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source: trunk-3.0/source/libsmb/clikrb5.c@ 101

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Last change on this file since 101 was 44, checked in by Paul Smedley, 18 years ago
Update source to 3.0.25b
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1	/*
2	Unix SMB/CIFS implementation.
3	simple kerberos5 routines for active directory
4	Copyright (C) Andrew Tridgell 2001
5	Copyright (C) Luke Howard 2002-2003
6	Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
7	Copyright (C) Guenther Deschner 2005
8
9	This program is free software; you can redistribute it and/or modify
10	it under the terms of the GNU General Public License as published by
11	the Free Software Foundation; either version 2 of the License, or
12	(at your option) any later version.
13
14	This program is distributed in the hope that it will be useful,
15	but WITHOUT ANY WARRANTY; without even the implied warranty of
16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	GNU General Public License for more details.
18
19	You should have received a copy of the GNU General Public License
20	along with this program; if not, write to the Free Software
21	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22	*/
23
24	#define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
25	#define KRB5_DEPRECATED 1 /* this file uses DEPRECATED interfaces! */
26
27	#include "includes.h"
28
29	#ifdef HAVE_KRB5
30
31	#ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE
32	#define KRB5_KEY_TYPE(k) ((k)->keytype)
33	#define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
34	#define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
35	#else
36	#define KRB5_KEY_TYPE(k) ((k)->enctype)
37	#define KRB5_KEY_LENGTH(k) ((k)->length)
38	#define KRB5_KEY_DATA(k) ((k)->contents)
39	#endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
40
41	/**************************************************************
42	Wrappers around kerberos string functions that convert from
43	utf8 -> unix charset and vica versa.
44	**************************************************************/
45
46	/**************************************************************
47	krb5_parse_name that takes a UNIX charset.
48	**************************************************************/
49
50	krb5_error_code smb_krb5_parse_name(krb5_context context,
51	const char name, / in unix charset */
52	krb5_principal *principal)
53	{
54	krb5_error_code ret;
55	char *utf8_name;
56
57	if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
58	return ENOMEM;
59	}
60
61	ret = krb5_parse_name(context, utf8_name, principal);
62	SAFE_FREE(utf8_name);
63	return ret;
64	}
65
66	#ifdef HAVE_KRB5_PARSE_NAME_NOREALM
67	/**************************************************************
68	krb5_parse_name_norealm that takes a UNIX charset.
69	**************************************************************/
70
71	static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
72	const char name, / in unix charset */
73	krb5_principal *principal)
74	{
75	krb5_error_code ret;
76	char *utf8_name;
77
78	*principal = NULL;
79	if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
80	return ENOMEM;
81	}
82
83	ret = krb5_parse_name_norealm(context, utf8_name, principal);
84	SAFE_FREE(utf8_name);
85	return ret;
86	}
87	#endif
88
89	/**************************************************************
90	krb5_parse_name that returns a UNIX charset name. Must
91	be freed with normal free() call.
92	**************************************************************/
93
94	krb5_error_code smb_krb5_unparse_name(krb5_context context,
95	krb5_const_principal principal,
96	char **unix_name)
97	{
98	krb5_error_code ret;
99	char *utf8_name;
100
101	*unix_name = NULL;
102	ret = krb5_unparse_name(context, principal, &utf8_name);
103	if (ret) {
104	return ret;
105	}
106
107	if (pull_utf8_allocate(unix_name, utf8_name)==-1) {
108	krb5_free_unparsed_name(context, utf8_name);
109	return ENOMEM;
110	}
111	krb5_free_unparsed_name(context, utf8_name);
112	return 0;
113	}
114
115	#ifndef HAVE_KRB5_SET_REAL_TIME
116	/*
117	* This function is not in the Heimdal mainline.
