1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* Many thanks to Stuart Lynne for contributing the original code for this
9 driver. Further contibutions from Michael Haardt, Brian Candler, Barry
10 Pederson, Peter Savitch and Christian Kellner. Particular thanks to Brian for
11 researching how to handle the different kinds of error. */
15 #include "lf_functions.h"
18 /* Include LDAP headers. The code below uses some "old" LDAP interfaces that
19 are deprecated in OpenLDAP. I don't know their status in other LDAP
20 implementations. LDAP_DEPRECATED causes their prototypes to be defined in
23 #define LDAP_DEPRECATED 1
29 /* Annoyingly, the different LDAP libraries handle errors in different ways,
30 and some other things too. There doesn't seem to be an automatic way of
31 distinguishing between them. Local/Makefile should contain a setting of
32 LDAP_LIB_TYPE, which in turn causes appropriate macros to be defined for the
33 different kinds. Those that matter are:
36 LDAP_LIB_SOLARIS with synonym LDAP_LIB_SOLARIS7
39 These others may be defined, but are in fact the default, so are not tested:
45 #if defined(LDAP_LIB_SOLARIS7) && ! defined(LDAP_LIB_SOLARIS)
46 #define LDAP_LIB_SOLARIS
50 /* Just in case LDAP_NO_LIMIT is not defined by some of these libraries. */
53 #define LDAP_NO_LIMIT 0
57 /* Just in case LDAP_DEREF_NEVER is not defined */
59 #ifndef LDAP_DEREF_NEVER
60 #define LDAP_DEREF_NEVER 0
64 /* Four types of LDAP search are implemented */
66 #define SEARCH_LDAP_MULTIPLE 0 /* Get attributes from multiple entries */
67 #define SEARCH_LDAP_SINGLE 1 /* Get attributes from one entry only */
68 #define SEARCH_LDAP_DN 2 /* Get just the DN from one entry */
69 #define SEARCH_LDAP_AUTH 3 /* Just checking for authentication */
71 /* In all 4 cases, the DN is left in $ldap_dn (which post-dates the
72 SEARCH_LDAP_DN lookup). */
75 /* Structure and anchor for caching connections. */
77 typedef struct ldap_connection {
78 struct ldap_connection *next;
84 BOOL is_start_tls_called;
88 static LDAP_CONNECTION *ldap_connections = NULL;
92 /*************************************************
93 * Internal search function *
94 *************************************************/
96 /* This is the function that actually does the work. It is called (indirectly
97 via control_ldap_search) from eldap_find(), eldapauth_find(), eldapdn_find(),
98 and eldapm_find(), with a difference in the "search_type" argument.
100 The case of eldapauth_find() is special in that all it does is do
101 authentication, returning OK or FAIL as appropriate. This isn't used as a
102 lookup. Instead, it is called from expand.c as an expansion condition test.
104 The DN from a successful lookup is placed in $ldap_dn. This feature postdates
105 the provision of the SEARCH_LDAP_DN facility for returning just the DN as the
109 ldap_url the URL to be looked up
110 server server host name, when URL contains none
111 s_port server port, used when URL contains no name
112 search_type SEARCH_LDAP_MULTIPLE allows values from multiple entries
113 SEARCH_LDAP_SINGLE allows values from one entry only
114 SEARCH_LDAP_DN gets the DN from one entry
115 res set to point at the result (not used for ldapauth)
116 errmsg set to point a message if result is not OK
117 defer_break set TRUE if no more servers to be tried after a DEFER
118 user user name for authentication, or NULL
119 password password for authentication, or NULL
120 sizelimit max number of entries returned, or 0 for no limit
121 timelimit max time to wait, or 0 for no limit
122 tcplimit max time for network activity, e.g. connect, or 0 for OS default
123 deference the dereference option, which is one of
124 LDAP_DEREF_{NEVER,SEARCHING,FINDING,ALWAYS}
125 referrals the referral option, which is LDAP_OPT_ON or LDAP_OPT_OFF
127 Returns: OK or FAIL or DEFER
128 FAIL is given only if a lookup was performed successfully, but
133 perform_ldap_search(const uschar *ldap_url, uschar *server, int s_port,
134 int search_type, uschar **res, uschar **errmsg, BOOL *defer_break,
135 uschar *user, uschar *password, int sizelimit, int timelimit, int tcplimit,
136 int dereference, void *referrals)
138 LDAPURLDesc *ludp = NULL;
139 LDAPMessage *result = NULL;
141 LDAP_CONNECTION *lcp;
143 struct timeval timeout;
144 struct timeval *timeoutptr = NULL;
155 uschar *error1 = NULL; /* string representation of errcode (static) */
156 uschar *error2 = NULL; /* error message from the server */
157 uschar *matched = NULL; /* partially matched DN */
159 int attrs_requested = 0;
160 int error_yield = DEFER;
162 int rc, ldap_rc, ldap_parse_rc;
167 BOOL attribute_found = FALSE;
171 debug_printf("perform_ldap_search: ldap%s URL = \"%s\" server=%s port=%d "
172 "sizelimit=%d timelimit=%d tcplimit=%d\n",
173 (search_type == SEARCH_LDAP_MULTIPLE)? "m" :
174 (search_type == SEARCH_LDAP_DN)? "dn" :
175 (search_type == SEARCH_LDAP_AUTH)? "auth" : "",
176 ldap_url, server, s_port, sizelimit, timelimit, tcplimit);
178 /* Check if LDAP thinks the URL is a valid LDAP URL. We assume that if the LDAP
179 library that is in use doesn't recognize, say, "ldapi", it will barf here. */
181 if (!ldap_is_ldap_url(CS ldap_url))
183 *errmsg = string_sprintf("ldap_is_ldap_url: not an LDAP url \"%s\"\n",
185 goto RETURN_ERROR_BREAK;
190 if ((rc = ldap_url_parse(CS ldap_url, &ludp)) != 0)
192 *errmsg = string_sprintf("ldap_url_parse: (error %d) parsing \"%s\"\n", rc,
194 goto RETURN_ERROR_BREAK;
197 /* If the host name is empty, take it from the separate argument, if one is
198 given. OpenLDAP 2.0.6 sets an unset hostname to "" rather than empty, but
199 expects NULL later in ldap_init() to mean "default", annoyingly. In OpenLDAP
200 2.0.11 this has changed (it uses NULL). */
202 if ((ludp->lud_host == NULL || ludp->lud_host[0] == 0) && server != NULL)
209 host = US ludp->lud_host;
210 if (host != NULL && host[0] == 0) host = NULL;
211 port = ludp->lud_port;
214 DEBUG(D_lookup) debug_printf("after ldap_url_parse: host=%s port=%d\n",
217 if (port == 0) port = LDAP_PORT; /* Default if none given */
218 sprintf(CS porttext, ":%d", port); /* For messages */
220 /* If the "host name" is actually a path, we are going to connect using a Unix
221 socket, regardless of whether "ldapi" was actually specified or not. This means
222 that a Unix socket can be declared in eldap_default_servers, and "traditional"
