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 2005-2007
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 #ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE /* Heimdal */
31 #define KRB5_KEY_TYPE(k) ((k)->keytype)
32 #define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
33 #define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
34 #define KRB5_KEY_DATA_CAST void
36 #define KRB5_KEY_TYPE(k) ((k)->enctype)
37 #define KRB5_KEY_LENGTH(k) ((k)->length)
38 #define KRB5_KEY_DATA(k) ((k)->contents)
39 #define KRB5_KEY_DATA_CAST krb5_octet
40 #endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
42 #define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
43 #define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
44 #define GSSAPI_CHECKSUM_SIZE (12+GSSAPI_BNDLENGTH)
46 #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)
47 static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
48 krb5_auth_context *auth_context,
51 krb5_data *authenticator);
54 /**************************************************************
55 Wrappers around kerberos string functions that convert from
56 utf8 -> unix charset and vica versa.
57 **************************************************************/
59 /**************************************************************
60 krb5_parse_name that takes a UNIX charset.
61 **************************************************************/
63 krb5_error_code smb_krb5_parse_name(krb5_context context,
64 const char *name, /* in unix charset */
65 krb5_principal *principal)
69 size_t converted_size;
71 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
75 ret = krb5_parse_name(context, utf8_name, principal);
80 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
81 /**************************************************************
82 krb5_parse_name_norealm that takes a UNIX charset.
83 **************************************************************/
85 static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
86 const char *name, /* in unix charset */
87 krb5_principal *principal)
91 size_t converted_size;
94 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
98 ret = krb5_parse_name_norealm(context, utf8_name, principal);
104 /**************************************************************
105 krb5_parse_name that returns a UNIX charset name. Must
106 be freed with normal free() call.
107 **************************************************************/
109 krb5_error_code smb_krb5_unparse_name(krb5_context context,
110 krb5_const_principal principal,
115 size_t converted_size;
118 ret = krb5_unparse_name(context, principal, &utf8_name);
123 if (!pull_utf8_allocate(unix_name, utf8_name, &converted_size)) {
124 krb5_free_unparsed_name(context, utf8_name);
127 krb5_free_unparsed_name(context, utf8_name);
131 #ifndef HAVE_KRB5_SET_REAL_TIME
133 * This function is not in the Heimdal mainline.
135 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
140 ret = krb5_us_timeofday(context, &sec, &usec);
144 context->kdc_sec_offset = seconds - sec;
145 context->kdc_usec_offset = microseconds - usec;
151 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
153 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
155 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
156 * to krb5_set_default_tgs_ktypes. See
157 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
159 * If the MIT libraries are not exporting internal symbols, we will end up in
160 * this branch, which is correct. Otherwise we will continue to use the
163 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
165 return krb5_set_default_tgs_enctypes(ctx, enc);
168 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
171 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
173 return krb5_set_default_in_tkt_etypes(ctx, enc);
176 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
178 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
180 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
182 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
184 memset(pkaddr, '\0', sizeof(krb5_address));
185 #if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
186 if (paddr->ss_family == AF_INET6) {
187 pkaddr->addr_type = KRB5_ADDRESS_INET6;
188 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
189 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
193 if (paddr->ss_family == AF_INET) {
194 pkaddr->addr_type = KRB5_ADDRESS_INET;
195 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
196 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
201 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
203 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
205 memset(pkaddr, '\0', sizeof(krb5_address));
206 #if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
207 if (paddr->ss_family == AF_INET6) {
208 pkaddr->addrtype = ADDRTYPE_INET6;
209 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
210 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
214 if (paddr->ss_family == AF_INET) {
215 pkaddr->addrtype = ADDRTYPE_INET;
216 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
217 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
223 #error UNKNOWN_ADDRTYPE
226 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
227 static int create_kerberos_key_from_string_direct(krb5_context context,
228 krb5_principal host_princ,
