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[netbsd-mini2440.git] / external / bsd / openldap / dist / servers / slapd / sasl.c
blob48ad8c51afc465869439d624b71ef2162ccadd7a
1 /* $OpenLDAP: pkg/ldap/servers/slapd/sasl.c,v 1.239.2.12 2008/02/12 00:54:34 quanah Exp $ */
2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
3 *
4 * Copyright 1998-2008 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 #ifdef HAVE_LIMITS_H
20 #include <limits.h>
21 #endif
22
23 #include <ac/stdlib.h>
24 #include <ac/string.h>
25
26 #include <lber.h>
27 #include <ldap_log.h>
28
29 #include "slap.h"
30
31 #ifdef ENABLE_REWRITE
32 #include <rewrite.h>
33 #endif
34
35 #ifdef HAVE_CYRUS_SASL
36 # ifdef HAVE_SASL_SASL_H
37 # include <sasl/sasl.h>
38 # include <sasl/saslplug.h>
39 # else
40 # include <sasl.h>
41 # include <saslplug.h>
42 # endif
43
44 # define SASL_CONST const
45
46 #define SASL_VERSION_FULL ((SASL_VERSION_MAJOR << 16) |\
47 (SASL_VERSION_MINOR << 8) | SASL_VERSION_STEP)
48
49 static sasl_security_properties_t sasl_secprops;
50 #elif defined( SLAP_BUILTIN_SASL )
51 /*
52 * built-in SASL implementation
53 * only supports EXTERNAL
54 */
55 typedef struct sasl_ctx {
56 slap_ssf_t sc_external_ssf;
57 struct berval sc_external_id;
58 } SASL_CTX;
59
60 #endif
61
62 #include <lutil.h>
63
64 static struct berval ext_bv = BER_BVC( "EXTERNAL" );
65
66 #ifdef HAVE_CYRUS_SASL
67
68 int
69 slap_sasl_log(
70 void *context,
71 int priority,
72 const char *message)
73 {
74 Connection *conn = context;
75 int level;
76 const char * label;
77
78 if ( message == NULL ) {
79 return SASL_BADPARAM;
80 }
81
82 switch (priority) {
83 case SASL_LOG_NONE:
84 level = LDAP_DEBUG_NONE;
85 label = "None";
86 break;
87 case SASL_LOG_ERR:
88 level = LDAP_DEBUG_ANY;
89 label = "Error";
90 break;
91 case SASL_LOG_FAIL:
92 level = LDAP_DEBUG_ANY;
93 label = "Failure";
94 break;
95 case SASL_LOG_WARN:
96 level = LDAP_DEBUG_TRACE;
97 label = "Warning";
98 break;
99 case SASL_LOG_NOTE:
100 level = LDAP_DEBUG_TRACE;
101 label = "Notice";
102 break;
103 case SASL_LOG_DEBUG:
104 level = LDAP_DEBUG_TRACE;
105 label = "Debug";
106 break;
107 case SASL_LOG_TRACE:
108 level = LDAP_DEBUG_TRACE;
109 label = "Trace";
110 break;
111 case SASL_LOG_PASS:
112 level = LDAP_DEBUG_TRACE;
113 label = "Password Trace";
114 break;
115 default:
116 return SASL_BADPARAM;
117 }
118
119 Debug( level, "SASL [conn=%ld] %s: %s\n",
120 conn ? conn->c_connid: -1,
121 label, message );
122
123
124 return SASL_OK;
125 }
126
127 static const char *slap_propnames[] = {
128 "*slapConn", "*slapAuthcDNlen", "*slapAuthcDN",
129 "*slapAuthzDNlen", "*slapAuthzDN", NULL };
130
131 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
132 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
133
134 #define SLAP_SASL_PROP_CONN 0
135 #define SLAP_SASL_PROP_AUTHCLEN 1
136 #define SLAP_SASL_PROP_AUTHC 2
137 #define SLAP_SASL_PROP_AUTHZLEN 3
138 #define SLAP_SASL_PROP_AUTHZ 4
139 #define SLAP_SASL_PROP_COUNT 5 /* Number of properties we used */
140
141 typedef struct lookup_info {
142 int flags;
143 const struct propval *list;
144 sasl_server_params_t *sparams;
145 } lookup_info;
146
147 static slap_response sasl_ap_lookup;
148
149 static struct berval sc_cleartext = BER_BVC("{CLEARTEXT}");
150
151 static int
152 sasl_ap_lookup( Operation *op, SlapReply *rs )
153 {
154 BerVarray bv;
155 AttributeDescription *ad;
156 Attribute *a;
157 const char *text;
158 int rc, i;
159 lookup_info *sl = (lookup_info *)op->o_callback->sc_private;
160
161 if (rs->sr_type != REP_SEARCH) return 0;
162
163 for( i = 0; sl->list[i].name; i++ ) {
164 const char *name = sl->list[i].name;
165
166 if ( name[0] == '*' ) {
167 if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
168 /* Skip our private properties */
169 if ( !strcmp( name, slap_propnames[0] )) {
170 i += SLAP_SASL_PROP_COUNT - 1;
171 continue;
172 }
173 name++;
174 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
175 continue;
176
177 if ( sl->list[i].values ) {
178 if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
179 }
180 ad = NULL;
181 rc = slap_str2ad( name, &ad, &text );
182 if ( rc != LDAP_SUCCESS ) {
183 Debug( LDAP_DEBUG_TRACE,
184 "slap_ap_lookup: str2ad(%s): %s\n", name, text, 0 );
185 continue;
186 }
187
188 /* If it's the rootdn and a rootpw was present, we already set
189 * it so don't override it here.
190 */
191 if ( ad == slap_schema.si_ad_userPassword && sl->list[i].values &&
192 be_isroot_dn( op->o_bd, &op->o_req_ndn ))
193 continue;
194
195 a = attr_find( rs->sr_entry->e_attrs, ad );
196 if ( !a ) continue;
197 if ( ! access_allowed( op, rs->sr_entry, ad, NULL, ACL_AUTH, NULL ) ) {
198 continue;
199 }
200 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) ) {
201 sl->sparams->utils->prop_erase( sl->sparams->propctx,
202 sl->list[i].name );
203 }
204 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
205 /* ITS#3846 don't give hashed passwords to SASL */
206 if ( ad == slap_schema.si_ad_userPassword &&
207 bv->bv_val[0] == '{' /*}*/ )
208 {
209 if ( lutil_passwd_scheme( bv->bv_val ) ) {
210 /* If it's not a recognized scheme, just assume it's
211 * a cleartext password that happened to include brackets.
212 *
213 * If it's a recognized scheme, skip this value, unless the
214 * scheme is {CLEARTEXT}. In that case, skip over the
215 * scheme name and use the remainder. If there is nothing
216 * past the scheme name, skip this value.
