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 1998-2009 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 char *slap_sasl_auxprops;
  67
  68 #ifdef HAVE_CYRUS_SASL
  69
  70 /* Just use our internal auxprop by default */
  71 static int
  72 slap_sasl_getopt(
  73         void *context,
  74         const char *plugin_name,
  75         const char *option,
  76         const char **result,
  77         unsigned *len)
  78 {
  79         if ( strcmp( option, "auxprop_plugin" )) {
  80                 return SASL_FAIL;
  81         }
  82         if ( slap_sasl_auxprops )
  83                 *result = slap_sasl_auxprops;
  84         else
  85                 *result = "slapd";
  86         return SASL_OK;
  87 }
  88
  89 int
  90 slap_sasl_log(
  91         void *context,
  92         int priority,
  93         const char *message)
  94 {
  95         Connection *conn = context;
  96         int level;
  97         const char * label;
  98
  99         if ( message == NULL ) {
 100                 return SASL_BADPARAM;
 101         }
 102
 103         switch (priority) {
 104         case SASL_LOG_NONE:
 105                 level = LDAP_DEBUG_NONE;
 106                 label = "None";
 107                 break;
 108         case SASL_LOG_ERR:
 109                 level = LDAP_DEBUG_ANY;
 110                 label = "Error";
 111                 break;
 112         case SASL_LOG_FAIL:
 113                 level = LDAP_DEBUG_ANY;
 114                 label = "Failure";
 115                 break;
 116         case SASL_LOG_WARN:
 117                 level = LDAP_DEBUG_TRACE;
 118                 label = "Warning";
 119                 break;
 120         case SASL_LOG_NOTE:
 121                 level = LDAP_DEBUG_TRACE;
 122                 label = "Notice";
 123                 break;
 124         case SASL_LOG_DEBUG:
 125                 level = LDAP_DEBUG_TRACE;
 126                 label = "Debug";
 127                 break;
 128         case SASL_LOG_TRACE:
 129                 level = LDAP_DEBUG_TRACE;
 130                 label = "Trace";
 131                 break;
 132         case SASL_LOG_PASS:
 133                 level = LDAP_DEBUG_TRACE;
 134                 label = "Password Trace";
 135                 break;
 136         default:
 137                 return SASL_BADPARAM;
 138         }
 139
 140         Debug( level, "SASL [conn=%ld] %s: %s\n",
 141                 conn ? (long) conn->c_connid: -1L,
 142                 label, message );
 143
 144
 145         return SASL_OK;
 146 }
 147
 148 static const char *slap_propnames[] = {
 149         "*slapConn", "*slapAuthcDNlen", "*slapAuthcDN",
 150         "*slapAuthzDNlen", "*slapAuthzDN", NULL };
 151
 152 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
 153 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
 154
 155 #define SLAP_SASL_PROP_CONN     0
 156 #define SLAP_SASL_PROP_AUTHCLEN 1
 157 #define SLAP_SASL_PROP_AUTHC    2
 158 #define SLAP_SASL_PROP_AUTHZLEN 3
 159 #define SLAP_SASL_PROP_AUTHZ    4
 160 #define SLAP_SASL_PROP_COUNT    5       /* Number of properties we used */
 161
 162 typedef struct lookup_info {
 163         int flags;
 164         const struct propval *list;
 165         sasl_server_params_t *sparams;
 166 } lookup_info;
 167
 168 static slap_response sasl_ap_lookup;
 169
 170 static struct berval sc_cleartext = BER_BVC("{CLEARTEXT}");
 171
 172 static int
 173 sasl_ap_lookup( Operation *op, SlapReply *rs )
 174 {
 175         BerVarray bv;
 176         AttributeDescription *ad;
 177         Attribute *a;
 178         const char *text;
 179         int rc, i;
 180         lookup_info *sl = (lookup_info *)op->o_callback->sc_private;
 181
 182         if (rs->sr_type != REP_SEARCH) return 0;
 183
 184         for( i = 0; sl->list[i].name; i++ ) {
 185                 const char *name = sl->list[i].name;
 186
 187                 if ( name[0] == '*' ) {
 188                         if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
 189                         /* Skip our private properties */
 190                         if ( !strcmp( name, slap_propnames[0] )) {
 191                                 i += SLAP_SASL_PROP_COUNT - 1;
 192                                 continue;
 193                         }
 194                         name++;
 195                 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
 196                         continue;
 197
 198                 if ( sl->list[i].values ) {
 199                         if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
 200                 }
 201                 ad = NULL;
 202                 rc = slap_str2ad( name, &ad, &text );
 203                 if ( rc != LDAP_SUCCESS ) {
 204                         Debug( LDAP_DEBUG_TRACE,
 205                                 "slap_ap_lookup: str2ad(%s): %s\n", name, text, 0 );
 206                         continue;
 207                 }
 208
 209                 /* If it's the rootdn and a rootpw was present, we already set
 210                  * it so don't override it here.
 211                  */
 212                 if ( ad == slap_schema.si_ad_userPassword && sl->list[i].values &&
 213                         be_isroot_dn( op->o_bd, &op->o_req_ndn ))
 214                         continue;
 215
 216                 a = attr_find( rs->sr_entry->e_attrs, ad );
 217                 if ( !a ) continue;
 218                 if ( ! access_allowed( op, rs->sr_entry, ad, NULL, ACL_AUTH, NULL ) ) {
 219                         continue;
 220                 }
 221                 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) ) {
 222                         sl->sparams->utils->prop_erase( sl->sparams->propctx,
 223                         sl->list[i].name );
 224                 }
 225                 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
 226                         /* ITS#3846 don't give hashed passwords to SASL */
 227                         if ( ad == slap_schema.si_ad_userPassword &&
 228                                 bv->bv_val[0] == '{' /*}*/ )
 229                         {
 230                                 if ( lutil_passwd_scheme( bv->bv_val ) ) {
 231                                         /* If it's not a recognized scheme, just assume it's
 232                                          * a cleartext password that happened to include brackets.
 233                                          *
 234                                          * If it's a recognized scheme, skip this value, unless the
 235                                          * scheme is {CLEARTEXT}. In that case, skip over the
 236                                          * scheme name and use the remainder. If there is nothing
 237                                          * past the scheme name, skip this value.
