_start(authctxt);
}

/* unregister kbd-int callbacks and context */
void
auth2_challenge_stop(Authctxt *authctxt)
{
	/* unregister callback */
	dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, NULL);
	if (authctxt->kbdintctxt != NULL)  {
		kbdint_free(authctxt->kbdintctxt);
		authctxt->kbdintctxt = NULL;
	}
}

/* side effect: sets authctxt->postponed if a reply was sent*/
static int
auth2_challenge_start(Authctxt *authctxt)
{
	KbdintAuthctxt *kbdintctxt = authctxt->kbdintctxt;

	debug2("auth2_challenge_start: devices %s",
	    kbdintctxt->devices ?  kbdintctxt->devices : "<empty>");

	if (kbdint_next_device(kbdintctxt) == 0) {
		auth2_challenge_stop(authctxt);
		return 0;
	}
	debug("auth2_challenge_start: trying authentication method '%s'",
	    kbdintctxt->device->name);

	if ((kbdintctxt->ctxt = kbdintctxt->device->init_ctx(authctxt)) == NULL) {
		auth2_challenge_stop(authctxt);
		return 0;
	}
	if (send_userauth_info_request(authctxt) == 0) {
		auth2_challenge_stop(authctxt);
		return 0;
	}
	dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE,
	    &input_userauth_info_response);

	authctxt->postponed = 1;
	return 0;
}

static int
send_userauth_info_request(Authctxt *authctxt)
{
	KbdintAuthctxt *kbdintctxt;
	char *name, *instr, **prompts;
	int i;
	u_int *echo_on;

	kbdintctxt = authctxt->kbdintctxt;
	if (kbdintctxt->device->query(kbdintctxt->ctxt,
	    &name, &instr, &kbdintctxt->nreq, &prompts, &echo_on))
		return 0;

	packet_start(SSH2_MSG_USERAUTH_INFO_REQUEST);
	packet_put_cstring(name);
	packet_put_cstring(instr);
	packet_put_cstring("");		/* language not used */
	packet_put_int(kbdintctxt->nreq);
	for (i = 0; i < kbdintctxt->nreq; i++) {
		packet_put_cstring(prompts[i]);
		packet_put_char(echo_on[i]);
	}
	packet_send();
	packet_write_wait();

	for (i = 0; i < kbdintctxt->nreq; i++)
		xfree(prompts[i]);
	xfree(prompts);
	xfree(echo_on);
	xfree(name);
	xfree(instr);
	return 1;
}

static void
input_userauth_info_response(int type, u_int32_t seq, void *ctxt)
{
	Authctxt *authctxt = ctxt;
	KbdintAuthctxt *kbdintctxt;
	int i, authenticated = 0, res, len;
	u_int nresp;
	char **response = NULL, *method;

	if (authctxt == NULL)
		fatal("input_userauth_info_response: no authctxt");
	kbdintctxt = authctxt->kbdintctxt;
	if (kbdintctxt == NULL || kbdintctxt->ctxt == NULL)
		fatal("input_userauth_info_response: no kbdintctxt");
	if (kbdintctxt->device == NULL)
		fatal("input_userauth_info_response: no device");

	authctxt->postponed = 0;	/* reset */
	nresp = packet_get_int();
	if (nresp != kbdintctxt->nreq)
		fatal("input_userauth_info_response: wrong number of replies");
	if (nresp > 100)
		fatal("input_userauth_info_response: too many replies");
	if (nresp > 0) {
		response = xmalloc(nresp * sizeof(char *));
		for (i = 0; i < nresp; i++)
			response[i] = packet_get_string(NULL);
	}
	packet_check_eom();

	if (authctxt->valid) {
		res = kbdintctxt->device->respond(kbdintctxt->ctxt,
		    nresp, response);
	} else {
		res = -1;
	}

	for (i = 0; i < nresp; i++) {
		memset(response[i], 'r', strlen(response[i]));
		xfree(response[i]);
	}
	if (response)
		xfree(response);

	switch (res) {
	case 0:
		/* Success! */
		authenticated = 1;
		break;
	case 1:
		/* Authentication needs further interaction */
		if (send_userauth_info_request(authctxt) == 1)
			authctxt->postponed = 1;
		break;
	default:
		/* Failure! */
		break;
	}

	len = strlen("keyboard-interactive") + 2 +
		strlen(kbdintctxt->device->name);
	method = xmalloc(len);
	snprintf(method, len, "keyboard-interactive/%s",
	    kbdintctxt->device->name);

