1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * 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)
ldap_win_bind_auth(LDAP * server,const char * user,const char * passwd,unsigned long authflags)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 rc = Curl_create_sspi_identity(user, passwd, &cred);
256 if(!rc) {
257 rc = ldap_bind_s(server, NULL, (TCHAR *)&cred, method);
258 Curl_sspi_free_identity(&cred);
259 }
260 }
261 else {
262 /* proceed with current user credentials */
263 method = LDAP_AUTH_NEGOTIATE;
264 rc = ldap_bind_s(server, NULL, NULL, method);
265 }
266 return rc;
267 }
268 #endif /* #if defined(USE_WINDOWS_SSPI) */
269
ldap_win_bind(struct Curl_easy * data,LDAP * server,const char * user,const char * passwd)270 static int ldap_win_bind(struct Curl_easy *data, LDAP *server,
271 const char *user, const char *passwd)
272 {
273 int rc = LDAP_INVALID_CREDENTIALS;
274
275 PTCHAR inuser = NULL;
276 PTCHAR inpass = NULL;
277
278 if(user && passwd && (data->set.httpauth & CURLAUTH_BASIC)) {
279 inuser = curlx_convert_UTF8_to_tchar((char *) user);
280 inpass = curlx_convert_UTF8_to_tchar((char *) passwd);
281
282 rc = ldap_simple_bind_s(server, inuser, inpass);
283
284 curlx_unicodefree(inuser);
285 curlx_unicodefree(inpass);
286 }
287 #if defined(USE_WINDOWS_SSPI)
288 else {
289 rc = ldap_win_bind_auth(server, user, passwd, data->set.httpauth);
290 }
291 #endif
292
293 return rc;
294 }
295 #endif /* #if defined(USE_WIN32_LDAP) */
296
297 #if defined(USE_WIN32_LDAP)
298 #define FREE_ON_WINLDAP(x) curlx_unicodefree(x)
299 #else
300 #define FREE_ON_WINLDAP(x)
301 #endif
302
303
ldap_do(struct Curl_easy * data,bool * done)304 static CURLcode ldap_do(struct Curl_easy *data, bool *done)
305 {
306 CURLcode result = CURLE_OK;
307 int rc = 0;
308 LDAP *server = NULL;
309 LDAPURLDesc *ludp = NULL;
310 LDAPMessage *ldapmsg = NULL;
311 LDAPMessage *entryIterator;
312 int num = 0;
313 struct connectdata *conn = data->conn;
314 int ldap_proto = LDAP_VERSION3;
315 int ldap_ssl = 0;
316 char *val_b64 = NULL;
317 size_t val_b64_sz = 0;
318 #ifdef LDAP_OPT_NETWORK_TIMEOUT
319 struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */
320 #endif
321 #if defined(USE_WIN32_LDAP)
322 TCHAR *host = NULL;
323 #else
324 char *host = NULL;
325 #endif
326 char *user = NULL;
327 char *passwd = NULL;
328
329 *done = TRUE; /* unconditionally */
330 infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d",
331 LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
332 infof(data, "LDAP local: %s", data->state.url);
333
334 #ifdef HAVE_LDAP_URL_PARSE
335 rc = ldap_url_parse(data->state.url, &ludp);
336 #else
337 rc = _ldap_url_parse(data, conn, &ludp);
338 #endif
339 if(rc) {
340 failf(data, "Bad LDAP URL: %s", ldap_err2string(rc));
341 result = CURLE_URL_MALFORMAT;
342 goto quit;
343 }
344
345 /* Get the URL scheme (either ldap or ldaps) */
346 if(conn->given->flags & PROTOPT_SSL)
347 ldap_ssl = 1;
348 infof(data, "LDAP local: trying to establish %s connection",
349 ldap_ssl ? "encrypted" : "cleartext");
350
351 #if defined(USE_WIN32_LDAP)
352 host = curlx_convert_UTF8_to_tchar(conn->host.name);
353 if(!host) {
354 result = CURLE_OUT_OF_MEMORY;
355
356 goto quit;
357 }