223 LDAP queries using just "ldap" can be used ("ldaps" is similarly overridden).
224 The path may start with "/" or it may already be escaped as "%2F" if it was
225 actually declared that way in eldap_default_servers. (I did it that way the
226 first time.) If the host name is not a path, the use of "ldapi" causes an
227 error, except in the default case. (But lud_scheme doesn't seem to exist in
232 if ((host[0] == '/' || Ustrncmp(host, "%2F", 3) == 0))
235 porttext[0] = 0; /* Remove port from messages */
238 #if defined LDAP_LIB_OPENLDAP2
239 else if (strncmp(ludp->lud_scheme, "ldapi", 5) == 0)
241 *errmsg = string_sprintf("ldapi requires an absolute path (\"%s\" given)",
248 /* Count the attributes; we need this later to tell us how to format results */
250 for (attrp = USS ludp->lud_attrs; attrp != NULL && *attrp != NULL; attrp++)
253 /* See if we can find a cached connection to this host. The port is not
254 relevant for ldapi. The host name pointer is set to NULL if no host was given
255 (implying the library default), rather than to the empty string. Note that in
256 this case, there is no difference between ldap and ldapi. */
258 for (lcp = ldap_connections; lcp != NULL; lcp = lcp->next)
260 if ((host == NULL) != (lcp->host == NULL) ||
261 (host != NULL && strcmpic(lcp->host, host) != 0))
263 if (ldapi || port == lcp->port) break;
266 /* Use this network timeout in any requests. */
270 timeout.tv_sec = tcplimit;
272 timeoutptr = &timeout;
275 /* If no cached connection found, we must open a connection to the server. If
276 the server name is actually an absolute path, we set ldapi=TRUE above. This
277 requests connection via a Unix socket. However, as far as I know, only OpenLDAP
278 supports the use of sockets, and the use of ldap_initialize(). */
284 #ifdef LDAP_OPT_X_TLS_NEWCTX
288 LDAP *ldsetctx = NULL;
292 /* --------------------------- OpenLDAP ------------------------ */
294 /* There seems to be a preference under OpenLDAP for ldap_initialize()
295 instead of ldap_init(), though I have as yet been unable to find
296 documentation that says this. (OpenLDAP documentation is sparse to
297 non-existent). So we handle OpenLDAP differently here. Also, support for
298 ldapi seems to be OpenLDAP-only at present. */
300 #ifdef LDAP_LIB_OPENLDAP2
302 /* We now need an empty string for the default host. Get some store in which
303 to build a URL for ldap_initialize(). In the ldapi case, it can't be bigger
304 than (9 + 3*Ustrlen(shost)), whereas in the other cases it can't be bigger
305 than the host name + "ldaps:///" plus : and a port number, say 20 + the
306 length of the host name. What we get should accommodate both, easily. */
308 uschar *shost = (host == NULL)? US"" : host;
309 uschar *init_url = store_get(20 + 3 * Ustrlen(shost));
312 /* Handle connection via Unix socket ("ldapi"). We build a basic LDAP URI to
313 contain the path name, with slashes escaped as %2F. */
318 init_ptr = init_url + 8;
319 Ustrcpy(init_url, "ldapi://");
320 while ((ch = *shost++) != 0)
324 Ustrncpy(init_ptr, "%2F", 3);
327 else *init_ptr++ = ch;
332 /* This is not an ldapi call. Just build a URI with the protocol type, host
337 init_ptr = Ustrchr(ldap_url, '/');
338 Ustrncpy(init_url, ldap_url, init_ptr - ldap_url);
339 init_ptr = init_url + (init_ptr - ldap_url);
340 sprintf(CS init_ptr, "//%s:%d/", shost, port);
343 /* Call ldap_initialize() and check the result */
345 DEBUG(D_lookup) debug_printf("ldap_initialize with URL %s\n", init_url);
346 rc = ldap_initialize(&ld, CS init_url);
347 if (rc != LDAP_SUCCESS)
349 *errmsg = string_sprintf("ldap_initialize: (error %d) URL \"%s\"\n",
353 store_reset(init_url); /* Might as well save memory when we can */
356 /* ------------------------- Not OpenLDAP ---------------------- */
358 /* For libraries other than OpenLDAP, use ldap_init(). */
360 #else /* LDAP_LIB_OPENLDAP2 */
361 ld = ldap_init(CS host, port);
362 #endif /* LDAP_LIB_OPENLDAP2 */
364 /* -------------------------------------------------------------- */
367 /* Handle failure to initialize */
371 *errmsg = string_sprintf("failed to initialize for LDAP server %s%s - %s",
372 host, porttext, strerror(errno));
376 #ifdef LDAP_OPT_X_TLS_NEWCTX
380 /* Set the TCP connect time limit if available. This is something that is
381 in Netscape SDK v4.1; I don't know about other libraries. */
383 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT
386 int timeout1000 = tcplimit*1000;
387 ldap_set_option(ld, LDAP_X_OPT_CONNECT_TIMEOUT, (void *)&timeout1000);
391 int notimeout = LDAP_X_IO_TIMEOUT_NO_TIMEOUT;
392 ldap_set_option(ld, LDAP_X_OPT_CONNECT_TIMEOUT, (void *)¬imeout);
396 /* Set the TCP connect timeout. This works with OpenLDAP 2.2.14. */
398 #ifdef LDAP_OPT_NETWORK_TIMEOUT
400 ldap_set_option(ld, LDAP_OPT_NETWORK_TIMEOUT, (void *)timeoutptr);
403 /* I could not get TLS to work until I set the version to 3. That version
