2 Unix SMB/CIFS implementation.
3 kerberos utility library
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Remus Koos 2001
6 Copyright (C) Nalin Dahyabhai <nalin@redhat.com> 2004.
7 Copyright (C) Jeremy Allison 2004.
8 Copyright (C) Gerald Carter 2006.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
29 #define DEFAULT_KRB5_PORT 88
31 #define LIBADS_CCACHE_NAME "MEMORY:libads"
34 we use a prompter to avoid a crash bug in the kerberos libs when
35 dealing with empty passwords
36 this prompter is just a string copy ...
38 static krb5_error_code
39 kerb_prompter(krb5_context ctx
, void *data
,
43 krb5_prompt prompts
[])
45 if (num_prompts
== 0) return 0;
47 memset(prompts
[0].reply
->data
, '\0', prompts
[0].reply
->length
);
48 if (prompts
[0].reply
->length
> 0) {
50 strncpy(prompts
[0].reply
->data
, (const char *)data
,
51 prompts
[0].reply
->length
-1);
52 prompts
[0].reply
->length
= strlen(prompts
[0].reply
->data
);
54 prompts
[0].reply
->length
= 0;
60 static bool smb_krb5_get_ntstatus_from_krb5_error(krb5_error
*error
,
64 DATA_BLOB unwrapped_edata
;
66 struct KRB5_EDATA_NTSTATUS parsed_edata
;
67 enum ndr_err_code ndr_err
;
69 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR
70 edata
= data_blob(error
->e_data
->data
, error
->e_data
->length
);
72 edata
= data_blob(error
->e_data
.data
, error
->e_data
.length
);
73 #endif /* HAVE_E_DATA_POINTER_IN_KRB5_ERROR */
76 dump_data(10, edata
.data
, edata
.length
);
77 #endif /* DEVELOPER */
79 mem_ctx
= talloc_init("smb_krb5_get_ntstatus_from_krb5_error");
80 if (mem_ctx
== NULL
) {
81 data_blob_free(&edata
);
85 if (!unwrap_edata_ntstatus(mem_ctx
, &edata
, &unwrapped_edata
)) {
86 data_blob_free(&edata
);
91 data_blob_free(&edata
);
93 ndr_err
= ndr_pull_struct_blob_all(&unwrapped_edata
, mem_ctx
, NULL
,
95 (ndr_pull_flags_fn_t
)ndr_pull_KRB5_EDATA_NTSTATUS
);
96 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
97 data_blob_free(&unwrapped_edata
);
102 data_blob_free(&unwrapped_edata
);
105 *nt_status
= parsed_edata
.ntstatus
;
108 TALLOC_FREE(mem_ctx
);
113 static bool smb_krb5_get_ntstatus_from_krb5_error_init_creds_opt(krb5_context ctx
,
114 krb5_get_init_creds_opt
*opt
,
118 krb5_error
*error
= NULL
;
120 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_GET_ERROR
121 ret
= krb5_get_init_creds_opt_get_error(ctx
, opt
, &error
);
123 DEBUG(1,("krb5_get_init_creds_opt_get_error gave: %s\n",
124 error_message(ret
)));
127 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_GET_ERROR */
130 DEBUG(1,("no krb5_error\n"));
134 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR
135 if (!error
->e_data
) {
137 if (error
->e_data
.data
== NULL
) {
138 #endif /* HAVE_E_DATA_POINTER_IN_KRB5_ERROR */
139 DEBUG(1,("no edata in krb5_error\n"));
140 krb5_free_error(ctx
, error
);
144 ret
= smb_krb5_get_ntstatus_from_krb5_error(error
, nt_status
);
146 krb5_free_error(ctx
, error
);
152 simulate a kinit, putting the tgt in the given cache location. If cache_name == NULL
153 place in default cache location.
