1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23#include "curl_setup.h"
24
25#if !defined(CURL_DISABLE_LDAP) && !defined(USE_OPENLDAP)
26
27/*
28 * Notice that USE_OPENLDAP is only a source code selection switch. When
29 * libcurl is built with USE_OPENLDAP defined the libcurl source code that
30 * gets compiled is the code from openldap.c, otherwise the code that gets
31 * compiled is the code from ldap.c.
32 *
33 * When USE_OPENLDAP is defined a recent version of the OpenLDAP library
34 * might be required for compilation and runtime. In order to use ancient
35 * OpenLDAP library versions, USE_OPENLDAP shall not be defined.
36 */
37
38#ifdef USE_WIN32_LDAP /* Use Windows LDAP implementation. */
39# include <winldap.h>
40# ifndef LDAP_VENDOR_NAME
41# error Your Platform SDK is NOT sufficient for LDAP support! \
42 Update your Platform SDK, or disable LDAP support!
43# else
44# include <winber.h>
45# endif
46#else
47# define LDAP_DEPRECATED 1 /* Be sure ldap_init() is defined. */
48# ifdef HAVE_LBER_H
49# include <lber.h>
50# endif
51# include <ldap.h>
52# if (defined(HAVE_LDAP_SSL) && defined(HAVE_LDAP_SSL_H))
53# include <ldap_ssl.h>
54# endif /* HAVE_LDAP_SSL && HAVE_LDAP_SSL_H */
55#endif
56
57#include "urldata.h"
58#include <curl/curl.h>
59#include "sendf.h"
60#include "escape.h"
61#include "progress.h"
62#include "transfer.h"
63#include "strcase.h"
64#include "strtok.h"
65#include "curl_ldap.h"
66#include "curl_multibyte.h"
67#include "curl_base64.h"
68#include "connect.h"
69/* The last 3 #include files should be in this order */
70#include "curl_printf.h"
71#include "curl_memory.h"
72#include "memdebug.h"
73
74#ifndef HAVE_LDAP_URL_PARSE
75
76/* Use our own implementation. */
77
78struct ldap_urldesc {
79 char *lud_host;
80 int lud_port;
81#if defined(USE_WIN32_LDAP)
82 TCHAR *lud_dn;
83 TCHAR **lud_attrs;
84#else
85 char *lud_dn;
86 char **lud_attrs;
87#endif
88 int lud_scope;
89#if defined(USE_WIN32_LDAP)
90 TCHAR *lud_filter;
91#else
92 char *lud_filter;
93#endif
94 char **lud_exts;
95 size_t lud_attrs_dups; /* how many were dup'ed, this field is not in the
96 "real" struct so can only be used in code
97 without HAVE_LDAP_URL_PARSE defined */
98};
99
100#undef LDAPURLDesc
101#define LDAPURLDesc struct ldap_urldesc
102
103static int _ldap_url_parse(struct Curl_easy *data,
104 const struct connectdata *conn,
105 LDAPURLDesc **ludp);
106static void _ldap_free_urldesc(LDAPURLDesc *ludp);
107
108#undef ldap_free_urldesc
109#define ldap_free_urldesc _ldap_free_urldesc
110#endif
111
112#ifdef DEBUG_LDAP
113 #define LDAP_TRACE(x) do { \
114 _ldap_trace("%u: ", __LINE__); \
115 _ldap_trace x; \
116 } while(0)
117
118 static void _ldap_trace(const char *fmt, ...);
119#else
120 #define LDAP_TRACE(x) Curl_nop_stmt
121#endif
122
123#if defined(USE_WIN32_LDAP) && defined(ldap_err2string)
124/* Use ansi error strings in UNICODE builds */
125#undef ldap_err2string
126#define ldap_err2string ldap_err2stringA
127#endif
128
129
130static CURLcode ldap_do(struct Curl_easy *data, bool *done);
131
132/*
133 * LDAP protocol handler.