231 krb5_enctype enctype)
235 krb5_encrypt_block eblock;
237 ret = krb5_principal2salt(context, host_princ, &salt);
239 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
242 krb5_use_enctype(context, &eblock, enctype);
243 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
244 SAFE_FREE(salt.data);
248 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
249 static int create_kerberos_key_from_string_direct(krb5_context context,
250 krb5_principal host_princ,
253 krb5_enctype enctype)
258 ret = krb5_get_pw_salt(context, host_princ, &salt);
260 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
264 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
265 krb5_free_salt(context, salt);
270 #error UNKNOWN_CREATE_KEY_FUNCTIONS
273 int create_kerberos_key_from_string(krb5_context context,
274 krb5_principal host_princ,
277 krb5_enctype enctype,
280 krb5_principal salt_princ = NULL;
283 * Check if we've determined that the KDC is salting keys for this
284 * principal/enctype in a non-obvious way. If it is, try to match
288 KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
289 if (!KRB5_KEY_DATA(key)) {
292 memcpy(KRB5_KEY_DATA(key), password->data, password->length);
293 KRB5_KEY_LENGTH(key) = password->length;
294 KRB5_KEY_TYPE(key) = enctype;
297 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
298 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
300 krb5_free_principal(context, salt_princ);
305 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
306 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
307 krb5_enctype **enctypes)
309 return krb5_get_permitted_enctypes(context, enctypes);
311 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
312 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
313 krb5_enctype **enctypes)
315 return krb5_get_default_in_tkt_etypes(context, enctypes);
318 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
321 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
322 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
323 krb5_auth_context auth_context,
324 krb5_keyblock *keyblock)
326 return krb5_auth_con_setkey(context, auth_context, keyblock);
330 bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
332 DATA_BLOB *edata_out)
334 DATA_BLOB edata_contents;
338 if (!edata->length) {
342 asn1_load(&data, *edata);
343 asn1_start_tag(&data, ASN1_SEQUENCE(0));
344 asn1_start_tag(&data, ASN1_CONTEXT(1));
345 asn1_read_Integer(&data, &edata_type);
347 if (edata_type != KRB5_PADATA_PW_SALT) {
348 DEBUG(0,("edata is not of required type %d but of type %d\n",
349 KRB5_PADATA_PW_SALT, edata_type));
354 asn1_start_tag(&data, ASN1_CONTEXT(2));
355 asn1_read_OctetString(&data, &edata_contents);
361 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
363 data_blob_free(&edata_contents);
369 bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
371 DATA_BLOB pac_contents;
375 if (!auth_data->length) {
379 asn1_load(&data, *auth_data);
380 asn1_start_tag(&data, ASN1_SEQUENCE(0));
381 asn1_start_tag(&data, ASN1_SEQUENCE(0));
382 asn1_start_tag(&data, ASN1_CONTEXT(0));
383 asn1_read_Integer(&data, &data_type);
385 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
386 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
392 asn1_start_tag(&data, ASN1_CONTEXT(1));
393 asn1_read_OctetString(&data, &pac_contents);
399 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
401 data_blob_free(&pac_contents);
406 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
408 DATA_BLOB auth_data_wrapped;
409 bool got_auth_data_pac = False;
412 #if defined(HAVE_KRB5_TKT_ENC_PART2)
413 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
414 tkt->enc_part2->authorization_data[0] &&
415 tkt->enc_part2->authorization_data[0]->length)
417 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
419 if (tkt->enc_part2->authorization_data[i]->ad_type !=
420 KRB5_AUTHDATA_IF_RELEVANT) {
421 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
422 tkt->enc_part2->authorization_data[i]->ad_type));
426 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
427 tkt->enc_part2->authorization_data[i]->length);
429 /* check if it is a PAC */
430 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
431 data_blob_free(&auth_data_wrapped);
433 if (got_auth_data_pac) {
438 return got_auth_data_pac;
442 if (tkt->ticket.authorization_data &&
443 tkt->ticket.authorization_data->len)
445 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
447 if (tkt->ticket.authorization_data->val[i].ad_type !=
448 KRB5_AUTHDATA_IF_RELEVANT) {
449 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
450 tkt->ticket.authorization_data->val[i].ad_type));
454 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
455 tkt->ticket.authorization_data->val[i].ad_data.length);
457 /* check if it is a PAC */
458 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
459 data_blob_free(&auth_data_wrapped);
461 if (got_auth_data_pac) {
466 return got_auth_data_pac;
472 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
474 #if defined(HAVE_KRB5_TKT_ENC_PART2)
475 return tkt->enc_part2->client;
481 #if !defined(HAVE_KRB5_LOCATE_KDC)
483 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
484 * to a public interface for this functionality, so we have to be able to live
485 * without it if the MIT libraries are hiding their internal symbols.