358 #else
359 host = conn->host.name;
360 #endif
361
362 if(data->state.aptr.user) {
363 user = conn->user;
364 passwd = conn->passwd;
365 }
366
367 #ifdef LDAP_OPT_NETWORK_TIMEOUT
368 ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
369 #endif
370 ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
371
372 if(ldap_ssl) {
373 #ifdef HAVE_LDAP_SSL
374 #ifdef USE_WIN32_LDAP
375 /* Win32 LDAP SDK doesn't support insecure mode without CA! */
376 server = ldap_sslinit(host, conn->primary.remote_port, 1);
377 ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
378 #else
379 int ldap_option;
380 char *ldap_ca = conn->ssl_config.CAfile;
381 #if defined(CURL_HAS_NOVELL_LDAPSDK)
382 rc = ldapssl_client_init(NULL, NULL);
383 if(rc != LDAP_SUCCESS) {
384 failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
385 result = CURLE_SSL_CERTPROBLEM;
386 goto quit;
387 }
388 if(conn->ssl_config.verifypeer) {
389 /* Novell SDK supports DER or BASE64 files. */
390 int cert_type = LDAPSSL_CERT_FILETYPE_B64;
391 if((data->set.ssl.cert_type) &&
392 (strcasecompare(data->set.ssl.cert_type, "DER")))
393 cert_type = LDAPSSL_CERT_FILETYPE_DER;
394 if(!ldap_ca) {
395 failf(data, "LDAP local: ERROR %s CA cert not set",
396 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
397 result = CURLE_SSL_CERTPROBLEM;
398 goto quit;
399 }
400 infof(data, "LDAP local: using %s CA cert '%s'",
401 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
402 ldap_ca);
403 rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
404 if(rc != LDAP_SUCCESS) {
405 failf(data, "LDAP local: ERROR setting %s CA cert: %s",
406 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
407 ldap_err2string(rc));
408 result = CURLE_SSL_CERTPROBLEM;
409 goto quit;
410 }
411 ldap_option = LDAPSSL_VERIFY_SERVER;
412 }
413 else
414 ldap_option = LDAPSSL_VERIFY_NONE;
415 rc = ldapssl_set_verify_mode(ldap_option);
416 if(rc != LDAP_SUCCESS) {
417 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
418 ldap_err2string(rc));
419 result = CURLE_SSL_CERTPROBLEM;
420 goto quit;
421 }
422 server = ldapssl_init(host, conn->primary.remote_port, 1);
423 if(!server) {
424 failf(data, "LDAP local: Cannot connect to %s:%u",
425 conn->host.dispname, conn->primary.remote_port);
426 result = CURLE_COULDNT_CONNECT;
427 goto quit;
428 }
429 #elif defined(LDAP_OPT_X_TLS)
430 if(conn->ssl_config.verifypeer) {
431 /* OpenLDAP SDK supports BASE64 files. */
432 if((data->set.ssl.cert_type) &&
433 (!strcasecompare(data->set.ssl.cert_type, "PEM"))) {
434 failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type");
435 result = CURLE_SSL_CERTPROBLEM;
436 goto quit;
437 }
438 if(!ldap_ca) {
439 failf(data, "LDAP local: ERROR PEM CA cert not set");
440 result = CURLE_SSL_CERTPROBLEM;
441 goto quit;
442 }
443 infof(data, "LDAP local: using PEM CA cert: %s", ldap_ca);
444 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
445 if(rc != LDAP_SUCCESS) {
446 failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
447 ldap_err2string(rc));
448 result = CURLE_SSL_CERTPROBLEM;
449 goto quit;
450 }
451 ldap_option = LDAP_OPT_X_TLS_DEMAND;
452 }
453 else
454 ldap_option = LDAP_OPT_X_TLS_NEVER;
455
456 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_option);
