[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 1.21 2004/06/01 14:20:45 dtucker Exp $");

#include "ssh2.h"
#include "auth.h"
#include "buffer.h"
#include "packet.h"
#include "xmalloc.h"
#include "dispatch.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 USE_PAM
extern KbdintDevice sshpam_device;
#endif
#ifdef SKEY
extern KbdintDevice skey_device;
#endif
#endif

KbdintDevice *devices[] = {
#ifdef BSD_AUTH
	&bsdauth_device,
#else
#ifdef USE_PAM
	&sshpam_device,
#endif
#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)
{
#if defined(BSD_AUTH) || defined(USE_PAM) || defined(SKEY)
	int n = 0;
#endif
#ifdef BSD_AUTH
	extern KbdintDevice mm_bsdauth_device;
#endif
#ifdef USE_PAM
	extern KbdintDevice mm_sshpam_device;
#endif
#ifdef SKEY
	extern KbdintDevice mm_skey_device;
#endif

#ifdef BSD_AUTH
	devices[n++] = &mm_bsdauth_device;
#else
#ifdef USE_PAM
	devices[n++] = &mm_sshpam_device;
#endif
#ifdef SKEY
	devices[n++] = &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"
87ef1b80	26	RCSID("$OpenBSD: auth2-chall.c,v 1.21 2004/06/01 14:20:45 dtucker 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"
42f11eb2	34	#include "log.h"
59c97189	35
396c147e	36	static int auth2_challenge_start(Authctxt *);
396c147e	37	static int send_userauth_info_request(Authctxt *);
7819b5c3	38	static void input_userauth_info_response(int, u_int32_t, void *);
5ba55ada	39
	40	#ifdef BSD_AUTH
	41	extern KbdintDevice bsdauth_device;
	42	#else
05114c74	43	#ifdef USE_PAM
	44	extern KbdintDevice sshpam_device;
	45	#endif
5ba55ada	46	#ifdef SKEY
	47	extern KbdintDevice skey_device;
	48	#endif
	49	#endif
	50
	51	KbdintDevice *devices[] = {
	52	#ifdef BSD_AUTH
	53	&bsdauth_device,
	54	#else
05114c74	55	#ifdef USE_PAM
	56	&sshpam_device,
	57	#endif
5ba55ada	58	#ifdef SKEY
	59	&skey_device,
	60	#endif
	61	#endif
	62	NULL
	63	};
	64
	65	typedef struct KbdintAuthctxt KbdintAuthctxt;
	66	struct KbdintAuthctxt
	67	{
	68	char *devices;
	69	void *ctxt;
	70	KbdintDevice *device;
477edc5d	71	u_int nreq;
5ba55ada	72	};
5ba55ada	73
396c147e	74	static KbdintAuthctxt *
5ba55ada	75	kbdint_alloc(const char *devs)
	76	{
	77	KbdintAuthctxt *kbdintctxt;
3469eac4	78	Buffer b;
5ba55ada	79	int i;
5ba55ada	80
	81	kbdintctxt = xmalloc(sizeof(KbdintAuthctxt));
	82	if (strcmp(devs, "") == 0) {
3469eac4	83	buffer_init(&b);
5ba55ada	84	for (i = 0; devices[i]; i++) {
3469eac4	85	if (buffer_len(&b) > 0)
	86	buffer_append(&b, ",", 1);
	87	buffer_append(&b, devices[i]->name,
	88	strlen(devices[i]->name));
5ba55ada	89	}
3469eac4	90	buffer_append(&b, "\0", 1);
	91	kbdintctxt->devices = xstrdup(buffer_ptr(&b));
	92	buffer_free(&b);
5ba55ada	93	} else {
	94	kbdintctxt->devices = xstrdup(devs);
	95	}
3469eac4	96	debug("kbdint_alloc: devices '%s'", kbdintctxt->devices);
5ba55ada	97	kbdintctxt->ctxt = NULL;
5ba55ada	98	kbdintctxt->device = NULL;
477edc5d	99	kbdintctxt->nreq = 0;
5ba55ada	100
	101	return kbdintctxt;
	102	}
396c147e	103	static void
5ba55ada	104	kbdint_reset_device(KbdintAuthctxt *kbdintctxt)
	105	{
	106	if (kbdintctxt->ctxt) {
	107	kbdintctxt->device->free_ctx(kbdintctxt->ctxt);
	108	kbdintctxt->ctxt = NULL;
	109	}
	110	kbdintctxt->device = NULL;
	111	}
396c147e	112	static void
5ba55ada	113	kbdint_free(KbdintAuthctxt *kbdintctxt)
	114	{
	115	if (kbdintctxt->device)
	116	kbdint_reset_device(kbdintctxt);
	117	if (kbdintctxt->devices) {
	118	xfree(kbdintctxt->devices);
	119	kbdintctxt->devices = NULL;
	120	}
	121	xfree(kbdintctxt);
	122	}
	123	/* get next device */
396c147e	124	static int
5ba55ada	125	kbdint_next_device(KbdintAuthctxt *kbdintctxt)
	126	{
	127	size_t len;
	128	char *t;
	129	int i;
	130
	131	if (kbdintctxt->device)
	132	kbdint_reset_device(kbdintctxt);
	133	do {
	134	len = kbdintctxt->devices ?
