1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #if !defined(CURL_DISABLE_LDAP) && !defined(USE_OPENLDAP)
26
27 /*
28 * Notice that USE_OPENLDAP is only a source code selection switch. When
29 * libcurl is built with USE_OPENLDAP defined the libcurl source code that
30 * gets compiled is the code from openldap.c, otherwise the code that gets
31 * compiled is the code from ldap.c.
32 *
33 * When USE_OPENLDAP is defined a recent version of the OpenLDAP library
34 * might be required for compilation and runtime. In order to use ancient
35 * OpenLDAP library versions, USE_OPENLDAP shall not be defined.
36 */
37
38 #ifdef USE_WIN32_LDAP /* Use Windows LDAP implementation. */
39 # include <winldap.h>
40 # ifndef LDAP_VENDOR_NAME
41 # error Your Platform SDK is NOT sufficient for LDAP support! \
42 Update your Platform SDK, or disable LDAP support!
43 # else
44 # include <winber.h>
45 # endif
46 #else
47 # define LDAP_DEPRECATED 1 /* Be sure ldap_init() is defined. */
48 # ifdef HAVE_LBER_H
49 # include <lber.h>
50 # endif
51 # include <ldap.h>
52 # if (defined(HAVE_LDAP_SSL) && defined(HAVE_LDAP_SSL_H))
53 # include <ldap_ssl.h>
54 # endif /* HAVE_LDAP_SSL && HAVE_LDAP_SSL_H */
55 #endif
56
57 #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 typedef struct {
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 } CURL_LDAPURLDesc;
99
100 #undef LDAPURLDesc
101 #define LDAPURLDesc CURL_LDAPURLDesc
102
103 static int _ldap_url_parse(const struct connectdata *conn,
104 LDAPURLDesc **ludp);
105 static void _ldap_free_urldesc(LDAPURLDesc *ludp);
106
107 #undef ldap_free_urldesc
108 #define ldap_free_urldesc _ldap_free_urldesc
109 #endif
110
111 #ifdef DEBUG_LDAP
112 #define LDAP_TRACE(x) do { \
113 _ldap_trace("%u: ", __LINE__); \
114 _ldap_trace x; \
115 } WHILE_FALSE
116
117 static void _ldap_trace(const char *fmt, ...);
118 #else
119 #define LDAP_TRACE(x) Curl_nop_stmt
120 #endif
121
122 #if defined(USE_WIN32_LDAP) && defined(ldap_err2string)
123 /* Use ansi error strings in UNICODE builds */
124 #undef ldap_err2string
125 #define ldap_err2string ldap_err2stringA
126 #endif
127
128
129 static CURLcode Curl_ldap(struct connectdata *conn, bool *done);
130
131 /*
132 * LDAP protocol handler.
133 */
134
135 const struct Curl_handler Curl_handler_ldap = {
136 "LDAP", /* scheme */
137 ZERO_NULL, /* setup_connection */
138 Curl_ldap, /* do_it */
139 ZERO_NULL, /* done */
140 ZERO_NULL, /* do_more */
141 ZERO_NULL, /* connect_it */
142 ZERO_NULL, /* connecting */
143 ZERO_NULL, /* doing */
144 ZERO_NULL, /* proto_getsock */
145 ZERO_NULL, /* doing_getsock */
146 ZERO_NULL, /* domore_getsock */
147 ZERO_NULL, /* perform_getsock */
148 ZERO_NULL, /* disconnect */
149 ZERO_NULL, /* readwrite */
150 ZERO_NULL, /* connection_check */
151 PORT_LDAP, /* defport */
152 CURLPROTO_LDAP, /* protocol */
153 PROTOPT_NONE /* flags */
154 };
155
156 #ifdef HAVE_LDAP_SSL
157 /*
158 * LDAPS protocol handler.