404 seems to be the default nowadays. The RFC is dated 1997, so I would hope
405 that all the LDAP libraries support it. Therefore, if eldap_version hasn't
406 been set, go for v3 if we can. */
408 if (eldap_version < 0)
411 eldap_version = LDAP_VERSION3;
417 #ifdef LDAP_OPT_PROTOCOL_VERSION
418 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, (void *)&eldap_version);
421 DEBUG(D_lookup) debug_printf("initialized for LDAP (v%d) server %s%s\n",
422 eldap_version, host, porttext);
424 /* If not using ldapi and TLS is available, set appropriate TLS options: hard
425 for "ldaps" and soft otherwise. */
427 #ifdef LDAP_OPT_X_TLS
431 #ifdef LDAP_OPT_X_TLS_REQUIRE_CERT
432 if (eldap_require_cert != NULL)
434 tls_option = LDAP_OPT_X_TLS_NEVER;
435 if (Ustrcmp(eldap_require_cert, "hard") == 0)
437 tls_option = LDAP_OPT_X_TLS_HARD;
439 else if (Ustrcmp(eldap_require_cert, "demand") == 0)
441 tls_option = LDAP_OPT_X_TLS_DEMAND;
443 else if (Ustrcmp(eldap_require_cert, "allow") == 0)
445 tls_option = LDAP_OPT_X_TLS_ALLOW;
447 else if (Ustrcmp(eldap_require_cert, "try") == 0)
449 tls_option = LDAP_OPT_X_TLS_TRY;
452 debug_printf("Require certificate overrides LDAP_OPT_X_TLS option (%d)\n",
456 #endif /* LDAP_OPT_X_TLS_REQUIRE_CERT */
457 if (strncmp(ludp->lud_scheme, "ldaps", 5) == 0)
459 tls_option = LDAP_OPT_X_TLS_HARD;
461 debug_printf("LDAP_OPT_X_TLS_HARD set due to ldaps:// URI\n");
465 tls_option = LDAP_OPT_X_TLS_TRY;
467 debug_printf("LDAP_OPT_X_TLS_TRY set due to ldap:// URI\n");
469 ldap_set_option(ld, LDAP_OPT_X_TLS, (void *)&tls_option);
471 #endif /* LDAP_OPT_X_TLS */
473 #ifdef LDAP_OPT_X_TLS_CACERTFILE
474 if (eldap_ca_cert_file != NULL)
476 ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_CACERTFILE, eldap_ca_cert_file);
479 #ifdef LDAP_OPT_X_TLS_CACERTDIR
480 if (eldap_ca_cert_dir != NULL)
482 ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_CACERTDIR, eldap_ca_cert_dir);
485 #ifdef LDAP_OPT_X_TLS_CERTFILE
486 if (eldap_cert_file != NULL)
488 ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_CERTFILE, eldap_cert_file);
491 #ifdef LDAP_OPT_X_TLS_KEYFILE
492 if (eldap_cert_key != NULL)
494 ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_KEYFILE, eldap_cert_key);
497 #ifdef LDAP_OPT_X_TLS_CIPHER_SUITE
498 if (eldap_cipher_suite != NULL)
500 ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_CIPHER_SUITE, eldap_cipher_suite);
503 #ifdef LDAP_OPT_X_TLS_REQUIRE_CERT
504 if (eldap_require_cert != NULL)
506 int cert_option = LDAP_OPT_X_TLS_NEVER;
507 if (Ustrcmp(eldap_require_cert, "hard") == 0)
509 cert_option = LDAP_OPT_X_TLS_HARD;
511 else if (Ustrcmp(eldap_require_cert, "demand") == 0)
513 cert_option = LDAP_OPT_X_TLS_DEMAND;
515 else if (Ustrcmp(eldap_require_cert, "allow") == 0)
517 cert_option = LDAP_OPT_X_TLS_ALLOW;
519 else if (Ustrcmp(eldap_require_cert, "try") == 0)
521 cert_option = LDAP_OPT_X_TLS_TRY;
523 /* This ldap handle is set at compile time based on client libs. Older
524 * versions want it to be global and newer versions can force a reload
525 * of the TLS context (to reload these settings we are changing from the
526 * default that loaded at instantiation). */
527 rc = ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_REQUIRE_CERT, &cert_option);
531 debug_printf("Unable to set TLS require cert_option(%d) globally: %s\n",
532 cert_option, ldap_err2string(rc));
536 #ifdef LDAP_OPT_X_TLS_NEWCTX
537 rc = ldap_set_option(ldsetctx, LDAP_OPT_X_TLS_NEWCTX, &am_server);
541 debug_printf("Unable to reload TLS context %d: %s\n",
542 rc, ldap_err2string(rc));
546 /* Now add this connection to the chain of cached connections */
548 lcp = store_get(sizeof(LDAP_CONNECTION));
549 lcp->host = (host == NULL)? NULL : string_copy(host);
552 lcp->password = NULL;
555 lcp->next = ldap_connections;
556 lcp->is_start_tls_called = FALSE;
557 ldap_connections = lcp;
560 /* Found cached connection */
565 debug_printf("re-using cached connection to LDAP server %s%s\n",
569 /* Bind with the user/password supplied, or an anonymous bind if these values
570 are NULL, unless a cached connection is already bound with the same values. */
573 (lcp->user == NULL && user != NULL) ||
574 (lcp->user != NULL && user == NULL) ||
575 (lcp->user != NULL && user != NULL && Ustrcmp(lcp->user, user) != 0) ||
576 (lcp->password == NULL && password != NULL) ||
577 (lcp->password != NULL && password == NULL) ||
578 (lcp->password != NULL && password != NULL &&
579 Ustrcmp(lcp->password, password) != 0))
581 DEBUG(D_lookup) debug_printf("%sbinding with user=%s password=%s\n",
582 (lcp->bound)? "re-" : "", user, password);
583 if (eldap_start_tls && !lcp->is_start_tls_called)
585 #if defined(LDAP_OPT_X_TLS) && !defined(LDAP_LIB_SOLARIS)
586 /* The Oracle LDAP libraries (LDAP_LIB_TYPE=SOLARIS) don't support this.
587 * Note: moreover, they appear to now define LDAP_OPT_X_TLS and still not
588 * export an ldap_start_tls_s symbol.
