1 /* $NetBSD: tls2.c,v 1.4 2021/09/06 17:34:33 rillig Exp $ */
2
3 /* tls.c - Handle tls/ssl. */
4 /* $OpenLDAP$ */
5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
6 *
7 * Copyright 1998-2021 The OpenLDAP Foundation.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted only as authorized by the OpenLDAP
12 * Public License.
13 *
14 * A copy of this license is available in the file LICENSE in the
15 * top-level directory of the distribution or, alternatively, at
16 * <http://www.OpenLDAP.org/license.html>.
17 */
18 /* ACKNOWLEDGEMENTS: restructured by Howard Chu.
19 */
20
21 #include <sys/cdefs.h>
22 __RCSID("$NetBSD: tls2.c,v 1.4 2021/09/06 17:34:33 rillig Exp $");
23
24 #include "portable.h"
25 #include "ldap_config.h"
26
27 #include <stdio.h>
28
29 #include <ac/stdlib.h>
30 #include <ac/errno.h>
31 #include <ac/socket.h>
32 #include <ac/string.h>
33 #include <ac/ctype.h>
34 #include <ac/time.h>
35 #include <ac/unistd.h>
36 #include <ac/param.h>
37 #include <ac/dirent.h>
38
39 #include "ldap-int.h"
40
41 #ifdef HAVE_TLS
42
43 #include "ldap-tls.h"
44
45 static tls_impl *tls_imp = &ldap_int_tls_impl;
46 #define HAS_TLS( sb ) ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO, \
47 (void *)tls_imp->ti_sbio )
48
49 #endif /* HAVE_TLS */
50
51 /* RFC2459 minimum required set of supported attribute types
52 * in a certificate DN
53 */
54 typedef struct oid_name {
55 struct berval oid;
56 struct berval name;
57 } oid_name;
58
59 static oid_name oids[] = {
60 { BER_BVC("2.5.4.3"), BER_BVC("cn") },
61 { BER_BVC("2.5.4.4"), BER_BVC("sn") },
62 { BER_BVC("2.5.4.6"), BER_BVC("c") },
63 { BER_BVC("2.5.4.7"), BER_BVC("l") },
64 { BER_BVC("2.5.4.8"), BER_BVC("st") },
65 { BER_BVC("2.5.4.10"), BER_BVC("o") },
66 { BER_BVC("2.5.4.11"), BER_BVC("ou") },
67 { BER_BVC("2.5.4.12"), BER_BVC("title") },
68 { BER_BVC("2.5.4.41"), BER_BVC("name") },
69 { BER_BVC("2.5.4.42"), BER_BVC("givenName") },
70 { BER_BVC("2.5.4.43"), BER_BVC("initials") },
71 { BER_BVC("2.5.4.44"), BER_BVC("generationQualifier") },
72 { BER_BVC("2.5.4.46"), BER_BVC("dnQualifier") },
73 { BER_BVC("1.2.840.113549.1.9.1"), BER_BVC("email") },
74 { BER_BVC("0.9.2342.19200300.100.1.25"), BER_BVC("dc") },
75 { BER_BVNULL, BER_BVNULL }
76 };
77
78 #ifdef HAVE_TLS
79
80 LDAP_F(int) ldap_pvt_tls_check_hostname LDAP_P(( LDAP *ld, void *s, const char *name_in ));
81 LDAP_F(int) ldap_pvt_tls_get_peercert LDAP_P(( void *s, struct berval *der ));
82
83 void
ldap_pvt_tls_ctx_free(void * c)84 ldap_pvt_tls_ctx_free ( void *c )
85 {
86 if ( !c ) return;
87 tls_imp->ti_ctx_free( c );
88 }
89
90 static void
tls_ctx_ref(tls_ctx * ctx)91 tls_ctx_ref( tls_ctx *ctx )
92 {
93 if ( !ctx ) return;
94
95 tls_imp->ti_ctx_ref( ctx );
96 }
97
98 #ifdef LDAP_R_COMPILE
99 /*
100 * an extra mutex for the default ctx.
101 */
102 static ldap_pvt_thread_mutex_t tls_def_ctx_mutex;
103 #endif
104
105 void
ldap_int_tls_destroy(struct ldapoptions * lo)106 ldap_int_tls_destroy( struct ldapoptions *lo )
107 {
108 if ( lo->ldo_tls_ctx ) {
109 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
110 lo->ldo_tls_ctx = NULL;
111 }
112
113 if ( lo->ldo_tls_certfile ) {
114 LDAP_FREE( lo->ldo_tls_certfile );
115 lo->ldo_tls_certfile = NULL;
116 }
117 if ( lo->ldo_tls_keyfile ) {
118 LDAP_FREE( lo->ldo_tls_keyfile );
119 lo->ldo_tls_keyfile = NULL;
120 }
121 if ( lo->ldo_tls_dhfile ) {
122 LDAP_FREE( lo->ldo_tls_dhfile );
123 lo->ldo_tls_dhfile = NULL;
124 }
125 if ( lo->ldo_tls_ecname ) {
126 LDAP_FREE( lo->ldo_tls_ecname );
127 lo->ldo_tls_ecname = NULL;
128 }
129 if ( lo->ldo_tls_cacertfile ) {
130 LDAP_FREE( lo->ldo_tls_cacertfile );
131 lo->ldo_tls_cacertfile = NULL;
132 }
133 if ( lo->ldo_tls_cacertdir ) {
134 LDAP_FREE( lo->ldo_tls_cacertdir );
135 lo->ldo_tls_cacertdir = NULL;
136 }
137 if ( lo->ldo_tls_ciphersuite ) {
138 LDAP_FREE( lo->ldo_tls_ciphersuite );
139 lo->ldo_tls_ciphersuite = NULL;
140 }
141 if ( lo->ldo_tls_crlfile ) {
142 LDAP_FREE( lo->ldo_tls_crlfile );
143 lo->ldo_tls_crlfile = NULL;
144 }
145 /* tls_pin_hashalg and tls_pin share the same buffer */
146 if ( lo->ldo_tls_pin_hashalg ) {
147 LDAP_FREE( lo->ldo_tls_pin_hashalg );
148 lo->ldo_tls_pin_hashalg = NULL;
149 } else {
150 LDAP_FREE( lo->ldo_tls_pin.bv_val );
151 }
152 BER_BVZERO( &lo->ldo_tls_pin );
153 }
154
155 /*
156 * Tear down the TLS subsystem. Should only be called once.
157 */
158 void
ldap_pvt_tls_destroy(void)159 ldap_pvt_tls_destroy( void )
160 {
161 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
162
163 ldap_int_tls_destroy( lo );
164
165 tls_imp->ti_tls_destroy();
166 }
167
168 /*
169 * Initialize a particular TLS implementation.
170 * Called once per implementation.
171 */
172 static int
tls_init(tls_impl * impl,int do_threads)173 tls_init(tls_impl *impl, int do_threads )
174 {
175 static int tls_initialized = 0;
176
177 if ( !tls_initialized++ ) {
178 #ifdef LDAP_R_COMPILE
179 ldap_pvt_thread_mutex_init( &tls_def_ctx_mutex );
180 #endif
181 }
182
183 if ( impl->ti_inited++ ) return 0;
184
185 if ( do_threads ) {
186 #ifdef LDAP_R_COMPILE
187 impl->ti_thr_init();
188 #endif
189 }
190
191 return impl->ti_tls_init();
192 }
193
194 /*
195 * Initialize TLS subsystem. Called once per implementation.