134 */
135
136const struct Curl_handler Curl_handler_ldap = {
137 "LDAP", /* scheme */
138 ZERO_NULL, /* setup_connection */
139 ldap_do, /* do_it */
140 ZERO_NULL, /* done */
141 ZERO_NULL, /* do_more */
142 ZERO_NULL, /* connect_it */
143 ZERO_NULL, /* connecting */
144 ZERO_NULL, /* doing */
145 ZERO_NULL, /* proto_getsock */
146 ZERO_NULL, /* doing_getsock */
147 ZERO_NULL, /* domore_getsock */
148 ZERO_NULL, /* perform_getsock */
149 ZERO_NULL, /* disconnect */
150 ZERO_NULL, /* readwrite */
151 ZERO_NULL, /* connection_check */
152 ZERO_NULL, /* attach connection */
153 PORT_LDAP, /* defport */
154 CURLPROTO_LDAP, /* protocol */
155 CURLPROTO_LDAP, /* family */
156 PROTOPT_NONE /* flags */
157};
158
159#ifdef HAVE_LDAP_SSL
160/*
161 * LDAPS protocol handler.
162 */
163
164const struct Curl_handler Curl_handler_ldaps = {
165 "LDAPS", /* scheme */
166 ZERO_NULL, /* setup_connection */
167 ldap_do, /* do_it */
168 ZERO_NULL, /* done */
169 ZERO_NULL, /* do_more */
170 ZERO_NULL, /* connect_it */
171 ZERO_NULL, /* connecting */
172 ZERO_NULL, /* doing */
173 ZERO_NULL, /* proto_getsock */
174 ZERO_NULL, /* doing_getsock */
175 ZERO_NULL, /* domore_getsock */
176 ZERO_NULL, /* perform_getsock */
177 ZERO_NULL, /* disconnect */
178 ZERO_NULL, /* readwrite */
179 ZERO_NULL, /* connection_check */
180 ZERO_NULL, /* attach connection */
181 PORT_LDAPS, /* defport */
182 CURLPROTO_LDAPS, /* protocol */
183 CURLPROTO_LDAP, /* family */
184 PROTOPT_SSL /* flags */
185};
186#endif
187
188#if defined(USE_WIN32_LDAP)
189
190#if defined(USE_WINDOWS_SSPI)
191static int ldap_win_bind_auth(LDAP *server, const char *user,
192 const char *passwd, unsigned long authflags)
193{
194 ULONG method = 0;
195 SEC_WINNT_AUTH_IDENTITY cred;
196 int rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
197
198 memset(&cred, 0, sizeof(cred));
199
200#if defined(USE_SPNEGO)
201 if(authflags & CURLAUTH_NEGOTIATE) {
202 method = LDAP_AUTH_NEGOTIATE;
203 }
204 else
205#endif
206#if defined(USE_NTLM)
207 if(authflags & CURLAUTH_NTLM) {
208 method = LDAP_AUTH_NTLM;
209 }
210 else
211#endif
212#if !defined(CURL_DISABLE_CRYPTO_AUTH)
213 if(authflags & CURLAUTH_DIGEST) {
214 method = LDAP_AUTH_DIGEST;
215 }
216 else
217#endif
218 {
219 /* required anyway if one of upper preprocessor definitions enabled */
220 }
221
222 if(method && user && passwd) {
223 rc = Curl_create_sspi_identity(user, passwd, &cred);
224 if(!rc) {
225 rc = ldap_bind_s(server, NULL, (TCHAR *)&cred, method);
226 Curl_sspi_free_identity(&cred);
227 }
228 }
229 else {
230 /* proceed with current user credentials */
231 method = LDAP_AUTH_NEGOTIATE;
232 rc = ldap_bind_s(server, NULL, NULL, method);
233 }
234 return rc;
235}
236#endif /* #if defined(USE_WINDOWS_SSPI) */
237
238static int ldap_win_bind(struct Curl_easy *data, LDAP *server,
239 const char *user, const char *passwd)
240{
241 int rc = LDAP_INVALID_CREDENTIALS;
242
243 PTCHAR inuser = NULL;
244 PTCHAR inpass = NULL;
245
246 if(user && passwd && (data->set.httpauth & CURLAUTH_BASIC)) {
247 inuser = curlx_convert_UTF8_to_tchar((char *) user);
248 inpass = curlx_convert_UTF8_to_tchar((char *) passwd);
249
250 rc = ldap_simple_bind_s(server, inuser, inpass);
251
252 curlx_unicodefree(inuser);
253 curlx_unicodefree(inpass);
254 }
255#if defined(USE_WINDOWS_SSPI)
256 else {
257 rc = ldap_win_bind_auth(server, user, passwd, data->set.httpauth);
