[openssh.git] / auth-krb4.c

/*
 *    Dug Song <dugsong@UMICH.EDU>
 *    Kerberos v4 authentication and ticket-passing routines.
 */

#include "includes.h"
#include "packet.h"
#include "xmalloc.h"
#include "ssh.h"
#include "servconf.h"

RCSID("$OpenBSD: auth-krb4.c,v 1.15 2000/06/22 23:54:59 djm Exp $");

#ifdef KRB4
char *ticket = NULL;

extern ServerOptions options;

/*
 * try krb4 authentication,
 * return 1 on success, 0 on failure, -1 if krb4 is not available
 */

int
auth_krb4_password(struct passwd * pw, const char *password)
{
	AUTH_DAT adata;
	KTEXT_ST tkt;
	struct hostent *hp;
	unsigned long faddr;
	char localhost[MAXHOSTNAMELEN];
	char phost[INST_SZ];
	char realm[REALM_SZ];
	int r;

	/*
	 * Try Kerberos password authentication only for non-root
	 * users and only if Kerberos is installed.
	 */
	if (pw->pw_uid != 0 && krb_get_lrealm(realm, 1) == KSUCCESS) {

		/* Set up our ticket file. */
		if (!krb4_init(pw->pw_uid)) {
			log("Couldn't initialize Kerberos ticket file for %s!",
			    pw->pw_name);
			goto kerberos_auth_failure;
		}
		/* Try to get TGT using our password. */
		r = krb_get_pw_in_tkt((char *) pw->pw_name, "",
		    realm, "krbtgt", realm,
		    DEFAULT_TKT_LIFE, (char *) password);
		if (r != INTK_OK) {
			packet_send_debug("Kerberos V4 password "
			    "authentication for %s failed: %s",
			    pw->pw_name, krb_err_txt[r]);
			goto kerberos_auth_failure;
		}
		/* Successful authentication. */
		chown(tkt_string(), pw->pw_uid, pw->pw_gid);

		/*
		 * Now that we have a TGT, try to get a local
		 * "rcmd" ticket to ensure that we are not talking
		 * to a bogus Kerberos server.
		 */
		(void) gethostname(localhost, sizeof(localhost));
		(void) strlcpy(phost, (char *) krb_get_phost(localhost),
		    INST_SZ);
		r = krb_mk_req(&tkt, KRB4_SERVICE_NAME, phost, realm, 33);

		if (r == KSUCCESS) {
			if (!(hp = gethostbyname(localhost))) {
				log("Couldn't get local host address!");
				goto kerberos_auth_failure;
			}
			memmove((void *) &faddr, (void *) hp->h_addr,
			    sizeof(faddr));

			/* Verify our "rcmd" ticket. */
			r = krb_rd_req(&tkt, KRB4_SERVICE_NAME, phost,
			    faddr, &adata, "");
			if (r == RD_AP_UNDEC) {
				/*
				 * Probably didn't have a srvtab on
				 * localhost. Allow login.
				 */
				log("Kerberos V4 TGT for %s unverifiable, "
				    "no srvtab installed? krb_rd_req: %s",
				    pw->pw_name, krb_err_txt[r]);
			} else if (r != KSUCCESS) {
				log("Kerberos V4 %s ticket unverifiable: %s",
				    KRB4_SERVICE_NAME, krb_err_txt[r]);
				goto kerberos_auth_failure;
			}
		} else if (r == KDC_PR_UNKNOWN) {
			/*
			 * Allow login if no rcmd service exists, but
			 * log the error.
			 */
			log("Kerberos V4 TGT for %s unverifiable: %s; %s.%s "
			    "not registered, or srvtab is wrong?", pw->pw_name,
			krb_err_txt[r], KRB4_SERVICE_NAME, phost);
		} else {
			/*
			 * TGT is bad, forget it. Possibly spoofed!
			 */
			packet_send_debug("WARNING: Kerberos V4 TGT "
			    "possibly spoofed for %s: %s",
			    pw->pw_name, krb_err_txt[r]);
			goto kerberos_auth_failure;
		}

