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(0)
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)
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:
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:
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
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: */
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: */
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: */
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:
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:
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 */
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