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[openldap] / libraries / libldap / cyrus.c
1 /* $OpenLDAP$ */
2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3  *
4  * Copyright 1998-2014 The OpenLDAP Foundation.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted only as authorized by the OpenLDAP
9  * Public License.
10  *
11  * A copy of this license is available in the file LICENSE in the
12  * top-level directory of the distribution or, alternatively, at
13  * <http://www.OpenLDAP.org/license.html>.
14  */
15
16 #include "portable.h"
17
18 #include <stdio.h>
19
20 #include <ac/socket.h>
21 #include <ac/stdlib.h>
22 #include <ac/string.h>
23 #include <ac/time.h>
24 #include <ac/errno.h>
25 #include <ac/ctype.h>
26 #include <ac/unistd.h>
27
28 #ifdef HAVE_LIMITS_H
29 #include <limits.h>
30 #endif
31
32 #include "ldap-int.h"
33
34 #ifdef HAVE_CYRUS_SASL
35
36 #ifdef HAVE_LIMITS_H
37 #include <limits.h>
38 #endif
39
40 #ifndef INT_MAX
41 #define INT_MAX 2147483647      /* 32 bit signed max */
42 #endif
43
44 #ifdef HAVE_SASL_SASL_H
45 #include <sasl/sasl.h>
46 #else
47 #include <sasl.h>
48 #endif
49
50 #if SASL_VERSION_MAJOR >= 2
51 #define SASL_CONST const
52 #else
53 #define SASL_CONST
54 #endif
55
56 /*
57 * Various Cyrus SASL related stuff.
58 */
59
60 static const sasl_callback_t client_callbacks[] = {
61 #ifdef SASL_CB_GETREALM
62         { SASL_CB_GETREALM, NULL, NULL },
63 #endif
64         { SASL_CB_USER, NULL, NULL },
65         { SASL_CB_AUTHNAME, NULL, NULL },
66         { SASL_CB_PASS, NULL, NULL },
67         { SASL_CB_ECHOPROMPT, NULL, NULL },
68         { SASL_CB_NOECHOPROMPT, NULL, NULL },
69         { SASL_CB_LIST_END, NULL, NULL }
70 };
71
72 int ldap_int_sasl_init( void )
73 {
74         /* XXX not threadsafe */
75         static int sasl_initialized = 0;
76
77 #ifdef HAVE_SASL_VERSION
78         /* stringify the version number, sasl.h doesn't do it for us */
79 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
80 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
81 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
82                                 SASL_VERSION_STEP)
83         { int rc;
84         sasl_version( NULL, &rc );
85         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
86                 (rc & 0xffff) < SASL_VERSION_STEP) {
87                 char version[sizeof("xxx.xxx.xxxxx")];
88                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
89                         rc & 0xffff );
90
91                 Debug( LDAP_DEBUG_ANY,
92                 "ldap_int_sasl_init: SASL library version mismatch:"
93                 " expected " SASL_VERSION_STRING ","
94                 " got %s\n", version, 0, 0 );
95                 return -1;
96         }
97         }
98 #endif
99         if ( sasl_initialized ) {
100                 return 0;
101         }
102
103 /* SASL 2 takes care of its own memory completely internally */
104 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
105         sasl_set_alloc(
106                 ber_memalloc,
107                 ber_memcalloc,
108                 ber_memrealloc,
109                 ber_memfree );
110 #endif /* CSRIMALLOC */
111
112 #ifdef LDAP_R_COMPILE
113         sasl_set_mutex(
114                 ldap_pvt_sasl_mutex_new,
115                 ldap_pvt_sasl_mutex_lock,
116                 ldap_pvt_sasl_mutex_unlock,    
117                 ldap_pvt_sasl_mutex_dispose );    
118 #endif
119
120         if ( sasl_client_init( NULL ) == SASL_OK ) {
121                 sasl_initialized = 1;
122                 return 0;
123         }
124
125 #if SASL_VERSION_MAJOR < 2
126         /* A no-op to make sure we link with Cyrus 1.5 */
127         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
128 #endif
129         return -1;
130 }
131
132 static void
133 sb_sasl_cyrus_init(
134         struct sb_sasl_generic_data *p,
135         ber_len_t *min_send,
136         ber_len_t *max_send,
137         ber_len_t *max_recv)
138 {
139         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
140         ber_len_t maxbuf;
141
142         sasl_getprop( sasl_context, SASL_MAXOUTBUF,
143                       (SASL_CONST void **)(char *) &maxbuf );
144
145         *min_send = SASL_MIN_BUFF_SIZE;
146         *max_send = maxbuf;
147         *max_recv = SASL_MAX_BUFF_SIZE;
148 }
149
150 static ber_int_t
151 sb_sasl_cyrus_encode(
152         struct sb_sasl_generic_data *p,
153         unsigned char *buf,
154         ber_len_t len,
155         Sockbuf_Buf *dst)
156 {
157         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
158         ber_int_t ret;
159         unsigned tmpsize = dst->buf_size;
160
161         ret = sasl_encode( sasl_context, (char *)buf, len,
162                            (SASL_CONST char **)&dst->buf_base,
163                            &tmpsize );
164
165         dst->buf_size = tmpsize;
166         dst->buf_end = dst->buf_size;
167
168         if ( ret != SASL_OK ) {
169                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
