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/>.
28 #define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
29 #define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
30 #define GSSAPI_CHECKSUM_SIZE (12+GSSAPI_BNDLENGTH)
32 #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)
33 static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
34 krb5_auth_context *auth_context,
37 krb5_data *authenticator);
40 /**************************************************************
41 Wrappers around kerberos string functions that convert from
42 utf8 -> unix charset and vica versa.
43 **************************************************************/
45 /**************************************************************
46 krb5_parse_name that takes a UNIX charset.
47 **************************************************************/
49 krb5_error_code smb_krb5_parse_name(krb5_context context,
50 const char *name, /* in unix charset */
51 krb5_principal *principal)
55 size_t converted_size;
57 if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
61 ret = krb5_parse_name(context, utf8_name, principal);
62 TALLOC_FREE(utf8_name);
66 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
67 /**************************************************************
68 krb5_parse_name_norealm that takes a UNIX charset.
69 **************************************************************/
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)
77 size_t converted_size;
80 if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
84 ret = krb5_parse_name_norealm(context, utf8_name, principal);
85 TALLOC_FREE(utf8_name);
90 /**************************************************************
91 krb5_parse_name that returns a UNIX charset name. Must
92 be freed with talloc_free() call.
93 **************************************************************/
95 krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
97 krb5_const_principal principal,
102 size_t converted_size;
105 ret = krb5_unparse_name(context, principal, &utf8_name);
110 if (!pull_utf8_talloc(mem_ctx, unix_name, utf8_name, &converted_size)) {
111 krb5_free_unparsed_name(context, utf8_name);
114 krb5_free_unparsed_name(context, utf8_name);
118 #ifndef HAVE_KRB5_SET_REAL_TIME
120 * This function is not in the Heimdal mainline.
122 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
127 ret = krb5_us_timeofday(context, &sec, &usec);
131 context->kdc_sec_offset = seconds - sec;
132 context->kdc_usec_offset = microseconds - usec;
138 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
140 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
142 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
143 * to krb5_set_default_tgs_ktypes. See
144 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
146 * If the MIT libraries are not exporting internal symbols, we will end up in
147 * this branch, which is correct. Otherwise we will continue to use the
150 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
152 return krb5_set_default_tgs_enctypes(ctx, enc);
155 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
158 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
160 return krb5_set_default_in_tkt_etypes(ctx, enc);
163 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
165 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
167 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
169 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
171 memset(pkaddr, '\0', sizeof(krb5_address));
172 #if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
173 if (paddr->ss_family == AF_INET6) {
174 pkaddr->addr_type = KRB5_ADDRESS_INET6;
175 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
176 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
180 if (paddr->ss_family == AF_INET) {
181 pkaddr->addr_type = KRB5_ADDRESS_INET;
182 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
183 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
188 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
190 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
192 memset(pkaddr, '\0', sizeof(krb5_address));
193 #if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
194 if (paddr->ss_family == AF_INET6) {
195 pkaddr->addrtype = ADDRTYPE_INET6;
196 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
197 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
201 if (paddr->ss_family == AF_INET) {
202 pkaddr->addrtype = ADDRTYPE_INET;
203 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
204 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
210 #error UNKNOWN_ADDRTYPE
213 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
214 static int create_kerberos_key_from_string_direct(krb5_context context,
215 krb5_principal host_princ,
218 krb5_enctype enctype)
222 krb5_encrypt_block eblock;
224 ret = krb5_principal2salt(context, host_princ, &salt);
226 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
229 krb5_use_enctype(context, &eblock, enctype);
230 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
231 SAFE_FREE(salt.data);
235 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
236 static int create_kerberos_key_from_string_direct(krb5_context context,
237 krb5_principal host_princ,
240 krb5_enctype enctype)
245 ret = krb5_get_pw_salt(context, host_princ, &salt);
247 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
251 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
252 krb5_free_salt(context, salt);
257 #error UNKNOWN_CREATE_KEY_FUNCTIONS
260 int create_kerberos_key_from_string(krb5_context context,
261 krb5_principal host_princ,
264 krb5_enctype enctype,
267 krb5_principal salt_princ = NULL;
270 * Check if we've determined that the KDC is salting keys for this
271 * principal/enctype in a non-obvious way. If it is, try to match
275 KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
276 if (!KRB5_KEY_DATA(key)) {
279 memcpy(KRB5_KEY_DATA(key), password->data, password->length);
280 KRB5_KEY_LENGTH(key) = password->length;
281 KRB5_KEY_TYPE(key) = enctype;
284 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
285 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
287 krb5_free_principal(context, salt_princ);
292 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
293 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
294 krb5_enctype **enctypes)
296 return krb5_get_permitted_enctypes(context, enctypes);
298 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
299 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
300 krb5_enctype **enctypes)
302 return krb5_get_default_in_tkt_etypes(context, enctypes);
