source: UsbWattMeter/trunk/curl-7.47.1/lib/ldap.c@ 167

Last change on this file since 167 was 167, checked in by coas-nagasima, 8 years ago

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[164]1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, 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.haxx.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/* These are macros in both <wincrypt.h> (in above <winldap.h>) and typedefs
58 * in BoringSSL's <openssl/x509.h>
59 */
60#ifdef HAVE_BORINGSSL
61# undef X509_NAME
62# undef X509_CERT_PAIR
63# undef X509_EXTENSIONS
64#endif
65
66#include "urldata.h"
67#include <curl/curl.h>
68#include "sendf.h"
69#include "escape.h"
70#include "progress.h"
71#include "transfer.h"
72#include "strequal.h"
73#include "strtok.h"
74#include "curl_ldap.h"
75#include "curl_multibyte.h"
76#include "curl_base64.h"
77#include "rawstr.h"
78#include "connect.h"
79#include "curl_printf.h"
80
81/* The last #include files should be: */
82#include "curl_memory.h"
83#include "memdebug.h"
84
85#ifndef HAVE_LDAP_URL_PARSE
86
87/* Use our own implementation. */
88
89typedef struct {
90 char *lud_host;
91 int lud_port;
92#if defined(USE_WIN32_LDAP)
93 TCHAR *lud_dn;
94 TCHAR **lud_attrs;
95#else
96 char *lud_dn;
97 char **lud_attrs;
98#endif
99 int lud_scope;
100#if defined(USE_WIN32_LDAP)
101 TCHAR *lud_filter;
102#else
103 char *lud_filter;
104#endif
105 char **lud_exts;
106 size_t lud_attrs_dups; /* how many were dup'ed, this field is not in the
107 "real" struct so can only be used in code
108 without HAVE_LDAP_URL_PARSE defined */
109} CURL_LDAPURLDesc;
110
111#undef LDAPURLDesc
112#define LDAPURLDesc CURL_LDAPURLDesc
113
114static int _ldap_url_parse (const struct connectdata *conn,
115 LDAPURLDesc **ludp);
116static void _ldap_free_urldesc (LDAPURLDesc *ludp);
117
118#undef ldap_free_urldesc
119#define ldap_free_urldesc _ldap_free_urldesc
120#endif
121
122#ifdef DEBUG_LDAP
123 #define LDAP_TRACE(x) do { \
124 _ldap_trace ("%u: ", __LINE__); \
125 _ldap_trace x; \
126 } WHILE_FALSE
127
128 static void _ldap_trace (const char *fmt, ...);
129#else
130 #define LDAP_TRACE(x) Curl_nop_stmt
131#endif
132
133
134static CURLcode Curl_ldap(struct connectdata *conn, bool *done);
135
136/*
137 * LDAP protocol handler.
138 */
139
140const struct Curl_handler Curl_handler_ldap = {
141 "LDAP", /* scheme */
142 ZERO_NULL, /* setup_connection */
143 Curl_ldap, /* do_it */
144 ZERO_NULL, /* done */
145 ZERO_NULL, /* do_more */
146 ZERO_NULL, /* connect_it */
147 ZERO_NULL, /* connecting */
148 ZERO_NULL, /* doing */
149 ZERO_NULL, /* proto_getsock */
150 ZERO_NULL, /* doing_getsock */
151 ZERO_NULL, /* domore_getsock */
152 ZERO_NULL, /* perform_getsock */
153 ZERO_NULL, /* disconnect */
154 ZERO_NULL, /* readwrite */
155 PORT_LDAP, /* defport */
156 CURLPROTO_LDAP, /* protocol */
157 PROTOPT_NONE /* flags */
158};
159
160#ifdef HAVE_LDAP_SSL
161/*
162 * LDAPS protocol handler.
