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 2005-2009
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 3 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
24 #define KRB5_DEPRECATED 1 /* this file uses DEPRECATED interfaces! */
30 #define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
31 #define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
32 #define GSSAPI_CHECKSUM_SIZE (12+GSSAPI_BNDLENGTH)
34 #if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
35 static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
36 krb5_auth_context *auth_context,
39 krb5_data *authenticator);
42 /**************************************************************
43 Wrappers around kerberos string functions that convert from
44 utf8 -> unix charset and vica versa.
45 **************************************************************/
47 /**************************************************************
48 krb5_parse_name that takes a UNIX charset.
49 **************************************************************/
51 krb5_error_code smb_krb5_parse_name(krb5_context context,
52 const char *name, /* in unix charset */
53 krb5_principal *principal)
57 size_t converted_size;
59 if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
63 ret = krb5_parse_name(context, utf8_name, principal);
64 TALLOC_FREE(utf8_name);
68 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
69 /**************************************************************
70 krb5_parse_name_norealm that takes a UNIX charset.
71 **************************************************************/
73 static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
74 const char *name, /* in unix charset */
75 krb5_principal *principal)
79 size_t converted_size;
82 if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
86 ret = krb5_parse_name_norealm(context, utf8_name, principal);
87 TALLOC_FREE(utf8_name);
92 /**************************************************************
93 krb5_parse_name that returns a UNIX charset name. Must
94 be freed with talloc_free() call.
95 **************************************************************/
97 krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
99 krb5_const_principal principal,
104 size_t converted_size;
107 ret = krb5_unparse_name(context, principal, &utf8_name);
112 if (!pull_utf8_talloc(mem_ctx, unix_name, utf8_name, &converted_size)) {
113 krb5_free_unparsed_name(context, utf8_name);
116 krb5_free_unparsed_name(context, utf8_name);
120 #ifndef HAVE_KRB5_SET_REAL_TIME
122 * This function is not in the Heimdal mainline.
124 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
129 ret = krb5_us_timeofday(context, &sec, &usec);
133 context->kdc_sec_offset = seconds - sec;
134 context->kdc_usec_offset = microseconds - usec;
140 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
142 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
144 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
145 * to krb5_set_default_tgs_ktypes. See
146 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
148 * If the MIT libraries are not exporting internal symbols, we will end up in
149 * this branch, which is correct. Otherwise we will continue to use the
152 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
154 return krb5_set_default_tgs_enctypes(ctx, enc);
157 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
160 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
162 return krb5_set_default_in_tkt_etypes(ctx, enc);
165 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
167 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
169 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
171 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
173 memset(pkaddr, '\0', sizeof(krb5_address));
174 #if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
175 if (paddr->ss_family == AF_INET6) {
176 pkaddr->addr_type = KRB5_ADDRESS_INET6;
177 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
178 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
182 if (paddr->ss_family == AF_INET) {
183 pkaddr->addr_type = KRB5_ADDRESS_INET;
184 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
185 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
190 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
192 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
194 memset(pkaddr, '\0', sizeof(krb5_address));
195 #if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
196 if (paddr->ss_family == AF_INET6) {
197 pkaddr->addrtype = ADDRTYPE_INET6;
198 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
199 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
203 if (paddr->ss_family == AF_INET) {
204 pkaddr->addrtype = ADDRTYPE_INET;
205 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
206 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
212 #error UNKNOWN_ADDRTYPE
215 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
216 static int create_kerberos_key_from_string_direct(krb5_context context,
217 krb5_principal host_princ,
220 krb5_enctype enctype)
224 krb5_encrypt_block eblock;
226 ret = krb5_principal2salt(context, host_princ, &salt);
228 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
231 krb5_use_enctype(context, &eblock, enctype);
232 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
233 SAFE_FREE(salt.data);
237 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
238 static int create_kerberos_key_from_string_direct(krb5_context context,
239 krb5_principal host_princ,
242 krb5_enctype enctype)
247 ret = krb5_get_pw_salt(context, host_princ, &salt);
249 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
253 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
254 krb5_free_salt(context, salt);
259 #error UNKNOWN_CREATE_KEY_FUNCTIONS
262 int create_kerberos_key_from_string(krb5_context context,
263 krb5_principal host_princ,
266 krb5_enctype enctype,
269 krb5_principal salt_princ = NULL;
272 * Check if we've determined that the KDC is salting keys for this
273 * principal/enctype in a non-obvious way. If it is, try to match
277 KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
278 if (!KRB5_KEY_DATA(key)) {
281 memcpy(KRB5_KEY_DATA(key), password->data, password->length);
282 KRB5_KEY_LENGTH(key) = password->length;
283 KRB5_KEY_TYPE(key) = enctype;
286 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
287 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
289 krb5_free_principal(context, salt_princ);
294 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
295 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
296 krb5_enctype **enctypes)
298 return krb5_get_permitted_enctypes(context, enctypes);
300 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
301 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