305 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
308 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
309 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
310 krb5_auth_context auth_context,
311 krb5_keyblock *keyblock)
313 return krb5_auth_con_setkey(context, auth_context, keyblock);
317 bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
319 DATA_BLOB *edata_out)
321 DATA_BLOB edata_contents;
325 if (!edata->length) {
329 data = asn1_init(mem_ctx);
334 asn1_load(data, *edata);
335 asn1_start_tag(data, ASN1_SEQUENCE(0));
336 asn1_start_tag(data, ASN1_CONTEXT(1));
337 asn1_read_Integer(data, &edata_type);
339 if (edata_type != KRB5_PADATA_PW_SALT) {
340 DEBUG(0,("edata is not of required type %d but of type %d\n",
341 KRB5_PADATA_PW_SALT, edata_type));
346 asn1_start_tag(data, ASN1_CONTEXT(2));
347 asn1_read_OctetString(data, talloc_autofree_context(), &edata_contents);
353 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
355 data_blob_free(&edata_contents);
361 bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
363 DATA_BLOB pac_contents;
367 if (!auth_data->length) {
371 data = asn1_init(mem_ctx);
376 asn1_load(data, *auth_data);
377 asn1_start_tag(data, ASN1_SEQUENCE(0));
378 asn1_start_tag(data, ASN1_SEQUENCE(0));
379 asn1_start_tag(data, ASN1_CONTEXT(0));
380 asn1_read_Integer(data, &data_type);
382 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
383 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
389 asn1_start_tag(data, ASN1_CONTEXT(1));
390 asn1_read_OctetString(data, talloc_autofree_context(), &pac_contents);
396 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
398 data_blob_free(&pac_contents);
403 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
405 DATA_BLOB auth_data_wrapped;
406 bool got_auth_data_pac = False;
409 #if defined(HAVE_KRB5_TKT_ENC_PART2)
410 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
411 tkt->enc_part2->authorization_data[0] &&
412 tkt->enc_part2->authorization_data[0]->length)
414 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
416 if (tkt->enc_part2->authorization_data[i]->ad_type !=
417 KRB5_AUTHDATA_IF_RELEVANT) {
418 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
419 tkt->enc_part2->authorization_data[i]->ad_type));
423 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
424 tkt->enc_part2->authorization_data[i]->length);
426 /* check if it is a PAC */
427 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
428 data_blob_free(&auth_data_wrapped);
430 if (got_auth_data_pac) {
435 return got_auth_data_pac;
439 if (tkt->ticket.authorization_data &&
440 tkt->ticket.authorization_data->len)
442 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
444 if (tkt->ticket.authorization_data->val[i].ad_type !=
445 KRB5_AUTHDATA_IF_RELEVANT) {
446 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
447 tkt->ticket.authorization_data->val[i].ad_type));
451 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
452 tkt->ticket.authorization_data->val[i].ad_data.length);
454 /* check if it is a PAC */
455 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
456 data_blob_free(&auth_data_wrapped);
458 if (got_auth_data_pac) {
463 return got_auth_data_pac;
469 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
471 #if defined(HAVE_KRB5_TKT_ENC_PART2)
472 return tkt->enc_part2->client;
478 #if !defined(HAVE_KRB5_LOCATE_KDC)
480 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
481 * to a public interface for this functionality, so we have to be able to live
482 * without it if the MIT libraries are hiding their internal symbols.
485 #if defined(KRB5_KRBHST_INIT)
487 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
489 krb5_krbhst_handle hnd;
490 krb5_krbhst_info *hinfo;
499 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
501 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
505 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
508 krb5_krbhst_reset(ctx, hnd);
511 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
512 krb5_krbhst_free(ctx, hnd);
516 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
518 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
519 krb5_krbhst_free(ctx, hnd);
524 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
526 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
528 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
529 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
531 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
535 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
536 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
539 krb5_krbhst_free(ctx, hnd);
546 #else /* ! defined(KRB5_KRBHST_INIT) */
548 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
549 struct sockaddr **addr_pp, int *naddrs, int get_masters)
551 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
552 return KRB5_KDC_UNREACH;
555 #endif /* KRB5_KRBHST_INIT */
557 #else /* ! HAVE_KRB5_LOCATE_KDC */
559 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
560 struct sockaddr **addr_pp, int *naddrs, int get_masters)
562 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
565 #endif /* HAVE_KRB5_LOCATE_KDC */
567 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
568 void krb5_free_unparsed_name(krb5_context context, char *val)
574 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
576 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
578 krb5_free_data_contents(context, pdata);
581 SAFE_FREE(pdata->data);
585 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
587 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
588 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
589 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
590 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
592 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
596 bool kerberos_compatible_enctypes(krb5_context context,
597 krb5_enctype enctype1,
598 krb5_enctype enctype2)
600 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
601 krb5_boolean similar = 0;
603 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
604 return similar ? True : False;
605 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
606 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
610 static bool ads_cleanup_expired_creds(krb5_context context,
614 krb5_error_code retval;
615 const char *cc_type = krb5_cc_get_type(context, ccache);
617 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
618 cc_type, krb5_cc_get_name(context, ccache),
619 http_timestring(talloc_tos(), credsp->times.endtime)));
621 /* we will probably need new tickets if the current ones
622 will expire within 10 seconds.