118	*/
119	krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
120	{
121	krb5_error_code ret;
122	int32_t sec, usec;
123
124	ret = krb5_us_timeofday(context, &sec, &usec);
125	if (ret)
126	return ret;
127
128	context->kdc_sec_offset = seconds - sec;
129	context->kdc_usec_offset = microseconds - usec;
130
131	return 0;
132	}
133	#endif
134
135	#if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
136
137	#if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
138
139	/* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
140	* to krb5_set_default_tgs_ktypes. See
141	* http://lists.samba.org/archive/samba-technical/2006-July/048271.html
142	*
143	* If the MIT libraries are not exporting internal symbols, we will end up in
144	* this branch, which is correct. Otherwise we will continue to use the
145	* internal symbol
146	*/
147	krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
148	{
149	return krb5_set_default_tgs_enctypes(ctx, enc);
150	}
151
152	#elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
153
154	/* Heimdal */
155	krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
156	{
157	return krb5_set_default_in_tkt_etypes(ctx, enc);
158	}
159
160	#endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
161
162	#endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
163
164	#if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
165	/* HEIMDAL */
166	void setup_kaddr( krb5_address pkaddr, struct sockaddr paddr)
167	{
168	pkaddr->addr_type = KRB5_ADDRESS_INET;
169	pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
170	pkaddr->address.data = (char )&(((struct sockaddr_in )paddr)->sin_addr);
171	}
172	#elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
173	/* MIT */
174	void setup_kaddr( krb5_address pkaddr, struct sockaddr paddr)
175	{
176	pkaddr->addrtype = ADDRTYPE_INET;
177	pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
178	pkaddr->contents = (krb5_octet )&(((struct sockaddr_in )paddr)->sin_addr);
179	}
180	#else
181	#error UNKNOWN_ADDRTYPE
182	#endif
183
184	#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
185	int create_kerberos_key_from_string_direct(krb5_context context,
186	krb5_principal host_princ,
187	krb5_data *password,
188	krb5_keyblock *key,
189	krb5_enctype enctype)
190	{
191	int ret;
192	krb5_data salt;
193	krb5_encrypt_block eblock;
194
195	ret = krb5_principal2salt(context, host_princ, &salt);
196	if (ret) {
197	DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
198	return ret;
199	}
200	krb5_use_enctype(context, &eblock, enctype);
201	ret = krb5_string_to_key(context, &eblock, key, password, &salt);
202	SAFE_FREE(salt.data);
203	return ret;
204	}
205	#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
206	int create_kerberos_key_from_string_direct(krb5_context context,
207	krb5_principal host_princ,
208	krb5_data *password,
209	krb5_keyblock *key,
210	krb5_enctype enctype)
211	{
212	int ret;
213	krb5_salt salt;
214
215	ret = krb5_get_pw_salt(context, host_princ, &salt);
216	if (ret) {
217	DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
218	return ret;
219	}
220
221	ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
222	krb5_free_salt(context, salt);
223	return ret;
224	}
225	#else
226	#error UNKNOWN_CREATE_KEY_FUNCTIONS
227	#endif
228
229	int create_kerberos_key_from_string(krb5_context context,
230	krb5_principal host_princ,
231	krb5_data *password,
232	krb5_keyblock *key,
233	krb5_enctype enctype)
234	{
235	krb5_principal salt_princ = NULL;
236	int ret;
237	/*
238	* Check if we've determined that the KDC is salting keys for this
239	* principal/enctype in a non-obvious way. If it is, try to match
240	* its behavior.
241	*/
242	salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
243	ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
244	if (salt_princ) {
245	krb5_free_principal(context, salt_princ);
246	}
247	return ret;
248	}
249
250	#if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
251	krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
252	krb5_enctype **enctypes)
253	{
254	return krb5_get_permitted_enctypes(context, enctypes);
255	}
256	#elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
257	krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
258	krb5_enctype **enctypes)
259	{
260	return krb5_get_default_in_tkt_etypes(context, enctypes);
261	}
262	#else
263	#error UNKNOWN_GET_ENCTYPES_FUNCTIONS
264	#endif
265
266	#if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
267	krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
268	krb5_auth_context auth_context,
269	krb5_keyblock *keyblock)
270	{
271	return krb5_auth_con_setkey(context, auth_context, keyblock);
272	}
273	#endif
274
275	BOOL unwrap_pac(TALLOC_CTX mem_ctx, DATA_BLOB auth_data, DATA_BLOB *unwrapped_pac_data)
276	{
277	DATA_BLOB pac_contents;
278	ASN1_DATA data;
279	int data_type;
280
281	if (!auth_data->length) {
282	return False;
283	}
284
285	asn1_load(&data, *auth_data);
286	asn1_start_tag(&data, ASN1_SEQUENCE(0));
287	asn1_start_tag(&data, ASN1_SEQUENCE(0));
288	asn1_start_tag(&data, ASN1_CONTEXT(0));
289	asn1_read_Integer(&data, &data_type);
290
291	if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
292	DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
293	asn1_free(&data);
294	return False;
295	}
296
297	asn1_end_tag(&data);
298	asn1_start_tag(&data, ASN1_CONTEXT(1));
299	asn1_read_OctetString(&data, &pac_contents);
300	asn1_end_tag(&data);
301	asn1_end_tag(&data);
302	asn1_end_tag(&data);
303	asn1_free(&data);
304
305	*unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
306
307	data_blob_free(&pac_contents);
308
309	return True;
310	}
311
312	BOOL get_auth_data_from_tkt(TALLOC_CTX mem_ctx, DATA_BLOB auth_data, krb5_ticket *tkt)
313	{
314	DATA_BLOB auth_data_wrapped;
315	BOOL got_auth_data_pac = False;
316	int i;
317
318	#if defined(HAVE_KRB5_TKT_ENC_PART2)
319	if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
320	tkt->enc_part2->authorization_data[0] &&
321	tkt->enc_part2->authorization_data[0]->length)
322	{
323	for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
324
325	if (tkt->enc_part2->authorization_data[i]->ad_type !=
326	KRB5_AUTHDATA_IF_RELEVANT) {
327	DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
328	tkt->enc_part2->authorization_data[i]->ad_type));
329	continue;
330	}
331
332	auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
333	tkt->enc_part2->authorization_data[i]->length);
334
335	/* check if it is a PAC */
336	got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
337	data_blob_free(&auth_data_wrapped);
338
339	if (!got_auth_data_pac) {
340	continue;
341	}
342	}
343
344	return got_auth_data_pac;
345	}
346
347	#else
348	if (tkt->ticket.authorization_data &&
349	tkt->ticket.authorization_data->len)
350	{
351	for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
352
353	if (tkt->ticket.authorization_data->val[i].ad_type !=
354	KRB5_AUTHDATA_IF_RELEVANT) {
355	DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
356	tkt->ticket.authorization_data->val[i].ad_type));
357	continue;
358	}
359
360	auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
361	tkt->ticket.authorization_data->val[i].ad_data.length);
362
363	/* check if it is a PAC */
364	got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
365	data_blob_free(&auth_data_wrapped);
366
367	if (!got_auth_data_pac) {
368	continue;
369	}
370	}
371
372	return got_auth_data_pac;
373	}
374	#endif
375	return False;
376	}
377
378	krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
379	{
380	#if defined(HAVE_KRB5_TKT_ENC_PART2)
381	return tkt->enc_part2->client;
382	#else
383	return tkt->client;
384	#endif
385	}
386
387	#if !defined(HAVE_KRB5_LOCATE_KDC)
388
389	/* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
390	* to a public interface for this functionality, so we have to be able to live
391	* without it if the MIT libraries are hiding their internal symbols.
