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 1998-2007 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 # else
  39 #  include <sasl.h>
  40 # endif
  41
  42 # if SASL_VERSION_MAJOR >= 2
  43 # ifdef HAVE_SASL_SASL_H
  44 #  include <sasl/saslplug.h>
  45 # else
  46 #  include <saslplug.h>
  47 # endif
  48 #  define       SASL_CONST const
  49 # else
  50 #  define       SASL_CONST
  51 # endif
  52
  53 #define SASL_VERSION_FULL       ((SASL_VERSION_MAJOR << 16) |\
  54         (SASL_VERSION_MINOR << 8) | SASL_VERSION_STEP)
  55
  56 static sasl_security_properties_t sasl_secprops;
  57 #elif defined( SLAP_BUILTIN_SASL )
  58 /*
  59  * built-in SASL implementation
  60  *      only supports EXTERNAL
  61  */
  62 typedef struct sasl_ctx {
  63         slap_ssf_t sc_external_ssf;
  64         struct berval sc_external_id;
  65 } SASL_CTX;
  66
  67 #endif
  68
  69 #include <lutil.h>
  70
  71 static struct berval ext_bv = BER_BVC( "EXTERNAL" );
  72
  73 #ifdef HAVE_CYRUS_SASL
  74
  75 int
  76 slap_sasl_log(
  77         void *context,
  78         int priority,
  79         const char *message)
  80 {
  81         Connection *conn = context;
  82         int level;
  83         const char * label;
  84
  85         if ( message == NULL ) {
  86                 return SASL_BADPARAM;
  87         }
  88
  89         switch (priority) {
  90 #if SASL_VERSION_MAJOR >= 2
  91         case SASL_LOG_NONE:
  92                 level = LDAP_DEBUG_NONE;
  93                 label = "None";
  94                 break;
  95         case SASL_LOG_ERR:
  96                 level = LDAP_DEBUG_ANY;
  97                 label = "Error";
  98                 break;
  99         case SASL_LOG_FAIL:
 100                 level = LDAP_DEBUG_ANY;
 101                 label = "Failure";
 102                 break;
 103         case SASL_LOG_WARN:
 104                 level = LDAP_DEBUG_TRACE;
 105                 label = "Warning";
 106                 break;
 107         case SASL_LOG_NOTE:
 108                 level = LDAP_DEBUG_TRACE;
 109                 label = "Notice";
 110                 break;
 111         case SASL_LOG_DEBUG:
 112                 level = LDAP_DEBUG_TRACE;
 113                 label = "Debug";
 114                 break;
 115         case SASL_LOG_TRACE:
 116                 level = LDAP_DEBUG_TRACE;
 117                 label = "Trace";
 118                 break;
 119         case SASL_LOG_PASS:
 120                 level = LDAP_DEBUG_TRACE;
 121                 label = "Password Trace";
 122                 break;
 123 #else
 124         case SASL_LOG_ERR:
 125                 level = LDAP_DEBUG_ANY;
 126                 label = "Error";
 127                 break;
 128         case SASL_LOG_WARNING:
 129                 level = LDAP_DEBUG_TRACE;
 130                 label = "Warning";
 131                 break;
 132         case SASL_LOG_INFO:
 133                 level = LDAP_DEBUG_TRACE;
 134                 label = "Info";
 135                 break;
 136 #endif
 137         default:
 138                 return SASL_BADPARAM;
 139         }
 140
 141         Debug( level, "SASL [conn=%ld] %s: %s\n",
 142                 conn ? conn->c_connid: -1,
 143                 label, message );
 144
 145
 146         return SASL_OK;
 147 }
 148
 149
 150 #if SASL_VERSION_MAJOR >= 2
 151 static const char *slap_propnames[] = {
 152         "*slapConn", "*slapAuthcDNlen", "*slapAuthcDN",
 153         "*slapAuthzDNlen", "*slapAuthzDN", NULL };
 154
 155 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
 156 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
 157
 158 #define SLAP_SASL_PROP_CONN     0
 159 #define SLAP_SASL_PROP_AUTHCLEN 1
 160 #define SLAP_SASL_PROP_AUTHC    2
 161 #define SLAP_SASL_PROP_AUTHZLEN 3
 162 #define SLAP_SASL_PROP_AUTHZ    4
 163 #define SLAP_SASL_PROP_COUNT    5       /* Number of properties we used */
 164
 165 typedef struct lookup_info {
 166         int flags;
 167         const struct propval *list;
 168         sasl_server_params_t *sparams;
 169 } lookup_info;
 170
 171 static slap_response sasl_ap_lookup;
 172
 173 static struct berval sc_cleartext = BER_BVC("{CLEARTEXT}");
 174
 175 static int
 176 sasl_ap_lookup( Operation *op, SlapReply *rs )
 177 {
 178         BerVarray bv;
 179         AttributeDescription *ad;
 180         Attribute *a;
 181         const char *text;
 182         int rc, i;
 183         lookup_info *sl = (lookup_info *)op->o_callback->sc_private;
 184
 185         if (rs->sr_type != REP_SEARCH) return 0;
 186
 187         for( i = 0; sl->list[i].name; i++ ) {
 188                 const char *name = sl->list[i].name;
 189
 190                 if ( name[0] == '*' ) {
 191                         if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
 192                         /* Skip our private properties */
 193                         if ( !strcmp( name, slap_propnames[0] )) {
 194                                 i += SLAP_SASL_PROP_COUNT - 1;
 195                                 continue;
 196                         }
 197                         name++;
 198                 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
 199                         continue;
 200
 201                 if ( sl->list[i].values ) {
 202                         if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
 203                 }
 204                 ad = NULL;
 205                 rc = slap_str2ad( name, &ad, &text );
 206                 if ( rc != LDAP_SUCCESS ) {
 207                         Debug( LDAP_DEBUG_TRACE,
 208                                 "slap_ap_lookup: str2ad(%s): %s\n", name, text, 0 );
 209                         continue;
 210                 }
 211
 212                 /* If it's the rootdn and a rootpw was present, we already set
 213                  * it so don't override it here.
 214                  */
 215                 if ( ad == slap_schema.si_ad_userPassword && sl->list[i].values &&
 216                         be_isroot_dn( op->o_bd, &op->o_req_ndn ))
 217                         continue;
 218
 219                 a = attr_find( rs->sr_entry->e_attrs, ad );
 220                 if ( !a ) continue;
 221                 if ( ! access_allowed( op, rs->sr_entry, ad, NULL, ACL_AUTH, NULL ) ) {
 222                         continue;
 223                 }
 224                 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) ) {
 225                         sl->sparams->utils->prop_erase( sl->sparams->propctx,
 226                         sl->list[i].name );
 227                 }
 228                 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
 229                         /* ITS#3846 don't give hashed passwords to SASL */
 230                         if ( ad == slap_schema.si_ad_userPassword &&
 231                                 bv->bv_val[0] == '{' /*}*/ )
 232                         {
 233                                 if ( lutil_passwd_scheme( bv->bv_val ) ) {
 234                                         /* If it's not a recognized scheme, just assume it's
 235                                          * a cleartext password that happened to include brackets.
 236                                          *
 237                                          * If it's a recognized scheme, skip this value, unless the
 238                                          * scheme is {CLEARTEXT}. In that case, skip over the
 239                                          * scheme name and use the remainder. If there is nothing
 240                                          * past the scheme name, skip this value.