624 if (credsp->times.endtime >= (time(NULL) + 10))
627 /* heimdal won't remove creds from a file ccache, and
628 perhaps we shouldn't anyway, since internally we
629 use memory ccaches, and a FILE one probably means that
630 we're using creds obtained outside of our exectuable
632 if (strequal(cc_type, "FILE")) {
633 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
637 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
639 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
640 error_message(retval)));
641 /* If we have an error in this, we want to display it,
642 but continue as though we deleted it */
648 we can't use krb5_mk_req because w2k wants the service to be in a particular format
650 static krb5_error_code ads_krb5_mk_req(krb5_context context,
651 krb5_auth_context *auth_context,
652 const krb5_flags ap_req_options,
653 const char *principal,
657 const char *impersonate_princ_s)
659 krb5_error_code retval;
660 krb5_principal server;
661 krb5_principal impersonate_princ = NULL;
665 bool creds_ready = False;
666 int i = 0, maxtries = 3;
668 ZERO_STRUCT(in_data);
670 retval = smb_krb5_parse_name(context, principal, &server);
672 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
676 if (impersonate_princ_s) {
677 retval = smb_krb5_parse_name(context, impersonate_princ_s,
680 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", impersonate_princ_s));
685 /* obtain ticket & session key */
687 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
688 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
689 error_message(retval)));
693 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
694 /* This can commonly fail on smbd startup with no ticket in the cache.
695 * Report at higher level than 1. */
696 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
697 error_message(retval)));
701 while (!creds_ready && (i < maxtries)) {
703 if ((retval = smb_krb5_get_credentials(context, ccache,
708 DEBUG(1,("ads_krb5_mk_req: smb_krb5_get_credentials failed for %s (%s)\n",
709 principal, error_message(retval)));
713 /* cope with ticket being in the future due to clock skew */
714 if ((unsigned)credsp->times.starttime > time(NULL)) {
715 time_t t = time(NULL);
716 int time_offset =(int)((unsigned)credsp->times.starttime-t);
717 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
718 krb5_set_real_time(context, t + time_offset + 1, 0);
721 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
728 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
729 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
730 http_timestring(talloc_tos(), (unsigned)credsp->times.endtime),
731 (unsigned)credsp->times.endtime));
734 *expire_time = (time_t)credsp->times.endtime;
737 #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)
738 if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
739 /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
740 as part of the kerberos exchange. */
742 DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
744 if( *auth_context == NULL ) {
745 /* Allocate if it has not yet been allocated. */
746 retval = krb5_auth_con_init( context, auth_context );
748 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_init failed (%s)\n",
749 error_message(retval)));
754 retval = krb5_auth_con_setuseruserkey( context, *auth_context, &credsp->keyblock );
756 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setuseruserkey failed (%s)\n",
757 error_message(retval)));
761 /* Must use a subkey for forwarded tickets. */
762 retval = krb5_auth_con_setflags( context, *auth_context, KRB5_AUTH_CONTEXT_USE_SUBKEY);
764 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setflags failed (%s)\n",
765 error_message(retval)));
769 retval = ads_krb5_get_fwd_ticket( context,
775 DEBUG( 3, ("ads_krb5_get_fwd_ticket failed (%s)\n",
776 error_message( retval ) ) );
779 * This is not fatal. Delete the *auth_context and continue
780 * with krb5_mk_req_extended to get a non-forwardable ticket.
784 free( in_data.data );
788 krb5_auth_con_free(context, *auth_context);
789 *auth_context = NULL;
794 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
795 &in_data, credsp, outbuf);
797 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
798 error_message(retval)));
802 free( in_data.data );
806 krb5_free_creds(context, credsp);
809 krb5_free_cred_contents(context, &creds);
812 krb5_free_principal(context, server);
813 if (impersonate_princ) {
814 krb5_free_principal(context, impersonate_princ);
821 get a kerberos5 ticket for the given service
823 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
824 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
825 uint32 extra_ap_opts, const char *ccname,
827 const char *impersonate_princ_s)
830 krb5_error_code retval;
832 krb5_context context = NULL;
833 krb5_ccache ccdef = NULL;
834 krb5_auth_context auth_context = NULL;
835 krb5_enctype enc_types[] = {
836 #ifdef ENCTYPE_ARCFOUR_HMAC
837 ENCTYPE_ARCFOUR_HMAC,
843 initialize_krb5_error_table();
844 retval = krb5_init_context(&context);
846 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
847 error_message(retval)));
851 if (time_offset != 0) {
852 krb5_set_real_time(context, time(NULL) + time_offset, 0);
855 if ((retval = krb5_cc_resolve(context, ccname ?
856 ccname : krb5_cc_default_name(context), &ccdef))) {
857 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
858 error_message(retval)));
862 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
863 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
864 error_message(retval)));
868 if ((retval = ads_krb5_mk_req(context,
870 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
874 impersonate_princ_s))) {
878 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
880 *ticket = data_blob(packet.data, packet.length);
882 kerberos_free_data_contents(context, &packet);
888 krb5_cc_close(context, ccdef);
890 krb5_auth_con_free(context, auth_context);
891 krb5_free_context(context);
897 bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
899 krb5_keyblock *skey = NULL;
900 krb5_error_code err = 0;
904 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
906 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
909 if (err || skey == NULL) {
910 DEBUG(10, ("KRB5 error getting session key %d\n", err));
914 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
915 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
916 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
922 krb5_free_keyblock(context, skey);
929 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
930 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
932 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
934 static krb5_data kdata;
936 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
937 kdata.length = strlen((const char *)kdata.data);
942 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
944 /* Try krb5_free_keytab_entry_contents first, since
945 * MIT Kerberos >= 1.7 has both krb5_free_keytab_entry_contents and
946 * krb5_kt_free_entry but only has a prototype for the first, while the
947 * second is considered private.