170                                 "sb_sasl_cyrus_encode: failed to encode packet: %s\n",
171                                 sasl_errstring( ret, NULL, NULL ) );
172                 return -1;
173         }
174
175         return 0;
176 }
177
178 static ber_int_t
179 sb_sasl_cyrus_decode(
180         struct sb_sasl_generic_data *p,
181         const Sockbuf_Buf *src,
182         Sockbuf_Buf *dst)
183 {
184         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
185         ber_int_t ret;
186         unsigned tmpsize = dst->buf_size;
187
188         ret = sasl_decode( sasl_context,
189                            src->buf_base, src->buf_end,
190                            (SASL_CONST char **)&dst->buf_base,
191                            (unsigned *)&tmpsize );
192
193
194         dst->buf_size = tmpsize;
195         dst->buf_end = dst->buf_size;
196
197         if ( ret != SASL_OK ) {
198                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
199                                 "sb_sasl_cyrus_decode: failed to decode packet: %s\n",
200                                 sasl_errstring( ret, NULL, NULL ) );
201                 return -1;
202         }
203
204         return 0;
205 }
206
207 static void
208 sb_sasl_cyrus_reset_buf(
209         struct sb_sasl_generic_data *p,
210         Sockbuf_Buf *buf)
211 {
212 #if SASL_VERSION_MAJOR >= 2
213         ber_pvt_sb_buf_init( buf );
214 #else
215         ber_pvt_sb_buf_destroy( buf );
216 #endif
217 }
218
219 static void
220 sb_sasl_cyrus_fini(
221         struct sb_sasl_generic_data *p)
222 {
223 #if SASL_VERSION_MAJOR >= 2
224         /*
225          * SASLv2 encode/decode buffers are managed by
226          * libsasl2. Ensure they are not freed by liblber.
227          */
228         p->buf_in.buf_base = NULL;
229         p->buf_out.buf_base = NULL;
230 #endif
231 }
232
233 static const struct sb_sasl_generic_ops sb_sasl_cyrus_ops = {
234         sb_sasl_cyrus_init,
235         sb_sasl_cyrus_encode,
236         sb_sasl_cyrus_decode,
237         sb_sasl_cyrus_reset_buf,
238         sb_sasl_cyrus_fini
239  };
240
241 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
242 {
243         struct sb_sasl_generic_install install_arg;
244
245         install_arg.ops         = &sb_sasl_cyrus_ops;
246         install_arg.ops_private = ctx_arg;
247
248         return ldap_pvt_sasl_generic_install( sb, &install_arg );
249 }
250
251 void ldap_pvt_sasl_remove( Sockbuf *sb )
252 {
253         ldap_pvt_sasl_generic_remove( sb );
254 }
255
256 static int
257 sasl_err2ldap( int saslerr )
258 {
259         int rc;
260
261         /* map SASL errors to LDAP API errors returned by:
262          *      sasl_client_new()
263          *              SASL_OK, SASL_NOMECH, SASL_NOMEM
264          *      sasl_client_start()
265          *              SASL_OK, SASL_NOMECH, SASL_NOMEM, SASL_INTERACT
266          *      sasl_client_step()
267          *              SASL_OK, SASL_INTERACT, SASL_BADPROT, SASL_BADSERV
268          */
269
270         switch (saslerr) {
271                 case SASL_CONTINUE:
272                         rc = LDAP_MORE_RESULTS_TO_RETURN;
273                         break;
274                 case SASL_INTERACT:
275                         rc = LDAP_LOCAL_ERROR;
276                         break;
277                 case SASL_OK:
278                         rc = LDAP_SUCCESS;
279                         break;
280                 case SASL_NOMEM:
281                         rc = LDAP_NO_MEMORY;
282                         break;
283                 case SASL_NOMECH:
284                         rc = LDAP_AUTH_UNKNOWN;
285                         break;
286                 case SASL_BADPROT:
287                         rc = LDAP_DECODING_ERROR;
288                         break;
289                 case SASL_BADSERV:
290                         rc = LDAP_AUTH_UNKNOWN;
291                         break;
292
293                 /* other codes */
294                 case SASL_BADAUTH:
295                         rc = LDAP_AUTH_UNKNOWN;
296                         break;
297                 case SASL_NOAUTHZ:
298                         rc = LDAP_PARAM_ERROR;
299                         break;
300                 case SASL_FAIL:
301                         rc = LDAP_LOCAL_ERROR;
302                         break;
303                 case SASL_TOOWEAK:
304                 case SASL_ENCRYPT:
305                         rc = LDAP_AUTH_UNKNOWN;
306                         break;
307                 default:
308                         rc = LDAP_LOCAL_ERROR;
309                         break;
310         }
311
312         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
313         return rc;
314 }
315
316 int
317 ldap_int_sasl_open(
318         LDAP *ld, 
319         LDAPConn *lc,
320         const char * host )
321 {
322         int rc;
323         sasl_conn_t *ctx;
324
325         assert( lc->lconn_sasl_authctx == NULL );
326
327         if ( host == NULL ) {
328                 ld->ld_errno = LDAP_LOCAL_ERROR;
