ldap.c@ 108333

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curl-8.11.1: Applied and adjusted our curl changes to 8.7.1. jiraref:VBP-1535
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1	/***************************************************************************
2	* _ _ ____ _
3	* Project ___\| \| \| \| _ \\| \|
4	* / __\| \| \| \| \|_) \| \|
5	* \| (__\| \|_\| \| _ <\| \|___
6	* \___\|\___/\|_\| \_\_____\|
7	*
8	* Copyright (C) Daniel Stenberg, <[email protected]>, 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	* SPDX-License-Identifier: curl
22	*
23	***************************************************************************/
24
25	#include "curl_setup.h"
26
27	#if !defined(CURL_DISABLE_LDAP) && !defined(USE_OPENLDAP)
28
29	/*
30	* Notice that USE_OPENLDAP is only a source code selection switch. When
31	* libcurl is built with USE_OPENLDAP defined the libcurl source code that
32	* gets compiled is the code from openldap.c, otherwise the code that gets
33	* compiled is the code from ldap.c.
34	*
35	* When USE_OPENLDAP is defined a recent version of the OpenLDAP library
36	* might be required for compilation and runtime. In order to use ancient
37	* OpenLDAP library versions, USE_OPENLDAP shall not be defined.
38	*/
39
40	/* Wincrypt must be included before anything that could include OpenSSL. */
41	#if defined(USE_WIN32_CRYPTO)
42	#include <wincrypt.h>
43	/* Undefine wincrypt conflicting symbols for BoringSSL. */
44	#undef X509_NAME
45	#undef X509_EXTENSIONS
46	#undef PKCS7_ISSUER_AND_SERIAL
47	#undef PKCS7_SIGNER_INFO
48	#undef OCSP_REQUEST
49	#undef OCSP_RESPONSE
50	#endif
51
52	#ifdef USE_WIN32_LDAP /* Use Windows LDAP implementation. */
53	# ifdef _MSC_VER
54	# pragma warning(push)
55	# pragma warning(disable: 4201)
56	# endif
57	# include <subauth.h> /* for [P]UNICODE_STRING */
58	# ifdef _MSC_VER
59	# pragma warning(pop)
60	# endif
61	# include <winldap.h>
62	# ifndef LDAP_VENDOR_NAME
63	# error Your Platform SDK is NOT sufficient for LDAP support! \
64	Update your Platform SDK, or disable LDAP support!
65	# else
66	# include <winber.h>
67	# endif
68	#else
69	# define LDAP_DEPRECATED 1 /* Be sure ldap_init() is defined. */
70	# ifdef HAVE_LBER_H
71	# include <lber.h>
72	# endif
73	# include <ldap.h>
74	# if (defined(HAVE_LDAP_SSL) && defined(HAVE_LDAP_SSL_H))
75	# include <ldap_ssl.h>
76	# endif /* HAVE_LDAP_SSL && HAVE_LDAP_SSL_H */
77	#endif
78
79	#include "urldata.h"
80	#include <curl/curl.h>
81	#include "sendf.h"
82	#include "escape.h"
83	#include "progress.h"
84	#include "transfer.h"
85	#include "strcase.h"
86	#include "strtok.h"
87	#include "curl_ldap.h"
88	#include "curl_multibyte.h"
89	#include "curl_base64.h"
90	#include "connect.h"
91	/* The last 3 #include files should be in this order */
92	#include "curl_printf.h"
93	#include "curl_memory.h"
94	#include "memdebug.h"
95
96	#ifndef HAVE_LDAP_URL_PARSE
97
98	/* Use our own implementation. */
99
100	struct ldap_urldesc {
101	char *lud_host;
102	int lud_port;
103	#if defined(USE_WIN32_LDAP)
104	TCHAR *lud_dn;
105	TCHAR **lud_attrs;
106	#else
107	char *lud_dn;
108	char **lud_attrs;
109	#endif
110	int lud_scope;
111	#if defined(USE_WIN32_LDAP)
112	TCHAR *lud_filter;
113	#else
114	char *lud_filter;
115	#endif
116	char **lud_exts;
117	size_t lud_attrs_dups; /* how many were dup'ed, this field is not in the
118	"real" struct so can only be used in code
119	without HAVE_LDAP_URL_PARSE defined */
120	};
121
122	#undef LDAPURLDesc
123	#define LDAPURLDesc struct ldap_urldesc
124
125	static int _ldap_url_parse(struct Curl_easy *data,
126	const struct connectdata *conn,
127	LDAPURLDesc **ludp);
128	static void _ldap_free_urldesc(LDAPURLDesc *ludp);
129
130	#undef ldap_free_urldesc
131	#define ldap_free_urldesc _ldap_free_urldesc
132	#endif
133
134	#ifdef DEBUG_LDAP
135	#define LDAP_TRACE(x) do { \
136	_ldap_trace("%u: ", __LINE__); \
137	_ldap_trace x; \
138	} while(0)
139
140	static void _ldap_trace(const char *fmt, ...) CURL_PRINTF(1, 2);
141	#else
142	#define LDAP_TRACE(x) Curl_nop_stmt
143	#endif
144
145	#if defined(USE_WIN32_LDAP) && defined(ldap_err2string)
146	/* Use ANSI error strings in Unicode builds */
147	#undef ldap_err2string
148	#define ldap_err2string ldap_err2stringA
149	#endif
150
151	#if defined(USE_WIN32_LDAP) && defined(_MSC_VER) && (_MSC_VER <= 1600)
152	/* Workaround for warning:
153	'type cast' : conversion from 'int' to 'void ' of greater size /
154	#undef LDAP_OPT_ON
155	#undef LDAP_OPT_OFF
156	#define LDAP_OPT_ON ((void *)(size_t)1)
157	#define LDAP_OPT_OFF ((void *)(size_t)0)
158	#endif
159
160	static CURLcode ldap_do(struct Curl_easy data, bool done);
161
162	/*
163	* LDAP protocol handler.