163 */
164
165const struct Curl_handler Curl_handler_ldaps = {
166 "LDAPS", /* scheme */
167 ZERO_NULL, /* setup_connection */
168 Curl_ldap, /* do_it */
169 ZERO_NULL, /* done */
170 ZERO_NULL, /* do_more */
171 ZERO_NULL, /* connect_it */
172 ZERO_NULL, /* connecting */
173 ZERO_NULL, /* doing */
174 ZERO_NULL, /* proto_getsock */
175 ZERO_NULL, /* doing_getsock */
176 ZERO_NULL, /* domore_getsock */
177 ZERO_NULL, /* perform_getsock */
178 ZERO_NULL, /* disconnect */
179 ZERO_NULL, /* readwrite */
180 PORT_LDAPS, /* defport */
181 CURLPROTO_LDAPS, /* protocol */
182 PROTOPT_SSL /* flags */
183};
184#endif
185
186
187static CURLcode Curl_ldap(struct connectdata *conn, bool *done)
188{
189 CURLcode result = CURLE_OK;
190 int rc = 0;
191 LDAP *server = NULL;
192 LDAPURLDesc *ludp = NULL;
193 LDAPMessage *ldapmsg = NULL;
194 LDAPMessage *entryIterator;
195 int num = 0;
196 struct SessionHandle *data=conn->data;
197 int ldap_proto = LDAP_VERSION3;
198 int ldap_ssl = 0;
199 char *val_b64 = NULL;
200 size_t val_b64_sz = 0;
201 curl_off_t dlsize = 0;
202#ifdef LDAP_OPT_NETWORK_TIMEOUT
203 struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */
204#endif
205#if defined(USE_WIN32_LDAP)
206 TCHAR *host = NULL;
207 TCHAR *user = NULL;
208 TCHAR *passwd = NULL;
209#else
210 char *host = NULL;
211 char *user = NULL;
212 char *passwd = NULL;
213#endif
214
215 *done = TRUE; /* unconditionally */
216 infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d\n",
217 LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
218 infof(data, "LDAP local: %s\n", data->change.url);
219
220#ifdef HAVE_LDAP_URL_PARSE
221 rc = ldap_url_parse(data->change.url, &ludp);
222#else
223 rc = _ldap_url_parse(conn, &ludp);
224#endif
225 if(rc != 0) {
226 failf(data, "LDAP local: %s", ldap_err2string(rc));
227 result = CURLE_LDAP_INVALID_URL;
228 goto quit;
229 }
230
231 /* Get the URL scheme ( either ldap or ldaps ) */
232 if(conn->given->flags & PROTOPT_SSL)
233 ldap_ssl = 1;
234 infof(data, "LDAP local: trying to establish %s connection\n",
235 ldap_ssl ? "encrypted" : "cleartext");
236
237#if defined(USE_WIN32_LDAP)
238 host = Curl_convert_UTF8_to_tchar(conn->host.name);
239 if(!host) {
240 result = CURLE_OUT_OF_MEMORY;
241
242 goto quit;
243 }
244
245 if(conn->bits.user_passwd) {
246 user = Curl_convert_UTF8_to_tchar(conn->user);
247 passwd = Curl_convert_UTF8_to_tchar(conn->passwd);
248 if(!user || !passwd) {
249 result = CURLE_OUT_OF_MEMORY;
250
251 goto quit;
252 }
253 }
254#else
255 host = conn->host.name;
256
257 if(conn->bits.user_passwd) {
258 user = conn->user;
259 passwd = conn->passwd;
260 }
261#endif
262
263#ifdef LDAP_OPT_NETWORK_TIMEOUT
264 ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
265#endif
266 ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
267
268 if(ldap_ssl) {
269#ifdef HAVE_LDAP_SSL
270#ifdef USE_WIN32_LDAP
271 /* Win32 LDAP SDK doesn't support insecure mode without CA! */
272 server = ldap_sslinit(host, (int)conn->port, 1);
273 ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
274#else
275 int ldap_option;
276 char* ldap_ca = data->set.str[STRING_SSL_CAFILE];
277#if defined(CURL_HAS_NOVELL_LDAPSDK)
278 rc = ldapssl_client_init(NULL, NULL);
279 if(rc != LDAP_SUCCESS) {
280 failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
281 result = CURLE_SSL_CERTPROBLEM;
282 goto quit;
283 }
284 if(data->set.ssl.verifypeer) {
285 /* Novell SDK supports DER or BASE64 files. */
286 int cert_type = LDAPSSL_CERT_FILETYPE_B64;
287 if((data->set.str[STRING_CERT_TYPE]) &&