217 */
218 #ifdef SLAPD_CLEARTEXT
219 if ( !strncasecmp( bv->bv_val, sc_cleartext.bv_val,
220 sc_cleartext.bv_len )) {
221 struct berval cbv;
222 cbv.bv_len = bv->bv_len - sc_cleartext.bv_len;
223 if ( cbv.bv_len > 0 ) {
224 cbv.bv_val = bv->bv_val + sc_cleartext.bv_len;
225 sl->sparams->utils->prop_set( sl->sparams->propctx,
226 sl->list[i].name, cbv.bv_val, cbv.bv_len );
227 }
228 }
229 #endif
230 continue;
231 }
232 }
233 sl->sparams->utils->prop_set( sl->sparams->propctx,
234 sl->list[i].name, bv->bv_val, bv->bv_len );
235 }
236 }
237 return LDAP_SUCCESS;
238 }
239
240 static void
241 slap_auxprop_lookup(
242 void *glob_context,
243 sasl_server_params_t *sparams,
244 unsigned flags,
245 const char *user,
246 unsigned ulen)
247 {
248 Operation op = {0};
249 int i, doit = 0;
250 Connection *conn = NULL;
251 lookup_info sl;
252
253 sl.list = sparams->utils->prop_get( sparams->propctx );
254 sl.sparams = sparams;
255 sl.flags = flags;
256
257 /* Find our DN and conn first */
258 for( i = 0; sl.list[i].name; i++ ) {
259 if ( sl.list[i].name[0] == '*' ) {
260 if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
261 if ( sl.list[i].values && sl.list[i].values[0] )
262 AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
263 continue;
264 }
265 if ( flags & SASL_AUXPROP_AUTHZID ) {
266 if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZLEN] )) {
267 if ( sl.list[i].values && sl.list[i].values[0] )
268 AC_MEMCPY( &op.o_req_ndn.bv_len, sl.list[i].values[0],
269 sizeof( op.o_req_ndn.bv_len ) );
270 } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZ] )) {
271 if ( sl.list[i].values )
272 op.o_req_ndn.bv_val = (char *)sl.list[i].values[0];
273 break;
274 }
275 }
276
277 if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
278 if ( sl.list[i].values && sl.list[i].values[0] )
279 AC_MEMCPY( &op.o_req_ndn.bv_len, sl.list[i].values[0],
280 sizeof( op.o_req_ndn.bv_len ) );
281 } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
282 if ( sl.list[i].values ) {
283 op.o_req_ndn.bv_val = (char *)sl.list[i].values[0];
284 if ( !(flags & SASL_AUXPROP_AUTHZID) )
285 break;
286 }
287 }
288 }
289 }
290
291 /* Now see what else needs to be fetched */
292 for( i = 0; sl.list[i].name; i++ ) {
293 const char *name = sl.list[i].name;
294
295 if ( name[0] == '*' ) {
296 if ( flags & SASL_AUXPROP_AUTHZID ) continue;
297 /* Skip our private properties */
298 if ( !strcmp( name, slap_propnames[0] )) {
299 i += SLAP_SASL_PROP_COUNT - 1;
300 continue;
301 }
302 name++;
303 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
304 continue;
305
306 if ( sl.list[i].values ) {
307 if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
308 }
309 doit = 1;
310 break;
311 }
312
313 if (doit) {
314 slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
315
316 cb.sc_private = &sl;
317
318 op.o_bd = select_backend( &op.o_req_ndn, 1 );
319
320 if ( op.o_bd ) {
321 /* For rootdn, see if we can use the rootpw */
322 if ( be_isroot_dn( op.o_bd, &op.o_req_ndn ) &&
323 !BER_BVISEMPTY( &op.o_bd->be_rootpw )) {
324 struct berval cbv = BER_BVNULL;
325
326 /* If there's a recognized scheme, see if it's CLEARTEXT */
327 if ( lutil_passwd_scheme( op.o_bd->be_rootpw.bv_val )) {
328 if ( !strncasecmp( op.o_bd->be_rootpw.bv_val,
329 sc_cleartext.bv_val, sc_cleartext.bv_len )) {
330
331 /* If it's CLEARTEXT, skip past scheme spec */
332 cbv.bv_len = op.o_bd->be_rootpw.bv_len -
333 sc_cleartext.bv_len;
334 if ( cbv.bv_len ) {
335 cbv.bv_val = op.o_bd->be_rootpw.bv_val +
336 sc_cleartext.bv_len;
337 }
338 }
339 /* No scheme, use the whole value */
340 } else {
341 cbv = op.o_bd->be_rootpw;
342 }
343 if ( !BER_BVISEMPTY( &cbv )) {
344 for( i = 0; sl.list[i].name; i++ ) {
345 const char *name = sl.list[i].name;
346
347 if ( name[0] == '*' ) {
348 if ( flags & SASL_AUXPROP_AUTHZID ) continue;
349 name++;
350 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
351 continue;
352
353 if ( !strcasecmp(name,"userPassword") ) {
354 sl.sparams->utils->prop_set( sl.sparams->propctx,
355 sl.list[i].name, cbv.bv_val, cbv.bv_len );
356 break;
357 }
358 }
359 }
360 }
361
362 if ( op.o_bd->be_search ) {
363 SlapReply rs = {REP_RESULT};
364 op.o_hdr = conn->c_sasl_bindop->o_hdr;
365 op.o_tag = LDAP_REQ_SEARCH;
366 op.o_dn = conn->c_ndn;
367 op.o_ndn = conn->c_ndn;
368 op.o_callback = &cb;
369 slap_op_time( &op.o_time, &op.o_tincr );
370 op.o_do_not_cache = 1;
371 op.o_is_auth_check = 1;
372 op.o_req_dn = op.o_req_ndn;
373 op.ors_scope = LDAP_SCOPE_BASE;
374 op.ors_deref = LDAP_DEREF_NEVER;
375 op.ors_tlimit = SLAP_NO_LIMIT;
376 op.ors_slimit = 1;
377 op.ors_filter = &generic_filter;
378 op.ors_filterstr = generic_filterstr;
379 /* FIXME: we want all attributes, right? */
380 op.ors_attrs = NULL;
381
382 op.o_bd->be_search( &op, &rs );
383 }
384 }
385 }
386 }
387
388 #if SASL_VERSION_FULL >= 0x020110
389 static int
390 slap_auxprop_store(
391 void *glob_context,
392 sasl_server_params_t *sparams,
393 struct propctx *prctx,
394 const char *user,
395 unsigned ulen)
396 {
397 Operation op = {0};
398 Opheader oph;
399 SlapReply rs = {REP_RESULT};
400 int rc, i, j;
401 Connection *conn = NULL;
402 const struct propval *pr;
403 Modifications *modlist = NULL, **modtail = &modlist, *mod;
404 slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
405 char textbuf[SLAP_TEXT_BUFLEN];
406 const char *text;
407 size_t textlen = sizeof(textbuf);
408
409 /* just checking if we are enabled */
410 if (!prctx) return SASL_OK;
411
412 if (!sparams || !user) return SASL_BADPARAM;
413
414 pr = sparams->utils->prop_get( sparams->propctx );
415
416 /* Find our DN and conn first */
417 for( i = 0; pr[i].name; i++ ) {
418 if ( pr[i].name[0] == '*' ) {
419 if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
420 if ( pr[i].values && pr[i].values[0] )
421 AC_MEMCPY( &conn, pr[i].values[0], sizeof( conn ) );
422 continue;
423 }
424 if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
425 if ( pr[i].values && pr[i].values[0] )
426 AC_MEMCPY( &op.o_req_ndn.bv_len, pr[i].values[0],
427 sizeof( op.o_req_ndn.bv_len ) );
428 } else if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
429 if ( pr[i].values )
430 op.o_req_ndn.bv_val = (char *)pr[i].values[0];
431 }
432 }
433 }
434 if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
435
436 op.o_bd = select_backend( &op.o_req_ndn, 1 );
437
438 if ( !op.o_bd || !op.o_bd->be_modify ) return SASL_FAIL;
439
440 pr = sparams->utils->prop_get( prctx );
441 if (!pr) return SASL_BADPARAM;
442
443 for (i=0; pr[i].name; i++);
444 if (!i) return SASL_BADPARAM;
445
446 for (i=0; pr[i].name; i++) {
447 mod = (Modifications *)ch_malloc( sizeof(Modifications) );
448 mod->sml_op = LDAP_MOD_REPLACE;
449 mod->sml_flags = 0;
450 ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
451 mod->sml_numvals = pr[i].nvalues;
452 mod->sml_values = (struct berval *)ch_malloc( (pr[i].nvalues + 1) *