457 if(rc != LDAP_SUCCESS) {
458 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
459 ldap_err2string(rc));
460 result = CURLE_SSL_CERTPROBLEM;
461 goto quit;
462 }
463 server = ldap_init(host, conn->primary.remote_port);
464 if(!server) {
465 failf(data, "LDAP local: Cannot connect to %s:%u",
466 conn->host.dispname, conn->primary.remote_port);
467 result = CURLE_COULDNT_CONNECT;
468 goto quit;
469 }
470 ldap_option = LDAP_OPT_X_TLS_HARD;
471 rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
472 if(rc != LDAP_SUCCESS) {
473 failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
474 ldap_err2string(rc));
475 result = CURLE_SSL_CERTPROBLEM;
476 goto quit;
477 }
478 /*
479 rc = ldap_start_tls_s(server, NULL, NULL);
480 if(rc != LDAP_SUCCESS) {
481 failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
482 ldap_err2string(rc));
483 result = CURLE_SSL_CERTPROBLEM;
484 goto quit;
485 }
486 */
487 #else
488 (void)ldap_option;
489 (void)ldap_ca;
490 /* we should probably never come up to here since configure
491 should check in first place if we can support LDAP SSL/TLS */
492 failf(data, "LDAP local: SSL/TLS not supported with this version "
493 "of the OpenLDAP toolkit\n");
494 result = CURLE_SSL_CERTPROBLEM;
495 goto quit;
496 #endif
497 #endif
498 #endif /* CURL_LDAP_USE_SSL */
499 }
500 else if(data->set.use_ssl > CURLUSESSL_TRY) {
501 failf(data, "LDAP local: explicit TLS not supported");
502 result = CURLE_NOT_BUILT_IN;
503 goto quit;
504 }
505 else {
506 server = ldap_init(host, conn->primary.remote_port);
507 if(!server) {
508 failf(data, "LDAP local: Cannot connect to %s:%u",
509 conn->host.dispname, conn->primary.remote_port);
510 result = CURLE_COULDNT_CONNECT;
511 goto quit;
512 }
513 }
514 #ifdef USE_WIN32_LDAP
515 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
516 rc = ldap_win_bind(data, server, user, passwd);
517 #else
518 rc = ldap_simple_bind_s(server, user, passwd);
519 #endif
520 if(!ldap_ssl && rc) {
521 ldap_proto = LDAP_VERSION2;
522 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
523 #ifdef USE_WIN32_LDAP
524 rc = ldap_win_bind(data, server, user, passwd);
525 #else
526 rc = ldap_simple_bind_s(server, user, passwd);
527 #endif
528 }
529 if(rc) {
530 #ifdef USE_WIN32_LDAP
531 failf(data, "LDAP local: bind via ldap_win_bind %s",
532 ldap_err2string(rc));
533 #else
534 failf(data, "LDAP local: bind via ldap_simple_bind_s %s",
535 ldap_err2string(rc));
536 #endif
537 result = CURLE_LDAP_CANNOT_BIND;
538 goto quit;
539 }
540
541 Curl_pgrsSetDownloadCounter(data, 0);
542 rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
543 ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
544
545 if(rc && rc != LDAP_SIZELIMIT_EXCEEDED) {
546 failf(data, "LDAP remote: %s", ldap_err2string(rc));
547 result = CURLE_LDAP_SEARCH_FAILED;
548 goto quit;
549 }
550
551 num = 0;
552 for(entryIterator = ldap_first_entry(server, ldapmsg);
553 entryIterator;
554 entryIterator = ldap_next_entry(server, entryIterator), num++) {
555 BerElement *ber = NULL;
556 #if defined(USE_WIN32_LDAP)
557 TCHAR *attribute;
558 #else
559 char *attribute;
560 #endif
561 int i;
562
563 /* Get the DN and write it to the client */
564 {
