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
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
25 #define KRB5_DEPRECATED 1 /* this file uses DEPRECATED interfaces! */
31 #ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE /* Heimdal */
32 #define KRB5_KEY_TYPE(k) ((k)->keytype)
33 #define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
34 #define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
36 #define KRB5_KEY_TYPE(k) ((k)->enctype)
37 #define KRB5_KEY_LENGTH(k) ((k)->length)
38 #define KRB5_KEY_DATA(k) ((k)->contents)
39 #endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
41 /**************************************************************
42 Wrappers around kerberos string functions that convert from
43 utf8 -> unix charset and vica versa.
44 **************************************************************/
46 /**************************************************************
47 krb5_parse_name that takes a UNIX charset.
48 **************************************************************/
50 krb5_error_code smb_krb5_parse_name(krb5_context context,
51 const char *name, /* in unix charset */
52 krb5_principal *principal)
57 if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
61 ret = krb5_parse_name(context, utf8_name, principal);
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)
79 if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
83 ret = krb5_parse_name_norealm(context, utf8_name, principal);
89 /**************************************************************
90 krb5_parse_name that returns a UNIX charset name. Must
91 be freed with normal free() call.
92 **************************************************************/
94 krb5_error_code smb_krb5_unparse_name(krb5_context context,
95 krb5_const_principal principal,
102 ret = krb5_unparse_name(context, principal, &utf8_name);
107 if (pull_utf8_allocate(unix_name, utf8_name)==-1) {
108 krb5_free_unparsed_name(context, utf8_name);
111 krb5_free_unparsed_name(context, utf8_name);
115 #ifndef HAVE_KRB5_SET_REAL_TIME
117 * This function is not in the Heimdal mainline.
119 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
124 ret = krb5_us_timeofday(context, &sec, &usec);
128 context->kdc_sec_offset = seconds - sec;
129 context->kdc_usec_offset = microseconds - usec;
135 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
137 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
139 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
140 * to krb5_set_default_tgs_ktypes. See
141 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
143 * If the MIT libraries are not exporting internal symbols, we will end up in
144 * this branch, which is correct. Otherwise we will continue to use the
147 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
149 return krb5_set_default_tgs_enctypes(ctx, enc);
152 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
155 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
157 return krb5_set_default_in_tkt_etypes(ctx, enc);
160 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
162 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
164 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
166 void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
168 pkaddr->addr_type = KRB5_ADDRESS_INET;
169 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
170 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
172 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
174 void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
176 pkaddr->addrtype = ADDRTYPE_INET;
177 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
178 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
181 #error UNKNOWN_ADDRTYPE
184 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
185 int create_kerberos_key_from_string_direct(krb5_context context,
186 krb5_principal host_princ,
189 krb5_enctype enctype)
193 krb5_encrypt_block eblock;
195 ret = krb5_principal2salt(context, host_princ, &salt);
197 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
200 krb5_use_enctype(context, &eblock, enctype);
201 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
202 SAFE_FREE(salt.data);
205 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
206 int create_kerberos_key_from_string_direct(krb5_context context,
207 krb5_principal host_princ,
210 krb5_enctype enctype)
215 ret = krb5_get_pw_salt(context, host_princ, &salt);
217 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
221 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
222 krb5_free_salt(context, salt);
226 #error UNKNOWN_CREATE_KEY_FUNCTIONS
229 int create_kerberos_key_from_string(krb5_context context,
230 krb5_principal host_princ,
233 krb5_enctype enctype)
235 krb5_principal salt_princ = NULL;
238 * Check if we've determined that the KDC is salting keys for this
239 * principal/enctype in a non-obvious way. If it is, try to match
242 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
243 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
245 krb5_free_principal(context, salt_princ);
250 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
251 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
252 krb5_enctype **enctypes)
254 return krb5_get_permitted_enctypes(context, enctypes);
256 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
257 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
258 krb5_enctype **enctypes)
260 return krb5_get_default_in_tkt_etypes(context, enctypes);
263 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
266 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
267 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
268 krb5_auth_context auth_context,