288 (Curl_raw_equal(data->set.str[STRING_CERT_TYPE], "DER")))
289 cert_type = LDAPSSL_CERT_FILETYPE_DER;
290 if(!ldap_ca) {
291 failf(data, "LDAP local: ERROR %s CA cert not set!",
292 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
293 result = CURLE_SSL_CERTPROBLEM;
294 goto quit;
295 }
296 infof(data, "LDAP local: using %s CA cert '%s'\n",
297 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
298 ldap_ca);
299 rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
300 if(rc != LDAP_SUCCESS) {
301 failf(data, "LDAP local: ERROR setting %s CA cert: %s",
302 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
303 ldap_err2string(rc));
304 result = CURLE_SSL_CERTPROBLEM;
305 goto quit;
306 }
307 ldap_option = LDAPSSL_VERIFY_SERVER;
308 }
309 else
310 ldap_option = LDAPSSL_VERIFY_NONE;
311 rc = ldapssl_set_verify_mode(ldap_option);
312 if(rc != LDAP_SUCCESS) {
313 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
314 ldap_err2string(rc));
315 result = CURLE_SSL_CERTPROBLEM;
316 goto quit;
317 }
318 server = ldapssl_init(host, (int)conn->port, 1);
319 if(server == NULL) {
320 failf(data, "LDAP local: Cannot connect to %s:%ld",
321 conn->host.dispname, conn->port);
322 result = CURLE_COULDNT_CONNECT;
323 goto quit;
324 }
325#elif defined(LDAP_OPT_X_TLS)
326 if(data->set.ssl.verifypeer) {
327 /* OpenLDAP SDK supports BASE64 files. */
328 if((data->set.str[STRING_CERT_TYPE]) &&
329 (!Curl_raw_equal(data->set.str[STRING_CERT_TYPE], "PEM"))) {
330 failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type!");
331 result = CURLE_SSL_CERTPROBLEM;
332 goto quit;
333 }
334 if(!ldap_ca) {
335 failf(data, "LDAP local: ERROR PEM CA cert not set!");
336 result = CURLE_SSL_CERTPROBLEM;
337 goto quit;
338 }
339 infof(data, "LDAP local: using PEM CA cert: %s\n", ldap_ca);
340 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
341 if(rc != LDAP_SUCCESS) {
342 failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
343 ldap_err2string(rc));
344 result = CURLE_SSL_CERTPROBLEM;
345 goto quit;
346 }
347 ldap_option = LDAP_OPT_X_TLS_DEMAND;
348 }
349 else
350 ldap_option = LDAP_OPT_X_TLS_NEVER;
351
352 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option);
353 if(rc != LDAP_SUCCESS) {
354 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
355 ldap_err2string(rc));
356 result = CURLE_SSL_CERTPROBLEM;
357 goto quit;
358 }
359 server = ldap_init(host, (int)conn->port);
360 if(server == NULL) {
361 failf(data, "LDAP local: Cannot connect to %s:%ld",
362 conn->host.dispname, conn->port);
363 result = CURLE_COULDNT_CONNECT;
364 goto quit;
365 }
366 ldap_option = LDAP_OPT_X_TLS_HARD;
367 rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
368 if(rc != LDAP_SUCCESS) {
369 failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
370 ldap_err2string(rc));
371 result = CURLE_SSL_CERTPROBLEM;
372 goto quit;
373 }
374/*
375 rc = ldap_start_tls_s(server, NULL, NULL);
376 if(rc != LDAP_SUCCESS) {
377 failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
378 ldap_err2string(rc));
379 result = CURLE_SSL_CERTPROBLEM;
380 goto quit;
381 }
382*/
383#else
384 /* we should probably never come up to here since configure
385 should check in first place if we can support LDAP SSL/TLS */
386 failf(data, "LDAP local: SSL/TLS not supported with this version "
387 "of the OpenLDAP toolkit\n");
388 result = CURLE_SSL_CERTPROBLEM;
389 goto quit;
390#endif
391#endif
392#endif /* CURL_LDAP_USE_SSL */
393 }
394 else {
395 server = ldap_init(host, (int)conn->port);
396 if(server == NULL) {
397 failf(data, "LDAP local: Cannot connect to %s:%ld",