302 krb5_enctype **enctypes)
304 return krb5_get_default_in_tkt_etypes(context, enctypes);
307 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
310 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
311 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
312 krb5_auth_context auth_context,
313 krb5_keyblock *keyblock)
315 return krb5_auth_con_setkey(context, auth_context, keyblock);
319 bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
321 DATA_BLOB *edata_out)
323 DATA_BLOB edata_contents;
327 if (!edata->length) {
331 data = asn1_init(mem_ctx);
336 asn1_load(data, *edata);
337 asn1_start_tag(data, ASN1_SEQUENCE(0));
338 asn1_start_tag(data, ASN1_CONTEXT(1));
339 asn1_read_Integer(data, &edata_type);
341 if (edata_type != KRB5_PADATA_PW_SALT) {
342 DEBUG(0,("edata is not of required type %d but of type %d\n",
343 KRB5_PADATA_PW_SALT, edata_type));
348 asn1_start_tag(data, ASN1_CONTEXT(2));
349 asn1_read_OctetString(data, talloc_autofree_context(), &edata_contents);
355 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
357 data_blob_free(&edata_contents);
363 bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
365 DATA_BLOB pac_contents;
369 if (!auth_data->length) {
373 data = asn1_init(mem_ctx);
378 asn1_load(data, *auth_data);
379 asn1_start_tag(data, ASN1_SEQUENCE(0));
380 asn1_start_tag(data, ASN1_SEQUENCE(0));
381 asn1_start_tag(data, ASN1_CONTEXT(0));
382 asn1_read_Integer(data, &data_type);
384 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
385 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
391 asn1_start_tag(data, ASN1_CONTEXT(1));
392 asn1_read_OctetString(data, talloc_autofree_context(), &pac_contents);
398 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
400 data_blob_free(&pac_contents);
405 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
407 DATA_BLOB auth_data_wrapped;
408 bool got_auth_data_pac = False;
411 #if defined(HAVE_KRB5_TKT_ENC_PART2)
412 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
413 tkt->enc_part2->authorization_data[0] &&
414 tkt->enc_part2->authorization_data[0]->length)
416 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
418 if (tkt->enc_part2->authorization_data[i]->ad_type !=
419 KRB5_AUTHDATA_IF_RELEVANT) {
420 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
421 tkt->enc_part2->authorization_data[i]->ad_type));
425 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
426 tkt->enc_part2->authorization_data[i]->length);
428 /* check if it is a PAC */
429 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
430 data_blob_free(&auth_data_wrapped);
432 if (got_auth_data_pac) {
437 return got_auth_data_pac;
441 if (tkt->ticket.authorization_data &&
442 tkt->ticket.authorization_data->len)
444 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
446 if (tkt->ticket.authorization_data->val[i].ad_type !=
447 KRB5_AUTHDATA_IF_RELEVANT) {
448 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
449 tkt->ticket.authorization_data->val[i].ad_type));
453 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
454 tkt->ticket.authorization_data->val[i].ad_data.length);
456 /* check if it is a PAC */
457 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
458 data_blob_free(&auth_data_wrapped);
460 if (got_auth_data_pac) {
465 return got_auth_data_pac;
471 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
473 #if defined(HAVE_KRB5_TKT_ENC_PART2)
474 return tkt->enc_part2->client;
480 #if !defined(HAVE_KRB5_LOCATE_KDC)
482 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
483 * to a public interface for this functionality, so we have to be able to live
484 * without it if the MIT libraries are hiding their internal symbols.
487 #if defined(KRB5_KRBHST_INIT)
489 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
491 krb5_krbhst_handle hnd;
492 krb5_krbhst_info *hinfo;
501 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
503 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
507 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
510 krb5_krbhst_reset(ctx, hnd);
513 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
514 krb5_krbhst_free(ctx, hnd);
518 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
520 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
521 krb5_krbhst_free(ctx, hnd);
526 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
528 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
530 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
531 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
533 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
537 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
538 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
541 krb5_krbhst_free(ctx, hnd);
548 #else /* ! defined(KRB5_KRBHST_INIT) */
550 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
551 struct sockaddr **addr_pp, int *naddrs, int get_masters)
553 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
554 return KRB5_KDC_UNREACH;
557 #endif /* KRB5_KRBHST_INIT */
559 #else /* ! HAVE_KRB5_LOCATE_KDC */
561 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
562 struct sockaddr **addr_pp, int *naddrs, int get_masters)
564 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
567 #endif /* HAVE_KRB5_LOCATE_KDC */
569 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
570 void krb5_free_unparsed_name(krb5_context context, char *val)
576 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
578 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
580 krb5_free_data_contents(context, pdata);
583 SAFE_FREE(pdata->data);
587 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
589 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
590 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
591 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
592 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
594 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
598 bool kerberos_compatible_enctypes(krb5_context context,
599 krb5_enctype enctype1,
600 krb5_enctype enctype2)
602 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
603 krb5_boolean similar = 0;
605 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
606 return similar ? True : False;
607 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
608 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
612 static bool ads_cleanup_expired_creds(krb5_context context,
616 krb5_error_code retval;
617 const char *cc_type = krb5_cc_get_type(context, ccache);
619 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
620 cc_type, krb5_cc_get_name(context, ccache),
621 http_timestring(talloc_tos(), credsp->times.endtime)));
623 /* we will probably need new tickets if the current ones
624 will expire within 10 seconds.