164	*/
165
166	const struct Curl_handler Curl_handler_ldap = {
167	"ldap", /* scheme */
168	ZERO_NULL, /* setup_connection */
169	ldap_do, /* do_it */
170	ZERO_NULL, /* done */
171	ZERO_NULL, /* do_more */
172	ZERO_NULL, /* connect_it */
173	ZERO_NULL, /* connecting */
174	ZERO_NULL, /* doing */
175	ZERO_NULL, /* proto_getsock */
176	ZERO_NULL, /* doing_getsock */
177	ZERO_NULL, /* domore_getsock */
178	ZERO_NULL, /* perform_getsock */
179	ZERO_NULL, /* disconnect */
180	ZERO_NULL, /* write_resp */
181	ZERO_NULL, /* write_resp_hd */
182	ZERO_NULL, /* connection_check */
183	ZERO_NULL, /* attach connection */
184	PORT_LDAP, /* defport */
185	CURLPROTO_LDAP, /* protocol */
186	CURLPROTO_LDAP, /* family */
187	PROTOPT_NONE /* flags */
188	};
189
190	#ifdef HAVE_LDAP_SSL
191	/*
192	* LDAPS protocol handler.
193	*/
194
195	const struct Curl_handler Curl_handler_ldaps = {
196	"ldaps", /* scheme */
197	ZERO_NULL, /* setup_connection */
198	ldap_do, /* do_it */
199	ZERO_NULL, /* done */
200	ZERO_NULL, /* do_more */
201	ZERO_NULL, /* connect_it */
202	ZERO_NULL, /* connecting */
203	ZERO_NULL, /* doing */
204	ZERO_NULL, /* proto_getsock */
205	ZERO_NULL, /* doing_getsock */
206	ZERO_NULL, /* domore_getsock */
207	ZERO_NULL, /* perform_getsock */
208	ZERO_NULL, /* disconnect */
209	ZERO_NULL, /* write_resp */
210	ZERO_NULL, /* write_resp_hd */
211	ZERO_NULL, /* connection_check */
212	ZERO_NULL, /* attach connection */
213	PORT_LDAPS, /* defport */
214	CURLPROTO_LDAPS, /* protocol */
215	CURLPROTO_LDAP, /* family */
216	PROTOPT_SSL /* flags */
217	};
218	#endif
219
220	#if defined(USE_WIN32_LDAP)
221
222	#if defined(USE_WINDOWS_SSPI)
223	static int ldap_win_bind_auth(LDAP server, const char user,
224	const char *passwd, unsigned long authflags)
225	{
226	ULONG method = 0;
227	SEC_WINNT_AUTH_IDENTITY cred;
228	int rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
229
230	memset(&cred, 0, sizeof(cred));
231
232	#if defined(USE_SPNEGO)
233	if(authflags & CURLAUTH_NEGOTIATE) {
234	method = LDAP_AUTH_NEGOTIATE;
235	}
236	else
237	#endif
238	#if defined(USE_NTLM)
239	if(authflags & CURLAUTH_NTLM) {
240	method = LDAP_AUTH_NTLM;
241	}
242	else
243	#endif
244	#if !defined(CURL_DISABLE_DIGEST_AUTH)
245	if(authflags & CURLAUTH_DIGEST) {
246	method = LDAP_AUTH_DIGEST;
247	}
248	else
249	#endif
250	{
251	/* required anyway if one of upper preprocessor definitions enabled */
252	}
253
254	if(method && user && passwd) {
255	CURLcode res = Curl_create_sspi_identity(user, passwd, &cred);
256	rc = (int)res;
257	if(!rc) {
258	rc = (int)ldap_bind_s(server, NULL, (TCHAR *)&cred, method);
259	Curl_sspi_free_identity(&cred);
260	}
261	}
262	else {
263	/* proceed with current user credentials */
264	method = LDAP_AUTH_NEGOTIATE;
265	rc = (int)ldap_bind_s(server, NULL, NULL, method);
266	}
267	return rc;
268	}
269	#endif /* #if defined(USE_WINDOWS_SSPI) */
270
271	static int ldap_win_bind(struct Curl_easy data, LDAP server,
272	const char user, const char passwd)
273	{
274	int rc = LDAP_INVALID_CREDENTIALS;
275
276	PTCHAR inuser = NULL;
277	PTCHAR inpass = NULL;
278
279	if(user && passwd && (data->set.httpauth & CURLAUTH_BASIC)) {
280	inuser = curlx_convert_UTF8_to_tchar((char *) user);
281	inpass = curlx_convert_UTF8_to_tchar((char *) passwd);
282
283	rc = (int)ldap_simple_bind_s(server, inuser, inpass);
284
285	curlx_unicodefree(inuser);