		/* Authentication succeeded. */
		return 1;

kerberos_auth_failure:
		krb4_cleanup_proc(NULL);

		if (!options.kerberos_or_local_passwd)
			return 0;
	} else {
		/* Logging in as root or no local Kerberos realm. */
		packet_send_debug("Unable to authenticate to Kerberos.");
	}
	/* Fall back to ordinary passwd authentication. */
	return -1;
}

void
krb4_cleanup_proc(void *ignore)
{
	debug("krb4_cleanup_proc called");
	if (ticket) {
		(void) dest_tkt();
		xfree(ticket);
		ticket = NULL;
	}
}

int
krb4_init(uid_t uid)
{
	static int cleanup_registered = 0;
	const char *tkt_root = TKT_ROOT;
	struct stat st;
	int fd;

	if (!ticket) {
		/* Set unique ticket string manually since we're still root. */
		ticket = xmalloc(MAXPATHLEN);
#ifdef AFS
		if (lstat("/ticket", &st) != -1)
			tkt_root = "/ticket/";
#endif /* AFS */
		snprintf(ticket, MAXPATHLEN, "%s%d_%d", tkt_root, uid, getpid());
		(void) krb_set_tkt_string(ticket);
	}
	/* Register ticket cleanup in case of fatal error. */
	if (!cleanup_registered) {
		fatal_add_cleanup(krb4_cleanup_proc, NULL);
		cleanup_registered = 1;
	}
	/* Try to create our ticket file. */
	if ((fd = mkstemp(ticket)) != -1) {
		close(fd);
		return 1;
	}
	/* Ticket file exists - make sure user owns it (just passed ticket). */
	if (lstat(ticket, &st) != -1) {
		if (st.st_mode == (S_IFREG | S_IRUSR | S_IWUSR) &&
		    st.st_uid == uid)
			return 1;
	}
	/* Failure - cancel cleanup function, leaving bad ticket for inspection. */
	log("WARNING: bad ticket file %s", ticket);
	fatal_remove_cleanup(krb4_cleanup_proc, NULL);
	cleanup_registered = 0;
	xfree(ticket);
	ticket = NULL;

	return 0;
}

int
auth_krb4(const char *server_user, KTEXT auth, char **client)
{
	AUTH_DAT adat = {0};
	KTEXT_ST reply;
	char instance[INST_SZ];
	int r, s;
	socklen_t slen;
	u_int cksum;
	Key_schedule schedule;
	struct sockaddr_in local, foreign;

	s = packet_get_connection_in();

	slen = sizeof(local);
	memset(&local, 0, sizeof(local));
	if (getsockname(s, (struct sockaddr *) & local, &slen) < 0)
		debug("getsockname failed: %.100s", strerror(errno));
	slen = sizeof(foreign);
	memset(&foreign, 0, sizeof(foreign));
	if (getpeername(s, (struct sockaddr *) & foreign, &slen) < 0) {
		debug("getpeername failed: %.100s", strerror(errno));
		fatal_cleanup();
	}
	instance[0] = '*';
	instance[1] = 0;

	/* Get the encrypted request, challenge, and session key. */
	if ((r = krb_rd_req(auth, KRB4_SERVICE_NAME, instance, 0, &adat, ""))) {
		packet_send_debug("Kerberos V4 krb_rd_req: %.100s", krb_err_txt[r]);
		return 0;
	}
	des_key_sched((des_cblock *) adat.session, schedule);

	*client = xmalloc(MAX_K_NAME_SZ);
	(void) snprintf(*client, MAX_K_NAME_SZ, "%s%s%s@%s", adat.pname,
	    *adat.pinst ? "." : "", adat.pinst, adat.prealm);

	/* Check ~/.klogin authorization now. */
	if (kuserok(&adat, (char *) server_user) != KSUCCESS) {
		packet_send_debug("Kerberos V4 .klogin authorization failed!");
		log("Kerberos V4 .klogin authorization failed for %s to account %s",
		    *client, server_user);
		xfree(*client);
		return 0;
	}
	/* Increment the checksum, and return it encrypted with the
	   session key. */
	cksum = adat.checksum + 1;
	cksum = htonl(cksum);