392	*/
393
394	#if defined(KRB5_KRBHST_INIT)
395	/* Heimdal */
396	krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data realm, struct sockaddr addr_pp, int naddrs, int get_masters)
397	{
398	krb5_krbhst_handle hnd;
399	krb5_krbhst_info *hinfo;
400	krb5_error_code rc;
401	int num_kdcs, i;
402	struct sockaddr *sa;
403	struct addrinfo *ai;
404
405	*addr_pp = NULL;
406	*naddrs = 0;
407
408	rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
409	if (rc) {
410	DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
411	return rc;
412	}
413
414	for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
415	;
416
417	krb5_krbhst_reset(ctx, hnd);
418
419	if (!num_kdcs) {
420	DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
421	krb5_krbhst_free(ctx, hnd);
422	return -1;
423	}
424
425	sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
426	if (!sa) {
427	DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
428	krb5_krbhst_free(ctx, hnd);
429	naddrs = 0;
430	return -1;
431	}
432
433	memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
434
435	for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
436
437	#if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
438	rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
439	if (rc) {
440	DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
441	continue;
442	}
443	#endif
444	if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
445	memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
446	}
447
448	krb5_krbhst_free(ctx, hnd);
449
450	*naddrs = num_kdcs;
451	*addr_pp = sa;
452	return 0;
453	}
454
455	#else /* ! defined(KRB5_KRBHST_INIT) */
456
457	krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
458	struct sockaddr *addr_pp, int naddrs, int get_masters)
459	{
460	DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
461	return KRB5_KDC_UNREACH;
462	}
463
464	#endif /* KRB5_KRBHST_INIT */
465
466	#else /* ! HAVE_KRB5_LOCATE_KDC */
467
468	krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
469	struct sockaddr *addr_pp, int naddrs, int get_masters)
470	{
471	return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
472	}
473
474	#endif /* HAVE_KRB5_LOCATE_KDC */
475
476	#if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
477	void krb5_free_unparsed_name(krb5_context context, char *val)
478	{
479	SAFE_FREE(val);
480	}
481	#endif
482
483	void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
484	{
485	#if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
486	if (pdata->data) {
487	krb5_free_data_contents(context, pdata);
488	}
489	#else
490	SAFE_FREE(pdata->data);
491	#endif
492	}
493
494	void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
495	{
496	#if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
497	KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
498	#elif defined(HAVE_KRB5_SESSION_IN_CREDS)
499	KRB5_KEY_TYPE((&pcreds->session)) = enctype;
500	#else
501	#error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
502	#endif
503	}
504
505	BOOL kerberos_compatible_enctypes(krb5_context context,
506	krb5_enctype enctype1,
507	krb5_enctype enctype2)
508	{
509	#if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
510	krb5_boolean similar = 0;
511
512	krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
513	return similar ? True : False;
514	#elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
515	return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
516	#endif
517	}
518
519	static BOOL ads_cleanup_expired_creds(krb5_context context,
520	krb5_ccache ccache,
521	krb5_creds *credsp)
522	{
523	krb5_error_code retval;
524	const char *cc_type = krb5_cc_get_type(context, ccache);
525
526	DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
527	cc_type, krb5_cc_get_name(context, ccache),
528	http_timestring(credsp->times.endtime)));
529
530	/* we will probably need new tickets if the current ones
531	will expire within 10 seconds.