 241                                          */
 242 #ifdef SLAPD_CLEARTEXT
 243                                         if ( !ber_bvstrcasecmp( bv, &sc_cleartext ) ) {
 244                                                 struct berval cbv;
 245                                                 cbv.bv_len = bv->bv_len - sc_cleartext.bv_len;
 246                                                 if ( cbv.bv_len > 0 ) {
 247                                                         cbv.bv_val = bv->bv_val + sc_cleartext.bv_len;
 248                                                         sl->sparams->utils->prop_set( sl->sparams->propctx,
 249                                                                 sl->list[i].name, cbv.bv_val, cbv.bv_len );
 250                                                 }
 251                                         }
 252 #endif
 253                                         continue;
 254                                 }
 255                         }
 256                         sl->sparams->utils->prop_set( sl->sparams->propctx,
 257                                 sl->list[i].name, bv->bv_val, bv->bv_len );
 258                 }
 259         }
 260         return LDAP_SUCCESS;
 261 }
 262
 263 static void
 264 slap_auxprop_lookup(
 265         void *glob_context,
 266         sasl_server_params_t *sparams,
 267         unsigned flags,
 268         const char *user,
 269         unsigned ulen)
 270 {
 271         Operation op = {0};
 272         int i, doit = 0;
 273         Connection *conn = NULL;
 274         lookup_info sl;
 275
 276         sl.list = sparams->utils->prop_get( sparams->propctx );
 277         sl.sparams = sparams;
 278         sl.flags = flags;
 279
 280         /* Find our DN and conn first */
 281         for( i = 0; sl.list[i].name; i++ ) {
 282                 if ( sl.list[i].name[0] == '*' ) {
 283                         if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
 284                                 if ( sl.list[i].values && sl.list[i].values[0] )
 285                                         AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
 286                                 continue;
 287                         }
 288                         if ( flags & SASL_AUXPROP_AUTHZID ) {
 289                                 if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZLEN] )) {
 290                                         if ( sl.list[i].values && sl.list[i].values[0] )
 291                                                 AC_MEMCPY( &op.o_req_ndn.bv_len, sl.list[i].values[0],
 292                                                         sizeof( op.o_req_ndn.bv_len ) );
 293                                 } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZ] )) {
 294                                         if ( sl.list[i].values )
 295                                                 op.o_req_ndn.bv_val = (char *)sl.list[i].values[0];
 296                                         break;
 297                                 }
 298                         }
 299
 300                         if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
 301                                 if ( sl.list[i].values && sl.list[i].values[0] )
 302                                         AC_MEMCPY( &op.o_req_ndn.bv_len, sl.list[i].values[0],
 303                                                 sizeof( op.o_req_ndn.bv_len ) );
 304                         } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
 305                                 if ( sl.list[i].values ) {
 306                                         op.o_req_ndn.bv_val = (char *)sl.list[i].values[0];
 307                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 308                                                 break;
 309                                 }
 310                         }
 311                 }
 312         }
 313
 314         /* Now see what else needs to be fetched */
 315         for( i = 0; sl.list[i].name; i++ ) {
 316                 const char *name = sl.list[i].name;
 317
 318                 if ( name[0] == '*' ) {
 319                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 320                         /* Skip our private properties */
 321                         if ( !strcmp( name, slap_propnames[0] )) {
 322                                 i += SLAP_SASL_PROP_COUNT - 1;
 323                                 continue;
 324                         }
 325                         name++;
 326                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 327                         continue;
 328
 329                 if ( sl.list[i].values ) {
 330                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 331                 }
 332                 doit = 1;
 333                 break;
 334         }
 335
 336         if (doit) {
 337                 slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
 338
 339                 cb.sc_private = &sl;
 340
 341                 op.o_bd = select_backend( &op.o_req_ndn, 1 );
 342
 343                 if ( op.o_bd ) {
 344                         /* For rootdn, see if we can use the rootpw */
 345                         if ( be_isroot_dn( op.o_bd, &op.o_req_ndn ) &&
 346                                 !BER_BVISEMPTY( &op.o_bd->be_rootpw )) {
 347                                 struct berval cbv = BER_BVNULL;
 348
 349                                 /* If there's a recognized scheme, see if it's CLEARTEXT */
 350                                 if ( lutil_passwd_scheme( op.o_bd->be_rootpw.bv_val )) {
 351                                         if ( !strncasecmp( op.o_bd->be_rootpw.bv_val,
 352                                                 sc_cleartext.bv_val, sc_cleartext.bv_len )) {
 353
 354                                                 /* If it's CLEARTEXT, skip past scheme spec */
 355                                                 cbv.bv_len = op.o_bd->be_rootpw.bv_len -
 356                                                         sc_cleartext.bv_len;
 357                                                 if ( cbv.bv_len ) {
 358                                                         cbv.bv_val = op.o_bd->be_rootpw.bv_val +
 359                                                                 sc_cleartext.bv_len;
 360                                                 }
 361                                         }
 362                                 /* No scheme, use the whole value */
 363                                 } else {
 364                                         cbv = op.o_bd->be_rootpw;
 365                                 }
 366                                 if ( !BER_BVISEMPTY( &cbv )) {
 367                                         for( i = 0; sl.list[i].name; i++ ) {
 368                                                 const char *name = sl.list[i].name;
 369
 370                                                 if ( name[0] == '*' ) {
 371                                                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 372                                                                 name++;
 373                                                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 374                                                         continue;
 375
 376                                                 if ( !strcasecmp(name,"userPassword") ) {
 377                                                         sl.sparams->utils->prop_set( sl.sparams->propctx,
 378                                                                 sl.list[i].name, cbv.bv_val, cbv.bv_len );
 379                                                         break;
 380                                                 }
 381                                         }
 382                                 }
 383                         }
 384
 385                         if ( op.o_bd->be_search ) {
 386                                 SlapReply rs = {REP_RESULT};
 387                                 op.o_hdr = conn->c_sasl_bindop->o_hdr;
 388                                 op.o_tag = LDAP_REQ_SEARCH;
 389                                 op.o_dn = conn->c_ndn;
 390                                 op.o_ndn = conn->c_ndn;
 391                                 op.o_callback = &cb;
 392                                 slap_op_time( &op.o_time, &op.o_tincr );
 393                                 op.o_do_not_cache = 1;
 394                                 op.o_is_auth_check = 1;
 395                                 op.o_req_dn = op.o_req_ndn;
 396                                 op.ors_scope = LDAP_SCOPE_BASE;
 397                                 op.ors_deref = LDAP_DEREF_NEVER;
 398                                 op.ors_tlimit = SLAP_NO_LIMIT;
 399                                 op.ors_slimit = 1;
 400                                 op.ors_filter = &generic_filter;
 401                                 op.ors_filterstr = generic_filterstr;
 402                                 /* FIXME: we want all attributes, right? */
 403                                 op.ors_attrs = NULL;
 404
 405                                 op.o_bd->be_search( &op, &rs );
 406                         }
 407                 }
 408         }
 409 }
 410
 411 #if SASL_VERSION_FULL >= 0x020110
 412 static int
 413 slap_auxprop_store(
 414         void *glob_context,
 415         sasl_server_params_t *sparams,
 416         struct propctx *prctx,
 417         const char *user,
 418         unsigned ulen)
 419 {
 420         Operation op = {0};
 421         Opheader oph;
 422         SlapReply rs = {REP_RESULT};
 423         int rc, i, j;
 424         Connection *conn = NULL;
 425         const struct propval *pr;
 426         Modifications *modlist = NULL, **modtail = &modlist, *mod;
 427         slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
 428         char textbuf[SLAP_TEXT_BUFLEN];
 429         const char *text;
 430         size_t textlen = sizeof(textbuf);
 431
 432         /* just checking if we are enabled */
 433         if (!prctx) return SASL_OK;
 434
 435         if (!sparams || !user) return SASL_BADPARAM;
 436
 437         pr = sparams->utils->prop_get( sparams->propctx );
 438
 439         /* Find our DN and conn first */
 440         for( i = 0; pr[i].name; i++ ) {
 441                 if ( pr[i].name[0] == '*' ) {
 442                         if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
 443                                 if ( pr[i].values && pr[i].values[0] )
 444                                         AC_MEMCPY( &conn, pr[i].values[0], sizeof( conn ) );