196 */
197 int
ldap_pvt_tls_init(int do_threads)198 ldap_pvt_tls_init( int do_threads )
199 {
200 return tls_init( tls_imp, do_threads );
201 }
202
203 /*
204 * initialize a new TLS context
205 */
206 static int
ldap_int_tls_init_ctx(struct ldapoptions * lo,int is_server)207 ldap_int_tls_init_ctx( struct ldapoptions *lo, int is_server )
208 {
209 int rc = 0;
210 tls_impl *ti = tls_imp;
211 struct ldaptls lts = lo->ldo_tls_info;
212
213 if ( lo->ldo_tls_ctx )
214 return 0;
215
216 tls_init( ti, 0 );
217
218 if ( is_server && !lts.lt_certfile && !lts.lt_keyfile &&
219 !lts.lt_cacertfile && !lts.lt_cacertdir &&
220 !lts.lt_cacert.bv_val && !lts.lt_cert.bv_val &&
221 !lts.lt_key.bv_val ) {
222 /* minimum configuration not provided */
223 return LDAP_NOT_SUPPORTED;
224 }
225
226 #ifdef HAVE_EBCDIC
227 /* This ASCII/EBCDIC handling is a real pain! */
228 if ( lts.lt_ciphersuite ) {
229 lts.lt_ciphersuite = LDAP_STRDUP( lts.lt_ciphersuite );
230 __atoe( lts.lt_ciphersuite );
231 }
232 if ( lts.lt_cacertfile ) {
233 lts.lt_cacertfile = LDAP_STRDUP( lts.lt_cacertfile );
234 __atoe( lts.lt_cacertfile );
235 }
236 if ( lts.lt_certfile ) {
237 lts.lt_certfile = LDAP_STRDUP( lts.lt_certfile );
238 __atoe( lts.lt_certfile );
239 }
240 if ( lts.lt_keyfile ) {
241 lts.lt_keyfile = LDAP_STRDUP( lts.lt_keyfile );
242 __atoe( lts.lt_keyfile );
243 }
244 if ( lts.lt_crlfile ) {
245 lts.lt_crlfile = LDAP_STRDUP( lts.lt_crlfile );
246 __atoe( lts.lt_crlfile );
247 }
248 if ( lts.lt_cacertdir ) {
249 lts.lt_cacertdir = LDAP_STRDUP( lts.lt_cacertdir );
250 __atoe( lts.lt_cacertdir );
251 }
252 if ( lts.lt_dhfile ) {
253 lts.lt_dhfile = LDAP_STRDUP( lts.lt_dhfile );
254 __atoe( lts.lt_dhfile );
255 }
256 if ( lts.lt_ecname ) {
257 lts.lt_ecname = LDAP_STRDUP( lts.lt_ecname );
258 __atoe( lts.lt_ecname );
259 }
260 #endif
261 lo->ldo_tls_ctx = ti->ti_ctx_new( lo );
262 if ( lo->ldo_tls_ctx == NULL ) {
263 Debug0( LDAP_DEBUG_ANY,
264 "TLS: could not allocate default ctx.\n" );
265 rc = -1;
266 goto error_exit;
267 }
268
269 rc = ti->ti_ctx_init( lo, <s, is_server );
270
271 error_exit:
272 if ( rc < 0 && lo->ldo_tls_ctx != NULL ) {
273 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
274 lo->ldo_tls_ctx = NULL;
275 }
276 #ifdef HAVE_EBCDIC
277 LDAP_FREE( lts.lt_ciphersuite );
278 LDAP_FREE( lts.lt_cacertfile );
279 LDAP_FREE( lts.lt_certfile );
280 LDAP_FREE( lts.lt_keyfile );
281 LDAP_FREE( lts.lt_crlfile );
282 LDAP_FREE( lts.lt_cacertdir );
283 LDAP_FREE( lts.lt_dhfile );
284 LDAP_FREE( lts.lt_ecname );
285 #endif
286 return rc;
287 }
288
289 /*
290 * initialize the default context
291 */
292 int
ldap_pvt_tls_init_def_ctx(int is_server)293 ldap_pvt_tls_init_def_ctx( int is_server )
294 {
295 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
296 int rc;
297 LDAP_MUTEX_LOCK( &tls_def_ctx_mutex );
298 rc = ldap_int_tls_init_ctx( lo, is_server );
299 LDAP_MUTEX_UNLOCK( &tls_def_ctx_mutex );
300 return rc;
301 }
302
303 static tls_session *
alloc_handle(void * ctx_arg,int is_server)304 alloc_handle( void *ctx_arg, int is_server )
305 {
306 tls_ctx *ctx;
307 tls_session *ssl;
308
309 if ( ctx_arg ) {
310 ctx = ctx_arg;
311 } else {
312 struct ldapoptions *lo = LDAP_INT_GLOBAL_OPT();
313 if ( ldap_pvt_tls_init_def_ctx( is_server ) < 0 ) return NULL;
314 ctx = lo->ldo_tls_ctx;
315 }
316
317 ssl = tls_imp->ti_session_new( ctx, is_server );
318 if ( ssl == NULL ) {
319 Debug0( LDAP_DEBUG_ANY,"TLS: can't create ssl handle.\n" );
320 return NULL;
321 }
322 return ssl;
323 }
324
325 static int
update_flags(Sockbuf * sb,tls_session * ssl,int rc)326 update_flags( Sockbuf *sb, tls_session * ssl, int rc )
327 {
328 sb->sb_trans_needs_read = 0;
329 sb->sb_trans_needs_write = 0;
330
331 return tls_imp->ti_session_upflags( sb, ssl, rc );
332 }
333
334 /*
335 * Call this to do a TLS connect on a sockbuf. ctx_arg can be
336 * a SSL_CTX * or NULL, in which case the default ctx is used.
337 *
338 * Return value:
339 *
340 * 0 - Success. Connection is ready for communication.
341 * <0 - Error. Can't create a TLS stream.
342 * >0 - Partial success.
343 * Do a select (using information from lber_pvt_sb_needs_{read,write}
344 * and call again.
345 */
346
347 static int
ldap_int_tls_connect(LDAP * ld,LDAPConn * conn,const char * host)348 ldap_int_tls_connect( LDAP *ld, LDAPConn *conn, const char *host )
349 {
350 Sockbuf *sb = conn->lconn_sb;
351 int err;
352 tls_session *ssl = NULL;
353 char *sni = (char *)host;
354
355 if ( HAS_TLS( sb )) {
356 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
357 } else {
358 struct ldapoptions *lo;
359 tls_ctx *ctx;
360
361 ctx = ld->ld_options.ldo_tls_ctx;
362
363 ssl = alloc_handle( ctx, 0 );
364
365 if ( ssl == NULL ) return -1;
366
367 #ifdef LDAP_DEBUG
368 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
369 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
370 #endif
371 ber_sockbuf_add_io( sb, tls_imp->ti_sbio,
372 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
373
374 lo = LDAP_INT_GLOBAL_OPT();
375 if( ctx == NULL ) {
376 ctx = lo->ldo_tls_ctx;
377 ld->ld_options.ldo_tls_ctx = ctx;
378 tls_ctx_ref( ctx );
379 }
380 if ( ld->ld_options.ldo_tls_connect_cb )
381 ld->ld_options.ldo_tls_connect_cb( ld, ssl, ctx,
382 ld->ld_options.ldo_tls_connect_arg );
383 if ( lo && lo->ldo_tls_connect_cb && lo->ldo_tls_connect_cb !=
384 ld->ld_options.ldo_tls_connect_cb )
385 lo->ldo_tls_connect_cb( ld, ssl, ctx, lo->ldo_tls_connect_arg );
386 }
387
388 /* pass hostname for SNI, but only if it's an actual name
389 * and not a numeric address
390 */
391 {
392 int numeric = 1;
393 char *c;
394 for ( c = sni; *c; c++ ) {
395 if ( *c == ':' ) /* IPv6 address */
396 break;
397 if ( *c == '.' )
398 continue;
399 if ( !isdigit( (unsigned char)*c )) {
400 numeric = 0;
401 break;
402 }
403 }
404 if ( numeric )
405 sni = NULL;
406 }
407 err = tls_imp->ti_session_connect( ld, ssl, sni );
408
409 #ifdef HAVE_WINSOCK
410 errno = WSAGetLastError();
411 #endif
412
413 if ( err == 0 ) {
414 err = ldap_pvt_tls_check_hostname( ld, ssl, host );
415 }
416
417 if ( err < 0 )
418 {
419 char buf[256], *msg;
420 if ( update_flags( sb, ssl, err )) {
421 return 1;
422 }
423
424 msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) );
425 if ( msg ) {
426 if ( ld->ld_error ) {
427 LDAP_FREE( ld->ld_error );
428 }
429 ld->ld_error = LDAP_STRDUP( msg );
430 #ifdef HAVE_EBCDIC
431 if ( ld->ld_error ) __etoa(ld->ld_error);
432 #endif
433 }
434
435 Debug1( LDAP_DEBUG_ANY,"TLS: can't connect: %s.\n",
436 ld->ld_error ? ld->ld_error : "" );
437
438 ber_sockbuf_remove_io( sb, tls_imp->ti_sbio,
439 LBER_SBIOD_LEVEL_TRANSPORT );
440 #ifdef LDAP_DEBUG
441 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
442 LBER_SBIOD_LEVEL_TRANSPORT );
443 #endif
444 return -1;
445 }
446
447 return 0;
448 }
449
450 int
ldap_pvt_tls_connect(LDAP * ld,Sockbuf * sb,const char * host)451 ldap_pvt_tls_connect( LDAP *ld, Sockbuf *sb, const char *host )
452 {
453 LDAPConn conn = { .lconn_sb = sb };
454 return ldap_int_tls_connect( ld, &conn, host );
455 }
456
457 /*
458 * Call this to do a TLS accept on a sockbuf.