329                 return ld->ld_errno;
330         }
331
332         if ( ldap_int_sasl_init() ) {
333                 ld->ld_errno = LDAP_LOCAL_ERROR;
334                 return ld->ld_errno;
335         }
336
337 #if SASL_VERSION_MAJOR >= 2
338         rc = sasl_client_new( "ldap", host, NULL, NULL,
339                 client_callbacks, 0, &ctx );
340 #else
341         rc = sasl_client_new( "ldap", host, client_callbacks,
342                 SASL_SECURITY_LAYER, &ctx );
343 #endif
344
345         if ( rc != SASL_OK ) {
346                 ld->ld_errno = sasl_err2ldap( rc );
347                 return ld->ld_errno;
348         }
349
350         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
351                 host, 0, 0 );
352
353         lc->lconn_sasl_authctx = ctx;
354
355         return LDAP_SUCCESS;
356 }
357
358 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
359 {
360         sasl_conn_t *ctx = lc->lconn_sasl_authctx;
361
362         if( ctx != NULL ) {
363                 sasl_dispose( &ctx );
364                 if ( lc->lconn_sasl_sockctx &&
365                         lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
366                         ctx = lc->lconn_sasl_sockctx;
367                         sasl_dispose( &ctx );
368                 }
369                 lc->lconn_sasl_sockctx = NULL;
370                 lc->lconn_sasl_authctx = NULL;
371         }
372         if( lc->lconn_sasl_cbind ) {
373                 ldap_memfree( lc->lconn_sasl_cbind );
374                 lc->lconn_sasl_cbind = NULL;
375         }
376
377         return LDAP_SUCCESS;
378 }
379
380 int
381 ldap_int_sasl_bind(
382         LDAP                    *ld,
383         const char              *dn,
384         const char              *mechs,
385         LDAPControl             **sctrls,
386         LDAPControl             **cctrls,
387         unsigned                flags,
388         LDAP_SASL_INTERACT_PROC *interact,
389         void                    *defaults,
390         LDAPMessage             *result,
391         const char              **rmech,
392         int                             *msgid )
393 {
394         const char              *mech;
395         sasl_ssf_t              *ssf;
396         sasl_conn_t             *ctx;
397         sasl_interact_t *prompts = NULL;
398         struct berval   ccred = BER_BVNULL;
399         int saslrc, rc;
400         unsigned credlen;
401
402         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
403                 mechs ? mechs : "<null>", 0, 0 );
404
405         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
406         if (ld->ld_version < LDAP_VERSION3) {
407                 ld->ld_errno = LDAP_NOT_SUPPORTED;
408                 return ld->ld_errno;
409         }
410
411         /* Starting a Bind */
412         if ( !result ) {
413                 const char *pmech = NULL;
414                 sasl_conn_t     *oldctx;
415                 ber_socket_t            sd;
416                 void    *ssl;
417
418                 rc = 0;
419                 LDAP_MUTEX_LOCK( &ld->ld_conn_mutex );
420                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
421
422                 if ( sd == AC_SOCKET_INVALID || !ld->ld_defconn ) {
423                         /* not connected yet */
424
425                         rc = ldap_open_defconn( ld );
426
427                         if ( rc == 0 ) {
428                                 ber_sockbuf_ctrl( ld->ld_defconn->lconn_sb,
429                                         LBER_SB_OPT_GET_FD, &sd );
430
431                                 if( sd == AC_SOCKET_INVALID ) {
432                                         ld->ld_errno = LDAP_LOCAL_ERROR;
433                                         rc = ld->ld_errno;
434                                 }
435                         }
436                 }
437                 if ( rc == 0 && ld->ld_defconn &&
438                         ld->ld_defconn->lconn_status == LDAP_CONNST_CONNECTING ) {
439                         rc = ldap_int_check_async_open( ld, sd );
440                 }
441                 LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
442                 if( rc != 0 ) return ld->ld_errno;
443
444                 oldctx = ld->ld_defconn->lconn_sasl_authctx;
445
446                 /* If we already have an authentication context, clear it out */
447                 if( oldctx ) {
448                         if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
449                                 sasl_dispose( &oldctx );
450                         }
451                         ld->ld_defconn->lconn_sasl_authctx = NULL;
452                 }
453
454                 {
455                         char *saslhost;
456                         int nocanon = (int)LDAP_BOOL_GET( &ld->ld_options,
457                                 LDAP_BOOL_SASL_NOCANON );
458
459                         /* If we don't need to canonicalize just use the host
460                          * from the LDAP URI.