453 sizeof(struct berval));
454 for (j=0; j<pr[i].nvalues; j++) {
455 ber_str2bv( pr[i].values[j], 0, 1, &mod->sml_values[j]);
456 }
457 BER_BVZERO( &mod->sml_values[j] );
458 mod->sml_nvalues = NULL;
459 mod->sml_desc = NULL;
460 *modtail = mod;
461 modtail = &mod->sml_next;
462 }
463 *modtail = NULL;
464
465 rc = slap_mods_check( &op, modlist, &text, textbuf, textlen, NULL );
466
467 if ( rc == LDAP_SUCCESS ) {
468 rc = slap_mods_no_user_mod_check( &op, modlist,
469 &text, textbuf, textlen );
470
471 if ( rc == LDAP_SUCCESS ) {
472 if ( conn->c_sasl_bindop ) {
473 op.o_hdr = conn->c_sasl_bindop->o_hdr;
474 } else {
475 op.o_hdr = &oph;
476 memset( &oph, 0, sizeof(oph) );
477 operation_fake_init( conn, &op, ldap_pvt_thread_pool_context(), 0 );
478 }
479 op.o_tag = LDAP_REQ_MODIFY;
480 op.o_ndn = op.o_req_ndn;
481 op.o_callback = &cb;
482 slap_op_time( &op.o_time, &op.o_tincr );
483 op.o_do_not_cache = 1;
484 op.o_is_auth_check = 1;
485 op.o_req_dn = op.o_req_ndn;
486 op.orm_modlist = modlist;
487
488 rc = op.o_bd->be_modify( &op, &rs );
489 }
490 }
491 slap_mods_free( modlist, 1 );
492 return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
493 }
494 #endif /* SASL_VERSION_FULL >= 2.1.16 */
495
496 static sasl_auxprop_plug_t slap_auxprop_plugin = {
497 0, /* Features */
498 0, /* spare */
499 NULL, /* glob_context */
500 NULL, /* auxprop_free */
501 slap_auxprop_lookup,
502 "slapd", /* name */
503 #if SASL_VERSION_FULL >= 0x020110
504 slap_auxprop_store /* the declaration of this member changed
505 * in cyrus SASL from 2.1.15 to 2.1.16 */
506 #else
507 NULL
508 #endif
509 };
510
511 static int
512 slap_auxprop_init(
513 const sasl_utils_t *utils,
514 int max_version,
515 int *out_version,
516 sasl_auxprop_plug_t **plug,
517 const char *plugname)
518 {
519 if ( !out_version || !plug ) return SASL_BADPARAM;
520
521 if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
522
523 *out_version = SASL_AUXPROP_PLUG_VERSION;
524 *plug = &slap_auxprop_plugin;
525 return SASL_OK;
526 }
527
528 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
529 * auxiliary property, so that we can refer to it in sasl_authorize
530 * without interfering with anything else. Also, the SASL username
531 * buffer is constrained to 256 characters, and our DNs could be
532 * much longer (SLAP_LDAPDN_MAXLEN, currently set to 8192)
533 */
534 static int
535 slap_sasl_canonicalize(
536 sasl_conn_t *sconn,
537 void *context,
538 const char *in,
539 unsigned inlen,
540 unsigned flags,
541 const char *user_realm,
542 char *out,
543 unsigned out_max,
544 unsigned *out_len)
545 {
546 Connection *conn = (Connection *)context;
547 struct propctx *props = sasl_auxprop_getctx( sconn );
548 struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
549 struct berval dn;
550 int rc, which;
551 const char *names[2];
552 struct berval bvin;
553
554 *out_len = 0;
555
556 Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
557 conn ? conn->c_connid : -1,
558 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
559 in ? in : "<empty>");
560
561 /* If name is too big, just truncate. We don't care, we're
562 * using DNs, not the usernames.
563 */
564 if ( inlen > out_max )
565 inlen = out_max-1;
566
567 /* This is a Simple Bind using SPASSWD. That means the in-directory
568 * userPassword of the Binding user already points at SASL, so it
569 * cannot be used to actually satisfy a password comparison. Just
570 * ignore it, some other mech will process it.
571 */
572 if ( !conn->c_sasl_bindop ||
573 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) goto done;
574
575 /* See if we need to add request, can only do it once */
576 prop_getnames( props, slap_propnames, auxvals );
577 if ( !auxvals[0].name )
578 prop_request( props, slap_propnames );
579
580 if ( flags & SASL_CU_AUTHID )
581 which = SLAP_SASL_PROP_AUTHCLEN;
582 else
583 which = SLAP_SASL_PROP_AUTHZLEN;
584
585 /* Need to store the Connection for auxprop_lookup */
586 if ( !auxvals[SLAP_SASL_PROP_CONN].values ) {
587 names[0] = slap_propnames[SLAP_SASL_PROP_CONN];
588 names[1] = NULL;
589 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
590 }
591
592 /* Already been here? */
593 if ( auxvals[which].values )
594 goto done;
595
596 /* Normally we require an authzID to have a u: or dn: prefix.
597 * However, SASL frequently gives us an authzID that is just
598 * an exact copy of the authcID, without a prefix. We need to
599 * detect and allow this condition. If SASL calls canonicalize
600 * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
601 * But if it's broken into two calls, we need to remember the
602 * authcID so that we can compare the authzID later. We store
603 * the authcID temporarily in conn->c_sasl_dn. We necessarily
604 * finish Canonicalizing before Authorizing, so there is no
605 * conflict with slap_sasl_authorize's use of this temp var.
606 *
607 * The SASL EXTERNAL mech is backwards from all the other mechs,
608 * it does authzID before the authcID. If we see that authzID
609 * has already been done, don't do anything special with authcID.
610 */
611 if ( flags == SASL_CU_AUTHID && !auxvals[SLAP_SASL_PROP_AUTHZ].values ) {
612 conn->c_sasl_dn.bv_val = (char *) in;
613 conn->c_sasl_dn.bv_len = 0;
614 } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
615 rc = strcmp( in, conn->c_sasl_dn.bv_val );
616 conn->c_sasl_dn.bv_val = NULL;
617 /* They were equal, no work needed */
618 if ( !rc ) goto done;
619 }
620
621 bvin.bv_val = (char *)in;
622 bvin.bv_len = inlen;
623 rc = slap_sasl_getdn( conn, NULL, &bvin, (char *)user_realm, &dn,
624 (flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
625 if ( rc != LDAP_SUCCESS ) {
626 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
627 return SASL_NOAUTHZ;
628 }
629
630 names[0] = slap_propnames[which];
631 names[1] = NULL;
632 prop_set( props, names[0], (char *)&dn.bv_len, sizeof( dn.bv_len ) );
633
634 which++;
635 names[0] = slap_propnames[which];
636 prop_set( props, names[0], dn.bv_val, dn.bv_len );
637
638 Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
639 conn ? conn->c_connid : -1, names[0]+1,
640 dn.bv_val ? dn.bv_val : "<EMPTY>" );
641
642 /* Not needed any more, SASL has copied it */
643 if ( conn && conn->c_sasl_bindop )
644 conn->c_sasl_bindop->o_tmpfree( dn.bv_val, conn->c_sasl_bindop->o_tmpmemctx );
645
646 done:
647 AC_MEMCPY( out, in, inlen );
648 out[inlen] = '\0';
649
650 *out_len = inlen;
651
652 return SASL_OK;
653 }
654
655 static int
656 slap_sasl_authorize(
657 sasl_conn_t *sconn,
658 void *context,
659 char *requested_user,
660 unsigned rlen,
661 char *auth_identity,
662 unsigned alen,
663 const char *def_realm,
664 unsigned urlen,
665 struct propctx *props)
666 {
667 Connection *conn = (Connection *)context;
668 /* actually:
669 * (SLAP_SASL_PROP_COUNT - 1) because we skip "conn",
670 * + 1 for NULL termination?