532	*/
533	if (credsp->times.endtime >= (time(NULL) + 10))
534	return False;
535
536	/* heimdal won't remove creds from a file ccache, and
537	perhaps we shouldn't anyway, since internally we
538	use memory ccaches, and a FILE one probably means that
539	we're using creds obtained outside of our exectuable
540	*/
541	if (strequal(cc_type, "FILE")) {
542	DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
543	return False;
544	}
545
546	retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
547	if (retval) {
548	DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
549	error_message(retval)));
550	/* If we have an error in this, we want to display it,
551	but continue as though we deleted it */
552	}
553	return True;
554	}
555
556	/*
557	we can't use krb5_mk_req because w2k wants the service to be in a particular format
558	*/
559	static krb5_error_code ads_krb5_mk_req(krb5_context context,
560	krb5_auth_context *auth_context,
561	const krb5_flags ap_req_options,
562	const char *principal,
563	krb5_ccache ccache,
564	krb5_data *outbuf,
565	time_t *expire_time)
566	{
567	krb5_error_code retval;
568	krb5_principal server;
569	krb5_creds * credsp;
570	krb5_creds creds;
571	krb5_data in_data;
572	BOOL creds_ready = False;
573	int i = 0, maxtries = 3;
574
575	retval = smb_krb5_parse_name(context, principal, &server);
576	if (retval) {
577	DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
578	return retval;
579	}
580
581	/* obtain ticket & session key */
582	ZERO_STRUCT(creds);
583	if ((retval = krb5_copy_principal(context, server, &creds.server))) {
584	DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
585	error_message(retval)));
586	goto cleanup_princ;
587	}
588
589	if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
590	/* This can commonly fail on smbd startup with no ticket in the cache.
591	* Report at higher level than 1. */
592	DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
593	error_message(retval)));
594	goto cleanup_creds;
595	}
596
597	while (!creds_ready && (i < maxtries)) {
598
599	if ((retval = krb5_get_credentials(context, 0, ccache,
600	&creds, &credsp))) {
601	DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
602	principal, error_message(retval)));
603	goto cleanup_creds;
604	}
605
606	/* cope with ticket being in the future due to clock skew */
607	if ((unsigned)credsp->times.starttime > time(NULL)) {
608	time_t t = time(NULL);
609	int time_offset =(int)((unsigned)credsp->times.starttime-t);
610	DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
611	krb5_set_real_time(context, t + time_offset + 1, 0);
612	}
613
614	if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
615	creds_ready = True;
616	}
617
618	i++;
619	}
620
621	DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
622	principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
623	http_timestring((unsigned)credsp->times.endtime),
624	(unsigned)credsp->times.endtime));
625
626	if (expire_time) {
627	*expire_time = (time_t)credsp->times.endtime;
628	}
629
630	in_data.length = 0;
631	retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
632	&in_data, credsp, outbuf);
633	if (retval) {
634	DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
635	error_message(retval)));
636	}
637
638	krb5_free_creds(context, credsp);
639
640	cleanup_creds:
641	krb5_free_cred_contents(context, &creds);
642
643	cleanup_princ:
644	krb5_free_principal(context, server);
645
646	return retval;
647	}
648
649	/*
650	get a kerberos5 ticket for the given service
651	*/
652	int cli_krb5_get_ticket(const char *principal, time_t time_offset,
653	DATA_BLOB ticket, DATA_BLOB session_key_krb5,
654	uint32 extra_ap_opts, const char *ccname,
655	time_t *tgs_expire)
656
657	{
658	krb5_error_code retval;
659	krb5_data packet;
660	krb5_context context = NULL;
661	krb5_ccache ccdef = NULL;
662	krb5_auth_context auth_context = NULL;
663	krb5_enctype enc_types[] = {
664	#ifdef ENCTYPE_ARCFOUR_HMAC
665	ENCTYPE_ARCFOUR_HMAC,
666	#endif
667	ENCTYPE_DES_CBC_MD5,
668	ENCTYPE_DES_CBC_CRC,
669	ENCTYPE_NULL};
670
671	initialize_krb5_error_table();
672	retval = krb5_init_context(&context);
673	if (retval) {
674	DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
675	error_message(retval)));
676	goto failed;
677	}
678
679	if (time_offset != 0) {
680	krb5_set_real_time(context, time(NULL) + time_offset, 0);
681	}
682
683	if ((retval = krb5_cc_resolve(context, ccname ?