 445                                 continue;
 446                         }
 447                         if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
 448                                 if ( pr[i].values && pr[i].values[0] )
 449                                         AC_MEMCPY( &op.o_req_ndn.bv_len, pr[i].values[0],
 450                                                 sizeof( op.o_req_ndn.bv_len ) );
 451                         } else if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
 452                                 if ( pr[i].values )
 453                                         op.o_req_ndn.bv_val = (char *)pr[i].values[0];
 454                         }
 455                 }
 456         }
 457         if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
 458
 459         op.o_bd = select_backend( &op.o_req_ndn, 1 );
 460
 461         if ( !op.o_bd || !op.o_bd->be_modify ) return SASL_FAIL;
 462
 463         pr = sparams->utils->prop_get( prctx );
 464         if (!pr) return SASL_BADPARAM;
 465
 466         for (i=0; pr[i].name; i++);
 467         if (!i) return SASL_BADPARAM;
 468
 469         for (i=0; pr[i].name; i++) {
 470                 mod = (Modifications *)ch_malloc( sizeof(Modifications) );
 471                 mod->sml_op = LDAP_MOD_REPLACE;
 472                 mod->sml_flags = 0;
 473                 ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
 474                 mod->sml_numvals = pr[i].nvalues;
 475                 mod->sml_values = (struct berval *)ch_malloc( (pr[i].nvalues + 1) *
 476                         sizeof(struct berval));
 477                 for (j=0; j<pr[i].nvalues; j++) {
 478                         ber_str2bv( pr[i].values[j], 0, 1, &mod->sml_values[j]);
 479                 }
 480                 BER_BVZERO( &mod->sml_values[j] );
 481                 mod->sml_nvalues = NULL;
 482                 mod->sml_desc = NULL;
 483                 *modtail = mod;
 484                 modtail = &mod->sml_next;
 485         }
 486         *modtail = NULL;
 487
 488         rc = slap_mods_check( &op, modlist, &text, textbuf, textlen, NULL );
 489
 490         if ( rc == LDAP_SUCCESS ) {
 491                 rc = slap_mods_no_user_mod_check( &op, modlist,
 492                         &text, textbuf, textlen );
 493
 494                 if ( rc == LDAP_SUCCESS ) {
 495                         if ( conn->c_sasl_bindop ) {
 496                                 op.o_hdr = conn->c_sasl_bindop->o_hdr;
 497                         } else {
 498                                 op.o_hdr = &oph;
 499                                 memset( &oph, 0, sizeof(oph) );
 500                                 operation_fake_init( conn, &op, ldap_pvt_thread_pool_context(), 0 );
 501                         }
 502                         op.o_tag = LDAP_REQ_MODIFY;
 503                         op.o_ndn = op.o_req_ndn;
 504                         op.o_callback = &cb;
 505                         slap_op_time( &op.o_time, &op.o_tincr );
 506                         op.o_do_not_cache = 1;
 507                         op.o_is_auth_check = 1;
 508                         op.o_req_dn = op.o_req_ndn;
 509                         op.orm_modlist = modlist;
 510
 511                         rc = op.o_bd->be_modify( &op, &rs );
 512                 }
 513         }
 514         slap_mods_free( modlist, 1 );
 515         return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
 516 }
 517 #endif /* SASL_VERSION_FULL >= 2.1.16 */
 518
 519 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 520         0,      /* Features */
 521         0,      /* spare */
 522         NULL,   /* glob_context */
 523         NULL,   /* auxprop_free */
 524         slap_auxprop_lookup,
 525         "slapd",        /* name */
 526 #if SASL_VERSION_FULL >= 0x020110
 527         slap_auxprop_store      /* the declaration of this member changed
 528                                  * in cyrus SASL from 2.1.15 to 2.1.16 */
 529 #else
 530         NULL
 531 #endif
 532 };
 533
 534 static int
 535 slap_auxprop_init(
 536         const sasl_utils_t *utils,
 537         int max_version,
 538         int *out_version,
 539         sasl_auxprop_plug_t **plug,
 540         const char *plugname)
 541 {
 542         if ( !out_version || !plug ) return SASL_BADPARAM;
 543
 544         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 545
 546         *out_version = SASL_AUXPROP_PLUG_VERSION;
 547         *plug = &slap_auxprop_plugin;
 548         return SASL_OK;
 549 }
 550
 551 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 552  * auxiliary property, so that we can refer to it in sasl_authorize
 553  * without interfering with anything else. Also, the SASL username
 554  * buffer is constrained to 256 characters, and our DNs could be
 555  * much longer (SLAP_LDAPDN_MAXLEN, currently set to 8192)
 556  */
 557 static int
 558 slap_sasl_canonicalize(
 559         sasl_conn_t *sconn,
 560         void *context,
 561         const char *in,
 562         unsigned inlen,
 563         unsigned flags,
 564         const char *user_realm,
 565         char *out,
 566         unsigned out_max,
 567         unsigned *out_len)
 568 {
 569         Connection *conn = (Connection *)context;
 570         struct propctx *props = sasl_auxprop_getctx( sconn );
 571         struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
 572         struct berval dn;
 573         int rc, which;
 574         const char *names[2];
 575         struct berval   bvin;
 576
 577         *out_len = 0;
 578
 579         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
 580                 conn ? conn->c_connid : -1,
 581                 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 582                 in ? in : "<empty>");
 583
 584         /* If name is too big, just truncate. We don't care, we're
 585          * using DNs, not the usernames.
 586          */
 587         if ( inlen > out_max )
 588                 inlen = out_max-1;
 589
 590         /* This is a Simple Bind using SPASSWD. That means the in-directory
 591          * userPassword of the Binding user already points at SASL, so it
 592          * cannot be used to actually satisfy a password comparison. Just
 593          * ignore it, some other mech will process it.
 594          */
 595         if ( !conn->c_sasl_bindop ||
 596                 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) goto done;
 597
 598         /* See if we need to add request, can only do it once */
 599         prop_getnames( props, slap_propnames, auxvals );
 600         if ( !auxvals[0].name )
 601                 prop_request( props, slap_propnames );
 602
 603         if ( flags & SASL_CU_AUTHID )
 604                 which = SLAP_SASL_PROP_AUTHCLEN;
 605         else
 606                 which = SLAP_SASL_PROP_AUTHZLEN;
 607
 608         /* Need to store the Connection for auxprop_lookup */
 609         if ( !auxvals[SLAP_SASL_PROP_CONN].values ) {
 610                 names[0] = slap_propnames[SLAP_SASL_PROP_CONN];
 611                 names[1] = NULL;
 612                 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
 613         }
 614
 615         /* Already been here? */
 616         if ( auxvals[which].values )
 617                 goto done;
 618
 619         /* Normally we require an authzID to have a u: or dn: prefix.
 620          * However, SASL frequently gives us an authzID that is just
 621          * an exact copy of the authcID, without a prefix. We need to
 622          * detect and allow this condition. If SASL calls canonicalize
 623          * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
 624          * But if it's broken into two calls, we need to remember the
 625          * authcID so that we can compare the authzID later. We store
 626          * the authcID temporarily in conn->c_sasl_dn. We necessarily
 627          * finish Canonicalizing before Authorizing, so there is no
 628          * conflict with slap_sasl_authorize's use of this temp var.
 629          *
 630          * The SASL EXTERNAL mech is backwards from all the other mechs,
 631          * it does authzID before the authcID. If we see that authzID
 632          * has already been done, don't do anything special with authcID.
 633          */
 634         if ( flags == SASL_CU_AUTHID && !auxvals[SLAP_SASL_PROP_AUTHZ].values ) {
 635                 conn->c_sasl_dn.bv_val = (char *) in;
 636                 conn->c_sasl_dn.bv_len = 0;
 637         } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
 638                 rc = strcmp( in, conn->c_sasl_dn.bv_val );
 639                 conn->c_sasl_dn.bv_val = NULL;
 640                 /* They were equal, no work needed */
 641                 if ( !rc ) goto done;
 642         }
 643
 644         bvin.bv_val = (char *)in;
 645         bvin.bv_len = inlen;
 646         rc = slap_sasl_getdn( conn, NULL, &bvin, (char *)user_realm, &dn,
 647                 (flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
 648         if ( rc != LDAP_SUCCESS ) {
 649                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 650                 return SASL_NOAUTHZ;
 651         }
 652
 653         names[0] = slap_propnames[which];
 654         names[1] = NULL;
 655         prop_set( props, names[0], (char *)&dn.bv_len, sizeof( dn.bv_len ) );
 656
 657         which++;
 658         names[0] = slap_propnames[which];
 659         prop_set( props, names[0], dn.bv_val, dn.bv_len );
 660
 661         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
 662                 conn ? conn->c_connid : -1, names[0]+1,
 663                 dn.bv_val ? dn.bv_val : "<EMPTY>" );
 664
 665         /* Not needed any more, SASL has copied it */
 666         if ( conn && conn->c_sasl_bindop )
 667                 conn->c_sasl_bindop->o_tmpfree( dn.bv_val, conn->c_sasl_bindop->o_tmpmemctx );
 668
 669 done:
 670         AC_MEMCPY( out, in, inlen );
 671         out[inlen] = '\0';
 672
 673         *out_len = inlen;
 674
 675         return SASL_OK;
 676 }
 677
 678 static int
 679 slap_sasl_authorize(
 680         sasl_conn_t *sconn,
 681         void *context,
 682         char *requested_user,
 683         unsigned rlen,
 684         char *auth_identity,
 685         unsigned alen,
 686         const char *def_realm,
 687         unsigned urlen,
 688         struct propctx *props)
 689 {
 690         Connection *conn = (Connection *)context;
 691         /* actually:
 692          *      (SLAP_SASL_PROP_COUNT - 1)      because we skip "conn",
 693          *      + 1                             for NULL termination?