488 #if defined(KRB5_KRBHST_INIT)
490 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
492 krb5_krbhst_handle hnd;
493 krb5_krbhst_info *hinfo;
502 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
504 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
508 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
511 krb5_krbhst_reset(ctx, hnd);
514 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
515 krb5_krbhst_free(ctx, hnd);
519 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
521 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
522 krb5_krbhst_free(ctx, hnd);
527 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
529 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
531 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
532 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
534 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
538 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
539 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
542 krb5_krbhst_free(ctx, hnd);
549 #else /* ! defined(KRB5_KRBHST_INIT) */
551 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
552 struct sockaddr **addr_pp, int *naddrs, int get_masters)
554 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
555 return KRB5_KDC_UNREACH;
558 #endif /* KRB5_KRBHST_INIT */
560 #else /* ! HAVE_KRB5_LOCATE_KDC */
562 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
563 struct sockaddr **addr_pp, int *naddrs, int get_masters)
565 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
568 #endif /* HAVE_KRB5_LOCATE_KDC */
570 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
571 void krb5_free_unparsed_name(krb5_context context, char *val)
577 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
579 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
581 krb5_free_data_contents(context, pdata);
584 SAFE_FREE(pdata->data);
588 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
590 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
591 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
592 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
593 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
595 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
599 bool kerberos_compatible_enctypes(krb5_context context,
600 krb5_enctype enctype1,
601 krb5_enctype enctype2)
603 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
604 krb5_boolean similar = 0;
606 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
607 return similar ? True : False;
608 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
609 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
613 static bool ads_cleanup_expired_creds(krb5_context context,
617 krb5_error_code retval;
618 const char *cc_type = krb5_cc_get_type(context, ccache);
620 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
621 cc_type, krb5_cc_get_name(context, ccache),
622 http_timestring(credsp->times.endtime)));
624 /* we will probably need new tickets if the current ones
625 will expire within 10 seconds.
627 if (credsp->times.endtime >= (time(NULL) + 10))
630 /* heimdal won't remove creds from a file ccache, and
631 perhaps we shouldn't anyway, since internally we
632 use memory ccaches, and a FILE one probably means that
633 we're using creds obtained outside of our exectuable
635 if (strequal(cc_type, "FILE")) {
636 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
640 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
642 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
643 error_message(retval)));
644 /* If we have an error in this, we want to display it,
645 but continue as though we deleted it */
651 we can't use krb5_mk_req because w2k wants the service to be in a particular format
653 static krb5_error_code ads_krb5_mk_req(krb5_context context,
654 krb5_auth_context *auth_context,
655 const krb5_flags ap_req_options,
656 const char *principal,
661 krb5_error_code retval;
662 krb5_principal server;
666 bool creds_ready = False;
667 int i = 0, maxtries = 3;
669 ZERO_STRUCT(in_data);
671 retval = smb_krb5_parse_name(context, principal, &server);
673 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
677 /* obtain ticket & session key */
679 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
680 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
681 error_message(retval)));
685 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
686 /* This can commonly fail on smbd startup with no ticket in the cache.