671 */
672 struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
673 struct berval authcDN, authzDN = BER_BVNULL;
674 int rc;
675
676 /* Simple Binds don't support proxy authorization, ignore it */
677 if ( !conn->c_sasl_bindop ||
678 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) return SASL_OK;
679
680 Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
681 "authcid=\"%s\" authzid=\"%s\"\n",
682 conn ? conn->c_connid : -1, auth_identity, requested_user );
683 if ( conn->c_sasl_dn.bv_val ) {
684 BER_BVZERO( &conn->c_sasl_dn );
685 }
686
687 /* Skip SLAP_SASL_PROP_CONN */
688 prop_getnames( props, slap_propnames+1, auxvals );
689
690 /* Should not happen */
691 if ( !auxvals[0].values ) {
692 sasl_seterror( sconn, 0, "invalid authcid" );
693 return SASL_NOAUTHZ;
694 }
695
696 AC_MEMCPY( &authcDN.bv_len, auxvals[0].values[0], sizeof(authcDN.bv_len) );
697 authcDN.bv_val = auxvals[1].values ? (char *)auxvals[1].values[0] : NULL;
698 conn->c_sasl_dn = authcDN;
699
700 /* Nothing to do if no authzID was given */
701 if ( !auxvals[2].name || !auxvals[2].values ) {
702 goto ok;
703 }
704
705 AC_MEMCPY( &authzDN.bv_len, auxvals[2].values[0], sizeof(authzDN.bv_len) );
706 authzDN.bv_val = auxvals[3].values ? (char *)auxvals[3].values[0] : NULL;
707
708 rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
709 if ( rc != LDAP_SUCCESS ) {
710 Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
711 "proxy authorization disallowed (%d)\n",
712 (long) (conn ? conn->c_connid : -1), rc, 0 );
713
714 sasl_seterror( sconn, 0, "not authorized" );
715 return SASL_NOAUTHZ;
716 }
717
718 /* FIXME: we need yet another dup because slap_sasl_getdn()
719 * is using the bind operation slab */
720 ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
721
722 ok:
723 if (conn->c_sasl_bindop) {
724 Statslog( LDAP_DEBUG_STATS,
725 "%s BIND authcid=\"%s\" authzid=\"%s\"\n",
726 conn->c_sasl_bindop->o_log_prefix,
727 auth_identity, requested_user, 0, 0 );
728 }
729
730 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
731 " proxy authorization allowed authzDN=\"%s\"\n",
732 (long) (conn ? conn->c_connid : -1),
733 authzDN.bv_val ? authzDN.bv_val : "", 0 );
734 return SASL_OK;
735 }
736
737 static int
738 slap_sasl_err2ldap( int saslerr )
739 {
740 int rc;
741
742 /* map SASL errors to LDAP resultCode returned by:
743 * sasl_server_new()
744 * SASL_OK, SASL_NOMEM
745 * sasl_server_step()
746 * SASL_OK, SASL_CONTINUE, SASL_TRANS, SASL_BADPARAM, SASL_BADPROT,
747 * ...
748 * sasl_server_start()
749 * + SASL_NOMECH
750 * sasl_setprop()
751 * SASL_OK, SASL_BADPARAM
752 */
753
754 switch (saslerr) {
755 case SASL_OK:
756 rc = LDAP_SUCCESS;
757 break;
758 case SASL_CONTINUE:
759 rc = LDAP_SASL_BIND_IN_PROGRESS;
760 break;
761 case SASL_FAIL:
762 case SASL_NOMEM:
763 rc = LDAP_OTHER;
764 break;
765 case SASL_NOMECH:
766 rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
767 break;
768 case SASL_BADAUTH:
769 case SASL_NOUSER:
770 case SASL_TRANS:
771 case SASL_EXPIRED:
772 rc = LDAP_INVALID_CREDENTIALS;
773 break;
774 case SASL_NOAUTHZ:
775 rc = LDAP_INSUFFICIENT_ACCESS;
776 break;
777 case SASL_TOOWEAK:
778 case SASL_ENCRYPT:
779 rc = LDAP_INAPPROPRIATE_AUTH;
780 break;
781 case SASL_UNAVAIL:
782 case SASL_TRYAGAIN:
783 rc = LDAP_UNAVAILABLE;
784 break;
785 case SASL_DISABLED:
786 rc = LDAP_UNWILLING_TO_PERFORM;
787 break;
788 default:
789 rc = LDAP_OTHER;
790 break;
791 }
792
793 return rc;
794 }
795
796 #ifdef SLAPD_SPASSWD
797
798 static struct berval sasl_pwscheme = BER_BVC("{SASL}");
799
800 static int chk_sasl(
801 const struct berval *sc,
802 const struct berval * passwd,
803 const struct berval * cred,
804 const char **text )
805 {
806 unsigned int i;
807 int rtn;
808 void *ctx, *sconn = NULL;
809
810 for( i=0; i<cred->bv_len; i++) {
811 if(cred->bv_val[i] == '\0') {
812 return LUTIL_PASSWD_ERR; /* NUL character in password */
813 }
814 }
815
816 if( cred->bv_val[i] != '\0' ) {
817 return LUTIL_PASSWD_ERR; /* cred must behave like a string */
818 }
819
820 for( i=0; i<passwd->bv_len; i++) {
821 if(passwd->bv_val[i] == '\0') {
822 return LUTIL_PASSWD_ERR; /* NUL character in password */
823 }
824 }
825
826 if( passwd->bv_val[i] != '\0' ) {
827 return LUTIL_PASSWD_ERR; /* passwd must behave like a string */
828 }
829
830 rtn = LUTIL_PASSWD_ERR;
831
832 ctx = ldap_pvt_thread_pool_context();
833 ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sasl_bind, &sconn, NULL );
834
835 if( sconn != NULL ) {
836 int sc;
837 sc = sasl_checkpass( sconn,
838 passwd->bv_val, passwd->bv_len,
839 cred->bv_val, cred->bv_len );
840 rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
841 }
842
843 return rtn;
844 }
845 #endif /* SLAPD_SPASSWD */
846
847 #endif /* HAVE_CYRUS_SASL */
848
849 #ifdef ENABLE_REWRITE
850
851 typedef struct slapd_map_data {
852 struct berval base;
853 struct berval filter;
854 AttributeName attrs[2];
855 int scope;
856 } slapd_map_data;
857
858 static void *
859 slapd_rw_config( const char *fname, int lineno, int argc, char **argv )
860 {
861 slapd_map_data *ret = NULL;
862 LDAPURLDesc *lud = NULL;
863 char *uri;
864 AttributeDescription *ad = NULL;
865 int rc, flen = 0;
866 struct berval dn, ndn;
867
868 if ( argc != 1 ) {
869 Debug( LDAP_DEBUG_ANY,
870 "[%s:%d] slapd map needs URI\n",
871 fname, lineno, 0 );
872 return NULL;
873 }
874
875 uri = argv[0];
876 if ( strncasecmp( uri, "uri=", STRLENOF( "uri=" ) ) == 0 ) {
877 uri += STRLENOF( "uri=" );
878 }
879
880 if ( ldap_url_parse( uri, &lud ) != LDAP_URL_SUCCESS ) {
881 Debug( LDAP_DEBUG_ANY,
882 "[%s:%d] illegal URI '%s'\n",
883 fname, lineno, uri );
884 return NULL;
885 }
886
887 if ( strcasecmp( lud->lud_scheme, "ldap" )) {
888 Debug( LDAP_DEBUG_ANY,
889 "[%s:%d] illegal URI scheme '%s'\n",
890 fname, lineno, lud->lud_scheme );
891 goto done;
892 }
893
894 if (( lud->lud_host && lud->lud_host[0] ) || lud->lud_exts
895 || !lud->lud_dn ) {
896 Debug( LDAP_DEBUG_ANY,
897 "[%s:%d] illegal URI '%s'\n",
898 fname, lineno, uri );
899 goto done;
900 }
901
902 if ( lud->lud_attrs ) {
903 if ( lud->lud_attrs[1] ) {
904 Debug( LDAP_DEBUG_ANY,
905 "[%s:%d] only one attribute allowed in URI\n",
906 fname, lineno, 0 );
907 goto done;
908 }
909 if ( strcasecmp( lud->lud_attrs[0], "dn" ) &&
910 strcasecmp( lud->lud_attrs[0], "entryDN" )) {
911 const char *text;
912 rc = slap_str2ad( lud->lud_attrs[0], &ad, &text );
913 if ( rc )
914 goto done;
915 }
916 }
917 ber_str2bv( lud->lud_dn, 0, 0, &dn );
918 if ( dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ))
919 goto done;
920
921 if ( lud->lud_filter ) {
922 flen = strlen( lud->lud_filter ) + 1;
923 }
924 ret = ch_malloc( sizeof( slapd_map_data ) + flen );
925 ret->base = ndn;
926 if ( flen ) {
927 ret->filter.bv_val = (char *)(ret+1);