 238                                          */
 239 #ifdef SLAPD_CLEARTEXT
 240                                         if ( !strncasecmp( bv->bv_val, sc_cleartext.bv_val,
 241                                                 sc_cleartext.bv_len )) {
 242                                                 struct berval cbv;
 243                                                 cbv.bv_len = bv->bv_len - sc_cleartext.bv_len;
 244                                                 if ( cbv.bv_len > 0 ) {
 245                                                         cbv.bv_val = bv->bv_val + sc_cleartext.bv_len;
 246                                                         sl->sparams->utils->prop_set( sl->sparams->propctx,
 247                                                                 sl->list[i].name, cbv.bv_val, cbv.bv_len );
 248                                                 }
 249                                         }
 250 #endif
 251                                         continue;
 252                                 }
 253                         }
 254                         sl->sparams->utils->prop_set( sl->sparams->propctx,
 255                                 sl->list[i].name, bv->bv_val, bv->bv_len );
 256                 }
 257         }
 258         return LDAP_SUCCESS;
 259 }
 260
 261 static void
 262 slap_auxprop_lookup(
 263         void *glob_context,
 264         sasl_server_params_t *sparams,
 265         unsigned flags,
 266         const char *user,
 267         unsigned ulen)
 268 {
 269         Operation op = {0};
 270         int i, doit = 0;
 271         Connection *conn = NULL;
 272         lookup_info sl;
 273
 274         sl.list = sparams->utils->prop_get( sparams->propctx );
 275         sl.sparams = sparams;
 276         sl.flags = flags;
 277
 278         /* Find our DN and conn first */
 279         for( i = 0; sl.list[i].name; i++ ) {
 280                 if ( sl.list[i].name[0] == '*' ) {
 281                         if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
 282                                 if ( sl.list[i].values && sl.list[i].values[0] )
 283                                         AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
 284                                 continue;
 285                         }
 286                         if ( flags & SASL_AUXPROP_AUTHZID ) {
 287                                 if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZLEN] )) {
 288                                         if ( sl.list[i].values && sl.list[i].values[0] )
 289                                                 AC_MEMCPY( &op.o_req_ndn.bv_len, sl.list[i].values[0],
 290                                                         sizeof( op.o_req_ndn.bv_len ) );
 291                                 } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZ] )) {
 292                                         if ( sl.list[i].values )
 293                                                 op.o_req_ndn.bv_val = (char *)sl.list[i].values[0];
 294                                         break;
 295                                 }
 296                         }
 297
 298                         if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
 299                                 if ( sl.list[i].values && sl.list[i].values[0] )
 300                                         AC_MEMCPY( &op.o_req_ndn.bv_len, sl.list[i].values[0],
 301                                                 sizeof( op.o_req_ndn.bv_len ) );
 302                         } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
 303                                 if ( sl.list[i].values ) {
 304                                         op.o_req_ndn.bv_val = (char *)sl.list[i].values[0];
 305                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 306                                                 break;
 307                                 }
 308                         }
 309                 }
 310         }
 311
 312         /* Now see what else needs to be fetched */
 313         for( i = 0; sl.list[i].name; i++ ) {
 314                 const char *name = sl.list[i].name;
 315
 316                 if ( name[0] == '*' ) {
 317                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 318                         /* Skip our private properties */
 319                         if ( !strcmp( name, slap_propnames[0] )) {
 320                                 i += SLAP_SASL_PROP_COUNT - 1;
 321                                 continue;
 322                         }
 323                         name++;
 324                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 325                         continue;
 326
 327                 if ( sl.list[i].values ) {
 328                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 329                 }
 330                 doit = 1;
 331                 break;
 332         }
 333
 334         if (doit) {
 335                 slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
 336
 337                 cb.sc_private = &sl;
 338
 339                 op.o_bd = select_backend( &op.o_req_ndn, 1 );
 340
 341                 if ( op.o_bd ) {
 342                         /* For rootdn, see if we can use the rootpw */
 343                         if ( be_isroot_dn( op.o_bd, &op.o_req_ndn ) &&
 344                                 !BER_BVISEMPTY( &op.o_bd->be_rootpw )) {
 345                                 struct berval cbv = BER_BVNULL;
 346
 347                                 /* If there's a recognized scheme, see if it's CLEARTEXT */
 348                                 if ( lutil_passwd_scheme( op.o_bd->be_rootpw.bv_val )) {
 349                                         if ( !strncasecmp( op.o_bd->be_rootpw.bv_val,
 350                                                 sc_cleartext.bv_val, sc_cleartext.bv_len )) {
 351
 352                                                 /* If it's CLEARTEXT, skip past scheme spec */
 353                                                 cbv.bv_len = op.o_bd->be_rootpw.bv_len -
 354                                                         sc_cleartext.bv_len;
 355                                                 if ( cbv.bv_len ) {
 356                                                         cbv.bv_val = op.o_bd->be_rootpw.bv_val +
 357                                                                 sc_cleartext.bv_len;
 358                                                 }
 359                                         }
 360                                 /* No scheme, use the whole value */
 361                                 } else {
 362                                         cbv = op.o_bd->be_rootpw;
 363                                 }
 364                                 if ( !BER_BVISEMPTY( &cbv )) {
 365                                         for( i = 0; sl.list[i].name; i++ ) {
 366                                                 const char *name = sl.list[i].name;
 367
 368                                                 if ( name[0] == '*' ) {
 369                                                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 370                                                                 name++;
 371                                                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 372                                                         continue;
 373
 374                                                 if ( !strcasecmp(name,"userPassword") ) {
 375                                                         sl.sparams->utils->prop_set( sl.sparams->propctx,
 376                                                                 sl.list[i].name, cbv.bv_val, cbv.bv_len );
 377                                                         break;
 378                                                 }
 379                                         }
 380                                 }
 381                         }
 382
 383                         if ( op.o_bd->be_search ) {
 384                                 SlapReply rs = {REP_RESULT};
 385                                 op.o_hdr = conn->c_sasl_bindop->o_hdr;
 386                                 op.o_tag = LDAP_REQ_SEARCH;
 387                                 op.o_dn = conn->c_ndn;
 388                                 op.o_ndn = conn->c_ndn;
 389                                 op.o_callback = &cb;
 390                                 slap_op_time( &op.o_time, &op.o_tincr );
 391                                 op.o_do_not_cache = 1;
 392                                 op.o_is_auth_check = 1;
 393                                 op.o_req_dn = op.o_req_ndn;
 394                                 op.ors_scope = LDAP_SCOPE_BASE;
 395                                 op.ors_deref = LDAP_DEREF_NEVER;
 396                                 op.ors_tlimit = SLAP_NO_LIMIT;
 397                                 op.ors_slimit = 1;
 398                                 op.ors_filter = &generic_filter;
 399                                 op.ors_filterstr = generic_filterstr;
 400                                 /* FIXME: we want all attributes, right? */
 401                                 op.ors_attrs = NULL;
 402
 403                                 op.o_bd->be_search( &op, &rs );
 404                         }
 405                 }
 406         }
 407 }
 408
 409 #if SASL_VERSION_FULL >= 0x020110
 410 static int
 411 slap_auxprop_store(
 412         void *glob_context,
 413         sasl_server_params_t *sparams,
 414         struct propctx *prctx,
 415         const char *user,
 416         unsigned ulen)
 417 {
 418         Operation op = {0};
 419         Opheader oph;
 420         SlapReply rs = {REP_RESULT};
 421         int rc, i;
 422         unsigned j;
 423         Connection *conn = NULL;
 424         const struct propval *pr;
 425         Modifications *modlist = NULL, **modtail = &modlist, *mod;
 426         slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
 427         char textbuf[SLAP_TEXT_BUFLEN];
 428         const char *text;
 429         size_t textlen = sizeof(textbuf);
 430
 431         /* just checking if we are enabled */
 432         if (!prctx) return SASL_OK;
 433
 434         if (!sparams || !user) return SASL_BADPARAM;
 435
 436         pr = sparams->utils->prop_get( sparams->propctx );
 437
 438         /* Find our DN and conn first */
 439         for( i = 0; pr[i].name; i++ ) {
 440                 if ( pr[i].name[0] == '*' ) {
 441                         if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
 442                                 if ( pr[i].values && pr[i].values[0] )