398 conn->host.dispname, conn->port);
399 result = CURLE_COULDNT_CONNECT;
400 goto quit;
401 }
402 }
403#ifdef USE_WIN32_LDAP
404 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
405#endif
406
407 rc = ldap_simple_bind_s(server, user, passwd);
408 if(!ldap_ssl && rc != 0) {
409 ldap_proto = LDAP_VERSION2;
410 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
411 rc = ldap_simple_bind_s(server, user, passwd);
412 }
413 if(rc != 0) {
414 failf(data, "LDAP local: ldap_simple_bind_s %s", ldap_err2string(rc));
415 result = CURLE_LDAP_CANNOT_BIND;
416 goto quit;
417 }
418
419 rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
420 ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
421
422 if(rc != 0 && rc != LDAP_SIZELIMIT_EXCEEDED) {
423 failf(data, "LDAP remote: %s", ldap_err2string(rc));
424 result = CURLE_LDAP_SEARCH_FAILED;
425 goto quit;
426 }
427
428 for(num = 0, entryIterator = ldap_first_entry(server, ldapmsg);
429 entryIterator;
430 entryIterator = ldap_next_entry(server, entryIterator), num++) {
431 BerElement *ber = NULL;
432#if defined(USE_WIN32_LDAP)
433 TCHAR *attribute;
434#else
435 char *attribute; /*! suspicious that this isn't 'const' */
436#endif
437 int i;
438
439 /* Get the DN and write it to the client */
440 {
441 char *name;
442 size_t name_len;
443#if defined(USE_WIN32_LDAP)
444 TCHAR *dn = ldap_get_dn(server, entryIterator);
445 name = Curl_convert_tchar_to_UTF8(dn);
446 if(!name) {
447 ldap_memfree(dn);
448
449 result = CURLE_OUT_OF_MEMORY;
450
451 goto quit;
452 }
453#else
454 char *dn = name = ldap_get_dn(server, entryIterator);
455#endif
456 name_len = strlen(name);
457
458 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"DN: ", 4);
459 if(result) {
460#if defined(USE_WIN32_LDAP)
461 Curl_unicodefree(name);
462#endif
463 ldap_memfree(dn);
464
465 goto quit;
466 }
467
468 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *) name,
469 name_len);
470 if(result) {
471#if defined(USE_WIN32_LDAP)
472 Curl_unicodefree(name);
473#endif
474 ldap_memfree(dn);
475
476 goto quit;
477 }
478
479 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
480 if(result) {
481#if defined(USE_WIN32_LDAP)
482 Curl_unicodefree(name);
483#endif
484 ldap_memfree(dn);
485
486 goto quit;
487 }
488
489 dlsize += name_len + 5;
490
491#if defined(USE_WIN32_LDAP)
492 Curl_unicodefree(name);
493#endif
494 ldap_memfree(dn);
495 }
496
497 /* Get the attributes and write them to the client */
498 for(attribute = ldap_first_attribute(server, entryIterator, &ber);
499 attribute;
500 attribute = ldap_next_attribute(server, entryIterator, ber)) {
501 BerValue **vals;
502 size_t attr_len;
503#if defined(USE_WIN32_LDAP)
504 char *attr = Curl_convert_tchar_to_UTF8(attribute);
505 if(!attr) {
506 if(ber)
507 ber_free(ber, 0);
508
509 result = CURLE_OUT_OF_MEMORY;
510
511 goto quit;
512 }
513#else
514 char *attr = attribute;
515#endif
516 attr_len = strlen(attr);
517
518 vals = ldap_get_values_len(server, entryIterator, attribute);
519 if(vals != NULL) {
520 for(i = 0; (vals[i] != NULL); i++) {
521 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\t", 1);
522 if(result) {
523 ldap_value_free_len(vals);
524#if defined(USE_WIN32_LDAP)
525 Curl_unicodefree(attr);
526#endif
527 ldap_memfree(attribute);
528 if(ber)
529 ber_free(ber, 0);
530
531 goto quit;
532 }
533
534 result = Curl_client_write(conn, CLIENTWRITE_BODY,
535 (char *) attr, attr_len);
536 if(result) {
537 ldap_value_free_len(vals);
538#if defined(USE_WIN32_LDAP)
539 Curl_unicodefree(attr);
540#endif