156 int kerberos_kinit_password_ext(const char *principal
,
157 const char *password
,
160 time_t *renew_till_time
,
161 const char *cache_name
,
163 bool add_netbios_addr
,
164 time_t renewable_time
,
167 krb5_context ctx
= NULL
;
168 krb5_error_code code
= 0;
169 krb5_ccache cc
= NULL
;
170 krb5_principal me
= NULL
;
172 krb5_get_init_creds_opt
*opt
= NULL
;
173 smb_krb5_addresses
*addr
= NULL
;
175 ZERO_STRUCT(my_creds
);
177 initialize_krb5_error_table();
178 if ((code
= krb5_init_context(&ctx
)))
181 if (time_offset
!= 0) {
182 krb5_set_real_time(ctx
, time(NULL
) + time_offset
, 0);
185 DEBUG(10,("kerberos_kinit_password: as %s using [%s] as ccache and config [%s]\n",
187 cache_name
? cache_name
: krb5_cc_default_name(ctx
),
188 getenv("KRB5_CONFIG")));
190 if ((code
= krb5_cc_resolve(ctx
, cache_name
? cache_name
: krb5_cc_default_name(ctx
), &cc
))) {
194 if ((code
= smb_krb5_parse_name(ctx
, principal
, &me
))) {
198 if ((code
= smb_krb5_get_init_creds_opt_alloc(ctx
, &opt
))) {
202 krb5_get_init_creds_opt_set_renew_life(opt
, renewable_time
);
203 krb5_get_init_creds_opt_set_forwardable(opt
, True
);
206 krb5_get_init_creds_opt_set_tkt_life(opt
, 60);
209 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_SET_PAC_REQUEST
211 if ((code
= krb5_get_init_creds_opt_set_pac_request(ctx
, opt
, (krb5_boolean
)request_pac
))) {
216 if (add_netbios_addr
) {
217 if ((code
= smb_krb5_gen_netbios_krb5_address(&addr
))) {
220 krb5_get_init_creds_opt_set_address_list(opt
, addr
->addrs
);
223 if ((code
= krb5_get_init_creds_password(ctx
, &my_creds
, me
, CONST_DISCARD(char *,password
),
224 kerb_prompter
, CONST_DISCARD(char *,password
),
229 if ((code
= krb5_cc_initialize(ctx
, cc
, me
))) {
233 if ((code
= krb5_cc_store_cred(ctx
, cc
, &my_creds
))) {
238 *expire_time
= (time_t) my_creds
.times
.endtime
;
241 if (renew_till_time
) {
242 *renew_till_time
= (time_t) my_creds
.times
.renew_till
;
251 *ntstatus
= NT_STATUS_OK
;
255 /* try to get ntstatus code out of krb5_error when we have it
256 * inside the krb5_get_init_creds_opt - gd */
258 if (opt
&& smb_krb5_get_ntstatus_from_krb5_error_init_creds_opt(ctx
, opt
, &status
)) {
263 /* fall back to self-made-mapping */
264 *ntstatus
= krb5_to_nt_status(code
);
268 krb5_free_cred_contents(ctx
, &my_creds
);
270 krb5_free_principal(ctx
, me
);
273 smb_krb5_free_addresses(ctx
, addr
);
276 smb_krb5_get_init_creds_opt_free(ctx
, opt
);
279 krb5_cc_close(ctx
, cc
);
282 krb5_free_context(ctx
);
289 /* run kinit to setup our ccache */
290 int ads_kinit_password(ADS_STRUCT
*ads
)
294 const char *account_name
;
297 if (ads
->auth
.flags
& ADS_AUTH_USER_CREDS
) {
298 account_name
= ads
->auth
.user_name
;
299 goto got_accountname
;
303 /* this will end up getting a ticket for DOMAIN@RUSTED.REA.LM */
304 account_name
= lp_workgroup();
306 /* always use the sAMAccountName for security = domain */
307 /* global_myname()$@REA.LM */
308 if ( lp_security() == SEC_DOMAIN
) {
309 fstr_sprintf( acct_name
, "%s$", global_myname() );
310 account_name
= acct_name
;
313 /* This looks like host/global_myname()@REA.LM */
314 account_name
= ads
->auth
.user_name
;
318 if (asprintf(&s
, "%s@%s", account_name
, ads
->auth
.realm
) == -1) {
319 return KRB5_CC_NOMEM
;
322 if (!ads
->auth
.password
) {
324 return KRB5_LIBOS_CANTREADPWD
;
327 ret
= kerberos_kinit_password_ext(s
, ads
->auth
.password
, ads
->auth
.time_offset
,
328 &ads
->auth
.tgt_expire
, NULL
, NULL
, False
, False
, ads
->auth
.renewable
,
332 DEBUG(0,("kerberos_kinit_password %s failed: %s\n",
333 s
, error_message(ret
)));
339 int ads_kdestroy(const char *cc_name
)
341 krb5_error_code code
;
342 krb5_context ctx
= NULL
;
343 krb5_ccache cc
= NULL
;
345 initialize_krb5_error_table();
346 if ((code
= krb5_init_context (&ctx
))) {
347 DEBUG(3, ("ads_kdestroy: kdb5_init_context failed: %s\n",
348 error_message(code
)));
353 if ((code
= krb5_cc_default(ctx
, &cc
))) {
354 krb5_free_context(ctx
);
358 if ((code
= krb5_cc_resolve(ctx
, cc_name
, &cc
))) {
359 DEBUG(3, ("ads_kdestroy: krb5_cc_resolve failed: %s\n",
360 error_message(code
)));
361 krb5_free_context(ctx
);
366 if ((code
= krb5_cc_destroy (ctx
, cc
))) {
367 DEBUG(3, ("ads_kdestroy: krb5_cc_destroy failed: %s\n",
368 error_message(code
)));
371 krb5_free_context (ctx
);
375 /************************************************************************
376 Routine to fetch the salting principal for a service. Active
377 Directory may use a non-obvious principal name to generate the salt
378 when it determines the key to use for encrypting tickets for a service,
379 and hopefully we detected that when we joined the domain.