684	ccname : krb5_cc_default_name(context), &ccdef))) {
685	DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
686	error_message(retval)));
687	goto failed;
688	}
689
690	if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
691	DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
692	error_message(retval)));
693	goto failed;
694	}
695
696	if ((retval = ads_krb5_mk_req(context,
697	&auth_context,
698	AP_OPTS_USE_SUBKEY \| (krb5_flags)extra_ap_opts,
699	principal,
700	ccdef, &packet,
701	tgs_expire))) {
702	goto failed;
703	}
704
705	get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
706
707	*ticket = data_blob(packet.data, packet.length);
708
709	kerberos_free_data_contents(context, &packet);
710
711	failed:
712
713	if ( context ) {
714	if (ccdef)
715	krb5_cc_close(context, ccdef);
716	if (auth_context)
717	krb5_auth_con_free(context, auth_context);
718	krb5_free_context(context);
719	}
720
721	return retval;
722	}
723
724	BOOL get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
725	{
726	krb5_keyblock *skey;
727	krb5_error_code err;
728	BOOL ret = False;
729
730	if (remote)
731	err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
732	else
733	err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
734	if (err == 0 && skey != NULL) {
735	DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
736	*session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
737	dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
738
739	ret = True;
740
741	krb5_free_keyblock(context, skey);
742	} else {
743	DEBUG(10, ("KRB5 error getting session key %d\n", err));
744	}
745
746	return ret;
747	}
748
749
750	#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
751	const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
752
753	const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
754	{
755	static krb5_data kdata;
756
757	kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
758	kdata.length = strlen((const char *)kdata.data);
759	return &kdata;
760	}
761	#endif
762
763	krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
764	{
765	#if defined(HAVE_KRB5_KT_FREE_ENTRY)
766	return krb5_kt_free_entry(context, kt_entry);
767	#elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
768	return krb5_free_keytab_entry_contents(context, kt_entry);
769	#else
770	#error UNKNOWN_KT_FREE_FUNCTION
771	#endif
772	}
773
774	void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
775	PAC_SIGNATURE_DATA *sig)
776	{
777	#ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
778	cksum->cksumtype = (krb5_cksumtype)sig->type;
779	cksum->checksum.length = sig->signature.buf_len;
780	cksum->checksum.data = sig->signature.buffer;
781	#else
782	cksum->checksum_type = (krb5_cksumtype)sig->type;
783	cksum->length = sig->signature.buf_len;
784	cksum->contents = sig->signature.buffer;
785	#endif
786	}
787
788	krb5_error_code smb_krb5_verify_checksum(krb5_context context,
789	krb5_keyblock *keyblock,
790	krb5_keyusage usage,
791	krb5_checksum *cksum,
792	uint8 *data,
793	size_t length)
794	{
795	krb5_error_code ret;
796
797	/* verify the checksum */
798
799	/* welcome to the wonderful world of samba's kerberos abstraction layer:
800	*
801	* function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
802	* -----------------------------------------------------------------------------
803	* krb5_c_verify_checksum - works works
804	* krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
805	*/
806
807	#if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
808	{
809	krb5_boolean checksum_valid = False;
810	krb5_data input;
811
812	input.data = (char *)data;
813	input.length = length;
814
815	ret = krb5_c_verify_checksum(context,
816	keyblock,
817	usage,
818	&input,
819	cksum,
820	&checksum_valid);
821	if (ret) {
822	DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
823	error_message(ret)));
824	return ret;
825	}
826
827	if (!checksum_valid)
828	ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
829	}
830
831	#elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
832
833	/* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
834	* without enctype and it ignores any key_usage types - Guenther */
835
836	{
837
838	krb5_crypto crypto;
839	ret = krb5_crypto_init(context,
840	keyblock,
841	0,
842	&crypto);
843	if (ret) {
844	DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
845	error_message(ret)));
846	return ret;
847	}
848
849	ret = krb5_verify_checksum(context,
850	crypto,
851	usage,
852	data,
853	length,
854	cksum);
855
856	krb5_crypto_destroy(context, crypto);
857	}
858
859	#else
860	#error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
861	#endif
862
863	return ret;
864	}
865
866	time_t get_authtime_from_tkt(krb5_ticket *tkt)
867	{
868	#if defined(HAVE_KRB5_TKT_ENC_PART2)
869	return tkt->enc_part2->times.authtime;
870	#else
871	return tkt->ticket.authtime;
872	#endif
873	}
874
875	#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
876	static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
877	{
878	#ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
879	if (ap_req->ticket->enc_part.kvno)
880	return ap_req->ticket->enc_part.kvno;
881	#else /* Heimdal */
882	if (ap_req->ticket.enc_part.kvno)
883	return *ap_req->ticket.enc_part.kvno;
884	#endif
885	return 0;
886	}
887
888	static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
