ldap.c@ 97122

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libs/{curl,libxml2}: OSE export fixes, bugref:8515
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1	/***************************************************************************
2	* _ _ ____ _
3	* Project ___\| \| \| \| _ \\| \|
4	* / __\| \| \| \| \|_) \| \|
5	* \| (__\| \|_\| \| _ <\| \|___
6	* \___\|\___/\|_\| \_\_____\|
7	*
8	* Copyright (C) 1998 - 2022, 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	***************************************************************************/
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
78	struct 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
103	static int _ldap_url_parse(struct Curl_easy *data,
104	const struct connectdata *conn,
105	LDAPURLDesc **ludp);
106	static 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
130	static CURLcode ldap_do(struct Curl_easy data, bool done);
131
132	/*
133	* LDAP protocol handler.
134	*/
135
136	const 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
164	const 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)
191	static 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
238	static 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
272	static 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, "Bad LDAP URL: %s", ldap_err2string(rc));
310	result = CURLE_URL_MALFORMAT;
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(data->state.aptr.user) {
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 if(data->set.use_ssl > CURLUSESSL_TRY) {
468	failf(data, "LDAP local: explicit TLS not supported");
469	result = CURLE_NOT_BUILT_IN;
470	goto quit;
471	}
472	else {
473	server = ldap_init(host, (int)conn->port);
474	if(!server) {
475	failf(data, "LDAP local: Cannot connect to %s:%ld",
476	conn->host.dispname, conn->port);
477	result = CURLE_COULDNT_CONNECT;
478	goto quit;
479	}
480	}
481	#ifdef USE_WIN32_LDAP
482	ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
483	rc = ldap_win_bind(data, server, user, passwd);
484	#else
485	rc = ldap_simple_bind_s(server, user, passwd);
486	#endif
487	if(!ldap_ssl && rc) {
488	ldap_proto = LDAP_VERSION2;
489	ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
490	#ifdef USE_WIN32_LDAP
491	rc = ldap_win_bind(data, server, user, passwd);
492	#else
493	rc = ldap_simple_bind_s(server, user, passwd);
494	#endif
495	}
496	if(rc) {
497	#ifdef USE_WIN32_LDAP
498	failf(data, "LDAP local: bind via ldap_win_bind %s",
499	ldap_err2string(rc));
500	#else
501	failf(data, "LDAP local: bind via ldap_simple_bind_s %s",
502	ldap_err2string(rc));
503	#endif
504	result = CURLE_LDAP_CANNOT_BIND;
505	goto quit;
506	}
507
508	rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
509	ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
510
511	if(rc && rc != LDAP_SIZELIMIT_EXCEEDED) {
512	failf(data, "LDAP remote: %s", ldap_err2string(rc));
513	result = CURLE_LDAP_SEARCH_FAILED;
514	goto quit;
515	}
516
517	for(num = 0, entryIterator = ldap_first_entry(server, ldapmsg);
518	entryIterator;
519	entryIterator = ldap_next_entry(server, entryIterator), num++) {
520	BerElement *ber = NULL;
521	#if defined(USE_WIN32_LDAP)
522	TCHAR *attribute;
523	#else
524	char *attribute;
525	#endif
526	int i;
527
528	/* Get the DN and write it to the client */
529	{
530	char *name;
531	size_t name_len;
532	#if defined(USE_WIN32_LDAP)
533	TCHAR *dn = ldap_get_dn(server, entryIterator);
534	name = curlx_convert_tchar_to_UTF8(dn);
535	if(!name) {
536	ldap_memfree(dn);
537
538	result = CURLE_OUT_OF_MEMORY;
539
540	goto quit;
541	}
542	#else
543	char *dn = name = ldap_get_dn(server, entryIterator);
544	#endif
545	name_len = strlen(name);
546
547	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"DN: ", 4);
548	if(result) {
549	FREE_ON_WINLDAP(name);
550	ldap_memfree(dn);
551	goto quit;
552	}
553
554	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *) name,
555	name_len);
556	if(result) {
557	FREE_ON_WINLDAP(name);
558	ldap_memfree(dn);
559	goto quit;
560	}
561
562	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