459 * Everything else is the same as with tls_connect.
460 */
461 int
ldap_pvt_tls_accept(Sockbuf * sb,void * ctx_arg)462 ldap_pvt_tls_accept( Sockbuf *sb, void *ctx_arg )
463 {
464 int err;
465 tls_session *ssl = NULL;
466
467 if ( HAS_TLS( sb )) {
468 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&ssl );
469 } else {
470 ssl = alloc_handle( ctx_arg, 1 );
471 if ( ssl == NULL ) return -1;
472
473 #ifdef LDAP_DEBUG
474 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
475 LBER_SBIOD_LEVEL_TRANSPORT, (void *)"tls_" );
476 #endif
477 ber_sockbuf_add_io( sb, tls_imp->ti_sbio,
478 LBER_SBIOD_LEVEL_TRANSPORT, (void *)ssl );
479 }
480
481 err = tls_imp->ti_session_accept( ssl );
482
483 #ifdef HAVE_WINSOCK
484 errno = WSAGetLastError();
485 #endif
486
487 if ( err < 0 )
488 {
489 if ( update_flags( sb, ssl, err )) return 1;
490
491 if ( DebugTest( LDAP_DEBUG_ANY ) ) {
492 char buf[256], *msg;
493 msg = tls_imp->ti_session_errmsg( ssl, err, buf, sizeof(buf) );
494 Debug1( LDAP_DEBUG_ANY,"TLS: can't accept: %s.\n",
495 msg ? msg : "(unknown)" );
496 }
497
498 ber_sockbuf_remove_io( sb, tls_imp->ti_sbio,
499 LBER_SBIOD_LEVEL_TRANSPORT );
500 #ifdef LDAP_DEBUG
501 ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
502 LBER_SBIOD_LEVEL_TRANSPORT );
503 #endif
504 return -1;
505 }
506 return 0;
507 }
508
509 int
ldap_pvt_tls_inplace(Sockbuf * sb)510 ldap_pvt_tls_inplace ( Sockbuf *sb )
511 {
512 return HAS_TLS( sb ) ? 1 : 0;
513 }
514
515 int
ldap_tls_inplace(LDAP * ld)516 ldap_tls_inplace( LDAP *ld )
517 {
518 Sockbuf *sb = NULL;
519
520 if ( ld->ld_defconn && ld->ld_defconn->lconn_sb ) {
521 sb = ld->ld_defconn->lconn_sb;
522
523 } else if ( ld->ld_sb ) {
524 sb = ld->ld_sb;
525
526 } else {
527 return 0;
528 }
529
530 return ldap_pvt_tls_inplace( sb );
531 }
532
533 int
ldap_pvt_tls_get_peer_dn(void * s,struct berval * dn,LDAPDN_rewrite_dummy * func,unsigned flags)534 ldap_pvt_tls_get_peer_dn( void *s, struct berval *dn,
535 LDAPDN_rewrite_dummy *func, unsigned flags )
536 {
537 tls_session *session = s;
538 struct berval bvdn;
539 int rc;
540
541 rc = tls_imp->ti_session_peer_dn( session, &bvdn );
542 if ( rc ) return rc;
543
544 rc = ldap_X509dn2bv( &bvdn, dn,
545 (LDAPDN_rewrite_func *)func, flags);
546 return rc;
547 }
548
549 int
ldap_pvt_tls_check_hostname(LDAP * ld,void * s,const char * name_in)550 ldap_pvt_tls_check_hostname( LDAP *ld, void *s, const char *name_in )
551 {
552 tls_session *session = s;
553
554 if (ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_NEVER &&
555 ld->ld_options.ldo_tls_require_cert != LDAP_OPT_X_TLS_ALLOW) {
556 ld->ld_errno = tls_imp->ti_session_chkhost( ld, session, name_in );
557 if (ld->ld_errno != LDAP_SUCCESS) {
558 return ld->ld_errno;
559 }
560 }
561
562 /*
563 * If instructed to do pinning, do it now
564 */
565 if ( !BER_BVISNULL( &ld->ld_options.ldo_tls_pin ) ) {
566 ld->ld_errno = tls_imp->ti_session_pinning( ld, s,
567 ld->ld_options.ldo_tls_pin_hashalg,
568 &ld->ld_options.ldo_tls_pin );
569 if (ld->ld_errno != LDAP_SUCCESS) {
570 return ld->ld_errno;
571 }
572 }
573
574 return LDAP_SUCCESS;
575 }
576
577 int
ldap_pvt_tls_config(LDAP * ld,int option,const char * arg)578 ldap_pvt_tls_config( LDAP *ld, int option, const char *arg )
579 {
580 int i;
581
582 switch( option ) {
583 case LDAP_OPT_X_TLS_CACERTFILE:
584 case LDAP_OPT_X_TLS_CACERTDIR:
585 case LDAP_OPT_X_TLS_CERTFILE:
586 case LDAP_OPT_X_TLS_KEYFILE:
587 case LDAP_OPT_X_TLS_RANDOM_FILE:
588 case LDAP_OPT_X_TLS_CIPHER_SUITE:
589 case LDAP_OPT_X_TLS_DHFILE:
590 case LDAP_OPT_X_TLS_PEERKEY_HASH:
591 case LDAP_OPT_X_TLS_ECNAME:
592 case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
593 return ldap_pvt_tls_set_option( ld, option, (void *) arg );
594
595 case LDAP_OPT_X_TLS_REQUIRE_CERT:
596 case LDAP_OPT_X_TLS_REQUIRE_SAN:
597 case LDAP_OPT_X_TLS:
598 i = -1;
599 if ( strcasecmp( arg, "never" ) == 0 ) {
600 i = LDAP_OPT_X_TLS_NEVER ;
601
602 } else if ( strcasecmp( arg, "demand" ) == 0 ) {
603 i = LDAP_OPT_X_TLS_DEMAND ;
604
605 } else if ( strcasecmp( arg, "allow" ) == 0 ) {
606 i = LDAP_OPT_X_TLS_ALLOW ;
607
608 } else if ( strcasecmp( arg, "try" ) == 0 ) {
609 i = LDAP_OPT_X_TLS_TRY ;
610
611 } else if ( ( strcasecmp( arg, "hard" ) == 0 ) ||
612 ( strcasecmp( arg, "on" ) == 0 ) ||
613 ( strcasecmp( arg, "yes" ) == 0) ||
614 ( strcasecmp( arg, "true" ) == 0 ) )
615 {
616 i = LDAP_OPT_X_TLS_HARD ;
617 }
618
619 if (i >= 0) {
620 return ldap_pvt_tls_set_option( ld, option, &i );
621 }
622 return -1;
623 case LDAP_OPT_X_TLS_PROTOCOL_MAX:
624 case LDAP_OPT_X_TLS_PROTOCOL_MIN: {
625 char *next;
626 long l;
627 l = strtol( arg, &next, 10 );
628 if ( l < 0 || l > 0xff || next == arg ||
629 ( *next != '\0' && *next != '.' ) )
630 return -1;
631 i = l << 8;
632 if (*next == '.') {
633 arg = next + 1;
634 l = strtol( arg, &next, 10 );
635 if ( l < 0 || l > 0xff || next == arg || *next != '\0' )
636 return -1;
637 i += l;
638 }
639 return ldap_pvt_tls_set_option( ld, option, &i );
640 }
641 #ifdef HAVE_OPENSSL
642 case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */
643 i = -1;
644 if ( strcasecmp( arg, "none" ) == 0 ) {
645 i = LDAP_OPT_X_TLS_CRL_NONE ;
646 } else if ( strcasecmp( arg, "peer" ) == 0 ) {
647 i = LDAP_OPT_X_TLS_CRL_PEER ;
648 } else if ( strcasecmp( arg, "all" ) == 0 ) {
649 i = LDAP_OPT_X_TLS_CRL_ALL ;
650 }
651 if (i >= 0) {
652 return ldap_pvt_tls_set_option( ld, option, &i );
653 }
654 return -1;
655 #endif
656 }
657 return -1;
658 }
659
660 int
ldap_pvt_tls_get_option(LDAP * ld,int option,void * arg)661 ldap_pvt_tls_get_option( LDAP *ld, int option, void *arg )
662 {
663 struct ldapoptions *lo;
664
665 if( option == LDAP_OPT_X_TLS_PACKAGE ) {
666 *(char **)arg = LDAP_STRDUP( tls_imp->ti_name );
667 return 0;
668 }
669
670 if( ld != NULL ) {
671 assert( LDAP_VALID( ld ) );
672
673 if( !LDAP_VALID( ld ) ) {
674 return LDAP_OPT_ERROR;
675 }
676
677 lo = &ld->ld_options;
678
679 } else {
680 /* Get pointer to global option structure */
681 lo = LDAP_INT_GLOBAL_OPT();
682 if ( lo == NULL ) {
683 return LDAP_NO_MEMORY;
684 }
685 }
686
687 switch( option ) {
688 case LDAP_OPT_X_TLS:
689 *(int *)arg = lo->ldo_tls_mode;
690 break;
691 case LDAP_OPT_X_TLS_CTX:
692 *(void **)arg = lo->ldo_tls_ctx;
693 if ( lo->ldo_tls_ctx ) {
694 tls_ctx_ref( lo->ldo_tls_ctx );
695 }
696 break;
697 case LDAP_OPT_X_TLS_CACERTFILE:
698 *(char **)arg = lo->ldo_tls_cacertfile ?