159 */
160
161 const struct Curl_handler Curl_handler_ldaps = {
162 "LDAPS", /* scheme */
163 ZERO_NULL, /* setup_connection */
164 Curl_ldap, /* do_it */
165 ZERO_NULL, /* done */
166 ZERO_NULL, /* do_more */
167 ZERO_NULL, /* connect_it */
168 ZERO_NULL, /* connecting */
169 ZERO_NULL, /* doing */
170 ZERO_NULL, /* proto_getsock */
171 ZERO_NULL, /* doing_getsock */
172 ZERO_NULL, /* domore_getsock */
173 ZERO_NULL, /* perform_getsock */
174 ZERO_NULL, /* disconnect */
175 ZERO_NULL, /* readwrite */
176 ZERO_NULL, /* connection_check */
177 PORT_LDAPS, /* defport */
178 CURLPROTO_LDAPS, /* protocol */
179 PROTOPT_SSL /* flags */
180 };
181 #endif
182
183 #if defined(USE_WIN32_LDAP)
184
185 #if defined(USE_WINDOWS_SSPI)
ldap_win_bind_auth(LDAP * server,const char * user,const char * passwd,unsigned long authflags)186 static int ldap_win_bind_auth(LDAP *server, const char *user,
187 const char *passwd, unsigned long authflags)
188 {
189 ULONG method = 0;
190 SEC_WINNT_AUTH_IDENTITY cred;
191 int rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
192
193 memset(&cred, 0, sizeof(cred));
194
195 #if defined(USE_SPNEGO)
196 if(authflags & CURLAUTH_NEGOTIATE) {
197 method = LDAP_AUTH_NEGOTIATE;
198 }
199 else
200 #endif
201 #if defined(USE_NTLM)
202 if(authflags & CURLAUTH_NTLM) {
203 method = LDAP_AUTH_NTLM;
204 }
205 else
206 #endif
207 #if !defined(CURL_DISABLE_CRYPTO_AUTH)
208 if(authflags & CURLAUTH_DIGEST) {
209 method = LDAP_AUTH_DIGEST;
210 }
211 else
212 #endif
213 {
214 /* required anyway if one of upper preprocessor definitions enabled */
215 }
216
217 if(method && user && passwd) {
218 rc = Curl_create_sspi_identity(user, passwd, &cred);
219 if(!rc) {
220 rc = ldap_bind_s(server, NULL, (TCHAR *)&cred, method);
221 Curl_sspi_free_identity(&cred);
222 }
223 }
224 else {
225 /* proceed with current user credentials */
226 method = LDAP_AUTH_NEGOTIATE;
227 rc = ldap_bind_s(server, NULL, NULL, method);
228 }
229 return rc;
230 }
231 #endif /* #if defined(USE_WINDOWS_SSPI) */
232
ldap_win_bind(struct connectdata * conn,LDAP * server,const char * user,const char * passwd)233 static int ldap_win_bind(struct connectdata *conn, LDAP *server,
234 const char *user, const char *passwd)
235 {
236 int rc = LDAP_INVALID_CREDENTIALS;
237
238 PTCHAR inuser = NULL;
239 PTCHAR inpass = NULL;
240
241 if(user && passwd && (conn->data->set.httpauth & CURLAUTH_BASIC)) {
242 inuser = Curl_convert_UTF8_to_tchar((char *) user);
243 inpass = Curl_convert_UTF8_to_tchar((char *) passwd);
244
245 rc = ldap_simple_bind_s(server, inuser, inpass);
246
247 Curl_unicodefree(inuser);
248 Curl_unicodefree(inpass);
249 }
250 #if defined(USE_WINDOWS_SSPI)
251 else {
252 rc = ldap_win_bind_auth(server, user, passwd, conn->data->set.httpauth);
253 }
254 #endif
255
256 return rc;
257 }
258 #endif /* #if defined(USE_WIN32_LDAP) */
259
Curl_ldap(struct connectdata * conn,bool * done)260 static CURLcode Curl_ldap(struct connectdata *conn, bool *done)
261 {
262 CURLcode result = CURLE_OK;
263 int rc = 0;
264 LDAP *server = NULL;
265 LDAPURLDesc *ludp = NULL;
266 LDAPMessage *ldapmsg = NULL;
267 LDAPMessage *entryIterator;
268 int num = 0;
269 struct Curl_easy *data = conn->data;
270 int ldap_proto = LDAP_VERSION3;
271 int ldap_ssl = 0;
272 char *val_b64 = NULL;
273 size_t val_b64_sz = 0;
274 curl_off_t dlsize = 0;
275 #ifdef LDAP_OPT_NETWORK_TIMEOUT