949 #if defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
950 return krb5_free_keytab_entry_contents(context, kt_entry);
951 #elif defined(HAVE_KRB5_KT_FREE_ENTRY)
952 return krb5_kt_free_entry(context, kt_entry);
954 #error UNKNOWN_KT_FREE_FUNCTION
958 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
959 struct PAC_SIGNATURE_DATA *sig)
961 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
962 cksum->cksumtype = (krb5_cksumtype)sig->type;
963 cksum->checksum.length = sig->signature.length;
964 cksum->checksum.data = sig->signature.data;
966 cksum->checksum_type = (krb5_cksumtype)sig->type;
967 cksum->length = sig->signature.length;
968 cksum->contents = sig->signature.data;
972 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
973 const krb5_keyblock *keyblock,
975 krb5_checksum *cksum,
981 /* verify the checksum */
983 /* welcome to the wonderful world of samba's kerberos abstraction layer:
985 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
986 * -----------------------------------------------------------------------------
987 * krb5_c_verify_checksum - works works
988 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
991 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
993 krb5_boolean checksum_valid = False;
996 input.data = (char *)data;
997 input.length = length;
999 ret = krb5_c_verify_checksum(context,
1006 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
1007 error_message(ret)));
1011 if (!checksum_valid)
1012 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1015 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
1017 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
1018 * without enctype and it ignores any key_usage types - Guenther */
1023 ret = krb5_crypto_init(context,
1028 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
1029 error_message(ret)));
1033 ret = krb5_verify_checksum(context,
1040 krb5_crypto_destroy(context, crypto);
1044 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
1050 time_t get_authtime_from_tkt(krb5_ticket *tkt)
1052 #if defined(HAVE_KRB5_TKT_ENC_PART2)
1053 return tkt->enc_part2->times.authtime;
1055 return tkt->ticket.authtime;
1059 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1060 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
1062 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
1063 if (ap_req->ticket->enc_part.kvno)
1064 return ap_req->ticket->enc_part.kvno;
1066 if (ap_req->ticket.enc_part.kvno)
1067 return *ap_req->ticket.enc_part.kvno;
1072 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
1074 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
1075 return ap_req->ticket.enc_part.etype;
1077 return ap_req->ticket->enc_part.enctype;
1080 #endif /* HAVE_KRB5_DECODE_AP_REQ */
1082 static krb5_error_code
1083 get_key_from_keytab(krb5_context context,
1084 krb5_const_principal server,
1085 krb5_enctype enctype,
1087 krb5_keyblock **out_key)
1089 krb5_keytab_entry entry;
1090 krb5_error_code ret;
1093 krb5_keyblock *keyp;
1095 /* We have to open a new keytab handle here, as MIT does
1096 an implicit open/getnext/close on krb5_kt_get_entry. We
1097 may be in the middle of a keytab enumeration when this is
1100 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
1102 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
1106 if ( DEBUGLEVEL >= 10 ) {
1107 if (smb_krb5_unparse_name(talloc_tos(), context, server, &name) == 0) {
1108 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
1109 kvno, enctype, name));
1114 ret = krb5_kt_get_entry(context,
1122 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1126 keyp = KRB5_KT_KEY(&entry);
1128 ret = krb5_copy_keyblock(context, keyp, out_key);
1130 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1134 smb_krb5_kt_free_entry(context, &entry);
1137 krb5_kt_close(context, keytab);
1143 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1144 const krb5_data *inbuf,
1146 krb5_enctype *enctype)
1148 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1150 krb5_error_code ret;
1153 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1157 *kvno = get_kvno_from_ap_req(&ap_req);
1158 *enctype = get_enctype_from_ap_req(&ap_req);
1160 free_AP_REQ(&ap_req);
1165 /* Possibly not an appropriate error code. */
1166 return KRB5KDC_ERR_BADOPTION;
1169 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1170 krb5_auth_context *auth_context,
1171 const krb5_data *inbuf,
1172 krb5_const_principal server,
1174 krb5_flags *ap_req_options,
1175 krb5_ticket **ticket,
1176 krb5_keyblock **keyblock)
1178 krb5_error_code ret;
1180 krb5_enctype enctype;
1181 krb5_keyblock *local_keyblock;
1183 ret = krb5_rd_req(context,
1194 #ifdef KRB5_TICKET_HAS_KEYINFO
1195 enctype = (*ticket)->enc_part.enctype;
1196 kvno = (*ticket)->enc_part.kvno;
1198 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1204 ret = get_key_from_keytab(context,
1210 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1215 if (ret && local_keyblock != NULL) {
1216 krb5_free_keyblock(context, local_keyblock);
1218 *keyblock = local_keyblock;
1224 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1226 krb5_principal *principal)
1228 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1229 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1232 /* we are cheating here because parse_name will in fact set the realm.