 694          */
 695         struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
 696         struct berval authcDN, authzDN = BER_BVNULL;
 697         int rc;
 698
 699         /* Simple Binds don't support proxy authorization, ignore it */
 700         if ( !conn->c_sasl_bindop ||
 701                 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) return SASL_OK;
 702
 703         Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
 704                 "authcid=\"%s\" authzid=\"%s\"\n",
 705                 conn ? conn->c_connid : -1, auth_identity, requested_user );
 706         if ( conn->c_sasl_dn.bv_val ) {
 707                 BER_BVZERO( &conn->c_sasl_dn );
 708         }
 709
 710         /* Skip SLAP_SASL_PROP_CONN */
 711         prop_getnames( props, slap_propnames+1, auxvals );
 712
 713         /* Should not happen */
 714         if ( !auxvals[0].values ) {
 715                 sasl_seterror( sconn, 0, "invalid authcid" );
 716                 return SASL_NOAUTHZ;
 717         }
 718
 719         AC_MEMCPY( &authcDN.bv_len, auxvals[0].values[0], sizeof(authcDN.bv_len) );
 720         authcDN.bv_val = auxvals[1].values ? (char *)auxvals[1].values[0] : NULL;
 721         conn->c_sasl_dn = authcDN;
 722
 723         /* Nothing to do if no authzID was given */
 724         if ( !auxvals[2].name || !auxvals[2].values ) {
 725                 goto ok;
 726         }
 727
 728         AC_MEMCPY( &authzDN.bv_len, auxvals[2].values[0], sizeof(authzDN.bv_len) );
 729         authzDN.bv_val = auxvals[3].values ? (char *)auxvals[3].values[0] : NULL;
 730
 731         rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
 732         if ( rc != LDAP_SUCCESS ) {
 733                 Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
 734                         "proxy authorization disallowed (%d)\n",
 735                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 736
 737                 sasl_seterror( sconn, 0, "not authorized" );
 738                 return SASL_NOAUTHZ;
 739         }
 740
 741         /* FIXME: we need yet another dup because slap_sasl_getdn()
 742          * is using the bind operation slab */
 743         ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
 744
 745 ok:
 746         if (conn->c_sasl_bindop) {
 747                 Statslog( LDAP_DEBUG_STATS,
 748                         "%s BIND authcid=\"%s\" authzid=\"%s\"\n",
 749                         conn->c_sasl_bindop->o_log_prefix,
 750                         auth_identity, requested_user, 0, 0 );
 751         }
 752
 753         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 754                 " proxy authorization allowed authzDN=\"%s\"\n",
 755                 (long) (conn ? conn->c_connid : -1),
 756                 authzDN.bv_val ? authzDN.bv_val : "", 0 );
 757         return SASL_OK;
 758 }
 759 #else
 760 static int
 761 slap_sasl_authorize(
 762         void *context,
 763         char *authcid,
 764         char *authzid,
 765         const char **user,
 766         const char **errstr)
 767 {
 768         struct berval authcDN, authzDN = BER_BVNULL;
 769         int rc;
 770         Connection *conn = context;
 771         char *realm;
 772         struct berval   bvauthcid, bvauthzid;
 773
 774         *user = NULL;
 775         if ( conn->c_sasl_dn.bv_val ) {
 776                 ch_free( conn->c_sasl_dn.bv_val );
 777                 BER_BVZERO( &conn->c_sasl_dn );
 778         }
 779
 780         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 781                 "authcid=\"%s\" authzid=\"%s\"\n",
 782                 (long) (conn ? conn->c_connid : -1),
 783                 authcid ? authcid : "<empty>",
 784                 authzid ? authzid : "<empty>" );
 785
 786         /* Figure out how much data we have for the dn */
 787         rc = sasl_getprop( conn->c_sasl_authctx, SASL_REALM, (void **)&realm );
 788         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 789                 Debug(LDAP_DEBUG_TRACE,
 790                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 791                 *errstr = "Could not extract realm";
 792                 return SASL_NOAUTHZ;
 793         }
 794
 795         /* Convert the identities to DN's. If no authzid was given, client will
 796            be bound as the DN matching their username */
 797         bvauthcid.bv_val = authcid;
 798         bvauthcid.bv_len = authcid ? strlen( authcid ) : 0;
 799         rc = slap_sasl_getdn( conn, NULL, &bvauthcid, realm,
 800                 &authcDN, SLAP_GETDN_AUTHCID );
 801         if( rc != LDAP_SUCCESS ) {
 802                 *errstr = ldap_err2string( rc );
 803                 return SASL_NOAUTHZ;
 804         }
 805         conn->c_sasl_dn = authcDN;
 806         if( ( authzid == NULL ) || !strcmp( authcid, authzid ) ) {
 807                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 808                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 809
 810                 goto ok;
 811         }
 812
 813         bvauthzid.bv_val = authzid;
 814         bvauthzid.bv_len = authzid ? strlen( authzid ) : 0;
 815         rc = slap_sasl_getdn( conn, NULL, &bvauthzid, realm,
 816                 &authzDN, SLAP_GETDN_AUTHZID );
 817         if( rc != LDAP_SUCCESS ) {
 818                 *errstr = ldap_err2string( rc );
 819                 return SASL_NOAUTHZ;
 820         }
 821
 822         rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
 823         if( rc ) {
 824                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 825                         "proxy authorization disallowed (%d)\n",
 826                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 827
 828                 *errstr = "not authorized";
 829                 ch_free( authzDN.bv_val );
 830                 return SASL_NOAUTHZ;
 831         }
 832
 833         /* FIXME: we need yet another dup because slap_sasl_getdn()
 834          * is using the bind operation slab */
 835         if ( conn->c_sasl_bindop ) {
 836                 ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
 837                 slap_sl_free( authzDN.bv_val,
 838                                 conn->c_sasl_bindop->o_tmpmemctx );
 839
 840         } else {
 841                 conn->c_sasl_authz_dn = authzDN;
 842         }
 843
 844 ok:
 845         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 846                 " authorization allowed authzDN=\"%s\"\n",
 847                 (long) (conn ? conn->c_connid : -1),
 848                 authzDN.bv_val ? authzDN.bv_val : "", 0 );
 849
 850         if ( conn->c_sasl_bindop ) {
 851                 Statslog( LDAP_DEBUG_STATS,
 852                         "%s BIND authcid=\"%s\" authzid=\"%s\"\n",
 853                         conn->c_sasl_bindop->o_log_prefix,
 854                         authcid, authzid ? authzid : "", 0, 0 );
 855         }
 856
 857         *errstr = NULL;
 858         return SASL_OK;
 859 }
 860 #endif /* SASL_VERSION_MAJOR >= 2 */
 861
 862 static int
 863 slap_sasl_err2ldap( int saslerr )
 864 {
 865         int rc;
 866
 867         /* map SASL errors to LDAP resultCode returned by:
 868          *      sasl_server_new()
 869          *              SASL_OK, SASL_NOMEM
 870          *      sasl_server_step()
 871          *              SASL_OK, SASL_CONTINUE, SASL_TRANS, SASL_BADPARAM, SASL_BADPROT,
 872          *      ...
 873          *      sasl_server_start()
 874          *      + SASL_NOMECH
 875          *      sasl_setprop()
 876          *              SASL_OK, SASL_BADPARAM
 877          */
 878
 879         switch (saslerr) {
 880                 case SASL_OK:
 881                         rc = LDAP_SUCCESS;
 882                         break;
 883                 case SASL_CONTINUE:
 884                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 885                         break;
 886                 case SASL_FAIL:
 887                 case SASL_NOMEM:
 888                         rc = LDAP_OTHER;
 889                         break;
 890                 case SASL_NOMECH:
 891                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 892                         break;
 893                 case SASL_BADAUTH:
 894                 case SASL_NOUSER:
 895                 case SASL_TRANS:
 896                 case SASL_EXPIRED:
 897                         rc = LDAP_INVALID_CREDENTIALS;
 898                         break;
 899                 case SASL_NOAUTHZ:
 900                         rc = LDAP_INSUFFICIENT_ACCESS;
 901                         break;
 902                 case SASL_TOOWEAK:
 903                 case SASL_ENCRYPT:
 904                         rc = LDAP_INAPPROPRIATE_AUTH;
 905                         break;
 906                 case SASL_UNAVAIL:
 907                 case SASL_TRYAGAIN:
 908                         rc = LDAP_UNAVAILABLE;
 909                         break;
 910                 case SASL_DISABLED:
 911                         rc = LDAP_UNWILLING_TO_PERFORM;
 912                         break;
 913                 default:
 914                         rc = LDAP_OTHER;
 915                         break;
 916         }
 917
 918         return rc;
 919 }
 920
 921 #ifdef SLAPD_SPASSWD
 922
 923 static struct berval sasl_pwscheme = BER_BVC("{SASL}");
 924
 925 static int chk_sasl(
 926         const struct berval *sc,
 927         const struct berval * passwd,