380 ************************************************************************/
382 static char *kerberos_secrets_fetch_salting_principal(const char *service
, int enctype
)
387 if (asprintf(&key
, "%s/%s/enctype=%d",
388 SECRETS_SALTING_PRINCIPAL
, service
, enctype
) == -1) {
391 ret
= (char *)secrets_fetch(key
, NULL
);
396 /************************************************************************
397 Return the standard DES salt key
398 ************************************************************************/
400 char* kerberos_standard_des_salt( void )
404 fstr_sprintf( salt
, "host/%s.%s@", global_myname(), lp_realm() );
406 fstrcat( salt
, lp_realm() );
408 return SMB_STRDUP( salt
);
411 /************************************************************************
412 ************************************************************************/
414 static char* des_salt_key( void )
418 if (asprintf(&key
, "%s/DES/%s", SECRETS_SALTING_PRINCIPAL
,
426 /************************************************************************
427 ************************************************************************/
429 bool kerberos_secrets_store_des_salt( const char* salt
)
434 if ( (key
= des_salt_key()) == NULL
) {
435 DEBUG(0,("kerberos_secrets_store_des_salt: failed to generate key!\n"));
440 DEBUG(8,("kerberos_secrets_store_des_salt: deleting salt\n"));
441 secrets_delete( key
);
445 DEBUG(3,("kerberos_secrets_store_des_salt: Storing salt \"%s\"\n", salt
));
447 ret
= secrets_store( key
, salt
, strlen(salt
)+1 );
454 /************************************************************************
455 ************************************************************************/
457 char* kerberos_secrets_fetch_des_salt( void )
461 if ( (key
= des_salt_key()) == NULL
) {
462 DEBUG(0,("kerberos_secrets_fetch_des_salt: failed to generate key!\n"));
466 salt
= (char*)secrets_fetch( key
, NULL
);
473 /************************************************************************
474 Routine to get the default realm from the kerberos credentials cache.
475 Caller must free if the return value is not NULL.
476 ************************************************************************/
478 char *kerberos_get_default_realm_from_ccache( void )
481 krb5_context ctx
= NULL
;
482 krb5_ccache cc
= NULL
;
483 krb5_principal princ
= NULL
;
485 initialize_krb5_error_table();
486 if (krb5_init_context(&ctx
)) {
490 DEBUG(5,("kerberos_get_default_realm_from_ccache: "
491 "Trying to read krb5 cache: %s\n",
492 krb5_cc_default_name(ctx
)));
493 if (krb5_cc_default(ctx
, &cc
)) {
494 DEBUG(0,("kerberos_get_default_realm_from_ccache: "
495 "failed to read default cache\n"));
498 if (krb5_cc_get_principal(ctx
, cc
, &princ
)) {
499 DEBUG(0,("kerberos_get_default_realm_from_ccache: "
500 "failed to get default principal\n"));
504 #if defined(HAVE_KRB5_PRINCIPAL_GET_REALM)
505 realm
= SMB_STRDUP(krb5_principal_get_realm(ctx
, princ
));
506 #elif defined(HAVE_KRB5_PRINC_REALM)
508 krb5_data
*realm_data
= krb5_princ_realm(ctx
, princ
);
509 realm
= SMB_STRNDUP(realm_data
->data
, realm_data
->length
);
517 krb5_free_principal(ctx
, princ
);
520 krb5_cc_close(ctx
, cc
);
522 krb5_free_context(ctx
);
529 /************************************************************************
530 Routine to get the salting principal for this service. This is
531 maintained for backwards compatibilty with releases prior to 3.0.24.