1233 * We don't care as the only caller of smb_krb5_parse_name_norealm
1234 * ignores the realm anyway when calling
1235 * smb_krb5_principal_compare_any_realm later - Guenther */
1237 return smb_krb5_parse_name(context, name, principal);
1240 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1241 krb5_const_principal princ1,
1242 krb5_const_principal princ2)
1244 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1246 return krb5_principal_compare_any_realm(context, princ1, princ2);
1248 /* krb5_princ_size is a macro in MIT */
1249 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1252 const krb5_data *p1, *p2;
1254 len1 = krb5_princ_size(context, princ1);
1255 len2 = krb5_princ_size(context, princ2);
1260 for (i = 0; i < len1; i++) {
1262 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1263 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1265 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1271 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1275 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1276 const char *client_string, /* gd@BER.SUSE.DE */
1277 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1278 time_t *expire_time)
1280 krb5_error_code ret;
1281 krb5_context context = NULL;
1282 krb5_ccache ccache = NULL;
1283 krb5_principal client = NULL;
1284 krb5_creds creds, creds_in, *creds_out = NULL;
1287 ZERO_STRUCT(creds_in);
1289 initialize_krb5_error_table();
1290 ret = krb5_init_context(&context);
1295 if (!ccache_string) {
1296 ccache_string = krb5_cc_default_name(context);
1299 if (!ccache_string) {
1304 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1306 /* FIXME: we should not fall back to defaults */
1307 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1312 if (client_string) {
1313 ret = smb_krb5_parse_name(context, client_string, &client);
1318 ret = krb5_cc_get_principal(context, ccache, &client);
1324 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1326 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1328 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1332 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1334 krb5_kdc_flags flags;
1335 krb5_realm *client_realm = NULL;
1337 ret = krb5_copy_principal(context, client, &creds_in.client);
1342 if (service_string) {
1343 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1348 /* build tgt service by default */
1349 client_realm = krb5_princ_realm(context, creds_in.client);
1350 if (!client_realm) {
1354 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1361 flags.b.renewable = flags.b.renew = True;
1363 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1365 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1372 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1375 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1376 ret = krb5_cc_initialize(context, ccache, client);
1381 ret = krb5_cc_store_cred(context, ccache, &creds);
1384 *expire_time = (time_t) creds.times.endtime;
1388 krb5_free_cred_contents(context, &creds_in);
1391 krb5_free_creds(context, creds_out);
1393 krb5_free_cred_contents(context, &creds);
1397 krb5_free_principal(context, client);
1400 krb5_cc_close(context, ccache);
1403 krb5_free_context(context);
1409 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1411 krb5_error_code ret = 0;
1415 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1416 krb5_free_addresses(context, addr->addrs);
1417 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1418 ret = krb5_free_addresses(context, addr->addrs);
1419 SAFE_FREE(addr->addrs);
1426 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1428 krb5_error_code ret = 0;
1430 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1431 krb5_address **addrs = NULL;
1432 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1433 krb5_addresses *addrs = NULL;
1436 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1437 if (*kerb_addr == NULL) {
1441 put_name(buf, global_myname(), ' ', 0x20);
1443 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1447 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1448 if (addrs == NULL) {
1449 SAFE_FREE(*kerb_addr);
1453 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1455 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1456 if (addrs[0] == NULL) {
1458 SAFE_FREE(*kerb_addr);
1462 addrs[0]->magic = KV5M_ADDRESS;
1463 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1464 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1465 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1466 if (addrs[0]->contents == NULL) {
1467 SAFE_FREE(addrs[0]);
1469 SAFE_FREE(*kerb_addr);
1473 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1477 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1479 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1480 if (addrs == NULL) {
1481 SAFE_FREE(*kerb_addr);
1485 memset(addrs, 0, sizeof(krb5_addresses));
1488 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1489 if (addrs->val == NULL) {
1491 SAFE_FREE(kerb_addr);
1495 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1496 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1497 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1498 if (addrs->val[0].address.data == NULL) {
1499 SAFE_FREE(addrs->val);
1501 SAFE_FREE(*kerb_addr);
1505 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1508 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1510 (*kerb_addr)->addrs = addrs;
1515 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1517 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1518 krb5_free_error_contents(context, krberror);
1520 krb5_free_error(context, krberror);
1524 krb5_error_code handle_krberror_packet(krb5_context context,
1527 krb5_error_code ret;
1528 bool got_error_code = False;
1530 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1532 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1534 krb5_error krberror;
1536 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1537 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1538 error_message(ret)));
1542 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1543 ret = (krb5_error_code) krberror.error_code;
1544 got_error_code = True;
1547 smb_krb5_free_error(context, &krberror);
1551 krb5_error *krberror;
1553 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1554 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1555 error_message(ret)));
1559 if (krberror->e_data.data == NULL) {
1560 #if defined(ERROR_TABLE_BASE_krb5)
1561 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1563 ret = (krb5_error_code)krberror->error;
1565 got_error_code = True;
1567 smb_krb5_free_error(context, krberror);
1570 if (got_error_code) {
1571 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1572 error_message(ret), ret));
1577 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1578 krb5_get_init_creds_opt **opt)
1580 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1581 /* Heimdal or modern MIT version */
1582 return krb5_get_init_creds_opt_alloc(context, opt);
1584 /* Historical MIT version */
1585 krb5_get_init_creds_opt *my_opt;
1589 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1593 krb5_get_init_creds_opt_init(my_opt);
1597 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1600 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1601 krb5_get_init_creds_opt *opt)
1603 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1605 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1606 /* Modern MIT or Heimdal version */
1607 krb5_get_init_creds_opt_free(context, opt);
1609 /* Heimdal version */
1610 krb5_get_init_creds_opt_free(opt);
1611 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1613 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1614 /* Historical MIT version */
1617 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1620 krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry)
1622 return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
1626 /* caller needs to free etype_s */
1627 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1628 krb5_enctype enctype,
1631 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1632 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1633 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1635 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1639 *etype_s = SMB_STRDUP(buf);
1645 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1649 krb5_error_code smb_krb5_mk_error(krb5_context context,
1650 krb5_error_code error_code,
1651 const krb5_principal server,
1654 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1656 * The MIT interface is *terrible*.