	135	strcspn(kbdintctxt->devices, ",") : 0;
	136
	137	if (len == 0)
	138	break;
	139	for (i = 0; devices[i]; i++)
	140	if (strncmp(kbdintctxt->devices, devices[i]->name, len) == 0)
	141	kbdintctxt->device = devices[i];
	142	t = kbdintctxt->devices;
	143	kbdintctxt->devices = t[len] ? xstrdup(t+len+1) : NULL;
	144	xfree(t);
	145	debug2("kbdint_next_device: devices %s", kbdintctxt->devices ?
	146	kbdintctxt->devices : "<empty>");
	147	} while (kbdintctxt->devices && !kbdintctxt->device);
	148
	149	return kbdintctxt->device ? 1 : 0;
	150	}
59c97189	151
59c97189	152	/*
aa8003d6	153	* try challenge-response, set authctxt->postponed if we have to
59c97189	154	* wait for the response.
	155	*/
	156	int
	157	auth2_challenge(Authctxt authctxt, char devs)
	158	{
5ba55ada	159	debug("auth2_challenge: user=%s devs=%s",
	160	authctxt->user ? authctxt->user : "<nouser>",
	161	devs ? devs : "<no devs>");
	162
f5e69c65	163	if (authctxt->user == NULL \|\| !devs)
5ba55ada	164	return 0;
184eed6a	165	if (authctxt->kbdintctxt == NULL)
5ba55ada	166	authctxt->kbdintctxt = kbdint_alloc(devs);
	167	return auth2_challenge_start(authctxt);
	168	}
	169
2f293d43	170	/* unregister kbd-int callbacks and context */
	171	void
	172	auth2_challenge_stop(Authctxt *authctxt)
	173	{
	174	/* unregister callback */
	175	dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, NULL);
	176	if (authctxt->kbdintctxt != NULL) {
	177	kbdint_free(authctxt->kbdintctxt);
	178	authctxt->kbdintctxt = NULL;
	179	}
	180	}
	181
5ba55ada	182	/* side effect: sets authctxt->postponed if a reply was sent*/
	183	static int
	184	auth2_challenge_start(Authctxt *authctxt)
	185	{
	186	KbdintAuthctxt *kbdintctxt = authctxt->kbdintctxt;
	187
	188	debug2("auth2_challenge_start: devices %s",
	189	kbdintctxt->devices ? kbdintctxt->devices : "<empty>");
	190
	191	if (kbdint_next_device(kbdintctxt) == 0) {
2f293d43	192	auth2_challenge_stop(authctxt);
5ba55ada	193	return 0;
	194	}
	195	debug("auth2_challenge_start: trying authentication method '%s'",
	196	kbdintctxt->device->name);
59c97189	197
5ba55ada	198	if ((kbdintctxt->ctxt = kbdintctxt->device->init_ctx(authctxt)) == NULL) {
2f293d43	199	auth2_challenge_stop(authctxt);
59c97189	200	return 0;
5ba55ada	201	}
5ba55ada	202	if (send_userauth_info_request(authctxt) == 0) {
2f293d43	203	auth2_challenge_stop(authctxt);
59c97189	204	return 0;
5ba55ada	205	}
59c97189	206	dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE,
59c97189	207	&input_userauth_info_response);
5ba55ada	208
59c97189	209	authctxt->postponed = 1;
	210	return 0;
	211	}
	212
5ba55ada	213	static int
5ba55ada	214	send_userauth_info_request(Authctxt *authctxt)
59c97189	215	{
5ba55ada	216	KbdintAuthctxt *kbdintctxt;
	217	char name, instr, **prompts;
	218	int i;
477edc5d	219	u_int *echo_on;
5ba55ada	220
	221	kbdintctxt = authctxt->kbdintctxt;
	222	if (kbdintctxt->device->query(kbdintctxt->ctxt,
477edc5d	223	&name, &instr, &kbdintctxt->nreq, &prompts, &echo_on))
5ba55ada	224	return 0;
59c97189	225
59c97189	226	packet_start(SSH2_MSG_USERAUTH_INFO_REQUEST);
5ba55ada	227	packet_put_cstring(name);
5ba55ada	228	packet_put_cstring(instr);
7203d6bb	229	packet_put_cstring(""); /* language not used */
477edc5d	230	packet_put_int(kbdintctxt->nreq);
477edc5d	231	for (i = 0; i < kbdintctxt->nreq; i++) {
5ba55ada	232	packet_put_cstring(prompts[i]);
	233	packet_put_char(echo_on[i]);
	234	}
59c97189	235	packet_send();