461                          */
462                         if ( nocanon )
463                                 saslhost = ld->ld_defconn->lconn_server->lud_host;
464                         else 
465                                 saslhost = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
466                                 "localhost" );
467                         rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
468                         if ( !nocanon )
469                                 LDAP_FREE( saslhost );
470                 }
471
472                 if ( rc != LDAP_SUCCESS ) return rc;
473
474                 ctx = ld->ld_defconn->lconn_sasl_authctx;
475
476 #ifdef HAVE_TLS
477                 /* Check for TLS */
478                 ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
479                 if ( ssl ) {
480                         struct berval authid = BER_BVNULL;
481                         ber_len_t fac;
482
483                         fac = ldap_pvt_tls_get_strength( ssl );
484                         /* failure is OK, we just can't use SASL EXTERNAL */
485                         (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
486
487                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
488                         LDAP_FREE( authid.bv_val );
489 #ifdef SASL_CHANNEL_BINDING     /* 2.1.25+ */
490                         {
491                                 char cbinding[64];
492                                 struct berval cbv = { sizeof(cbinding), cbinding };
493                                 if ( ldap_pvt_tls_get_unique( ssl, &cbv, 0 )) {
494                                         sasl_channel_binding_t *cb = ldap_memalloc( sizeof(*cb) +
495                                                 cbv.bv_len);
496                                         cb->name = "ldap";
497                                         cb->critical = 0;
498                                         cb->data = (char *)(cb+1);
499                                         cb->len = cbv.bv_len;
500                                         memcpy( cb->data, cbv.bv_val, cbv.bv_len );
501                                         sasl_setprop( ld->ld_defconn->lconn_sasl_authctx,
502                                                 SASL_CHANNEL_BINDING, cb );
503                                         ld->ld_defconn->lconn_sasl_cbind = cb;
504                                 }
505                         }
506 #endif
507                 }
508 #endif
509
510 #if !defined(_WIN32)
511                 /* Check for local */
512                 if ( ldap_pvt_url_scheme2proto(
513                         ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
514                 {
515                         char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
516                                 "cn=peercred,cn=external,cn=auth")];
517                         sprintf( authid, "gidNumber=%u+uidNumber=%u,"
518                                 "cn=peercred,cn=external,cn=auth",
519                                 getegid(), geteuid() );
520                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
521                                 LDAP_PVT_SASL_LOCAL_SSF );
522                 }
523 #endif
524
525                 /* (re)set security properties */
526                 sasl_setprop( ctx, SASL_SEC_PROPS,
527                         &ld->ld_options.ldo_sasl_secprops );
528
529                 mech = NULL;
530
531                 do {
532                         saslrc = sasl_client_start( ctx,
533                                 mechs,
534 #if SASL_VERSION_MAJOR < 2
535                                 NULL,
536 #endif
537                                 &prompts,
538                                 (SASL_CONST char **)&ccred.bv_val,
539                                 &credlen,
540                                 &mech );
541
542                         if( pmech == NULL && mech != NULL ) {
543                                 pmech = mech;
544                                 *rmech = mech;
545
546                                 if( flags != LDAP_SASL_QUIET ) {
547                                         fprintf(stderr,
548                                                 "SASL/%s authentication started\n",
549                                                 pmech );
550                                 }
551                         }
552
553                         if( saslrc == SASL_INTERACT ) {
554                                 int res;
555                                 if( !interact ) break;
556                                 res = (interact)( ld, flags, defaults, prompts );
557
558                                 if( res != LDAP_SUCCESS ) break;
559                         }
560                 } while ( saslrc == SASL_INTERACT );
561                 rc = LDAP_SASL_BIND_IN_PROGRESS;
562
563         } else {
564                 /* continuing an in-progress Bind */
565                 struct berval *scred = NULL;
566
567                 ctx = ld->ld_defconn->lconn_sasl_authctx;
568
569                 rc = ldap_parse_sasl_bind_result( ld, result, &scred, 0 );
570                 if ( rc != LDAP_SUCCESS ) {
571                         if ( scred )
572                                 ber_bvfree( scred );
573                         goto done;
574                 }
575
576                 rc = ldap_result2error( ld, result, 0 );
577                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
578                         if( scred ) {
579                                 /* and server provided us with data? */
580                                 Debug( LDAP_DEBUG_TRACE,
581                                         "ldap_int_sasl_bind: rc=%d len=%ld\n",
582                                         rc, scred ? (long) scred->bv_len : -1L, 0 );
583                                 ber_bvfree( scred );
584                                 scred = NULL;
585                         }
586                         goto done;
587                 }
588
589                 mech = *rmech;