286	curlx_unicodefree(inpass);
287	}
288	#if defined(USE_WINDOWS_SSPI)
289	else {
290	rc = (int)ldap_win_bind_auth(server, user, passwd, data->set.httpauth);
291	}
292	#endif
293
294	return rc;
295	}
296	#endif /* #if defined(USE_WIN32_LDAP) */
297
298	#if defined(USE_WIN32_LDAP)
299	#define FREE_ON_WINLDAP(x) curlx_unicodefree(x)
300	#define curl_ldap_num_t ULONG
301	#else
302	#define FREE_ON_WINLDAP(x)
303	#define curl_ldap_num_t int
304	#endif
305
306
307	static CURLcode ldap_do(struct Curl_easy data, bool done)
308	{
309	CURLcode result = CURLE_OK;
310	int rc = 0;
311	LDAP *server = NULL;
312	LDAPURLDesc *ludp = NULL;
313	LDAPMessage *ldapmsg = NULL;
314	LDAPMessage *entryIterator;
315	int num = 0;
316	struct connectdata *conn = data->conn;
317	int ldap_proto = LDAP_VERSION3;
318	int ldap_ssl = 0;
319	char *val_b64 = NULL;
320	size_t val_b64_sz = 0;
321	#ifdef LDAP_OPT_NETWORK_TIMEOUT
322	struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */
323	#endif
324	#if defined(USE_WIN32_LDAP)
325	TCHAR *host = NULL;
326	#else
327	char *host = NULL;
328	#endif
329	char *user = NULL;
330	char *passwd = NULL;
331
332	done = TRUE; / unconditionally */
333	infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d",
334	LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
335	infof(data, "LDAP local: %s", data->state.url);
336
337	#ifdef HAVE_LDAP_URL_PARSE
338	rc = ldap_url_parse(data->state.url, &ludp);
339	#else
340	rc = _ldap_url_parse(data, conn, &ludp);
341	#endif
342	if(rc) {
343	failf(data, "Bad LDAP URL: %s", ldap_err2string((curl_ldap_num_t)rc));
344	result = CURLE_URL_MALFORMAT;
345	goto quit;
346	}
347
348	/* Get the URL scheme (either ldap or ldaps) */
349	if(conn->given->flags & PROTOPT_SSL)
350	ldap_ssl = 1;
351	infof(data, "LDAP local: trying to establish %s connection",
352	ldap_ssl ? "encrypted" : "cleartext");
353
354	#if defined(USE_WIN32_LDAP)
355	host = curlx_convert_UTF8_to_tchar(conn->host.name);
356	if(!host) {
357	result = CURLE_OUT_OF_MEMORY;
358
359	goto quit;
360	}
361	#else
362	host = conn->host.name;
363	#endif
364
365	if(data->state.aptr.user) {
366	user = conn->user;
367	passwd = conn->passwd;
368	}
369
370	#ifdef LDAP_OPT_NETWORK_TIMEOUT
371	ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
372	#endif
373	ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
374
375	if(ldap_ssl) {
376	#ifdef HAVE_LDAP_SSL
377	#ifdef USE_WIN32_LDAP
378	/* Win32 LDAP SDK does not support insecure mode without CA! */
379	server = ldap_sslinit(host, (curl_ldap_num_t)conn->primary.remote_port, 1);
380	ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
381	#else
382	int ldap_option;
383	char *ldap_ca = conn->ssl_config.CAfile;
384	#if defined(CURL_HAS_NOVELL_LDAPSDK)
385	rc = ldapssl_client_init(NULL, NULL);
386	if(rc != LDAP_SUCCESS) {
387	failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
388	result = CURLE_SSL_CERTPROBLEM;
389	goto quit;
390	}
391	if(conn->ssl_config.verifypeer) {
392	/* Novell SDK supports DER or BASE64 files. */
393	int cert_type = LDAPSSL_CERT_FILETYPE_B64;
394	if((data->set.ssl.cert_type) &&
395	(strcasecompare(data->set.ssl.cert_type, "DER")))
396	cert_type = LDAPSSL_CERT_FILETYPE_DER;
397	if(!ldap_ca) {
398	failf(data, "LDAP local: ERROR %s CA cert not set",
399	(cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
400	result = CURLE_SSL_CERTPROBLEM;
401	goto quit;
402	}