 443                                         AC_MEMCPY( &conn, pr[i].values[0], sizeof( conn ) );
 444                                 continue;
 445                         }
 446                         if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
 447                                 if ( pr[i].values && pr[i].values[0] )
 448                                         AC_MEMCPY( &op.o_req_ndn.bv_len, pr[i].values[0],
 449                                                 sizeof( op.o_req_ndn.bv_len ) );
 450                         } else if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
 451                                 if ( pr[i].values )
 452                                         op.o_req_ndn.bv_val = (char *)pr[i].values[0];
 453                         }
 454                 }
 455         }
 456         if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
 457
 458         op.o_bd = select_backend( &op.o_req_ndn, 1 );
 459
 460         if ( !op.o_bd || !op.o_bd->be_modify ) return SASL_FAIL;
 461
 462         pr = sparams->utils->prop_get( prctx );
 463         if (!pr) return SASL_BADPARAM;
 464
 465         for (i=0; pr[i].name; i++);
 466         if (!i) return SASL_BADPARAM;
 467
 468         for (i=0; pr[i].name; i++) {
 469                 mod = (Modifications *)ch_malloc( sizeof(Modifications) );
 470                 mod->sml_op = LDAP_MOD_REPLACE;
 471                 mod->sml_flags = 0;
 472                 ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
 473                 mod->sml_numvals = pr[i].nvalues;
 474                 mod->sml_values = (struct berval *)ch_malloc( (pr[i].nvalues + 1) *
 475                         sizeof(struct berval));
 476                 for (j=0; j<pr[i].nvalues; j++) {
 477                         ber_str2bv( pr[i].values[j], 0, 1, &mod->sml_values[j]);
 478                 }
 479                 BER_BVZERO( &mod->sml_values[j] );
 480                 mod->sml_nvalues = NULL;
 481                 mod->sml_desc = NULL;
 482                 *modtail = mod;
 483                 modtail = &mod->sml_next;
 484         }
 485         *modtail = NULL;
 486
 487         rc = slap_mods_check( &op, modlist, &text, textbuf, textlen, NULL );
 488
 489         if ( rc == LDAP_SUCCESS ) {
 490                 rc = slap_mods_no_user_mod_check( &op, modlist,
 491                         &text, textbuf, textlen );
 492
 493                 if ( rc == LDAP_SUCCESS ) {
 494                         if ( conn->c_sasl_bindop ) {
 495                                 op.o_hdr = conn->c_sasl_bindop->o_hdr;
 496                         } else {
 497                                 op.o_hdr = &oph;
 498                                 memset( &oph, 0, sizeof(oph) );
 499                                 operation_fake_init( conn, &op, ldap_pvt_thread_pool_context(), 0 );
 500                         }
 501                         op.o_tag = LDAP_REQ_MODIFY;
 502                         op.o_ndn = op.o_req_ndn;
 503                         op.o_callback = &cb;
 504                         slap_op_time( &op.o_time, &op.o_tincr );
 505                         op.o_do_not_cache = 1;
 506                         op.o_is_auth_check = 1;
 507                         op.o_req_dn = op.o_req_ndn;
 508                         op.orm_modlist = modlist;
 509
 510                         rc = op.o_bd->be_modify( &op, &rs );
 511                 }
 512         }
 513         slap_mods_free( modlist, 1 );
 514         return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
 515 }
 516 #endif /* SASL_VERSION_FULL >= 2.1.16 */
 517
 518 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 519         0,      /* Features */
 520         0,      /* spare */
 521         NULL,   /* glob_context */
 522         NULL,   /* auxprop_free */
 523         slap_auxprop_lookup,
 524         "slapd",        /* name */
 525 #if SASL_VERSION_FULL >= 0x020110
 526         slap_auxprop_store      /* the declaration of this member changed
 527                                  * in cyrus SASL from 2.1.15 to 2.1.16 */
 528 #else
 529         NULL
 530 #endif
 531 };
 532
 533 static int
 534 slap_auxprop_init(
 535         const sasl_utils_t *utils,
 536         int max_version,
 537         int *out_version,
 538         sasl_auxprop_plug_t **plug,
 539         const char *plugname)
 540 {
 541         if ( !out_version || !plug ) return SASL_BADPARAM;
 542
 543         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 544
 545         *out_version = SASL_AUXPROP_PLUG_VERSION;
 546         *plug = &slap_auxprop_plugin;
 547         return SASL_OK;
 548 }
 549
 550 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 551  * auxiliary property, so that we can refer to it in sasl_authorize
 552  * without interfering with anything else. Also, the SASL username
 553  * buffer is constrained to 256 characters, and our DNs could be
 554  * much longer (SLAP_LDAPDN_MAXLEN, currently set to 8192)
 555  */
 556 static int
 557 slap_sasl_canonicalize(
 558         sasl_conn_t *sconn,
 559         void *context,
 560         const char *in,
 561         unsigned inlen,
 562         unsigned flags,
 563         const char *user_realm,
 564         char *out,
 565         unsigned out_max,
 566         unsigned *out_len)
 567 {
 568         Connection *conn = (Connection *)context;
 569         struct propctx *props = sasl_auxprop_getctx( sconn );
 570         struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
 571         struct berval dn;
 572         int rc, which;
 573         const char *names[2];
 574         struct berval   bvin;
 575
 576         *out_len = 0;
 577
 578         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
 579                 conn ? (long) conn->c_connid : -1L,
 580                 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 581                 in ? in : "<empty>");
 582
 583         /* If name is too big, just truncate. We don't care, we're
 584          * using DNs, not the usernames.
 585          */
 586         if ( inlen > out_max )
 587                 inlen = out_max-1;
 588
 589         /* This is a Simple Bind using SPASSWD. That means the in-directory
 590          * userPassword of the Binding user already points at SASL, so it
 591          * cannot be used to actually satisfy a password comparison. Just
 592          * ignore it, some other mech will process it.
 593          */
 594         if ( !conn->c_sasl_bindop ||
 595                 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) goto done;
 596
 597         /* See if we need to add request, can only do it once */
 598         prop_getnames( props, slap_propnames, auxvals );
 599         if ( !auxvals[0].name )
 600                 prop_request( props, slap_propnames );
 601
 602         if ( flags & SASL_CU_AUTHID )
 603                 which = SLAP_SASL_PROP_AUTHCLEN;
 604         else
 605                 which = SLAP_SASL_PROP_AUTHZLEN;
 606
 607         /* Need to store the Connection for auxprop_lookup */
 608         if ( !auxvals[SLAP_SASL_PROP_CONN].values ) {
 609                 names[0] = slap_propnames[SLAP_SASL_PROP_CONN];
 610                 names[1] = NULL;
 611                 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
 612         }
 613
 614         /* Already been here? */
 615         if ( auxvals[which].values )
 616                 goto done;
 617
 618         /* Normally we require an authzID to have a u: or dn: prefix.
 619          * However, SASL frequently gives us an authzID that is just
 620          * an exact copy of the authcID, without a prefix. We need to
 621          * detect and allow this condition. If SASL calls canonicalize
 622          * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
 623          * But if it's broken into two calls, we need to remember the
 624          * authcID so that we can compare the authzID later. We store
 625          * the authcID temporarily in conn->c_sasl_dn. We necessarily
 626          * finish Canonicalizing before Authorizing, so there is no
 627          * conflict with slap_sasl_authorize's use of this temp var.
 628          *
 629          * The SASL EXTERNAL mech is backwards from all the other mechs,
 630          * it does authzID before the authcID. If we see that authzID
 631          * has already been done, don't do anything special with authcID.
 632          */
 633         if ( flags == SASL_CU_AUTHID && !auxvals[SLAP_SASL_PROP_AUTHZ].values ) {
 634                 conn->c_sasl_dn.bv_val = (char *) in;
 635                 conn->c_sasl_dn.bv_len = 0;
 636         } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
 637                 rc = strcmp( in, conn->c_sasl_dn.bv_val );
 638                 conn->c_sasl_dn.bv_val = NULL;
 639                 /* They were equal, no work needed */
 640                 if ( !rc ) goto done;
 641         }
 642
 643         bvin.bv_val = (char *)in;
 644         bvin.bv_len = inlen;
 645         rc = slap_sasl_getdn( conn, NULL, &bvin, (char *)user_realm, &dn,
 646                 (flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
 647         if ( rc != LDAP_SUCCESS ) {
 648                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 649                 return SASL_NOAUTHZ;
 650         }
 651
 652         names[0] = slap_propnames[which];
 653         names[1] = NULL;
 654         prop_set( props, names[0], (char *)&dn.bv_len, sizeof( dn.bv_len ) );
 655
 656         which++;
 657         names[0] = slap_propnames[which];
 658         prop_set( props, names[0], dn.bv_val, dn.bv_len );
 659
 660         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
 661                 conn ? (long) conn->c_connid : -1L, names[0]+1,
 662                 dn.bv_val ? dn.bv_val : "<EMPTY>" );
 663
 664         /* Not needed any more, SASL has copied it */
 665         if ( conn && conn->c_sasl_bindop )
 666                 conn->c_sasl_bindop->o_tmpfree( dn.bv_val, conn->c_sasl_bindop->o_tmpmemctx );
 667
 668 done:
 669         AC_MEMCPY( out, in, inlen );
 670         out[inlen] = '\0';
 671
 672         *out_len = inlen;
 673
 674         return SASL_OK;
 675 }
 676
 677 static int
 678 slap_sasl_authorize(
 679         sasl_conn_t *sconn,
 680         void *context,
 681         char *requested_user,
 682         unsigned rlen,
 683         char *auth_identity,
 684         unsigned alen,
 685         const char *def_realm,
 686         unsigned urlen,
 687         struct propctx *props)
 688 {
 689         Connection *conn = (Connection *)context;
 690         /* actually:
 691          *      (SLAP_SASL_PROP_COUNT - 1)      because we skip "conn",
 692          *      + 1                             for NULL termination?