626 if (credsp->times.endtime >= (time(NULL) + 10))
629 /* heimdal won't remove creds from a file ccache, and
630 perhaps we shouldn't anyway, since internally we
631 use memory ccaches, and a FILE one probably means that
632 we're using creds obtained outside of our exectuable
634 if (strequal(cc_type, "FILE")) {
635 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
639 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
641 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
642 error_message(retval)));
643 /* If we have an error in this, we want to display it,
644 but continue as though we deleted it */
650 we can't use krb5_mk_req because w2k wants the service to be in a particular format
652 static krb5_error_code ads_krb5_mk_req(krb5_context context,
653 krb5_auth_context *auth_context,
654 const krb5_flags ap_req_options,
655 const char *principal,
659 const char *impersonate_princ_s)
661 krb5_error_code retval;
662 krb5_principal server;
663 krb5_principal impersonate_princ = NULL;
667 bool creds_ready = False;
668 int i = 0, maxtries = 3;
670 ZERO_STRUCT(in_data);
672 retval = smb_krb5_parse_name(context, principal, &server);
674 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
678 if (impersonate_princ_s) {
679 retval = smb_krb5_parse_name(context, impersonate_princ_s,
682 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", impersonate_princ_s));
687 /* obtain ticket & session key */
689 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
690 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
691 error_message(retval)));
695 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
696 /* This can commonly fail on smbd startup with no ticket in the cache.
697 * Report at higher level than 1. */
698 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
699 error_message(retval)));
703 while (!creds_ready && (i < maxtries)) {
705 if ((retval = smb_krb5_get_credentials(context, ccache,
710 DEBUG(1,("ads_krb5_mk_req: smb_krb5_get_credentials failed for %s (%s)\n",
711 principal, error_message(retval)));
715 /* cope with ticket being in the future due to clock skew */
716 if ((unsigned)credsp->times.starttime > time(NULL)) {
717 time_t t = time(NULL);
718 int time_offset =(int)((unsigned)credsp->times.starttime-t);
719 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
720 krb5_set_real_time(context, t + time_offset + 1, 0);
723 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
730 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
731 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
732 http_timestring(talloc_tos(), (unsigned)credsp->times.endtime),
733 (unsigned)credsp->times.endtime));
736 *expire_time = (time_t)credsp->times.endtime;
739 #if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
740 if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
741 /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
742 as part of the kerberos exchange. */
744 DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
746 if( *auth_context == NULL ) {
747 /* Allocate if it has not yet been allocated. */
748 retval = krb5_auth_con_init( context, auth_context );
750 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_init failed (%s)\n",
751 error_message(retval)));
756 retval = krb5_auth_con_setuseruserkey( context, *auth_context, &credsp->keyblock );
758 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setuseruserkey failed (%s)\n",
759 error_message(retval)));
763 /* Must use a subkey for forwarded tickets. */
764 retval = krb5_auth_con_setflags( context, *auth_context, KRB5_AUTH_CONTEXT_USE_SUBKEY);
766 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setflags failed (%s)\n",
767 error_message(retval)));
771 retval = ads_krb5_get_fwd_ticket( context,
777 DEBUG( 3, ("ads_krb5_get_fwd_ticket failed (%s)\n",
778 error_message( retval ) ) );
781 * This is not fatal. Delete the *auth_context and continue
782 * with krb5_mk_req_extended to get a non-forwardable ticket.
786 free( in_data.data );
790 krb5_auth_con_free(context, *auth_context);
791 *auth_context = NULL;
796 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
797 &in_data, credsp, outbuf);
799 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
800 error_message(retval)));
804 free( in_data.data );
808 krb5_free_creds(context, credsp);
811 krb5_free_cred_contents(context, &creds);
814 krb5_free_principal(context, server);
815 if (impersonate_princ) {
816 krb5_free_principal(context, impersonate_princ);
823 get a kerberos5 ticket for the given service
825 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
826 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
827 uint32 extra_ap_opts, const char *ccname,
829 const char *impersonate_princ_s)
832 krb5_error_code retval;
834 krb5_context context = NULL;
835 krb5_ccache ccdef = NULL;
836 krb5_auth_context auth_context = NULL;
837 krb5_enctype enc_types[] = {
838 #ifdef ENCTYPE_ARCFOUR_HMAC
839 ENCTYPE_ARCFOUR_HMAC,
845 initialize_krb5_error_table();
846 retval = krb5_init_context(&context);
848 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
849 error_message(retval)));
853 if (time_offset != 0) {
854 krb5_set_real_time(context, time(NULL) + time_offset, 0);
857 if ((retval = krb5_cc_resolve(context, ccname ?