258 }
259#endif
260
261 return rc;
262}
263#endif /* #if defined(USE_WIN32_LDAP) */
264
265#if defined(USE_WIN32_LDAP)
266#define FREE_ON_WINLDAP(x) curlx_unicodefree(x)
267#else
268#define FREE_ON_WINLDAP(x)
269#endif
270
271
272static CURLcode ldap_do(struct Curl_easy *data, bool *done)
273{
274 CURLcode result = CURLE_OK;
275 int rc = 0;
276 LDAP *server = NULL;
277 LDAPURLDesc *ludp = NULL;
278 LDAPMessage *ldapmsg = NULL;
279 LDAPMessage *entryIterator;
280 int num = 0;
281 struct connectdata *conn = data->conn;
282 int ldap_proto = LDAP_VERSION3;
283 int ldap_ssl = 0;
284 char *val_b64 = NULL;
285 size_t val_b64_sz = 0;
286 curl_off_t dlsize = 0;
287#ifdef LDAP_OPT_NETWORK_TIMEOUT
288 struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */
289#endif
290#if defined(USE_WIN32_LDAP)
291 TCHAR *host = NULL;
292#else
293 char *host = NULL;
294#endif
295 char *user = NULL;
296 char *passwd = NULL;
297
298 *done = TRUE; /* unconditionally */
299 infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d",
300 LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
301 infof(data, "LDAP local: %s", data->state.url);
302
303#ifdef HAVE_LDAP_URL_PARSE
304 rc = ldap_url_parse(data->state.url, &ludp);
305#else
306 rc = _ldap_url_parse(data, conn, &ludp);
307#endif
308 if(rc) {
309 failf(data, "LDAP local: %s", ldap_err2string(rc));
310 result = CURLE_LDAP_INVALID_URL;
311 goto quit;
312 }
313
314 /* Get the URL scheme (either ldap or ldaps) */
315 if(conn->given->flags & PROTOPT_SSL)
316 ldap_ssl = 1;
317 infof(data, "LDAP local: trying to establish %s connection",
318 ldap_ssl ? "encrypted" : "cleartext");
319
320#if defined(USE_WIN32_LDAP)
321 host = curlx_convert_UTF8_to_tchar(conn->host.name);
322 if(!host) {
323 result = CURLE_OUT_OF_MEMORY;
324
325 goto quit;
326 }
327#else
328 host = conn->host.name;
329#endif
330
331 if(conn->bits.user_passwd) {
332 user = conn->user;
333 passwd = conn->passwd;
334 }
335
336#ifdef LDAP_OPT_NETWORK_TIMEOUT
337 ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
338#endif
339 ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
340
341 if(ldap_ssl) {
342#ifdef HAVE_LDAP_SSL
343#ifdef USE_WIN32_LDAP
344 /* Win32 LDAP SDK doesn't support insecure mode without CA! */
345 server = ldap_sslinit(host, (int)conn->port, 1);
346 ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
347#else
348 int ldap_option;
349 char *ldap_ca = conn->ssl_config.CAfile;
350#if defined(CURL_HAS_NOVELL_LDAPSDK)
351 rc = ldapssl_client_init(NULL, NULL);
352 if(rc != LDAP_SUCCESS) {
353 failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
354 result = CURLE_SSL_CERTPROBLEM;
355 goto quit;
356 }
357 if(conn->ssl_config.verifypeer) {
358 /* Novell SDK supports DER or BASE64 files. */
359 int cert_type = LDAPSSL_CERT_FILETYPE_B64;
360 if((data->set.ssl.cert_type) &&
361 (strcasecompare(data->set.ssl.cert_type, "DER")))
362 cert_type = LDAPSSL_CERT_FILETYPE_DER;
363 if(!ldap_ca) {
364 failf(data, "LDAP local: ERROR %s CA cert not set!",
365 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
366 result = CURLE_SSL_CERTPROBLEM;
367 goto quit;
368 }
369 infof(data, "LDAP local: using %s CA cert '%s'",
370 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
371 ldap_ca);
372 rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
373 if(rc != LDAP_SUCCESS) {
374 failf(data, "LDAP local: ERROR setting %s CA cert: %s",