 693          */
 694         struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
 695         struct berval authcDN, authzDN = BER_BVNULL;
 696         int rc;
 697
 698         /* Simple Binds don't support proxy authorization, ignore it */
 699         if ( !conn->c_sasl_bindop ||
 700                 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) return SASL_OK;
 701
 702         Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
 703                 "authcid=\"%s\" authzid=\"%s\"\n",
 704                 conn ? (long) conn->c_connid : -1L, auth_identity, requested_user );
 705         if ( conn->c_sasl_dn.bv_val ) {
 706                 BER_BVZERO( &conn->c_sasl_dn );
 707         }
 708
 709         /* Skip SLAP_SASL_PROP_CONN */
 710         prop_getnames( props, slap_propnames+1, auxvals );
 711
 712         /* Should not happen */
 713         if ( !auxvals[0].values ) {
 714                 sasl_seterror( sconn, 0, "invalid authcid" );
 715                 return SASL_NOAUTHZ;
 716         }
 717
 718         AC_MEMCPY( &authcDN.bv_len, auxvals[0].values[0], sizeof(authcDN.bv_len) );
 719         authcDN.bv_val = auxvals[1].values ? (char *)auxvals[1].values[0] : NULL;
 720         conn->c_sasl_dn = authcDN;
 721
 722         /* Nothing to do if no authzID was given */
 723         if ( !auxvals[2].name || !auxvals[2].values ) {
 724                 goto ok;
 725         }
 726
 727         AC_MEMCPY( &authzDN.bv_len, auxvals[2].values[0], sizeof(authzDN.bv_len) );
 728         authzDN.bv_val = auxvals[3].values ? (char *)auxvals[3].values[0] : NULL;
 729
 730         rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
 731         if ( rc != LDAP_SUCCESS ) {
 732                 Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
 733                         "proxy authorization disallowed (%d)\n",
 734                         conn ? (long) conn->c_connid : -1L, rc, 0 );
 735
 736                 sasl_seterror( sconn, 0, "not authorized" );
 737                 return SASL_NOAUTHZ;
 738         }
 739
 740         /* FIXME: we need yet another dup because slap_sasl_getdn()
 741          * is using the bind operation slab */
 742         ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
 743
 744 ok:
 745         if (conn->c_sasl_bindop) {
 746                 Statslog( LDAP_DEBUG_STATS,
 747                         "%s BIND authcid=\"%s\" authzid=\"%s\"\n",
 748                         conn->c_sasl_bindop->o_log_prefix,
 749                         auth_identity, requested_user, 0, 0 );
 750         }
 751
 752         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 753                 " proxy authorization allowed authzDN=\"%s\"\n",
 754                 conn ? (long) conn->c_connid : -1L,
 755                 authzDN.bv_val ? authzDN.bv_val : "", 0 );
 756         return SASL_OK;
 757 }
 758
 759 static int
 760 slap_sasl_err2ldap( int saslerr )
 761 {
 762         int rc;
 763
 764         /* map SASL errors to LDAP resultCode returned by:
 765          *      sasl_server_new()
 766          *              SASL_OK, SASL_NOMEM
 767          *      sasl_server_step()
 768          *              SASL_OK, SASL_CONTINUE, SASL_TRANS, SASL_BADPARAM, SASL_BADPROT,
 769          *      ...
 770          *      sasl_server_start()
 771          *      + SASL_NOMECH
 772          *      sasl_setprop()
 773          *              SASL_OK, SASL_BADPARAM
 774          */
 775
 776         switch (saslerr) {
 777                 case SASL_OK:
 778                         rc = LDAP_SUCCESS;
 779                         break;
 780                 case SASL_CONTINUE:
 781                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 782                         break;
 783                 case SASL_FAIL:
 784                 case SASL_NOMEM:
 785                         rc = LDAP_OTHER;
 786                         break;
 787                 case SASL_NOMECH:
 788                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 789                         break;
 790                 case SASL_BADAUTH:
 791                 case SASL_NOUSER:
 792                 case SASL_TRANS:
 793                 case SASL_EXPIRED:
 794                         rc = LDAP_INVALID_CREDENTIALS;
 795                         break;
 796                 case SASL_NOAUTHZ:
 797                         rc = LDAP_INSUFFICIENT_ACCESS;
 798                         break;
 799                 case SASL_TOOWEAK:
 800                 case SASL_ENCRYPT:
 801                         rc = LDAP_INAPPROPRIATE_AUTH;
 802                         break;
 803                 case SASL_UNAVAIL:
 804                 case SASL_TRYAGAIN:
 805                         rc = LDAP_UNAVAILABLE;
 806                         break;
 807                 case SASL_DISABLED:
 808                         rc = LDAP_UNWILLING_TO_PERFORM;
 809                         break;
 810                 default:
 811                         rc = LDAP_OTHER;
 812                         break;
 813         }
 814
 815         return rc;
 816 }
 817
 818 #ifdef SLAPD_SPASSWD
 819
 820 static struct berval sasl_pwscheme = BER_BVC("{SASL}");
 821
 822 static int chk_sasl(
 823         const struct berval *sc,
 824         const struct berval * passwd,
 825         const struct berval * cred,
 826         const char **text )
 827 {
 828         unsigned int i;
 829         int rtn;
 830         void *ctx, *sconn = NULL;
 831
 832         for( i=0; i<cred->bv_len; i++) {
 833                 if(cred->bv_val[i] == '\0') {
 834                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 835                 }
 836         }
 837
 838         if( cred->bv_val[i] != '\0' ) {
 839                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 840         }
 841
 842         for( i=0; i<passwd->bv_len; i++) {
 843                 if(passwd->bv_val[i] == '\0') {
 844                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 845                 }
 846         }
 847
 848         if( passwd->bv_val[i] != '\0' ) {
 849                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 850         }
 851
 852         rtn = LUTIL_PASSWD_ERR;
 853
 854         ctx = ldap_pvt_thread_pool_context();
 855         ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sasl_bind, &sconn, NULL );
 856
 857         if( sconn != NULL ) {
 858                 int sc;
 859                 sc = sasl_checkpass( sconn,
 860                         passwd->bv_val, passwd->bv_len,
 861                         cred->bv_val, cred->bv_len );
 862                 rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 863         }
 864
 865         return rtn;
 866 }
 867 #endif /* SLAPD_SPASSWD */
 868
 869 #endif /* HAVE_CYRUS_SASL */
 870
 871 #ifdef ENABLE_REWRITE
 872
 873 typedef struct slapd_map_data {
 874         struct berval base;
 875         struct berval filter;
 876         AttributeName attrs[2];
 877         int scope;
 878 } slapd_map_data;
 879
 880 static void *
 881 slapd_rw_config( const char *fname, int lineno, int argc, char **argv )
 882 {
 883         slapd_map_data *ret = NULL;
 884         LDAPURLDesc *lud = NULL;
 885         char *uri;
 886         AttributeDescription *ad = NULL;
 887         int rc, flen = 0;
 888         struct berval dn, ndn;
 889
 890         if ( argc != 1 ) {
 891                 Debug( LDAP_DEBUG_ANY,
 892                         "[%s:%d] slapd map needs URI\n",
 893                         fname, lineno, 0 );
 894         return NULL;
 895         }
 896
 897         uri = argv[0];
 898         if ( strncasecmp( uri, "uri=", STRLENOF( "uri=" ) ) == 0 ) {
 899                 uri += STRLENOF( "uri=" );
 900         }
 901
 902         if ( ldap_url_parse( uri, &lud ) != LDAP_URL_SUCCESS ) {
 903                 Debug( LDAP_DEBUG_ANY,
 904                         "[%s:%d] illegal URI '%s'\n",
 905                         fname, lineno, uri );
 906         return NULL;
 907         }
 908
 909         if ( strcasecmp( lud->lud_scheme, "ldap" )) {
 910                 Debug( LDAP_DEBUG_ANY,
 911                         "[%s:%d] illegal URI scheme '%s'\n",
 912                         fname, lineno, lud->lud_scheme );
 913                 goto done;
 914         }
 915
 916         if (( lud->lud_host && lud->lud_host[0] ) || lud->lud_exts
 917                 || !lud->lud_dn ) {
 918                 Debug( LDAP_DEBUG_ANY,
 919                         "[%s:%d] illegal URI '%s'\n",
 920                         fname, lineno, uri );
 921                 goto done;
 922         }
 923
 924         if ( lud->lud_attrs ) {
 925                 if ( lud->lud_attrs[1] ) {
 926                         Debug( LDAP_DEBUG_ANY,
 927                                 "[%s:%d] only one attribute allowed in URI\n",
 928                                 fname, lineno, 0 );
 929                         goto done;
 930                 }
 931                 if ( strcasecmp( lud->lud_attrs[0], "dn" ) &&
 932                         strcasecmp( lud->lud_attrs[0], "entryDN" )) {
 933                         const char *text;
 934                         rc = slap_str2ad( lud->lud_attrs[0], &ad, &text );
 935                         if ( rc )