590                 if ( rc == LDAP_SUCCESS && mech == NULL ) {
591                         if ( scred )
592                                 ber_bvfree( scred );
593                         goto success;
594                 }
595
596                 do {
597                         if( ! scred ) {
598                                 /* no data! */
599                                 Debug( LDAP_DEBUG_TRACE,
600                                         "ldap_int_sasl_bind: no data in step!\n",
601                                         0, 0, 0 );
602                         }
603
604                         saslrc = sasl_client_step( ctx,
605                                 (scred == NULL) ? NULL : scred->bv_val,
606                                 (scred == NULL) ? 0 : scred->bv_len,
607                                 &prompts,
608                                 (SASL_CONST char **)&ccred.bv_val,
609                                 &credlen );
610
611                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
612                                 saslrc, 0, 0 );
613
614                         if( saslrc == SASL_INTERACT ) {
615                                 int res;
616                                 if( !interact ) break;
617                                 res = (interact)( ld, flags, defaults, prompts );
618                                 if( res != LDAP_SUCCESS ) break;
619                         }
620                 } while ( saslrc == SASL_INTERACT );
621
622                 ber_bvfree( scred );
623         }
624
625         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
626                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
627 #if SASL_VERSION_MAJOR >= 2
628                 if ( ld->ld_error ) {
629                         LDAP_FREE( ld->ld_error );
630                 }
631                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
632 #endif
633                 goto done;
634         }
635
636         if ( saslrc == SASL_OK )
637                 *rmech = NULL;
638
639         ccred.bv_len = credlen;
640
641         if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
642                 rc = ldap_sasl_bind( ld, dn, mech, &ccred, sctrls, cctrls, msgid );
643
644                 if ( ccred.bv_val != NULL ) {
645 #if SASL_VERSION_MAJOR < 2
646                         LDAP_FREE( ccred.bv_val );
647 #endif
648                         ccred.bv_val = NULL;
649                 }
650                 if ( rc == LDAP_SUCCESS )
651                         rc = LDAP_SASL_BIND_IN_PROGRESS;
652                 goto done;
653         }
654
655 success:
656         /* Conversation was completed successfully by now */
657         if( flags != LDAP_SASL_QUIET ) {
658                 char *data;
659                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
660                         (SASL_CONST void **)(char *) &data );
661                 if( saslrc == SASL_OK && data && *data ) {
662                         fprintf( stderr, "SASL username: %s\n", data );
663                 }
664
665 #if SASL_VERSION_MAJOR < 2
666                 saslrc = sasl_getprop( ctx, SASL_REALM,
667                         (SASL_CONST void **) &data );
668                 if( saslrc == SASL_OK && data && *data ) {
669                         fprintf( stderr, "SASL realm: %s\n", data );
670                 }
671 #endif
672         }
673
674         ssf = NULL;
675         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
676         if( saslrc == SASL_OK ) {
677                 if( flags != LDAP_SASL_QUIET ) {
678                         fprintf( stderr, "SASL SSF: %lu\n",
679                                 (unsigned long) *ssf );
680                 }
681
682                 if( ssf && *ssf ) {
683                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
684                                 sasl_conn_t     *oldctx = ld->ld_defconn->lconn_sasl_sockctx;
685                                 sasl_dispose( &oldctx );
686                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
687                         }
688                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
689                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
690
691                         if( flags != LDAP_SASL_QUIET ) {
692                                 fprintf( stderr, "SASL data security layer installed.\n" );
693                         }
694                 }
695         }
696         ld->ld_defconn->lconn_sasl_authctx = ctx;
697
698 done:
699         return rc;
700 }
701
702 int
703 ldap_int_sasl_external(
704         LDAP *ld,
705         LDAPConn *conn,
706         const char * authid,
707         ber_len_t ssf )
708 {
709         int sc;
710         sasl_conn_t *ctx;
711 #if SASL_VERSION_MAJOR < 2
712         sasl_external_properties_t extprops;
713 #else
714         sasl_ssf_t sasl_ssf = ssf;
715 #endif
716
717         ctx = conn->lconn_sasl_authctx;
718
719         if ( ctx == NULL ) {
720                 return LDAP_LOCAL_ERROR;
721         }
722    
723 #if SASL_VERSION_MAJOR >= 2
724         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
725         if ( sc == SASL_OK )
726                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
727 #else
728         memset( &extprops, '\0', sizeof(extprops) );
729         extprops.ssf = ssf;
730         extprops.auth_id = (char *) authid;
731
732         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
733                 (void *) &extprops );
734 #endif
735
736         if ( sc != SASL_OK ) {
737                 return LDAP_LOCAL_ERROR;
738         }
739
740         return LDAP_SUCCESS;
741 }
742
743
744 #define GOT_MINSSF      1
745 #define GOT_MAXSSF      2
746 #define GOT_MAXBUF      4
747
748 static struct {
749         struct berval key;
750         int sflag;
751         int ival;
752         int idef;
753 } sprops[] = {
754         { BER_BVC("none"), 0, 0, 0 },
755         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
756         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