403	infof(data, "LDAP local: using %s CA cert '%s'",
404	(cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
405	ldap_ca);
406	rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
407	if(rc != LDAP_SUCCESS) {
408	failf(data, "LDAP local: ERROR setting %s CA cert: %s",
409	(cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
410	ldap_err2string(rc));
411	result = CURLE_SSL_CERTPROBLEM;
412	goto quit;
413	}
414	ldap_option = LDAPSSL_VERIFY_SERVER;
415	}
416	else
417	ldap_option = LDAPSSL_VERIFY_NONE;
418	rc = ldapssl_set_verify_mode(ldap_option);
419	if(rc != LDAP_SUCCESS) {
420	failf(data, "LDAP local: ERROR setting cert verify mode: %s",
421	ldap_err2string(rc));
422	result = CURLE_SSL_CERTPROBLEM;
423	goto quit;
424	}
425	server = ldapssl_init(host, conn->primary.remote_port, 1);
426	if(!server) {
427	failf(data, "LDAP local: Cannot connect to %s:%u",
428	conn->host.dispname, conn->primary.remote_port);
429	result = CURLE_COULDNT_CONNECT;
430	goto quit;
431	}
432	#elif defined(LDAP_OPT_X_TLS)
433	if(conn->ssl_config.verifypeer) {
434	/* OpenLDAP SDK supports BASE64 files. */
435	if((data->set.ssl.cert_type) &&
436	(!strcasecompare(data->set.ssl.cert_type, "PEM"))) {
437	failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type");
438	result = CURLE_SSL_CERTPROBLEM;
439	goto quit;
440	}
441	if(!ldap_ca) {
442	failf(data, "LDAP local: ERROR PEM CA cert not set");
443	result = CURLE_SSL_CERTPROBLEM;
444	goto quit;
445	}
446	infof(data, "LDAP local: using PEM CA cert: %s", ldap_ca);
447	rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
448	if(rc != LDAP_SUCCESS) {
449	failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
450	ldap_err2string(rc));
451	result = CURLE_SSL_CERTPROBLEM;
452	goto quit;
453	}
454	ldap_option = LDAP_OPT_X_TLS_DEMAND;
455	}
456	else
457	ldap_option = LDAP_OPT_X_TLS_NEVER;
458
459	rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option);
460	if(rc != LDAP_SUCCESS) {
461	failf(data, "LDAP local: ERROR setting cert verify mode: %s",
462	ldap_err2string(rc));
463	result = CURLE_SSL_CERTPROBLEM;
464	goto quit;
465	}
466	server = ldap_init(host, conn->primary.remote_port);
467	if(!server) {
468	failf(data, "LDAP local: Cannot connect to %s:%u",
469	conn->host.dispname, conn->primary.remote_port);
470	result = CURLE_COULDNT_CONNECT;
471	goto quit;
472	}
473	ldap_option = LDAP_OPT_X_TLS_HARD;
474	rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
475	if(rc != LDAP_SUCCESS) {
476	failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
477	ldap_err2string(rc));
478	result = CURLE_SSL_CERTPROBLEM;
479	goto quit;
480	}
481	/*
482	rc = ldap_start_tls_s(server, NULL, NULL);
483	if(rc != LDAP_SUCCESS) {
484	failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
485	ldap_err2string(rc));
486	result = CURLE_SSL_CERTPROBLEM;
487	goto quit;
488	}
489	*/
490	#else
491	(void)ldap_option;
492	(void)ldap_ca;
493	/* we should probably never come up to here since configure
494	should check in first place if we can support LDAP SSL/TLS */
495	failf(data, "LDAP local: SSL/TLS not supported with this version "
496	"of the OpenLDAP toolkit\n");
497	result = CURLE_SSL_CERTPROBLEM;
498	goto quit;
499	#endif
500	#endif
501	#endif /* CURL_LDAP_USE_SSL */
502	}
503	else if(data->set.use_ssl > CURLUSESSL_TRY) {
504	failf(data, "LDAP local: explicit TLS not supported");
505	result = CURLE_NOT_BUILT_IN;