699 LDAP_STRDUP( lo->ldo_tls_cacertfile ) : NULL;
700 break;
701 case LDAP_OPT_X_TLS_CACERTDIR:
702 *(char **)arg = lo->ldo_tls_cacertdir ?
703 LDAP_STRDUP( lo->ldo_tls_cacertdir ) : NULL;
704 break;
705 case LDAP_OPT_X_TLS_CERTFILE:
706 *(char **)arg = lo->ldo_tls_certfile ?
707 LDAP_STRDUP( lo->ldo_tls_certfile ) : NULL;
708 break;
709 case LDAP_OPT_X_TLS_KEYFILE:
710 *(char **)arg = lo->ldo_tls_keyfile ?
711 LDAP_STRDUP( lo->ldo_tls_keyfile ) : NULL;
712 break;
713 case LDAP_OPT_X_TLS_DHFILE:
714 *(char **)arg = lo->ldo_tls_dhfile ?
715 LDAP_STRDUP( lo->ldo_tls_dhfile ) : NULL;
716 break;
717 case LDAP_OPT_X_TLS_ECNAME:
718 *(char **)arg = lo->ldo_tls_ecname ?
719 LDAP_STRDUP( lo->ldo_tls_ecname ) : NULL;
720 break;
721 case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
722 *(char **)arg = lo->ldo_tls_crlfile ?
723 LDAP_STRDUP( lo->ldo_tls_crlfile ) : NULL;
724 break;
725 case LDAP_OPT_X_TLS_REQUIRE_CERT:
726 *(int *)arg = lo->ldo_tls_require_cert;
727 break;
728 case LDAP_OPT_X_TLS_REQUIRE_SAN:
729 *(int *)arg = lo->ldo_tls_require_san;
730 break;
731 #ifdef HAVE_OPENSSL
732 case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */
733 *(int *)arg = lo->ldo_tls_crlcheck;
734 break;
735 #endif
736 case LDAP_OPT_X_TLS_CIPHER_SUITE:
737 *(char **)arg = lo->ldo_tls_ciphersuite ?
738 LDAP_STRDUP( lo->ldo_tls_ciphersuite ) : NULL;
739 break;
740 case LDAP_OPT_X_TLS_PROTOCOL_MIN:
741 *(int *)arg = lo->ldo_tls_protocol_min;
742 break;
743 case LDAP_OPT_X_TLS_PROTOCOL_MAX:
744 *(int *)arg = lo->ldo_tls_protocol_max;
745 break;
746 case LDAP_OPT_X_TLS_RANDOM_FILE:
747 *(char **)arg = lo->ldo_tls_randfile ?
748 LDAP_STRDUP( lo->ldo_tls_randfile ) : NULL;
749 break;
750 case LDAP_OPT_X_TLS_SSL_CTX: {
751 void *retval = 0;
752 if ( ld != NULL ) {
753 LDAPConn *conn = ld->ld_defconn;
754 if ( conn != NULL ) {
755 Sockbuf *sb = conn->lconn_sb;
756 retval = ldap_pvt_tls_sb_ctx( sb );
757 }
758 }
759 *(void **)arg = retval;
760 break;
761 }
762 case LDAP_OPT_X_TLS_CONNECT_CB:
763 *(LDAP_TLS_CONNECT_CB **)arg = lo->ldo_tls_connect_cb;
764 break;
765 case LDAP_OPT_X_TLS_CONNECT_ARG:
766 *(void **)arg = lo->ldo_tls_connect_arg;
767 break;
768 case LDAP_OPT_X_TLS_VERSION: {
769 void *sess = NULL;
770 const char *retval = NULL;
771 if ( ld != NULL ) {
772 LDAPConn *conn = ld->ld_defconn;
773 if ( conn != NULL ) {
774 Sockbuf *sb = conn->lconn_sb;
775 sess = ldap_pvt_tls_sb_ctx( sb );
776 if ( sess != NULL )
777 retval = ldap_pvt_tls_get_version( sess );
778 }
779 }
780 *(char **)arg = retval ? LDAP_STRDUP( retval ) : NULL;
781 break;
782 }
783 case LDAP_OPT_X_TLS_CIPHER: {
784 void *sess = NULL;
785 const char *retval = NULL;
786 if ( ld != NULL ) {
787 LDAPConn *conn = ld->ld_defconn;
788 if ( conn != NULL ) {
789 Sockbuf *sb = conn->lconn_sb;
790 sess = ldap_pvt_tls_sb_ctx( sb );
791 if ( sess != NULL )
792 retval = ldap_pvt_tls_get_cipher( sess );
793 }
794 }
795 *(char **)arg = retval ? LDAP_STRDUP( retval ) : NULL;
796 break;
797 }
798 case LDAP_OPT_X_TLS_PEERCERT: {
799 void *sess = NULL;
800 struct berval *bv = arg;
801 bv->bv_len = 0;
802 bv->bv_val = NULL;
803 if ( ld != NULL ) {
804 LDAPConn *conn = ld->ld_defconn;
805 if ( conn != NULL ) {
806 Sockbuf *sb = conn->lconn_sb;
807 sess = ldap_pvt_tls_sb_ctx( sb );
808 if ( sess != NULL )
809 return ldap_pvt_tls_get_peercert( sess, bv );
810 }
811 }
812 break;
813 }
814 case LDAP_OPT_X_TLS_CACERT: {
815 struct berval *bv = arg;
816 if ( lo->ldo_tls_cacert.bv_val ) {
817 ber_dupbv( bv, &lo->ldo_tls_cacert );
818 } else {
819 BER_BVZERO( bv );
820 }
821 break;
822 }
823 case LDAP_OPT_X_TLS_CERT: {
824 struct berval *bv = arg;
825 if ( lo->ldo_tls_cert.bv_val ) {
826 ber_dupbv( bv, &lo->ldo_tls_cert );
827 } else {
828 BER_BVZERO( bv );
829 }
830 break;
831 }
832 case LDAP_OPT_X_TLS_KEY: {
833 struct berval *bv = arg;
834 if ( lo->ldo_tls_key.bv_val ) {
835 ber_dupbv( bv, &lo->ldo_tls_key );
836 } else {
837 BER_BVZERO( bv );
838 }
839 break;
840 }
841
842 default:
843 return -1;
844 }
845 return 0;
846 }
847
848 int
ldap_pvt_tls_set_option(LDAP * ld,int option,void * arg)849 ldap_pvt_tls_set_option( LDAP *ld, int option, void *arg )
850 {
851 struct ldapoptions *lo;
852
853 if( ld != NULL ) {
854 assert( LDAP_VALID( ld ) );
855
856 if( !LDAP_VALID( ld ) ) {
857 return LDAP_OPT_ERROR;
858 }
859
860 lo = &ld->ld_options;
861
862 } else {
863 /* Get pointer to global option structure */
864 lo = LDAP_INT_GLOBAL_OPT();
865 if ( lo == NULL ) {
866 return LDAP_NO_MEMORY;
867 }
868 }
869
870 switch( option ) {
871 case LDAP_OPT_X_TLS:
872 if ( !arg ) return -1;
873
874 switch( *(int *) arg ) {
875 case LDAP_OPT_X_TLS_NEVER:
876 case LDAP_OPT_X_TLS_DEMAND:
877 case LDAP_OPT_X_TLS_ALLOW:
878 case LDAP_OPT_X_TLS_TRY:
879 case LDAP_OPT_X_TLS_HARD:
880 if (lo != NULL) {
881 lo->ldo_tls_mode = *(int *)arg;
882 }
883
884 return 0;
885 }
886 return -1;
887
888 case LDAP_OPT_X_TLS_CTX:
889 if ( lo->ldo_tls_ctx )
890 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
891 lo->ldo_tls_ctx = arg;
892 tls_ctx_ref( lo->ldo_tls_ctx );
893 return 0;
894 case LDAP_OPT_X_TLS_CONNECT_CB:
895 lo->ldo_tls_connect_cb = (LDAP_TLS_CONNECT_CB *)arg;
896 return 0;
897 case LDAP_OPT_X_TLS_CONNECT_ARG:
898 lo->ldo_tls_connect_arg = arg;
899 return 0;
900 case LDAP_OPT_X_TLS_CACERTFILE:
901 if ( lo->ldo_tls_cacertfile ) LDAP_FREE( lo->ldo_tls_cacertfile );
902 lo->ldo_tls_cacertfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
903 return 0;
904 case LDAP_OPT_X_TLS_CACERTDIR:
905 if ( lo->ldo_tls_cacertdir ) LDAP_FREE( lo->ldo_tls_cacertdir );