269 krb5_keyblock *keyblock)
271 return krb5_auth_con_setkey(context, auth_context, keyblock);
275 BOOL unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
277 DATA_BLOB pac_contents;
281 if (!auth_data->length) {
285 asn1_load(&data, *auth_data);
286 asn1_start_tag(&data, ASN1_SEQUENCE(0));
287 asn1_start_tag(&data, ASN1_SEQUENCE(0));
288 asn1_start_tag(&data, ASN1_CONTEXT(0));
289 asn1_read_Integer(&data, &data_type);
291 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
292 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
298 asn1_start_tag(&data, ASN1_CONTEXT(1));
299 asn1_read_OctetString(&data, &pac_contents);
305 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
307 data_blob_free(&pac_contents);
312 BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
314 DATA_BLOB auth_data_wrapped;
315 BOOL got_auth_data_pac = False;
318 #if defined(HAVE_KRB5_TKT_ENC_PART2)
319 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
320 tkt->enc_part2->authorization_data[0] &&
321 tkt->enc_part2->authorization_data[0]->length)
323 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
325 if (tkt->enc_part2->authorization_data[i]->ad_type !=
326 KRB5_AUTHDATA_IF_RELEVANT) {
327 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
328 tkt->enc_part2->authorization_data[i]->ad_type));
332 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
333 tkt->enc_part2->authorization_data[i]->length);
335 /* check if it is a PAC */
336 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
337 data_blob_free(&auth_data_wrapped);
339 if (!got_auth_data_pac) {
344 return got_auth_data_pac;
348 if (tkt->ticket.authorization_data &&
349 tkt->ticket.authorization_data->len)
351 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
353 if (tkt->ticket.authorization_data->val[i].ad_type !=
354 KRB5_AUTHDATA_IF_RELEVANT) {
355 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
356 tkt->ticket.authorization_data->val[i].ad_type));
360 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
361 tkt->ticket.authorization_data->val[i].ad_data.length);
363 /* check if it is a PAC */
364 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
365 data_blob_free(&auth_data_wrapped);
367 if (!got_auth_data_pac) {
372 return got_auth_data_pac;
378 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
380 #if defined(HAVE_KRB5_TKT_ENC_PART2)
381 return tkt->enc_part2->client;
387 #if !defined(HAVE_KRB5_LOCATE_KDC)
389 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
390 * to a public interface for this functionality, so we have to be able to live
391 * without it if the MIT libraries are hiding their internal symbols.
394 #if defined(KRB5_KRBHST_INIT)
396 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
398 krb5_krbhst_handle hnd;
399 krb5_krbhst_info *hinfo;
408 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
410 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
414 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
417 krb5_krbhst_reset(ctx, hnd);
420 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
421 krb5_krbhst_free(ctx, hnd);
425 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
427 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
428 krb5_krbhst_free(ctx, hnd);
433 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
435 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
437 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
438 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
440 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
444 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
445 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
448 krb5_krbhst_free(ctx, hnd);
455 #else /* ! defined(KRB5_KRBHST_INIT) */
457 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
458 struct sockaddr **addr_pp, int *naddrs, int get_masters)
460 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
461 return KRB5_KDC_UNREACH;
464 #endif /* KRB5_KRBHST_INIT */
466 #else /* ! HAVE_KRB5_LOCATE_KDC */
468 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
469 struct sockaddr **addr_pp, int *naddrs, int get_masters)
471 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
474 #endif /* HAVE_KRB5_LOCATE_KDC */
476 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
477 void krb5_free_unparsed_name(krb5_context context, char *val)
483 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
485 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
487 krb5_free_data_contents(context, pdata);
490 SAFE_FREE(pdata->data);
494 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
496 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
497 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
498 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
499 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
501 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
505 BOOL kerberos_compatible_enctypes(krb5_context context,
506 krb5_enctype enctype1,
507 krb5_enctype enctype2)
509 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
510 krb5_boolean similar = 0;
512 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
513 return similar ? True : False;
514 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
515 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
519 static BOOL ads_cleanup_expired_creds(krb5_context context,
523 krb5_error_code retval;
524 const char *cc_type = krb5_cc_get_type(context, ccache);
526 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
527 cc_type, krb5_cc_get_name(context, ccache),
528 http_timestring(credsp->times.endtime)));
530 /* we will probably need new tickets if the current ones
531 will expire within 10 seconds.