590 if ( (rc = ldap_start_tls_s(lcp->ld, NULL, NULL)) != LDAP_SUCCESS)
592 *errmsg = string_sprintf("failed to initiate TLS processing on an "
593 "LDAP session to server %s%s - ldap_start_tls_s() returned %d:"
594 " %s", host, porttext, rc, ldap_err2string(rc));
597 lcp->is_start_tls_called = TRUE;
600 debug_printf("TLS initiation not supported with this Exim and your LDAP library.\n");
603 if ((msgid = ldap_bind(lcp->ld, CS user, CS password, LDAP_AUTH_SIMPLE))
606 *errmsg = string_sprintf("failed to bind the LDAP connection to server "
607 "%s%s - ldap_bind() returned -1", host, porttext);
611 if ((rc = ldap_result( lcp->ld, msgid, 1, timeoutptr, &result )) <= 0)
613 *errmsg = string_sprintf("failed to bind the LDAP connection to server "
614 "%s%s - LDAP error: %s", host, porttext,
615 rc == -1 ? "result retrieval failed" : "timeout" );
620 rc = ldap_result2error( lcp->ld, result, 0 );
622 /* Invalid credentials when just checking credentials returns FAIL. This
623 stops any further servers being tried. */
625 if (search_type == SEARCH_LDAP_AUTH && rc == LDAP_INVALID_CREDENTIALS)
628 debug_printf("Invalid credentials: ldapauth returns FAIL\n");
630 goto RETURN_ERROR_NOMSG;
633 /* Otherwise we have a problem that doesn't stop further servers from being
636 if (rc != LDAP_SUCCESS)
638 *errmsg = string_sprintf("failed to bind the LDAP connection to server "
639 "%s%s - LDAP error %d: %s", host, porttext, rc, ldap_err2string(rc));
643 /* Successful bind */
646 lcp->user = (user == NULL)? NULL : string_copy(user);
647 lcp->password = (password == NULL)? NULL : string_copy(password);
649 ldap_msgfree(result);
653 /* If we are just checking credentials, return OK. */
655 if (search_type == SEARCH_LDAP_AUTH)
657 DEBUG(D_lookup) debug_printf("Bind succeeded: ldapauth returns OK\n");
661 /* Before doing the search, set the time and size limits (if given). Here again
662 the different implementations of LDAP have chosen to do things differently. */
664 #if defined(LDAP_OPT_SIZELIMIT)
665 ldap_set_option(lcp->ld, LDAP_OPT_SIZELIMIT, (void *)&sizelimit);
666 ldap_set_option(lcp->ld, LDAP_OPT_TIMELIMIT, (void *)&timelimit);
668 lcp->ld->ld_sizelimit = sizelimit;
669 lcp->ld->ld_timelimit = timelimit;
672 /* Similarly for dereferencing aliases. Don't know if this is possible on
673 an LDAP library without LDAP_OPT_DEREF. */
675 #if defined(LDAP_OPT_DEREF)
676 ldap_set_option(lcp->ld, LDAP_OPT_DEREF, (void *)&dereference);
679 /* Similarly for the referral setting; should the library follow referrals that
680 the LDAP server returns? The conditional is just in case someone uses a library
683 #if defined(LDAP_OPT_REFERRALS)
684 ldap_set_option(lcp->ld, LDAP_OPT_REFERRALS, referrals);
687 /* Start the search on the server. */
689 DEBUG(D_lookup) debug_printf("Start search\n");
691 msgid = ldap_search(lcp->ld, ludp->lud_dn, ludp->lud_scope, ludp->lud_filter,
696 #if defined LDAP_LIB_SOLARIS || defined LDAP_LIB_OPENLDAP2
698 ldap_get_option(lcp->ld, LDAP_OPT_ERROR_NUMBER, &err);
699 *errmsg = string_sprintf("ldap_search failed: %d, %s", err,
700 ldap_err2string(err));
703 *errmsg = string_sprintf("ldap_search failed");
709 /* Loop to pick up results as they come in, setting a timeout if one was
712 while ((rc = ldap_result(lcp->ld, msgid, 0, timeoutptr, &result)) ==
713 LDAP_RES_SEARCH_ENTRY)
717 DEBUG(D_lookup) debug_printf("ldap_result loop\n");
719 for(e = ldap_first_entry(lcp->ld, result);
721 e = ldap_next_entry(lcp->ld, e))
724 BOOL insert_space = FALSE;
726 DEBUG(D_lookup) debug_printf("LDAP entry loop\n");
728 rescount++; /* Count results */
730 /* Results for multiple entries values are separated by newlines. */
732 if (data != NULL) data = string_cat(data, &size, &ptr, US"\n", 1);
734 /* Get the DN from the last result. */
736 new_dn = US ldap_get_dn(lcp->ld, e);
741 #if defined LDAP_LIB_NETSCAPE || defined LDAP_LIB_OPENLDAP2
743 #else /* OPENLDAP 1, UMich, Solaris */
751 /* If the data we want is actually the DN rather than any attribute values,
752 (an "ldapdn" search) add it to the data string. If there are multiple
753 entries, the DNs will be concatenated, but we test for this case below, as
754 for SEARCH_LDAP_SINGLE, and give an error. */
756 if (search_type == SEARCH_LDAP_DN) /* Do not amalgamate these into one */
757 { /* condition, because of the else */
758 if (new_dn != NULL) /* below, that's for the first only */
760 data = string_cat(data, &size, &ptr, new_dn, Ustrlen(new_dn));
762 attribute_found = TRUE;
766 /* Otherwise, loop through the entry, grabbing attribute values. If there's
767 only one attribute being retrieved, no attribute name is given, and the
768 result is not quoted. Multiple values are separated by (comma).
769 If more than one attribute is being retrieved, the data is given as a
770 sequence of name=value pairs, separated by (space), with the value always in quotes.
771 If there are multiple values, they are given within the quotes, comma separated. */
773 else for (attr = US ldap_first_attribute(lcp->ld, e, &ber);
775 attr = US ldap_next_attribute(lcp->ld, e, ber))
779 /* Get array of values for this attribute. */
781 if ((firstval = values = USS ldap_get_values(lcp->ld, e, CS attr))
785 if (attrs_requested != 1)
788 data = string_cat(data, &size, &ptr, US" ", 1);
791 data = string_cat(data, &size, &ptr, attr, Ustrlen(attr));
792 data = string_cat(data, &size, &ptr, US"=\"", 2);
795 while (*values != NULL)
797 uschar *value = *values;
798 int len = Ustrlen(value);
800 DEBUG(D_lookup) debug_printf("LDAP attr loop %s:%s\n", attr, value);
802 /* In case we requested one attribute only but got
803 * several times into that attr loop, we need to append
804 * the additional values. (This may happen if you derive
805 * attributeTypes B and C from A and then query for A.)