532 Since we store the salting principal string only at join, we may have
533 to look for the older tdb keys. Caller must free if return is not null.
534 ************************************************************************/
536 krb5_principal
kerberos_fetch_salt_princ_for_host_princ(krb5_context context
,
537 krb5_principal host_princ
,
540 char *unparsed_name
= NULL
, *salt_princ_s
= NULL
;
541 krb5_principal ret_princ
= NULL
;
543 /* lookup new key first */
545 if ( (salt_princ_s
= kerberos_secrets_fetch_des_salt()) == NULL
) {
547 /* look under the old key. If this fails, just use the standard key */
549 if (smb_krb5_unparse_name(talloc_tos(), context
, host_princ
, &unparsed_name
) != 0) {
550 return (krb5_principal
)NULL
;
552 if ((salt_princ_s
= kerberos_secrets_fetch_salting_principal(unparsed_name
, enctype
)) == NULL
) {
553 /* fall back to host/machine.realm@REALM */
554 salt_princ_s
= kerberos_standard_des_salt();
558 if (smb_krb5_parse_name(context
, salt_princ_s
, &ret_princ
) != 0) {
562 TALLOC_FREE(unparsed_name
);
563 SAFE_FREE(salt_princ_s
);
568 /************************************************************************
569 Routine to set the salting principal for this service. Active
570 Directory may use a non-obvious principal name to generate the salt
571 when it determines the key to use for encrypting tickets for a service,
572 and hopefully we detected that when we joined the domain.
573 Setting principal to NULL deletes this entry.
574 ************************************************************************/
576 bool kerberos_secrets_store_salting_principal(const char *service
,
578 const char *principal
)
582 krb5_context context
= NULL
;
583 krb5_principal princ
= NULL
;
584 char *princ_s
= NULL
;
585 char *unparsed_name
= NULL
;
586 krb5_error_code code
;
588 if (((code
= krb5_init_context(&context
)) != 0) || (context
== NULL
)) {
589 DEBUG(5, ("kerberos_secrets_store_salting_pricipal: kdb5_init_context failed: %s\n",
590 error_message(code
)));
593 if (strchr_m(service
, '@')) {
594 if (asprintf(&princ_s
, "%s", service
) == -1) {
598 if (asprintf(&princ_s
, "%s@%s", service
, lp_realm()) == -1) {
603 if (smb_krb5_parse_name(context
, princ_s
, &princ
) != 0) {
607 if (smb_krb5_unparse_name(talloc_tos(), context
, princ
, &unparsed_name
) != 0) {
611 if (asprintf(&key
, "%s/%s/enctype=%d",
612 SECRETS_SALTING_PRINCIPAL
, unparsed_name
, enctype
)
617 if ((principal
!= NULL
) && (strlen(principal
) > 0)) {
618 ret
= secrets_store(key
, principal
, strlen(principal
) + 1);
620 ret
= secrets_delete(key
);
627 TALLOC_FREE(unparsed_name
);
630 krb5_free_principal(context
, princ
);
634 krb5_free_context(context
);
641 /************************************************************************
642 ************************************************************************/
644 int kerberos_kinit_password(const char *principal
,
645 const char *password
,
647 const char *cache_name
)
649 return kerberos_kinit_password_ext(principal
,
661 /************************************************************************
662 ************************************************************************/
664 static char *print_kdc_line(char *mem_ctx
,
665 const char *prev_line
,
666 const struct sockaddr_storage
*pss
,
667 const char *kdc_name
)
669 char *kdc_str
= NULL
;
671 if (pss
->ss_family
== AF_INET
) {
672 kdc_str
= talloc_asprintf(mem_ctx
, "%s\tkdc = %s\n",
674 print_canonical_sockaddr(mem_ctx
, pss
));
676 char addr
[INET6_ADDRSTRLEN
];
677 uint16_t port
= get_sockaddr_port(pss
);
679 DEBUG(10,("print_kdc_line: IPv6 case for kdc_name: %s, port: %d\n",
682 if (port
!= 0 && port
!= DEFAULT_KRB5_PORT
) {
683 /* Currently for IPv6 we can't specify a non-default
684 krb5 port with an address, as this requires a ':'.