928 ret->filter.bv_len = flen - 1;
929 strcpy( ret->filter.bv_val, lud->lud_filter );
930 } else {
931 BER_BVZERO( &ret->filter );
932 }
933 ret->scope = lud->lud_scope;
934 if ( ad ) {
935 ret->attrs[0].an_name = ad->ad_cname;
936 } else {
937 BER_BVZERO( &ret->attrs[0].an_name );
938 }
939 ret->attrs[0].an_desc = ad;
940 BER_BVZERO( &ret->attrs[1].an_name );
941 done:
942 ldap_free_urldesc( lud );
943 return ret;
944 }
945
946 struct slapd_rw_info {
947 slapd_map_data *si_data;
948 struct berval si_val;
949 };
950
951 static int
952 slapd_rw_cb( Operation *op, SlapReply *rs )
953 {
954 if ( rs->sr_type == REP_SEARCH ) {
955 struct slapd_rw_info *si = op->o_callback->sc_private;
956
957 if ( si->si_data->attrs[0].an_desc ) {
958 Attribute *a;
959
960 a = attr_find( rs->sr_entry->e_attrs,
961 si->si_data->attrs[0].an_desc );
962 if ( a ) {
963 ber_dupbv( &si->si_val, a->a_vals );
964 }
965 } else {
966 ber_dupbv( &si->si_val, &rs->sr_entry->e_name );
967 }
968 }
969 return LDAP_SUCCESS;
970 }
971
972 static int
973 slapd_rw_apply( void *private, const char *filter, struct berval *val )
974 {
975 slapd_map_data *sl = private;
976 slap_callback cb = { NULL };
977 Connection conn = {0};
978 OperationBuffer opbuf;
979 Operation *op;
980 void *thrctx;
981 SlapReply rs = {REP_RESULT};
982 struct slapd_rw_info si;
983 char *ptr;
984 int rc;
985
986 thrctx = ldap_pvt_thread_pool_context();
987 connection_fake_init2( &conn, &opbuf, thrctx, 0 );
988 op = &opbuf.ob_op;
989
990 op->o_tag = LDAP_REQ_SEARCH;
991 op->o_req_dn = op->o_req_ndn = sl->base;
992 op->o_bd = select_backend( &op->o_req_ndn, 1 );
993 if ( !op->o_bd ) {
994 return REWRITE_ERR;
995 }
996 si.si_data = sl;
997 BER_BVZERO( &si.si_val );
998 op->ors_scope = sl->scope;
999 op->ors_deref = LDAP_DEREF_NEVER;
1000 op->ors_slimit = 1;
1001 op->ors_tlimit = SLAP_NO_LIMIT;
1002 if ( sl->attrs[0].an_desc ) {
1003 op->ors_attrs = sl->attrs;
1004 } else {
1005 op->ors_attrs = slap_anlist_no_attrs;
1006 }
1007 if ( filter ) {
1008 rc = strlen( filter );
1009 } else {
1010 rc = 0;
1011 }
1012 rc += sl->filter.bv_len;
1013 ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( rc + 1, op->o_tmpmemctx );
1014 if ( sl->filter.bv_len ) {
1015 ptr = lutil_strcopy( ptr, sl->filter.bv_val );
1016 } else {
1017 *ptr = '\0';
1018 }
1019 if ( filter ) {
1020 strcpy( ptr, filter );
1021 }
1022 op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
1023 if ( !op->ors_filter ) {
1024 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1025 return REWRITE_ERR;
1026 }
1027
1028 op->ors_attrsonly = 0;
1029 op->o_dn = op->o_bd->be_rootdn;
1030 op->o_ndn = op->o_bd->be_rootndn;
1031 op->o_do_not_cache = 1;
1032
1033 cb.sc_response = slapd_rw_cb;
1034 cb.sc_private = &si;
1035 op->o_callback = &cb;
1036
1037 rc = op->o_bd->be_search( op, &rs );
1038 if ( rc == LDAP_SUCCESS && !BER_BVISNULL( &si.si_val )) {
1039 *val = si.si_val;
1040 rc = REWRITE_SUCCESS;
1041 } else {
1042 if ( !BER_BVISNULL( &si.si_val )) {
1043 ch_free( si.si_val.bv_val );
1044 }
1045 rc = REWRITE_ERR;
1046 }
1047 filter_free_x( op, op->ors_filter );
1048 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1049 return rc;
1050 }
1051
1052 static int
1053 slapd_rw_destroy( void *private )
1054 {
1055 slapd_map_data *md = private;
1056
1057 assert( private != NULL );
1058
1059 ch_free( md->base.bv_val );
1060 ch_free( md->filter.bv_val );
1061 ch_free( md );
1062
1063 return 0;
1064 }
1065
1066 static const rewrite_mapper slapd_mapper = {
1067 "slapd",
1068 slapd_rw_config,
1069 slapd_rw_apply,
1070 slapd_rw_destroy
1071 };
1072 #endif
1073
1074 int slap_sasl_init( void )
1075 {
1076 #ifdef HAVE_CYRUS_SASL
1077 int rc;
1078 static sasl_callback_t server_callbacks[] = {
1079 { SASL_CB_LOG, &slap_sasl_log, NULL },
1080 { SASL_CB_LIST_END, NULL, NULL }
1081 };
1082 #endif
1083
1084 #ifdef ENABLE_REWRITE
1085 rewrite_mapper_register( &slapd_mapper );
1086 #endif
1087
1088 #ifdef HAVE_CYRUS_SASL
1089 #ifdef HAVE_SASL_VERSION
1090 /* stringify the version number, sasl.h doesn't do it for us */
1091 #define VSTR0(maj, min, pat) #maj "." #min "." #pat
1092 #define VSTR(maj, min, pat) VSTR0(maj, min, pat)
1093 #define SASL_VERSION_STRING VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
1094 SASL_VERSION_STEP)
1095
1096 sasl_version( NULL, &rc );
1097 if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
1098 (rc & 0xffff) < SASL_VERSION_STEP)
1099 {
1100 char version[sizeof("xxx.xxx.xxxxx")];
1101 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
1102 rc & 0xffff );
1103 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: SASL library version mismatch:"
1104 " expected %s, got %s\n",
1105 SASL_VERSION_STRING, version, 0 );
1106 return -1;
1107 }
1108 #endif
1109
1110 sasl_set_mutex(
1111 ldap_pvt_sasl_mutex_new,
1112 ldap_pvt_sasl_mutex_lock,
1113 ldap_pvt_sasl_mutex_unlock,
1114 ldap_pvt_sasl_mutex_dispose );
1115
1116 generic_filter.f_desc = slap_schema.si_ad_objectClass;
1117
1118 rc = sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
1119 if( rc != SASL_OK ) {
1120 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: auxprop add plugin failed\n",
1121 0, 0, 0 );
1122 return -1;
1123 }
1124
1125 /* should provide callbacks for logging */
1126 /* server name should be configurable */
1127 rc = sasl_server_init( server_callbacks, "slapd" );
1128
1129 if( rc != SASL_OK ) {
1130 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: server init failed\n",
1131 0, 0, 0 );
1132
1133 return -1;
1134 }
1135
1136 #ifdef SLAPD_SPASSWD
1137 lutil_passwd_add( &sasl_pwscheme, chk_sasl, NULL );
1138 #endif
1139
1140 Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1141 0, 0, 0 );
1142
1143 /* default security properties */
1144 memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1145 sasl_secprops.max_ssf = INT_MAX;
1146 sasl_secprops.maxbufsize = 65536;
1147 sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1148 #endif
1149
1150 return 0;
1151 }
1152
1153 int slap_sasl_destroy( void )
1154 {
1155 #ifdef HAVE_CYRUS_SASL
1156 sasl_done();
1157 #endif
1158 free( sasl_host );
1159 sasl_host = NULL;
1160
1161 return 0;
1162 }
1163
1164 static char *
1165 slap_sasl_peer2ipport( struct berval *peer )
1166 {
1167 int isv6 = 0;
1168 char *ipport, *p,
1169 *addr = &peer->bv_val[ STRLENOF( "IP=" ) ];
1170 ber_len_t plen = peer->bv_len - STRLENOF( "IP=" );
1171
1172 /* IPv6? */
1173 if ( addr[0] == '[' ) {
1174 isv6 = 1;
1175 plen--;
1176 }
1177 ipport = ch_strdup( &addr[isv6] );
1178
1179 /* Convert IPv6/IPv4 addresses to address;port syntax. */
1180 p = strrchr( ipport, ':' );
1181 if ( p != NULL ) {
1182 *p = ';';
1183 if ( isv6 ) {
1184 assert( p[-1] == ']' );
1185 AC_MEMCPY( &p[-1], p, plen - ( p - ipport ) + 1 );