276 struct timeval ldap_timeout = {10, 0}; /* 10 sec connection/search timeout */
277 #endif
278 #if defined(USE_WIN32_LDAP)
279 TCHAR *host = NULL;
280 #else
281 char *host = NULL;
282 #endif
283 char *user = NULL;
284 char *passwd = NULL;
285
286 *done = TRUE; /* unconditionally */
287 infof(data, "LDAP local: LDAP Vendor = %s ; LDAP Version = %d\n",
288 LDAP_VENDOR_NAME, LDAP_VENDOR_VERSION);
289 infof(data, "LDAP local: %s\n", data->change.url);
290
291 #ifdef HAVE_LDAP_URL_PARSE
292 rc = ldap_url_parse(data->change.url, &ludp);
293 #else
294 rc = _ldap_url_parse(conn, &ludp);
295 #endif
296 if(rc != 0) {
297 failf(data, "LDAP local: %s", ldap_err2string(rc));
298 result = CURLE_LDAP_INVALID_URL;
299 goto quit;
300 }
301
302 /* Get the URL scheme (either ldap or ldaps) */
303 if(conn->given->flags & PROTOPT_SSL)
304 ldap_ssl = 1;
305 infof(data, "LDAP local: trying to establish %s connection\n",
306 ldap_ssl ? "encrypted" : "cleartext");
307
308 #if defined(USE_WIN32_LDAP)
309 host = Curl_convert_UTF8_to_tchar(conn->host.name);
310 if(!host) {
311 result = CURLE_OUT_OF_MEMORY;
312
313 goto quit;
314 }
315 #else
316 host = conn->host.name;
317 #endif
318
319 if(conn->bits.user_passwd) {
320 user = conn->user;
321 passwd = conn->passwd;
322 }
323
324 #ifdef LDAP_OPT_NETWORK_TIMEOUT
325 ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &ldap_timeout);
326 #endif
327 ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
328
329 if(ldap_ssl) {
330 #ifdef HAVE_LDAP_SSL
331 #ifdef USE_WIN32_LDAP
332 /* Win32 LDAP SDK doesn't support insecure mode without CA! */
333 server = ldap_sslinit(host, (int)conn->port, 1);
334 ldap_set_option(server, LDAP_OPT_SSL, LDAP_OPT_ON);
335 #else
336 int ldap_option;
337 char *ldap_ca = conn->ssl_config.CAfile;
338 #if defined(CURL_HAS_NOVELL_LDAPSDK)
339 rc = ldapssl_client_init(NULL, NULL);
340 if(rc != LDAP_SUCCESS) {
341 failf(data, "LDAP local: ldapssl_client_init %s", ldap_err2string(rc));
342 result = CURLE_SSL_CERTPROBLEM;
343 goto quit;
344 }
345 if(conn->ssl_config.verifypeer) {
346 /* Novell SDK supports DER or BASE64 files. */
347 int cert_type = LDAPSSL_CERT_FILETYPE_B64;
348 if((data->set.ssl.cert_type) &&
349 (strcasecompare(data->set.ssl.cert_type, "DER")))
350 cert_type = LDAPSSL_CERT_FILETYPE_DER;
351 if(!ldap_ca) {
352 failf(data, "LDAP local: ERROR %s CA cert not set!",
353 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"));
354 result = CURLE_SSL_CERTPROBLEM;
355 goto quit;
356 }
357 infof(data, "LDAP local: using %s CA cert '%s'\n",
358 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
359 ldap_ca);
360 rc = ldapssl_add_trusted_cert(ldap_ca, cert_type);
361 if(rc != LDAP_SUCCESS) {
362 failf(data, "LDAP local: ERROR setting %s CA cert: %s",
363 (cert_type == LDAPSSL_CERT_FILETYPE_DER ? "DER" : "PEM"),
364 ldap_err2string(rc));
365 result = CURLE_SSL_CERTPROBLEM;
366 goto quit;
367 }
368 ldap_option = LDAPSSL_VERIFY_SERVER;
369 }
370 else
371 ldap_option = LDAPSSL_VERIFY_NONE;
372 rc = ldapssl_set_verify_mode(ldap_option);
373 if(rc != LDAP_SUCCESS) {
374 failf(data, "LDAP local: ERROR setting cert verify mode: %s",
375 ldap_err2string(rc));
376 result = CURLE_SSL_CERTPROBLEM;
377 goto quit;
378 }
379 server = ldapssl_init(host, (int)conn->port, 1);
380 if(server == NULL) {
381 failf(data, "LDAP local: Cannot connect to %s:%ld",
382 conn->host.dispname, conn->port);
383 result = CURLE_COULDNT_CONNECT;