1657 * We have to construct this ourselves...
1661 memset(&e, 0, sizeof(e));
1662 krb5_us_timeofday(context, &e.stime, &e.susec);
1664 #if defined(krb5_err_base)
1665 e.error = error_code - krb5_err_base;
1666 #elif defined(ERROR_TABLE_BASE_krb5)
1667 e.error = error_code - ERROR_TABLE_BASE_krb5;
1669 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1672 return krb5_mk_error(context, &e, reply);
1673 #else /* Heimdal. */
1674 return krb5_mk_error(context,
1686 /**********************************************************************
1687 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1688 * allows to process non-default keytab names.
1689 * @param context krb5_context
1690 * @param keytab_name_req string
1691 * @param write_access bool if writable keytab is required
1692 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1693 * @return krb5_error_code
1694 **********************************************************************/
1696 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1697 #ifndef MAX_KEYTAB_NAME_LEN
1698 #define MAX_KEYTAB_NAME_LEN 1100
1701 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1702 const char *keytab_name_req,
1704 krb5_keytab *keytab)
1706 krb5_error_code ret = 0;
1707 TALLOC_CTX *mem_ctx;
1708 char keytab_string[MAX_KEYTAB_NAME_LEN];
1709 char *kt_str = NULL;
1710 bool found_valid_name = False;
1711 const char *pragma = "FILE";
1712 const char *tmp = NULL;
1714 if (!write_access && !keytab_name_req) {
1715 /* caller just wants to read the default keytab readonly, so be it */
1716 return krb5_kt_default(context, keytab);
1719 mem_ctx = talloc_init("smb_krb5_open_keytab");
1724 #ifdef HAVE_WRFILE_KEYTAB
1730 if (keytab_name_req) {
1732 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1733 ret = KRB5_CONFIG_NOTENUFSPACE;
1737 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1738 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1739 tmp = keytab_name_req;
1743 if (keytab_name_req[0] != '/') {
1744 ret = KRB5_KT_BADNAME;
1748 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1757 /* we need to handle more complex keytab_strings, like:
1758 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1760 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1765 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1767 tmp = talloc_strdup(mem_ctx, keytab_string);
1773 if (strncmp(tmp, "ANY:", 4) == 0) {
1777 memset(&keytab_string, '\0', sizeof(keytab_string));
1779 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1780 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1781 found_valid_name = True;
1786 if (strncmp(kt_str, "FILE:", 5) == 0) {
1787 found_valid_name = True;
1792 if (tmp[0] == '/') {
1793 /* Treat as a FILE: keytab definition. */
1794 found_valid_name = true;
1797 if (found_valid_name) {
1798 if (tmp[0] != '/') {
1799 ret = KRB5_KT_BADNAME;
1803 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1812 if (!found_valid_name) {
1813 ret = KRB5_KT_UNKNOWN_TYPE;
1818 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1819 ret = krb5_kt_resolve(context, tmp, keytab);
1822 TALLOC_FREE(mem_ctx);
1826 krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
1827 krb5_context context,
1829 const char **keytab_name)
1831 char keytab_string[MAX_KEYTAB_NAME_LEN];
1832 krb5_error_code ret = 0;
1834 ret = krb5_kt_get_name(context, keytab,
1835 keytab_string, MAX_KEYTAB_NAME_LEN - 2);
1840 *keytab_name = talloc_strdup(mem_ctx, keytab_string);
1841 if (!*keytab_name) {
1848 #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)
1849 /**************************************************************
1850 Routine: ads_krb5_get_fwd_ticket
1852 When a service ticket is flagged as trusted
1853 for delegation we should provide a forwardable
1854 ticket so that the remote host can act on our
1855 behalf. This is done by taking the 2nd forwardable
1856 TGT and storing it in the GSS-API authenticator
1857 "checksum". This routine will populate
1858 the krb5_data authenticator with this TGT.