565 char *name;
566 size_t name_len;
567 #if defined(USE_WIN32_LDAP)
568 TCHAR *dn = ldap_get_dn(server, entryIterator);
569 name = curlx_convert_tchar_to_UTF8(dn);
570 if(!name) {
571 ldap_memfree(dn);
572
573 result = CURLE_OUT_OF_MEMORY;
574
575 goto quit;
576 }
577 #else
578 char *dn = name = ldap_get_dn(server, entryIterator);
579 #endif
580 name_len = strlen(name);
581
582 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"DN: ", 4);
583 if(result) {
584 FREE_ON_WINLDAP(name);
585 ldap_memfree(dn);
586 goto quit;
587 }
588
589 result = Curl_client_write(data, CLIENTWRITE_BODY, name, name_len);
590 if(result) {
591 FREE_ON_WINLDAP(name);
592 ldap_memfree(dn);
593 goto quit;
594 }
595
596 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
597 if(result) {
598 FREE_ON_WINLDAP(name);
599 ldap_memfree(dn);
600
601 goto quit;
602 }
603
604 FREE_ON_WINLDAP(name);
605 ldap_memfree(dn);
606 }
607
608 /* Get the attributes and write them to the client */
609 for(attribute = ldap_first_attribute(server, entryIterator, &ber);
610 attribute;
611 attribute = ldap_next_attribute(server, entryIterator, ber)) {
612 BerValue **vals;
613 size_t attr_len;
614 #if defined(USE_WIN32_LDAP)
615 char *attr = curlx_convert_tchar_to_UTF8(attribute);
616 if(!attr) {
617 if(ber)
618 ber_free(ber, 0);
619
620 result = CURLE_OUT_OF_MEMORY;
621
622 goto quit;
623 }
624 #else
625 char *attr = attribute;
626 #endif
627 attr_len = strlen(attr);
628
629 vals = ldap_get_values_len(server, entryIterator, attribute);
630 if(vals) {
631 for(i = 0; (vals[i] != NULL); i++) {
632 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\t", 1);
633 if(result) {
634 ldap_value_free_len(vals);
635 FREE_ON_WINLDAP(attr);
636 ldap_memfree(attribute);
637 if(ber)
638 ber_free(ber, 0);
639
640 goto quit;
641 }
642
643 result = Curl_client_write(data, CLIENTWRITE_BODY, attr, attr_len);
644 if(result) {
645 ldap_value_free_len(vals);
646 FREE_ON_WINLDAP(attr);
647 ldap_memfree(attribute);
648 if(ber)
649 ber_free(ber, 0);
650
651 goto quit;
652 }
653
654 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)": ", 2);
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 if((attr_len > 7) &&
666 (strcmp(";binary", attr + (attr_len - 7)) == 0)) {
667 /* Binary attribute, encode to base64. */
668 result = Curl_base64_encode(vals[i]->bv_val, vals[i]->bv_len,
669 &val_b64, &val_b64_sz);
670 if(result) {
671 ldap_value_free_len(vals);
672 FREE_ON_WINLDAP(attr);
673 ldap_memfree(attribute);
674 if(ber)
675 ber_free(ber, 0);
676
677 goto quit;
678 }
679
680 if(val_b64_sz > 0) {
681 result = Curl_client_write(data, CLIENTWRITE_BODY, val_b64,
682 val_b64_sz);
683 free(val_b64);
684 if(result) {
685 ldap_value_free_len(vals);
686 FREE_ON_WINLDAP(attr);
687 ldap_memfree(attribute);
688 if(ber)
689 ber_free(ber, 0);
690
691 goto quit;
692 }
693 }
694 }
695 else {
696 result = Curl_client_write(data, CLIENTWRITE_BODY, vals[i]->bv_val,
697 vals[i]->bv_len);
698 if(result) {
699 ldap_value_free_len(vals);
700 FREE_ON_WINLDAP(attr);
701 ldap_memfree(attribute);
702 if(ber)
703 ber_free(ber, 0);
704
705 goto quit;
706 }
707 }
708
709 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
710 if(result) {
711 ldap_value_free_len(vals);