889	{
890	#ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
891	return ap_req->ticket.enc_part.etype;
892	#else /* MIT */
893	return ap_req->ticket->enc_part.enctype;
894	#endif
895	}
896	#endif /* HAVE_KRB5_DECODE_AP_REQ */
897
898	static krb5_error_code
899	get_key_from_keytab(krb5_context context,
900	krb5_const_principal server,
901	krb5_enctype enctype,
902	krb5_kvno kvno,
903	krb5_keyblock **out_key)
904	{
905	krb5_keytab_entry entry;
906	krb5_error_code ret;
907	krb5_keytab keytab;
908	char *name = NULL;
909
910	/* We have to open a new keytab handle here, as MIT does
911	an implicit open/getnext/close on krb5_kt_get_entry. We
912	may be in the middle of a keytab enumeration when this is
913	called. JRA. */
914
915	ret = krb5_kt_default(context, &keytab);
916	if (ret) {
917	DEBUG(0,("get_key_from_keytab: failed to open keytab: %s\n", error_message(ret)));
918	return ret;
919	}
920
921	if ( DEBUGLEVEL >= 10 ) {
922	if (smb_krb5_unparse_name(context, server, &name) == 0) {
923	DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
924	kvno, enctype, name));
925	SAFE_FREE(name);
926	}
927	}
928
929	ret = krb5_kt_get_entry(context,
930	keytab,
931	server,
932	kvno,
933	enctype,
934	&entry);
935
936	if (ret) {
937	DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
938	goto out;
939	}
940
941	#ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
942	ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
943	#elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
944	ret = krb5_copy_keyblock(context, &entry.key, out_key);
945	#else
946	#error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
947	#endif
948
949	if (ret) {
950	DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
951	goto out;
952	}
953
954	smb_krb5_kt_free_entry(context, &entry);
955
956	out:
957	krb5_kt_close(context, keytab);
958	return ret;
959	}
960
961	/* Prototypes */
962
963	krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
964	const krb5_data *inbuf,
965	krb5_kvno *kvno,
966	krb5_enctype *enctype)
967	{
968	#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
969	{
970	krb5_error_code ret;
971	krb5_ap_req ap_req;
972
973	ret = krb5_decode_ap_req(context, inbuf, &ap_req);
974	if (ret)
975	return ret;
976
977	*kvno = get_kvno_from_ap_req(&ap_req);
978	*enctype = get_enctype_from_ap_req(&ap_req);
979
980	free_AP_REQ(&ap_req);
981	return 0;
982	}
983	#endif
984
985	/* Possibly not an appropriate error code. */
986	return KRB5KDC_ERR_BADOPTION;
987	}
988
989	krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
990	krb5_auth_context *auth_context,
991	const krb5_data *inbuf,
992	krb5_const_principal server,
993	krb5_keytab keytab,
994	krb5_flags *ap_req_options,
995	krb5_ticket **ticket,
996	krb5_keyblock **keyblock)
997	{
998	krb5_error_code ret;
999	krb5_kvno kvno;
1000	krb5_enctype enctype;
1001	krb5_keyblock *local_keyblock;
1002
1003	ret = krb5_rd_req(context,
1004	auth_context,
1005	inbuf,
1006	server,
1007	keytab,
1008	ap_req_options,
1009	ticket);
1010	if (ret) {
1011	return ret;
1012	}
1013
1014	#ifdef KRB5_TICKET_HAS_KEYINFO
1015	enctype = (*ticket)->enc_part.enctype;
1016	kvno = (*ticket)->enc_part.kvno;
1017	#else
1018	ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1019	if (ret) {
1020	return ret;
1021	}
1022	#endif
1023
1024	ret = get_key_from_keytab(context,
1025	server,
1026	enctype,
1027	kvno,
1028	&local_keyblock);
1029	if (ret) {
1030	DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1031	goto out;
1032	}
1033
1034	out:
1035	if (ret && local_keyblock != NULL) {
1036	krb5_free_keyblock(context, local_keyblock);
1037	} else {
1038	*keyblock = local_keyblock;
1039	}
1040
1041	return ret;
1042	}
1043
1044	krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1045	const char *name,
1046	krb5_principal *principal)
1047	{
1048	#ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1049	return smb_krb5_parse_name_norealm_conv(context, name, principal);
1050	#endif
1051
1052	/* we are cheating here because parse_name will in fact set the realm.
1053	* We don't care as the only caller of smb_krb5_parse_name_norealm
1054	* ignores the realm anyway when calling
1055	* smb_krb5_principal_compare_any_realm later - Guenther */
1056
1057	return smb_krb5_parse_name(context, name, principal);
1058	}
1059
1060	BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
1061	krb5_const_principal princ1,
1062	krb5_const_principal princ2)
1063	{
1064	#ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1065
1066	return krb5_principal_compare_any_realm(context, princ1, princ2);
1067
1068	/* krb5_princ_size is a macro in MIT */
1069	#elif defined(HAVE_KRB5_PRINC_SIZE) \|\| defined(krb5_princ_size)
1070
1071	int i, len1, len2;
1072	const krb5_data p1, p2;
1073
1074	len1 = krb5_princ_size(context, princ1);
1075	len2 = krb5_princ_size(context, princ2);
1076
1077	if (len1 != len2)
1078	return False;
1079
1080	for (i = 0; i < len1; i++) {
1081
1082	p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1083	p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1084
1085	if (p1->length != p2->length \|\| memcmp(p1->data, p2->data, p1->length))
1086	return False;
1087	}
1088
1089	return True;
1090	#else
1091	#error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1092	#endif
1093	}
1094
1095	krb5_error_code smb_krb5_renew_ticket(const char ccache_string, / FILE:/tmp/krb5cc_0 */