541 ldap_memfree(attribute);
542 if(ber)
543 ber_free(ber, 0);
544
545 goto quit;
546 }
547
548 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)": ", 2);
549 if(result) {
550 ldap_value_free_len(vals);
551#if defined(USE_WIN32_LDAP)
552 Curl_unicodefree(attr);
553#endif
554 ldap_memfree(attribute);
555 if(ber)
556 ber_free(ber, 0);
557
558 goto quit;
559 }
560
561 dlsize += attr_len + 3;
562
563 if((attr_len > 7) &&
564 (strcmp(";binary", (char *) attr + (attr_len - 7)) == 0)) {
565 /* Binary attribute, encode to base64. */
566 result = Curl_base64_encode(data,
567 vals[i]->bv_val,
568 vals[i]->bv_len,
569 &val_b64,
570 &val_b64_sz);
571 if(result) {
572 ldap_value_free_len(vals);
573#if defined(USE_WIN32_LDAP)
574 Curl_unicodefree(attr);
575#endif
576 ldap_memfree(attribute);
577 if(ber)
578 ber_free(ber, 0);
579
580 goto quit;
581 }
582
583 if(val_b64_sz > 0) {
584 result = Curl_client_write(conn, CLIENTWRITE_BODY, val_b64,
585 val_b64_sz);
586 free(val_b64);
587 if(result) {
588 ldap_value_free_len(vals);
589#if defined(USE_WIN32_LDAP)
590 Curl_unicodefree(attr);
591#endif
592 ldap_memfree(attribute);
593 if(ber)
594 ber_free(ber, 0);
595
596 goto quit;
597 }
598
599 dlsize += val_b64_sz;
600 }
601 }
602 else {
603 result = Curl_client_write(conn, CLIENTWRITE_BODY, vals[i]->bv_val,
604 vals[i]->bv_len);
605 if(result) {
606 ldap_value_free_len(vals);
607#if defined(USE_WIN32_LDAP)
608 Curl_unicodefree(attr);
609#endif
610 ldap_memfree(attribute);
611 if(ber)
612 ber_free(ber, 0);
613
614 goto quit;
615 }
616
617 dlsize += vals[i]->bv_len;
618 }
619
620 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
621 if(result) {
622 ldap_value_free_len(vals);
623#if defined(USE_WIN32_LDAP)
624 Curl_unicodefree(attr);
625#endif
626 ldap_memfree(attribute);
627 if(ber)
628 ber_free(ber, 0);
629
630 goto quit;
631 }
632
633 dlsize++;
634 }
635
636 /* Free memory used to store values */
637 ldap_value_free_len(vals);
638 }
639
640 /* Free the attribute as we are done with it */
641#if defined(USE_WIN32_LDAP)
642 Curl_unicodefree(attr);
643#endif
644 ldap_memfree(attribute);
645
646 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
647 if(result)
648 goto quit;
649 dlsize++;
650 Curl_pgrsSetDownloadCounter(data, dlsize);
651 }
652
653 if(ber)
654 ber_free(ber, 0);
655 }
656
657quit:
658 if(ldapmsg) {
659 ldap_msgfree(ldapmsg);
660 LDAP_TRACE (("Received %d entries\n", num));
661 }
662 if(rc == LDAP_SIZELIMIT_EXCEEDED)
663 infof(data, "There are more than %d entries\n", num);
664 if(ludp)
665 ldap_free_urldesc(ludp);
666 if(server)
667 ldap_unbind_s(server);
668#if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
669 if(ldap_ssl)
670 ldapssl_client_deinit();
671#endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
672
673#if defined(USE_WIN32_LDAP)
674 Curl_unicodefree(passwd);
675 Curl_unicodefree(user);
676 Curl_unicodefree(host);
677#endif
678
679 /* no data to transfer */
680 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
681 connclose(conn, "LDAP connection always disable re-use");
682
683 return result;
684}
685
686#ifdef DEBUG_LDAP
687static void _ldap_trace (const char *fmt, ...)
688{
689 static int do_trace = -1;
690 va_list args;
691
692 if(do_trace == -1) {
693 const char *env = getenv("CURL_TRACE");
694 do_trace = (env && strtol(env, NULL, 10) > 0);
695 }
696 if(!do_trace)
697 return;
698
699 va_start (args, fmt);
700 vfprintf (stderr, fmt, args);
701 va_end (args);
702}
703#endif
704
705#ifndef HAVE_LDAP_URL_PARSE
706
707/*
708 * Return scope-value for a scope-string.