375 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
376 ldap_err2string(rc));
377 result = CURLE_SSL_CERTPROBLEM;
378 goto quit;
379 }
380 ldap_option = LDAPSSL_VERIFY_SERVER;
381 }
382 else
383 ldap_option = LDAPSSL_VERIFY_NONE;
384 rc = ldapssl_set_verify_mode(ldap_option);
385 if(rc != LDAP_SUCCESS) {
386 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
387 ldap_err2string(rc));
388 result = CURLE_SSL_CERTPROBLEM;
389 goto quit;
390 }
391 server = ldapssl_init(host, (int)conn->port, 1);
392 if(!server) {
393 failf(data, "LDAP local: Cannot connect to %s:%ld",
394 conn->host.dispname, conn->port);
395 result = CURLE_COULDNT_CONNECT;
396 goto quit;
397 }
398#elif defined(LDAP_OPT_X_TLS)
399 if(conn->ssl_config.verifypeer) {
400 /* OpenLDAP SDK supports BASE64 files. */
401 if((data->set.ssl.cert_type) &&
402 (!strcasecompare(data->set.ssl.cert_type, "PEM"))) {
403 failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type!");
404 result = CURLE_SSL_CERTPROBLEM;
405 goto quit;
406 }
407 if(!ldap_ca) {
408 failf(data, "LDAP local: ERROR PEM CA cert not set!");
409 result = CURLE_SSL_CERTPROBLEM;
410 goto quit;
411 }
412 infof(data, "LDAP local: using PEM CA cert: %s", ldap_ca);
413 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
414 if(rc != LDAP_SUCCESS) {
415 failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
416 ldap_err2string(rc));
417 result = CURLE_SSL_CERTPROBLEM;
418 goto quit;
419 }
420 ldap_option = LDAP_OPT_X_TLS_DEMAND;
421 }
422 else
423 ldap_option = LDAP_OPT_X_TLS_NEVER;
424
425 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option);
426 if(rc != LDAP_SUCCESS) {
427 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
428 ldap_err2string(rc));
429 result = CURLE_SSL_CERTPROBLEM;
430 goto quit;
431 }
432 server = ldap_init(host, (int)conn->port);
433 if(!server) {
434 failf(data, "LDAP local: Cannot connect to %s:%ld",
435 conn->host.dispname, conn->port);
436 result = CURLE_COULDNT_CONNECT;
437 goto quit;
438 }
439 ldap_option = LDAP_OPT_X_TLS_HARD;
440 rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
441 if(rc != LDAP_SUCCESS) {
442 failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
443 ldap_err2string(rc));
444 result = CURLE_SSL_CERTPROBLEM;
445 goto quit;
446 }
447/*
448 rc = ldap_start_tls_s(server, NULL, NULL);
449 if(rc != LDAP_SUCCESS) {
450 failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
451 ldap_err2string(rc));
452 result = CURLE_SSL_CERTPROBLEM;
453 goto quit;
454 }
455*/
456#else
457 /* we should probably never come up to here since configure
458 should check in first place if we can support LDAP SSL/TLS */
459 failf(data, "LDAP local: SSL/TLS not supported with this version "
460 "of the OpenLDAP toolkit\n");
461 result = CURLE_SSL_CERTPROBLEM;
462 goto quit;
463#endif
464#endif
465#endif /* CURL_LDAP_USE_SSL */
466 }
467 else {
468 server = ldap_init(host, (int)conn->port);
469 if(!server) {
470 failf(data, "LDAP local: Cannot connect to %s:%ld",
471 conn->host.dispname, conn->port);
472 result = CURLE_COULDNT_CONNECT;
473 goto quit;
474 }
475 }
476#ifdef USE_WIN32_LDAP
477 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
478 rc = ldap_win_bind(data, server, user, passwd);
479#else
480 rc = ldap_simple_bind_s(server, user, passwd);
481#endif
482 if(!ldap_ssl && rc) {
483 ldap_proto = LDAP_VERSION2;
484 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