533 if (credsp->times.endtime >= (time(NULL) + 10))
536 /* heimdal won't remove creds from a file ccache, and
537 perhaps we shouldn't anyway, since internally we
538 use memory ccaches, and a FILE one probably means that
539 we're using creds obtained outside of our exectuable
541 if (strequal(cc_type, "FILE")) {
542 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
546 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
548 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
549 error_message(retval)));
550 /* If we have an error in this, we want to display it,
551 but continue as though we deleted it */
557 we can't use krb5_mk_req because w2k wants the service to be in a particular format
559 static krb5_error_code ads_krb5_mk_req(krb5_context context,
560 krb5_auth_context *auth_context,
561 const krb5_flags ap_req_options,
562 const char *principal,
567 krb5_error_code retval;
568 krb5_principal server;
572 BOOL creds_ready = False;
573 int i = 0, maxtries = 3;
575 retval = smb_krb5_parse_name(context, principal, &server);
577 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
581 /* obtain ticket & session key */
583 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
584 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
585 error_message(retval)));
589 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
590 /* This can commonly fail on smbd startup with no ticket in the cache.
591 * Report at higher level than 1. */
592 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
593 error_message(retval)));
597 while (!creds_ready && (i < maxtries)) {
599 if ((retval = krb5_get_credentials(context, 0, ccache,
601 DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
602 principal, error_message(retval)));
606 /* cope with ticket being in the future due to clock skew */
607 if ((unsigned)credsp->times.starttime > time(NULL)) {
608 time_t t = time(NULL);
609 int time_offset =(int)((unsigned)credsp->times.starttime-t);
610 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
611 krb5_set_real_time(context, t + time_offset + 1, 0);
614 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
621 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
622 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
623 http_timestring((unsigned)credsp->times.endtime),
624 (unsigned)credsp->times.endtime));
627 *expire_time = (time_t)credsp->times.endtime;
631 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
632 &in_data, credsp, outbuf);
634 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
635 error_message(retval)));
638 krb5_free_creds(context, credsp);
641 krb5_free_cred_contents(context, &creds);
644 krb5_free_principal(context, server);
650 get a kerberos5 ticket for the given service
652 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
653 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
654 uint32 extra_ap_opts, const char *ccname,
658 krb5_error_code retval;
660 krb5_context context = NULL;
661 krb5_ccache ccdef = NULL;
662 krb5_auth_context auth_context = NULL;
663 krb5_enctype enc_types[] = {
664 #ifdef ENCTYPE_ARCFOUR_HMAC
665 ENCTYPE_ARCFOUR_HMAC,
671 initialize_krb5_error_table();
672 retval = krb5_init_context(&context);
674 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
675 error_message(retval)));
679 if (time_offset != 0) {
680 krb5_set_real_time(context, time(NULL) + time_offset, 0);
683 if ((retval = krb5_cc_resolve(context, ccname ?