 936                                 goto done;
 937                 }
 938         }
 939         ber_str2bv( lud->lud_dn, 0, 0, &dn );
 940         if ( dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ))
 941                 goto done;
 942
 943         if ( lud->lud_filter ) {
 944                 flen = strlen( lud->lud_filter ) + 1;
 945         }
 946         ret = ch_malloc( sizeof( slapd_map_data ) + flen );
 947         ret->base = ndn;
 948         if ( flen ) {
 949                 ret->filter.bv_val = (char *)(ret+1);
 950                 ret->filter.bv_len = flen - 1;
 951                 strcpy( ret->filter.bv_val, lud->lud_filter );
 952         } else {
 953                 BER_BVZERO( &ret->filter );
 954         }
 955         ret->scope = lud->lud_scope;
 956         if ( ad ) {
 957                 ret->attrs[0].an_name = ad->ad_cname;
 958         } else {
 959                 BER_BVZERO( &ret->attrs[0].an_name );
 960         }
 961         ret->attrs[0].an_desc = ad;
 962         BER_BVZERO( &ret->attrs[1].an_name );
 963 done:
 964         ldap_free_urldesc( lud );
 965         return ret;
 966 }
 967
 968 struct slapd_rw_info {
 969         slapd_map_data *si_data;
 970         struct berval si_val;
 971 };
 972
 973 static int
 974 slapd_rw_cb( Operation *op, SlapReply *rs )
 975 {
 976         if ( rs->sr_type == REP_SEARCH ) {
 977                 struct slapd_rw_info *si = op->o_callback->sc_private;
 978
 979                 if ( si->si_data->attrs[0].an_desc ) {
 980                         Attribute *a;
 981
 982                         a = attr_find( rs->sr_entry->e_attrs,
 983                                 si->si_data->attrs[0].an_desc );
 984                         if ( a ) {
 985                                 ber_dupbv( &si->si_val, a->a_vals );
 986                         }
 987                 } else {
 988                         ber_dupbv( &si->si_val, &rs->sr_entry->e_name );
 989                 }
 990         }
 991         return LDAP_SUCCESS;
 992 }
 993
 994 static int
 995 slapd_rw_apply( void *private, const char *filter, struct berval *val )
 996 {
 997         slapd_map_data *sl = private;
 998         slap_callback cb = { NULL };
 999         Connection conn = {0};
1000         OperationBuffer opbuf;
1001         Operation *op;
1002         void *thrctx;
1003         SlapReply rs = {REP_RESULT};
1004         struct slapd_rw_info si;
1005         char *ptr;
1006         int rc;
1007
1008         thrctx = ldap_pvt_thread_pool_context();
1009         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
1010         op = &opbuf.ob_op;
1011
1012         op->o_tag = LDAP_REQ_SEARCH;
1013         op->o_req_dn = op->o_req_ndn = sl->base;
1014         op->o_bd = select_backend( &op->o_req_ndn, 1 );
1015         if ( !op->o_bd ) {
1016                 return REWRITE_ERR;
1017         }
1018         si.si_data = sl;
1019         BER_BVZERO( &si.si_val );
1020         op->ors_scope = sl->scope;
1021         op->ors_deref = LDAP_DEREF_NEVER;
1022         op->ors_slimit = 1;
1023         op->ors_tlimit = SLAP_NO_LIMIT;
1024         if ( sl->attrs[0].an_desc ) {
1025                 op->ors_attrs = sl->attrs;
1026         } else {
1027                 op->ors_attrs = slap_anlist_no_attrs;
1028         }
1029         if ( filter ) {
1030                 rc = strlen( filter );
1031         } else {
1032                 rc = 0;
1033         }
1034         rc += sl->filter.bv_len;
1035         ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( rc + 1, op->o_tmpmemctx );
1036         if ( sl->filter.bv_len ) {
1037                 ptr = lutil_strcopy( ptr, sl->filter.bv_val );
1038         } else {
1039                 *ptr = '\0';
1040         }
1041         if ( filter ) {
1042                 strcpy( ptr, filter );
1043         }
1044         op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
1045         if ( !op->ors_filter ) {
1046                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1047                 return REWRITE_ERR;
1048         }
1049
1050         op->ors_attrsonly = 0;
1051         op->o_dn = op->o_bd->be_rootdn;
1052         op->o_ndn = op->o_bd->be_rootndn;
1053         op->o_do_not_cache = 1;
1054
1055         cb.sc_response = slapd_rw_cb;
1056         cb.sc_private = &si;
1057         op->o_callback = &cb;
1058
1059         rc = op->o_bd->be_search( op, &rs );
1060         if ( rc == LDAP_SUCCESS && !BER_BVISNULL( &si.si_val )) {
1061                 *val = si.si_val;
1062                 rc = REWRITE_SUCCESS;
1063         } else {
1064                 if ( !BER_BVISNULL( &si.si_val )) {
1065                         ch_free( si.si_val.bv_val );
1066                 }
1067                 rc = REWRITE_ERR;
1068         }
1069         filter_free_x( op, op->ors_filter, 1 );
1070         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1071         return rc;
1072 }
1073
1074 static int
1075 slapd_rw_destroy( void *private )
1076 {
1077         slapd_map_data *md = private;
1078
1079         assert( private != NULL );
1080
1081         ch_free( md->base.bv_val );
1082         ch_free( md->filter.bv_val );
1083         ch_free( md );
1084
1085         return 0;
1086 }
1087
1088 static const rewrite_mapper slapd_mapper = {
1089         "slapd",
1090         slapd_rw_config,
1091         slapd_rw_apply,
1092         slapd_rw_destroy
1093 };
1094 #endif
1095
1096 int slap_sasl_init( void )
1097 {
1098 #ifdef HAVE_CYRUS_SASL
1099         int rc;
1100         static sasl_callback_t server_callbacks[] = {
1101                 { SASL_CB_LOG, &slap_sasl_log, NULL },
1102                 { SASL_CB_GETOPT, &slap_sasl_getopt, NULL },
1103                 { SASL_CB_LIST_END, NULL, NULL }
1104         };
1105 #endif
1106
1107 #ifdef ENABLE_REWRITE
1108         rewrite_mapper_register( &slapd_mapper );
1109 #endif
1110
1111 #ifdef HAVE_CYRUS_SASL
1112 #ifdef HAVE_SASL_VERSION
1113         /* stringify the version number, sasl.h doesn't do it for us */
1114 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
1115 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
1116 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
1117                                 SASL_VERSION_STEP)
1118
1119         sasl_version( NULL, &rc );
1120         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
1121                 (rc & 0xffff) < SASL_VERSION_STEP)
1122         {
1123                 char version[sizeof("xxx.xxx.xxxxx")];
1124                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
1125                         rc & 0xffff );
1126                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: SASL library version mismatch:"
1127                         " expected %s, got %s\n",
1128                         SASL_VERSION_STRING, version, 0 );
1129                 return -1;
1130         }
1131 #endif
1132
1133         sasl_set_mutex(
1134                 ldap_pvt_sasl_mutex_new,
1135                 ldap_pvt_sasl_mutex_lock,
1136                 ldap_pvt_sasl_mutex_unlock,
1137                 ldap_pvt_sasl_mutex_dispose );
1138
1139         generic_filter.f_desc = slap_schema.si_ad_objectClass;
1140
1141         rc = sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
1142         if( rc != SASL_OK ) {
1143                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: auxprop add plugin failed\n",
1144                         0, 0, 0 );
1145                 return -1;
1146         }
1147
1148         /* should provide callbacks for logging */
1149         /* server name should be configurable */
1150         rc = sasl_server_init( server_callbacks, "slapd" );
1151
1152         if( rc != SASL_OK ) {
1153                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: server init failed\n",
1154                         0, 0, 0 );
1155
1156                 return -1;
1157         }
1158
1159 #ifdef SLAPD_SPASSWD
1160         lutil_passwd_add( &sasl_pwscheme, chk_sasl, NULL );
1161 #endif
1162
1163         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1164                 0, 0, 0 );
1165
1166         /* default security properties */
1167         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1168         sasl_secprops.max_ssf = INT_MAX;
1169         sasl_secprops.maxbufsize = 65536;
1170         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1171 #endif
1172
1173         return 0;
1174 }
1175
1176 int slap_sasl_destroy( void )
1177 {
1178 #ifdef HAVE_CYRUS_SASL
1179         sasl_done();
1180 #endif
1181         free( sasl_host );
1182         sasl_host = NULL;
1183
1184         return 0;
1185 }
1186
1187 static char *
1188 slap_sasl_peer2ipport( struct berval *peer )
1189 {
1190         int             isv6 = 0;
1191         char            *ipport, *p,
1192                         *addr = &peer->bv_val[ STRLENOF( "IP=" ) ];
1193         ber_len_t       plen = peer->bv_len - STRLENOF( "IP=" );
1194
1195         /* IPv6? */
1196         if ( addr[0] == '[' ) {
1197                 isv6 = 1;
1198                 plen--;
1199         }
1200         ipport = ch_strdup( &addr[isv6] );
1201
1202         /* Convert IPv6/IPv4 addresses to address;port syntax. */
1203         p = strrchr( ipport, ':' );