687 * Report at higher level than 1. */
688 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
689 error_message(retval)));
693 while (!creds_ready && (i < maxtries)) {
695 if ((retval = krb5_get_credentials(context, 0, ccache,
697 DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
698 principal, error_message(retval)));
702 /* cope with ticket being in the future due to clock skew */
703 if ((unsigned)credsp->times.starttime > time(NULL)) {
704 time_t t = time(NULL);
705 int time_offset =(int)((unsigned)credsp->times.starttime-t);
706 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
707 krb5_set_real_time(context, t + time_offset + 1, 0);
710 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
717 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
718 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
719 http_timestring((unsigned)credsp->times.endtime),
720 (unsigned)credsp->times.endtime));
723 *expire_time = (time_t)credsp->times.endtime;
726 #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)
727 if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
728 /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
729 as part of the kerberos exchange. */
731 DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
733 if( *auth_context == NULL ) {
734 /* Allocate if it has not yet been allocated. */
735 retval = krb5_auth_con_init( context, auth_context );
737 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_init failed (%s)\n",
738 error_message(retval)));
743 retval = krb5_auth_con_setuseruserkey( context, *auth_context, &credsp->keyblock );
745 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setuseruserkey failed (%s)\n",
746 error_message(retval)));
750 /* Must use a subkey for forwarded tickets. */
751 retval = krb5_auth_con_setflags( context, *auth_context, KRB5_AUTH_CONTEXT_USE_SUBKEY);
753 DEBUG(1,("ads_krb5_mk_req: krb5_auth_con_setflags failed (%s)\n",
754 error_message(retval)));
758 retval = ads_krb5_get_fwd_ticket( context,
764 DEBUG( 1, ("ads_krb5_get_fwd_ticket failed (%s)\n", error_message( retval ) ) );
769 DEBUG( 1, ("krb5_auth_con_set_req_cksumtype failed (%s)\n",
770 error_message( retval ) ) );
777 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
778 &in_data, credsp, outbuf);
780 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
781 error_message(retval)));
785 free( in_data.data );
789 krb5_free_creds(context, credsp);
792 krb5_free_cred_contents(context, &creds);
795 krb5_free_principal(context, server);
801 get a kerberos5 ticket for the given service
803 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
804 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
805 uint32 extra_ap_opts, const char *ccname,
809 krb5_error_code retval;
811 krb5_context context = NULL;
812 krb5_ccache ccdef = NULL;
813 krb5_auth_context auth_context = NULL;
814 krb5_enctype enc_types[] = {
815 #ifdef ENCTYPE_ARCFOUR_HMAC
816 ENCTYPE_ARCFOUR_HMAC,
822 initialize_krb5_error_table();
823 retval = krb5_init_context(&context);
825 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
826 error_message(retval)));
830 if (time_offset != 0) {
831 krb5_set_real_time(context, time(NULL) + time_offset, 0);
834 if ((retval = krb5_cc_resolve(context, ccname ?
835 ccname : krb5_cc_default_name(context), &ccdef))) {
836 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
837 error_message(retval)));
841 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
842 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
843 error_message(retval)));
847 if ((retval = ads_krb5_mk_req(context,
849 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
856 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
858 *ticket = data_blob(packet.data, packet.length);
860 kerberos_free_data_contents(context, &packet);
866 krb5_cc_close(context, ccdef);
868 krb5_auth_con_free(context, auth_context);
869 krb5_free_context(context);
875 bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
882 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
884 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
885 if (err == 0 && skey != NULL) {
886 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
887 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
888 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
892 krb5_free_keyblock(context, skey);
894 DEBUG(10, ("KRB5 error getting session key %d\n", err));
901 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
902 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
904 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
906 static krb5_data kdata;
908 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
909 kdata.length = strlen((const char *)kdata.data);
914 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
916 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
917 return krb5_kt_free_entry(context, kt_entry);
918 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
919 return krb5_free_keytab_entry_contents(context, kt_entry);
921 #error UNKNOWN_KT_FREE_FUNCTION
925 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
926 struct PAC_SIGNATURE_DATA *sig)