384 goto quit;
385 }
386 #elif defined(LDAP_OPT_X_TLS)
387 if(conn->ssl_config.verifypeer) {
388 /* OpenLDAP SDK supports BASE64 files. */
389 if((data->set.ssl.cert_type) &&
390 (!strcasecompare(data->set.ssl.cert_type, "PEM"))) {
391 failf(data, "LDAP local: ERROR OpenLDAP only supports PEM cert-type!");
392 result = CURLE_SSL_CERTPROBLEM;
393 goto quit;
394 }
395 if(!ldap_ca) {
396 failf(data, "LDAP local: ERROR PEM CA cert not set!");
397 result = CURLE_SSL_CERTPROBLEM;
398 goto quit;
399 }
400 infof(data, "LDAP local: using PEM CA cert: %s\n", ldap_ca);
401 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_ca);
402 if(rc != LDAP_SUCCESS) {
403 failf(data, "LDAP local: ERROR setting PEM CA cert: %s",
404 ldap_err2string(rc));
405 result = CURLE_SSL_CERTPROBLEM;
406 goto quit;
407 }
408 ldap_option = LDAP_OPT_X_TLS_DEMAND;
409 }
410 else
411 ldap_option = LDAP_OPT_X_TLS_NEVER;
412
413 rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &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 = ldap_init(host, (int)conn->port);
421 if(server == NULL) {
422 failf(data, "LDAP local: Cannot connect to %s:%ld",
423 conn->host.dispname, conn->port);
424 result = CURLE_COULDNT_CONNECT;
425 goto quit;
426 }
427 ldap_option = LDAP_OPT_X_TLS_HARD;
428 rc = ldap_set_option(server, LDAP_OPT_X_TLS, &ldap_option);
429 if(rc != LDAP_SUCCESS) {
430 failf(data, "LDAP local: ERROR setting SSL/TLS mode: %s",
431 ldap_err2string(rc));
432 result = CURLE_SSL_CERTPROBLEM;
433 goto quit;
434 }
435 /*
436 rc = ldap_start_tls_s(server, NULL, NULL);
437 if(rc != LDAP_SUCCESS) {
438 failf(data, "LDAP local: ERROR starting SSL/TLS mode: %s",
439 ldap_err2string(rc));
440 result = CURLE_SSL_CERTPROBLEM;
441 goto quit;
442 }
443 */
444 #else
445 /* we should probably never come up to here since configure
446 should check in first place if we can support LDAP SSL/TLS */
447 failf(data, "LDAP local: SSL/TLS not supported with this version "
448 "of the OpenLDAP toolkit\n");
449 result = CURLE_SSL_CERTPROBLEM;
450 goto quit;
451 #endif
452 #endif
453 #endif /* CURL_LDAP_USE_SSL */
454 }
455 else {
456 server = ldap_init(host, (int)conn->port);
457 if(server == NULL) {
458 failf(data, "LDAP local: Cannot connect to %s:%ld",
459 conn->host.dispname, conn->port);
460 result = CURLE_COULDNT_CONNECT;
461 goto quit;
462 }
463 }
464 #ifdef USE_WIN32_LDAP
465 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
466 #endif
467
468 #ifdef USE_WIN32_LDAP
469 rc = ldap_win_bind(conn, server, user, passwd);
470 #else
471 rc = ldap_simple_bind_s(server, user, passwd);
472 #endif
473 if(!ldap_ssl && rc != 0) {
474 ldap_proto = LDAP_VERSION2;
475 ldap_set_option(server, LDAP_OPT_PROTOCOL_VERSION, &ldap_proto);
476 #ifdef USE_WIN32_LDAP
477 rc = ldap_win_bind(conn, server, user, passwd);
478 #else
479 rc = ldap_simple_bind_s(server, user, passwd);
480 #endif
481 }
482 if(rc != 0) {
483 #ifdef USE_WIN32_LDAP
484 failf(data, "LDAP local: bind via ldap_win_bind %s",
485 ldap_err2string(rc));
486 #else
487 failf(data, "LDAP local: bind via ldap_simple_bind_s %s",
488 ldap_err2string(rc));
489 #endif
490 result = CURLE_LDAP_CANNOT_BIND;
491 goto quit;
492 }
493
494 rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
495 ludp->lud_filter, ludp->lud_attrs, 0, &ldapmsg);
496
497 if(rc != 0 && rc != LDAP_SIZELIMIT_EXCEEDED) {
498 failf(data, "LDAP remote: %s", ldap_err2string(rc));