1204         if ( p != NULL ) {
1205                 *p = ';';
1206                 if ( isv6 ) {
1207                         assert( p[-1] == ']' );
1208                         AC_MEMCPY( &p[-1], p, plen - ( p - ipport ) + 1 );
1209                 }
1210
1211         } else if ( isv6 ) {
1212                 /* trim ']' */
1213                 plen--;
1214                 assert( addr[plen] == ']' );
1215                 addr[plen] = '\0';
1216         }
1217
1218         return ipport;
1219 }
1220
1221 int slap_sasl_open( Connection *conn, int reopen )
1222 {
1223         int sc = LDAP_SUCCESS;
1224 #ifdef HAVE_CYRUS_SASL
1225         int cb;
1226
1227         sasl_conn_t *ctx = NULL;
1228         sasl_callback_t *session_callbacks;
1229         char *ipremoteport = NULL, *iplocalport = NULL;
1230
1231         assert( conn->c_sasl_authctx == NULL );
1232
1233         if ( !reopen ) {
1234                 assert( conn->c_sasl_extra == NULL );
1235
1236                 session_callbacks =
1237                         SLAP_CALLOC( 5, sizeof(sasl_callback_t));
1238                 if( session_callbacks == NULL ) {
1239                         Debug( LDAP_DEBUG_ANY,
1240                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1241                         return -1;
1242                 }
1243                 conn->c_sasl_extra = session_callbacks;
1244
1245                 session_callbacks[cb=0].id = SASL_CB_LOG;
1246                 session_callbacks[cb].proc = &slap_sasl_log;
1247                 session_callbacks[cb++].context = conn;
1248
1249                 session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1250                 session_callbacks[cb].proc = &slap_sasl_authorize;
1251                 session_callbacks[cb++].context = conn;
1252
1253                 session_callbacks[cb].id = SASL_CB_CANON_USER;
1254                 session_callbacks[cb].proc = &slap_sasl_canonicalize;
1255                 session_callbacks[cb++].context = conn;
1256
1257                 session_callbacks[cb].id = SASL_CB_LIST_END;
1258                 session_callbacks[cb].proc = NULL;
1259                 session_callbacks[cb++].context = NULL;
1260         } else {
1261                 session_callbacks = conn->c_sasl_extra;
1262         }
1263
1264         conn->c_sasl_layers = 0;
1265
1266         /* create new SASL context */
1267         if ( conn->c_sock_name.bv_len != 0 &&
1268                 strncmp( conn->c_sock_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1269         {
1270                 iplocalport = slap_sasl_peer2ipport( &conn->c_sock_name );
1271         }
1272
1273         if ( conn->c_peer_name.bv_len != 0 &&
1274                 strncmp( conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1275         {
1276                 ipremoteport = slap_sasl_peer2ipport( &conn->c_peer_name );
1277         }
1278
1279         sc = sasl_server_new( "ldap", sasl_host, global_realm,
1280                 iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
1281         if ( iplocalport != NULL ) {
1282                 ch_free( iplocalport );
1283         }
1284         if ( ipremoteport != NULL ) {
1285                 ch_free( ipremoteport );
1286         }
1287
1288         if( sc != SASL_OK ) {
1289                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1290                         sc, 0, 0 );
1291
1292                 return -1;
1293         }
1294
1295         conn->c_sasl_authctx = ctx;
1296
1297         if( sc == SASL_OK ) {
1298                 sc = sasl_setprop( ctx,
1299                         SASL_SEC_PROPS, &sasl_secprops );
1300
1301                 if( sc != SASL_OK ) {
1302                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1303                                 sc, 0, 0 );
1304
1305                         slap_sasl_close( conn );
1306                         return -1;
1307                 }
1308         }
1309
1310         sc = slap_sasl_err2ldap( sc );
1311
1312 #elif defined(SLAP_BUILTIN_SASL)
1313         /* built-in SASL implementation */
1314         SASL_CTX *ctx = (SASL_CTX *) SLAP_MALLOC(sizeof(SASL_CTX));
1315         if( ctx == NULL ) return -1;
1316
1317         ctx->sc_external_ssf = 0;
1318         BER_BVZERO( &ctx->sc_external_id );
1319
1320         conn->c_sasl_authctx = ctx;
1321 #endif
1322
1323         return sc;
1324 }
1325
1326 int slap_sasl_external(
1327         Connection *conn,
1328         slap_ssf_t ssf,
1329         struct berval *auth_id )
1330 {
1331 #ifdef HAVE_CYRUS_SASL
1332         int sc;
1333         sasl_conn_t *ctx = conn->c_sasl_authctx;
1334         sasl_ssf_t sasl_ssf = ssf;
1335
1336         if ( ctx == NULL ) {
1337                 return LDAP_UNAVAILABLE;
1338         }
1339
1340         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
1341
1342         if ( sc != SASL_OK ) {
1343                 return LDAP_OTHER;
1344         }
1345
1346         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL,
1347                 auth_id ? auth_id->bv_val : NULL );
1348
1349         if ( sc != SASL_OK ) {
1350                 return LDAP_OTHER;
1351         }
1352 #elif defined(SLAP_BUILTIN_SASL)
1353         /* built-in SASL implementation */
1354         SASL_CTX *ctx = conn->c_sasl_authctx;
1355         if ( ctx == NULL ) return LDAP_UNAVAILABLE;
1356
1357         ctx->sc_external_ssf = ssf;
1358         if( auth_id ) {
1359                 ctx->sc_external_id = *auth_id;
1360                 BER_BVZERO( auth_id );
1361         } else {
1362                 BER_BVZERO( &ctx->sc_external_id );
1363         }
1364 #endif
1365
1366         return LDAP_SUCCESS;
1367 }
1368
1369 int slap_sasl_reset( Connection *conn )
1370 {
1371         return LDAP_SUCCESS;
1372 }
1373
1374 char ** slap_sasl_mechs( Connection *conn )
1375 {
1376         char **mechs = NULL;
1377
1378 #ifdef HAVE_CYRUS_SASL
1379         sasl_conn_t *ctx = conn->c_sasl_authctx;
1380
1381         if( ctx == NULL ) ctx = conn->c_sasl_sockctx;
1382
1383         if( ctx != NULL ) {
1384                 int sc;
1385                 SASL_CONST char *mechstr;
1386
1387                 sc = sasl_listmech( ctx,
1388                         NULL, NULL, ",", NULL,
1389                         &mechstr, NULL, NULL );
1390
1391                 if( sc != SASL_OK ) {
1392                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1393                                 sc, 0, 0 );
1394
1395                         return NULL;
1396                 }
1397
1398                 mechs = ldap_str2charray( mechstr, "," );
1399         }
1400 #elif defined(SLAP_BUILTIN_SASL)
1401         /* builtin SASL implementation */
1402         SASL_CTX *ctx = conn->c_sasl_authctx;
1403         if ( ctx != NULL && ctx->sc_external_id.bv_val ) {
1404                 /* should check ssf */
1405                 mechs = ldap_str2charray( "EXTERNAL", "," );
1406         }
1407 #endif
1408
1409         return mechs;
1410 }
1411
1412 int slap_sasl_close( Connection *conn )
1413 {
1414 #ifdef HAVE_CYRUS_SASL
1415         sasl_conn_t *ctx = conn->c_sasl_authctx;
1416
1417         if( ctx != NULL ) {
1418                 sasl_dispose( &ctx );
1419         }
1420         if ( conn->c_sasl_sockctx &&
1421                 conn->c_sasl_authctx != conn->c_sasl_sockctx )
1422         {
1423                 ctx = conn->c_sasl_sockctx;
1424                 sasl_dispose( &ctx );
1425         }
1426
1427         conn->c_sasl_authctx = NULL;
1428         conn->c_sasl_sockctx = NULL;
1429         conn->c_sasl_done = 0;
1430
1431         free( conn->c_sasl_extra );
1432         conn->c_sasl_extra = NULL;
1433
1434 #elif defined(SLAP_BUILTIN_SASL)
1435         SASL_CTX *ctx = conn->c_sasl_authctx;
1436         if( ctx ) {
1437                 if( ctx->sc_external_id.bv_val ) {
1438                         free( ctx->sc_external_id.bv_val );
1439                         BER_BVZERO( &ctx->sc_external_id );
1440                 }
1441                 free( ctx );
1442                 conn->c_sasl_authctx = NULL;
1443         }
1444 #endif
1445
1446         return LDAP_SUCCESS;
1447 }
1448
1449 int slap_sasl_bind( Operation *op, SlapReply *rs )
1450 {
1451 #ifdef HAVE_CYRUS_SASL
1452         sasl_conn_t *ctx = op->o_conn->c_sasl_authctx;
1453         struct berval response;
1454         unsigned reslen = 0;
1455         int sc;
1456
1457         Debug(LDAP_DEBUG_ARGS,
1458                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1459                 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
1460                 op->o_conn->c_sasl_bind_in_progress ? "<continuing>" :
1461                 op->o_conn->c_sasl_bind_mech.bv_val,
1462                 op->orb_cred.bv_len );
1463
1464         if( ctx == NULL ) {
1465                 send_ldap_error( op, rs, LDAP_UNAVAILABLE,
1466                         "SASL unavailable on this session" );
1467                 return rs->sr_err;
1468         }
1469
1470 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1471         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1472 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1473         sasl_server_step( ctx, cred, clen, resp, rlen )
1474