 928         const struct berval * cred,
 929         const char **text )
 930 {
 931         unsigned int i;
 932         int rtn;
 933         void *ctx, *sconn = NULL;
 934
 935         for( i=0; i<cred->bv_len; i++) {
 936                 if(cred->bv_val[i] == '\0') {
 937                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 938                 }
 939         }
 940
 941         if( cred->bv_val[i] != '\0' ) {
 942                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 943         }
 944
 945         for( i=0; i<passwd->bv_len; i++) {
 946                 if(passwd->bv_val[i] == '\0') {
 947                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 948                 }
 949         }
 950
 951         if( passwd->bv_val[i] != '\0' ) {
 952                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 953         }
 954
 955         rtn = LUTIL_PASSWD_ERR;
 956
 957         ctx = ldap_pvt_thread_pool_context();
 958         ldap_pvt_thread_pool_getkey( ctx, slap_sasl_bind, &sconn, NULL );
 959
 960         if( sconn != NULL ) {
 961                 int sc;
 962 # if SASL_VERSION_MAJOR < 2
 963                 sc = sasl_checkpass( sconn,
 964                         passwd->bv_val, passwd->bv_len,
 965                         cred->bv_val, cred->bv_len,
 966                         text );
 967 # else
 968                 sc = sasl_checkpass( sconn,
 969                         passwd->bv_val, passwd->bv_len,
 970                         cred->bv_val, cred->bv_len );
 971 # endif
 972                 rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 973         }
 974
 975         return rtn;
 976 }
 977 #endif /* SLAPD_SPASSWD */
 978
 979 #endif /* HAVE_CYRUS_SASL */
 980
 981 #ifdef ENABLE_REWRITE
 982
 983 typedef struct slapd_map_data {
 984         struct berval base;
 985         struct berval filter;
 986         AttributeName attrs[2];
 987         int scope;
 988 } slapd_map_data;
 989
 990 static void *
 991 slapd_rw_config( const char *fname, int lineno, int argc, char **argv )
 992 {
 993         slapd_map_data *ret = NULL;
 994         LDAPURLDesc *lud = NULL;
 995         char *uri;
 996         AttributeDescription *ad = NULL;
 997         int rc, flen = 0;
 998         struct berval dn, ndn;
 999
1000         if ( argc != 1 ) {
1001                 Debug( LDAP_DEBUG_ANY,
1002                         "[%s:%d] slapd map needs URI\n",
1003                         fname, lineno, 0 );
1004         return NULL;
1005         }
1006
1007         uri = argv[0];
1008         if ( strncasecmp( uri, "uri=", STRLENOF( "uri=" ) ) == 0 ) {
1009                 uri += STRLENOF( "uri=" );
1010         }
1011
1012         if ( ldap_url_parse( uri, &lud ) != LDAP_URL_SUCCESS ) {
1013                 Debug( LDAP_DEBUG_ANY,
1014                         "[%s:%d] illegal URI '%s'\n",
1015                         fname, lineno, uri );
1016         return NULL;
1017         }
1018
1019         if ( strcasecmp( lud->lud_scheme, "ldap" )) {
1020                 Debug( LDAP_DEBUG_ANY,
1021                         "[%s:%d] illegal URI scheme '%s'\n",
1022                         fname, lineno, lud->lud_scheme );
1023                 goto done;
1024         }
1025
1026         if (( lud->lud_host && lud->lud_host[0] ) || lud->lud_exts
1027                 || !lud->lud_dn ) {
1028                 Debug( LDAP_DEBUG_ANY,
1029                         "[%s:%d] illegal URI '%s'\n",
1030                         fname, lineno, uri );
1031                 goto done;
1032         }
1033
1034         if ( lud->lud_attrs ) {
1035                 if ( lud->lud_attrs[1] ) {
1036                         Debug( LDAP_DEBUG_ANY,
1037                                 "[%s:%d] only one attribute allowed in URI\n",
1038                                 fname, lineno, 0 );
1039                         goto done;
1040                 }
1041                 if ( strcasecmp( lud->lud_attrs[0], "dn" ) &&
1042                         strcasecmp( lud->lud_attrs[0], "entryDN" )) {
1043                         const char *text;
1044                         rc = slap_str2ad( lud->lud_attrs[0], &ad, &text );
1045                         if ( rc )
1046                                 goto done;
1047                 }
1048         }
1049         ber_str2bv( lud->lud_dn, 0, 0, &dn );
1050         if ( dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ))
1051                 goto done;
1052
1053         if ( lud->lud_filter ) {
1054                 flen = strlen( lud->lud_filter ) + 1;
1055         }
1056         ret = ch_malloc( sizeof( slapd_map_data ) + flen );
1057         ret->base = ndn;
1058         if ( flen ) {
1059                 ret->filter.bv_val = (char *)(ret+1);
1060                 ret->filter.bv_len = flen - 1;
1061                 strcpy( ret->filter.bv_val, lud->lud_filter );
1062         } else {
1063                 BER_BVZERO( &ret->filter );
1064         }
1065         ret->scope = lud->lud_scope;
1066         if ( ad ) {
1067                 ret->attrs[0].an_name = ad->ad_cname;
1068         } else {
1069                 BER_BVZERO( &ret->attrs[0].an_name );
1070         }
1071         ret->attrs[0].an_desc = ad;
1072         BER_BVZERO( &ret->attrs[1].an_name );
1073 done:
1074         ldap_free_urldesc( lud );
1075         return ret;
1076 }
1077
1078 struct slapd_rw_info {
1079         slapd_map_data *si_data;
1080         struct berval si_val;
1081 };
1082
1083 static int
1084 slapd_rw_cb( Operation *op, SlapReply *rs )
1085 {
1086         if ( rs->sr_type == REP_SEARCH ) {
1087                 struct slapd_rw_info *si = op->o_callback->sc_private;
1088
1089                 if ( si->si_data->attrs[0].an_desc ) {
1090                         Attribute *a;
1091
1092                         a = attr_find( rs->sr_entry->e_attrs,
1093                                 si->si_data->attrs[0].an_desc );
1094                         if ( a ) {
1095                                 ber_dupbv( &si->si_val, a->a_vals );
1096                         }
1097                 } else {
1098                         ber_dupbv( &si->si_val, &rs->sr_entry->e_name );
1099                 }
1100         }
1101         return LDAP_SUCCESS;
1102 }
1103
1104 static int
1105 slapd_rw_apply( void *private, const char *filter, struct berval *val )
1106 {
1107         slapd_map_data *sl = private;
1108         slap_callback cb = { NULL };
1109         Connection conn = {0};
1110         OperationBuffer opbuf;
1111         Operation *op;
1112         void *thrctx;
1113         SlapReply rs = {REP_RESULT};
1114         struct slapd_rw_info si;
1115         char *ptr;
1116         int rc;
1117
1118         thrctx = ldap_pvt_thread_pool_context();
1119         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
1120         op = &opbuf.ob_op;
1121
1122         op->o_tag = LDAP_REQ_SEARCH;
1123         op->o_req_dn = op->o_req_ndn = sl->base;
1124         op->o_bd = select_backend( &op->o_req_ndn, 1 );
1125         if ( !op->o_bd ) {
1126                 return REWRITE_ERR;
1127         }
1128         si.si_data = sl;
1129         BER_BVZERO( &si.si_val );
1130         op->ors_scope = sl->scope;
1131         op->ors_deref = LDAP_DEREF_NEVER;
1132         op->ors_slimit = 1;
1133         op->ors_tlimit = SLAP_NO_LIMIT;
1134         if ( sl->attrs[0].an_desc ) {
1135                 op->ors_attrs = sl->attrs;
1136         } else {
1137                 op->ors_attrs = slap_anlist_no_attrs;
1138         }
1139         if ( filter ) {
1140                 rc = strlen( filter );
1141         } else {
1142                 rc = 0;
1143         }
1144         rc += sl->filter.bv_len;
1145         ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( rc + 1, op->o_tmpmemctx );
1146         if ( sl->filter.bv_len ) {
1147                 ptr = lutil_strcopy( ptr, sl->filter.bv_val );
1148         } else {
1149                 *ptr = '\0';
1150         }
1151         if ( filter ) {
1152                 strcpy( ptr, filter );
1153         }
1154         op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
1155         if ( !op->ors_filter ) {
1156                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1157                 return REWRITE_ERR;
1158         }
1159
1160         op->ors_attrsonly = 0;
1161         op->o_dn = op->o_bd->be_rootdn;
1162         op->o_ndn = op->o_bd->be_rootndn;
1163         op->o_do_not_cache = 1;
1164
1165         cb.sc_response = slapd_rw_cb;
1166         cb.sc_private = &si;
1167         op->o_callback = &cb;
1168
1169         rc = op->o_bd->be_search( op, &rs );
1170         if ( rc == LDAP_SUCCESS && !BER_BVISNULL( &si.si_val )) {
1171                 *val = si.si_val;
1172                 rc = REWRITE_SUCCESS;
1173         } else {
1174                 if ( !BER_BVISNULL( &si.si_val )) {
1175                         ch_free( si.si_val.bv_val );
1176                 }
1177                 rc = REWRITE_ERR;
1178         }
1179         filter_free_x( op, op->ors_filter );
1180         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1181         return rc;
1182 }
1183
1184 static int
1185 slapd_rw_destroy( void *private )
1186 {
1187         slapd_map_data *md = private;
1188
1189         assert( private != NULL );
1190
1191         ch_free( md->base.bv_val );
1192         ch_free( md->filter.bv_val );
1193         ch_free( md );
1194
1195         return 0;
1196 }
1197