499 result = CURLE_LDAP_SEARCH_FAILED;
500 goto quit;
501 }
502
503 for(num = 0, entryIterator = ldap_first_entry(server, ldapmsg);
504 entryIterator;
505 entryIterator = ldap_next_entry(server, entryIterator), num++) {
506 BerElement *ber = NULL;
507 #if defined(USE_WIN32_LDAP)
508 TCHAR *attribute;
509 #else
510 char *attribute; /*! suspicious that this isn't 'const' */
511 #endif
512 int i;
513
514 /* Get the DN and write it to the client */
515 {
516 char *name;
517 size_t name_len;
518 #if defined(USE_WIN32_LDAP)
519 TCHAR *dn = ldap_get_dn(server, entryIterator);
520 name = Curl_convert_tchar_to_UTF8(dn);
521 if(!name) {
522 ldap_memfree(dn);
523
524 result = CURLE_OUT_OF_MEMORY;
525
526 goto quit;
527 }
528 #else
529 char *dn = name = ldap_get_dn(server, entryIterator);
530 #endif
531 name_len = strlen(name);
532
533 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"DN: ", 4);
534 if(result) {
535 #if defined(USE_WIN32_LDAP)
536 Curl_unicodefree(name);
537 #endif
538 ldap_memfree(dn);
539
540 goto quit;
541 }
542
543 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *) name,
544 name_len);
545 if(result) {
546 #if defined(USE_WIN32_LDAP)
547 Curl_unicodefree(name);
548 #endif
549 ldap_memfree(dn);
550
551 goto quit;
552 }
553
554 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
555 if(result) {
556 #if defined(USE_WIN32_LDAP)
557 Curl_unicodefree(name);
558 #endif
559 ldap_memfree(dn);
560
561 goto quit;
562 }
563
564 dlsize += name_len + 5;
565
566 #if defined(USE_WIN32_LDAP)
567 Curl_unicodefree(name);
568 #endif
569 ldap_memfree(dn);
570 }
571
572 /* Get the attributes and write them to the client */
573 for(attribute = ldap_first_attribute(server, entryIterator, &ber);
574 attribute;
575 attribute = ldap_next_attribute(server, entryIterator, ber)) {
576 BerValue **vals;
577 size_t attr_len;
578 #if defined(USE_WIN32_LDAP)
579 char *attr = Curl_convert_tchar_to_UTF8(attribute);
580 if(!attr) {
581 if(ber)
582 ber_free(ber, 0);
583
584 result = CURLE_OUT_OF_MEMORY;
585
586 goto quit;
587 }
588 #else
589 char *attr = attribute;
590 #endif
591 attr_len = strlen(attr);
592
593 vals = ldap_get_values_len(server, entryIterator, attribute);
594 if(vals != NULL) {
595 for(i = 0; (vals[i] != NULL); i++) {
596 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\t", 1);
597 if(result) {
598 ldap_value_free_len(vals);
599 #if defined(USE_WIN32_LDAP)
600 Curl_unicodefree(attr);
601 #endif
602 ldap_memfree(attribute);
603 if(ber)
604 ber_free(ber, 0);
605
606 goto quit;
607 }
608
609 result = Curl_client_write(conn, CLIENTWRITE_BODY,
610 (char *) attr, attr_len);
611 if(result) {
612 ldap_value_free_len(vals);
613 #if defined(USE_WIN32_LDAP)
614 Curl_unicodefree(attr);
615 #endif
616 ldap_memfree(attribute);
617 if(ber)
618 ber_free(ber, 0);
619
620 goto quit;
621 }
622
623 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)": ", 2);
624 if(result) {
625 ldap_value_free_len(vals);
626 #if defined(USE_WIN32_LDAP)
627 Curl_unicodefree(attr);
628 #endif
629 ldap_memfree(attribute);
630 if(ber)
631 ber_free(ber, 0);
632
633 goto quit;
634 }
635
636 dlsize += attr_len + 3;
637
638 if((attr_len > 7) &&
639 (strcmp(";binary", (char *) attr + (attr_len - 7)) == 0)) {
640 /* Binary attribute, encode to base64. */
641 result = Curl_base64_encode(data,
642 vals[i]->bv_val,
643 vals[i]->bv_len,
644 &val_b64,
645 &val_b64_sz);