59c97189	236	packet_write_wait();
5ba55ada	237
477edc5d	238	for (i = 0; i < kbdintctxt->nreq; i++)
5ba55ada	239	xfree(prompts[i]);
	240	xfree(prompts);
	241	xfree(echo_on);
	242	xfree(name);
	243	xfree(instr);
	244	return 1;
59c97189	245	}
59c97189	246
5ba55ada	247	static void
7819b5c3	248	input_userauth_info_response(int type, u_int32_t seq, void *ctxt)
59c97189	249	{
59c97189	250	Authctxt *authctxt = ctxt;
5ba55ada	251	KbdintAuthctxt *kbdintctxt;
	252	int i, authenticated = 0, res, len;
	253	u_int nresp;
	254	char *response = NULL, method;
59c97189	255
	256	if (authctxt == NULL)
	257	fatal("input_userauth_info_response: no authctxt");
5ba55ada	258	kbdintctxt = authctxt->kbdintctxt;
	259	if (kbdintctxt == NULL \|\| kbdintctxt->ctxt == NULL)
	260	fatal("input_userauth_info_response: no kbdintctxt");
	261	if (kbdintctxt->device == NULL)
	262	fatal("input_userauth_info_response: no device");
59c97189	263
	264	authctxt->postponed = 0; /* reset */
	265	nresp = packet_get_int();
477edc5d	266	if (nresp != kbdintctxt->nreq)
	267	fatal("input_userauth_info_response: wrong number of replies");
	268	if (nresp > 100)
	269	fatal("input_userauth_info_response: too many replies");
5ba55ada	270	if (nresp > 0) {
343288b8	271	response = xmalloc(nresp * sizeof(char *));
5ba55ada	272	for (i = 0; i < nresp; i++)
	273	response[i] = packet_get_string(NULL);
	274	}
95500969	275	packet_check_eom();
5ba55ada	276
	277	if (authctxt->valid) {
	278	res = kbdintctxt->device->respond(kbdintctxt->ctxt,
	279	nresp, response);
	280	} else {
	281	res = -1;
	282	}
	283
	284	for (i = 0; i < nresp; i++) {
	285	memset(response[i], 'r', strlen(response[i]));
	286	xfree(response[i]);
	287	}
	288	if (response)
59c97189	289	xfree(response);
5ba55ada	290
	291	switch (res) {
	292	case 0:
	293	/* Success! */
	294	authenticated = 1;
	295	break;
	296	case 1:
	297	/* Authentication needs further interaction */
2f293d43	298	if (send_userauth_info_request(authctxt) == 1)
2f293d43	299	authctxt->postponed = 1;
5ba55ada	300	break;
	301	default:
	302	/* Failure! */
	303	break;
59c97189	304	}
5ba55ada	305
	306	len = strlen("keyboard-interactive") + 2 +
	307	strlen(kbdintctxt->device->name);
	308	method = xmalloc(len);
bd2d2ac4	309	snprintf(method, len, "keyboard-interactive/%s",
bd2d2ac4	310	kbdintctxt->device->name);
5ba55ada	311
5ba55ada	312	if (!authctxt->postponed) {
5ba55ada	313	if (authenticated) {
2f293d43	314	auth2_challenge_stop(authctxt);
5ba55ada	315	} else {
	316	/* start next device */
	317	/* may set authctxt->postponed */
	318	auth2_challenge_start(authctxt);
	319	}
	320	}
d9cd3575	321	userauth_finish(authctxt, authenticated, method);
5ba55ada	322	xfree(method);
59c97189	323	}
1853d1ef	324
	325	void
	326	privsep_challenge_enable(void)
	327	{
4881aebb	328	#if defined(BSD_AUTH) \|\| defined(USE_PAM) \|\| defined(SKEY)
	329	int n = 0;
	330	#endif
1853d1ef	331	#ifdef BSD_AUTH
	332	extern KbdintDevice mm_bsdauth_device;
	333	#endif
05114c74	334	#ifdef USE_PAM
	335	extern KbdintDevice mm_sshpam_device;
	336	#endif
1853d1ef	337	#ifdef SKEY
	338	extern KbdintDevice mm_skey_device;
	339	#endif
05114c74	340
1853d1ef	341	#ifdef BSD_AUTH
05114c74	342	devices[n++] = &mm_bsdauth_device;
1853d1ef	343	#else
05114c74	344	#ifdef USE_PAM
	345	devices[n++] = &mm_sshpam_device;
	346	#endif
1853d1ef	347	#ifdef SKEY
05114c74	348	devices[n++] = &mm_skey_device;
1853d1ef	349	#endif
	350	#endif
	351	}