858 ccname : krb5_cc_default_name(context), &ccdef))) {
859 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
860 error_message(retval)));
864 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
865 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
866 error_message(retval)));
870 if ((retval = ads_krb5_mk_req(context,
872 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
876 impersonate_princ_s))) {
880 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
882 *ticket = data_blob(packet.data, packet.length);
884 kerberos_free_data_contents(context, &packet);
890 krb5_cc_close(context, ccdef);
892 krb5_auth_con_free(context, auth_context);
893 krb5_free_context(context);
899 bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
901 krb5_keyblock *skey = NULL;
902 krb5_error_code err = 0;
906 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
908 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
911 if (err || skey == NULL) {
912 DEBUG(10, ("KRB5 error getting session key %d\n", err));
916 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
917 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
918 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
924 krb5_free_keyblock(context, skey);
931 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
932 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
934 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
936 static krb5_data kdata;
938 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
939 kdata.length = strlen((const char *)kdata.data);
944 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
946 /* Try krb5_free_keytab_entry_contents first, since
947 * MIT Kerberos >= 1.7 has both krb5_free_keytab_entry_contents and
948 * krb5_kt_free_entry but only has a prototype for the first, while the
949 * second is considered private.
951 #if defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
952 return krb5_free_keytab_entry_contents(context, kt_entry);
953 #elif defined(HAVE_KRB5_KT_FREE_ENTRY)
954 return krb5_kt_free_entry(context, kt_entry);
956 #error UNKNOWN_KT_FREE_FUNCTION
960 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
961 struct PAC_SIGNATURE_DATA *sig)
963 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
964 cksum->cksumtype = (krb5_cksumtype)sig->type;
965 cksum->checksum.length = sig->signature.length;
966 cksum->checksum.data = sig->signature.data;
968 cksum->checksum_type = (krb5_cksumtype)sig->type;
969 cksum->length = sig->signature.length;
970 cksum->contents = sig->signature.data;
974 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
975 const krb5_keyblock *keyblock,
977 krb5_checksum *cksum,
983 /* verify the checksum */
985 /* welcome to the wonderful world of samba's kerberos abstraction layer:
987 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
988 * -----------------------------------------------------------------------------
989 * krb5_c_verify_checksum - works works
990 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
993 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
995 krb5_boolean checksum_valid = False;
998 input.data = (char *)data;
999 input.length = length;
1001 ret = krb5_c_verify_checksum(context,
1008 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
1009 error_message(ret)));
1013 if (!checksum_valid)
1014 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1017 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
1019 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
1020 * without enctype and it ignores any key_usage types - Guenther */
1025 ret = krb5_crypto_init(context,
1030 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
1031 error_message(ret)));
1035 ret = krb5_verify_checksum(context,
1042 krb5_crypto_destroy(context, crypto);
1046 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
1052 time_t get_authtime_from_tkt(krb5_ticket *tkt)
1054 #if defined(HAVE_KRB5_TKT_ENC_PART2)
1055 return tkt->enc_part2->times.authtime;
1057 return tkt->ticket.authtime;
1061 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1062 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
1064 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
1065 if (ap_req->ticket->enc_part.kvno)
1066 return ap_req->ticket->enc_part.kvno;
1068 if (ap_req->ticket.enc_part.kvno)
1069 return *ap_req->ticket.enc_part.kvno;
1074 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
1076 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
1077 return ap_req->ticket.enc_part.etype;
1079 return ap_req->ticket->enc_part.enctype;
1082 #endif /* HAVE_KRB5_DECODE_AP_REQ */
1084 static krb5_error_code
1085 get_key_from_keytab(krb5_context context,
1086 krb5_const_principal server,
1087 krb5_enctype enctype,
1089 krb5_keyblock **out_key)
1091 krb5_keytab_entry entry;
1092 krb5_error_code ret;
1095 krb5_keyblock *keyp;
1097 /* We have to open a new keytab handle here, as MIT does
1098 an implicit open/getnext/close on krb5_kt_get_entry. We
1099 may be in the middle of a keytab enumeration when this is
1102 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
1104 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
1108 if ( DEBUGLEVEL >= 10 ) {
1109 if (smb_krb5_unparse_name(talloc_tos(), context, server, &name) == 0) {
1110 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
1111 kvno, enctype, name));
1116 ret = krb5_kt_get_entry(context,
1124 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1128 keyp = KRB5_KT_KEY(&entry);
1130 ret = krb5_copy_keyblock(context, keyp, out_key);
1132 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1136 smb_krb5_kt_free_entry(context, &entry);
1139 krb5_kt_close(context, keytab);
1145 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1146 const krb5_data *inbuf,
1148 krb5_enctype *enctype)
1150 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1152 krb5_error_code ret;
1155 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1159 *kvno = get_kvno_from_ap_req(&ap_req);
1160 *enctype = get_enctype_from_ap_req(&ap_req);
1162 free_AP_REQ(&ap_req);
1167 /* Possibly not an appropriate error code. */
1168 return KRB5KDC_ERR_BADOPTION;
1171 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1172 krb5_auth_context *auth_context,
1173 const krb5_data *inbuf,
1174 krb5_const_principal server,
1176 krb5_flags *ap_req_options,
1177 krb5_ticket **ticket,
1178 krb5_keyblock **keyblock)
1180 krb5_error_code ret;
1182 krb5_enctype enctype;
1183 krb5_keyblock *local_keyblock;
1185 ret = krb5_rd_req(context,
1196 #ifdef KRB5_TICKET_HAS_KEYINFO
1197 enctype = (*ticket)->enc_part.enctype;
1198 kvno = (*ticket)->enc_part.kvno;
1200 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1206 ret = get_key_from_keytab(context,
1212 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1217 if (ret && local_keyblock != NULL) {
1218 krb5_free_keyblock(context, local_keyblock);
1220 *keyblock = local_keyblock;
1226 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1228 krb5_principal *principal)
1230 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1231 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1234 /* we are cheating here because parse_name will in fact set the realm.
