ldap.c@ 104083

Last change on this file since 104083 was 104083, checked in by vboxsync, 10 months ago
curl-8.7.1: Applied and adjusted our curl changes to 8.4.0. bugref:10639
Property svn:eol-style set to `native`
File size: 28.9 KB

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

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source: vbox/trunk/src/libs/curl-8.7.1/lib/ldap.c@ 104083

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