506	goto quit;
507	}
508	else {
509	server = ldap_init(host, (curl_ldap_num_t)conn->primary.remote_port);
510	if(!server) {
511	failf(data, "LDAP local: Cannot connect to %s:%u",
512	conn->host.dispname, conn->primary.remote_port);
513	result = CURLE_COULDNT_CONNECT;
514	goto quit;
515	}
516	}
517	#ifdef USE_WIN32_LDAP
518	ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
519	rc = ldap_win_bind(data, server, user, passwd);
520	#else
521	rc = ldap_simple_bind_s(server, user, passwd);
522	#endif
523	if(!ldap_ssl && rc) {
524	ldap_proto = LDAP_VERSION2;
525	ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
526	#ifdef USE_WIN32_LDAP
527	rc = ldap_win_bind(data, server, user, passwd);
528	#else
529	rc = ldap_simple_bind_s(server, user, passwd);
530	#endif
531	}
532	if(rc) {
533	#ifdef USE_WIN32_LDAP
534	failf(data, "LDAP local: bind via ldap_win_bind %s",
535	ldap_err2string((ULONG)rc));
536	#else
537	failf(data, "LDAP local: bind via ldap_simple_bind_s %s",
538	ldap_err2string(rc));
539	#endif
540	result = CURLE_LDAP_CANNOT_BIND;
541	goto quit;
542	}
543
544	Curl_pgrsSetDownloadCounter(data, 0);
545	rc = (int)ldap_search_s(server, ludp->lud_dn,
546	(curl_ldap_num_t)ludp->lud_scope,
547	ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
548
549	if(rc && rc != LDAP_SIZELIMIT_EXCEEDED) {
550	failf(data, "LDAP remote: %s", ldap_err2string((curl_ldap_num_t)rc));
551	result = CURLE_LDAP_SEARCH_FAILED;
552	goto quit;
553	}
554
555	num = 0;
556	for(entryIterator = ldap_first_entry(server, ldapmsg);
557	entryIterator;
558	entryIterator = ldap_next_entry(server, entryIterator), num++) {
559	BerElement *ber = NULL;
560	#if defined(USE_WIN32_LDAP)
561	TCHAR *attribute;
562	#else
563	char *attribute;
564	#endif
565	int i;
566
567	/* Get the DN and write it to the client */
568	{
569	char *name;
570	size_t name_len;
571	#if defined(USE_WIN32_LDAP)
572	TCHAR *dn = ldap_get_dn(server, entryIterator);
573	name = curlx_convert_tchar_to_UTF8(dn);
574	if(!name) {
575	ldap_memfree(dn);
576
577	result = CURLE_OUT_OF_MEMORY;
578
579	goto quit;
580	}
581	#else
582	char *dn = name = ldap_get_dn(server, entryIterator);
583	#endif
584	name_len = strlen(name);
585
586	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"DN: ", 4);
587	if(result) {
588	FREE_ON_WINLDAP(name);
589	ldap_memfree(dn);
590	goto quit;
591	}
592
593	result = Curl_client_write(data, CLIENTWRITE_BODY, name, name_len);
594	if(result) {
595	FREE_ON_WINLDAP(name);
596	ldap_memfree(dn);
597	goto quit;
598	}
599
600	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
601	if(result) {
602	FREE_ON_WINLDAP(name);
603	ldap_memfree(dn);
604
605	goto quit;
606	}
607
608	FREE_ON_WINLDAP(name);
609	ldap_memfree(dn);
610	}
611
612	/* Get the attributes and write them to the client */
613	for(attribute = ldap_first_attribute(server, entryIterator, &ber);
614	attribute;
615	attribute = ldap_next_attribute(server, entryIterator, ber)) {
616	BerValue **vals;
617	size_t attr_len;
618	#if defined(USE_WIN32_LDAP)
619	char *attr = curlx_convert_tchar_to_UTF8(attribute);
620	if(!attr) {
621	if(ber)
622	ber_free(ber, 0);
623
624	result = CURLE_OUT_OF_MEMORY;
625
626	goto quit;
627	}
628	#else
629	char *attr = attribute;
630	#endif
631	attr_len = strlen(attr);
632
633	vals = ldap_get_values_len(server, entryIterator, attribute);
634	if(vals) {
635	for(i = 0; (vals[i] != NULL); i++) {