646 if(result) {
647 ldap_value_free_len(vals);
648 #if defined(USE_WIN32_LDAP)
649 Curl_unicodefree(attr);
650 #endif
651 ldap_memfree(attribute);
652 if(ber)
653 ber_free(ber, 0);
654
655 goto quit;
656 }
657
658 if(val_b64_sz > 0) {
659 result = Curl_client_write(conn, CLIENTWRITE_BODY, val_b64,
660 val_b64_sz);
661 free(val_b64);
662 if(result) {
663 ldap_value_free_len(vals);
664 #if defined(USE_WIN32_LDAP)
665 Curl_unicodefree(attr);
666 #endif
667 ldap_memfree(attribute);
668 if(ber)
669 ber_free(ber, 0);
670
671 goto quit;
672 }
673
674 dlsize += val_b64_sz;
675 }
676 }
677 else {
678 result = Curl_client_write(conn, CLIENTWRITE_BODY, vals[i]->bv_val,
679 vals[i]->bv_len);
680 if(result) {
681 ldap_value_free_len(vals);
682 #if defined(USE_WIN32_LDAP)
683 Curl_unicodefree(attr);
684 #endif
685 ldap_memfree(attribute);
686 if(ber)
687 ber_free(ber, 0);
688
689 goto quit;
690 }
691
692 dlsize += vals[i]->bv_len;
693 }
694
695 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
696 if(result) {
697 ldap_value_free_len(vals);
698 #if defined(USE_WIN32_LDAP)
699 Curl_unicodefree(attr);
700 #endif
701 ldap_memfree(attribute);
702 if(ber)
703 ber_free(ber, 0);
704
705 goto quit;
706 }
707
708 dlsize++;
709 }
710
711 /* Free memory used to store values */
712 ldap_value_free_len(vals);
713 }
714
715 /* Free the attribute as we are done with it */
716 #if defined(USE_WIN32_LDAP)
717 Curl_unicodefree(attr);
718 #endif
719 ldap_memfree(attribute);
720
721 result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
722 if(result)
723 goto quit;
724 dlsize++;
725 Curl_pgrsSetDownloadCounter(data, dlsize);
726 }
727
728 if(ber)
729 ber_free(ber, 0);
730 }
731
732 quit:
733 if(ldapmsg) {
734 ldap_msgfree(ldapmsg);
735 LDAP_TRACE(("Received %d entries\n", num));
736 }
737 if(rc == LDAP_SIZELIMIT_EXCEEDED)
738 infof(data, "There are more than %d entries\n", num);
739 if(ludp)
740 ldap_free_urldesc(ludp);
741 if(server)
742 ldap_unbind_s(server);
743 #if defined(HAVE_LDAP_SSL) && defined(CURL_HAS_NOVELL_LDAPSDK)
744 if(ldap_ssl)
745 ldapssl_client_deinit();
746 #endif /* HAVE_LDAP_SSL && CURL_HAS_NOVELL_LDAPSDK */
747
748 #if defined(USE_WIN32_LDAP)
749 Curl_unicodefree(host);
750 #endif
751
752 /* no data to transfer */
753 Curl_setup_transfer(data, -1, -1, FALSE, -1);
754 connclose(conn, "LDAP connection always disable re-use");
755
756 return result;
757 }
758
759 #ifdef DEBUG_LDAP
_ldap_trace(const char * fmt,...)760 static void _ldap_trace(const char *fmt, ...)
761 {
762 static int do_trace = -1;
763 va_list args;
764
765 if(do_trace == -1) {
766 const char *env = getenv("CURL_TRACE");
767 do_trace = (env && strtol(env, NULL, 10) > 0);
768 }
769 if(!do_trace)
770 return;
771
772 va_start(args, fmt);
773 vfprintf(stderr, fmt, args);
774 va_end(args);
775 }
776 #endif
777
778 #ifndef HAVE_LDAP_URL_PARSE
779
780 /*
781 * Return scope-value for a scope-string.
782 */
str2scope(const char * p)783 static int str2scope(const char *p)
784 {
785 if(strcasecompare(p, "one"))
786 return LDAP_SCOPE_ONELEVEL;
787 if(strcasecompare(p, "onetree"))
788 return LDAP_SCOPE_ONELEVEL;
789 if(strcasecompare(p, "base"))
790 return LDAP_SCOPE_BASE;
791 if(strcasecompare(p, "sub"))
792 return LDAP_SCOPE_SUBTREE;
793 if(strcasecompare(p, "subtree"))
794 return LDAP_SCOPE_SUBTREE;
795 return (-1);
796 }
797
798 /*
799 * Split 'str' into strings separated by commas.