1186 }
1187
1188 } else if ( isv6 ) {
1189 /* trim ']' */
1190 plen--;
1191 assert( addr[plen] == ']' );
1192 addr[plen] = '\0';
1193 }
1194
1195 return ipport;
1196 }
1197
1198 int slap_sasl_open( Connection *conn, int reopen )
1199 {
1200 int sc = LDAP_SUCCESS;
1201 #ifdef HAVE_CYRUS_SASL
1202 int cb;
1203
1204 sasl_conn_t *ctx = NULL;
1205 sasl_callback_t *session_callbacks;
1206 char *ipremoteport = NULL, *iplocalport = NULL;
1207
1208 assert( conn->c_sasl_authctx == NULL );
1209
1210 if ( !reopen ) {
1211 assert( conn->c_sasl_extra == NULL );
1212
1213 session_callbacks =
1214 SLAP_CALLOC( 5, sizeof(sasl_callback_t));
1215 if( session_callbacks == NULL ) {
1216 Debug( LDAP_DEBUG_ANY,
1217 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1218 return -1;
1219 }
1220 conn->c_sasl_extra = session_callbacks;
1221
1222 session_callbacks[cb=0].id = SASL_CB_LOG;
1223 session_callbacks[cb].proc = &slap_sasl_log;
1224 session_callbacks[cb++].context = conn;
1225
1226 session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1227 session_callbacks[cb].proc = &slap_sasl_authorize;
1228 session_callbacks[cb++].context = conn;
1229
1230 session_callbacks[cb].id = SASL_CB_CANON_USER;
1231 session_callbacks[cb].proc = &slap_sasl_canonicalize;
1232 session_callbacks[cb++].context = conn;
1233
1234 session_callbacks[cb].id = SASL_CB_LIST_END;
1235 session_callbacks[cb].proc = NULL;
1236 session_callbacks[cb++].context = NULL;
1237 } else {
1238 session_callbacks = conn->c_sasl_extra;
1239 }
1240
1241 conn->c_sasl_layers = 0;
1242
1243 /* create new SASL context */
1244 if ( conn->c_sock_name.bv_len != 0 &&
1245 strncmp( conn->c_sock_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1246 {
1247 iplocalport = slap_sasl_peer2ipport( &conn->c_sock_name );
1248 }
1249
1250 if ( conn->c_peer_name.bv_len != 0 &&
1251 strncmp( conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1252 {
1253 ipremoteport = slap_sasl_peer2ipport( &conn->c_peer_name );
1254 }
1255
1256 sc = sasl_server_new( "ldap", sasl_host, global_realm,
1257 iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
1258 if ( iplocalport != NULL ) {
1259 ch_free( iplocalport );
1260 }
1261 if ( ipremoteport != NULL ) {
1262 ch_free( ipremoteport );
1263 }
1264
1265 if( sc != SASL_OK ) {
1266 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1267 sc, 0, 0 );
1268
1269 return -1;
1270 }
1271
1272 conn->c_sasl_authctx = ctx;
1273
1274 if( sc == SASL_OK ) {
1275 sc = sasl_setprop( ctx,
1276 SASL_SEC_PROPS, &sasl_secprops );
1277
1278 if( sc != SASL_OK ) {
1279 Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1280 sc, 0, 0 );
1281
1282 slap_sasl_close( conn );
1283 return -1;
1284 }
1285 }
1286
1287 sc = slap_sasl_err2ldap( sc );
1288
1289 #elif defined(SLAP_BUILTIN_SASL)
1290 /* built-in SASL implementation */
1291 SASL_CTX *ctx = (SASL_CTX *) SLAP_MALLOC(sizeof(SASL_CTX));
1292 if( ctx == NULL ) return -1;
1293
1294 ctx->sc_external_ssf = 0;
1295 BER_BVZERO( &ctx->sc_external_id );
1296
1297 conn->c_sasl_authctx = ctx;
1298 #endif
1299
1300 return sc;
1301 }
1302
1303 int slap_sasl_external(
1304 Connection *conn,
1305 slap_ssf_t ssf,
1306 struct berval *auth_id )
1307 {
1308 #ifdef HAVE_CYRUS_SASL
1309 int sc;
1310 sasl_conn_t *ctx = conn->c_sasl_authctx;
1311 sasl_ssf_t sasl_ssf = ssf;
1312
1313 if ( ctx == NULL ) {
1314 return LDAP_UNAVAILABLE;
1315 }
1316
1317 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
1318
1319 if ( sc != SASL_OK ) {
1320 return LDAP_OTHER;
1321 }
1322
1323 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL,
1324 auth_id ? auth_id->bv_val : NULL );
1325
1326 if ( sc != SASL_OK ) {
1327 return LDAP_OTHER;
1328 }
1329 #elif defined(SLAP_BUILTIN_SASL)
1330 /* built-in SASL implementation */
1331 SASL_CTX *ctx = conn->c_sasl_authctx;
1332 if ( ctx == NULL ) return LDAP_UNAVAILABLE;
1333
1334 ctx->sc_external_ssf = ssf;
1335 if( auth_id ) {
1336 ctx->sc_external_id = *auth_id;
1337 BER_BVZERO( auth_id );
1338 } else {
1339 BER_BVZERO( &ctx->sc_external_id );
1340 }
1341 #endif
1342
1343 return LDAP_SUCCESS;
1344 }
1345
1346 int slap_sasl_reset( Connection *conn )
1347 {
1348 return LDAP_SUCCESS;
1349 }
1350
1351 char ** slap_sasl_mechs( Connection *conn )
1352 {
1353 char **mechs = NULL;
1354
1355 #ifdef HAVE_CYRUS_SASL
1356 sasl_conn_t *ctx = conn->c_sasl_authctx;
1357
1358 if( ctx == NULL ) ctx = conn->c_sasl_sockctx;
1359
1360 if( ctx != NULL ) {
1361 int sc;
1362 SASL_CONST char *mechstr;
1363
1364 sc = sasl_listmech( ctx,
1365 NULL, NULL, ",", NULL,
1366 &mechstr, NULL, NULL );
1367
1368 if( sc != SASL_OK ) {
1369 Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1370 sc, 0, 0 );
1371
1372 return NULL;
1373 }
1374
1375 mechs = ldap_str2charray( mechstr, "," );
1376 }
1377 #elif defined(SLAP_BUILTIN_SASL)
1378 /* builtin SASL implementation */
1379 SASL_CTX *ctx = conn->c_sasl_authctx;
1380 if ( ctx != NULL && ctx->sc_external_id.bv_val ) {
1381 /* should check ssf */
1382 mechs = ldap_str2charray( "EXTERNAL", "," );
1383 }
1384 #endif
1385
1386 return mechs;
1387 }
1388
1389 int slap_sasl_close( Connection *conn )
1390 {
1391 #ifdef HAVE_CYRUS_SASL
1392 sasl_conn_t *ctx = conn->c_sasl_authctx;
1393
1394 if( ctx != NULL ) {
1395 sasl_dispose( &ctx );
1396 }
1397 if ( conn->c_sasl_sockctx &&
1398 conn->c_sasl_authctx != conn->c_sasl_sockctx )
1399 {
1400 ctx = conn->c_sasl_sockctx;
1401 sasl_dispose( &ctx );
1402 }
1403
1404 conn->c_sasl_authctx = NULL;
1405 conn->c_sasl_sockctx = NULL;
1406 conn->c_sasl_done = 0;
1407
1408 free( conn->c_sasl_extra );
1409 conn->c_sasl_extra = NULL;
1410
1411 #elif defined(SLAP_BUILTIN_SASL)
1412 SASL_CTX *ctx = conn->c_sasl_authctx;
1413 if( ctx ) {
1414 if( ctx->sc_external_id.bv_val ) {
1415 free( ctx->sc_external_id.bv_val );
1416 BER_BVZERO( &ctx->sc_external_id );
1417 }
1418 free( ctx );
1419 conn->c_sasl_authctx = NULL;
1420 }
1421 #endif
1422
1423 return LDAP_SUCCESS;
1424 }
1425
1426 int slap_sasl_bind( Operation *op, SlapReply *rs )
1427 {
1428 #ifdef HAVE_CYRUS_SASL
1429 sasl_conn_t *ctx = op->o_conn->c_sasl_authctx;
1430 struct berval response;
1431 unsigned reslen = 0;
1432 int sc;
1433
1434 Debug(LDAP_DEBUG_ARGS,
1435 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1436 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
1437 op->o_conn->c_sasl_bind_in_progress ? "<continuing>" :
1438 op->o_conn->c_sasl_bind_mech.bv_val,
1439 op->orb_cred.bv_len );
1440
1441 if( ctx == NULL ) {
1442 send_ldap_error( op, rs, LDAP_UNAVAILABLE,
1443 "SASL unavailable on this session" );
1444 return rs->sr_err;
1445 }
1446
1447 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1448 sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1449 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1450 sasl_server_step( ctx, cred, clen, resp, rlen )