	/* If we can't successfully encrypt the checksum, we send back an
	   empty message, admitting our failure. */
	if ((r = krb_mk_priv((u_char *) & cksum, reply.dat, sizeof(cksum) + 1,
	    schedule, &adat.session, &local, &foreign)) < 0) {
		packet_send_debug("Kerberos V4 mk_priv: (%d) %s", r, krb_err_txt[r]);
		reply.dat[0] = 0;
		reply.length = 0;
	} else
		reply.length = r;

	/* Clear session key. */
	memset(&adat.session, 0, sizeof(&adat.session));

	packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE);
	packet_put_string((char *) reply.dat, reply.length);
	packet_send();
	packet_write_wait();
	return 1;
}
#endif /* KRB4 */

#ifdef AFS
int
auth_kerberos_tgt(struct passwd *pw, const char *string)
{
	CREDENTIALS creds;

	if (!radix_to_creds(string, &creds)) {
		log("Protocol error decoding Kerberos V4 tgt");
		packet_send_debug("Protocol error decoding Kerberos V4 tgt");
		goto auth_kerberos_tgt_failure;
	}
	if (strncmp(creds.service, "", 1) == 0)	/* backward compatibility */
		strlcpy(creds.service, "krbtgt", sizeof creds.service);

	if (strcmp(creds.service, "krbtgt")) {
		log("Kerberos V4 tgt (%s%s%s@%s) rejected for %s", creds.pname,
		    creds.pinst[0] ? "." : "", creds.pinst, creds.realm,
		    pw->pw_name);
		packet_send_debug("Kerberos V4 tgt (%s%s%s@%s) rejected for %s",
		    creds.pname, creds.pinst[0] ? "." : "", creds.pinst,
		    creds.realm, pw->pw_name);
		goto auth_kerberos_tgt_failure;
	}
	if (!krb4_init(pw->pw_uid))
		goto auth_kerberos_tgt_failure;

	if (in_tkt(creds.pname, creds.pinst) != KSUCCESS)
		goto auth_kerberos_tgt_failure;

	if (save_credentials(creds.service, creds.instance, creds.realm,
	    creds.session, creds.lifetime, creds.kvno,
	    &creds.ticket_st, creds.issue_date) != KSUCCESS) {
		packet_send_debug("Kerberos V4 tgt refused: couldn't save credentials");
		goto auth_kerberos_tgt_failure;
	}
	/* Successful authentication, passed all checks. */
	chown(tkt_string(), pw->pw_uid, pw->pw_gid);

	packet_send_debug("Kerberos V4 tgt accepted (%s.%s@%s, %s%s%s@%s)",
	    creds.service, creds.instance, creds.realm, creds.pname,
	    creds.pinst[0] ? "." : "", creds.pinst, creds.realm);
	memset(&creds, 0, sizeof(creds));
	packet_start(SSH_SMSG_SUCCESS);
	packet_send();
	packet_write_wait();
	return 1;

auth_kerberos_tgt_failure:
	krb4_cleanup_proc(NULL);
	memset(&creds, 0, sizeof(creds));
	packet_start(SSH_SMSG_FAILURE);
	packet_send();
	packet_write_wait();
	return 0;
}

int
auth_afs_token(struct passwd *pw, const char *token_string)
{
	CREDENTIALS creds;
	uid_t uid = pw->pw_uid;

	if (!radix_to_creds(token_string, &creds)) {
		log("Protocol error decoding AFS token");
		packet_send_debug("Protocol error decoding AFS token");
		packet_start(SSH_SMSG_FAILURE);
		packet_send();
		packet_write_wait();
		return 0;
	}
	if (strncmp(creds.service, "", 1) == 0)	/* backward compatibility */
		strlcpy(creds.service, "afs", sizeof creds.service);

	if (strncmp(creds.pname, "AFS ID ", 7) == 0)
		uid = atoi(creds.pname + 7);