757         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
758         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
759         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
760         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
761         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
762         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
763         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
764         { BER_BVNULL, 0, 0, 0 }
765 };
766
767 void ldap_pvt_sasl_secprops_unparse(
768         sasl_security_properties_t *secprops,
769         struct berval *out )
770 {
771         int i, l = 0;
772         int comma;
773         char *ptr;
774
775         if ( secprops == NULL || out == NULL ) {
776                 return;
777         }
778
779         comma = 0;
780         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
781                 if ( sprops[i].ival ) {
782                         int v = 0;
783
784                         switch( sprops[i].ival ) {
785                         case GOT_MINSSF: v = secprops->min_ssf; break;
786                         case GOT_MAXSSF: v = secprops->max_ssf; break;
787                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
788                         }
789                         /* It is the default, ignore it */
790                         if ( v == sprops[i].idef ) continue;
791
792                         l += sprops[i].key.bv_len + 24;
793                 } else if ( sprops[i].sflag ) {
794                         if ( sprops[i].sflag & secprops->security_flags ) {
795                                 l += sprops[i].key.bv_len;
796                         }
797                 } else if ( secprops->security_flags == 0 ) {
798                         l += sprops[i].key.bv_len;
799                 }
800                 if ( comma ) l++;
801                 comma = 1;
802         }
803         l++;
804
805         out->bv_val = LDAP_MALLOC( l );
806         if ( out->bv_val == NULL ) {
807                 out->bv_len = 0;
808                 return;
809         }
810
811         ptr = out->bv_val;
812         comma = 0;
813         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
814                 if ( sprops[i].ival ) {
815                         int v = 0;
816
817                         switch( sprops[i].ival ) {
818                         case GOT_MINSSF: v = secprops->min_ssf; break;
819                         case GOT_MAXSSF: v = secprops->max_ssf; break;
820                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
821                         }
822                         /* It is the default, ignore it */
823                         if ( v == sprops[i].idef ) continue;
824
825                         if ( comma ) *ptr++ = ',';
826                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
827                         comma = 1;
828                 } else if ( sprops[i].sflag ) {
829                         if ( sprops[i].sflag & secprops->security_flags ) {
830                                 if ( comma ) *ptr++ = ',';
831                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
832                                 comma = 1;
833                         }
834                 } else if ( secprops->security_flags == 0 ) {
835                         if ( comma ) *ptr++ = ',';
836                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
837                         comma = 1;
838                 }
839         }
840         out->bv_len = ptr - out->bv_val;
841 }
842
843 int ldap_pvt_sasl_secprops(
844         const char *in,
845         sasl_security_properties_t *secprops )
846 {
847         unsigned i, j, l;
848         char **props;
849         unsigned sflags = 0;
850         int got_sflags = 0;
851         sasl_ssf_t max_ssf = 0;
852         int got_max_ssf = 0;
853         sasl_ssf_t min_ssf = 0;
854         int got_min_ssf = 0;
855         unsigned maxbufsize = 0;
856         int got_maxbufsize = 0;
857
858         if( secprops == NULL ) {
859                 return LDAP_PARAM_ERROR;
860         }
861         props = ldap_str2charray( in, "," );
862         if( props == NULL ) {
863                 return LDAP_PARAM_ERROR;
864         }
865
866         for( i=0; props[i]; i++ ) {
867                 l = strlen( props[i] );
868                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
869                         if ( l < sprops[j].key.bv_len ) continue;
870                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
871                                 sprops[j].key.bv_len )) continue;
872                         if ( sprops[j].ival ) {
873                                 unsigned v;
874                                 char *next = NULL;
875                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
876                                         continue;
877                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
878                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
879                                 switch( sprops[j].ival ) {
880                                 case GOT_MINSSF:
881                                         min_ssf = v; got_min_ssf++; break;
882                                 case GOT_MAXSSF:
883                                         max_ssf = v; got_max_ssf++; break;
884                                 case GOT_MAXBUF:
885                                         maxbufsize = v; got_maxbufsize++; break;
886                                 }
887                         } else {
888                                 if ( props[i][sprops[j].key.bv_len] ) continue;
889                                 if ( sprops[j].sflag )
890                                         sflags |= sprops[j].sflag;
891                                 else
892                                         sflags = 0;
893                                 got_sflags++;
894                         }
895                         break;
896                 }