806 * In all other cases we detect the different attribute
807 * and append only every non first value. */
808 if ((attr_count == 1 && data) || (values != firstval))
809 data = string_cat(data, &size, &ptr, US",", 1);
811 /* For multiple attributes, the data is in quotes. We must escape
812 internal quotes, backslashes, newlines, and must double commas. */
814 if (attrs_requested != 1)
817 for (j = 0; j < len; j++)
819 if (value[j] == '\n')
820 data = string_cat(data, &size, &ptr, US"\\n", 2);
821 else if (value[j] == ',')
822 data = string_cat(data, &size, &ptr, US",,", 2);
825 if (value[j] == '\"' || value[j] == '\\')
826 data = string_cat(data, &size, &ptr, US"\\", 1);
827 data = string_cat(data, &size, &ptr, value+j, 1);
832 /* For single attributes, just double commas */
837 for (j = 0; j < len; j++)
840 data = string_cat(data, &size, &ptr, US",,", 2);
842 data = string_cat(data, &size, &ptr, value+j, 1);
847 /* Move on to the next value */
850 attribute_found = TRUE;
853 /* Closing quote at the end of the data for a named attribute. */
855 if (attrs_requested != 1)
856 data = string_cat(data, &size, &ptr, US"\"", 1);
858 /* Free the values */
860 ldap_value_free(CSS firstval);
864 #if defined LDAP_LIB_NETSCAPE || defined LDAP_LIB_OPENLDAP2
866 /* Netscape and OpenLDAP2 LDAP's attrs are dynamically allocated and need
867 to be freed. UMich LDAP stores them in static storage and does not require
872 } /* End "for" loop for extracting attributes from an entry */
873 } /* End "for" loop for extracting entries from a result */
875 /* Free the result */
877 ldap_msgfree(result);
879 } /* End "while" loop for multiple results */
881 /* Terminate the dynamic string that we have built and reclaim unused store */
886 store_reset(data + ptr + 1);
889 /* Copy the last dn into eldap_dn */
893 eldap_dn = string_copy(dn);
894 #if defined LDAP_LIB_NETSCAPE || defined LDAP_LIB_OPENLDAP2
896 #else /* OPENLDAP 1, UMich, Solaris */
901 DEBUG(D_lookup) debug_printf("search ended by ldap_result yielding %d\n",rc);
905 *errmsg = US"ldap_result timed out";
909 /* A return code of -1 seems to mean "ldap_result failed internally or couldn't
910 provide you with a message". Other error states seem to exist where
911 ldap_result() didn't give us any message from the server at all, leaving result
912 set to NULL. Apparently, "the error parameters of the LDAP session handle will
913 be set accordingly". That's the best we can do to retrieve an error status; we
914 can't use functions like ldap_result2error because they parse a message from
915 the server, which we didn't get.
917 Annoyingly, the different implementations of LDAP have gone for different
918 methods of handling error codes and generating error messages. */
920 if (rc == -1 || result == NULL)
923 DEBUG(D_lookup) debug_printf("ldap_result failed\n");
925 #if defined LDAP_LIB_SOLARIS || defined LDAP_LIB_OPENLDAP2
926 ldap_get_option(lcp->ld, LDAP_OPT_ERROR_NUMBER, &err);
927 *errmsg = string_sprintf("ldap_result failed: %d, %s",
928 err, ldap_err2string(err));
930 #elif defined LDAP_LIB_NETSCAPE
931 /* Dubious (surely 'matched' is spurious here?) */
932 (void)ldap_get_lderrno(lcp->ld, &matched, &error1);
933 *errmsg = string_sprintf("ldap_result failed: %s (%s)", error1, matched);
935 #else /* UMich LDAP aka OpenLDAP 1.x */
936 *errmsg = string_sprintf("ldap_result failed: %d, %s",
937 lcp->ld->ld_errno, ldap_err2string(lcp->ld->ld_errno));
943 /* A return code that isn't -1 doesn't necessarily mean there were no problems
944 with the search. The message must be an LDAP_RES_SEARCH_RESULT or
945 LDAP_RES_SEARCH_REFERENCE or else it's something we can't handle. Some versions
946 of LDAP do not define LDAP_RES_SEARCH_REFERENCE (LDAP v1 is one, it seems). So
947 we don't provide that functionality when we can't. :-) */
949 if (rc != LDAP_RES_SEARCH_RESULT
950 #ifdef LDAP_RES_SEARCH_REFERENCE
951 && rc != LDAP_RES_SEARCH_REFERENCE
955 *errmsg = string_sprintf("ldap_result returned unexpected code %d", rc);
959 /* We have a result message from the server. This doesn't yet mean all is well.
960 We need to parse the message to find out exactly what's happened. */
962 #if defined LDAP_LIB_SOLARIS || defined LDAP_LIB_OPENLDAP2
964 ldap_parse_rc = ldap_parse_result(lcp->ld, result, &rc, CSS &matched,
965 CSS &error2, NULL, NULL, 0);
966 DEBUG(D_lookup) debug_printf("ldap_parse_result: %d\n", ldap_parse_rc);
967 if (ldap_parse_rc < 0 &&
968 (ldap_parse_rc != LDAP_NO_RESULTS_RETURNED
969 #ifdef LDAP_RES_SEARCH_REFERENCE
970 || ldap_rc != LDAP_RES_SEARCH_REFERENCE
974 *errmsg = string_sprintf("ldap_parse_result failed %d", ldap_parse_rc);
977 error1 = US ldap_err2string(rc);
979 #elif defined LDAP_LIB_NETSCAPE
980 /* Dubious (it doesn't reference 'result' at all!) */
981 rc = ldap_get_lderrno(lcp->ld, &matched, &error1);
983 #else /* UMich LDAP aka OpenLDAP 1.x */
984 rc = ldap_result2error(lcp->ld, result, 0);
985 error1 = ldap_err2string(rc);
986 error2 = lcp->ld->ld_error;
987 matched = lcp->ld->ld_matched;
990 /* Process the status as follows:
992 (1) If we get LDAP_SIZELIMIT_EXCEEDED, just carry on, to return the
993 truncated result list.
995 (2) If we get LDAP_RES_SEARCH_REFERENCE, also just carry on. This was a
996 submitted patch that is reported to "do the right thing" with Solaris
997 LDAP libraries. (The problem it addresses apparently does not occur with
1000 (3) The range of errors defined by LDAP_NAME_ERROR generally mean "that
1001 object does not, or cannot, exist in the database". For those cases we
1004 (4) All other non-successes here are treated as some kind of problem with
1005 the lookup, so return DEFER (which is the default in error_yield).