	if (kafs_settoken(creds.realm, uid, &creds)) {
		log("AFS token (%s@%s) rejected for %s", creds.pname, creds.realm,
		    pw->pw_name);
		packet_send_debug("AFS token (%s@%s) rejected for %s", creds.pname,
		    creds.realm, pw->pw_name);
		memset(&creds, 0, sizeof(creds));
		packet_start(SSH_SMSG_FAILURE);
		packet_send();
		packet_write_wait();
		return 0;
	}
	packet_send_debug("AFS token accepted (%s@%s, %s@%s)", creds.service,
	    creds.realm, creds.pname, creds.realm);
	memset(&creds, 0, sizeof(creds));
	packet_start(SSH_SMSG_SUCCESS);
	packet_send();
	packet_write_wait();
	return 1;
}
#endif /* AFS */
Commit	Line	Data
8efc0c15	1	/*
5260325f	2	* Dug Song <dugsong@UMICH.EDU>
	3	* Kerberos v4 authentication and ticket-passing routines.
	4	*/
8efc0c15	5
	6	#include "includes.h"
	7	#include "packet.h"
	8	#include "xmalloc.h"
	9	#include "ssh.h"
57112b5a	10	#include "servconf.h"
8efc0c15	11
e5a0294f	12	RCSID("$OpenBSD: auth-krb4.c,v 1.15 2000/06/22 23:54:59 djm Exp $");
e5a0294f	13
8efc0c15	14	#ifdef KRB4
6a17f9c2	15	char *ticket = NULL;
6a17f9c2	16
57112b5a	17	extern ServerOptions options;
	18
	19	/*
	20	* try krb4 authentication,
	21	* return 1 on success, 0 on failure, -1 if krb4 is not available
	22	*/
	23
6ae2364d	24	int
57112b5a	25	auth_krb4_password(struct passwd * pw, const char *password)
	26	{
	27	AUTH_DAT adata;
	28	KTEXT_ST tkt;
	29	struct hostent *hp;
	30	unsigned long faddr;
	31	char localhost[MAXHOSTNAMELEN];
	32	char phost[INST_SZ];
	33	char realm[REALM_SZ];
	34	int r;
	35
	36	/*
	37	* Try Kerberos password authentication only for non-root
	38	* users and only if Kerberos is installed.
	39	*/
	40	if (pw->pw_uid != 0 && krb_get_lrealm(realm, 1) == KSUCCESS) {
	41
	42	/* Set up our ticket file. */
	43	if (!krb4_init(pw->pw_uid)) {
	44	log("Couldn't initialize Kerberos ticket file for %s!",
	45	pw->pw_name);
	46	goto kerberos_auth_failure;
	47	}
	48	/* Try to get TGT using our password. */
	49	r = krb_get_pw_in_tkt((char *) pw->pw_name, "",
	50	realm, "krbtgt", realm,
	51	DEFAULT_TKT_LIFE, (char *) password);
	52	if (r != INTK_OK) {
	53	packet_send_debug("Kerberos V4 password "
	54	"authentication for %s failed: %s",
	55	pw->pw_name, krb_err_txt[r]);
	56	goto kerberos_auth_failure;
	57	}
	58	/* Successful authentication. */
	59	chown(tkt_string(), pw->pw_uid, pw->pw_gid);
	60
	61	/*
	62	* Now that we have a TGT, try to get a local
	63	* "rcmd" ticket to ensure that we are not talking
	64	* to a bogus Kerberos server.
	65	*/
	66	(void) gethostname(localhost, sizeof(localhost));
	67	(void) strlcpy(phost, (char *) krb_get_phost(localhost),
	68	INST_SZ);
	69	r = krb_mk_req(&tkt, KRB4_SERVICE_NAME, phost, realm, 33);
	70
	71	if (r == KSUCCESS) {
	72	if (!(hp = gethostbyname(localhost))) {
	73	log("Couldn't get local host address!");
	74	goto kerberos_auth_failure;
	75	}
	76	memmove((void ) &faddr, (void ) hp->h_addr,
	77	sizeof(faddr));
	78
	79	/* Verify our "rcmd" ticket. */
	80	r = krb_rd_req(&tkt, KRB4_SERVICE_NAME, phost,