897                 if ( BER_BVISNULL( &sprops[j].key )) {
898                         ldap_charray_free( props );
899                         return LDAP_NOT_SUPPORTED;
900                 }
901         }
902
903         if(got_sflags) {
904                 secprops->security_flags = sflags;
905         }
906         if(got_min_ssf) {
907                 secprops->min_ssf = min_ssf;
908         }
909         if(got_max_ssf) {
910                 secprops->max_ssf = max_ssf;
911         }
912         if(got_maxbufsize) {
913                 secprops->maxbufsize = maxbufsize;
914         }
915
916         ldap_charray_free( props );
917         return LDAP_SUCCESS;
918 }
919
920 int
921 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
922 {
923         int rc;
924
925         switch( option ) {
926         case LDAP_OPT_X_SASL_SECPROPS:
927                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
928                 if( rc == LDAP_SUCCESS ) return 0;
929         }
930
931         return -1;
932 }
933
934 int
935 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
936 {
937         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
938                 if ( ldap_int_sasl_init() )
939                         return -1;
940                 *(char ***)arg = (char **)sasl_global_listmech();
941                 return 0;
942         }
943
944         if ( ld == NULL )
945                 return -1;
946
947         switch ( option ) {
948                 case LDAP_OPT_X_SASL_MECH: {
949                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
950                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
951                 } break;
952                 case LDAP_OPT_X_SASL_REALM: {
953                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
954                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
955                 } break;
956                 case LDAP_OPT_X_SASL_AUTHCID: {
957                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
958                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
959                 } break;
960                 case LDAP_OPT_X_SASL_AUTHZID: {
961                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
962                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
963                 } break;
964
965                 case LDAP_OPT_X_SASL_SSF: {
966                         int sc;
967                         sasl_ssf_t      *ssf;
968                         sasl_conn_t *ctx;
969
970                         if( ld->ld_defconn == NULL ) {
971                                 return -1;
972                         }
973
974                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
975
976                         if ( ctx == NULL ) {
977                                 return -1;
978                         }
979
980                         sc = sasl_getprop( ctx, SASL_SSF,
981                                 (SASL_CONST void **)(char *) &ssf );
982
983                         if ( sc != SASL_OK ) {
984                                 return -1;
985                         }
986
987                         *(ber_len_t *)arg = *ssf;
988                 } break;
989
990                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
991                         /* this option is write only */
992                         return -1;
993
994                 case LDAP_OPT_X_SASL_SSF_MIN:
995                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
996                         break;
997                 case LDAP_OPT_X_SASL_SSF_MAX:
998                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
999                         break;
1000                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1001                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1002                         break;
1003                 case LDAP_OPT_X_SASL_NOCANON:
1004                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1005                         break;
1006
1007                 case LDAP_OPT_X_SASL_USERNAME: {
1008                         int sc;
1009                         char *username;
1010                         sasl_conn_t *ctx;
1011
1012                         if( ld->ld_defconn == NULL ) {
1013                                 return -1;
1014                         }
1015
1016                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1017
1018                         if ( ctx == NULL ) {
1019                                 return -1;
1020                         }
1021
1022                         sc = sasl_getprop( ctx, SASL_USERNAME,
1023                                 (SASL_CONST void **)(char **) &username );
1024
1025                         if ( sc != SASL_OK ) {
1026                                 return -1;
1027                         }
1028
1029                         *(char **)arg = username ? LDAP_STRDUP( username ) : NULL;
1030                 } break;
1031
1032                 case LDAP_OPT_X_SASL_SECPROPS:
1033                         /* this option is write only */
1034                         return -1;
1035
1036 #ifdef SASL_GSS_CREDS
1037                 case LDAP_OPT_X_SASL_GSS_CREDS: {
1038                         sasl_conn_t *ctx;
1039                         int sc;
1040
1041                         if ( ld->ld_defconn == NULL )
1042                                 return -1;
1043
1044                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1045                         if ( ctx == NULL )
1046                                 return -1;
1047
1048                         sc = sasl_getprop( ctx, SASL_GSS_CREDS, arg );
1049                         if ( sc != SASL_OK )
1050                                 return -1;
1051                         }
1052                         break;
1053 #endif
1054
1055                 default:
1056                         return -1;
1057         }
1058         return 0;
1059 }
1060
1061 int
1062 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1063 {