485#ifdef USE_WIN32_LDAP
486 rc = ldap_win_bind(data, server, user, passwd);
487#else
488 rc = ldap_simple_bind_s(server, user, passwd);
489#endif
490 }
491 if(rc) {
492#ifdef USE_WIN32_LDAP
493 failf(data, "LDAP local: bind via ldap_win_bind %s",
494 ldap_err2string(rc));
495#else
496 failf(data, "LDAP local: bind via ldap_simple_bind_s %s",
497 ldap_err2string(rc));
498#endif
499 result = CURLE_LDAP_CANNOT_BIND;
500 goto quit;
501 }
502
503 rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
504 ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
505
506 if(rc && rc != LDAP_SIZELIMIT_EXCEEDED) {
507 failf(data, "LDAP remote: %s", ldap_err2string(rc));
508 result = CURLE_LDAP_SEARCH_FAILED;
509 goto quit;
510 }
511
512 for(num = 0, entryIterator = ldap_first_entry(server, ldapmsg);
513 entryIterator;
514 entryIterator = ldap_next_entry(server, entryIterator), num++) {
515 BerElement *ber = NULL;
516#if defined(USE_WIN32_LDAP)
517 TCHAR *attribute;
518#else
519 char *attribute;
520#endif
521 int i;
522
523 /* Get the DN and write it to the client */
524 {
525 char *name;
526 size_t name_len;
527#if defined(USE_WIN32_LDAP)
528 TCHAR *dn = ldap_get_dn(server, entryIterator);
529 name = curlx_convert_tchar_to_UTF8(dn);
530 if(!name) {
531 ldap_memfree(dn);
532
533 result = CURLE_OUT_OF_MEMORY;
534
535 goto quit;
536 }
537#else
538 char *dn = name = ldap_get_dn(server, entryIterator);
539#endif
540 name_len = strlen(name);
541
542 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"DN: ", 4);
543 if(result) {
544 FREE_ON_WINLDAP(name);
545 ldap_memfree(dn);
546 goto quit;
547 }
548
549 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *) name,
550 name_len);
551 if(result) {
552 FREE_ON_WINLDAP(name);
553 ldap_memfree(dn);
554 goto quit;
555 }
556
557 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
558 if(result) {
559 FREE_ON_WINLDAP(name);
560 ldap_memfree(dn);
561
562 goto quit;
563 }
564
565 dlsize += name_len + 5;
566
567 FREE_ON_WINLDAP(name);
568 ldap_memfree(dn);
569 }
570
571 /* Get the attributes and write them to the client */
572 for(attribute = ldap_first_attribute(server, entryIterator, &ber);
573 attribute;
574 attribute = ldap_next_attribute(server, entryIterator, ber)) {
575 BerValue **vals;
576 size_t attr_len;
577#if defined(USE_WIN32_LDAP)
578 char *attr = curlx_convert_tchar_to_UTF8(attribute);
579 if(!attr) {
580 if(ber)
581 ber_free(ber, 0);
582
583 result = CURLE_OUT_OF_MEMORY;
584
585 goto quit;
586 }
587#else
588 char *attr = attribute;
589#endif
590 attr_len = strlen(attr);
591
592 vals = ldap_get_values_len(server, entryIterator, attribute);
593 if(vals != NULL) {
594 for(i = 0; (vals[i] != NULL); i++) {
595 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\t", 1);
596 if(result) {
597 ldap_value_free_len(vals);
598 FREE_ON_WINLDAP(attr);
599 ldap_memfree(attribute);
600 if(ber)
601 ber_free(ber, 0);
602
603 goto quit;
604 }
605
606 result = Curl_client_write(data, CLIENTWRITE_BODY,
607 (char *) attr, attr_len);
608 if(result) {
609 ldap_value_free_len(vals);
610 FREE_ON_WINLDAP(attr);
611 ldap_memfree(attribute);
612 if(ber)
613 ber_free(ber, 0);
614
615 goto quit;
616 }
617
618 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)": ", 2);
619 if(result) {
620 ldap_value_free_len(vals);
621 FREE_ON_WINLDAP(attr);
622 ldap_memfree(attribute);
623 if(ber)
624 ber_free(ber, 0);