1475         if ( !op->o_conn->c_sasl_bind_in_progress ) {
1476                 /* If we already authenticated once, must use a new context */
1477                 if ( op->o_conn->c_sasl_done ) {
1478                         sasl_ssf_t ssf = 0;
1479                         const char *authid = NULL;
1480                         sasl_getprop( ctx, SASL_SSF_EXTERNAL, (void *)&ssf );
1481                         sasl_getprop( ctx, SASL_AUTH_EXTERNAL, (void *)&authid );
1482                         if ( authid ) authid = ch_strdup( authid );
1483                         if ( ctx != op->o_conn->c_sasl_sockctx ) {
1484                                 sasl_dispose( &ctx );
1485                         }
1486                         op->o_conn->c_sasl_authctx = NULL;
1487
1488                         slap_sasl_open( op->o_conn, 1 );
1489                         ctx = op->o_conn->c_sasl_authctx;
1490                         if ( authid ) {
1491                                 sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1492                                 sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
1493                                 ch_free( (char *)authid );
1494                         }
1495                 }
1496                 sc = START( ctx,
1497                         op->o_conn->c_sasl_bind_mech.bv_val,
1498                         op->orb_cred.bv_val, op->orb_cred.bv_len,
1499                         (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1500
1501         } else {
1502                 sc = STEP( ctx,
1503                         op->orb_cred.bv_val, op->orb_cred.bv_len,
1504                         (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1505         }
1506
1507         response.bv_len = reslen;
1508
1509         if ( sc == SASL_OK ) {
1510                 sasl_ssf_t *ssf = NULL;
1511
1512                 ber_dupbv_x( &op->orb_edn, &op->o_conn->c_sasl_dn, op->o_tmpmemctx );
1513                 BER_BVZERO( &op->o_conn->c_sasl_dn );
1514                 op->o_conn->c_sasl_done = 1;
1515
1516                 rs->sr_err = LDAP_SUCCESS;
1517
1518                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1519                 op->orb_ssf = ssf ? *ssf : 0;
1520
1521                 ctx = NULL;
1522                 if( op->orb_ssf ) {
1523                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1524                         op->o_conn->c_sasl_layers++;
1525
1526                         /* If there's an old layer, set sockctx to NULL to
1527                          * tell connection_read() to wait for us to finish.
1528                          * Otherwise there is a race condition: we have to
1529                          * send the Bind response using the old security
1530                          * context and then remove it before reading any
1531                          * new messages.
1532                          */
1533                         if ( op->o_conn->c_sasl_sockctx ) {
1534                                 ctx = op->o_conn->c_sasl_sockctx;
1535                                 op->o_conn->c_sasl_sockctx = NULL;
1536                         } else {
1537                                 op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1538                         }
1539                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1540                 }
1541
1542                 /* Must send response using old security layer */
1543                 if (response.bv_len) rs->sr_sasldata = &response;
1544                 send_ldap_sasl( op, rs );
1545
1546                 /* Now dispose of the old security layer.
1547                  */
1548                 if ( ctx ) {
1549                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1550                         ldap_pvt_sasl_remove( op->o_conn->c_sb );
1551                         op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1552                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1553                         sasl_dispose( &ctx );
1554                 }
1555         } else if ( sc == SASL_CONTINUE ) {
1556                 rs->sr_err = LDAP_SASL_BIND_IN_PROGRESS,
1557                 rs->sr_text = sasl_errdetail( ctx );
1558                 rs->sr_sasldata = &response;
1559                 send_ldap_sasl( op, rs );
1560
1561         } else {
1562                 BER_BVZERO( &op->o_conn->c_sasl_dn );
1563                 rs->sr_text = sasl_errdetail( ctx );
1564                 rs->sr_err = slap_sasl_err2ldap( sc ),
1565                 send_ldap_result( op, rs );
1566         }
1567
1568         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rs->sr_err, 0, 0);
1569
1570 #elif defined(SLAP_BUILTIN_SASL)
1571         /* built-in SASL implementation */
1572         SASL_CTX *ctx = op->o_conn->c_sasl_authctx;
1573
1574         if ( ctx == NULL ) {
1575                 send_ldap_error( op, rs, LDAP_OTHER,
1576                         "Internal SASL Error" );
1577
1578         } else if ( bvmatch( &ext_bv, &op->o_conn->c_sasl_bind_mech ) ) {
1579                 /* EXTERNAL */
1580
1581                 if( op->orb_cred.bv_len ) {
1582                         rs->sr_text = "proxy authorization not support";
1583                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1584                         send_ldap_result( op, rs );
1585
1586                 } else {
1587                         op->orb_edn = ctx->sc_external_id;
1588                         rs->sr_err = LDAP_SUCCESS;
1589                         rs->sr_sasldata = NULL;
1590                         send_ldap_sasl( op, rs );
1591                 }
1592
1593         } else {
1594                 send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1595                         "requested SASL mechanism not supported" );
1596         }
1597 #else
1598         send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1599                 "SASL not supported" );
1600 #endif
1601
1602         return rs->sr_err;
1603 }
1604
1605 char* slap_sasl_secprops( const char *in )
1606 {
1607 #ifdef HAVE_CYRUS_SASL
1608         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1609
1610         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1611 #else
1612         return "SASL not supported";
1613 #endif
1614 }
1615
1616 void slap_sasl_secprops_unparse( struct berval *bv )
1617 {
1618 #ifdef HAVE_CYRUS_SASL
1619         ldap_pvt_sasl_secprops_unparse( &sasl_secprops, bv );
1620 #endif
1621 }
1622
1623 #ifdef HAVE_CYRUS_SASL
1624 int
1625 slap_sasl_setpass( Operation *op, SlapReply *rs )
1626 {
1627         struct berval id = BER_BVNULL;  /* needs to come from connection */
1628         struct berval new = BER_BVNULL;
1629         struct berval old = BER_BVNULL;
1630
1631         assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
1632
1633         rs->sr_err = sasl_getprop( op->o_conn->c_sasl_authctx, SASL_USERNAME,
1634                 (SASL_CONST void **)(char *)&id.bv_val );
1635
1636         if( rs->sr_err != SASL_OK ) {
1637                 rs->sr_text = "unable to retrieve SASL username";
1638                 rs->sr_err = LDAP_OTHER;
1639                 goto done;
1640         }
1641
1642         Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1643                 id.bv_val ? id.bv_val : "", 0, 0 );
1644
1645         rs->sr_err = slap_passwd_parse( op->ore_reqdata,
1646                 NULL, &old, &new, &rs->sr_text );
1647
1648         if( rs->sr_err != LDAP_SUCCESS ) {
1649                 goto done;
1650         }
1651
1652         if( new.bv_len == 0 ) {
1653                 slap_passwd_generate(&new);
1654
1655                 if( new.bv_len == 0 ) {
1656                         rs->sr_text = "password generation failed.";
1657                         rs->sr_err = LDAP_OTHER;
1658                         goto done;
1659                 }
1660
1661                 rs->sr_rspdata = slap_passwd_return( &new );
1662         }
1663
1664         rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx, id.bv_val,
1665                 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1666         if( rs->sr_err != SASL_OK ) {
1667                 rs->sr_text = sasl_errdetail( op->o_conn->c_sasl_authctx );
1668         }
1669         switch(rs->sr_err) {
1670                 case SASL_OK:
1671                         rs->sr_err = LDAP_SUCCESS;
1672                         break;
1673
1674                 case SASL_NOCHANGE:
1675                 case SASL_NOMECH:
1676                 case SASL_DISABLED:
1677                 case SASL_PWLOCK:
1678                 case SASL_FAIL:
1679                 case SASL_BADPARAM:
1680                 default:
1681                         rs->sr_err = LDAP_OTHER;
1682         }
1683
1684 done:
1685         return rs->sr_err;
1686 }
1687 #endif /* HAVE_CYRUS_SASL */
1688
1689 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
1690  * string returned in *dn is in its own allocated memory, and must be free'd
1691  * by the calling process.  -Mark Adamson, Carnegie Mellon
1692  *
1693  * The "dn:" prefix is no longer used anywhere inside slapd. It is only used
1694  * on strings passed in directly from SASL.  -Howard Chu, Symas Corp.