1451
1452 if ( !op->o_conn->c_sasl_bind_in_progress ) {
1453 /* If we already authenticated once, must use a new context */
1454 if ( op->o_conn->c_sasl_done ) {
1455 sasl_ssf_t ssf = 0;
1456 const char *authid = NULL;
1457 sasl_getprop( ctx, SASL_SSF_EXTERNAL, (void *)&ssf );
1458 sasl_getprop( ctx, SASL_AUTH_EXTERNAL, (void *)&authid );
1459 if ( authid ) authid = ch_strdup( authid );
1460 if ( ctx != op->o_conn->c_sasl_sockctx ) {
1461 sasl_dispose( &ctx );
1462 }
1463 op->o_conn->c_sasl_authctx = NULL;
1464
1465 slap_sasl_open( op->o_conn, 1 );
1466 ctx = op->o_conn->c_sasl_authctx;
1467 if ( authid ) {
1468 sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1469 sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
1470 ch_free( (char *)authid );
1471 }
1472 }
1473 sc = START( ctx,
1474 op->o_conn->c_sasl_bind_mech.bv_val,
1475 op->orb_cred.bv_val, op->orb_cred.bv_len,
1476 (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1477
1478 } else {
1479 sc = STEP( ctx,
1480 op->orb_cred.bv_val, op->orb_cred.bv_len,
1481 (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1482 }
1483
1484 response.bv_len = reslen;
1485
1486 if ( sc == SASL_OK ) {
1487 sasl_ssf_t *ssf = NULL;
1488
1489 ber_dupbv_x( &op->orb_edn, &op->o_conn->c_sasl_dn, op->o_tmpmemctx );
1490 BER_BVZERO( &op->o_conn->c_sasl_dn );
1491 op->o_conn->c_sasl_done = 1;
1492
1493 rs->sr_err = LDAP_SUCCESS;
1494
1495 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1496 op->orb_ssf = ssf ? *ssf : 0;
1497
1498 ctx = NULL;
1499 if( op->orb_ssf ) {
1500 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1501 op->o_conn->c_sasl_layers++;
1502
1503 /* If there's an old layer, set sockctx to NULL to
1504 * tell connection_read() to wait for us to finish.
1505 * Otherwise there is a race condition: we have to
1506 * send the Bind response using the old security
1507 * context and then remove it before reading any
1508 * new messages.
1509 */
1510 if ( op->o_conn->c_sasl_sockctx ) {
1511 ctx = op->o_conn->c_sasl_sockctx;
1512 op->o_conn->c_sasl_sockctx = NULL;
1513 } else {
1514 op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1515 }
1516 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1517 }
1518
1519 /* Must send response using old security layer */
1520 if (response.bv_len) rs->sr_sasldata = &response;
1521 send_ldap_sasl( op, rs );
1522
1523 /* Now dispose of the old security layer.
1524 */
1525 if ( ctx ) {
1526 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1527 ldap_pvt_sasl_remove( op->o_conn->c_sb );
1528 op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1529 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1530 sasl_dispose( &ctx );
1531 }
1532 } else if ( sc == SASL_CONTINUE ) {
1533 rs->sr_err = LDAP_SASL_BIND_IN_PROGRESS,
1534 rs->sr_text = sasl_errdetail( ctx );
1535 rs->sr_sasldata = &response;
1536 send_ldap_sasl( op, rs );
1537
1538 } else {
1539 BER_BVZERO( &op->o_conn->c_sasl_dn );
1540 rs->sr_text = sasl_errdetail( ctx );
1541 rs->sr_err = slap_sasl_err2ldap( sc ),
1542 send_ldap_result( op, rs );
1543 }
1544
1545 Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rs->sr_err, 0, 0);
1546
1547 #elif defined(SLAP_BUILTIN_SASL)
1548 /* built-in SASL implementation */
1549 SASL_CTX *ctx = op->o_conn->c_sasl_authctx;
1550
1551 if ( ctx == NULL ) {
1552 send_ldap_error( op, rs, LDAP_OTHER,
1553 "Internal SASL Error" );
1554
1555 } else if ( bvmatch( &ext_bv, &op->o_conn->c_sasl_bind_mech ) ) {
1556 /* EXTERNAL */
1557
1558 if( op->orb_cred.bv_len ) {
1559 rs->sr_text = "proxy authorization not support";
1560 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1561 send_ldap_result( op, rs );
1562
1563 } else {
1564 op->orb_edn = ctx->sc_external_id;
1565 rs->sr_err = LDAP_SUCCESS;
1566 rs->sr_sasldata = NULL;
1567 send_ldap_sasl( op, rs );
1568 }
1569
1570 } else {
1571 send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1572 "requested SASL mechanism not supported" );
1573 }
1574 #else
1575 send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1576 "SASL not supported" );
1577 #endif
1578
1579 return rs->sr_err;
1580 }
1581
1582 char* slap_sasl_secprops( const char *in )
1583 {
1584 #ifdef HAVE_CYRUS_SASL
1585 int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1586
1587 return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1588 #else
1589 return "SASL not supported";
1590 #endif
1591 }
1592
1593 void slap_sasl_secprops_unparse( struct berval *bv )
1594 {
1595 #ifdef HAVE_CYRUS_SASL
1596 ldap_pvt_sasl_secprops_unparse( &sasl_secprops, bv );
1597 #endif
1598 }
1599
1600 #ifdef HAVE_CYRUS_SASL
1601 int
1602 slap_sasl_setpass( Operation *op, SlapReply *rs )
1603 {
1604 struct berval id = BER_BVNULL; /* needs to come from connection */
1605 struct berval new = BER_BVNULL;
1606 struct berval old = BER_BVNULL;
1607
1608 assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
1609
1610 rs->sr_err = sasl_getprop( op->o_conn->c_sasl_authctx, SASL_USERNAME,
1611 (SASL_CONST void **)(char *)&id.bv_val );
1612
1613 if( rs->sr_err != SASL_OK ) {
1614 rs->sr_text = "unable to retrieve SASL username";
1615 rs->sr_err = LDAP_OTHER;
1616 goto done;
1617 }
1618
1619 Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1620 id.bv_val ? id.bv_val : "", 0, 0 );
1621
1622 rs->sr_err = slap_passwd_parse( op->ore_reqdata,
1623 NULL, &old, &new, &rs->sr_text );
1624
1625 if( rs->sr_err != LDAP_SUCCESS ) {
1626 goto done;
1627 }
1628
1629 if( new.bv_len == 0 ) {
1630 slap_passwd_generate(&new);
1631
1632 if( new.bv_len == 0 ) {
1633 rs->sr_text = "password generation failed.";
1634 rs->sr_err = LDAP_OTHER;
1635 goto done;
1636 }
1637
1638 rs->sr_rspdata = slap_passwd_return( &new );
1639 }
1640
1641 rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx, id.bv_val,
1642 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1643 if( rs->sr_err != SASL_OK ) {
1644 rs->sr_text = sasl_errdetail( op->o_conn->c_sasl_authctx );
1645 }
1646 switch(rs->sr_err) {
1647 case SASL_OK:
1648 rs->sr_err = LDAP_SUCCESS;
1649 break;
1650
1651 case SASL_NOCHANGE:
1652 case SASL_NOMECH:
1653 case SASL_DISABLED:
1654 case SASL_PWLOCK:
1655 case SASL_FAIL:
1656 case SASL_BADPARAM:
1657 default:
1658 rs->sr_err = LDAP_OTHER;
1659 }
1660
1661 done:
1662 return rs->sr_err;
1663 }
1664 #endif /* HAVE_CYRUS_SASL */
1665
1666 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
1667 * string returned in *dn is in its own allocated memory, and must be free'd
1668 * by the calling process. -Mark Adamson, Carnegie Mellon
1669 *
1670 * The "dn:" prefix is no longer used anywhere inside slapd. It is only used
1671 * on strings passed in directly from SASL. -Howard Chu, Symas Corp.