1235 * We don't care as the only caller of smb_krb5_parse_name_norealm
1236 * ignores the realm anyway when calling
1237 * smb_krb5_principal_compare_any_realm later - Guenther */
1239 return smb_krb5_parse_name(context, name, principal);
1242 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1243 krb5_const_principal princ1,
1244 krb5_const_principal princ2)
1246 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1248 return krb5_principal_compare_any_realm(context, princ1, princ2);
1250 /* krb5_princ_size is a macro in MIT */
1251 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1254 const krb5_data *p1, *p2;
1256 len1 = krb5_princ_size(context, princ1);
1257 len2 = krb5_princ_size(context, princ2);
1262 for (i = 0; i < len1; i++) {
1264 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1265 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1267 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1273 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1277 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1278 const char *client_string, /* gd@BER.SUSE.DE */
1279 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1280 time_t *expire_time)
1282 krb5_error_code ret;
1283 krb5_context context = NULL;
1284 krb5_ccache ccache = NULL;
1285 krb5_principal client = NULL;
1286 krb5_creds creds, creds_in, *creds_out = NULL;
1289 ZERO_STRUCT(creds_in);
1291 initialize_krb5_error_table();
1292 ret = krb5_init_context(&context);
1297 if (!ccache_string) {
1298 ccache_string = krb5_cc_default_name(context);
1301 if (!ccache_string) {
1306 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1308 /* FIXME: we should not fall back to defaults */
1309 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1314 if (client_string) {
1315 ret = smb_krb5_parse_name(context, client_string, &client);
1320 ret = krb5_cc_get_principal(context, ccache, &client);
1326 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1328 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1330 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1334 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1336 krb5_kdc_flags flags;
1337 krb5_realm *client_realm = NULL;
1339 ret = krb5_copy_principal(context, client, &creds_in.client);
1344 if (service_string) {
1345 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1350 /* build tgt service by default */
1351 client_realm = krb5_princ_realm(context, creds_in.client);
1352 if (!client_realm) {
1356 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1363 flags.b.renewable = flags.b.renew = True;
1365 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1367 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1374 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1377 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1378 ret = krb5_cc_initialize(context, ccache, client);
1383 ret = krb5_cc_store_cred(context, ccache, &creds);
1386 *expire_time = (time_t) creds.times.endtime;
1390 krb5_free_cred_contents(context, &creds_in);
1393 krb5_free_creds(context, creds_out);
1395 krb5_free_cred_contents(context, &creds);
1399 krb5_free_principal(context, client);
1402 krb5_cc_close(context, ccache);
1405 krb5_free_context(context);
1411 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1413 krb5_error_code ret = 0;
1417 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1418 krb5_free_addresses(context, addr->addrs);
1419 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1420 ret = krb5_free_addresses(context, addr->addrs);
1421 SAFE_FREE(addr->addrs);
1428 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1430 krb5_error_code ret = 0;
1432 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1433 krb5_address **addrs = NULL;
1434 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1435 krb5_addresses *addrs = NULL;
1438 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1439 if (*kerb_addr == NULL) {
1443 put_name(buf, global_myname(), ' ', 0x20);
1445 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1449 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1450 if (addrs == NULL) {
1451 SAFE_FREE(*kerb_addr);
1455 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1457 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1458 if (addrs[0] == NULL) {
1460 SAFE_FREE(*kerb_addr);
1464 addrs[0]->magic = KV5M_ADDRESS;
1465 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1466 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1467 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1468 if (addrs[0]->contents == NULL) {
1469 SAFE_FREE(addrs[0]);
1471 SAFE_FREE(*kerb_addr);
1475 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1479 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1481 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1482 if (addrs == NULL) {
1483 SAFE_FREE(*kerb_addr);
1487 memset(addrs, 0, sizeof(krb5_addresses));
1490 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1491 if (addrs->val == NULL) {
1493 SAFE_FREE(kerb_addr);
1497 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1498 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1499 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1500 if (addrs->val[0].address.data == NULL) {
1501 SAFE_FREE(addrs->val);
1503 SAFE_FREE(*kerb_addr);
1507 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1510 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1512 (*kerb_addr)->addrs = addrs;
1517 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1519 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1520 krb5_free_error_contents(context, krberror);
1522 krb5_free_error(context, krberror);
1526 krb5_error_code handle_krberror_packet(krb5_context context,
1529 krb5_error_code ret;
1530 bool got_error_code = False;
1532 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1534 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1536 krb5_error krberror;
1538 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1539 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1540 error_message(ret)));
1544 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1545 ret = (krb5_error_code) krberror.error_code;
1546 got_error_code = True;
1549 smb_krb5_free_error(context, &krberror);
1553 krb5_error *krberror;
1555 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1556 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1557 error_message(ret)));
1561 if (krberror->e_data.data == NULL) {
1562 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1563 got_error_code = True;
1565 smb_krb5_free_error(context, krberror);
1568 if (got_error_code) {
1569 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1570 error_message(ret), ret));
1575 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1576 krb5_get_init_creds_opt **opt)
1578 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1579 /* Heimdal or modern MIT version */
1580 return krb5_get_init_creds_opt_alloc(context, opt);
1582 /* Historical MIT version */
1583 krb5_get_init_creds_opt *my_opt;
1587 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1591 krb5_get_init_creds_opt_init(my_opt);
1595 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1598 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1599 krb5_get_init_creds_opt *opt)
1601 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1603 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1604 /* Modern MIT or Heimdal version */
1605 krb5_get_init_creds_opt_free(context, opt);
1607 /* Heimdal version */
1608 krb5_get_init_creds_opt_free(opt);
1609 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1611 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1612 /* Historical MIT version */
1615 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1618 krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry)
1620 return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
1624 /* caller needs to free etype_s */
1625 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1626 krb5_enctype enctype,
1629 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1630 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1631 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1633 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1637 *etype_s = SMB_STRDUP(buf);
1643 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1647 krb5_error_code smb_krb5_mk_error(krb5_context context,
1648 krb5_error_code error_code,
1649 const krb5_principal server,
1652 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1654 * The MIT interface is *terrible*.