1695  */
1696
1697 #define SET_NONE        0
1698 #define SET_DN          1
1699 #define SET_U           2
1700
1701 int slap_sasl_getdn( Connection *conn, Operation *op, struct berval *id,
1702         char *user_realm, struct berval *dn, int flags )
1703 {
1704         int rc, is_dn = SET_NONE, do_norm = 1;
1705         struct berval dn2, *mech;
1706
1707         assert( conn != NULL );
1708         assert( id != NULL );
1709
1710         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: conn %lu id=%s [len=%lu]\n",
1711                 conn->c_connid,
1712                 BER_BVISNULL( id ) ? "NULL" : ( BER_BVISEMPTY( id ) ? "<empty>" : id->bv_val ),
1713                 BER_BVISNULL( id ) ? 0 : ( BER_BVISEMPTY( id ) ? 0 :
1714                                            (unsigned long) id->bv_len ) );
1715
1716         if ( !op ) {
1717                 op = conn->c_sasl_bindop;
1718         }
1719         assert( op != NULL );
1720
1721         BER_BVZERO( dn );
1722
1723         if ( !BER_BVISNULL( id ) ) {
1724                 /* Blatantly anonymous ID */
1725                 static struct berval bv_anonymous = BER_BVC( "anonymous" );
1726
1727                 if ( ber_bvstrcasecmp( id, &bv_anonymous ) == 0 ) {
1728                         return( LDAP_SUCCESS );
1729                 }
1730
1731         } else {
1732                 /* FIXME: if empty, should we stop? */
1733                 BER_BVSTR( id, "" );
1734         }
1735
1736         if ( !BER_BVISEMPTY( &conn->c_sasl_bind_mech ) ) {
1737                 mech = &conn->c_sasl_bind_mech;
1738         } else {
1739                 mech = &conn->c_authmech;
1740         }
1741
1742         /* An authcID needs to be converted to authzID form. Set the
1743          * values directly into *dn; they will be normalized later. (and
1744          * normalizing always makes a new copy.) An ID from a TLS certificate
1745          * is already normalized, so copy it and skip normalization.
1746          */
1747         if( flags & SLAP_GETDN_AUTHCID ) {
1748                 if( bvmatch( mech, &ext_bv )) {
1749                         /* EXTERNAL DNs are already normalized */
1750                         assert( !BER_BVISNULL( id ) );
1751
1752                         do_norm = 0;
1753                         is_dn = SET_DN;
1754                         ber_dupbv_x( dn, id, op->o_tmpmemctx );
1755
1756                 } else {
1757                         /* convert to u:<username> form */
1758                         is_dn = SET_U;
1759                         *dn = *id;
1760                 }
1761         }
1762
1763         if( is_dn == SET_NONE ) {
1764                 if( !strncasecmp( id->bv_val, "u:", STRLENOF( "u:" ) ) ) {
1765                         is_dn = SET_U;
1766                         dn->bv_val = id->bv_val + STRLENOF( "u:" );
1767                         dn->bv_len = id->bv_len - STRLENOF( "u:" );
1768
1769                 } else if ( !strncasecmp( id->bv_val, "dn:", STRLENOF( "dn:" ) ) ) {
1770                         is_dn = SET_DN;
1771                         dn->bv_val = id->bv_val + STRLENOF( "dn:" );
1772                         dn->bv_len = id->bv_len - STRLENOF( "dn:" );
1773                 }
1774         }
1775
1776         /* No other possibilities from here */
1777         if( is_dn == SET_NONE ) {
1778                 BER_BVZERO( dn );
1779                 return( LDAP_INAPPROPRIATE_AUTH );
1780         }
1781
1782         /* Username strings */
1783         if( is_dn == SET_U ) {
1784                 /* ITS#3419: values may need escape */
1785                 LDAPRDN         DN[ 5 ];
1786                 LDAPAVA         *RDNs[ 4 ][ 2 ];
1787                 LDAPAVA         AVAs[ 4 ];
1788                 int             irdn;
1789
1790                 irdn = 0;
1791                 DN[ irdn ] = RDNs[ irdn ];
1792                 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1793                 AVAs[ irdn ].la_attr = slap_schema.si_ad_uid->ad_cname;
1794                 AVAs[ irdn ].la_value = *dn;
1795                 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1796                 AVAs[ irdn ].la_private = NULL;
1797                 RDNs[ irdn ][ 1 ] = NULL;
1798
1799                 if ( user_realm && *user_realm ) {
1800                         irdn++;
1801                         DN[ irdn ] = RDNs[ irdn ];
1802                         RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1803                         AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1804                         ber_str2bv( user_realm, 0, 0, &AVAs[ irdn ].la_value );
1805                         AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1806                         AVAs[ irdn ].la_private = NULL;
1807                         RDNs[ irdn ][ 1 ] = NULL;
1808                 }
1809
1810                 if ( !BER_BVISNULL( mech ) ) {
1811                         irdn++;
1812                         DN[ irdn ] = RDNs[ irdn ];
1813                         RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1814                         AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1815                         AVAs[ irdn ].la_value = *mech;
1816                         AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1817                         AVAs[ irdn ].la_private = NULL;
1818                         RDNs[ irdn ][ 1 ] = NULL;
1819                 }
1820
1821                 irdn++;
1822                 DN[ irdn ] = RDNs[ irdn ];
1823                 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1824                 AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1825                 BER_BVSTR( &AVAs[ irdn ].la_value, "auth" );
1826                 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1827                 AVAs[ irdn ].la_private = NULL;
1828                 RDNs[ irdn ][ 1 ] = NULL;
1829
1830                 irdn++;
1831                 DN[ irdn ] = NULL;
1832
1833                 rc = ldap_dn2bv_x( DN, dn, LDAP_DN_FORMAT_LDAPV3,
1834                                 op->o_tmpmemctx );
1835                 if ( rc != LDAP_SUCCESS ) {
1836                         BER_BVZERO( dn );
1837                         return rc;
1838                 }
1839
1840                 Debug( LDAP_DEBUG_TRACE,
1841                         "slap_sasl_getdn: u:id converted to %s\n",
1842                         dn->bv_val, 0, 0 );
1843
1844         } else {
1845
1846                 /* Dup the DN in any case, so we don't risk
1847                  * leaks or dangling pointers later,
1848                  * and the DN value is '\0' terminated */
1849                 ber_dupbv_x( &dn2, dn, op->o_tmpmemctx );
1850                 dn->bv_val = dn2.bv_val;
1851         }
1852
1853         /* All strings are in DN form now. Normalize if needed. */
1854         if ( do_norm ) {
1855                 rc = dnNormalize( 0, NULL, NULL, dn, &dn2, op->o_tmpmemctx );
1856
1857                 /* User DNs were constructed above and must be freed now */
1858                 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
1859
1860                 if ( rc != LDAP_SUCCESS ) {
1861                         BER_BVZERO( dn );
1862                         return rc;
1863                 }
1864                 *dn = dn2;
1865         }
1866
1867         /* Run thru regexp */
1868         slap_sasl2dn( op, dn, &dn2, flags );
1869         if( !BER_BVISNULL( &dn2 ) ) {
1870                 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
1871                 *dn = dn2;
1872                 Debug( LDAP_DEBUG_TRACE,
1873                         "slap_sasl_getdn: dn:id converted to %s\n",
1874                         dn->bv_val, 0, 0 );
1875         }
1876
1877         return( LDAP_SUCCESS );
1878 }