	if (!authctxt->postponed) {
		if (authenticated) {
			auth2_challenge_stop(authctxt);
		} else {
			/* start next device */
			/* may set authctxt->postponed */
			auth2_challenge_start(authctxt);
		}
	}
	userauth_finish(authctxt, authenticated, method);
	xfree(method);
}

void
privsep_challenge_enable(void)
{
#ifdef BSD_AUTH
	extern KbdintDevice mm_bsdauth_device;
#endif
#ifdef SKEY
	extern KbdintDevice mm_skey_device;
#endif
	/* As long as SSHv1 has devices[0] hard coded this is fine */
#ifdef BSD_AUTH
	devices[0] = &mm_bsdauth_device;
#else
#ifdef SKEY
	devices[0] = &mm_skey_device;
#endif
#endif
}
Commit	Line	Data
59c97189	1	/*
f3c7c613	2	* Copyright (c) 2001 Markus Friedl. All rights reserved.
5ba55ada	3	* Copyright (c) 2001 Per Allansson. All rights reserved.
59c97189	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	17	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25	#include "includes.h"
343288b8	26	RCSID("$OpenBSD: auth2-chall.c,v 1.20 2002/06/30 21:59:45 deraadt Exp $");
59c97189	27
59c97189	28	#include "ssh2.h"
59c97189	29	#include "auth.h"
3469eac4	30	#include "buffer.h"
59c97189	31	#include "packet.h"
	32	#include "xmalloc.h"
	33	#include "dispatch.h"
5ba55ada	34	#include "auth.h"
42f11eb2	35	#include "log.h"
59c97189	36
396c147e	37	static int auth2_challenge_start(Authctxt *);
396c147e	38	static int send_userauth_info_request(Authctxt *);
7819b5c3	39	static void input_userauth_info_response(int, u_int32_t, void *);
5ba55ada	40
	41	#ifdef BSD_AUTH
	42	extern KbdintDevice bsdauth_device;
	43	#else
	44	#ifdef SKEY
	45	extern KbdintDevice skey_device;
	46	#endif
	47	#endif
	48
	49	KbdintDevice *devices[] = {
	50	#ifdef BSD_AUTH
	51	&bsdauth_device,
	52	#else
	53	#ifdef SKEY
	54	&skey_device,
	55	#endif
	56	#endif
	57	NULL
	58	};
	59
	60	typedef struct KbdintAuthctxt KbdintAuthctxt;
	61	struct KbdintAuthctxt
	62	{
	63	char *devices;
	64	void *ctxt;
	65	KbdintDevice *device;
477edc5d	66	u_int nreq;
5ba55ada	67	};
5ba55ada	68
396c147e	69	static KbdintAuthctxt *
5ba55ada	70	kbdint_alloc(const char *devs)
	71	{
	72	KbdintAuthctxt *kbdintctxt;
3469eac4	73	Buffer b;
5ba55ada	74	int i;
5ba55ada	75
	76	kbdintctxt = xmalloc(sizeof(KbdintAuthctxt));
	77	if (strcmp(devs, "") == 0) {
3469eac4	78	buffer_init(&b);
5ba55ada	79	for (i = 0; devices[i]; i++) {
3469eac4	80	if (buffer_len(&b) > 0)
	81	buffer_append(&b, ",", 1);
	82	buffer_append(&b, devices[i]->name,
	83	strlen(devices[i]->name));
5ba55ada	84	}
3469eac4	85	buffer_append(&b, "\0", 1);
	86	kbdintctxt->devices = xstrdup(buffer_ptr(&b));
	87	buffer_free(&b);
5ba55ada	88	} else {
	89	kbdintctxt->devices = xstrdup(devs);
	90	}
3469eac4	91	debug("kbdint_alloc: devices '%s'", kbdintctxt->devices);
5ba55ada	92	kbdintctxt->ctxt = NULL;
5ba55ada	93	kbdintctxt->device = NULL;
477edc5d	94	kbdintctxt->nreq = 0;
5ba55ada	95
	96	return kbdintctxt;
	97	}
396c147e	98	static void
5ba55ada	99	kbdint_reset_device(KbdintAuthctxt *kbdintctxt)
	100	{
	101	if (kbdintctxt->ctxt) {
	102	kbdintctxt->device->free_ctx(kbdintctxt->ctxt);
	103	kbdintctxt->ctxt = NULL;
	104	}
	105	kbdintctxt->device = NULL;
	106	}
396c147e	107	static void
5ba55ada	108	kbdint_free(KbdintAuthctxt *kbdintctxt)
	109	{
	110	if (kbdintctxt->device)
	111	kbdint_reset_device(kbdintctxt);
	112	if (kbdintctxt->devices) {
	113	xfree(kbdintctxt->devices);
	114	kbdintctxt->devices = NULL;
	115	}
	116	xfree(kbdintctxt);
	117	}