800 * Note: out[] points into 'str'.
801 */
split_str(char * str,char *** out,size_t * count)802 static bool split_str(char *str, char ***out, size_t *count)
803 {
804 char **res;
805 char *lasts;
806 char *s;
807 size_t i;
808 size_t items = 1;
809
810 s = strchr(str, ',');
811 while(s) {
812 items++;
813 s = strchr(++s, ',');
814 }
815
816 res = calloc(items, sizeof(char *));
817 if(!res)
818 return FALSE;
819
820 for(i = 0, s = strtok_r(str, ",", &lasts); s && i < items;
821 s = strtok_r(NULL, ",", &lasts), i++)
822 res[i] = s;
823
824 *out = res;
825 *count = items;
826
827 return TRUE;
828 }
829
830 /*
831 * Break apart the pieces of an LDAP URL.
832 * Syntax:
833 * ldap://<hostname>:<port>/<base_dn>?<attributes>?<scope>?<filter>?<ext>
834 *
835 * <hostname> already known from 'conn->host.name'.
836 * <port> already known from 'conn->remote_port'.
837 * extract the rest from 'conn->data->state.path+1'. All fields are optional.
838 * e.g.
839 * ldap://<hostname>:<port>/?<attributes>?<scope>?<filter>
840 * yields ludp->lud_dn = "".
841 *
842 * Defined in RFC4516 section 2.
843 */
_ldap_url_parse2(const struct connectdata * conn,LDAPURLDesc * ludp)844 static int _ldap_url_parse2(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(!conn->data ||
854 !conn->data->state.up.path ||
855 conn->data->state.up.path[0] != '/' ||
856 !strncasecompare("LDAP", conn->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(conn->data->state.up.path + 1);
865 if(!path)
866 return LDAP_NO_MEMORY;
867
868 /* Duplicate the query if present */
869 if(conn->data->state.up.query) {
870 q = query = strdup(conn->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(conn->data, dn, 0, &unescaped, NULL, FALSE);
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 = Curl_convert_UTF8_to_tchar(unescaped);
896
897 /* Free the unescaped string as we are done with it */
898 Curl_unicodefree(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[%d] '%s'\n", i, attributes[i]));
949
950 /* Unescape the attribute */
951 result = Curl_urldecode(conn->data, attributes[i], 0, &unescaped, NULL,
952 FALSE);
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] = Curl_convert_UTF8_to_tchar(unescaped);
964
965 /* Free the unescaped string as we are done with it */
966 Curl_unicodefree(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(conn->data, filter, 0, &unescaped, NULL, FALSE);
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 = Curl_convert_UTF8_to_tchar(unescaped);
1031
1032 /* Free the unescaped string as we are done with it */
1033 Curl_unicodefree(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
_ldap_url_parse(const struct connectdata * conn,LDAPURLDesc ** ludpp)1059 static int _ldap_url_parse(const struct connectdata *conn,
1060 LDAPURLDesc **ludpp)
1061 {
1062 LDAPURLDesc *ludp = calloc(1, sizeof(*ludp));
1063 int rc;
1064
1065 *ludpp = NULL;
1066 if(!ludp)
1067 return LDAP_NO_MEMORY;
1068
1069 rc = _ldap_url_parse2(conn, ludp);
1070 if(rc != LDAP_SUCCESS) {
1071 _ldap_free_urldesc(ludp);
1072 ludp = NULL;
1073 }
1074 *ludpp = ludp;
1075 return (rc);
1076 }
1077
_ldap_free_urldesc(LDAPURLDesc * ludp)1078 static void _ldap_free_urldesc(LDAPURLDesc *ludp)
1079 {
1080 if(!ludp)
1081 return;
1082
1083 free(ludp->lud_dn);
1084 free(ludp->lud_filter);
1085
1086 if(ludp->lud_attrs) {
1087 size_t i;
1088 for(i = 0; i < ludp->lud_attrs_dups; i++)
1089 free(ludp->lud_attrs[i]);
1090 free(ludp->lud_attrs);
1091 }
1092
1093 free(ludp);
1094 }
1095 #endif /* !HAVE_LDAP_URL_PARSE */
1096 #endif /* !CURL_DISABLE_LDAP && !USE_OPENLDAP */
1097