712 FREE_ON_WINLDAP(attr);
713 ldap_memfree(attribute);
714 if(ber)
715 ber_free(ber, 0);
716
717 goto quit;
718 }
719 }
720
721 /* Free memory used to store values */
722 ldap_value_free_len(vals);
723 }
724
725 /* Free the attribute as we are done with it */
726 FREE_ON_WINLDAP(attr);
727 ldap_memfree(attribute);
728
729 result = Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
730 if(result)
731 goto quit;
732 }
733
734 if(ber)
735 ber_free(ber, 0);
736 }
737
738 quit:
739 if(ldapmsg) {
740 ldap_msgfree(ldapmsg);
741 LDAP_TRACE(("Received %d entries\n", num));
742 }
743 if(rc == LDAP_SIZELIMIT_EXCEEDED)
744 infof(data, "There are more than %d entries", num);
745 if(ludp)
746 ldap_free_urldesc(ludp);
747 if(server)
748 ldap_unbind_s(server);
749 #if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
750 if(ldap_ssl)
751 ldapssl_client_deinit();
752 #endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
753
754 FREE_ON_WINLDAP(host);
755
756 /* no data to transfer */
757 Curl_xfer_setup(data, -1, -1, FALSE, -1);
758 connclose(conn, "LDAP connection always disable reuse");
759
760 return result;
761 }
762
763 #ifdef DEBUG_LDAP
_ldap_trace(const char * fmt,...)764 static void _ldap_trace(const char *fmt, ...)
765 {
766 static int do_trace = -1;
767 va_list args;
768
769 if(do_trace == -1) {
770 const char *env = getenv("CURL_TRACE");
771 do_trace = (env && strtol(env, NULL, 10) > 0);
772 }
773 if(!do_trace)
774 return;
775
776 va_start(args, fmt);
777 vfprintf(stderr, fmt, args);
778 va_end(args);
779 }
780 #endif
781
782 #ifndef HAVE_LDAP_URL_PARSE
783
784 /*
785 * Return scope-value for a scope-string.
786 */
str2scope(const char * p)787 static int str2scope(const char *p)
788 {
789 if(strcasecompare(p, "one"))
790 return LDAP_SCOPE_ONELEVEL;
791 if(strcasecompare(p, "onetree"))
792 return LDAP_SCOPE_ONELEVEL;
793 if(strcasecompare(p, "base"))
794 return LDAP_SCOPE_BASE;
795 if(strcasecompare(p, "sub"))
796 return LDAP_SCOPE_SUBTREE;
797 if(strcasecompare(p, "subtree"))
798 return LDAP_SCOPE_SUBTREE;
799 return (-1);
800 }
801
802 /*
803 * Split 'str' into strings separated by commas.
804 * Note: out[] points into 'str'.
805 */
split_str(char * str,char *** out,size_t * count)806 static bool split_str(char *str, char ***out, size_t *count)
807 {
808 char **res;
809 char *lasts;
810 char *s;
811 size_t i;
812 size_t items = 1;
813
814 s = strchr(str, ',');
815 while(s) {
816 items++;
817 s = strchr(++s, ',');
818 }
819
820 res = calloc(items, sizeof(char *));
821 if(!res)
822 return FALSE;
823
824 for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items;
825 s = strtok_r(NULL, ",", &lasts), i++)
826 res[i] = s;
827
828 *out = res;
829 *count = items;
830
831 return TRUE;
832 }
833
834 /*
835 * Break apart the pieces of an LDAP URL.
836 * Syntax:
837 * ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
838 *
839 * <hostname> already known from 'conn->host.name'.
840 * <port> already known from 'conn->remote_port'.
841 * extract the rest from 'data->state.path+1'. All fields are optional.
842 * e.g.
843 * ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
844 * yields ludp->lud_dn = "".
845 *
846 * Defined in RFC4516 section 2.