928 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
929 cksum->cksumtype = (krb5_cksumtype)sig->type;
930 cksum->checksum.length = sig->signature.length;
931 cksum->checksum.data = sig->signature.data;
933 cksum->checksum_type = (krb5_cksumtype)sig->type;
934 cksum->length = sig->signature.length;
935 cksum->contents = sig->signature.data;
939 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
940 const krb5_keyblock *keyblock,
942 krb5_checksum *cksum,
948 /* verify the checksum */
950 /* welcome to the wonderful world of samba's kerberos abstraction layer:
952 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
953 * -----------------------------------------------------------------------------
954 * krb5_c_verify_checksum - works works
955 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
958 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
960 krb5_boolean checksum_valid = False;
963 input.data = (char *)data;
964 input.length = length;
966 ret = krb5_c_verify_checksum(context,
973 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
974 error_message(ret)));
979 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
982 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
984 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
985 * without enctype and it ignores any key_usage types - Guenther */
990 ret = krb5_crypto_init(context,
995 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
996 error_message(ret)));
1000 ret = krb5_verify_checksum(context,
1007 krb5_crypto_destroy(context, crypto);
1011 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
1017 time_t get_authtime_from_tkt(krb5_ticket *tkt)
1019 #if defined(HAVE_KRB5_TKT_ENC_PART2)
1020 return tkt->enc_part2->times.authtime;
1022 return tkt->ticket.authtime;
1026 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1027 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
1029 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
1030 if (ap_req->ticket->enc_part.kvno)
1031 return ap_req->ticket->enc_part.kvno;
1033 if (ap_req->ticket.enc_part.kvno)
1034 return *ap_req->ticket.enc_part.kvno;
1039 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
1041 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
1042 return ap_req->ticket.enc_part.etype;
1044 return ap_req->ticket->enc_part.enctype;
1047 #endif /* HAVE_KRB5_DECODE_AP_REQ */
1049 static krb5_error_code
1050 get_key_from_keytab(krb5_context context,
1051 krb5_const_principal server,
1052 krb5_enctype enctype,
1054 krb5_keyblock **out_key)
1056 krb5_keytab_entry entry;
1057 krb5_error_code ret;
1061 /* We have to open a new keytab handle here, as MIT does
1062 an implicit open/getnext/close on krb5_kt_get_entry. We
1063 may be in the middle of a keytab enumeration when this is
1066 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
1068 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
1072 if ( DEBUGLEVEL >= 10 ) {
1073 if (smb_krb5_unparse_name(context, server, &name) == 0) {
1074 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
1075 kvno, enctype, name));
1080 ret = krb5_kt_get_entry(context,
1088 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1092 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
1093 ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
1094 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
1095 ret = krb5_copy_keyblock(context, &entry.key, out_key);
1097 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
1101 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1105 smb_krb5_kt_free_entry(context, &entry);
1108 krb5_kt_close(context, keytab);
1114 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1115 const krb5_data *inbuf,
1117 krb5_enctype *enctype)
1119 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1121 krb5_error_code ret;
1124 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1128 *kvno = get_kvno_from_ap_req(&ap_req);
1129 *enctype = get_enctype_from_ap_req(&ap_req);
1131 free_AP_REQ(&ap_req);
1136 /* Possibly not an appropriate error code. */
1137 return KRB5KDC_ERR_BADOPTION;
1140 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1141 krb5_auth_context *auth_context,
1142 const krb5_data *inbuf,
1143 krb5_const_principal server,
1145 krb5_flags *ap_req_options,
1146 krb5_ticket **ticket,
1147 krb5_keyblock **keyblock)
1149 krb5_error_code ret;
1151 krb5_enctype enctype;
1152 krb5_keyblock *local_keyblock;
1154 ret = krb5_rd_req(context,
1165 #ifdef KRB5_TICKET_HAS_KEYINFO
1166 enctype = (*ticket)->enc_part.enctype;
1167 kvno = (*ticket)->enc_part.kvno;
1169 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1175 ret = get_key_from_keytab(context,
1181 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1186 if (ret && local_keyblock != NULL) {
1187 krb5_free_keyblock(context, local_keyblock);
1189 *keyblock = local_keyblock;
1195 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1197 krb5_principal *principal)
1199 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1200 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1203 /* we are cheating here because parse_name will in fact set the realm.