	118	/* get next device */
396c147e	119	static int
5ba55ada	120	kbdint_next_device(KbdintAuthctxt *kbdintctxt)
	121	{
	122	size_t len;
	123	char *t;
	124	int i;
	125
	126	if (kbdintctxt->device)
	127	kbdint_reset_device(kbdintctxt);
	128	do {
	129	len = kbdintctxt->devices ?
	130	strcspn(kbdintctxt->devices, ",") : 0;
	131
	132	if (len == 0)
	133	break;
	134	for (i = 0; devices[i]; i++)
	135	if (strncmp(kbdintctxt->devices, devices[i]->name, len) == 0)
	136	kbdintctxt->device = devices[i];
	137	t = kbdintctxt->devices;
	138	kbdintctxt->devices = t[len] ? xstrdup(t+len+1) : NULL;
	139	xfree(t);
	140	debug2("kbdint_next_device: devices %s", kbdintctxt->devices ?
	141	kbdintctxt->devices : "<empty>");
	142	} while (kbdintctxt->devices && !kbdintctxt->device);
	143
	144	return kbdintctxt->device ? 1 : 0;
	145	}
59c97189	146
59c97189	147	/*
aa8003d6	148	* try challenge-response, set authctxt->postponed if we have to
59c97189	149	* wait for the response.
	150	*/
	151	int
	152	auth2_challenge(Authctxt authctxt, char devs)
	153	{
5ba55ada	154	debug("auth2_challenge: user=%s devs=%s",
	155	authctxt->user ? authctxt->user : "<nouser>",
	156	devs ? devs : "<no devs>");
	157
f5e69c65	158	if (authctxt->user == NULL \|\| !devs)
5ba55ada	159	return 0;
184eed6a	160	if (authctxt->kbdintctxt == NULL)
5ba55ada	161	authctxt->kbdintctxt = kbdint_alloc(devs);
	162	return auth2_challenge_start(authctxt);
	163	}
	164
2f293d43	165	/* unregister kbd-int callbacks and context */
	166	void
	167	auth2_challenge_stop(Authctxt *authctxt)
	168	{
	169	/* unregister callback */
	170	dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, NULL);
	171	if (authctxt->kbdintctxt != NULL) {
	172	kbdint_free(authctxt->kbdintctxt);
	173	authctxt->kbdintctxt = NULL;
	174	}
	175	}
	176
5ba55ada	177	/* side effect: sets authctxt->postponed if a reply was sent*/
	178	static int
	179	auth2_challenge_start(Authctxt *authctxt)
	180	{
	181	KbdintAuthctxt *kbdintctxt = authctxt->kbdintctxt;
	182
	183	debug2("auth2_challenge_start: devices %s",
	184	kbdintctxt->devices ? kbdintctxt->devices : "<empty>");
	185
	186	if (kbdint_next_device(kbdintctxt) == 0) {
2f293d43	187	auth2_challenge_stop(authctxt);
5ba55ada	188	return 0;
	189	}
	190	debug("auth2_challenge_start: trying authentication method '%s'",
	191	kbdintctxt->device->name);
59c97189	192
5ba55ada	193	if ((kbdintctxt->ctxt = kbdintctxt->device->init_ctx(authctxt)) == NULL) {
2f293d43	194	auth2_challenge_stop(authctxt);
59c97189	195	return 0;
5ba55ada	196	}
5ba55ada	197	if (send_userauth_info_request(authctxt) == 0) {
2f293d43	198	auth2_challenge_stop(authctxt);
59c97189	199	return 0;
5ba55ada	200	}
59c97189	201	dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE,
59c97189	202	&input_userauth_info_response);
5ba55ada	203
59c97189	204	authctxt->postponed = 1;
	205	return 0;
	206	}
	207
5ba55ada	208	static int
5ba55ada	209	send_userauth_info_request(Authctxt *authctxt)
59c97189	210	{
5ba55ada	211	KbdintAuthctxt *kbdintctxt;
	212	char name, instr, **prompts;
	213	int i;
477edc5d	214	u_int *echo_on;
5ba55ada	215
	216	kbdintctxt = authctxt->kbdintctxt;
	217	if (kbdintctxt->device->query(kbdintctxt->ctxt,
477edc5d	218	&name, &instr, &kbdintctxt->nreq, &prompts, &echo_on))
5ba55ada	219	return 0;
59c97189	220
59c97189	221	packet_start(SSH2_MSG_USERAUTH_INFO_REQUEST);
5ba55ada	222	packet_put_cstring(name);
5ba55ada	223	packet_put_cstring(instr);