684 ccname : krb5_cc_default_name(context), &ccdef))) {
685 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
686 error_message(retval)));
690 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
691 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
692 error_message(retval)));
696 if ((retval = ads_krb5_mk_req(context,
698 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
705 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
707 *ticket = data_blob(packet.data, packet.length);
709 kerberos_free_data_contents(context, &packet);
715 krb5_cc_close(context, ccdef);
717 krb5_auth_con_free(context, auth_context);
718 krb5_free_context(context);
724 BOOL get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
731 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
733 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
734 if (err == 0 && skey != NULL) {
735 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
736 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
737 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
741 krb5_free_keyblock(context, skey);
743 DEBUG(10, ("KRB5 error getting session key %d\n", err));
750 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
751 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
753 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
755 static krb5_data kdata;
757 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
758 kdata.length = strlen((const char *)kdata.data);
763 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
765 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
766 return krb5_kt_free_entry(context, kt_entry);
767 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
768 return krb5_free_keytab_entry_contents(context, kt_entry);
770 #error UNKNOWN_KT_FREE_FUNCTION
774 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
775 PAC_SIGNATURE_DATA *sig)
777 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
778 cksum->cksumtype = (krb5_cksumtype)sig->type;
779 cksum->checksum.length = sig->signature.buf_len;
780 cksum->checksum.data = sig->signature.buffer;
782 cksum->checksum_type = (krb5_cksumtype)sig->type;
783 cksum->length = sig->signature.buf_len;
784 cksum->contents = sig->signature.buffer;
788 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
789 krb5_keyblock *keyblock,
791 krb5_checksum *cksum,
797 /* verify the checksum */
799 /* welcome to the wonderful world of samba's kerberos abstraction layer:
801 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
802 * -----------------------------------------------------------------------------
803 * krb5_c_verify_checksum - works works
804 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
807 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
809 krb5_boolean checksum_valid = False;
812 input.data = (char *)data;
813 input.length = length;
815 ret = krb5_c_verify_checksum(context,
822 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
823 error_message(ret)));
828 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
831 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
833 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
834 * without enctype and it ignores any key_usage types - Guenther */
839 ret = krb5_crypto_init(context,
844 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
845 error_message(ret)));
849 ret = krb5_verify_checksum(context,
856 krb5_crypto_destroy(context, crypto);
860 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
866 time_t get_authtime_from_tkt(krb5_ticket *tkt)
868 #if defined(HAVE_KRB5_TKT_ENC_PART2)
869 return tkt->enc_part2->times.authtime;
871 return tkt->ticket.authtime;
875 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
876 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
878 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
879 if (ap_req->ticket->enc_part.kvno)
880 return ap_req->ticket->enc_part.kvno;
882 if (ap_req->ticket.enc_part.kvno)
883 return *ap_req->ticket.enc_part.kvno;
888 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
890 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
891 return ap_req->ticket.enc_part.etype;
893 return ap_req->ticket->enc_part.enctype;
896 #endif /* HAVE_KRB5_DECODE_AP_REQ */
898 static krb5_error_code
899 get_key_from_keytab(krb5_context context,
900 krb5_const_principal server,
901 krb5_enctype enctype,
903 krb5_keyblock **out_key)
905 krb5_keytab_entry entry;
910 /* We have to open a new keytab handle here, as MIT does
911 an implicit open/getnext/close on krb5_kt_get_entry. We
912 may be in the middle of a keytab enumeration when this is
915 ret = krb5_kt_default(context, &keytab);
917 DEBUG(0,("get_key_from_keytab: failed to open keytab: %s\n", error_message(ret)));
921 if ( DEBUGLEVEL >= 10 ) {
922 if (smb_krb5_unparse_name(context, server, &name) == 0) {
923 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
924 kvno, enctype, name));
929 ret = krb5_kt_get_entry(context,
937 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
941 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
942 ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
943 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
944 ret = krb5_copy_keyblock(context, &entry.key, out_key);
946 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
950 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
954 smb_krb5_kt_free_entry(context, &entry);
957 krb5_kt_close(context, keytab);
963 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
964 const krb5_data *inbuf,
966 krb5_enctype *enctype)
968 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
973 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
977 *kvno = get_kvno_from_ap_req(&ap_req);
978 *enctype = get_enctype_from_ap_req(&ap_req);
980 free_AP_REQ(&ap_req);
985 /* Possibly not an appropriate error code. */
986 return KRB5KDC_ERR_BADOPTION;
989 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
990 krb5_auth_context *auth_context,
991 const krb5_data *inbuf,
992 krb5_const_principal server,
994 krb5_flags *ap_req_options,
995 krb5_ticket **ticket,
996 krb5_keyblock **keyblock)
1000 krb5_enctype enctype;
1001 krb5_keyblock *local_keyblock;
1003 ret = krb5_rd_req(context,
1014 #ifdef KRB5_TICKET_HAS_KEYINFO
1015 enctype = (*ticket)->enc_part.enctype;
1016 kvno = (*ticket)->enc_part.kvno;
1018 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1024 ret = get_key_from_keytab(context,
1030 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1035 if (ret && local_keyblock != NULL) {
1036 krb5_free_keyblock(context, local_keyblock);
1038 *keyblock = local_keyblock;
1044 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1046 krb5_principal *principal)
1048 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1049 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1052 /* we are cheating here because parse_name will in fact set the realm.