1008 DEBUG(D_lookup) debug_printf("ldap_parse_result yielded %d: %s\n",
1009 rc, ldap_err2string(rc));
1011 if (rc != LDAP_SUCCESS && rc != LDAP_SIZELIMIT_EXCEEDED
1012 #ifdef LDAP_RES_SEARCH_REFERENCE
1013 && rc != LDAP_RES_SEARCH_REFERENCE
1017 *errmsg = string_sprintf("LDAP search failed - error %d: %s%s%s%s%s",
1019 (error1 != NULL)? error1 : US"",
1020 (error2 != NULL && error2[0] != 0)? US"/" : US"",
1021 (error2 != NULL)? error2 : US"",
1022 (matched != NULL && matched[0] != 0)? US"/" : US"",
1023 (matched != NULL)? matched : US"");
1025 #if defined LDAP_NAME_ERROR
1026 if (LDAP_NAME_ERROR(rc))
1027 #elif defined NAME_ERROR /* OPENLDAP1 calls it this */
1030 if (rc == LDAP_NO_SUCH_OBJECT)
1034 DEBUG(D_lookup) debug_printf("lookup failure forced\n");
1040 /* The search succeeded. Check if we have too many results */
1042 if (search_type != SEARCH_LDAP_MULTIPLE && rescount > 1)
1044 *errmsg = string_sprintf("LDAP search: more than one entry (%d) was returned "
1045 "(filter not specific enough?)", rescount);
1046 goto RETURN_ERROR_BREAK;
1049 /* Check if we have too few (zero) entries */
1053 *errmsg = string_sprintf("LDAP search: no results");
1055 goto RETURN_ERROR_BREAK;
1058 /* If an entry was found, but it had no attributes, we behave as if no entries
1059 were found, that is, the lookup failed. */
1061 if (!attribute_found)
1063 *errmsg = US"LDAP search: found no attributes";
1068 /* Otherwise, it's all worked */
1070 DEBUG(D_lookup) debug_printf("LDAP search: returning: %s\n", data);
1074 if (result != NULL) ldap_msgfree(result);
1075 ldap_free_urldesc(ludp);
1081 *defer_break = TRUE;
1084 DEBUG(D_lookup) debug_printf("%s\n", *errmsg);
1087 if (result != NULL) ldap_msgfree(result);
1088 if (ludp != NULL) ldap_free_urldesc(ludp);
1090 #if defined LDAP_LIB_OPENLDAP2
1091 if (error2 != NULL) ldap_memfree(error2);
1092 if (matched != NULL) ldap_memfree(matched);
1100 /*************************************************
1101 * Internal search control function *
1102 *************************************************/
1104 /* This function is called from eldap_find(), eldapauth_find(), eldapdn_find(),
1105 and eldapm_find() with a difference in the "search_type" argument. It controls
1106 calls to perform_ldap_search() which actually does the work. We call that
1107 repeatedly for certain types of defer in the case when the URL contains no host
1108 name and eldap_default_servers is set to a list of servers to try. This gives
1109 more control than just passing over a list of hosts to ldap_open() because it
1110 handles other kinds of defer as well as just a failure to open. Note that the
1111 URL is defined to contain either zero or one "hostport" only.
1113 Parameter data in addition to the URL can be passed as preceding text in the
1114 string, as items of the form XXX=yyy. The URL itself can be detected because it
1115 must begin "ldapx://", where x is empty, s, or i.
1118 ldap_url the URL to be looked up, optionally preceded by other parameter
1120 search_type SEARCH_LDAP_MULTIPLE allows values from multiple entries
1121 SEARCH_LDAP_SINGLE allows values from one entry only
1122 SEARCH_LDAP_DN gets the DN from one entry
1123 res set to point at the result
1124 errmsg set to point a message if result is not OK
1126 Returns: OK or FAIL or DEFER
1130 control_ldap_search(const uschar *ldap_url, int search_type, uschar **res,
1133 BOOL defer_break = FALSE;
1134 int timelimit = LDAP_NO_LIMIT;
1135 int sizelimit = LDAP_NO_LIMIT;
1138 int dereference = LDAP_DEREF_NEVER;
1139 void* referrals = LDAP_OPT_ON;
1140 const uschar *url = ldap_url;
1142 uschar *user = NULL;
1143 uschar *password = NULL;
1144 uschar *local_servers = NULL;
1149 while (isspace(*url)) url++;
1151 /* Until the string begins "ldap", search for the other parameter settings that
1152 are recognized. They are of the form NAME=VALUE, with the value being
1153 optionally double-quoted. There must still be a space after it, however. No
1154 NAME has the value "ldap". */
1156 while (strncmpic(url, US"ldap", 4) != 0)
1158 const uschar *name = url;
1159 while (*url != 0 && *url != '=') url++;
1164 namelen = ++url - name;
1165 value = string_dequote(&url);
1168 if (strncmpic(name, US"USER=", namelen) == 0) user = value;
1169 else if (strncmpic(name, US"PASS=", namelen) == 0) password = value;
1170 else if (strncmpic(name, US"SIZE=", namelen) == 0) sizelimit = Uatoi(value);
1171 else if (strncmpic(name, US"TIME=", namelen) == 0) timelimit = Uatoi(value);
1172 else if (strncmpic(name, US"CONNECT=", namelen) == 0) tcplimit = Uatoi(value);
1173 else if (strncmpic(name, US"NETTIME=", namelen) == 0) tcplimit = Uatoi(value);
1174 else if (strncmpic(name, US"SERVERS=", namelen) == 0) local_servers = value;
1176 /* Don't know if all LDAP libraries have LDAP_OPT_DEREF */
1178 #ifdef LDAP_OPT_DEREF
1179 else if (strncmpic(name, US"DEREFERENCE=", namelen) == 0)
1181 if (strcmpic(value, US"never") == 0) dereference = LDAP_DEREF_NEVER;
1182 else if (strcmpic(value, US"searching") == 0)
1183 dereference = LDAP_DEREF_SEARCHING;
1184 else if (strcmpic(value, US"finding") == 0)
1185 dereference = LDAP_DEREF_FINDING;
1186 if (strcmpic(value, US"always") == 0) dereference = LDAP_DEREF_ALWAYS;
1189 else if (strncmpic(name, US"DEREFERENCE=", namelen) == 0)
1191 *errmsg = string_sprintf("LDAP_OP_DEREF not defined in this LDAP "
1192 "library - cannot use \"dereference\"");
1193 DEBUG(D_lookup) debug_printf("%s\n", *errmsg);
1198 #ifdef LDAP_OPT_REFERRALS
1199 else if (strncmpic(name, US"REFERRALS=", namelen) == 0)
1201 if (strcmpic(value, US"follow") == 0) referrals = LDAP_OPT_ON;
1202 else if (strcmpic(value, US"nofollow") == 0) referrals = LDAP_OPT_OFF;
1205 *errmsg = string_sprintf("LDAP option REFERRALS is not \"follow\" "
1207 DEBUG(D_lookup) debug_printf("%s\n", *errmsg);
1212 else if (strncmpic(name, US"REFERRALS=", namelen) == 0)
1214 *errmsg = string_sprintf("LDAP_OP_REFERRALS not defined in this LDAP "