1064         if ( ld == NULL )
1065                 return -1;
1066
1067         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1068                 return -1;
1069
1070         switch ( option ) {
1071         case LDAP_OPT_X_SASL_SSF:
1072         case LDAP_OPT_X_SASL_USERNAME:
1073                 /* This option is read-only */
1074                 return -1;
1075
1076         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1077                 int sc;
1078 #if SASL_VERSION_MAJOR < 2
1079                 sasl_external_properties_t extprops;
1080 #else
1081                 sasl_ssf_t sasl_ssf;
1082 #endif
1083                 sasl_conn_t *ctx;
1084
1085                 if( ld->ld_defconn == NULL ) {
1086                         return -1;
1087                 }
1088
1089                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1090
1091                 if ( ctx == NULL ) {
1092                         return -1;
1093                 }
1094
1095 #if SASL_VERSION_MAJOR >= 2
1096                 sasl_ssf = * (ber_len_t *)arg;
1097                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1098 #else
1099                 memset(&extprops, 0L, sizeof(extprops));
1100
1101                 extprops.ssf = * (ber_len_t *) arg;
1102
1103                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1104                         (void *) &extprops );
1105 #endif
1106
1107                 if ( sc != SASL_OK ) {
1108                         return -1;
1109                 }
1110                 } break;
1111
1112         case LDAP_OPT_X_SASL_SSF_MIN:
1113                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1114                 break;
1115         case LDAP_OPT_X_SASL_SSF_MAX:
1116                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1117                 break;
1118         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1119                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1120                 break;
1121         case LDAP_OPT_X_SASL_NOCANON:
1122                 if ( arg == LDAP_OPT_OFF ) {
1123                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1124                 } else {
1125                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1126                 }
1127                 break;
1128
1129         case LDAP_OPT_X_SASL_SECPROPS: {
1130                 int sc;
1131                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1132                         &ld->ld_options.ldo_sasl_secprops );
1133
1134                 return sc == LDAP_SUCCESS ? 0 : -1;
1135                 }
1136
1137 #ifdef SASL_GSS_CREDS
1138         case LDAP_OPT_X_SASL_GSS_CREDS: {
1139                 sasl_conn_t *ctx;
1140                 int sc;
1141
1142                 if ( ld->ld_defconn == NULL )
1143                         return -1;
1144
1145                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1146                 if ( ctx == NULL )
1147                         return -1;
1148
1149                 sc = sasl_setprop( ctx, SASL_GSS_CREDS, arg );
1150                 if ( sc != SASL_OK )
1151                         return -1;
1152                 }
1153                 break;
1154 #endif
1155
1156         default:
1157                 return -1;
1158         }
1159         return 0;
1160 }
1161
1162 #ifdef LDAP_R_COMPILE
1163 #define LDAP_DEBUG_R_SASL
1164 void *ldap_pvt_sasl_mutex_new(void)
1165 {
1166         ldap_pvt_thread_mutex_t *mutex;
1167
1168         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1169                 sizeof(ldap_pvt_thread_mutex_t) );
1170
1171         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1172                 return mutex;
1173         }
1174 #ifndef LDAP_DEBUG_R_SASL
1175         assert( 0 );
1176 #endif /* !LDAP_DEBUG_R_SASL */
1177         return NULL;
1178 }
1179
1180 int ldap_pvt_sasl_mutex_lock(void *mutex)
1181 {
1182 #ifdef LDAP_DEBUG_R_SASL
1183         if ( mutex == NULL ) {
1184                 return SASL_OK;
1185         }
1186 #else /* !LDAP_DEBUG_R_SASL */
1187         assert( mutex != NULL );
1188 #endif /* !LDAP_DEBUG_R_SASL */
1189         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1190                 ? SASL_FAIL : SASL_OK;
1191 }
1192
1193 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1194 {
1195 #ifdef LDAP_DEBUG_R_SASL
1196         if ( mutex == NULL ) {
1197                 return SASL_OK;
1198         }
1199 #else /* !LDAP_DEBUG_R_SASL */
1200         assert( mutex != NULL );
1201 #endif /* !LDAP_DEBUG_R_SASL */
1202         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1203                 ? SASL_FAIL : SASL_OK;
1204 }
1205
1206 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1207 {
1208 #ifdef LDAP_DEBUG_R_SASL
1209         if ( mutex == NULL ) {
1210                 return;
1211         }
1212 #else /* !LDAP_DEBUG_R_SASL */
1213         assert( mutex != NULL );
1214 #endif /* !LDAP_DEBUG_R_SASL */
1215         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1216         LDAP_FREE( mutex );
1217 }
1218 #endif
1219
1220 #else
1221 int ldap_int_sasl_init( void )
1222 { return LDAP_SUCCESS; }
1223
1224 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1225 { return LDAP_SUCCESS; }
1226
1227 int
1228 ldap_int_sasl_bind(
1229         LDAP                    *ld,
1230         const char              *dn,
1231         const char              *mechs,
1232         LDAPControl             **sctrls,
1233         LDAPControl             **cctrls,
1234         unsigned                flags,
1235         LDAP_SASL_INTERACT_PROC *interact,
1236         void                    *defaults,
1237         LDAPMessage             *result,
1238         const char              **rmech,
1239         int                             *msgid )
1240 { return LDAP_NOT_SUPPORTED; }
1241
1242 int
1243 ldap_int_sasl_external(
1244         LDAP *ld,
1245         LDAPConn *conn,
1246         const char * authid,
1247         ber_len_t ssf )
1248 { return LDAP_SUCCESS; }
1249
1250 #endif /* HAVE_CYRUS_SASL */