git.sur5r.net Git - openldap/blob - servers/slapd/sasl.c

   1 /* $OpenLDAP$ */
   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 }