1204 * We don't care as the only caller of smb_krb5_parse_name_norealm
1205 * ignores the realm anyway when calling
1206 * smb_krb5_principal_compare_any_realm later - Guenther */
1208 return smb_krb5_parse_name(context, name, principal);
1211 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1212 krb5_const_principal princ1,
1213 krb5_const_principal princ2)
1215 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1217 return krb5_principal_compare_any_realm(context, princ1, princ2);
1219 /* krb5_princ_size is a macro in MIT */
1220 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1223 const krb5_data *p1, *p2;
1225 len1 = krb5_princ_size(context, princ1);
1226 len2 = krb5_princ_size(context, princ2);
1231 for (i = 0; i < len1; i++) {
1233 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1234 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1236 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1242 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1246 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1247 const char *client_string, /* gd@BER.SUSE.DE */
1248 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1249 time_t *expire_time)
1251 krb5_error_code ret;
1252 krb5_context context = NULL;
1253 krb5_ccache ccache = NULL;
1254 krb5_principal client = NULL;
1255 krb5_creds creds, creds_in, *creds_out = NULL;
1258 ZERO_STRUCT(creds_in);
1260 initialize_krb5_error_table();
1261 ret = krb5_init_context(&context);
1266 if (!ccache_string) {
1267 ccache_string = krb5_cc_default_name(context);
1270 if (!ccache_string) {
1275 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1277 /* FIXME: we should not fall back to defaults */
1278 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1283 if (client_string) {
1284 ret = smb_krb5_parse_name(context, client_string, &client);
1289 ret = krb5_cc_get_principal(context, ccache, &client);
1295 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1297 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1299 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1303 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1305 krb5_kdc_flags flags;
1306 krb5_realm *client_realm = NULL;
1308 ret = krb5_copy_principal(context, client, &creds_in.client);
1313 if (service_string) {
1314 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1319 /* build tgt service by default */
1320 client_realm = krb5_princ_realm(context, creds_in.client);
1321 if (!client_realm) {
1325 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1332 flags.b.renewable = flags.b.renew = True;
1334 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1336 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1343 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1346 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1347 ret = krb5_cc_initialize(context, ccache, client);
1352 ret = krb5_cc_store_cred(context, ccache, &creds);
1355 *expire_time = (time_t) creds.times.endtime;
1359 krb5_free_cred_contents(context, &creds_in);
1362 krb5_free_creds(context, creds_out);
1364 krb5_free_cred_contents(context, &creds);
1368 krb5_free_principal(context, client);
1371 krb5_cc_close(context, ccache);
1374 krb5_free_context(context);
1380 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1382 krb5_error_code ret = 0;
1386 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1387 krb5_free_addresses(context, addr->addrs);
1388 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1389 ret = krb5_free_addresses(context, addr->addrs);
1390 SAFE_FREE(addr->addrs);
1397 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1399 krb5_error_code ret = 0;
1401 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1402 krb5_address **addrs = NULL;
1403 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1404 krb5_addresses *addrs = NULL;
1407 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1408 if (*kerb_addr == NULL) {
1412 put_name(buf, global_myname(), ' ', 0x20);
1414 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1418 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1419 if (addrs == NULL) {
1420 SAFE_FREE(kerb_addr);
1424 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1426 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1427 if (addrs[0] == NULL) {
1429 SAFE_FREE(kerb_addr);
1433 addrs[0]->magic = KV5M_ADDRESS;
1434 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1435 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1436 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1437 if (addrs[0]->contents == NULL) {
1438 SAFE_FREE(addrs[0]);
1440 SAFE_FREE(kerb_addr);
1444 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1448 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1450 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1451 if (addrs == NULL) {
1452 SAFE_FREE(kerb_addr);
1456 memset(addrs, 0, sizeof(krb5_addresses));
1459 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1460 if (addrs->val == NULL) {
1462 SAFE_FREE(kerb_addr);
1466 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1467 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1468 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1469 if (addrs->val[0].address.data == NULL) {
1470 SAFE_FREE(addrs->val);
1472 SAFE_FREE(kerb_addr);
1476 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1479 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1481 (*kerb_addr)->addrs = addrs;
1486 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1488 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1489 krb5_free_error_contents(context, krberror);
1491 krb5_free_error(context, krberror);
1495 krb5_error_code handle_krberror_packet(krb5_context context,
1498 krb5_error_code ret;
1499 bool got_error_code = False;
1501 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1503 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1505 krb5_error krberror;
1507 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1508 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1509 error_message(ret)));
1513 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1514 ret = (krb5_error_code) krberror.error_code;
1515 got_error_code = True;
1518 smb_krb5_free_error(context, &krberror);
1522 krb5_error *krberror;