906 lo->ldo_tls_cacertdir = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
907 return 0;
908 case LDAP_OPT_X_TLS_CERTFILE:
909 if ( lo->ldo_tls_certfile ) LDAP_FREE( lo->ldo_tls_certfile );
910 lo->ldo_tls_certfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
911 return 0;
912 case LDAP_OPT_X_TLS_KEYFILE:
913 if ( lo->ldo_tls_keyfile ) LDAP_FREE( lo->ldo_tls_keyfile );
914 lo->ldo_tls_keyfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
915 return 0;
916 case LDAP_OPT_X_TLS_DHFILE:
917 if ( lo->ldo_tls_dhfile ) LDAP_FREE( lo->ldo_tls_dhfile );
918 lo->ldo_tls_dhfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
919 return 0;
920 case LDAP_OPT_X_TLS_ECNAME:
921 if ( lo->ldo_tls_ecname ) LDAP_FREE( lo->ldo_tls_ecname );
922 lo->ldo_tls_ecname = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
923 return 0;
924 case LDAP_OPT_X_TLS_CRLFILE: /* GnuTLS only */
925 if ( lo->ldo_tls_crlfile ) LDAP_FREE( lo->ldo_tls_crlfile );
926 lo->ldo_tls_crlfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
927 return 0;
928 case LDAP_OPT_X_TLS_REQUIRE_CERT:
929 if ( !arg ) return -1;
930 switch( *(int *) arg ) {
931 case LDAP_OPT_X_TLS_NEVER:
932 case LDAP_OPT_X_TLS_DEMAND:
933 case LDAP_OPT_X_TLS_ALLOW:
934 case LDAP_OPT_X_TLS_TRY:
935 case LDAP_OPT_X_TLS_HARD:
936 lo->ldo_tls_require_cert = * (int *) arg;
937 return 0;
938 }
939 return -1;
940 case LDAP_OPT_X_TLS_REQUIRE_SAN:
941 if ( !arg ) return -1;
942 switch( *(int *) arg ) {
943 case LDAP_OPT_X_TLS_NEVER:
944 case LDAP_OPT_X_TLS_DEMAND:
945 case LDAP_OPT_X_TLS_ALLOW:
946 case LDAP_OPT_X_TLS_TRY:
947 case LDAP_OPT_X_TLS_HARD:
948 lo->ldo_tls_require_san = * (int *) arg;
949 return 0;
950 }
951 return -1;
952 #ifdef HAVE_OPENSSL
953 case LDAP_OPT_X_TLS_CRLCHECK: /* OpenSSL only */
954 if ( !arg ) return -1;
955 switch( *(int *) arg ) {
956 case LDAP_OPT_X_TLS_CRL_NONE:
957 case LDAP_OPT_X_TLS_CRL_PEER:
958 case LDAP_OPT_X_TLS_CRL_ALL:
959 lo->ldo_tls_crlcheck = * (int *) arg;
960 return 0;
961 }
962 return -1;
963 #endif
964 case LDAP_OPT_X_TLS_CIPHER_SUITE:
965 if ( lo->ldo_tls_ciphersuite ) LDAP_FREE( lo->ldo_tls_ciphersuite );
966 lo->ldo_tls_ciphersuite = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
967 return 0;
968
969 case LDAP_OPT_X_TLS_PROTOCOL_MIN:
970 if ( !arg ) return -1;
971 lo->ldo_tls_protocol_min = *(int *)arg;
972 return 0;
973 case LDAP_OPT_X_TLS_PROTOCOL_MAX:
974 if ( !arg ) return -1;
975 lo->ldo_tls_protocol_max = *(int *)arg;
976 return 0;
977 case LDAP_OPT_X_TLS_RANDOM_FILE:
978 if ( ld != NULL )
979 return -1;
980 if ( lo->ldo_tls_randfile ) LDAP_FREE (lo->ldo_tls_randfile );
981 lo->ldo_tls_randfile = (arg && *(char *)arg) ? LDAP_STRDUP( (char *) arg ) : NULL;
982 break;
983 case LDAP_OPT_X_TLS_NEWCTX:
984 if ( !arg ) return -1;
985 if ( lo->ldo_tls_ctx )
986 ldap_pvt_tls_ctx_free( lo->ldo_tls_ctx );
987 lo->ldo_tls_ctx = NULL;
988 return ldap_int_tls_init_ctx( lo, *(int *)arg );
989 case LDAP_OPT_X_TLS_CACERT:
990 if ( lo->ldo_tls_cacert.bv_val )
991 LDAP_FREE( lo->ldo_tls_cacert.bv_val );
992 if ( arg ) {
993 lo->ldo_tls_cacert.bv_len = ((struct berval *)arg)->bv_len;
994 lo->ldo_tls_cacert.bv_val = LDAP_MALLOC( lo->ldo_tls_cacert.bv_len );
995 if ( !lo->ldo_tls_cacert.bv_val )
996 return -1;
997 AC_MEMCPY( lo->ldo_tls_cacert.bv_val, ((struct berval *)arg)->bv_val, lo->ldo_tls_cacert.bv_len );
998 } else {
999 BER_BVZERO( &lo->ldo_tls_cacert );
1000 }
1001 break;
1002 case LDAP_OPT_X_TLS_CERT:
1003 if ( lo->ldo_tls_cert.bv_val )
1004 LDAP_FREE( lo->ldo_tls_cert.bv_val );
1005 if ( arg ) {
1006 lo->ldo_tls_cert.bv_len = ((struct berval *)arg)->bv_len;
1007 lo->ldo_tls_cert.bv_val = LDAP_MALLOC( lo->ldo_tls_cert.bv_len );
1008 if ( !lo->ldo_tls_cert.bv_val )
1009 return -1;
1010 AC_MEMCPY( lo->ldo_tls_cert.bv_val, ((struct berval *)arg)->bv_val, lo->ldo_tls_cert.bv_len );
1011 } else {
1012 BER_BVZERO( &lo->ldo_tls_cert );
1013 }
1014 break;
1015 case LDAP_OPT_X_TLS_KEY:
1016 if ( lo->ldo_tls_key.bv_val )
1017 LDAP_FREE( lo->ldo_tls_key.bv_val );
1018 if ( arg ) {
1019 lo->ldo_tls_key.bv_len = ((struct berval *)arg)->bv_len;
1020 lo->ldo_tls_key.bv_val = LDAP_MALLOC( lo->ldo_tls_key.bv_len );
1021 if ( !lo->ldo_tls_key.bv_val )
1022 return -1;
1023 AC_MEMCPY( lo->ldo_tls_key.bv_val, ((struct berval *)arg)->bv_val, lo->ldo_tls_key.bv_len );
1024 } else {
1025 BER_BVZERO( &lo->ldo_tls_key );
1026 }
1027 break;
1028 case LDAP_OPT_X_TLS_PEERKEY_HASH: {
1029 /* arg = "[hashalg:]pubkey_hash" */
1030 struct berval bv;
1031 char *p, *pin = arg;
1032 int rc = LDAP_SUCCESS;
1033
1034 if ( !tls_imp->ti_session_pinning ) return -1;
1035
1036 if ( !pin || !*pin ) {
1037 if ( lo->ldo_tls_pin_hashalg ) {
1038 LDAP_FREE( lo->ldo_tls_pin_hashalg );
1039 } else if ( lo->ldo_tls_pin.bv_val ) {
1040 LDAP_FREE( lo->ldo_tls_pin.bv_val );
1041 }
1042 lo->ldo_tls_pin_hashalg = NULL;
1043 BER_BVZERO( &lo->ldo_tls_pin );
1044 return rc;
1045 }
1046
1047 pin = LDAP_STRDUP( pin );
1048 p = strchr( pin, ':' );
1049
1050 /* pubkey (its hash) goes in bv, alg in p */
1051 if ( p ) {
1052 *p = '\0';
1053 bv.bv_val = p+1;
1054 p = pin;
1055 } else {
1056 bv.bv_val = pin;
1057 }
1058
1059 bv.bv_len = strlen(bv.bv_val);
1060 if ( ldap_int_decode_b64_inplace( &bv ) ) {
1061 LDAP_FREE( pin );
1062 return -1;
1063 }
1064
1065 if ( ld != NULL ) {
1066 LDAPConn *conn = ld->ld_defconn;
1067 if ( conn != NULL ) {
1068 Sockbuf *sb = conn->lconn_sb;
1069 void *sess = ldap_pvt_tls_sb_ctx( sb );
1070 if ( sess != NULL ) {
1071 rc = tls_imp->ti_session_pinning( ld, sess, p, &bv );
1072 }
1073 }
1074 }
1075
1076 if ( rc == LDAP_SUCCESS ) {
1077 if ( lo->ldo_tls_pin_hashalg ) {