636	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\t", 1);
637	if(result) {
638	ldap_value_free_len(vals);
639	FREE_ON_WINLDAP(attr);
640	ldap_memfree(attribute);
641	if(ber)
642	ber_free(ber, 0);
643
644	goto quit;
645	}
646
647	result = Curl_client_write(data, CLIENTWRITE_BODY, attr, attr_len);
648	if(result) {
649	ldap_value_free_len(vals);
650	FREE_ON_WINLDAP(attr);
651	ldap_memfree(attribute);
652	if(ber)
653	ber_free(ber, 0);
654
655	goto quit;
656	}
657
658	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)": ", 2);
659	if(result) {
660	ldap_value_free_len(vals);
661	FREE_ON_WINLDAP(attr);
662	ldap_memfree(attribute);
663	if(ber)
664	ber_free(ber, 0);
665
666	goto quit;
667	}
668
669	if((attr_len > 7) &&
670	(strcmp(";binary", attr + (attr_len - 7)) == 0)) {
671	/* Binary attribute, encode to base64. */
672	result = Curl_base64_encode(vals[i]->bv_val, vals[i]->bv_len,
673	&val_b64, &val_b64_sz);
674	if(result) {
675	ldap_value_free_len(vals);
676	FREE_ON_WINLDAP(attr);
677	ldap_memfree(attribute);
678	if(ber)
679	ber_free(ber, 0);
680
681	goto quit;
682	}
683
684	if(val_b64_sz > 0) {
685	result = Curl_client_write(data, CLIENTWRITE_BODY, val_b64,
686	val_b64_sz);
687	free(val_b64);
688	if(result) {
689	ldap_value_free_len(vals);
690	FREE_ON_WINLDAP(attr);
691	ldap_memfree(attribute);
692	if(ber)
693	ber_free(ber, 0);
694
695	goto quit;
696	}
697	}
698	}
699	else {
700	result = Curl_client_write(data, CLIENTWRITE_BODY, vals[i]->bv_val,
701	vals[i]->bv_len);
702	if(result) {
703	ldap_value_free_len(vals);
704	FREE_ON_WINLDAP(attr);
705	ldap_memfree(attribute);
706	if(ber)
707	ber_free(ber, 0);
708
709	goto quit;
710	}
711	}
712
713	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
714	if(result) {
715	ldap_value_free_len(vals);
716	FREE_ON_WINLDAP(attr);
717	ldap_memfree(attribute);
718	if(ber)
719	ber_free(ber, 0);
720
721	goto quit;
722	}
723	}
724
725	/* Free memory used to store values */
726	ldap_value_free_len(vals);
727	}
728
729	/* Free the attribute as we are done with it */
730	FREE_ON_WINLDAP(attr);
731	ldap_memfree(attribute);
732
733	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
734	if(result)
735	goto quit;
736	}
737
738	if(ber)
739	ber_free(ber, 0);
740	}
741
742	quit:
743	if(ldapmsg) {
744	ldap_msgfree(ldapmsg);
745	LDAP_TRACE(("Received %d entries\n", num));
746	}
747	if(rc == LDAP_SIZELIMIT_EXCEEDED)
748	infof(data, "There are more than %d entries", num);
749	if(ludp)
750	ldap_free_urldesc(ludp);
751	if(server)
752	ldap_unbind_s(server);
753	#if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
754	if(ldap_ssl)
755	ldapssl_client_deinit();
756	#endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
757
758	FREE_ON_WINLDAP(host);
759
760	/* no data to transfer */
761	Curl_xfer_setup_nop(data);
762	connclose(conn, "LDAP connection always disable reuse");
763
764	return result;
765	}
766
767	#ifdef DEBUG_LDAP
768	static void _ldap_trace(const char *fmt, ...)
769	{
770	static int do_trace = -1;
771	va_list args;
772
773	if(do_trace == -1) {
774	const char *env = getenv("CURL_TRACE");
775	do_trace = (env && strtol(env, NULL, 10) > 0);
776	}
777	if(!do_trace)
778	return;
779
780	va_start(args, fmt);
781	vfprintf(stderr, fmt, args);
782	va_end(args);
783	}
784	#endif
785
786	#ifndef HAVE_LDAP_URL_PARSE
787
788	/*
789	* Return scope-value for a scope-string.