1524 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1525 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1526 error_message(ret)));
1530 if (krberror->e_data.data == NULL) {
1531 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1532 got_error_code = True;
1534 smb_krb5_free_error(context, krberror);
1537 if (got_error_code) {
1538 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1539 error_message(ret), ret));
1544 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1545 krb5_get_init_creds_opt **opt)
1547 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1548 /* Heimdal or modern MIT version */
1549 return krb5_get_init_creds_opt_alloc(context, opt);
1551 /* Historical MIT version */
1552 krb5_get_init_creds_opt *my_opt;
1556 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1560 krb5_get_init_creds_opt_init(my_opt);
1564 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1567 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1568 krb5_get_init_creds_opt *opt)
1570 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1572 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1573 /* Modern MIT or Heimdal version */
1574 krb5_get_init_creds_opt_free(context, opt);
1576 /* Heimdal version */
1577 krb5_get_init_creds_opt_free(opt);
1578 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1580 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1581 /* Historical MIT version */
1584 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1587 krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
1589 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
1590 return kt_entry->key.enctype;
1591 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
1592 return kt_entry->keyblock.keytype;
1594 #error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
1599 /* caller needs to free etype_s */
1600 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1601 krb5_enctype enctype,
1604 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1605 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1606 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1608 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1612 *etype_s = SMB_STRDUP(buf);
1618 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1622 krb5_error_code smb_krb5_mk_error(krb5_context context,
1623 krb5_error_code error_code,
1624 const krb5_principal server,
1627 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1629 * The MIT interface is *terrible*.
1630 * We have to construct this ourselves...
1634 memset(&e, 0, sizeof(e));
1635 krb5_us_timeofday(context, &e.stime, &e.susec);
1637 #if defined(krb5_err_base)
1638 e.error = error_code - krb5_err_base;
1639 #elif defined(ERROR_TABLE_BASE_krb5)
1640 e.error = error_code - ERROR_TABLE_BASE_krb5;
1642 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1645 return krb5_mk_error(context, &e, reply);
1646 #else /* Heimdal. */
1647 return krb5_mk_error(context,
1659 /**********************************************************************
1660 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1661 * allows to process non-default keytab names.
1662 * @param context krb5_context
1663 * @param keytab_name_req string
1664 * @param write_access bool if writable keytab is required
1665 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1666 * @return krb5_error_code
1667 **********************************************************************/
1669 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1670 #ifndef MAX_KEYTAB_NAME_LEN
1671 #define MAX_KEYTAB_NAME_LEN 1100
1674 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1675 const char *keytab_name_req,
1677 krb5_keytab *keytab)
1679 krb5_error_code ret = 0;
1680 TALLOC_CTX *mem_ctx;
1681 char keytab_string[MAX_KEYTAB_NAME_LEN];
1682 char *kt_str = NULL;
1683 bool found_valid_name = False;
1684 const char *pragma = "FILE";
1685 const char *tmp = NULL;
1687 if (!write_access && !keytab_name_req) {
1688 /* caller just wants to read the default keytab readonly, so be it */
1689 return krb5_kt_default(context, keytab);
1692 mem_ctx = talloc_init("smb_krb5_open_keytab");
1697 #ifdef HAVE_WRFILE_KEYTAB
1703 if (keytab_name_req) {
1705 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1706 ret = KRB5_CONFIG_NOTENUFSPACE;
1710 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1711 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1712 tmp = keytab_name_req;
1716 if (keytab_name_req[0] != '/') {
1717 ret = KRB5_KT_BADNAME;
1721 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1730 /* we need to handle more complex keytab_strings, like:
1731 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1733 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1738 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1740 tmp = talloc_strdup(mem_ctx, keytab_string);
1746 if (strncmp(tmp, "ANY:", 4) == 0) {
1750 memset(&keytab_string, '\0', sizeof(keytab_string));
1752 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1753 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1754 found_valid_name = True;
1759 if (strncmp(kt_str, "FILE:", 5) == 0) {
1760 found_valid_name = True;
1765 if (found_valid_name) {
1766 if (tmp[0] != '/') {
1767 ret = KRB5_KT_BADNAME;
1771 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1780 if (!found_valid_name) {
1781 ret = KRB5_KT_UNKNOWN_TYPE;
1786 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1787 ret = krb5_kt_resolve(context, tmp, keytab);
1790 TALLOC_FREE(mem_ctx);
1794 krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
1795 krb5_context context,
1797 const char **keytab_name)
1799 char keytab_string[MAX_KEYTAB_NAME_LEN];
1800 krb5_error_code ret = 0;
1802 ret = krb5_kt_get_name(context, keytab,
1803 keytab_string, MAX_KEYTAB_NAME_LEN - 2);
1808 *keytab_name = talloc_strdup(mem_ctx, keytab_string);
1809 if (!*keytab_name) {
1816 #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)
1817 /**************************************************************
1818 Routine: ads_krb5_get_fwd_ticket
1820 When a service ticket is flagged as trusted
1821 for delegation we should provide a forwardable
1822 ticket so that the remote host can act on our
1823 behalf. This is done by taking the 2nd forwardable
1824 TGT and storing it in the GSS-API authenticator
1825 "checksum". This routine will populate
1826 the krb5_data authenticator with this TGT.