625
626 goto quit;
627 }
628
629 dlsize += attr_len + 3;
630
631 if((attr_len > 7) &&
632 (strcmp(";binary", (char *) attr + (attr_len - 7)) == 0)) {
633 /* Binary attribute, encode to base64. */
634 result = Curl_base64_encode(data,
635 vals[i]->bv_val,
636 vals[i]->bv_len,
637 &val_b64,
638 &val_b64_sz);
639 if(result) {
640 ldap_value_free_len(vals);
641 FREE_ON_WINLDAP(attr);
642 ldap_memfree(attribute);
643 if(ber)
644 ber_free(ber, 0);
645
646 goto quit;
647 }
648
649 if(val_b64_sz > 0) {
650 result = Curl_client_write(data, CLIENTWRITE_BODY, val_b64,
651 val_b64_sz);
652 free(val_b64);
653 if(result) {
654 ldap_value_free_len(vals);
655 FREE_ON_WINLDAP(attr);
656 ldap_memfree(attribute);
657 if(ber)
658 ber_free(ber, 0);
659
660 goto quit;
661 }
662
663 dlsize += val_b64_sz;
664 }
665 }
666 else {
667 result = Curl_client_write(data, CLIENTWRITE_BODY, vals[i]->bv_val,
668 vals[i]->bv_len);
669 if(result) {
670 ldap_value_free_len(vals);
671 FREE_ON_WINLDAP(attr);
672 ldap_memfree(attribute);
673 if(ber)
674 ber_free(ber, 0);
675
676 goto quit;
677 }
678
679 dlsize += vals[i]->bv_len;
680 }
681
682 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
683 if(result) {
684 ldap_value_free_len(vals);
685 FREE_ON_WINLDAP(attr);
686 ldap_memfree(attribute);
687 if(ber)
688 ber_free(ber, 0);
689
690 goto quit;
691 }
692
693 dlsize++;
694 }
695
696 /* Free memory used to store values */
697 ldap_value_free_len(vals);
698 }
699
700 /* Free the attribute as we are done with it */
701 FREE_ON_WINLDAP(attr);
702 ldap_memfree(attribute);
703
704 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
705 if(result)
706 goto quit;
707 dlsize++;
708 Curl_pgrsSetDownloadCounter(data, dlsize);
709 }
710
711 if(ber)
712 ber_free(ber, 0);
713 }
714
715quit:
716 if(ldapmsg) {
717 ldap_msgfree(ldapmsg);
718 LDAP_TRACE(("Received %d entries\n", num));
719 }
720 if(rc == LDAP_SIZELIMIT_EXCEEDED)
721 infof(data, "There are more than %d entries", num);
722 if(ludp)
723 ldap_free_urldesc(ludp);
724 if(server)
725 ldap_unbind_s(server);
726#if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
727 if(ldap_ssl)
728 ldapssl_client_deinit();
729#endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
730
731 FREE_ON_WINLDAP(host);
732
733 /* no data to transfer */
734 Curl_setup_transfer(data, -1, -1, FALSE, -1);
735 connclose(conn, "LDAP connection always disable re-use");
736
737 return result;
738}
739
740#ifdef DEBUG_LDAP
741static void _ldap_trace(const char *fmt, ...)
742{
743 static int do_trace = -1;
744 va_list args;
745
746 if(do_trace == -1) {
747 const char *env = getenv("CURL_TRACE");
748 do_trace = (env && strtol(env, NULL, 10) > 0);
749 }
750 if(!do_trace)
751 return;
752
753 va_start(args, fmt);
754 vfprintf(stderr, fmt, args);
755 va_end(args);
756}
757#endif
758
759#ifndef HAVE_LDAP_URL_PARSE
760
761/*
762 * Return scope-value for a scope-string.
763 */
764static int str2scope(const char *p)
765{
766 if(strcasecompare(p, "one"))
767 return LDAP_SCOPE_ONELEVEL;
768 if(strcasecompare(p, "onetree"))
769 return LDAP_SCOPE_ONELEVEL;
770 if(strcasecompare(p, "base"))
771 return LDAP_SCOPE_BASE;
772 if(strcasecompare(p, "sub"))
773 return LDAP_SCOPE_SUBTREE;
774 if(strcasecompare(p, "subtree"))
775 return LDAP_SCOPE_SUBTREE;
776 return (-1);
777}
778
779/*
780 * Split 'str' into strings separated by commas.
781 * Note: out[] points into 'str'.