1078 LDAP_FREE( lo->ldo_tls_pin_hashalg );
1079 } else if ( lo->ldo_tls_pin.bv_val ) {
1080 LDAP_FREE( lo->ldo_tls_pin.bv_val );
1081 }
1082 lo->ldo_tls_pin_hashalg = p;
1083 lo->ldo_tls_pin = bv;
1084 } else {
1085 LDAP_FREE( pin );
1086 }
1087
1088 return rc;
1089 }
1090 default:
1091 return -1;
1092 }
1093 return 0;
1094 }
1095
1096 int
ldap_int_tls_start(LDAP * ld,LDAPConn * conn,LDAPURLDesc * srv)1097 ldap_int_tls_start ( LDAP *ld, LDAPConn *conn, LDAPURLDesc *srv )
1098 {
1099 Sockbuf *sb;
1100 char *host;
1101 void *ssl;
1102 int ret, async;
1103 struct timeval start_time_tv, tv, tv0;
1104 ber_socket_t sd = AC_SOCKET_ERROR;
1105
1106 if ( !conn )
1107 return LDAP_PARAM_ERROR;
1108
1109 sb = conn->lconn_sb;
1110 if( srv ) {
1111 host = srv->lud_host;
1112 } else {
1113 host = conn->lconn_server->lud_host;
1114 }
1115
1116 /* avoid NULL host */
1117 if( host == NULL ) {
1118 host = "localhost";
1119 }
1120
1121 (void) tls_init( tls_imp, 0 );
1122
1123 /*
1124 * Use non-blocking io during SSL Handshake when a timeout is configured
1125 */
1126 async = LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_CONNECT_ASYNC );
1127 if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
1128 if ( !async ) {
1129 /* if async, this has already been set */
1130 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_NONBLOCK, (void*)1 );
1131 }
1132 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
1133 tv = ld->ld_options.ldo_tm_net;
1134 tv0 = tv;
1135 #ifdef HAVE_GETTIMEOFDAY
1136 gettimeofday( &start_time_tv, NULL );
1137 #else /* ! HAVE_GETTIMEOFDAY */
1138 time( &start_time_tv.tv_sec );
1139 start_time_tv.tv_usec = 0;
1140 #endif /* ! HAVE_GETTIMEOFDAY */
1141 }
1142
1143 ld->ld_errno = LDAP_SUCCESS;
1144 ret = ldap_int_tls_connect( ld, conn, host );
1145
1146 /* this mainly only happens for non-blocking io
1147 * but can also happen when the handshake is too
1148 * big for a single network message.
1149 */
1150 while ( ret > 0 ) {
1151 if ( async ) {
1152 struct timeval curr_time_tv, delta_tv;
1153 int wr=0;
1154
1155 if ( sb->sb_trans_needs_read ) {
1156 wr=0;
1157 } else if ( sb->sb_trans_needs_write ) {
1158 wr=1;
1159 }
1160 Debug1( LDAP_DEBUG_TRACE, "ldap_int_tls_start: ldap_int_tls_connect needs %s\n",
1161 wr ? "write": "read" );
1162
1163 /* This is mostly copied from result.c:wait4msg(), should
1164 * probably be moved into a separate function */
1165 #ifdef HAVE_GETTIMEOFDAY
1166 gettimeofday( &curr_time_tv, NULL );
1167 #else /* ! HAVE_GETTIMEOFDAY */
1168 time( &curr_time_tv.tv_sec );
1169 curr_time_tv.tv_usec = 0;
1170 #endif /* ! HAVE_GETTIMEOFDAY */
1171
1172 /* delta = curr - start */
1173 delta_tv.tv_sec = curr_time_tv.tv_sec - start_time_tv.tv_sec;
1174 delta_tv.tv_usec = curr_time_tv.tv_usec - start_time_tv.tv_usec;
1175 if ( delta_tv.tv_usec < 0 ) {
1176 delta_tv.tv_sec--;
1177 delta_tv.tv_usec += 1000000;
1178 }
1179
1180 /* tv0 < delta ? */
1181 if ( ( tv0.tv_sec < delta_tv.tv_sec ) ||
1182 ( ( tv0.tv_sec == delta_tv.tv_sec ) &&
1183 ( tv0.tv_usec < delta_tv.tv_usec ) ) )
1184 {
1185 ret = -1;
1186 ld->ld_errno = LDAP_TIMEOUT;
1187 break;
1188 }
1189 /* timeout -= delta_time */
1190 tv0.tv_sec -= delta_tv.tv_sec;
1191 tv0.tv_usec -= delta_tv.tv_usec;
1192 if ( tv0.tv_usec < 0 ) {
1193 tv0.tv_sec--;
1194 tv0.tv_usec += 1000000;
1195 }
1196 start_time_tv.tv_sec = curr_time_tv.tv_sec;
1197 start_time_tv.tv_usec = curr_time_tv.tv_usec;
1198 tv = tv0;
1199 Debug3( LDAP_DEBUG_TRACE, "ldap_int_tls_start: ld %p %ld s %ld us to go\n",
1200 (void *)ld, (long) tv.tv_sec, (long) tv.tv_usec );
1201 ret = ldap_int_poll( ld, sd, &tv, wr);
1202 if ( ret < 0 ) {
1203 ld->ld_errno = LDAP_TIMEOUT;
1204 break;
1205 }
1206 }
1207 ret = ldap_int_tls_connect( ld, conn, host );
1208 }
1209
1210 if ( ret < 0 ) {
1211 if ( ld->ld_errno == LDAP_SUCCESS )
1212 ld->ld_errno = LDAP_CONNECT_ERROR;
1213 return (ld->ld_errno);
1214 }
1215
1216 return LDAP_SUCCESS;
1217 }
1218
1219 void *
ldap_pvt_tls_sb_ctx(Sockbuf * sb)1220 ldap_pvt_tls_sb_ctx( Sockbuf *sb )
1221 {
1222 void *p = NULL;
1223
1224 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_SSL, (void *)&p );
1225 return p;
1226 }
1227
1228 int
ldap_pvt_tls_get_strength(void * s)1229 ldap_pvt_tls_get_strength( void *s )
1230 {
1231 tls_session *session = s;
1232
1233 return tls_imp->ti_session_strength( session );
1234 }
1235
1236 int
ldap_pvt_tls_get_my_dn(void * s,struct berval * dn,LDAPDN_rewrite_dummy * func,unsigned flags)1237 ldap_pvt_tls_get_my_dn( void *s, struct berval *dn, LDAPDN_rewrite_dummy *func, unsigned flags )
1238 {
1239 tls_session *session = s;
1240 struct berval der_dn;
1241 int rc;
1242
1243 rc = tls_imp->ti_session_my_dn( session, &der_dn );
1244 if ( rc == LDAP_SUCCESS )
1245 rc = ldap_X509dn2bv(&der_dn, dn, (LDAPDN_rewrite_func *)func, flags );
1246 return rc;
1247 }
1248
1249 int
ldap_pvt_tls_get_unique(void * s,struct berval * buf,int is_server)1250 ldap_pvt_tls_get_unique( void *s, struct berval *buf, int is_server )
1251 {
1252 tls_session *session = s;
1253 return tls_imp->ti_session_unique( session, buf, is_server );
1254 }
1255
1256 int
ldap_pvt_tls_get_endpoint(void * s,struct berval * buf,int is_server)1257 ldap_pvt_tls_get_endpoint( void *s, struct berval *buf, int is_server )
1258 {
1259 tls_session *session = s;
1260 return tls_imp->ti_session_endpoint( session, buf, is_server );
1261 }
1262
1263 const char *
ldap_pvt_tls_get_version(void * s)1264 ldap_pvt_tls_get_version( void *s )
1265 {
1266 tls_session *session = s;
1267 return tls_imp->ti_session_version( session );
1268 }
1269
1270 const char *