1096	const char client_string, / gd@BER.SUSE.DE */
1097	const char service_string, / krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1098	time_t *expire_time)
1099	{
1100	krb5_error_code ret;
1101	krb5_context context = NULL;
1102	krb5_ccache ccache = NULL;
1103	krb5_principal client = NULL;
1104
1105	initialize_krb5_error_table();
1106	ret = krb5_init_context(&context);
1107	if (ret) {
1108	goto done;
1109	}
1110
1111	if (!ccache_string) {
1112	ccache_string = krb5_cc_default_name(context);
1113	}
1114
1115	DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1116
1117	/* FIXME: we should not fall back to defaults */
1118	ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1119	if (ret) {
1120	goto done;
1121	}
1122
1123	#ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1124	{
1125	krb5_creds creds;
1126
1127	if (client_string) {
1128	ret = smb_krb5_parse_name(context, client_string, &client);
1129	if (ret) {
1130	goto done;
1131	}
1132	} else {
1133	ret = krb5_cc_get_principal(context, ccache, &client);
1134	if (ret) {
1135	goto done;
1136	}
1137	}
1138
1139	ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1140	if (ret) {
1141	DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1142	goto done;
1143	}
1144
1145	/* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1146	ret = krb5_cc_initialize(context, ccache, client);
1147	if (ret) {
1148	goto done;
1149	}
1150
1151	ret = krb5_cc_store_cred(context, ccache, &creds);
1152
1153	if (expire_time) {
1154	*expire_time = (time_t) creds.times.endtime;
1155	}
1156
1157	krb5_free_cred_contents(context, &creds);
1158	}
1159	#elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1160	{
1161	krb5_kdc_flags flags;
1162	krb5_creds creds_in;
1163	krb5_realm *client_realm;
1164	krb5_creds *creds;
1165
1166	memset(&creds_in, 0, sizeof(creds_in));
1167
1168	if (client_string) {
1169	ret = smb_krb5_parse_name(context, client_string, &creds_in.client);
1170	if (ret) {
1171	goto done;
1172	}
1173	} else {
1174	ret = krb5_cc_get_principal(context, ccache, &creds_in.client);
1175	if (ret) {
1176	goto done;
1177	}
1178	}
1179
1180	if (service_string) {
1181	ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1182	if (ret) {
1183	goto done;
1184	}
1185	} else {
1186	/* build tgt service by default */
1187	client_realm = krb5_princ_realm(context, creds_in.client);
1188	if (!client_realm) {
1189	ret = ENOMEM;
1190	goto done;
1191	}
1192	ret = krb5_make_principal(context, &creds_in.server, client_realm, KRB5_TGS_NAME, client_realm, NULL);
1193	if (ret) {
1194	goto done;
1195	}
1196	}
1197
1198	flags.i = 0;
1199	flags.b.renewable = flags.b.renew = True;
1200
1201	ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds);
1202	if (ret) {
1203	DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1204	goto done;
1205	}
1206
1207	/* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1208	ret = krb5_cc_initialize(context, ccache, creds_in.client);
1209	if (ret) {
1210	goto done;
1211	}
1212
1213	ret = krb5_cc_store_cred(context, ccache, creds);
1214
1215	if (expire_time) {
1216	*expire_time = (time_t) creds->times.endtime;
1217	}
1218
1219	krb5_free_cred_contents(context, &creds_in);
1220	krb5_free_creds(context, creds);
1221	}
1222	#else
1223	#error No suitable krb5 ticket renew function available
1224	#endif
1225
1226
1227	done:
1228	if (client) {
1229	krb5_free_principal(context, client);
1230	}
1231	if (context) {
1232	krb5_free_context(context);
1233	}
1234	if (ccache) {
1235	krb5_cc_close(context, ccache);
1236	}
1237
1238	return ret;
1239
1240	}
1241
1242	krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1243	{
1244	krb5_error_code ret = 0;
1245	if (addr == NULL) {
1246	return ret;
1247	}
1248	#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1249	krb5_free_addresses(context, addr->addrs);
1250	#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1251	ret = krb5_free_addresses(context, addr->addrs);
1252	SAFE_FREE(addr->addrs);
1253	#endif
1254	SAFE_FREE(addr);
1255	addr = NULL;
1256	return ret;
1257	}
1258
1259	krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1260	{
1261	krb5_error_code ret = 0;
1262	nstring buf;
1263	#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1264	krb5_address **addrs = NULL;
1265	#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1266	krb5_addresses *addrs = NULL;
1267	#endif
1268
1269	kerb_addr = (smb_krb5_addresses )SMB_MALLOC(sizeof(smb_krb5_addresses));
1270	if (*kerb_addr == NULL) {
1271	return ENOMEM;
1272	}
1273
1274	put_name(buf, global_myname(), ' ', 0x20);
1275
1276	#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1277	{
1278	int num_addr = 2;
1279
1280	addrs = (krb5_address *)SMB_MALLOC(sizeof(krb5_address ) * num_addr);
1281	if (addrs == NULL) {
1282	SAFE_FREE(kerb_addr);
1283	return ENOMEM;
1284	}
1285
1286	memset(addrs, 0, sizeof(krb5_address ) num_addr);
1287
1288	addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1289	if (addrs[0] == NULL) {
1290	SAFE_FREE(addrs);
1291	SAFE_FREE(kerb_addr);
1292	return ENOMEM;
1293	}
1294
1295	addrs[0]->magic = KV5M_ADDRESS;
1296	addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1297	addrs[0]->length = MAX_NETBIOSNAME_LEN;
1298	addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1299	if (addrs[0]->contents == NULL) {