1198 static const rewrite_mapper slapd_mapper = {
1199         "slapd",
1200         slapd_rw_config,
1201         slapd_rw_apply,
1202         slapd_rw_destroy
1203 };
1204 #endif
1205
1206 int slap_sasl_init( void )
1207 {
1208 #ifdef HAVE_CYRUS_SASL
1209         int rc;
1210         static sasl_callback_t server_callbacks[] = {
1211                 { SASL_CB_LOG, &slap_sasl_log, NULL },
1212                 { SASL_CB_LIST_END, NULL, NULL }
1213         };
1214 #endif
1215
1216 #ifdef ENABLE_REWRITE
1217         rewrite_mapper_register( &slapd_mapper );
1218 #endif
1219
1220 #ifdef HAVE_CYRUS_SASL
1221 #ifdef HAVE_SASL_VERSION
1222         /* stringify the version number, sasl.h doesn't do it for us */
1223 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
1224 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
1225 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
1226                                 SASL_VERSION_STEP)
1227
1228         sasl_version( NULL, &rc );
1229         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
1230                 (rc & 0xffff) < SASL_VERSION_STEP)
1231         {
1232                 char version[sizeof("xxx.xxx.xxxxx")];
1233                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
1234                         rc & 0xffff );
1235                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: SASL library version mismatch:"
1236                         " expected %s, got %s\n",
1237                         SASL_VERSION_STRING, version, 0 );
1238                 return -1;
1239         }
1240 #endif
1241
1242         /* SASL 2 does its own memory management internally */
1243 #if SASL_VERSION_MAJOR < 2
1244         sasl_set_alloc(
1245                 ber_memalloc,
1246                 ber_memcalloc,
1247                 ber_memrealloc,
1248                 ber_memfree );
1249 #endif
1250
1251         sasl_set_mutex(
1252                 ldap_pvt_sasl_mutex_new,
1253                 ldap_pvt_sasl_mutex_lock,
1254                 ldap_pvt_sasl_mutex_unlock,
1255                 ldap_pvt_sasl_mutex_dispose );
1256
1257 #if SASL_VERSION_MAJOR >= 2
1258         generic_filter.f_desc = slap_schema.si_ad_objectClass;
1259
1260         rc = sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
1261         if( rc != SASL_OK ) {
1262                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: auxprop add plugin failed\n",
1263                         0, 0, 0 );
1264                 return -1;
1265         }
1266 #endif
1267         /* should provide callbacks for logging */
1268         /* server name should be configurable */
1269         rc = sasl_server_init( server_callbacks, "slapd" );
1270
1271         if( rc != SASL_OK ) {
1272                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: server init failed\n",
1273                         0, 0, 0 );
1274 #if SASL_VERSION_MAJOR < 2
1275                 /* A no-op used to make sure we linked with Cyrus 1.5 */
1276                 sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
1277 #endif
1278
1279                 return -1;
1280         }
1281
1282 #ifdef SLAPD_SPASSWD
1283         lutil_passwd_add( &sasl_pwscheme, chk_sasl, NULL );
1284 #endif
1285
1286         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1287                 0, 0, 0 );
1288
1289         /* default security properties */
1290         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1291         sasl_secprops.max_ssf = INT_MAX;
1292         sasl_secprops.maxbufsize = 65536;
1293         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1294 #endif
1295
1296         return 0;
1297 }
1298
1299 int slap_sasl_destroy( void )
1300 {
1301 #ifdef HAVE_CYRUS_SASL
1302         sasl_done();
1303 #endif
1304         free( sasl_host );
1305         sasl_host = NULL;
1306
1307         return 0;
1308 }
1309
1310 #if SASL_VERSION_MAJOR >= 2
1311 static char *
1312 slap_sasl_peer2ipport( struct berval *peer )
1313 {
1314         int             isv6 = 0;
1315         char            *ipport, *p,
1316                         *addr = &peer->bv_val[ STRLENOF( "IP=" ) ];
1317         ber_len_t       plen = peer->bv_len - STRLENOF( "IP=" );
1318
1319         /* IPv6? */
1320         if ( addr[0] == '[' ) {
1321                 isv6 = 1;
1322                 plen--;
1323         }
1324         ipport = ch_strdup( &addr[isv6] );
1325
1326         /* Convert IPv6/IPv4 addresses to address;port syntax. */
1327         p = strrchr( ipport, ':' );
1328         if ( p != NULL ) {
1329                 *p = ';';
1330                 if ( isv6 ) {
1331                         assert( p[-1] == ']' );
1332                         AC_MEMCPY( &p[-1], p, plen - ( p - ipport ) + 1 );
1333                 }
1334
1335         } else if ( isv6 ) {
1336                 /* trim ']' */
1337                 plen--;
1338                 assert( addr[plen] == ']' );
1339                 addr[plen] = '\0';
1340         }
1341
1342         return ipport;
1343 }
1344 #endif
1345
1346 int slap_sasl_open( Connection *conn, int reopen )
1347 {
1348         int sc = LDAP_SUCCESS;
1349 #ifdef HAVE_CYRUS_SASL
1350         int cb;
1351
1352         sasl_conn_t *ctx = NULL;
1353         sasl_callback_t *session_callbacks;
1354
1355 #if SASL_VERSION_MAJOR >= 2
1356         char *ipremoteport = NULL, *iplocalport = NULL;
1357 #endif
1358
1359         assert( conn->c_sasl_authctx == NULL );
1360
1361         if ( !reopen ) {
1362                 assert( conn->c_sasl_extra == NULL );
1363
1364                 session_callbacks =
1365 #if SASL_VERSION_MAJOR >= 2
1366                         SLAP_CALLOC( 5, sizeof(sasl_callback_t));
1367 #else
1368                         SLAP_CALLOC( 3, sizeof(sasl_callback_t));
1369 #endif
1370                 if( session_callbacks == NULL ) {
1371                         Debug( LDAP_DEBUG_ANY,
1372                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1373                         return -1;
1374                 }
1375                 conn->c_sasl_extra = session_callbacks;
1376
1377                 session_callbacks[cb=0].id = SASL_CB_LOG;
1378                 session_callbacks[cb].proc = &slap_sasl_log;
1379                 session_callbacks[cb++].context = conn;
1380
1381                 session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1382                 session_callbacks[cb].proc = &slap_sasl_authorize;
1383                 session_callbacks[cb++].context = conn;
1384
1385 #if SASL_VERSION_MAJOR >= 2
1386                 session_callbacks[cb].id = SASL_CB_CANON_USER;
1387                 session_callbacks[cb].proc = &slap_sasl_canonicalize;
1388                 session_callbacks[cb++].context = conn;
1389 #endif
1390
1391                 session_callbacks[cb].id = SASL_CB_LIST_END;
1392                 session_callbacks[cb].proc = NULL;
1393                 session_callbacks[cb++].context = NULL;
1394         } else {
1395                 session_callbacks = conn->c_sasl_extra;
1396         }
1397
1398         conn->c_sasl_layers = 0;
1399
1400         /* create new SASL context */
1401 #if SASL_VERSION_MAJOR >= 2
1402         if ( conn->c_sock_name.bv_len != 0 &&
1403                 strncmp( conn->c_sock_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1404         {
1405                 iplocalport = slap_sasl_peer2ipport( &conn->c_sock_name );
1406         }
1407
1408         if ( conn->c_peer_name.bv_len != 0 &&
1409                 strncmp( conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1410         {
1411                 ipremoteport = slap_sasl_peer2ipport( &conn->c_peer_name );
1412         }
1413
1414         sc = sasl_server_new( "ldap", sasl_host, global_realm,
1415                 iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
1416         if ( iplocalport != NULL ) {
1417                 ch_free( iplocalport );
1418         }
1419         if ( ipremoteport != NULL ) {
1420                 ch_free( ipremoteport );
1421         }
1422 #else
1423         sc = sasl_server_new( "ldap", sasl_host, global_realm,
1424                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
1425 #endif
1426
1427         if( sc != SASL_OK ) {
1428                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1429                         sc, 0, 0 );
1430
1431                 return -1;
1432         }
1433
1434         conn->c_sasl_authctx = ctx;
1435
1436         if( sc == SASL_OK ) {
1437                 sc = sasl_setprop( ctx,
1438                         SASL_SEC_PROPS, &sasl_secprops );
1439
1440                 if( sc != SASL_OK ) {
1441                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1442                                 sc, 0, 0 );
1443
1444                         slap_sasl_close( conn );
1445                         return -1;
1446                 }
1447         }
1448
1449         sc = slap_sasl_err2ldap( sc );
1450
1451 #elif defined(SLAP_BUILTIN_SASL)
1452         /* built-in SASL implementation */
1453         SASL_CTX *ctx = (SASL_CTX *) SLAP_MALLOC(sizeof(SASL_CTX));
1454         if( ctx == NULL ) return -1;
1455
1456         ctx->sc_external_ssf = 0;
1457         BER_BVZERO( &ctx->sc_external_id );
1458
1459         conn->c_sasl_authctx = ctx;
1460 #endif
1461
1462         return sc;
1463 }
1464
1465 int slap_sasl_external(
1466         Connection *conn,
1467         slap_ssf_t ssf,
1468         struct berval *auth_id )
1469 {
1470 #if SASL_VERSION_MAJOR >= 2