	81	faddr, &adata, "");
	82	if (r == RD_AP_UNDEC) {
	83	/*
	84	* Probably didn't have a srvtab on
	85	* localhost. Allow login.
	86	*/
	87	log("Kerberos V4 TGT for %s unverifiable, "
	88	"no srvtab installed? krb_rd_req: %s",
89	pw->pw_name, krb_err_txt[r]);
90	} else if (r != KSUCCESS) {
91	log("Kerberos V4 %s ticket unverifiable: %s",
92	KRB4_SERVICE_NAME, krb_err_txt[r]);
93	goto kerberos_auth_failure;
94	}
95	} else if (r == KDC_PR_UNKNOWN) {
96	/*
97	* Allow login if no rcmd service exists, but
98	* log the error.
99	*/
100	log("Kerberos V4 TGT for %s unverifiable: %s; %s.%s "
101	"not registered, or srvtab is wrong?", pw->pw_name,
102	krb_err_txt[r], KRB4_SERVICE_NAME, phost);
103	} else {
104	/*
105	* TGT is bad, forget it. Possibly spoofed!
106	*/
107	packet_send_debug("WARNING: Kerberos V4 TGT "
108	"possibly spoofed for %s: %s",
109	pw->pw_name, krb_err_txt[r]);
110	goto kerberos_auth_failure;
111	}
112
113	/* Authentication succeeded. */
114	return 1;
115
116	kerberos_auth_failure:
117	krb4_cleanup_proc(NULL);
118
119	if (!options.kerberos_or_local_passwd)
120	return 0;
121	} else {
122	/* Logging in as root or no local Kerberos realm. */
123	packet_send_debug("Unable to authenticate to Kerberos.");
124	}
125	/* Fall back to ordinary passwd authentication. */
126	return -1;
127	}
128
6a17f9c2	129	void
	130	krb4_cleanup_proc(void *ignore)
	131	{
5260325f	132	debug("krb4_cleanup_proc called");
	133	if (ticket) {
	134	(void) dest_tkt();
	135	xfree(ticket);
	136	ticket = NULL;
	137	}
6a17f9c2	138	}
6a17f9c2	139
6ae2364d	140	int
5260325f	141	krb4_init(uid_t uid)
8efc0c15	142	{
5260325f	143	static int cleanup_registered = 0;
4fe2af09	144	const char *tkt_root = TKT_ROOT;
5260325f	145	struct stat st;
	146	int fd;
	147
	148	if (!ticket) {
	149	/* Set unique ticket string manually since we're still root. */
	150	ticket = xmalloc(MAXPATHLEN);
8efc0c15	151	#ifdef AFS
5260325f	152	if (lstat("/ticket", &st) != -1)
5260325f	153	tkt_root = "/ticket/";
8efc0c15	154	#endif /* AFS */
5260325f	155	snprintf(ticket, MAXPATHLEN, "%s%d_%d", tkt_root, uid, getpid());
	156	(void) krb_set_tkt_string(ticket);
	157	}
	158	/* Register ticket cleanup in case of fatal error. */
	159	if (!cleanup_registered) {
	160	fatal_add_cleanup(krb4_cleanup_proc, NULL);
	161	cleanup_registered = 1;
	162	}
	163	/* Try to create our ticket file. */
	164	if ((fd = mkstemp(ticket)) != -1) {
	165	close(fd);
	166	return 1;
	167	}
	168	/* Ticket file exists - make sure user owns it (just passed ticket). */
	169	if (lstat(ticket, &st) != -1) {
	170	if (st.st_mode == (S_IFREG \| S_IRUSR \| S_IWUSR) &&
	171	st.st_uid == uid)
	172	return 1;
	173	}
	174	/* Failure - cancel cleanup function, leaving bad ticket for inspection. */
	175	log("WARNING: bad ticket file %s", ticket);
	176	fatal_remove_cleanup(krb4_cleanup_proc, NULL);
	177	cleanup_registered = 0;
	178	xfree(ticket);
	179	ticket = NULL;
	180
	181	return 0;
8efc0c15	182	}
8efc0c15	183