1215 "library - cannot use \"referrals\"");
1216 DEBUG(D_lookup) debug_printf("%s\n", *errmsg);
1224 string_sprintf("unknown parameter \"%.*s\" precedes LDAP URL",
1226 DEBUG(D_lookup) debug_printf("LDAP query error: %s\n", *errmsg);
1229 while (isspace(*url)) url++;
1233 *errmsg = US"malformed parameter setting precedes LDAP URL";
1234 DEBUG(D_lookup) debug_printf("LDAP query error: %s\n", *errmsg);
1238 /* If user is set, de-URL-quote it. Some LDAP libraries do this for themselves,
1239 but it seems that not all behave like this. The DN for the user is often the
1240 result of ${quote_ldap_dn:...} quoting, which does apply URL quoting, because
1241 that is needed when the DN is used as a base DN in a query. Sigh. This is all
1242 far too complicated. */
1248 for (s = user; *s != 0; s++)
1251 if (*s == '%' && isxdigit(c=s[1]) && isxdigit(d=s[2]))
1256 (((c >= 'a')? (10 + c - 'a') : c - '0') << 4) |
1257 ((d >= 'a')? (10 + d - 'a') : d - '0');
1266 debug_printf("LDAP parameters: user=%s pass=%s size=%d time=%d connect=%d "
1267 "dereference=%d referrals=%s\n", user, password, sizelimit, timelimit,
1268 tcplimit, dereference, (referrals == LDAP_OPT_ON)? "on" : "off");
1270 /* If the request is just to check authentication, some credentials must
1271 be given. The password must not be empty because LDAP binds with an empty
1272 password are considered anonymous, and will succeed on most installations. */
1274 if (search_type == SEARCH_LDAP_AUTH)
1276 if (user == NULL || password == NULL)
1278 *errmsg = US"ldapauth lookups must specify the username and password";
1281 if (password[0] == 0)
1283 DEBUG(D_lookup) debug_printf("Empty password: ldapauth returns FAIL\n");
1288 /* Check for valid ldap url starters */
1291 if (tolower(*p) == 's' || tolower(*p) == 'i') p++;
1292 if (Ustrncmp(p, "://", 3) != 0)
1294 *errmsg = string_sprintf("LDAP URL does not start with \"ldap://\", "
1295 "\"ldaps://\", or \"ldapi://\" (it starts with \"%.16s...\")", url);
1296 DEBUG(D_lookup) debug_printf("LDAP query error: %s\n", *errmsg);
1300 /* No default servers, or URL contains a server name: just one attempt */
1302 if ((eldap_default_servers == NULL && local_servers == NULL) || p[3] != '/')
1304 return perform_ldap_search(url, NULL, 0, search_type, res, errmsg,
1305 &defer_break, user, password, sizelimit, timelimit, tcplimit, dereference,
1309 /* Loop through the default servers until OK or FAIL. Use local_servers list
1310 * if defined in the lookup, otherwise use the global default list */
1311 list = (local_servers == NULL) ? eldap_default_servers : local_servers;
1312 while ((server = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) != NULL)
1316 uschar *colon = Ustrchr(server, ':');
1320 port = Uatoi(colon+1);
1322 rc = perform_ldap_search(url, server, port, search_type, res, errmsg,
1323 &defer_break, user, password, sizelimit, timelimit, tcplimit, dereference,
1325 if (rc != DEFER || defer_break) return rc;
1333 /*************************************************
1334 * Find entry point *
1335 *************************************************/
1337 /* See local README for interface description. The different kinds of search
1338 are handled by a common function, with a flag to differentiate between them.
1339 The handle and filename arguments are not used. */
1342 eldap_find(void *handle, uschar *filename, const uschar *ldap_url, int length,
1343 uschar **result, uschar **errmsg, uint *do_cache)
1345 /* Keep picky compilers happy */
1346 do_cache = do_cache;
1347 return(control_ldap_search(ldap_url, SEARCH_LDAP_SINGLE, result, errmsg));
1351 eldapm_find(void *handle, uschar *filename, const uschar *ldap_url, int length,
1352 uschar **result, uschar **errmsg, uint *do_cache)
1354 /* Keep picky compilers happy */
1355 do_cache = do_cache;
1356 return(control_ldap_search(ldap_url, SEARCH_LDAP_MULTIPLE, result, errmsg));
1360 eldapdn_find(void *handle, uschar *filename, const uschar *ldap_url, int length,
1361 uschar **result, uschar **errmsg, uint *do_cache)
1363 /* Keep picky compilers happy */
1364 do_cache = do_cache;
1365 return(control_ldap_search(ldap_url, SEARCH_LDAP_DN, result, errmsg));
1369 eldapauth_find(void *handle, uschar *filename, const uschar *ldap_url, int length,
1370 uschar **result, uschar **errmsg, uint *do_cache)
1372 /* Keep picky compilers happy */
1373 do_cache = do_cache;
1374 return(control_ldap_search(ldap_url, SEARCH_LDAP_AUTH, result, errmsg));
1379 /*************************************************
1380 * Open entry point *
1381 *************************************************/
1383 /* See local README for interface description. */
1386 eldap_open(uschar *filename, uschar **errmsg)
1388 return (void *)(1); /* Just return something non-null */
1393 /*************************************************
1394 * Tidy entry point *
1395 *************************************************/
1397 /* See local README for interface description.
1398 Make sure that eldap_dn does not refer to reclaimed or worse, freed store */
1403 LDAP_CONNECTION *lcp = NULL;
1406 while ((lcp = ldap_connections) != NULL)
1408 DEBUG(D_lookup) debug_printf("unbind LDAP connection to %s:%d\n", lcp->host,
1410 if(lcp->bound == TRUE)
1411 ldap_unbind(lcp->ld);
1412 ldap_connections = lcp->next;
1418 /*************************************************
1419 * Quote entry point *
1420 *************************************************/
1422 /* LDAP quoting is unbelievably messy. For a start, two different levels of
1423 quoting have to be done: LDAP quoting, and URL quoting. The current
1424 specification is the result of a suggestion by Brian Candler. It recognizes
1427 (1) For text that appears in a search filter, the following escapes are
1428 required (see RFC 2254):
1436 Then the entire filter text must be URL-escaped. This kind of quoting is
1437 implemented by ${quote_ldap:....}. Note that we can never have a NULL
1438 in the input string, because that's a terminator.