563	if(result) {
564	FREE_ON_WINLDAP(name);
565	ldap_memfree(dn);
566
567	goto quit;
568	}
569
570	dlsize += name_len + 5;
571
572	FREE_ON_WINLDAP(name);
573	ldap_memfree(dn);
574	}
575
576	/* Get the attributes and write them to the client */
577	for(attribute = ldap_first_attribute(server, entryIterator, &ber);
578	attribute;
579	attribute = ldap_next_attribute(server, entryIterator, ber)) {
580	BerValue **vals;
581	size_t attr_len;
582	#if defined(USE_WIN32_LDAP)
583	char *attr = curlx_convert_tchar_to_UTF8(attribute);
584	if(!attr) {
585	if(ber)
586	ber_free(ber, 0);
587
588	result = CURLE_OUT_OF_MEMORY;
589
590	goto quit;
591	}
592	#else
593	char *attr = attribute;
594	#endif
595	attr_len = strlen(attr);
596
597	vals = ldap_get_values_len(server, entryIterator, attribute);
598	if(vals) {
599	for(i = 0; (vals[i] != NULL); i++) {
600	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\t", 1);
601	if(result) {
602	ldap_value_free_len(vals);
603	FREE_ON_WINLDAP(attr);
604	ldap_memfree(attribute);
605	if(ber)
606	ber_free(ber, 0);
607
608	goto quit;
609	}
610
611	result = Curl_client_write(data, CLIENTWRITE_BODY,
612	(char *) attr, attr_len);
613	if(result) {
614	ldap_value_free_len(vals);
615	FREE_ON_WINLDAP(attr);
616	ldap_memfree(attribute);
617	if(ber)
618	ber_free(ber, 0);
619
620	goto quit;
621	}
622
623	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)": ", 2);
624	if(result) {
625	ldap_value_free_len(vals);
626	FREE_ON_WINLDAP(attr);
627	ldap_memfree(attribute);
628	if(ber)
629	ber_free(ber, 0);
630
631	goto quit;
632	}
633
634	dlsize += attr_len + 3;
635
636	if((attr_len > 7) &&
637	(strcmp(";binary", (char *) attr + (attr_len - 7)) == 0)) {
638	/* Binary attribute, encode to base64. */
639	result = Curl_base64_encode(vals[i]->bv_val, vals[i]->bv_len,
640	&val_b64, &val_b64_sz);
641	if(result) {
642	ldap_value_free_len(vals);
643	FREE_ON_WINLDAP(attr);
644	ldap_memfree(attribute);
645	if(ber)
646	ber_free(ber, 0);
647
648	goto quit;
649	}
650
651	if(val_b64_sz > 0) {
652	result = Curl_client_write(data, CLIENTWRITE_BODY, val_b64,
653	val_b64_sz);
654	free(val_b64);
655	if(result) {
656	ldap_value_free_len(vals);
657	FREE_ON_WINLDAP(attr);
658	ldap_memfree(attribute);
659	if(ber)
660	ber_free(ber, 0);
661
662	goto quit;
663	}
664
665	dlsize += val_b64_sz;
666	}
667	}
668	else {
669	result = Curl_client_write(data, CLIENTWRITE_BODY, vals[i]->bv_val,
670	vals[i]->bv_len);
671	if(result) {
672	ldap_value_free_len(vals);
673	FREE_ON_WINLDAP(attr);
674	ldap_memfree(attribute);
675	if(ber)
676	ber_free(ber, 0);
677
678	goto quit;
679	}
680
681	dlsize += vals[i]->bv_len;
682	}
683
684	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
685	if(result) {
686	ldap_value_free_len(vals);
687	FREE_ON_WINLDAP(attr);
688	ldap_memfree(attribute);
689	if(ber)
690	ber_free(ber, 0);
691
692	goto quit;
693	}
694
695	dlsize++;
696	}
697
698	/* Free memory used to store values */
699	ldap_value_free_len(vals);
700	}
701
702	/* Free the attribute as we are done with it */
703	FREE_ON_WINLDAP(attr);
704	ldap_memfree(attribute);
705
706	result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
707	if(result)
708	goto quit;
709	dlsize++;
710	Curl_pgrsSetDownloadCounter(data, dlsize);
711	}
712
713	if(ber)
714	ber_free(ber, 0);
715	}
716
717	quit:
718	if(ldapmsg) {
719	ldap_msgfree(ldapmsg);
720	LDAP_TRACE(("Received %d entries\n", num));
721	}
722	if(rc == LDAP_SIZELIMIT_EXCEEDED)
723	infof(data, "There are more than %d entries", num);
724	if(ludp)
725	ldap_free_urldesc(ludp);
726	if(server)
727	ldap_unbind_s(server);
728	#if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
729	if(ldap_ssl)
730	ldapssl_client_deinit();
731	#endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
732
733	FREE_ON_WINLDAP(host);
734
735	/* no data to transfer */
736	Curl_setup_transfer(data, -1, -1, FALSE, -1);
737	connclose(conn, "LDAP connection always disable re-use");
738
739	return result;
740	}
741
742	#ifdef DEBUG_LDAP
743	static void _ldap_trace(const char *fmt, ...)