1860 krb5_context context: The kerberos context for this authentication.
1861 krb5_auth_context: The authentication context.
1862 krb5_creds *credsp: The ticket credentials (AS-REP).
1863 krb5_ccache ccache: The credentials cache.
1864 krb5_data &authenticator: The checksum field that will store the TGT, and
1865 authenticator.data must be freed by the caller.
1868 krb5_error_code: 0 if no errors, otherwise set.
1869 **************************************************************/
1871 static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
1872 krb5_auth_context *auth_context,
1875 krb5_data *authenticator)
1878 krb5_error_code retval = 0;
1879 char *pChksum = NULL;
1882 /* MIT krb5 1.7beta3 (in Ubuntu Karmic) is missing the prototype,
1883 but still has the symbol */
1884 #if !HAVE_DECL_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE
1885 krb5_error_code krb5_auth_con_set_req_cksumtype(
1886 krb5_context context,
1887 krb5_auth_context auth_context,
1888 krb5_cksumtype cksumtype);
1891 ZERO_STRUCT(fwdData);
1892 ZERO_STRUCTP(authenticator);
1894 retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
1895 *auth_context, /* Authentication context [in] */
1896 CONST_DISCARD(char *, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
1897 credsp->client, /* Client principal for the tgt [in] */
1898 credsp->server, /* Server principal for the tgt [in] */
1899 ccache, /* Credential cache to use for storage [in] */
1900 1, /* Turn on for "Forwardable ticket" [in] */
1901 &fwdData ); /* Resulting response [out] */
1905 DEBUG(1,("ads_krb5_get_fwd_ticket: krb5_fwd_tgt_creds failed (%s)\n",
1906 error_message(retval)));
1910 if ((unsigned int)GSSAPI_CHECKSUM_SIZE + (unsigned int)fwdData.length <
1911 (unsigned int)GSSAPI_CHECKSUM_SIZE) {
1916 /* We're going to allocate a gssChecksum structure with a little
1917 extra data the length of the kerberos credentials length
1918 (APPLICATION 22) so that we can pack it on the end of the structure.
1921 pChksum = (char *)SMB_MALLOC(GSSAPI_CHECKSUM_SIZE + fwdData.length );
1929 SIVAL(p, 0, GSSAPI_BNDLENGTH);
1932 /* Zero out the bindings fields */
1933 memset(p, '\0', GSSAPI_BNDLENGTH );
1934 p += GSSAPI_BNDLENGTH;
1936 SIVAL(p, 0, GSS_C_DELEG_FLAG );
1940 SSVAL(p, 0, fwdData.length );
1943 /* Migrate the kerberos KRB_CRED data to the checksum delegation */
1944 memcpy(p, fwdData.data, fwdData.length );
1945 p += fwdData.length;
1947 /* We need to do this in order to allow our GSS-API */
1948 retval = krb5_auth_con_set_req_cksumtype( context, *auth_context, GSSAPI_CHECKSUM );
1953 /* We now have a service ticket, now turn it into an AP-REQ. */
1954 authenticator->length = fwdData.length + GSSAPI_CHECKSUM_SIZE;
1956 /* Caller should call free() when they're done with this. */
1957 authenticator->data = (char *)pChksum;
1961 /* Remove that input data, we never needed it anyway. */
1962 if (fwdData.length > 0) {
1963 krb5_free_data_contents( context, &fwdData );
1970 #if defined(HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE) && \
1971 defined(HAVE_KRB5_GET_CREDS_OPT_ALLOC) && \
1972 defined(HAVE_KRB5_GET_CREDS)
1973 static krb5_error_code smb_krb5_get_credentials_for_user_opt(krb5_context context,
1976 krb5_principal server,
1977 krb5_principal impersonate_princ,
1978 krb5_creds **out_creds)
1980 krb5_error_code ret;
1981 krb5_get_creds_opt opt;
1983 ret = krb5_get_creds_opt_alloc(context, &opt);
1987 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
1989 if (impersonate_princ) {
1990 ret = krb5_get_creds_opt_set_impersonate(context, opt,
1997 ret = krb5_get_creds(context, opt, ccache, server, out_creds);
2004 krb5_get_creds_opt_free(context, opt);
2008 #endif /* HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE */
2010 #ifdef HAVE_KRB5_GET_CREDENTIALS_FOR_USER
2011 static krb5_error_code smb_krb5_get_credentials_for_user(krb5_context context,
2014 krb5_principal server,
2015 krb5_principal impersonate_princ,
2016 krb5_creds **out_creds)
2018 krb5_error_code ret;
2019 krb5_creds in_creds;
2021 #if !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER
2022 krb5_error_code KRB5_CALLCONV
2023 krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
2024 krb5_ccache ccache, krb5_creds *in_creds,
2025 krb5_data *subject_cert,
2026 krb5_creds **out_creds);
2027 #endif /* !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER */
2029 ZERO_STRUCT(in_creds);
2031 if (impersonate_princ) {
2033 in_creds.server = me;
2034 in_creds.client = impersonate_princ;
2036 ret = krb5_get_credentials_for_user(context,