1655 * We have to construct this ourselves...
1659 memset(&e, 0, sizeof(e));
1660 krb5_us_timeofday(context, &e.stime, &e.susec);
1662 #if defined(krb5_err_base)
1663 e.error = error_code - krb5_err_base;
1664 #elif defined(ERROR_TABLE_BASE_krb5)
1665 e.error = error_code - ERROR_TABLE_BASE_krb5;
1667 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1670 return krb5_mk_error(context, &e, reply);
1671 #else /* Heimdal. */
1672 return krb5_mk_error(context,
1684 /**********************************************************************
1685 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1686 * allows to process non-default keytab names.
1687 * @param context krb5_context
1688 * @param keytab_name_req string
1689 * @param write_access bool if writable keytab is required
1690 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1691 * @return krb5_error_code
1692 **********************************************************************/
1694 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1695 #ifndef MAX_KEYTAB_NAME_LEN
1696 #define MAX_KEYTAB_NAME_LEN 1100
1699 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1700 const char *keytab_name_req,
1702 krb5_keytab *keytab)
1704 krb5_error_code ret = 0;
1705 TALLOC_CTX *mem_ctx;
1706 char keytab_string[MAX_KEYTAB_NAME_LEN];
1707 char *kt_str = NULL;
1708 bool found_valid_name = False;
1709 const char *pragma = "FILE";
1710 const char *tmp = NULL;
1712 if (!write_access && !keytab_name_req) {
1713 /* caller just wants to read the default keytab readonly, so be it */
1714 return krb5_kt_default(context, keytab);
1717 mem_ctx = talloc_init("smb_krb5_open_keytab");
1722 #ifdef HAVE_WRFILE_KEYTAB
1728 if (keytab_name_req) {
1730 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1731 ret = KRB5_CONFIG_NOTENUFSPACE;
1735 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1736 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1737 tmp = keytab_name_req;
1741 if (keytab_name_req[0] != '/') {
1742 ret = KRB5_KT_BADNAME;
1746 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1755 /* we need to handle more complex keytab_strings, like:
1756 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1758 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1763 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1765 tmp = talloc_strdup(mem_ctx, keytab_string);
1771 if (strncmp(tmp, "ANY:", 4) == 0) {
1775 memset(&keytab_string, '\0', sizeof(keytab_string));
1777 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1778 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1779 found_valid_name = True;
1784 if (strncmp(kt_str, "FILE:", 5) == 0) {
1785 found_valid_name = True;
1790 if (tmp[0] == '/') {
1791 /* Treat as a FILE: keytab definition. */
1792 found_valid_name = true;
1795 if (found_valid_name) {
1796 if (tmp[0] != '/') {
1797 ret = KRB5_KT_BADNAME;
1801 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1810 if (!found_valid_name) {
1811 ret = KRB5_KT_UNKNOWN_TYPE;
1816 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1817 ret = krb5_kt_resolve(context, tmp, keytab);
1820 TALLOC_FREE(mem_ctx);
1824 krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
1825 krb5_context context,
1827 const char **keytab_name)
1829 char keytab_string[MAX_KEYTAB_NAME_LEN];
1830 krb5_error_code ret = 0;
1832 ret = krb5_kt_get_name(context, keytab,
1833 keytab_string, MAX_KEYTAB_NAME_LEN - 2);
1838 *keytab_name = talloc_strdup(mem_ctx, keytab_string);
1839 if (!*keytab_name) {
1846 #if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
1847 /**************************************************************
1848 Routine: ads_krb5_get_fwd_ticket
1850 When a service ticket is flagged as trusted
1851 for delegation we should provide a forwardable
1852 ticket so that the remote host can act on our
1853 behalf. This is done by taking the 2nd forwardable
1854 TGT and storing it in the GSS-API authenticator
1855 "checksum". This routine will populate
1856 the krb5_data authenticator with this TGT.