847 */
_ldap_url_parse2(struct Curl_easy * data,const struct connectdata * conn,LDAPURLDesc * ludp)848 static int _ldap_url_parse2(struct Curl_easy *data,
849 const struct connectdata *conn, LDAPURLDesc *ludp)
850 {
851 int rc = LDAP_SUCCESS;
852 char *p;
853 char *path;
854 char *q = NULL;
855 char *query = NULL;
856 size_t i;
857
858 if(!data ||
859 !data->state.up.path ||
860 data->state.up.path[0] != '/' ||
861 !strncasecompare("LDAP", data->state.up.scheme, 4))
862 return LDAP_INVALID_SYNTAX;
863
864 ludp->lud_scope = LDAP_SCOPE_BASE;
865 ludp->lud_port = conn->remote_port;
866 ludp->lud_host = conn->host.name;
867
868 /* Duplicate the path */
869 p = path = strdup(data->state.up.path + 1);
870 if(!path)
871 return LDAP_NO_MEMORY;
872
873 /* Duplicate the query if present */
874 if(data->state.up.query) {
875 q = query = strdup(data->state.up.query);
876 if(!query) {
877 free(path);
878 return LDAP_NO_MEMORY;
879 }
880 }
881
882 /* Parse the DN (Distinguished Name) */
883 if(*p) {
884 char *dn = p;
885 char *unescaped;
886 CURLcode result;
887
888 LDAP_TRACE(("DN '%s'\n", dn));
889
890 /* Unescape the DN */
891 result = Curl_urldecode(dn, 0, &unescaped, NULL, REJECT_ZERO);
892 if(result) {
893 rc = LDAP_NO_MEMORY;
894
895 goto quit;
896 }
897
898 #if defined(USE_WIN32_LDAP)
899 /* Convert the unescaped string to a tchar */
900 ludp->lud_dn = curlx_convert_UTF8_to_tchar(unescaped);
901
902 /* Free the unescaped string as we are done with it */
903 free(unescaped);
904
905 if(!ludp->lud_dn) {
906 rc = LDAP_NO_MEMORY;
907
908 goto quit;
909 }
910 #else
911 ludp->lud_dn = unescaped;
912 #endif
913 }
914
915 p = q;
916 if(!p)
917 goto quit;
918
919 /* Parse the attributes. skip "??" */
920 q = strchr(p, '?');
921 if(q)
922 *q++ = '\0';
923
924 if(*p) {
925 char **attributes;
926 size_t count = 0;
927
928 /* Split the string into an array of attributes */
929 if(!split_str(p, &attributes, &count)) {
930 rc = LDAP_NO_MEMORY;
931
932 goto quit;
933 }
934
935 /* Allocate our array (+1 for the NULL entry) */
936 #if defined(USE_WIN32_LDAP)
937 ludp->lud_attrs = calloc(count + 1, sizeof(TCHAR *));
938 #else
939 ludp->lud_attrs = calloc(count + 1, sizeof(char *));
940 #endif
941 if(!ludp->lud_attrs) {
942 free(attributes);
943
944 rc = LDAP_NO_MEMORY;
945
946 goto quit;
947 }
948
949 for(i = 0; i < count; i++) {
950 char *unescaped;
951 CURLcode result;
952
953 LDAP_TRACE(("attr[%zu] '%s'\n", i, attributes[i]));
954
955 /* Unescape the attribute */
956 result = Curl_urldecode(attributes[i], 0, &unescaped, NULL,
957 REJECT_ZERO);
958 if(result) {
959 free(attributes);
960
961 rc = LDAP_NO_MEMORY;
962
963 goto quit;
964 }
965
966 #if defined(USE_WIN32_LDAP)
967 /* Convert the unescaped string to a tchar */
968 ludp->lud_attrs[i] = curlx_convert_UTF8_to_tchar(unescaped);
969
970 /* Free the unescaped string as we are done with it */