1440 (2) For a DN that is part of a URL (i.e. the base DN), the characters
1444 must be quoted by backslashing. See RFC 2253. Leading and trailing spaces
1445 must be escaped, as must a leading #. Then the string must be URL-quoted.
1446 This type of quoting is implemented by ${quote_ldap_dn:....}.
1448 For URL quoting, the only characters that need not be quoted are the
1453 All the others must be hexified and preceded by %. This includes the
1454 backslashes used for LDAP quoting.
1456 For a DN that is given in the USER parameter for authentication, we need the
1457 same initial quoting as (2) but in this case, the result must NOT be
1458 URL-escaped, because it isn't a URL. The way this is handled is by
1459 de-URL-quoting the text when processing the USER parameter in
1460 control_ldap_search() above. That means that the same quote operator can be
1461 used. This has the additional advantage that spaces in the DN won't cause
1462 parsing problems. For example:
1464 USER=cn=${quote_ldap_dn:$1},%20dc=example,%20dc=com
1466 should be safe if there are spaces in $1.
1470 s the string to be quoted
1471 opt additional option text or NULL if none
1472 only "dn" is recognized
1474 Returns: the processed string or NULL for a bad option
1479 /* The characters in this string, together with alphanumerics, never need
1480 quoting in any way. */
1482 #define ALWAYS_LITERAL "!$'-._"
1484 /* The special characters in this string do not need to be URL-quoted. The set
1485 is a bit larger than the general literals. */
1487 #define URL_NONQUOTE ALWAYS_LITERAL "()*+"
1489 /* The following macros define the characters that are quoted by quote_ldap and
1490 quote_ldap_dn, respectively. */
1492 #define LDAP_QUOTE "*()\\"
1493 #define LDAP_DN_QUOTE ",+\"\\<>;"
1498 eldap_quote(uschar *s, uschar *opt)
1507 /* Test for a DN quotation. */
1511 if (Ustrcmp(opt, "dn") != 0) return NULL; /* No others recognized */
1515 /* Compute how much extra store we need for the string. This doesn't have to be
1516 exact as long as it isn't an underestimate. The worst case is the addition of 5
1517 extra bytes for a single character. This occurs for certain characters in DNs,
1518 where, for example, < turns into %5C%3C. For simplicity, we just add 5 for each
1519 possibly escaped character. The really fast way would be just to test for
1520 non-alphanumerics, but it is probably better to spot a few others that are
1521 never escaped, because if there are no specials at all, we can avoid copying
1524 while ((c = *t++) != 0)
1527 if (!isalnum(c) && Ustrchr(ALWAYS_LITERAL, c) == NULL) count += 5;
1529 if (count == 0) return s;
1531 /* Get sufficient store to hold the quoted string */
1533 t = quoted = store_get(len + count + 1);
1535 /* Handle plain quote_ldap */
1539 while ((c = *s++) != 0)
1543 if (Ustrchr(LDAP_QUOTE, c) != NULL)
1545 sprintf(CS t, "%%5C%02X", c); /* e.g. * => %5C2A */
1549 if (Ustrchr(URL_NONQUOTE, c) == NULL) /* e.g. ] => %5D */
1551 sprintf(CS t, "%%%02X", c);
1556 *t++ = c; /* unquoted character */
1560 /* Handle quote_ldap_dn */
1564 uschar *ss = s + len;
1566 /* Find the last char before any trailing spaces */
1568 while (ss > s && ss[-1] == ' ') ss--;
1570 /* Quote leading spaces and sharps */
1574 if (*s != ' ' && *s != '#') break;
1575 sprintf(CS t, "%%5C%%%02X", *s);
1579 /* Handle the rest of the string, up to the trailing spaces */
1586 if (Ustrchr(LDAP_DN_QUOTE, c) != NULL)
1588 Ustrncpy(t, "%5C", 3); /* insert \ where needed */
1589 t += 3; /* fall through to check URL */
1591 if (Ustrchr(URL_NONQUOTE, c) == NULL) /* e.g. ] => %5D */
1593 sprintf(CS t, "%%%02X", c);
1598 *t++ = c; /* unquoted character, or non-URL quoted after %5C */
1601 /* Handle the trailing spaces */
1605 Ustrncpy(t, "%5C%20", 6);
1610 /* Terminate the new string and return */
1618 /*************************************************
1619 * Version reporting entry point *
1620 *************************************************/
1622 /* See local README for interface description. */
1624 #include "../version.h"
1627 ldap_version_report(FILE *f)
1630 fprintf(f, "Library version: LDAP: Exim version %s\n", EXIM_VERSION_STR);
1635 static lookup_info ldap_lookup_info = {
1636 US"ldap", /* lookup name */
1637 lookup_querystyle, /* query-style lookup */
1638 eldap_open, /* open function */
1639 NULL, /* check function */
1640 eldap_find, /* find function */
1641 NULL, /* no close function */
1642 eldap_tidy, /* tidy function */
1643 eldap_quote, /* quoting function */
1644 ldap_version_report /* version reporting */
1647 static lookup_info ldapdn_lookup_info = {
1648 US"ldapdn", /* lookup name */
1649 lookup_querystyle, /* query-style lookup */
1650 eldap_open, /* sic */ /* open function */
1651 NULL, /* check function */
1652 eldapdn_find, /* find function */
1653 NULL, /* no close function */
1654 eldap_tidy, /* sic */ /* tidy function */
1655 eldap_quote, /* sic */ /* quoting function */
1656 NULL /* no version reporting (redundant) */
1659 static lookup_info ldapm_lookup_info = {
1660 US"ldapm", /* lookup name */
1661 lookup_querystyle, /* query-style lookup */
1662 eldap_open, /* sic */ /* open function */
1663 NULL, /* check function */
1664 eldapm_find, /* find function */
1665 NULL, /* no close function */
1666 eldap_tidy, /* sic */ /* tidy function */
1667 eldap_quote, /* sic */ /* quoting function */
1668 NULL /* no version reporting (redundant) */
1672 #define ldap_lookup_module_info _lookup_module_info
1675 static lookup_info *_lookup_list[] = { &ldap_lookup_info, &ldapdn_lookup_info, &ldapm_lookup_info };
1676 lookup_module_info ldap_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 3 };
1678 /* End of lookups/ldap.c */