1858 krb5_context context: The kerberos context for this authentication.
1859 krb5_auth_context: The authentication context.
1860 krb5_creds *credsp: The ticket credentials (AS-REP).
1861 krb5_ccache ccache: The credentials cache.
1862 krb5_data &authenticator: The checksum field that will store the TGT, and
1863 authenticator.data must be freed by the caller.
1866 krb5_error_code: 0 if no errors, otherwise set.
1867 **************************************************************/
1869 static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
1870 krb5_auth_context *auth_context,
1873 krb5_data *authenticator)
1876 krb5_error_code retval = 0;
1877 char *pChksum = NULL;
1880 /* MIT krb5 1.7beta3 (in Ubuntu Karmic) is missing the prototype,
1881 but still has the symbol */
1882 #if !HAVE_DECL_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE
1883 krb5_error_code krb5_auth_con_set_req_cksumtype(
1884 krb5_context context,
1885 krb5_auth_context auth_context,
1886 krb5_cksumtype cksumtype);
1889 ZERO_STRUCT(fwdData);
1890 ZERO_STRUCTP(authenticator);
1892 retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
1893 *auth_context, /* Authentication context [in] */
1894 CONST_DISCARD(char *, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
1895 credsp->client, /* Client principal for the tgt [in] */
1896 credsp->server, /* Server principal for the tgt [in] */
1897 ccache, /* Credential cache to use for storage [in] */
1898 1, /* Turn on for "Forwardable ticket" [in] */
1899 &fwdData ); /* Resulting response [out] */
1903 DEBUG(1,("ads_krb5_get_fwd_ticket: krb5_fwd_tgt_creds failed (%s)\n",
1904 error_message(retval)));
1908 if ((unsigned int)GSSAPI_CHECKSUM_SIZE + (unsigned int)fwdData.length <
1909 (unsigned int)GSSAPI_CHECKSUM_SIZE) {
1914 /* We're going to allocate a gssChecksum structure with a little
1915 extra data the length of the kerberos credentials length
1916 (APPLICATION 22) so that we can pack it on the end of the structure.
1919 pChksum = (char *)SMB_MALLOC(GSSAPI_CHECKSUM_SIZE + fwdData.length );
1927 SIVAL(p, 0, GSSAPI_BNDLENGTH);
1930 /* Zero out the bindings fields */
1931 memset(p, '\0', GSSAPI_BNDLENGTH );
1932 p += GSSAPI_BNDLENGTH;
1934 SIVAL(p, 0, GSS_C_DELEG_FLAG );
1938 SSVAL(p, 0, fwdData.length );
1941 /* Migrate the kerberos KRB_CRED data to the checksum delegation */
1942 memcpy(p, fwdData.data, fwdData.length );
1943 p += fwdData.length;
1945 /* We need to do this in order to allow our GSS-API */
1946 retval = krb5_auth_con_set_req_cksumtype( context, *auth_context, GSSAPI_CHECKSUM );
1951 /* We now have a service ticket, now turn it into an AP-REQ. */
1952 authenticator->length = fwdData.length + GSSAPI_CHECKSUM_SIZE;
1954 /* Caller should call free() when they're done with this. */
1955 authenticator->data = (char *)pChksum;
1959 /* Remove that input data, we never needed it anyway. */
1960 if (fwdData.length > 0) {
1961 krb5_free_data_contents( context, &fwdData );
1968 #if defined(HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE) && \
1969 defined(HAVE_KRB5_GET_CREDS_OPT_ALLOC) && \
1970 defined(HAVE_KRB5_GET_CREDS)
1971 static krb5_error_code smb_krb5_get_credentials_for_user_opt(krb5_context context,
1974 krb5_principal server,
1975 krb5_principal impersonate_princ,
1976 krb5_creds **out_creds)
1978 krb5_error_code ret;
1979 krb5_get_creds_opt opt;
1981 ret = krb5_get_creds_opt_alloc(context, &opt);
1985 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
1987 if (impersonate_princ) {
1988 ret = krb5_get_creds_opt_set_impersonate(context, opt,
1995 ret = krb5_get_creds(context, opt, ccache, server, out_creds);
2002 krb5_get_creds_opt_free(context, opt);
2006 #endif /* HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE */
2008 #ifdef HAVE_KRB5_GET_CREDENTIALS_FOR_USER
2009 static krb5_error_code smb_krb5_get_credentials_for_user(krb5_context context,
2012 krb5_principal server,
2013 krb5_principal impersonate_princ,
2014 krb5_creds **out_creds)
2016 krb5_error_code ret;
2017 krb5_creds in_creds;
2019 #if !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER
2020 krb5_error_code KRB5_CALLCONV
2021 krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
2022 krb5_ccache ccache, krb5_creds *in_creds,
2023 krb5_data *subject_cert,
2024 krb5_creds **out_creds);
2025 #endif /* !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER */
2027 ZERO_STRUCT(in_creds);
2029 if (impersonate_princ) {
2031 in_creds.server = me;
2032 in_creds.client = impersonate_princ;
2034 ret = krb5_get_credentials_for_user(context,