1471         int sc;
1472         sasl_conn_t *ctx = conn->c_sasl_authctx;
1473         sasl_ssf_t sasl_ssf = ssf;
1474
1475         if ( ctx == NULL ) {
1476                 return LDAP_UNAVAILABLE;
1477         }
1478
1479         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
1480
1481         if ( sc != SASL_OK ) {
1482                 return LDAP_OTHER;
1483         }
1484
1485         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL,
1486                 auth_id ? auth_id->bv_val : NULL );
1487
1488         if ( sc != SASL_OK ) {
1489                 return LDAP_OTHER;
1490         }
1491
1492 #elif defined(HAVE_CYRUS_SASL)
1493         int sc;
1494         sasl_conn_t *ctx = conn->c_sasl_authctx;
1495         sasl_external_properties_t extprops;
1496
1497         if ( ctx == NULL ) {
1498                 return LDAP_UNAVAILABLE;
1499         }
1500
1501         memset( &extprops, '\0', sizeof(extprops) );
1502         extprops.ssf = ssf;
1503         extprops.auth_id = auth_id ? auth_id->bv_val : NULL;
1504
1505         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1506                 (void *) &extprops );
1507
1508         if ( sc != SASL_OK ) {
1509                 return LDAP_OTHER;
1510         }
1511 #elif defined(SLAP_BUILTIN_SASL)
1512         /* built-in SASL implementation */
1513         SASL_CTX *ctx = conn->c_sasl_authctx;
1514         if ( ctx == NULL ) return LDAP_UNAVAILABLE;
1515
1516         ctx->sc_external_ssf = ssf;
1517         if( auth_id ) {
1518                 ctx->sc_external_id = *auth_id;
1519                 BER_BVZERO( auth_id );
1520         } else {
1521                 BER_BVZERO( &ctx->sc_external_id );
1522         }
1523 #endif
1524
1525         return LDAP_SUCCESS;
1526 }
1527
1528 int slap_sasl_reset( Connection *conn )
1529 {
1530         return LDAP_SUCCESS;
1531 }
1532
1533 char ** slap_sasl_mechs( Connection *conn )
1534 {
1535         char **mechs = NULL;
1536
1537 #ifdef HAVE_CYRUS_SASL
1538         sasl_conn_t *ctx = conn->c_sasl_authctx;
1539
1540         if( ctx == NULL ) ctx = conn->c_sasl_sockctx;
1541
1542         if( ctx != NULL ) {
1543                 int sc;
1544                 SASL_CONST char *mechstr;
1545
1546                 sc = sasl_listmech( ctx,
1547                         NULL, NULL, ",", NULL,
1548                         &mechstr, NULL, NULL );
1549
1550                 if( sc != SASL_OK ) {
1551                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1552                                 sc, 0, 0 );
1553
1554                         return NULL;
1555                 }
1556
1557                 mechs = ldap_str2charray( mechstr, "," );
1558
1559 #if SASL_VERSION_MAJOR < 2
1560                 ch_free( mechstr );
1561 #endif
1562         }
1563 #elif defined(SLAP_BUILTIN_SASL)
1564         /* builtin SASL implementation */
1565         SASL_CTX *ctx = conn->c_sasl_authctx;
1566         if ( ctx != NULL && ctx->sc_external_id.bv_val ) {
1567                 /* should check ssf */
1568                 mechs = ldap_str2charray( "EXTERNAL", "," );
1569         }
1570 #endif
1571
1572         return mechs;
1573 }
1574
1575 int slap_sasl_close( Connection *conn )
1576 {
1577 #ifdef HAVE_CYRUS_SASL
1578         sasl_conn_t *ctx = conn->c_sasl_authctx;
1579
1580         if( ctx != NULL ) {
1581                 sasl_dispose( &ctx );
1582         }
1583         if ( conn->c_sasl_sockctx &&
1584                 conn->c_sasl_authctx != conn->c_sasl_sockctx )
1585         {
1586                 ctx = conn->c_sasl_sockctx;
1587                 sasl_dispose( &ctx );
1588         }
1589
1590         conn->c_sasl_authctx = NULL;
1591         conn->c_sasl_sockctx = NULL;
1592         conn->c_sasl_done = 0;
1593
1594         free( conn->c_sasl_extra );
1595         conn->c_sasl_extra = NULL;
1596
1597 #elif defined(SLAP_BUILTIN_SASL)
1598         SASL_CTX *ctx = conn->c_sasl_authctx;
1599         if( ctx ) {
1600                 if( ctx->sc_external_id.bv_val ) {
1601                         free( ctx->sc_external_id.bv_val );
1602                         BER_BVZERO( &ctx->sc_external_id );
1603                 }
1604                 free( ctx );
1605                 conn->c_sasl_authctx = NULL;
1606         }
1607 #endif
1608
1609         return LDAP_SUCCESS;
1610 }
1611
1612 int slap_sasl_bind( Operation *op, SlapReply *rs )
1613 {
1614 #ifdef HAVE_CYRUS_SASL
1615         sasl_conn_t *ctx = op->o_conn->c_sasl_authctx;
1616         struct berval response;
1617         unsigned reslen = 0;
1618         int sc;
1619
1620         Debug(LDAP_DEBUG_ARGS,
1621                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1622                 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
1623                 op->o_conn->c_sasl_bind_in_progress ? "<continuing>" :
1624                 op->o_conn->c_sasl_bind_mech.bv_val,
1625                 op->orb_cred.bv_len );
1626
1627         if( ctx == NULL ) {
1628                 send_ldap_error( op, rs, LDAP_UNAVAILABLE,
1629                         "SASL unavailable on this session" );
1630                 return rs->sr_err;
1631         }
1632
1633 #if SASL_VERSION_MAJOR >= 2
1634 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1635         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1636 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1637         sasl_server_step( ctx, cred, clen, resp, rlen )
1638 #else
1639 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1640         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
1641 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1642         sasl_server_step( ctx, cred, clen, resp, rlen, err )
1643 #endif
1644
1645         if ( !op->o_conn->c_sasl_bind_in_progress ) {
1646                 /* If we already authenticated once, must use a new context */
1647                 if ( op->o_conn->c_sasl_done ) {
1648                         sasl_ssf_t ssf = 0;
1649                         const char *authid = NULL;
1650 #if SASL_VERSION_MAJOR >= 2
1651                         sasl_getprop( ctx, SASL_SSF_EXTERNAL, (void *)&ssf );
1652                         sasl_getprop( ctx, SASL_AUTH_EXTERNAL, (void *)&authid );
1653                         if ( authid ) authid = ch_strdup( authid );
1654 #endif
1655                         if ( ctx != op->o_conn->c_sasl_sockctx ) {
1656                                 sasl_dispose( &ctx );
1657                         }
1658                         op->o_conn->c_sasl_authctx = NULL;
1659
1660                         slap_sasl_open( op->o_conn, 1 );
1661                         ctx = op->o_conn->c_sasl_authctx;
1662 #if SASL_VERSION_MAJOR >= 2
1663                         if ( authid ) {
1664                                 sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1665                                 sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
1666                                 ch_free( (char *)authid );
1667                         }
1668 #endif
1669                 }
1670                 sc = START( ctx,
1671                         op->o_conn->c_sasl_bind_mech.bv_val,
1672                         op->orb_cred.bv_val, op->orb_cred.bv_len,
1673                         (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1674
1675         } else {
1676                 sc = STEP( ctx,
1677                         op->orb_cred.bv_val, op->orb_cred.bv_len,
1678                         (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1679         }
1680
1681         response.bv_len = reslen;
1682
1683         if ( sc == SASL_OK ) {
1684                 sasl_ssf_t *ssf = NULL;
1685
1686                 ber_dupbv_x( &op->orb_edn, &op->o_conn->c_sasl_dn, op->o_tmpmemctx );
1687                 BER_BVZERO( &op->o_conn->c_sasl_dn );
1688                 op->o_conn->c_sasl_done = 1;
1689
1690                 rs->sr_err = LDAP_SUCCESS;
1691
1692                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1693                 op->orb_ssf = ssf ? *ssf : 0;
1694
1695                 ctx = NULL;
1696                 if( op->orb_ssf ) {
1697                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1698                         op->o_conn->c_sasl_layers++;
1699
1700                         /* If there's an old layer, set sockctx to NULL to
1701                          * tell connection_read() to wait for us to finish.
1702                          * Otherwise there is a race condition: we have to
1703                          * send the Bind response using the old security
1704                          * context and then remove it before reading any
1705                          * new messages.
1706                          */
1707                         if ( op->o_conn->c_sasl_sockctx ) {
1708                                 ctx = op->o_conn->c_sasl_sockctx;
1709                                 op->o_conn->c_sasl_sockctx = NULL;
1710                         } else {
1711                                 op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1712                         }
1713                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1714                 }
1715
1716                 /* Must send response using old security layer */
1717                 if (response.bv_len) rs->sr_sasldata = &response;
1718                 send_ldap_sasl( op, rs );
1719
1720                 /* Now dispose of the old security layer.