6ae2364d	184	int
5260325f	185	auth_krb4(const char server_user, KTEXT auth, char *client)
8efc0c15	186	{
5260325f	187	AUTH_DAT adat = {0};
	188	KTEXT_ST reply;
	189	char instance[INST_SZ];
	190	int r, s;
610cd5c6	191	socklen_t slen;
5260325f	192	u_int cksum;
	193	Key_schedule schedule;
	194	struct sockaddr_in local, foreign;
	195
	196	s = packet_get_connection_in();
	197
610cd5c6	198	slen = sizeof(local);
5260325f	199	memset(&local, 0, sizeof(local));
610cd5c6	200	if (getsockname(s, (struct sockaddr *) & local, &slen) < 0)
5260325f	201	debug("getsockname failed: %.100s", strerror(errno));
610cd5c6	202	slen = sizeof(foreign);
5260325f	203	memset(&foreign, 0, sizeof(foreign));
610cd5c6	204	if (getpeername(s, (struct sockaddr *) & foreign, &slen) < 0) {
5260325f	205	debug("getpeername failed: %.100s", strerror(errno));
	206	fatal_cleanup();
	207	}
	208	instance[0] = '*';
	209	instance[1] = 0;
	210
	211	/* Get the encrypted request, challenge, and session key. */
	212	if ((r = krb_rd_req(auth, KRB4_SERVICE_NAME, instance, 0, &adat, ""))) {
	213	packet_send_debug("Kerberos V4 krb_rd_req: %.100s", krb_err_txt[r]);
	214	return 0;
	215	}
	216	des_key_sched((des_cblock *) adat.session, schedule);
	217
	218	*client = xmalloc(MAX_K_NAME_SZ);
	219	(void) snprintf(*client, MAX_K_NAME_SZ, "%s%s%s@%s", adat.pname,
	220	*adat.pinst ? "." : "", adat.pinst, adat.prealm);
	221
	222	/* Check ~/.klogin authorization now. */
	223	if (kuserok(&adat, (char *) server_user) != KSUCCESS) {
	224	packet_send_debug("Kerberos V4 .klogin authorization failed!");
	225	log("Kerberos V4 .klogin authorization failed for %s to account %s",
	226	*client, server_user);
	227	xfree(*client);
	228	return 0;
	229	}
	230	/* Increment the checksum, and return it encrypted with the
	231	session key. */
	232	cksum = adat.checksum + 1;
	233	cksum = htonl(cksum);
	234
	235	/* If we can't successfully encrypt the checksum, we send back an
	236	empty message, admitting our failure. */
	237	if ((r = krb_mk_priv((u_char *) & cksum, reply.dat, sizeof(cksum) + 1,
	238	schedule, &adat.session, &local, &foreign)) < 0) {
	239	packet_send_debug("Kerberos V4 mk_priv: (%d) %s", r, krb_err_txt[r]);
	240	reply.dat[0] = 0;
	241	reply.length = 0;
	242	} else
	243	reply.length = r;
	244
	245	/* Clear session key. */
	246	memset(&adat.session, 0, sizeof(&adat.session));
	247
	248	packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE);
	249	packet_put_string((char *) reply.dat, reply.length);
	250	packet_send();
	251	packet_write_wait();
	252	return 1;
8efc0c15	253	}
	254	#endif /* KRB4 */
	255
	256	#ifdef AFS
6ae2364d	257	int
5260325f	258	auth_kerberos_tgt(struct passwd pw, const char string)
8efc0c15	259	{
5260325f	260	CREDENTIALS creds;
	261
	262	if (!radix_to_creds(string, &creds)) {
	263	log("Protocol error decoding Kerberos V4 tgt");
	264	packet_send_debug("Protocol error decoding Kerberos V4 tgt");
	265	goto auth_kerberos_tgt_failure;
	266	}
	267	if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */
	268	strlcpy(creds.service, "krbtgt", sizeof creds.service);
	269
	270	if (strcmp(creds.service, "krbtgt")) {
	271	log("Kerberos V4 tgt (%s%s%s@%s) rejected for %s", creds.pname,
	272	creds.pinst[0] ? "." : "", creds.pinst, creds.realm,
	273	pw->pw_name);
	274	packet_send_debug("Kerberos V4 tgt (%s%s%s@%s) rejected for %s",
	275	creds.pname, creds.pinst[0] ? "." : "", creds.pinst,
	276	creds.realm, pw->pw_name);
	277	goto auth_kerberos_tgt_failure;
	278	}
	279	if (!krb4_init(pw->pw_uid))
	280	goto auth_kerberos_tgt_failure;
	281
	282	if (in_tkt(creds.pname, creds.pinst) != KSUCCESS)
	283	goto auth_kerberos_tgt_failure;
	284
	285	if (save_credentials(creds.service, creds.instance, creds.realm,
	286	creds.session, creds.lifetime, creds.kvno,
	287	&creds.ticket_st, creds.issue_date) != KSUCCESS) {
	288	packet_send_debug("Kerberos V4 tgt refused: couldn't save credentials");
	289	goto auth_kerberos_tgt_failure;
	290	}
	291	/* Successful authentication, passed all checks. */
	292	chown(tkt_string(), pw->pw_uid, pw->pw_gid);
	293
	294	packet_send_debug("Kerberos V4 tgt accepted (%s.%s@%s, %s%s%s@%s)",
	295	creds.service, creds.instance, creds.realm, creds.pname,
	296	creds.pinst[0] ? "." : "", creds.pinst, creds.realm);
	297	memset(&creds, 0, sizeof(creds));
	298	packet_start(SSH_SMSG_SUCCESS);
	299	packet_send();
	300	packet_write_wait();
	301	return 1;
	302
	303	auth_kerberos_tgt_failure:
	304	krb4_cleanup_proc(NULL);
	305	memset(&creds, 0, sizeof(creds));
	306	packet_start(SSH_SMSG_FAILURE);
	307	packet_send();
	308	packet_write_wait();
	309	return 0;
8efc0c15	310	}
8efc0c15	311
6ae2364d	312	int
5260325f	313	auth_afs_token(struct passwd pw, const char token_string)
8efc0c15	314	{
5260325f	315	CREDENTIALS creds;
	316	uid_t uid = pw->pw_uid;
	317
	318	if (!radix_to_creds(token_string, &creds)) {
	319	log("Protocol error decoding AFS token");
	320	packet_send_debug("Protocol error decoding AFS token");
	321	packet_start(SSH_SMSG_FAILURE);
	322	packet_send();
	323	packet_write_wait();
	324	return 0;
	325	}
	326	if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */
	327	strlcpy(creds.service, "afs", sizeof creds.service);
	328
	329	if (strncmp(creds.pname, "AFS ID ", 7) == 0)
	330	uid = atoi(creds.pname + 7);
	331
	332	if (kafs_settoken(creds.realm, uid, &creds)) {
	333	log("AFS token (%s@%s) rejected for %s", creds.pname, creds.realm,
	334	pw->pw_name);
	335	packet_send_debug("AFS token (%s@%s) rejected for %s", creds.pname,
	336	creds.realm, pw->pw_name);
	337	memset(&creds, 0, sizeof(creds));
	338	packet_start(SSH_SMSG_FAILURE);
	339	packet_send();
	340	packet_write_wait();
	341	return 0;
	342	}
	343	packet_send_debug("AFS token accepted (%s@%s, %s@%s)", creds.service,
	344	creds.realm, creds.pname, creds.realm);
	345	memset(&creds, 0, sizeof(creds));
	346	packet_start(SSH_SMSG_SUCCESS);
	347	packet_send();
	348	packet_write_wait();
	349	return 1;
8efc0c15	350	}
8efc0c15	351	#endif /* AFS */