2035 0, /* krb5_flags options */
2038 NULL, /* krb5_data *subject_cert */
2041 in_creds.client = me;
2042 in_creds.server = server;
2044 ret = krb5_get_credentials(context, 0, ccache,
2045 &in_creds, out_creds);
2050 #endif /* HAVE_KRB5_GET_CREDENTIALS_FOR_USER */
2053 * smb_krb5_get_credentials
2055 * @brief Get krb5 credentials for a server
2057 * @param[in] context An initialized krb5_context
2058 * @param[in] ccache An initialized krb5_ccache
2059 * @param[in] me The krb5_principal of the caller
2060 * @param[in] server The krb5_principal of the requested service
2061 * @param[in] impersonate_princ The krb5_principal of a user to impersonate as (optional)
2062 * @param[out] out_creds The returned krb5_creds structure
2063 * @return krb5_error_code
2066 krb5_error_code smb_krb5_get_credentials(krb5_context context,
2069 krb5_principal server,
2070 krb5_principal impersonate_princ,
2071 krb5_creds **out_creds)
2073 krb5_error_code ret;
2074 krb5_creds *creds = NULL;
2078 if (impersonate_princ) {
2079 #ifdef HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE /* Heimdal */
2080 ret = smb_krb5_get_credentials_for_user_opt(context, ccache, me, server, impersonate_princ, &creds);
2081 #elif defined(HAVE_KRB5_GET_CREDENTIALS_FOR_USER) /* MIT */
2082 ret = smb_krb5_get_credentials_for_user(context, ccache, me, server, impersonate_princ, &creds);
2087 krb5_creds in_creds;
2089 ZERO_STRUCT(in_creds);
2091 in_creds.client = me;
2092 in_creds.server = server;
2094 ret = krb5_get_credentials(context, 0, ccache,
2101 ret = krb5_cc_store_cred(context, ccache, creds);
2112 krb5_free_creds(context, creds);
2119 * smb_krb5_get_creds
2121 * @brief Get krb5 credentials for a server
2123 * @param[in] server_s The string name of the service
2124 * @param[in] time_offset The offset to the KDCs time in seconds (optional)
2125 * @param[in] cc The krb5 credential cache string name (optional)
2126 * @param[in] impersonate_princ_s The string principal name to impersonate (optional)
2127 * @param[out] creds_p The returned krb5_creds structure
2128 * @return krb5_error_code
2131 krb5_error_code smb_krb5_get_creds(const char *server_s,
2134 const char *impersonate_princ_s,
2135 krb5_creds **creds_p)
2137 krb5_error_code ret;
2138 krb5_context context = NULL;
2139 krb5_principal me = NULL;
2140 krb5_principal server = NULL;
2141 krb5_principal impersonate_princ = NULL;
2142 krb5_creds *creds = NULL;
2143 krb5_ccache ccache = NULL;
2147 initialize_krb5_error_table();
2148 ret = krb5_init_context(&context);
2153 if (time_offset != 0) {
2154 krb5_set_real_time(context, time(NULL) + time_offset, 0);
2157 ret = krb5_cc_resolve(context, cc ? cc :
2158 krb5_cc_default_name(context), &ccache);
2163 ret = krb5_cc_get_principal(context, ccache, &me);
2168 ret = smb_krb5_parse_name(context, server_s, &server);
2173 if (impersonate_princ_s) {
2174 ret = smb_krb5_parse_name(context, impersonate_princ_s,
2175 &impersonate_princ);
2181 ret = smb_krb5_get_credentials(context, ccache,
2182 me, server, impersonate_princ,
2188 ret = krb5_cc_store_cred(context, ccache, creds);
2197 DEBUG(1,("smb_krb5_get_creds: got ticket for %s\n",
2200 if (impersonate_princ_s) {
2201 char *client = NULL;
2203 ret = smb_krb5_unparse_name(talloc_tos(), context, creds->client, &client);
2207 DEBUGADD(1,("smb_krb5_get_creds: using S4U2SELF impersonation as %s\n",
2209 TALLOC_FREE(client);
2218 krb5_free_creds(context, creds);
2221 krb5_free_principal(context, server);
2224 krb5_free_principal(context, me);
2226 if (impersonate_princ) {
2227 krb5_free_principal(context, impersonate_princ);
2230 krb5_cc_close(context, ccache);
2232 krb5_free_context(context);
2238 * smb_krb5_principal_get_realm
2240 * @brief Get realm of a principal
2242 * @param[in] context The krb5_context
2243 * @param[in] principal The principal
2244 * @return pointer to the realm
2248 char *smb_krb5_principal_get_realm(krb5_context context,
2249 krb5_principal principal)
2251 #ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
2252 return krb5_principal_get_realm(context, principal);
2253 #elif defined(krb5_princ_realm) /* MIT */
2255 realm = krb5_princ_realm(context, principal);
2256 return (char *)realm->data;
2262 #else /* HAVE_KRB5 */
2263 /* this saves a few linking headaches */
2264 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
2265 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
2266 const char *ccname, time_t *tgs_expire,
2267 const char *impersonate_princ_s)
2269 DEBUG(0,("NO KERBEROS SUPPORT\n"));