ldap_pvt_tls_get_cipher(void * s)1271 ldap_pvt_tls_get_cipher( void *s )
1272 {
1273 tls_session *session = s;
1274 return tls_imp->ti_session_cipher( session );
1275 }
1276
1277 int
ldap_pvt_tls_get_peercert(void * s,struct berval * der)1278 ldap_pvt_tls_get_peercert( void *s, struct berval *der )
1279 {
1280 tls_session *session = s;
1281 return tls_imp->ti_session_peercert( session, der );
1282 }
1283 #endif /* HAVE_TLS */
1284
1285 int
ldap_start_tls(LDAP * ld,LDAPControl ** serverctrls,LDAPControl ** clientctrls,int * msgidp)1286 ldap_start_tls( LDAP *ld,
1287 LDAPControl **serverctrls,
1288 LDAPControl **clientctrls,
1289 int *msgidp )
1290 {
1291 return ldap_extended_operation( ld, LDAP_EXOP_START_TLS,
1292 NULL, serverctrls, clientctrls, msgidp );
1293 }
1294
1295 int
ldap_install_tls(LDAP * ld)1296 ldap_install_tls( LDAP *ld )
1297 {
1298 #ifndef HAVE_TLS
1299 return LDAP_NOT_SUPPORTED;
1300 #else
1301 if ( ldap_tls_inplace( ld ) ) {
1302 return LDAP_LOCAL_ERROR;
1303 }
1304
1305 return ldap_int_tls_start( ld, ld->ld_defconn, NULL );
1306 #endif
1307 }
1308
1309 int
ldap_start_tls_s(LDAP * ld,LDAPControl ** serverctrls,LDAPControl ** clientctrls)1310 ldap_start_tls_s ( LDAP *ld,
1311 LDAPControl **serverctrls,
1312 LDAPControl **clientctrls )
1313 {
1314 #ifndef HAVE_TLS
1315 return LDAP_NOT_SUPPORTED;
1316 #else
1317 int rc;
1318 char *rspoid = NULL;
1319 struct berval *rspdata = NULL;
1320
1321 /* XXYYZ: this initiates operation only on default connection! */
1322
1323 if ( ldap_tls_inplace( ld ) ) {
1324 return LDAP_LOCAL_ERROR;
1325 }
1326
1327 rc = ldap_extended_operation_s( ld, LDAP_EXOP_START_TLS,
1328 NULL, serverctrls, clientctrls, &rspoid, &rspdata );
1329
1330 if ( rspoid != NULL ) {
1331 LDAP_FREE(rspoid);
1332 }
1333
1334 if ( rspdata != NULL ) {
1335 ber_bvfree( rspdata );
1336 }
1337
1338 if ( rc == LDAP_SUCCESS ) {
1339 rc = ldap_int_tls_start( ld, ld->ld_defconn, NULL );
1340 }
1341
1342 return rc;
1343 #endif
1344 }
1345
1346 /* These tags probably all belong in lber.h, but they're
1347 * not normally encountered when processing LDAP, so maybe
1348 * they belong somewhere else instead.
1349 */
1350
1351 #define LBER_TAG_OID ((ber_tag_t) 0x06UL)
1352
1353 /* Tags for string types used in a DirectoryString.
1354 *
1355 * Note that IA5string is not one of the defined choices for
1356 * DirectoryString in X.520, but it gets used for email AVAs.
1357 */
1358 #define LBER_TAG_UTF8 ((ber_tag_t) 0x0cUL)
1359 #define LBER_TAG_PRINTABLE ((ber_tag_t) 0x13UL)
1360 #define LBER_TAG_TELETEX ((ber_tag_t) 0x14UL)
1361 #define LBER_TAG_IA5 ((ber_tag_t) 0x16UL)
1362 #define LBER_TAG_UNIVERSAL ((ber_tag_t) 0x1cUL)
1363 #define LBER_TAG_BMP ((ber_tag_t) 0x1eUL)
1364
1365 static oid_name *
find_oid(struct berval * oid)1366 find_oid( struct berval *oid )
1367 {
1368 int i;
1369
1370 for ( i=0; !BER_BVISNULL( &oids[i].oid ); i++ ) {
1371 if ( oids[i].oid.bv_len != oid->bv_len ) continue;
1372 if ( !strcmp( oids[i].oid.bv_val, oid->bv_val ))
1373 return &oids[i];
1374 }
1375 return NULL;
1376 }
1377
1378 /* Converts BER Bitstring value to LDAP BitString value (RFC4517)
1379 *
1380 * berValue : IN
1381 * rfc4517Value: OUT
1382 *
1383 * berValue and ldapValue should not be NULL
1384 */
1385
1386 #define BITS_PER_BYTE 8
1387 #define SQUOTE_LENGTH 1
1388 #define B_CHAR_LENGTH 1
1389 #define STR_OVERHEAD (2*SQUOTE_LENGTH + B_CHAR_LENGTH)
1390
1391 static int
der_to_ldap_BitString(struct berval * berValue,struct berval * ldapValue)1392 der_to_ldap_BitString (struct berval *berValue,
1393 struct berval *ldapValue)
1394 {
1395 ber_len_t bitPadding=0;
1396 ber_len_t bits, maxBits;
1397 char *tmpStr;
1398 unsigned char byte;
1399 ber_len_t bitLength;
1400 ber_len_t valLen;
1401 unsigned char* valPtr;
1402
1403 ldapValue->bv_len=0;
1404 ldapValue->bv_val=NULL;
1405
1406 /* Gets padding and points to binary data */
1407 valLen=berValue->bv_len;
1408 valPtr=(unsigned char*)berValue->bv_val;
1409 if (valLen) {
1410 bitPadding=(ber_len_t)(valPtr[0]);
1411 valLen--;
1412 valPtr++;
1413 }
1414 /* If Block is non DER encoding fixes to DER encoding */
1415 if (bitPadding >= BITS_PER_BYTE) {
1416 if (valLen*BITS_PER_BYTE > bitPadding ) {
1417 valLen-=(bitPadding/BITS_PER_BYTE);
1418 bitPadding%=BITS_PER_BYTE;
1419 } else {
1420 valLen=0;
1421 bitPadding=0;
1422 }
1423 }
1424 /* Just in case bad encoding */
1425 if (valLen*BITS_PER_BYTE < bitPadding ) {
1426 bitPadding=0;
1427 valLen=0;
1428 }
1429
1430 /* Gets buffer to hold RFC4517 Bit String format */
1431 bitLength=valLen*BITS_PER_BYTE-bitPadding;
1432 tmpStr=LDAP_MALLOC(bitLength + STR_OVERHEAD + 1);
1433
1434 if (!tmpStr)
1435 return LDAP_NO_MEMORY;
1436
1437 ldapValue->bv_val=tmpStr;
1438 ldapValue->bv_len=bitLength + STR_OVERHEAD;
1439
1440 /* Formatting in '*binary-digit'B format */
1441 maxBits=BITS_PER_BYTE;
1442 *tmpStr++ ='\'';
1443 while(valLen) {
1444 byte=*valPtr;
1445 if (valLen==1)
1446 maxBits-=bitPadding;
1447 for (bits=0; bits<maxBits; bits++) {
1448 if (0x80 & byte)
1449 *tmpStr='1';
1450 else
1451 *tmpStr='0';
1452 tmpStr++;
1453 byte<<=1;
1454 }
1455 valPtr++;
1456 valLen--;
1457 }
1458 *tmpStr++ ='\'';
1459 *tmpStr++ ='B';
1460 *tmpStr=0;
1461
1462 return LDAP_SUCCESS;
1463 }
1464
1465 /* Convert a structured DN from an X.509 certificate into an LDAPV3 DN.
1466 * x509_name must be raw DER. If func is non-NULL, the
1467 * constructed DN will use numeric OIDs to identify attributeTypes,
1468 * and the func() will be invoked to rewrite the DN with the given
1469 * flags.
1470 *
1471 * Otherwise the DN will use shortNames from a hardcoded table.