1828 krb5_context context: The kerberos context for this authentication.
1829 krb5_auth_context: The authentication context.
1830 krb5_creds *credsp: The ticket credentials (AS-REP).
1831 krb5_ccache ccache: The credentials cache.
1832 krb5_data &authenticator: The checksum field that will store the TGT, and
1833 authenticator.data must be freed by the caller.
1836 krb5_error_code: 0 if no errors, otherwise set.
1837 **************************************************************/
1839 static krb5_error_code ads_krb5_get_fwd_ticket( krb5_context context,
1840 krb5_auth_context *auth_context,
1843 krb5_data *authenticator)
1846 krb5_error_code retval = 0;
1847 char *pChksum = NULL;
1850 ZERO_STRUCT(fwdData);
1851 ZERO_STRUCTP(authenticator);
1853 retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
1854 *auth_context, /* Authentication context [in] */
1855 CONST_DISCARD(char *, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
1856 credsp->client, /* Client principal for the tgt [in] */
1857 credsp->server, /* Server principal for the tgt [in] */
1858 ccache, /* Credential cache to use for storage [in] */
1859 1, /* Turn on for "Forwardable ticket" [in] */
1860 &fwdData ); /* Resulting response [out] */
1864 DEBUG(1,("ads_krb5_get_fwd_ticket: krb5_fwd_tgt_creds failed (%s)\n",
1865 error_message(retval)));
1869 if ((unsigned int)GSSAPI_CHECKSUM_SIZE + (unsigned int)fwdData.length <
1870 (unsigned int)GSSAPI_CHECKSUM_SIZE) {
1875 /* We're going to allocate a gssChecksum structure with a little
1876 extra data the length of the kerberos credentials length
1877 (APPLICATION 22) so that we can pack it on the end of the structure.
1880 pChksum = (char *)SMB_MALLOC(GSSAPI_CHECKSUM_SIZE + fwdData.length );
1888 SIVAL(p, 0, GSSAPI_BNDLENGTH);
1891 /* Zero out the bindings fields */
1892 memset(p, '\0', GSSAPI_BNDLENGTH );
1893 p += GSSAPI_BNDLENGTH;
1895 SIVAL(p, 0, GSS_C_DELEG_FLAG );
1899 SSVAL(p, 0, fwdData.length );
1902 /* Migrate the kerberos KRB_CRED data to the checksum delegation */
1903 memcpy(p, fwdData.data, fwdData.length );
1904 p += fwdData.length;
1906 /* We need to do this in order to allow our GSS-API */
1907 retval = krb5_auth_con_set_req_cksumtype( context, *auth_context, GSSAPI_CHECKSUM );
1912 /* We now have a service ticket, now turn it into an AP-REQ. */
1913 authenticator->length = ntohs(fwdData.length + GSSAPI_CHECKSUM_SIZE);
1915 /* Caller should call free() when they're done with this. */
1916 authenticator->data = (char *)pChksum;
1920 /* Remove that input data, we never needed it anyway. */
1921 if (fwdData.length > 0) {
1922 krb5_free_data_contents( context, &fwdData );
1929 #else /* HAVE_KRB5 */
1930 /* this saves a few linking headaches */
1931 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1932 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1933 const char *ccname, time_t *tgs_expire)
1935 DEBUG(0,("NO KERBEROS SUPPORT\n"));