685 Resolve to a name. */
686 char hostname
[MAX_DNS_NAME_LENGTH
];
687 int ret
= sys_getnameinfo((const struct sockaddr
*)pss
,
689 hostname
, sizeof(hostname
),
693 DEBUG(0,("print_kdc_line: can't resolve name "
694 "for kdc with non-default port %s. "
696 print_canonical_sockaddr(mem_ctx
, pss
),
700 /* Success, use host:port */
701 kdc_str
= talloc_asprintf(mem_ctx
,
708 /* no krb5 lib currently supports "kdc = ipv6 address"
709 * at all, so just fill in just the kdc_name if we have
710 * it and let the krb5 lib figure out the appropriate
711 * ipv6 address - gd */
714 kdc_str
= talloc_asprintf(mem_ctx
, "%s\tkdc = %s\n",
715 prev_line
, kdc_name
);
717 kdc_str
= talloc_asprintf(mem_ctx
, "%s\tkdc = %s\n",
728 /************************************************************************
729 Create a string list of available kdc's, possibly searching by sitename.
732 If "sitename" is given, the DC's in that site are listed first.
734 ************************************************************************/
736 static char *get_kdc_ip_string(char *mem_ctx
,
738 const char *sitename
,
739 struct sockaddr_storage
*pss
,
740 const char *kdc_name
)
743 struct ip_service
*ip_srv_site
= NULL
;
744 struct ip_service
*ip_srv_nonsite
= NULL
;
747 char *kdc_str
= print_kdc_line(mem_ctx
, "", pss
, kdc_name
);
749 if (kdc_str
== NULL
) {
754 * First get the KDC's only in this site, the rest will be
760 get_kdc_list(realm
, sitename
, &ip_srv_site
, &count_site
);
762 for (i
= 0; i
< count_site
; i
++) {
763 if (sockaddr_equal((struct sockaddr
*)&ip_srv_site
[i
].ss
,
764 (struct sockaddr
*)pss
)) {
767 /* Append to the string - inefficient
768 * but not done often. */
769 kdc_str
= print_kdc_line(mem_ctx
,
774 SAFE_FREE(ip_srv_site
);
782 get_kdc_list(realm
, NULL
, &ip_srv_nonsite
, &count_nonsite
);
784 for (i
= 0; i
< count_nonsite
; i
++) {
787 if (sockaddr_equal((struct sockaddr
*)&ip_srv_nonsite
[i
].ss
, (struct sockaddr
*)pss
)) {
791 /* Ensure this isn't an IP already seen (YUK! this is n*n....) */
792 for (j
= 0; j
< count_site
; j
++) {
793 if (sockaddr_equal((struct sockaddr
*)&ip_srv_nonsite
[i
].ss
,
794 (struct sockaddr
*)&ip_srv_site
[j
].ss
)) {
797 /* As the lists are sorted we can break early if nonsite > site. */
798 if (ip_service_compare(&ip_srv_nonsite
[i
], &ip_srv_site
[j
]) > 0) {
806 /* Append to the string - inefficient but not done often. */
807 kdc_str
= print_kdc_line(mem_ctx
,
809 &ip_srv_nonsite
[i
].ss
,
812 SAFE_FREE(ip_srv_site
);
813 SAFE_FREE(ip_srv_nonsite
);
819 SAFE_FREE(ip_srv_site
);
820 SAFE_FREE(ip_srv_nonsite
);
822 DEBUG(10,("get_kdc_ip_string: Returning %s\n",
828 /************************************************************************
829 Create a specific krb5.conf file in the private directory pointing
830 at a specific kdc for a realm. Keyed off domain name. Sets
831 KRB5_CONFIG environment variable to point to this file. Must be
832 run as root or will fail (which is a good thing :-).