1472 */
1473 int
ldap_X509dn2bv(void * x509_name,struct berval * bv,LDAPDN_rewrite_func * func,unsigned flags)1474 ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
1475 unsigned flags )
1476 {
1477 LDAPDN newDN;
1478 LDAPRDN newRDN;
1479 LDAPAVA *newAVA, *baseAVA;
1480 BerElementBuffer berbuf;
1481 BerElement *ber = (BerElement *)&berbuf;
1482 char oids[8192], *oidptr = oids, *oidbuf = NULL;
1483 void *ptrs[2048];
1484 char *dn_end, *rdn_end;
1485 int i, navas, nrdns, rc = LDAP_SUCCESS;
1486 size_t dnsize, oidrem = sizeof(oids), oidsize = 0;
1487 int csize;
1488 ber_tag_t tag;
1489 ber_len_t len;
1490 oid_name *oidname;
1491
1492 struct berval Oid, Val, oid2, *in = x509_name;
1493
1494 assert( bv != NULL );
1495
1496 bv->bv_len = 0;
1497 bv->bv_val = NULL;
1498
1499 navas = 0;
1500 nrdns = 0;
1501
1502 /* A DN is a SEQUENCE of RDNs. An RDN is a SET of AVAs.
1503 * An AVA is a SEQUENCE of attr and value.
1504 * Count the number of AVAs and RDNs
1505 */
1506 ber_init2( ber, in, LBER_USE_DER );
1507 tag = ber_peek_tag( ber, &len );
1508 if ( tag != LBER_SEQUENCE )
1509 return LDAP_DECODING_ERROR;
1510
1511 for ( tag = ber_first_element( ber, &len, &dn_end );
1512 tag == LBER_SET;
1513 tag = ber_next_element( ber, &len, dn_end )) {
1514 nrdns++;
1515 for ( tag = ber_first_element( ber, &len, &rdn_end );
1516 tag == LBER_SEQUENCE;
1517 tag = ber_next_element( ber, &len, rdn_end )) {
1518 if ( rdn_end > dn_end )
1519 return LDAP_DECODING_ERROR;
1520 tag = ber_skip_tag( ber, &len );
1521 ber_skip_data( ber, len );
1522 navas++;
1523 }
1524 }
1525
1526 /* Rewind and prepare to extract */
1527 ber_rewind( ber );
1528 tag = ber_first_element( ber, &len, &dn_end );
1529 if ( tag != LBER_SET )
1530 return LDAP_DECODING_ERROR;
1531
1532 /* Allocate the DN/RDN/AVA stuff as a single block */
1533 dnsize = sizeof(LDAPRDN) * (nrdns+1);
1534 dnsize += sizeof(LDAPAVA *) * (navas+nrdns);
1535 dnsize += sizeof(LDAPAVA) * navas;
1536 if (dnsize > sizeof(ptrs)) {
1537 newDN = (LDAPDN)LDAP_MALLOC( dnsize );
1538 if ( newDN == NULL )
1539 return LDAP_NO_MEMORY;
1540 } else {
1541 newDN = (LDAPDN)(char *)ptrs;
1542 }
1543
1544 newDN[nrdns] = NULL;
1545 newRDN = (LDAPRDN)(newDN + nrdns+1);
1546 newAVA = (LDAPAVA *)(newRDN + navas + nrdns);
1547 baseAVA = newAVA;
1548
1549 for ( i = nrdns - 1; i >= 0; i-- ) {
1550 newDN[i] = newRDN;
1551
1552 for ( tag = ber_first_element( ber, &len, &rdn_end );
1553 tag == LBER_SEQUENCE;
1554 tag = ber_next_element( ber, &len, rdn_end )) {
1555
1556 *newRDN++ = newAVA;
1557 tag = ber_skip_tag( ber, &len );
1558 tag = ber_get_stringbv( ber, &Oid, LBER_BV_NOTERM );
1559 if ( tag != LBER_TAG_OID ) {
1560 rc = LDAP_DECODING_ERROR;
1561 goto nomem;
1562 }
1563
1564 oid2.bv_val = oidptr;
1565 oid2.bv_len = oidrem;
1566 if ( ber_decode_oid( &Oid, &oid2 ) < 0 ) {
1567 rc = LDAP_DECODING_ERROR;
1568 goto nomem;
1569 }
1570 oidname = find_oid( &oid2 );
1571 if ( !oidname ) {
1572 newAVA->la_attr = oid2;
1573 oidptr += oid2.bv_len + 1;
1574 oidrem -= oid2.bv_len + 1;
1575
1576 /* Running out of OID buffer space? */
1577 if (oidrem < 128) {
1578 if ( oidsize == 0 ) {
1579 oidsize = sizeof(oids) * 2;
1580 oidrem = oidsize;
1581 oidbuf = LDAP_MALLOC( oidsize );
1582 if ( oidbuf == NULL ) goto nomem;
1583 oidptr = oidbuf;
1584 } else {
1585 char *old = oidbuf;
1586 oidbuf = LDAP_REALLOC( oidbuf, oidsize*2 );
1587 if ( oidbuf == NULL ) goto nomem;
1588 /* Buffer moved! Fix AVA pointers */
1589 if ( old != oidbuf ) {
1590 LDAPAVA *a;
1591 long dif = oidbuf - old;
1592
1593 for (a=baseAVA; a<=newAVA; a++){
1594 if (a->la_attr.bv_val >= old &&
1595 a->la_attr.bv_val <= (old + oidsize))
1596 a->la_attr.bv_val += dif;
1597 }
1598 }
1599 oidptr = oidbuf + oidsize - oidrem;
1600 oidrem += oidsize;
1601 oidsize *= 2;
1602 }
1603 }
1604 } else {
1605 if ( func ) {
1606 newAVA->la_attr = oidname->oid;
1607 } else {
1608 newAVA->la_attr = oidname->name;
1609 }
1610 }
1611 newAVA->la_private = NULL;
1612 newAVA->la_flags = LDAP_AVA_STRING;
1613 tag = ber_get_stringbv( ber, &Val, LBER_BV_NOTERM );
1614 switch(tag) {
1615 case LBER_TAG_UNIVERSAL:
1616 /* This uses 32-bit ISO 10646-1 */
1617 csize = 4; goto to_utf8;
1618 case LBER_TAG_BMP:
1619 /* This uses 16-bit ISO 10646-1 */
1620 csize = 2; goto to_utf8;
1621 case LBER_TAG_TELETEX:
1622 /* This uses 8-bit, assume ISO 8859-1 */
1623 csize = 1;
1624 to_utf8: rc = ldap_ucs_to_utf8s( &Val, csize, &newAVA->la_value );
1625 newAVA->la_flags |= LDAP_AVA_NONPRINTABLE;
1626 allocd:
1627 newAVA->la_flags |= LDAP_AVA_FREE_VALUE;
1628 if (rc != LDAP_SUCCESS) goto nomem;
1629 break;
1630 case LBER_TAG_UTF8:
1631 newAVA->la_flags |= LDAP_AVA_NONPRINTABLE;
1632 /* This is already in UTF-8 encoding */
1633 case LBER_TAG_IA5:
1634 case LBER_TAG_PRINTABLE:
1635 /* These are always 7-bit strings */
1636 newAVA->la_value = Val;
1637 break;
1638 case LBER_BITSTRING:
1639 /* X.690 bitString value converted to RFC4517 Bit String */
1640 rc = der_to_ldap_BitString( &Val, &newAVA->la_value );
1641 goto allocd;
1642 case LBER_DEFAULT:
1643 /* decode error */
1644 rc = LDAP_DECODING_ERROR;
1645 goto nomem;
1646 default:
1647 /* Not a string type at all */
1648 newAVA->la_flags = 0;
1649 newAVA->la_value = Val;
1650 break;
1651 }
1652 newAVA++;
1653 }
1654 *newRDN++ = NULL;
1655 tag = ber_next_element( ber, &len, dn_end );
1656 }
1657
1658 if ( func ) {
1659 rc = func( newDN, flags, NULL );
1660 if ( rc != LDAP_SUCCESS )
1661 goto nomem;
1662 }
1663
1664 rc = ldap_dn2bv_x( newDN, bv, LDAP_DN_FORMAT_LDAPV3, NULL );
1665
1666 nomem:
1667 for (;baseAVA < newAVA; baseAVA++) {
1668 if (baseAVA->la_flags & LDAP_AVA_FREE_ATTR)
1669 LDAP_FREE( baseAVA->la_attr.bv_val );
1670 if (baseAVA->la_flags & LDAP_AVA_FREE_VALUE)
1671 LDAP_FREE( baseAVA->la_value.bv_val );
1672 }
1673
1674 if ( oidsize != 0 )
1675 LDAP_FREE( oidbuf );
1676 if ( newDN != (LDAPDN)(char *) ptrs )
1677 LDAP_FREE( newDN );
1678 return rc;
1679 }
1680
1681