709 */
710static int str2scope (const char *p)
711{
712 if(strequal(p, "one"))
713 return LDAP_SCOPE_ONELEVEL;
714 if(strequal(p, "onetree"))
715 return LDAP_SCOPE_ONELEVEL;
716 if(strequal(p, "base"))
717 return LDAP_SCOPE_BASE;
718 if(strequal(p, "sub"))
719 return LDAP_SCOPE_SUBTREE;
720 if(strequal( p, "subtree"))
721 return LDAP_SCOPE_SUBTREE;
722 return (-1);
723}
724
725/*
726 * Split 'str' into strings separated by commas.
727 * Note: out[] points into 'str'.
728 */
729static bool split_str(char *str, char ***out, size_t *count)
730{
731 char **res;
732 char *lasts;
733 char *s;
734 size_t i;
735 size_t items = 1;
736
737 s = strchr(str, ',');
738 while(s) {
739 items++;
740 s = strchr(++s, ',');
741 }
742
743 res = calloc(items, sizeof(char *));
744 if(!res)
745 return FALSE;
746
747 for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items;
748 s = strtok_r(NULL, ",", &lasts), i++)
749 res[i] = s;
750
751 *out = res;
752 *count = items;
753
754 return TRUE;
755}
756
757/*
758 * Break apart the pieces of an LDAP URL.
759 * Syntax:
760 * ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
761 *
762 * <hostname> already known from 'conn->host.name'.
763 * <port> already known from 'conn->remote_port'.
764 * extract the rest from 'conn->data->state.path+1'. All fields are optional.
765 * e.g.
766 * ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
767 * yields ludp->lud_dn = "".
768 *
769 * Defined in RFC4516 section 2.
770 */
771static int _ldap_url_parse2 (const struct connectdata *conn, LDAPURLDesc *ludp)
772{
773 int rc = LDAP_SUCCESS;
774 char *path;
775 char *p;
776 char *q;
777 size_t i;
778
779 if(!conn->data ||
780 !conn->data->state.path ||
781 conn->data->state.path[0] != '/' ||
782 !checkprefix("LDAP", conn->data->change.url))
783 return LDAP_INVALID_SYNTAX;
784
785 ludp->lud_scope = LDAP_SCOPE_BASE;
786 ludp->lud_port = conn->remote_port;
787 ludp->lud_host = conn->host.name;
788
789 /* Duplicate the path */
790 p = path = strdup(conn->data->state.path + 1);
791 if(!path)
792 return LDAP_NO_MEMORY;
793
794 /* Parse the DN (Distinguished Name) */
795 q = strchr(p, '?');
796 if(q)
797 *q++ = '\0';
798
799 if(*p) {
800 char *dn = p;
801 char *unescaped;
802
803 LDAP_TRACE (("DN '%s'\n", dn));
804
805 /* Unescape the DN */
806 unescaped = curl_easy_unescape(conn->data, dn, 0, NULL);
807 if(!unescaped) {
808 rc = LDAP_NO_MEMORY;
809
810 goto quit;
811 }
812
813#if defined(USE_WIN32_LDAP)
814 /* Convert the unescaped string to a tchar */
815 ludp->lud_dn = Curl_convert_UTF8_to_tchar(unescaped);
816
817 /* Free the unescaped string as we are done with it */
818 Curl_unicodefree(unescaped);
819
820 if(!ludp->lud_dn) {
821 rc = LDAP_NO_MEMORY;
822
823 goto quit;
824 }
825#else
826 ludp->lud_dn = unescaped;
827#endif
828 }
829
830 p = q;
831 if(!p)
832 goto quit;
833
834 /* Parse the attributes. skip "??" */
835 q = strchr(p, '?');
836 if(q)
837 *q++ = '\0';
838
839 if(*p) {
840 char **attributes;
841 size_t count = 0;
842
843 /* Split the string into an array of attributes */
844 if(!split_str(p, &attributes, &count)) {
845 rc = LDAP_NO_MEMORY;
846
847 goto quit;
848 }
849
850 /* Allocate our array (+1 for the NULL entry) */