744	{
745	static int do_trace = -1;
746	va_list args;
747
748	if(do_trace == -1) {
749	const char *env = getenv("CURL_TRACE");
750	do_trace = (env && strtol(env, NULL, 10) > 0);
751	}
752	if(!do_trace)
753	return;
754
755	va_start(args, fmt);
756	vfprintf(stderr, fmt, args);
757	va_end(args);
758	}
759	#endif
760
761	#ifndef HAVE_LDAP_URL_PARSE
762
763	/*
764	* Return scope-value for a scope-string.
765	*/
766	static int str2scope(const char *p)
767	{
768	if(strcasecompare(p, "one"))
769	return LDAP_SCOPE_ONELEVEL;
770	if(strcasecompare(p, "onetree"))
771	return LDAP_SCOPE_ONELEVEL;
772	if(strcasecompare(p, "base"))
773	return LDAP_SCOPE_BASE;
774	if(strcasecompare(p, "sub"))
775	return LDAP_SCOPE_SUBTREE;
776	if(strcasecompare(p, "subtree"))
777	return LDAP_SCOPE_SUBTREE;
778	return (-1);
779	}
780
781	/*
782	* Split 'str' into strings separated by commas.
783	* Note: out[] points into 'str'.
784	*/
785	static bool split_str(char str, char *out, size_t count)
786	{
787	char **res;
788	char *lasts;
789	char *s;
790	size_t i;
791	size_t items = 1;
792
793	s = strchr(str, ',');
794	while(s) {
795	items++;
796	s = strchr(++s, ',');
797	}
798
799	res = calloc(items, sizeof(char *));
800	if(!res)
801	return FALSE;
802
803	for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items;
804	s = strtok_r(NULL, ",", &lasts), i++)
805	res[i] = s;
806
807	*out = res;
808	*count = items;
809
810	return TRUE;
811	}
812
813	/*
814	* Break apart the pieces of an LDAP URL.
815	* Syntax:
816	* ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
817	*
818	* <hostname> already known from 'conn->host.name'.
819	* <port> already known from 'conn->remote_port'.
820	* extract the rest from 'data->state.path+1'. All fields are optional.
821	* e.g.
822	* ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
823	* yields ludp->lud_dn = "".
824	*
825	* Defined in RFC4516 section 2.
826	*/
827	static int _ldap_url_parse2(struct Curl_easy *data,
828	const struct connectdata conn, LDAPURLDesc ludp)
829	{
830	int rc = LDAP_SUCCESS;
831	char *p;
832	char *path;
833	char *q = NULL;
834	char *query = NULL;
835	size_t i;
836
837	if(!data \|\|
838	!data->state.up.path \|\|
839	data->state.up.path[0] != '/' \|\|
840	!strncasecompare("LDAP", data->state.up.scheme, 4))
841	return LDAP_INVALID_SYNTAX;
842
843	ludp->lud_scope = LDAP_SCOPE_BASE;
844	ludp->lud_port = conn->remote_port;
845	ludp->lud_host = conn->host.name;
846
847	/* Duplicate the path */
848	p = path = strdup(data->state.up.path + 1);
849	if(!path)
850	return LDAP_NO_MEMORY;
851
852	/* Duplicate the query if present */
853	if(data->state.up.query) {
854	q = query = strdup(data->state.up.query);
855	if(!query) {
856	free(path);
857	return LDAP_NO_MEMORY;
858	}
859	}
860
861	/* Parse the DN (Distinguished Name) */
862	if(*p) {
863	char *dn = p;
864	char *unescaped;
865	CURLcode result;
866
867	LDAP_TRACE(("DN '%s'\n", dn));
868
869	/* Unescape the DN */
870	result = Curl_urldecode(dn, 0, &unescaped, NULL, REJECT_ZERO);
871	if(result) {
872	rc = LDAP_NO_MEMORY;
873
874	goto quit;
875	}
876
877	#if defined(USE_WIN32_LDAP)
878	/* Convert the unescaped string to a tchar */
879	ludp->lud_dn = curlx_convert_UTF8_to_tchar(unescaped);
880
881	/* Free the unescaped string as we are done with it */
882	free(unescaped);
883
884	if(!ludp->lud_dn) {
885	rc = LDAP_NO_MEMORY;
886
887	goto quit;
888	}
889	#else
890	ludp->lud_dn = unescaped;
891	#endif
892	}
893
894	p = q;
895	if(!p)
896	goto quit;
897
898	/* Parse the attributes. skip "??" */
899	q = strchr(p, '?');
900	if(q)
901	*q++ = '\0';
902
903	if(*p) {
904	char **attributes;
905	size_t count = 0;
906
907	/* Split the string into an array of attributes */