1053 * We don't care as the only caller of smb_krb5_parse_name_norealm
1054 * ignores the realm anyway when calling
1055 * smb_krb5_principal_compare_any_realm later - Guenther */
1057 return smb_krb5_parse_name(context, name, principal);
1060 BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
1061 krb5_const_principal princ1,
1062 krb5_const_principal princ2)
1064 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1066 return krb5_principal_compare_any_realm(context, princ1, princ2);
1068 /* krb5_princ_size is a macro in MIT */
1069 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1072 const krb5_data *p1, *p2;
1074 len1 = krb5_princ_size(context, princ1);
1075 len2 = krb5_princ_size(context, princ2);
1080 for (i = 0; i < len1; i++) {
1082 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1083 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1085 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1091 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1095 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1096 const char *client_string, /* gd@BER.SUSE.DE */
1097 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1098 time_t *new_start_time)
1100 krb5_error_code ret;
1101 krb5_context context = NULL;
1102 krb5_ccache ccache = NULL;
1103 krb5_principal client = NULL;
1105 initialize_krb5_error_table();
1106 ret = krb5_init_context(&context);
1111 if (!ccache_string) {
1112 ccache_string = krb5_cc_default_name(context);
1115 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1117 /* FIXME: we should not fall back to defaults */
1118 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1123 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1127 if (client_string) {
1128 ret = smb_krb5_parse_name(context, client_string, &client);
1133 ret = krb5_cc_get_principal(context, ccache, &client);
1139 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1141 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1145 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1146 ret = krb5_cc_initialize(context, ccache, client);
1151 ret = krb5_cc_store_cred(context, ccache, &creds);
1153 if (new_start_time) {
1154 *new_start_time = (time_t) creds.times.renew_till;
1157 krb5_free_cred_contents(context, &creds);
1159 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1161 krb5_kdc_flags flags;
1162 krb5_creds creds_in;
1163 krb5_realm *client_realm;
1166 memset(&creds_in, 0, sizeof(creds_in));
1168 if (client_string) {
1169 ret = smb_krb5_parse_name(context, client_string, &creds_in.client);
1174 ret = krb5_cc_get_principal(context, ccache, &creds_in.client);
1180 if (service_string) {
1181 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1186 /* build tgt service by default */
1187 client_realm = krb5_princ_realm(context, client);
1188 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1195 flags.b.renewable = flags.b.renew = True;
1197 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds);
1199 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1203 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1204 ret = krb5_cc_initialize(context, ccache, creds_in.client);
1209 ret = krb5_cc_store_cred(context, ccache, creds);
1211 if (new_start_time) {
1212 *new_start_time = (time_t) creds->times.renew_till;
1215 krb5_free_cred_contents(context, &creds_in);
1216 krb5_free_creds(context, creds);
1219 #error NO_SUITABKE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1225 krb5_free_principal(context, client);
1228 krb5_free_context(context);
1231 krb5_cc_close(context, ccache);
1238 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1240 krb5_error_code ret = 0;
1244 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1245 krb5_free_addresses(context, addr->addrs);
1246 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1247 ret = krb5_free_addresses(context, addr->addrs);
1248 SAFE_FREE(addr->addrs);
1255 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1257 krb5_error_code ret = 0;
1259 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1260 krb5_address **addrs = NULL;
1261 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1262 krb5_addresses *addrs = NULL;
1265 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1266 if (*kerb_addr == NULL) {
1270 put_name(buf, global_myname(), ' ', 0x20);
1272 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1276 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1277 if (addrs == NULL) {
1278 SAFE_FREE(kerb_addr);
1282 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1284 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1285 if (addrs[0] == NULL) {
1287 SAFE_FREE(kerb_addr);
1291 addrs[0]->magic = KV5M_ADDRESS;
1292 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1293 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1294 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1295 if (addrs[0]->contents == NULL) {
1296 SAFE_FREE(addrs[0]);