2037 0, /* krb5_flags options */
2040 NULL, /* krb5_data *subject_cert */
2043 in_creds.client = me;
2044 in_creds.server = server;
2046 ret = krb5_get_credentials(context, 0, ccache,
2047 &in_creds, out_creds);
2052 #endif /* HAVE_KRB5_GET_CREDENTIALS_FOR_USER */
2055 * smb_krb5_get_credentials
2057 * @brief Get krb5 credentials for a server
2059 * @param[in] context An initialized krb5_context
2060 * @param[in] ccache An initialized krb5_ccache
2061 * @param[in] me The krb5_principal of the caller
2062 * @param[in] server The krb5_principal of the requested service
2063 * @param[in] impersonate_princ The krb5_principal of a user to impersonate as (optional)
2064 * @param[out] out_creds The returned krb5_creds structure
2065 * @return krb5_error_code
2068 krb5_error_code smb_krb5_get_credentials(krb5_context context,
2071 krb5_principal server,
2072 krb5_principal impersonate_princ,
2073 krb5_creds **out_creds)
2075 krb5_error_code ret;
2076 krb5_creds *creds = NULL;
2080 if (impersonate_princ) {
2081 #ifdef HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE /* Heimdal */
2082 ret = smb_krb5_get_credentials_for_user_opt(context, ccache, me, server, impersonate_princ, &creds);
2083 #elif defined(HAVE_KRB5_GET_CREDENTIALS_FOR_USER) /* MIT */
2084 ret = smb_krb5_get_credentials_for_user(context, ccache, me, server, impersonate_princ, &creds);
2089 krb5_creds in_creds;
2091 ZERO_STRUCT(in_creds);
2093 in_creds.client = me;
2094 in_creds.server = server;
2096 ret = krb5_get_credentials(context, 0, ccache,
2103 ret = krb5_cc_store_cred(context, ccache, creds);
2114 krb5_free_creds(context, creds);
2121 * smb_krb5_get_creds
2123 * @brief Get krb5 credentials for a server
2125 * @param[in] server_s The string name of the service
2126 * @param[in] time_offset The offset to the KDCs time in seconds (optional)
2127 * @param[in] cc The krb5 credential cache string name (optional)
2128 * @param[in] impersonate_princ_s The string principal name to impersonate (optional)
2129 * @param[out] creds_p The returned krb5_creds structure
2130 * @return krb5_error_code
2133 krb5_error_code smb_krb5_get_creds(const char *server_s,
2136 const char *impersonate_princ_s,
2137 krb5_creds **creds_p)
2139 krb5_error_code ret;
2140 krb5_context context = NULL;
2141 krb5_principal me = NULL;
2142 krb5_principal server = NULL;
2143 krb5_principal impersonate_princ = NULL;
2144 krb5_creds *creds = NULL;
2145 krb5_ccache ccache = NULL;
2149 initialize_krb5_error_table();
2150 ret = krb5_init_context(&context);
2155 if (time_offset != 0) {
2156 krb5_set_real_time(context, time(NULL) + time_offset, 0);
2159 ret = krb5_cc_resolve(context, cc ? cc :
2160 krb5_cc_default_name(context), &ccache);
2165 ret = krb5_cc_get_principal(context, ccache, &me);
2170 ret = smb_krb5_parse_name(context, server_s, &server);
2175 if (impersonate_princ_s) {
2176 ret = smb_krb5_parse_name(context, impersonate_princ_s,
2177 &impersonate_princ);
2183 ret = smb_krb5_get_credentials(context, ccache,
2184 me, server, impersonate_princ,
2190 ret = krb5_cc_store_cred(context, ccache, creds);
2199 DEBUG(1,("smb_krb5_get_creds: got ticket for %s\n",
2202 if (impersonate_princ_s) {
2203 char *client = NULL;
2205 ret = smb_krb5_unparse_name(talloc_tos(), context, creds->client, &client);
2209 DEBUGADD(1,("smb_krb5_get_creds: using S4U2SELF impersonation as %s\n",
2211 TALLOC_FREE(client);
2220 krb5_free_creds(context, creds);
2223 krb5_free_principal(context, server);
2226 krb5_free_principal(context, me);
2228 if (impersonate_princ) {
2229 krb5_free_principal(context, impersonate_princ);
2232 krb5_cc_close(context, ccache);
2234 krb5_free_context(context);
2240 * smb_krb5_principal_get_realm
2242 * @brief Get realm of a principal
2244 * @param[in] context The krb5_context
2245 * @param[in] principal The principal
2246 * @return pointer to the realm
2250 char *smb_krb5_principal_get_realm(krb5_context context,
2251 krb5_principal principal)
2253 #ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
2254 return krb5_principal_get_realm(context, principal);
2255 #elif defined(krb5_princ_realm) /* MIT */
2257 realm = krb5_princ_realm(context, principal);
2258 return (char *)realm->data;
2264 #else /* HAVE_KRB5 */
2265 /* this saves a few linking headaches */
2266 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
2267 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
2268 const char *ccname, time_t *tgs_expire,
2269 const char *impersonate_princ_s)
2271 DEBUG(0,("NO KERBEROS SUPPORT\n"));