782 */
783static bool split_str(char *str, char ***out, size_t *count)
784{
785 char **res;
786 char *lasts;
787 char *s;
788 size_t i;
789 size_t items = 1;
790
791 s = strchr(str, ',');
792 while(s) {
793 items++;
794 s = strchr(++s, ',');
795 }
796
797 res = calloc(items, sizeof(char *));
798 if(!res)
799 return FALSE;
800
801 for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items;
802 s = strtok_r(NULL, ",", &lasts), i++)
803 res[i] = s;
804
805 *out = res;
806 *count = items;
807
808 return TRUE;
809}
810
811/*
812 * Break apart the pieces of an LDAP URL.
813 * Syntax:
814 * ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
815 *
816 * <hostname> already known from 'conn->host.name'.
817 * <port> already known from 'conn->remote_port'.
818 * extract the rest from 'data->state.path+1'. All fields are optional.
819 * e.g.
820 * ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
821 * yields ludp->lud_dn = "".
822 *
823 * Defined in RFC4516 section 2.
824 */
825static int _ldap_url_parse2(struct Curl_easy *data,
826 const struct connectdata *conn, LDAPURLDesc *ludp)
827{
828 int rc = LDAP_SUCCESS;
829 char *p;
830 char *path;
831 char *q = NULL;
832 char *query = NULL;
833 size_t i;
834
835 if(!data ||
836 !data->state.up.path ||
837 data->state.up.path[0] != '/' ||
838 !strncasecompare("LDAP", data->state.up.scheme, 4))
839 return LDAP_INVALID_SYNTAX;
840
841 ludp->lud_scope = LDAP_SCOPE_BASE;
842 ludp->lud_port = conn->remote_port;
843 ludp->lud_host = conn->host.name;
844
845 /* Duplicate the path */
846 p = path = strdup(data->state.up.path + 1);
847 if(!path)
848 return LDAP_NO_MEMORY;
849
850 /* Duplicate the query if present */
851 if(data->state.up.query) {
852 q = query = strdup(data->state.up.query);
853 if(!query) {
854 free(path);
855 return LDAP_NO_MEMORY;
856 }
857 }
858
859 /* Parse the DN (Distinguished Name) */
860 if(*p) {
861 char *dn = p;
862 char *unescaped;
863 CURLcode result;
864
865 LDAP_TRACE(("DN '%s'\n", dn));
866
867 /* Unescape the DN */
868 result = Curl_urldecode(data, dn, 0, &unescaped, NULL, REJECT_ZERO);
869 if(result) {
870 rc = LDAP_NO_MEMORY;
871
872 goto quit;
873 }
874
875#if defined(USE_WIN32_LDAP)
876 /* Convert the unescaped string to a tchar */
877 ludp->lud_dn = curlx_convert_UTF8_to_tchar(unescaped);
878
879 /* Free the unescaped string as we are done with it */
880 free(unescaped);
881
882 if(!ludp->lud_dn) {
883 rc = LDAP_NO_MEMORY;
884
885 goto quit;
886 }
887#else
888 ludp->lud_dn = unescaped;
889#endif
890 }
891
892 p = q;
893 if(!p)
894 goto quit;
895
896 /* Parse the attributes. skip "??" */
897 q = strchr(p, '?');
898 if(q)
899 *q++ = '\0';
900
901 if(*p) {
902 char **attributes;
903 size_t count = 0;
904
905 /* Split the string into an array of attributes */
906 if(!split_str(p, &attributes, &count)) {
907 rc = LDAP_NO_MEMORY;
908
909 goto quit;
910 }
911
912 /* Allocate our array (+1 for the NULL entry) */
913#if defined(USE_WIN32_LDAP)
914 ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *));
915#else
916 ludp->lud_attrs = calloc(count + 1, sizeof(char *));
917#endif
918 if(!ludp->lud_attrs) {
919 free(attributes);
920
921 rc = LDAP_NO_MEMORY;
922
923 goto quit;
924 }
925
926 for(i = 0; i < count; i++) {