1298 SAFE_FREE(kerb_addr);
1302 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1306 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1308 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1309 if (addrs == NULL) {
1310 SAFE_FREE(kerb_addr);
1314 memset(addrs, 0, sizeof(krb5_addresses));
1317 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1318 if (addrs->val == NULL) {
1320 SAFE_FREE(kerb_addr);
1324 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1325 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1326 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1327 if (addrs->val[0].address.data == NULL) {
1328 SAFE_FREE(addrs->val);
1330 SAFE_FREE(kerb_addr);
1334 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1337 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1339 (*kerb_addr)->addrs = addrs;
1344 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1346 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1347 krb5_free_error_contents(context, krberror);
1349 krb5_free_error(context, krberror);
1353 krb5_error_code handle_krberror_packet(krb5_context context,
1356 krb5_error_code ret;
1357 BOOL got_error_code = False;
1359 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1361 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1363 krb5_error krberror;
1365 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1366 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1367 error_message(ret)));
1371 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1372 ret = (krb5_error_code) krberror.error_code;
1373 got_error_code = True;
1376 smb_krb5_free_error(context, &krberror);
1380 krb5_error *krberror;
1382 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1383 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1384 error_message(ret)));
1388 if (krberror->e_data.data == NULL) {
1389 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1390 got_error_code = True;
1392 smb_krb5_free_error(context, krberror);
1395 if (got_error_code) {
1396 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1397 error_message(ret), ret));
1402 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1403 krb5_get_init_creds_opt **opt)
1405 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1406 /* Heimdal or modern MIT version */
1407 return krb5_get_init_creds_opt_alloc(context, opt);
1409 /* Historical MIT version */
1410 krb5_get_init_creds_opt *my_opt;
1414 if ((my_opt = SMB_MALLOC(sizeof(krb5_get_init_creds_opt))) == NULL) {
1418 krb5_get_init_creds_opt_init(my_opt);
1422 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1425 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1426 krb5_get_init_creds_opt *opt)
1428 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1430 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1431 /* Modern MIT or Heimdal version */
1432 krb5_get_init_creds_opt_free(context, opt);
1434 /* Heimdal version */
1435 krb5_get_init_creds_opt_free(opt);
1436 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1438 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1439 /* Historical MIT version */
1442 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1445 krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
1447 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
1448 return kt_entry->key.enctype;
1449 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
1450 return kt_entry->keyblock.keytype;
1452 #error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
1457 /* caller needs to free etype_s */
1458 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1459 krb5_enctype enctype,
1462 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1463 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1464 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1466 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1470 *etype_s = SMB_STRDUP(buf);
1476 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1480 krb5_error_code smb_krb5_mk_error(krb5_context context,
1481 krb5_error_code error_code,
1482 const krb5_principal server,
1485 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1487 * The MIT interface is *terrible*.
1488 * We have to construct this ourselves...
1492 memset(&e, 0, sizeof(e));
1493 krb5_us_timeofday(context, &e.stime, &e.susec);
1495 #if defined(krb5_err_base)
1496 e.error = error_code - krb5_err_base;
1497 #elif defined(ERROR_TABLE_BASE_krb5)
1498 e.error = error_code - ERROR_TABLE_BASE_krb5;
1500 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1503 return krb5_mk_error(context, &e, reply);
1504 #else /* Heimdal. */
1505 return krb5_mk_error(context,
1517 #else /* HAVE_KRB5 */
1518 /* this saves a few linking headaches */
1519 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1520 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1521 const char *ccname, time_t *tgs_expire)
1523 DEBUG(0,("NO KERBEROS SUPPORT\n"));