971 free(unescaped);
972
973 if(!ludp->lud_attrs[i]) {
974 free(attributes);
975
976 rc = LDAP_NO_MEMORY;
977
978 goto quit;
979 }
980 #else
981 ludp->lud_attrs[i] = unescaped;
982 #endif
983
984 ludp->lud_attrs_dups++;
985 }
986
987 free(attributes);
988 }
989
990 p = q;
991 if(!p)
992 goto quit;
993
994 /* Parse the scope. skip "??" */
995 q = strchr(p, '?');
996 if(q)
997 *q++ = '\0';
998
999 if(*p) {
1000 ludp->lud_scope = str2scope(p);
1001 if(ludp->lud_scope == -1) {
1002 rc = LDAP_INVALID_SYNTAX;
1003
1004 goto quit;
1005 }
1006 LDAP_TRACE(("scope %d\n", ludp->lud_scope));
1007 }
1008
1009 p = q;
1010 if(!p)
1011 goto quit;
1012
1013 /* Parse the filter */
1014 q = strchr(p, '?');
1015 if(q)
1016 *q++ = '\0';
1017
1018 if(*p) {
1019 char *filter = p;
1020 char *unescaped;
1021 CURLcode result;
1022
1023 LDAP_TRACE(("filter '%s'\n", filter));
1024
1025 /* Unescape the filter */
1026 result = Curl_urldecode(filter, 0, &unescaped, NULL, REJECT_ZERO);
1027 if(result) {
1028 rc = LDAP_NO_MEMORY;
1029
1030 goto quit;
1031 }
1032
1033 #if defined(USE_WIN32_LDAP)
1034 /* Convert the unescaped string to a tchar */
1035 ludp->lud_filter = curlx_convert_UTF8_to_tchar(unescaped);
1036
1037 /* Free the unescaped string as we are done with it */
1038 free(unescaped);
1039
1040 if(!ludp->lud_filter) {
1041 rc = LDAP_NO_MEMORY;
1042
1043 goto quit;
1044 }
1045 #else
1046 ludp->lud_filter = unescaped;
1047 #endif
1048 }
1049
1050 p = q;
1051 if(p && !*p) {
1052 rc = LDAP_INVALID_SYNTAX;
1053
1054 goto quit;
1055 }
1056
1057 quit:
1058 free(path);
1059 free(query);
1060
1061 return rc;
1062 }
1063
_ldap_url_parse(struct Curl_easy * data,const struct connectdata * conn,LDAPURLDesc ** ludpp)1064 static int _ldap_url_parse(struct Curl_easy *data,
1065 const struct connectdata *conn,
1066 LDAPURLDesc **ludpp)
1067 {
1068 LDAPURLDesc *ludp = calloc(1, sizeof(*ludp));
1069 int rc;
1070
1071 *ludpp = NULL;
1072 if(!ludp)
1073 return LDAP_NO_MEMORY;
1074
1075 rc = _ldap_url_parse2(data, conn, ludp);
1076 if(rc != LDAP_SUCCESS) {
1077 _ldap_free_urldesc(ludp);
1078 ludp = NULL;
1079 }
1080 *ludpp = ludp;
1081 return (rc);
1082 }
1083
_ldap_free_urldesc(LDAPURLDesc * ludp)1084 static void _ldap_free_urldesc(LDAPURLDesc *ludp)
1085 {
1086 if(!ludp)
1087 return;
1088
1089 #if defined(USE_WIN32_LDAP)
1090 curlx_unicodefree(ludp->lud_dn);
1091 curlx_unicodefree(ludp->lud_filter);
1092 #else
1093 free(ludp->lud_dn);
1094 free(ludp->lud_filter);
1095 #endif
1096
1097 if(ludp->lud_attrs) {
1098 size_t i;
1099 for(i = 0; i < ludp->lud_attrs_dups; i++) {
1100 #if defined(USE_WIN32_LDAP)
1101 curlx_unicodefree(ludp->lud_attrs[i]);
1102 #else
1103 free(ludp->lud_attrs[i]);
1104 #endif
1105 }
1106 free(ludp->lud_attrs);
1107 }
1108
1109 free(ludp);
1110 }
1111 #endif /* !HAVE_LDAP_URL_PARSE */
1112 #endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */
1113