1300	SAFE_FREE(addrs[0]);
1301	SAFE_FREE(addrs);
1302	SAFE_FREE(kerb_addr);
1303	return ENOMEM;
1304	}
1305
1306	memcpy(addrs[0]->contents, buf, addrs[0]->length);
1307
1308	addrs[1] = NULL;
1309	}
1310	#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1311	{
1312	addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1313	if (addrs == NULL) {
1314	SAFE_FREE(kerb_addr);
1315	return ENOMEM;
1316	}
1317
1318	memset(addrs, 0, sizeof(krb5_addresses));
1319
1320	addrs->len = 1;
1321	addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1322	if (addrs->val == NULL) {
1323	SAFE_FREE(addrs);
1324	SAFE_FREE(kerb_addr);
1325	return ENOMEM;
1326	}
1327
1328	addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1329	addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1330	addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1331	if (addrs->val[0].address.data == NULL) {
1332	SAFE_FREE(addrs->val);
1333	SAFE_FREE(addrs);
1334	SAFE_FREE(kerb_addr);
1335	return ENOMEM;
1336	}
1337
1338	memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1339	}
1340	#else
1341	#error UNKNOWN_KRB5_ADDRESS_FORMAT
1342	#endif
1343	(*kerb_addr)->addrs = addrs;
1344
1345	return ret;
1346	}
1347
1348	void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1349	{
1350	#ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1351	krb5_free_error_contents(context, krberror);
1352	#else /* MIT */
1353	krb5_free_error(context, krberror);
1354	#endif
1355	}
1356
1357	krb5_error_code handle_krberror_packet(krb5_context context,
1358	krb5_data *packet)
1359	{
1360	krb5_error_code ret;
1361	BOOL got_error_code = False;
1362
1363	DEBUG(10,("handle_krberror_packet: got error packet\n"));
1364
1365	#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1366	{
1367	krb5_error krberror;
1368
1369	if ((ret = krb5_rd_error(context, packet, &krberror))) {
1370	DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1371	error_message(ret)));
1372	return ret;
1373	}
1374
1375	if (krberror.e_data == NULL \|\| krberror.e_data->data == NULL) {
1376	ret = (krb5_error_code) krberror.error_code;
1377	got_error_code = True;
1378	}
1379
1380	smb_krb5_free_error(context, &krberror);
1381	}
1382	#else /* MIT */
1383	{
1384	krb5_error *krberror;
1385
1386	if ((ret = krb5_rd_error(context, packet, &krberror))) {
1387	DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1388	error_message(ret)));
1389	return ret;
1390	}
1391
1392	if (krberror->e_data.data == NULL) {
1393	ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1394	got_error_code = True;
1395	}
1396	smb_krb5_free_error(context, krberror);
1397	}
1398	#endif
1399	if (got_error_code) {
1400	DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1401	error_message(ret), ret));
1402	}
1403	return ret;
1404	}
1405
1406	krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1407	krb5_get_init_creds_opt **opt)
1408	{
1409	#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1410	/* Heimdal or modern MIT version */
1411	return krb5_get_init_creds_opt_alloc(context, opt);
1412	#else
1413	/* Historical MIT version */
1414	krb5_get_init_creds_opt *my_opt;
1415
1416	*opt = NULL;
1417
1418	if ((my_opt = SMB_MALLOC(sizeof(krb5_get_init_creds_opt))) == NULL) {
1419	return ENOMEM;
1420	}
1421
1422	krb5_get_init_creds_opt_init(my_opt);
1423
1424	*opt = my_opt;
1425	return 0;
1426	#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1427	}
1428
1429	void smb_krb5_get_init_creds_opt_free(krb5_context context,
1430	krb5_get_init_creds_opt *opt)
1431	{
1432	#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1433
1434	#ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1435	/* Modern MIT version */
1436	krb5_get_init_creds_opt_free(context, opt);
1437	#else
1438	/* Heimdal version */
1439	krb5_get_init_creds_opt_free(opt);
1440	#endif
1441
1442	#else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1443	/* Historical MIT version */
1444	SAFE_FREE(opt);
1445	opt = NULL;
1446	#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1447	}
1448
1449	krb5_error_code smb_krb5_mk_error(krb5_context context,
1450	krb5_error_code error_code,
1451	const krb5_principal server,
1452	krb5_data *reply)
1453	{
1454	#ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1455	/*
1456	* The MIT interface is terrible.
1457	* We have to construct this ourselves...
1458	*/
1459	krb5_error e;
1460
1461	memset(&e, 0, sizeof(e));
1462	krb5_us_timeofday(context, &e.stime, &e.susec);
1463	e.server = server;
1464	#if defined(krb5_err_base)
1465	e.error = error_code - krb5_err_base;
1466	#elif defined(ERROR_TABLE_BASE_krb5)
1467	e.error = error_code - ERROR_TABLE_BASE_krb5;
1468	#else
1469	e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1470	#endif
1471
1472	return krb5_mk_error(context, &e, reply);
1473	#else /* Heimdal. */
1474	return krb5_mk_error(context,
1475	error_code,
1476	NULL,
1477	NULL, /* e_data */
1478	NULL,
1479	server,
1480	NULL,
1481	NULL,
1482	reply);
1483	#endif
1484	}
1485
1486	#else /* HAVE_KRB5 */
1487	/* this saves a few linking headaches */
1488	int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1489	DATA_BLOB ticket, DATA_BLOB session_key_krb5, uint32 extra_ap_opts,
1490	const char ccname, time_t tgs_expire)
1491	{
1492	DEBUG(0,("NO KERBEROS SUPPORT\n"));
1493	return 1;
1494	}
1495
1496	#endif

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