851#if defined(USE_WIN32_LDAP)
852 ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *));
853#else
854 ludp->lud_attrs = calloc(count + 1, sizeof(char *));
855#endif
856 if(!ludp->lud_attrs) {
857 free(attributes);
858
859 rc = LDAP_NO_MEMORY;
860
861 goto quit;
862 }
863
864 for(i = 0; i < count; i++) {
865 char *unescaped;
866
867 LDAP_TRACE (("attr[%d] '%s'\n", i, attributes[i]));
868
869 /* Unescape the attribute */
870 unescaped = curl_easy_unescape(conn->data, attributes[i], 0, NULL);
871 if(!unescaped) {
872 free(attributes);
873
874 rc = LDAP_NO_MEMORY;
875
876 goto quit;
877 }
878
879#if defined(USE_WIN32_LDAP)
880 /* Convert the unescaped string to a tchar */
881 ludp->lud_attrs[i] = Curl_convert_UTF8_to_tchar(unescaped);
882
883 /* Free the unescaped string as we are done with it */
884 Curl_unicodefree(unescaped);
885
886 if(!ludp->lud_attrs[i]) {
887 free(attributes);
888
889 rc = LDAP_NO_MEMORY;
890
891 goto quit;
892 }
893#else
894 ludp->lud_attrs[i] = unescaped;
895#endif
896
897 ludp->lud_attrs_dups++;
898 }
899
900 free(attributes);
901 }
902
903 p = q;
904 if(!p)
905 goto quit;
906
907 /* Parse the scope. skip "??" */
908 q = strchr(p, '?');
909 if(q)
910 *q++ = '\0';
911
912 if(*p) {
913 ludp->lud_scope = str2scope(p);
914 if(ludp->lud_scope == -1) {
915 rc = LDAP_INVALID_SYNTAX;
916
917 goto quit;
918 }
919 LDAP_TRACE (("scope %d\n", ludp->lud_scope));
920 }
921
922 p = q;
923 if(!p)
924 goto quit;
925
926 /* Parse the filter */
927 q = strchr(p, '?');
928 if(q)
929 *q++ = '\0';
930
931 if(*p) {
932 char *filter = p;
933 char *unescaped;
934
935 LDAP_TRACE (("filter '%s'\n", filter));
936
937 /* Unescape the filter */
938 unescaped = curl_easy_unescape(conn->data, filter, 0, NULL);
939 if(!unescaped) {
940 rc = LDAP_NO_MEMORY;
941
942 goto quit;
943 }
944
945#if defined(USE_WIN32_LDAP)
946 /* Convert the unescaped string to a tchar */
947 ludp->lud_filter = Curl_convert_UTF8_to_tchar(unescaped);
948
949 /* Free the unescaped string as we are done with it */
950 Curl_unicodefree(unescaped);
951
952 if(!ludp->lud_filter) {
953 rc = LDAP_NO_MEMORY;
954
955 goto quit;
956 }
957#else
958 ludp->lud_filter = unescaped;
959#endif
960 }
961
962 p = q;
963 if(p && !*p) {
964 rc = LDAP_INVALID_SYNTAX;
965
966 goto quit;
967 }
968
969quit:
970 free(path);
971
972 return rc;
973}
974
975static int _ldap_url_parse (const struct connectdata *conn,
976 LDAPURLDesc **ludpp)
977{
978 LDAPURLDesc *ludp = calloc(1, sizeof(*ludp));
979 int rc;
980
981 *ludpp = NULL;
982 if(!ludp)
983 return LDAP_NO_MEMORY;
984
985 rc = _ldap_url_parse2 (conn, ludp);
986 if(rc != LDAP_SUCCESS) {
987 _ldap_free_urldesc(ludp);
988 ludp = NULL;
989 }
990 *ludpp = ludp;
991 return (rc);
992}
993
994static void _ldap_free_urldesc (LDAPURLDesc *ludp)
995{
996 size_t i;
997
998 if(!ludp)
999 return;
1000
1001 free(ludp->lud_dn);
1002 free(ludp->lud_filter);
1003
1004 if(ludp->lud_attrs) {
1005 for(i = 0; i < ludp->lud_attrs_dups; i++)
1006 free(ludp->lud_attrs[i]);
1007 free(ludp->lud_attrs);
1008 }
1009
1010 free (ludp);
1011}
1012#endif /* !HAVE_LDAP_URL_PARSE */
1013#endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */
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