1672 */
1673
1674 #define SET_NONE 0
1675 #define SET_DN 1
1676 #define SET_U 2
1677
1678 int slap_sasl_getdn( Connection *conn, Operation *op, struct berval *id,
1679 char *user_realm, struct berval *dn, int flags )
1680 {
1681 int rc, is_dn = SET_NONE, do_norm = 1;
1682 struct berval dn2, *mech;
1683
1684 assert( conn != NULL );
1685 assert( id != NULL );
1686
1687 Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: conn %lu id=%s [len=%lu]\n",
1688 conn->c_connid,
1689 BER_BVISNULL( id ) ? "NULL" : ( BER_BVISEMPTY( id ) ? "<empty>" : id->bv_val ),
1690 BER_BVISNULL( id ) ? 0 : ( BER_BVISEMPTY( id ) ? 0 :
1691 (unsigned long) id->bv_len ) );
1692
1693 if ( !op ) {
1694 op = conn->c_sasl_bindop;
1695 }
1696 assert( op != NULL );
1697
1698 BER_BVZERO( dn );
1699
1700 if ( !BER_BVISNULL( id ) ) {
1701 /* Blatantly anonymous ID */
1702 static struct berval bv_anonymous = BER_BVC( "anonymous" );
1703
1704 if ( ber_bvstrcasecmp( id, &bv_anonymous ) == 0 ) {
1705 return( LDAP_SUCCESS );
1706 }
1707
1708 } else {
1709 /* FIXME: if empty, should we stop? */
1710 BER_BVSTR( id, "" );
1711 }
1712
1713 if ( !BER_BVISEMPTY( &conn->c_sasl_bind_mech ) ) {
1714 mech = &conn->c_sasl_bind_mech;
1715 } else {
1716 mech = &conn->c_authmech;
1717 }
1718
1719 /* An authcID needs to be converted to authzID form. Set the
1720 * values directly into *dn; they will be normalized later. (and
1721 * normalizing always makes a new copy.) An ID from a TLS certificate
1722 * is already normalized, so copy it and skip normalization.
1723 */
1724 if( flags & SLAP_GETDN_AUTHCID ) {
1725 if( bvmatch( mech, &ext_bv )) {
1726 /* EXTERNAL DNs are already normalized */
1727 assert( !BER_BVISNULL( id ) );
1728
1729 do_norm = 0;
1730 is_dn = SET_DN;
1731 ber_dupbv_x( dn, id, op->o_tmpmemctx );
1732
1733 } else {
1734 /* convert to u:<username> form */
1735 is_dn = SET_U;
1736 *dn = *id;
1737 }
1738 }
1739
1740 if( is_dn == SET_NONE ) {
1741 if( !strncasecmp( id->bv_val, "u:", STRLENOF( "u:" ) ) ) {
1742 is_dn = SET_U;
1743 dn->bv_val = id->bv_val + STRLENOF( "u:" );
1744 dn->bv_len = id->bv_len - STRLENOF( "u:" );
1745
1746 } else if ( !strncasecmp( id->bv_val, "dn:", STRLENOF( "dn:" ) ) ) {
1747 is_dn = SET_DN;
1748 dn->bv_val = id->bv_val + STRLENOF( "dn:" );
1749 dn->bv_len = id->bv_len - STRLENOF( "dn:" );
1750 }
1751 }
1752
1753 /* No other possibilities from here */
1754 if( is_dn == SET_NONE ) {
1755 BER_BVZERO( dn );
1756 return( LDAP_INAPPROPRIATE_AUTH );
1757 }
1758
1759 /* Username strings */
1760 if( is_dn == SET_U ) {
1761 /* ITS#3419: values may need escape */
1762 LDAPRDN DN[ 5 ];
1763 LDAPAVA *RDNs[ 4 ][ 2 ];
1764 LDAPAVA AVAs[ 4 ];
1765 int irdn;
1766
1767 irdn = 0;
1768 DN[ irdn ] = RDNs[ irdn ];
1769 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1770 AVAs[ irdn ].la_attr = slap_schema.si_ad_uid->ad_cname;
1771 AVAs[ irdn ].la_value = *dn;
1772 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1773 AVAs[ irdn ].la_private = NULL;
1774 RDNs[ irdn ][ 1 ] = NULL;
1775
1776 if ( user_realm && *user_realm ) {
1777 irdn++;
1778 DN[ irdn ] = RDNs[ irdn ];
1779 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1780 AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1781 ber_str2bv( user_realm, 0, 0, &AVAs[ irdn ].la_value );
1782 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1783 AVAs[ irdn ].la_private = NULL;
1784 RDNs[ irdn ][ 1 ] = NULL;
1785 }
1786
1787 if ( !BER_BVISNULL( mech ) ) {
1788 irdn++;
1789 DN[ irdn ] = RDNs[ irdn ];
1790 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1791 AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1792 AVAs[ irdn ].la_value = *mech;
1793 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1794 AVAs[ irdn ].la_private = NULL;
1795 RDNs[ irdn ][ 1 ] = NULL;
1796 }
1797
1798 irdn++;
1799 DN[ irdn ] = RDNs[ irdn ];
1800 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1801 AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1802 BER_BVSTR( &AVAs[ irdn ].la_value, "auth" );
1803 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1804 AVAs[ irdn ].la_private = NULL;
1805 RDNs[ irdn ][ 1 ] = NULL;
1806
1807 irdn++;
1808 DN[ irdn ] = NULL;
1809
1810 rc = ldap_dn2bv_x( DN, dn, LDAP_DN_FORMAT_LDAPV3,
1811 op->o_tmpmemctx );
1812 if ( rc != LDAP_SUCCESS ) {
1813 BER_BVZERO( dn );
1814 return rc;
1815 }
1816
1817 Debug( LDAP_DEBUG_TRACE,
1818 "slap_sasl_getdn: u:id converted to %s\n",
1819 dn->bv_val, 0, 0 );
1820
1821 } else {
1822
1823 /* Dup the DN in any case, so we don't risk
1824 * leaks or dangling pointers later,
1825 * and the DN value is '\0' terminated */
1826 ber_dupbv_x( &dn2, dn, op->o_tmpmemctx );
1827 dn->bv_val = dn2.bv_val;
1828 }
1829
1830 /* All strings are in DN form now. Normalize if needed. */
1831 if ( do_norm ) {
1832 rc = dnNormalize( 0, NULL, NULL, dn, &dn2, op->o_tmpmemctx );
1833
1834 /* User DNs were constructed above and must be freed now */
1835 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
1836
1837 if ( rc != LDAP_SUCCESS ) {
1838 BER_BVZERO( dn );
1839 return rc;
1840 }
1841 *dn = dn2;
1842 }
1843
1844 /* Run thru regexp */
1845 slap_sasl2dn( op, dn, &dn2, flags );
1846 if( !BER_BVISNULL( &dn2 ) ) {
1847 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
1848 *dn = dn2;
1849 Debug( LDAP_DEBUG_TRACE,
1850 "slap_sasl_getdn: dn:id converted to %s\n",
1851 dn->bv_val, 0, 0 );
1852 }
1853
1854 return( LDAP_SUCCESS );
1855 }
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