833 ************************************************************************/
835 bool create_local_private_krb5_conf_for_domain(const char *realm
,
837 const char *sitename
,
838 struct sockaddr_storage
*pss
,
839 const char *kdc_name
)
841 char *dname
= lock_path("smb_krb5");
842 char *tmpname
= NULL
;
844 char *file_contents
= NULL
;
845 char *kdc_ip_string
= NULL
;
849 char *realm_upper
= NULL
;
855 if ((mkdir(dname
, 0755)==-1) && (errno
!= EEXIST
)) {
856 DEBUG(0,("create_local_private_krb5_conf_for_domain: "
857 "failed to create directory %s. Error was %s\n",
858 dname
, strerror(errno
) ));
862 tmpname
= lock_path("smb_tmp_krb5.XXXXXX");
867 fname
= talloc_asprintf(dname
, "%s/krb5.conf.%s", dname
, domain
);
872 DEBUG(10,("create_local_private_krb5_conf_for_domain: fname = %s, realm = %s, domain = %s\n",
873 fname
, realm
, domain
));
875 realm_upper
= talloc_strdup(fname
, realm
);
876 strupper_m(realm_upper
);
878 kdc_ip_string
= get_kdc_ip_string(dname
, realm
, sitename
, pss
, kdc_name
);
879 if (!kdc_ip_string
) {
883 file_contents
= talloc_asprintf(fname
,
884 "[libdefaults]\n\tdefault_realm = %s\n"
885 "\tdefault_tgs_enctypes = RC4-HMAC DES-CBC-CRC DES-CBC-MD5\n"
886 "\tdefault_tkt_enctypes = RC4-HMAC DES-CBC-CRC DES-CBC-MD5\n"
887 "\tpreferred_enctypes = RC4-HMAC DES-CBC-CRC DES-CBC-MD5\n\n"
888 "[realms]\n\t%s = {\n"
890 realm_upper
, realm_upper
, kdc_ip_string
);
892 if (!file_contents
) {
896 flen
= strlen(file_contents
);
898 fd
= smb_mkstemp(tmpname
);
900 DEBUG(0,("create_local_private_krb5_conf_for_domain: smb_mkstemp failed,"
901 " for file %s. Errno %s\n",
902 tmpname
, strerror(errno
) ));
906 if (fchmod(fd
, 0644)==-1) {
907 DEBUG(0,("create_local_private_krb5_conf_for_domain: fchmod failed for %s."
909 tmpname
, strerror(errno
) ));
915 ret
= write(fd
, file_contents
, flen
);
917 DEBUG(0,("create_local_private_krb5_conf_for_domain: write failed,"
918 " returned %d (should be %u). Errno %s\n",
919 (int)ret
, (unsigned int)flen
, strerror(errno
) ));
925 DEBUG(0,("create_local_private_krb5_conf_for_domain: close failed."
926 " Errno %s\n", strerror(errno
) ));
931 if (rename(tmpname
, fname
) == -1) {
932 DEBUG(0,("create_local_private_krb5_conf_for_domain: rename "
933 "of %s to %s failed. Errno %s\n",
934 tmpname
, fname
, strerror(errno
) ));
939 DEBUG(5,("create_local_private_krb5_conf_for_domain: wrote "
940 "file %s with realm %s KDC list = %s\n",
941 fname
, realm_upper
, kdc_ip_string
));
943 /* Set the environment variable to this file. */
944 setenv("KRB5_CONFIG", fname
, 1);
948 #if defined(OVERWRITE_SYSTEM_KRB5_CONF)
950 #define SYSTEM_KRB5_CONF_PATH "/etc/krb5.conf"
951 /* Insanity, sheer insanity..... */
953 if (strequal(realm
, lp_realm())) {
954 char linkpath
[PATH_MAX
+1];
957 lret
= readlink(SYSTEM_KRB5_CONF_PATH
, linkpath
, sizeof(linkpath
)-1);
959 linkpath
[lret
] = '\0';
962 if (lret
!= -1 || strcmp(linkpath
, fname
) == 0) {
963 /* Symlink already exists. */
967 /* Try and replace with a symlink. */
968 if (symlink(fname
, SYSTEM_KRB5_CONF_PATH
) == -1) {
969 const char *newpath
= SYSTEM_KRB5_CONF_PATH
## ".saved";
970 if (errno
!= EEXIST
) {
971 DEBUG(0,("create_local_private_krb5_conf_for_domain: symlink "
972 "of %s to %s failed. Errno %s\n",
973 fname
, SYSTEM_KRB5_CONF_PATH
, strerror(errno
) ));
974 goto done
; /* Not a fatal error. */
977 /* Yes, this is a race conditon... too bad. */
978 if (rename(SYSTEM_KRB5_CONF_PATH
, newpath
) == -1) {
979 DEBUG(0,("create_local_private_krb5_conf_for_domain: rename "
980 "of %s to %s failed. Errno %s\n",
981 SYSTEM_KRB5_CONF_PATH
, newpath
,
983 goto done
; /* Not a fatal error. */
986 if (symlink(fname
, SYSTEM_KRB5_CONF_PATH
) == -1) {
987 DEBUG(0,("create_local_private_krb5_conf_for_domain: "
988 "forced symlink of %s to /etc/krb5.conf failed. Errno %s\n",
989 fname
, strerror(errno
) ));
990 goto done
; /* Not a fatal error. */
997 TALLOC_FREE(tmpname
);