908	if(!split_str(p, &attributes, &count)) {
909	rc = LDAP_NO_MEMORY;
910
911	goto quit;
912	}
913
914	/* Allocate our array (+1 for the NULL entry) */
915	#if defined(USE_WIN32_LDAP)
916	ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *));
917	#else
918	ludp->lud_attrs = calloc(count + 1, sizeof(char *));
919	#endif
920	if(!ludp->lud_attrs) {
921	free(attributes);
922
923	rc = LDAP_NO_MEMORY;
924
925	goto quit;
926	}
927
928	for(i = 0; i < count; i++) {
929	char *unescaped;
930	CURLcode result;
931
932	LDAP_TRACE(("attr[%zu] '%s'\n", i, attributes[i]));
933
934	/* Unescape the attribute */
935	result = Curl_urldecode(attributes[i], 0, &unescaped, NULL,
936	REJECT_ZERO);
937	if(result) {
938	free(attributes);
939
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_attrs[i] = curlx_convert_UTF8_to_tchar(unescaped);
948
949	/* Free the unescaped string as we are done with it */
950	free(unescaped);
951
952	if(!ludp->lud_attrs[i]) {
953	free(attributes);
954
955	rc = LDAP_NO_MEMORY;
956
957	goto quit;
958	}
959	#else
960	ludp->lud_attrs[i] = unescaped;
961	#endif
962
963	ludp->lud_attrs_dups++;
964	}
965
966	free(attributes);
967	}
968
969	p = q;
970	if(!p)
971	goto quit;
972
973	/* Parse the scope. skip "??" */
974	q = strchr(p, '?');
975	if(q)
976	*q++ = '\0';
977
978	if(*p) {
979	ludp->lud_scope = str2scope(p);
980	if(ludp->lud_scope == -1) {
981	rc = LDAP_INVALID_SYNTAX;
982
983	goto quit;
984	}
985	LDAP_TRACE(("scope %d\n", ludp->lud_scope));
986	}
987
988	p = q;
989	if(!p)
990	goto quit;
991
992	/* Parse the filter */
993	q = strchr(p, '?');
994	if(q)
995	*q++ = '\0';
996
997	if(*p) {
998	char *filter = p;
999	char *unescaped;
1000	CURLcode result;
1001
1002	LDAP_TRACE(("filter '%s'\n", filter));
1003
1004	/* Unescape the filter */
1005	result = Curl_urldecode(filter, 0, &unescaped, NULL, REJECT_ZERO);
1006	if(result) {
1007	rc = LDAP_NO_MEMORY;
1008
1009	goto quit;
1010	}
1011
1012	#if defined(USE_WIN32_LDAP)
1013	/* Convert the unescaped string to a tchar */
1014	ludp->lud_filter = curlx_convert_UTF8_to_tchar(unescaped);
1015
1016	/* Free the unescaped string as we are done with it */
1017	free(unescaped);
1018
1019	if(!ludp->lud_filter) {
1020	rc = LDAP_NO_MEMORY;
1021
1022	goto quit;
1023	}
1024	#else
1025	ludp->lud_filter = unescaped;
1026	#endif
1027	}
1028
1029	p = q;
1030	if(p && !*p) {
1031	rc = LDAP_INVALID_SYNTAX;
1032
1033	goto quit;
1034	}
1035
1036	quit:
1037	free(path);
1038	free(query);
1039
1040	return rc;
1041	}
1042
1043	static int _ldap_url_parse(struct Curl_easy *data,
1044	const struct connectdata *conn,
1045	LDAPURLDesc **ludpp)
1046	{
1047	LDAPURLDesc ludp = calloc(1, sizeof(ludp));
1048	int rc;
1049
1050	*ludpp = NULL;
1051	if(!ludp)
1052	return LDAP_NO_MEMORY;
1053
1054	rc = _ldap_url_parse2(data, conn, ludp);
1055	if(rc != LDAP_SUCCESS) {
1056	_ldap_free_urldesc(ludp);
1057	ludp = NULL;
1058	}
1059	*ludpp = ludp;
1060	return (rc);
1061	}
1062
1063	static void _ldap_free_urldesc(LDAPURLDesc *ludp)
1064	{
1065	if(!ludp)
1066	return;
1067
1068	#if defined(USE_WIN32_LDAP)
1069	curlx_unicodefree(ludp->lud_dn);
1070	curlx_unicodefree(ludp->lud_filter);
1071	#else
1072	free(ludp->lud_dn);
1073	free(ludp->lud_filter);
1074	#endif
1075
1076	if(ludp->lud_attrs) {
1077	size_t i;
1078	for(i = 0; i < ludp->lud_attrs_dups; i++) {
1079	#if defined(USE_WIN32_LDAP)
1080	curlx_unicodefree(ludp->lud_attrs[i]);
1081	#else
1082	free(ludp->lud_attrs[i]);
1083	#endif
1084	}
1085	free(ludp->lud_attrs);
1086	}
1087
1088	free(ludp);
1089	}
1090	#endif /* !HAVE_LDAP_URL_PARSE */
1091	#endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */

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