7203d6bb	224	packet_put_cstring(""); /* language not used */
477edc5d	225	packet_put_int(kbdintctxt->nreq);
477edc5d	226	for (i = 0; i < kbdintctxt->nreq; i++) {
5ba55ada	227	packet_put_cstring(prompts[i]);
	228	packet_put_char(echo_on[i]);
	229	}
59c97189	230	packet_send();
59c97189	231	packet_write_wait();
5ba55ada	232
477edc5d	233	for (i = 0; i < kbdintctxt->nreq; i++)
5ba55ada	234	xfree(prompts[i]);
	235	xfree(prompts);
	236	xfree(echo_on);
	237	xfree(name);
	238	xfree(instr);
	239	return 1;
59c97189	240	}
59c97189	241
5ba55ada	242	static void
7819b5c3	243	input_userauth_info_response(int type, u_int32_t seq, void *ctxt)
59c97189	244	{
59c97189	245	Authctxt *authctxt = ctxt;
5ba55ada	246	KbdintAuthctxt *kbdintctxt;
	247	int i, authenticated = 0, res, len;
	248	u_int nresp;
	249	char *response = NULL, method;
59c97189	250
	251	if (authctxt == NULL)
	252	fatal("input_userauth_info_response: no authctxt");
5ba55ada	253	kbdintctxt = authctxt->kbdintctxt;
	254	if (kbdintctxt == NULL \|\| kbdintctxt->ctxt == NULL)
	255	fatal("input_userauth_info_response: no kbdintctxt");
	256	if (kbdintctxt->device == NULL)
	257	fatal("input_userauth_info_response: no device");
59c97189	258
	259	authctxt->postponed = 0; /* reset */
	260	nresp = packet_get_int();
477edc5d	261	if (nresp != kbdintctxt->nreq)
	262	fatal("input_userauth_info_response: wrong number of replies");
	263	if (nresp > 100)
	264	fatal("input_userauth_info_response: too many replies");
5ba55ada	265	if (nresp > 0) {
343288b8	266	response = xmalloc(nresp * sizeof(char *));
5ba55ada	267	for (i = 0; i < nresp; i++)
	268	response[i] = packet_get_string(NULL);
	269	}
95500969	270	packet_check_eom();
5ba55ada	271
	272	if (authctxt->valid) {
	273	res = kbdintctxt->device->respond(kbdintctxt->ctxt,
	274	nresp, response);
	275	} else {
	276	res = -1;
	277	}
	278
	279	for (i = 0; i < nresp; i++) {
	280	memset(response[i], 'r', strlen(response[i]));
	281	xfree(response[i]);
	282	}
	283	if (response)
59c97189	284	xfree(response);
5ba55ada	285
	286	switch (res) {
	287	case 0:
	288	/* Success! */
	289	authenticated = 1;
	290	break;
	291	case 1:
	292	/* Authentication needs further interaction */
2f293d43	293	if (send_userauth_info_request(authctxt) == 1)
2f293d43	294	authctxt->postponed = 1;
5ba55ada	295	break;
	296	default:
	297	/* Failure! */
	298	break;
59c97189	299	}
5ba55ada	300
	301	len = strlen("keyboard-interactive") + 2 +
	302	strlen(kbdintctxt->device->name);
	303	method = xmalloc(len);
bd2d2ac4	304	snprintf(method, len, "keyboard-interactive/%s",
bd2d2ac4	305	kbdintctxt->device->name);
5ba55ada	306
5ba55ada	307	if (!authctxt->postponed) {
5ba55ada	308	if (authenticated) {
2f293d43	309	auth2_challenge_stop(authctxt);
5ba55ada	310	} else {
	311	/* start next device */
	312	/* may set authctxt->postponed */
	313	auth2_challenge_start(authctxt);
	314	}
	315	}
d9cd3575	316	userauth_finish(authctxt, authenticated, method);
5ba55ada	317	xfree(method);
59c97189	318	}
1853d1ef	319
	320	void
	321	privsep_challenge_enable(void)
	322	{
	323	#ifdef BSD_AUTH
	324	extern KbdintDevice mm_bsdauth_device;
	325	#endif
	326	#ifdef SKEY
	327	extern KbdintDevice mm_skey_device;
	328	#endif
	329	/* As long as SSHv1 has devices[0] hard coded this is fine */
	330	#ifdef BSD_AUTH
	331	devices[0] = &mm_bsdauth_device;
	332	#else
	333	#ifdef SKEY
	334	devices[0] = &mm_skey_device;
	335	#endif
	336	#endif
	337	}