790	*/
791	static int str2scope(const char *p)
792	{
793	if(strcasecompare(p, "one"))
794	return LDAP_SCOPE_ONELEVEL;
795	if(strcasecompare(p, "onetree"))
796	return LDAP_SCOPE_ONELEVEL;
797	if(strcasecompare(p, "base"))
798	return LDAP_SCOPE_BASE;
799	if(strcasecompare(p, "sub"))
800	return LDAP_SCOPE_SUBTREE;
801	if(strcasecompare(p, "subtree"))
802	return LDAP_SCOPE_SUBTREE;
803	return (-1);
804	}
805
806	/*
807	* Split 'str' into strings separated by commas.
808	* Note: out[] points into 'str'.
809	*/
810	static bool split_str(char str, char *out, size_t count)
811	{
812	char **res;
813	char *lasts;
814	char *s;
815	size_t i;
816	size_t items = 1;
817
818	s = strchr(str, ',');
819	while(s) {
820	items++;
821	s = strchr(++s, ',');
822	}
823
824	res = calloc(items, sizeof(char *));
825	if(!res)
826	return FALSE;
827
828	for(i = 0, s = Curl_strtok_r(str, ",", &lasts); s && i < items;
829	s = Curl_strtok_r(NULL, ",", &lasts), i++)
830	res[i] = s;
831
832	*out = res;
833	*count = items;
834
835	return TRUE;
836	}
837
838	/*
839	* Break apart the pieces of an LDAP URL.
840	* Syntax:
841	* ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
842	*
843	* <hostname> already known from 'conn->host.name'.
844	* <port> already known from 'conn->remote_port'.
845	* extract the rest from 'data->state.path+1'. All fields are optional.
846	* e.g.
847	* ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
848	* yields ludp->lud_dn = "".
849	*
850	* Defined in RFC4516 section 2.
851	*/
852	static int _ldap_url_parse2(struct Curl_easy *data,
853	const struct connectdata conn, LDAPURLDesc ludp)
854	{
855	int rc = LDAP_SUCCESS;
856	char *p;
857	char *path;
858	char *q = NULL;
859	char *query = NULL;
860	size_t i;
861
862	if(!data \|\|
863	!data->state.up.path \|\|
864	data->state.up.path[0] != '/' \|\|
865	!strncasecompare("LDAP", data->state.up.scheme, 4))
866	return LDAP_INVALID_SYNTAX;
867
868	ludp->lud_scope = LDAP_SCOPE_BASE;
869	ludp->lud_port = conn->remote_port;
870	ludp->lud_host = conn->host.name;
871
872	/* Duplicate the path */
873	p = path = strdup(data->state.up.path + 1);
874	if(!path)
875	return LDAP_NO_MEMORY;
876
877	/* Duplicate the query if present */
878	if(data->state.up.query) {
879	q = query = strdup(data->state.up.query);
880	if(!query) {
881	free(path);
882	return LDAP_NO_MEMORY;
883	}
884	}
885
886	/* Parse the DN (Distinguished Name) */
887	if(*p) {
888	char *dn = p;
889	char *unescaped;
890	CURLcode result;
891
892	LDAP_TRACE(("DN '%s'\n", dn));
893
894	/* Unescape the DN */
895	result = Curl_urldecode(dn, 0, &unescaped, NULL, REJECT_ZERO);
896	if(result) {
897	rc = LDAP_NO_MEMORY;
898
899	goto quit;
900	}
901
902	#if defined(USE_WIN32_LDAP)
903	/* Convert the unescaped string to a tchar */
904	ludp->lud_dn = curlx_convert_UTF8_to_tchar(unescaped);
905
906	/* Free the unescaped string as we are done with it */
907	free(unescaped);
908
909	if(!ludp->lud_dn) {
910	rc = LDAP_NO_MEMORY;
911
912	goto quit;
913	}
914	#else
915	ludp->lud_dn = unescaped;
916	#endif
917	}
918
919	p = q;
920	if(!p)
921	goto quit;
922
923	/* Parse the attributes. skip "??" */
924	q = strchr(p, '?');
925	if(q)
926	*q++ = '\0';
927
928	if(*p) {
929	char **attributes;
930	size_t count = 0;
931
932	/* Split the string into an array of attributes */
933	if(!split_str(p, &attributes, &count)) {
934	rc = LDAP_NO_MEMORY;
935
936	goto quit;
937	}
938
939	/* Allocate our array (+1 for the NULL entry) */
940	#if defined(USE_WIN32_LDAP)
941	ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *));
942	#else