927 char *unescaped;
928 CURLcode result;
929
930 LDAP_TRACE(("attr[%zu] '%s'\n", i, attributes[i]));
931
932 /* Unescape the attribute */
933 result = Curl_urldecode(data, attributes[i], 0, &unescaped, NULL,
934 REJECT_ZERO);
935 if(result) {
936 free(attributes);
937
938 rc = LDAP_NO_MEMORY;
939
940 goto quit;
941 }
942
943#if defined(USE_WIN32_LDAP)
944 /* Convert the unescaped string to a tchar */
945 ludp->lud_attrs[i] = curlx_convert_UTF8_to_tchar(unescaped);
946
947 /* Free the unescaped string as we are done with it */
948 free(unescaped);
949
950 if(!ludp->lud_attrs[i]) {
951 free(attributes);
952
953 rc = LDAP_NO_MEMORY;
954
955 goto quit;
956 }
957#else
958 ludp->lud_attrs[i] = unescaped;
959#endif
960
961 ludp->lud_attrs_dups++;
962 }
963
964 free(attributes);
965 }
966
967 p = q;
968 if(!p)
969 goto quit;
970
971 /* Parse the scope. skip "??" */
972 q = strchr(p, '?');
973 if(q)
974 *q++ = '\0';
975
976 if(*p) {
977 ludp->lud_scope = str2scope(p);
978 if(ludp->lud_scope == -1) {
979 rc = LDAP_INVALID_SYNTAX;
980
981 goto quit;
982 }
983 LDAP_TRACE(("scope %d\n", ludp->lud_scope));
984 }
985
986 p = q;
987 if(!p)
988 goto quit;
989
990 /* Parse the filter */
991 q = strchr(p, '?');
992 if(q)
993 *q++ = '\0';
994
995 if(*p) {
996 char *filter = p;
997 char *unescaped;
998 CURLcode result;
999
1000 LDAP_TRACE(("filter '%s'\n", filter));
1001
1002 /* Unescape the filter */
1003 result = Curl_urldecode(data, filter, 0, &unescaped, NULL, REJECT_ZERO);
1004 if(result) {
1005 rc = LDAP_NO_MEMORY;
1006
1007 goto quit;
1008 }
1009
1010#if defined(USE_WIN32_LDAP)
1011 /* Convert the unescaped string to a tchar */
1012 ludp->lud_filter = curlx_convert_UTF8_to_tchar(unescaped);
1013
1014 /* Free the unescaped string as we are done with it */
1015 free(unescaped);
1016
1017 if(!ludp->lud_filter) {
1018 rc = LDAP_NO_MEMORY;
1019
1020 goto quit;
1021 }
1022#else
1023 ludp->lud_filter = unescaped;
1024#endif
1025 }
1026
1027 p = q;
1028 if(p && !*p) {
1029 rc = LDAP_INVALID_SYNTAX;
1030
1031 goto quit;
1032 }
1033
1034quit:
1035 free(path);
1036 free(query);
1037
1038 return rc;
1039}
1040
1041static int _ldap_url_parse(struct Curl_easy *data,
1042 const struct connectdata *conn,
1043 LDAPURLDesc **ludpp)
1044{
1045 LDAPURLDesc *ludp = calloc(1, sizeof(*ludp));
1046 int rc;
1047
1048 *ludpp = NULL;
1049 if(!ludp)
1050 return LDAP_NO_MEMORY;
1051
1052 rc = _ldap_url_parse2(data, conn, ludp);
1053 if(rc != LDAP_SUCCESS) {
1054 _ldap_free_urldesc(ludp);
1055 ludp = NULL;
1056 }
1057 *ludpp = ludp;
1058 return (rc);
1059}
1060
1061static void _ldap_free_urldesc(LDAPURLDesc *ludp)
1062{
1063 if(!ludp)
1064 return;
1065
1066#if defined(USE_WIN32_LDAP)
1067 curlx_unicodefree(ludp->lud_dn);
1068 curlx_unicodefree(ludp->lud_filter);
1069#else
1070 free(ludp->lud_dn);
1071 free(ludp->lud_filter);
1072#endif
1073
1074 if(ludp->lud_attrs) {
1075 size_t i;
1076 for(i = 0; i < ludp->lud_attrs_dups; i++) {
1077#if defined(USE_WIN32_LDAP)
1078 curlx_unicodefree(ludp->lud_attrs[i]);
1079#else
1080 free(ludp->lud_attrs[i]);
1081#endif
1082 }
1083 free(ludp->lud_attrs);
1084 }
1085
1086 free(ludp);
1087}
1088#endif /* !HAVE_LDAP_URL_PARSE */
1089#endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */
1090