943	ludp->lud_attrs = calloc(count + 1, sizeof(char *));
944	#endif
945	if(!ludp->lud_attrs) {
946	free(attributes);
947
948	rc = LDAP_NO_MEMORY;
949
950	goto quit;
951	}
952
953	for(i = 0; i < count; i++) {
954	char *unescaped;
955	CURLcode result;
956
957	LDAP_TRACE(("attr[%zu] '%s'\n", i, attributes[i]));
958
959	/* Unescape the attribute */
960	result = Curl_urldecode(attributes[i], 0, &unescaped, NULL,
961	REJECT_ZERO);
962	if(result) {
963	free(attributes);
964
965	rc = LDAP_NO_MEMORY;
966
967	goto quit;
968	}
969
970	#if defined(USE_WIN32_LDAP)
971	/* Convert the unescaped string to a tchar */
972	ludp->lud_attrs[i] = curlx_convert_UTF8_to_tchar(unescaped);
973
974	/* Free the unescaped string as we are done with it */
975	free(unescaped);
976
977	if(!ludp->lud_attrs[i]) {
978	free(attributes);
979
980	rc = LDAP_NO_MEMORY;
981
982	goto quit;
983	}
984	#else
985	ludp->lud_attrs[i] = unescaped;
986	#endif
987
988	ludp->lud_attrs_dups++;
989	}
990
991	free(attributes);
992	}
993
994	p = q;
995	if(!p)
996	goto quit;
997
998	/* Parse the scope. skip "??" */
999	q = strchr(p, '?');
1000	if(q)
1001	*q++ = '\0';
1002
1003	if(*p) {
1004	ludp->lud_scope = str2scope(p);
1005	if(ludp->lud_scope == -1) {
1006	rc = LDAP_INVALID_SYNTAX;
1007
1008	goto quit;
1009	}
1010	LDAP_TRACE(("scope %d\n", ludp->lud_scope));
1011	}
1012
1013	p = q;
1014	if(!p)
1015	goto quit;
1016
1017	/* Parse the filter */
1018	q = strchr(p, '?');
1019	if(q)
1020	*q++ = '\0';
1021
1022	if(*p) {
1023	char *filter = p;
1024	char *unescaped;
1025	CURLcode result;
1026
1027	LDAP_TRACE(("filter '%s'\n", filter));
1028
1029	/* Unescape the filter */
1030	result = Curl_urldecode(filter, 0, &unescaped, NULL, REJECT_ZERO);
1031	if(result) {
1032	rc = LDAP_NO_MEMORY;
1033
1034	goto quit;
1035	}
1036
1037	#if defined(USE_WIN32_LDAP)
1038	/* Convert the unescaped string to a tchar */
1039	ludp->lud_filter = curlx_convert_UTF8_to_tchar(unescaped);
1040
1041	/* Free the unescaped string as we are done with it */
1042	free(unescaped);
1043
1044	if(!ludp->lud_filter) {
1045	rc = LDAP_NO_MEMORY;
1046
1047	goto quit;
1048	}
1049	#else
1050	ludp->lud_filter = unescaped;
1051	#endif
1052	}
1053
1054	p = q;
1055	if(p && !*p) {
1056	rc = LDAP_INVALID_SYNTAX;
1057
1058	goto quit;
1059	}
1060
1061	quit:
1062	free(path);
1063	free(query);
1064
1065	return rc;
1066	}
1067
1068	static int _ldap_url_parse(struct Curl_easy *data,
1069	const struct connectdata *conn,
1070	LDAPURLDesc **ludpp)
1071	{
1072	LDAPURLDesc ludp = calloc(1, sizeof(ludp));
1073	int rc;
1074
1075	*ludpp = NULL;
1076	if(!ludp)
1077	return LDAP_NO_MEMORY;
1078
1079	rc = _ldap_url_parse2(data, conn, ludp);
1080	if(rc != LDAP_SUCCESS) {
1081	_ldap_free_urldesc(ludp);
1082	ludp = NULL;
1083	}
1084	*ludpp = ludp;
1085	return (rc);
1086	}
1087
1088	static void _ldap_free_urldesc(LDAPURLDesc *ludp)
1089	{
1090	if(!ludp)
1091	return;
1092
1093	#if defined(USE_WIN32_LDAP)
1094	curlx_unicodefree(ludp->lud_dn);
1095	curlx_unicodefree(ludp->lud_filter);
1096	#else
1097	free(ludp->lud_dn);
1098	free(ludp->lud_filter);
1099	#endif
1100
1101	if(ludp->lud_attrs) {
1102	size_t i;
1103	for(i = 0; i < ludp->lud_attrs_dups; i++) {
1104	#if defined(USE_WIN32_LDAP)
1105	curlx_unicodefree(ludp->lud_attrs[i]);
1106	#else
1107	free(ludp->lud_attrs[i]);
1108	#endif
1109	}
1110	free(ludp->lud_attrs);
1111	}
1112
1113	free(ludp);
1114	}
1115	#endif /* !HAVE_LDAP_URL_PARSE */
1116	#endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */

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