1721                  */
1722                 if ( ctx ) {
1723                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1724                         ldap_pvt_sasl_remove( op->o_conn->c_sb );
1725                         op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1726                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1727                         sasl_dispose( &ctx );
1728                 }
1729         } else if ( sc == SASL_CONTINUE ) {
1730                 rs->sr_err = LDAP_SASL_BIND_IN_PROGRESS,
1731 #if SASL_VERSION_MAJOR >= 2
1732                 rs->sr_text = sasl_errdetail( ctx );
1733 #endif
1734                 rs->sr_sasldata = &response;
1735                 send_ldap_sasl( op, rs );
1736
1737         } else {
1738                 BER_BVZERO( &op->o_conn->c_sasl_dn );
1739 #if SASL_VERSION_MAJOR >= 2
1740                 rs->sr_text = sasl_errdetail( ctx );
1741 #endif
1742                 rs->sr_err = slap_sasl_err2ldap( sc ),
1743                 send_ldap_result( op, rs );
1744         }
1745
1746 #if SASL_VERSION_MAJOR < 2
1747         if( response.bv_len ) ch_free( response.bv_val );
1748 #endif
1749
1750         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rs->sr_err, 0, 0);
1751
1752 #elif defined(SLAP_BUILTIN_SASL)
1753         /* built-in SASL implementation */
1754         SASL_CTX *ctx = op->o_conn->c_sasl_authctx;
1755
1756         if ( ctx == NULL ) {
1757                 send_ldap_error( op, rs, LDAP_OTHER,
1758                         "Internal SASL Error" );
1759
1760         } else if ( bvmatch( &ext_bv, &op->o_conn->c_sasl_bind_mech ) ) {
1761                 /* EXTERNAL */
1762
1763                 if( op->orb_cred.bv_len ) {
1764                         rs->sr_text = "proxy authorization not support";
1765                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1766                         send_ldap_result( op, rs );
1767
1768                 } else {
1769                         op->orb_edn = ctx->sc_external_id;
1770                         rs->sr_err = LDAP_SUCCESS;
1771                         rs->sr_sasldata = NULL;
1772                         send_ldap_sasl( op, rs );
1773                 }
1774
1775         } else {
1776                 send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1777                         "requested SASL mechanism not supported" );
1778         }
1779 #else
1780         send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1781                 "SASL not supported" );
1782 #endif
1783
1784         return rs->sr_err;
1785 }
1786
1787 char* slap_sasl_secprops( const char *in )
1788 {
1789 #ifdef HAVE_CYRUS_SASL
1790         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1791
1792         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1793 #else
1794         return "SASL not supported";
1795 #endif
1796 }
1797
1798 void slap_sasl_secprops_unparse( struct berval *bv )
1799 {
1800 #ifdef HAVE_CYRUS_SASL
1801         ldap_pvt_sasl_secprops_unparse( &sasl_secprops, bv );
1802 #endif
1803 }
1804
1805 #ifdef HAVE_CYRUS_SASL
1806 int
1807 slap_sasl_setpass( Operation *op, SlapReply *rs )
1808 {
1809         struct berval id = BER_BVNULL;  /* needs to come from connection */
1810         struct berval new = BER_BVNULL;
1811         struct berval old = BER_BVNULL;
1812
1813         assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
1814
1815         rs->sr_err = sasl_getprop( op->o_conn->c_sasl_authctx, SASL_USERNAME,
1816                 (SASL_CONST void **)(char *)&id.bv_val );
1817
1818         if( rs->sr_err != SASL_OK ) {
1819                 rs->sr_text = "unable to retrieve SASL username";
1820                 rs->sr_err = LDAP_OTHER;
1821                 goto done;
1822         }
1823
1824         Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1825                 id.bv_val ? id.bv_val : "", 0, 0 );
1826
1827         rs->sr_err = slap_passwd_parse( op->ore_reqdata,
1828                 NULL, &old, &new, &rs->sr_text );
1829
1830         if( rs->sr_err != LDAP_SUCCESS ) {
1831                 goto done;
1832         }
1833
1834         if( new.bv_len == 0 ) {
1835                 slap_passwd_generate(&new);
1836
1837                 if( new.bv_len == 0 ) {
1838                         rs->sr_text = "password generation failed.";
1839                         rs->sr_err = LDAP_OTHER;
1840                         goto done;
1841                 }
1842
1843                 rs->sr_rspdata = slap_passwd_return( &new );
1844         }
1845
1846 #if SASL_VERSION_MAJOR < 2
1847         rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx,
1848                 id.bv_val, new.bv_val, new.bv_len, 0, &rs->sr_text );
1849 #else
1850         rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx, id.bv_val,
1851                 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1852         if( rs->sr_err != SASL_OK ) {
1853                 rs->sr_text = sasl_errdetail( op->o_conn->c_sasl_authctx );
1854         }
1855 #endif
1856         switch(rs->sr_err) {
1857                 case SASL_OK:
1858                         rs->sr_err = LDAP_SUCCESS;
1859                         break;
1860
1861                 case SASL_NOCHANGE:
1862                 case SASL_NOMECH:
1863                 case SASL_DISABLED:
1864                 case SASL_PWLOCK:
1865                 case SASL_FAIL:
1866                 case SASL_BADPARAM:
1867                 default:
1868                         rs->sr_err = LDAP_OTHER;
1869         }
1870
1871 done:
1872         return rs->sr_err;
1873 }
1874 #endif /* HAVE_CYRUS_SASL */
1875
1876 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
1877  * string returned in *dn is in its own allocated memory, and must be free'd
1878  * by the calling process.  -Mark Adamson, Carnegie Mellon
1879  *
1880  * The "dn:" prefix is no longer used anywhere inside slapd. It is only used
1881  * on strings passed in directly from SASL.  -Howard Chu, Symas Corp.
1882  */
1883
1884 #define SET_NONE        0
1885 #define SET_DN          1
1886 #define SET_U           2
1887
1888 int slap_sasl_getdn( Connection *conn, Operation *op, struct berval *id,
1889         char *user_realm, struct berval *dn, int flags )
1890 {
1891         int rc, is_dn = SET_NONE, do_norm = 1;
1892         struct berval dn2, *mech;
1893
1894         assert( conn != NULL );
1895         assert( id != NULL );
1896
1897         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: conn %lu id=%s [len=%lu]\n",
1898                 conn->c_connid,
1899                 BER_BVISNULL( id ) ? "NULL" : ( BER_BVISEMPTY( id ) ? "<empty>" : id->bv_val ),
1900                 BER_BVISNULL( id ) ? 0 : ( BER_BVISEMPTY( id ) ? 0 :
1901                                            (unsigned long) id->bv_len ) );
1902
1903         if ( !op ) {
1904                 op = conn->c_sasl_bindop;
1905         }
1906         assert( op != NULL );
1907
1908         BER_BVZERO( dn );
1909
1910         if ( !BER_BVISNULL( id ) ) {
1911                 /* Blatantly anonymous ID */
1912                 static struct berval bv_anonymous = BER_BVC( "anonymous" );
1913
1914                 if ( ber_bvstrcasecmp( id, &bv_anonymous ) == 0 ) {
1915                         return( LDAP_SUCCESS );
1916                 }
1917
1918         } else {
1919                 /* FIXME: if empty, should we stop? */
1920                 BER_BVSTR( id, "" );
1921         }
1922
1923         if ( !BER_BVISEMPTY( &conn->c_sasl_bind_mech ) ) {
1924                 mech = &conn->c_sasl_bind_mech;
1925         } else {
1926                 mech = &conn->c_authmech;
1927         }
1928
1929         /* An authcID needs to be converted to authzID form. Set the
1930          * values directly into *dn; they will be normalized later. (and
1931          * normalizing always makes a new copy.) An ID from a TLS certificate
1932          * is already normalized, so copy it and skip normalization.
1933          */
1934         if( flags & SLAP_GETDN_AUTHCID ) {
1935                 if( bvmatch( mech, &ext_bv )) {
1936                         /* EXTERNAL DNs are already normalized */
1937                         assert( !BER_BVISNULL( id ) );
1938
1939                         do_norm = 0;
1940                         is_dn = SET_DN;
1941                         ber_dupbv_x( dn, id, op->o_tmpmemctx );
1942
1943                 } else {
1944                         /* convert to u:<username> form */
1945                         is_dn = SET_U;
1946                         *dn = *id;
1947                 }
1948         }
1949
1950         if( is_dn == SET_NONE ) {
1951                 if( !strncasecmp( id->bv_val, "u:", STRLENOF( "u:" ) ) ) {
1952                         is_dn = SET_U;
1953                         dn->bv_val = id->bv_val + STRLENOF( "u:" );
1954                         dn->bv_len = id->bv_len - STRLENOF( "u:" );
1955
1956                 } else if ( !strncasecmp( id->bv_val, "dn:", STRLENOF( "dn:" ) ) ) {
1957                         is_dn = SET_DN;
1958                         dn->bv_val = id->bv_val + STRLENOF( "dn:" );
1959                         dn->bv_len = id->bv_len - STRLENOF( "dn:" );
1960                 }
1961         }
1962
1963         /* No other possibilities from here */
1964         if( is_dn == SET_NONE ) {
1965                 BER_BVZERO( dn );
1966                 return( LDAP_INAPPROPRIATE_AUTH );
1967         }
1968
1969         /* Username strings */
1970         if( is_dn == SET_U ) {
1971                 /* ITS#3419: values may need escape */
1972                 LDAPRDN         DN[ 5 ];
1973                 LDAPAVA         *RDNs[ 4 ][ 2 ];
1974                 LDAPAVA         AVAs[ 4 ];
1975                 int             irdn;
1976
1977                 irdn = 0;
1978                 DN[ irdn ] = RDNs[ irdn ];
1979                 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1980                 AVAs[ irdn ].la_attr = slap_schema.si_ad_uid->ad_cname;
1981                 AVAs[ irdn ].la_value = *dn;
1982                 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1983                 AVAs[ irdn ].la_private = NULL;
1984                 RDNs[ irdn ][ 1 ] = NULL;
1985
1986                 if ( user_realm && *user_realm ) {
1987                         irdn++;
1988                         DN[ irdn ] = RDNs[ irdn ];
1989                         RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1990                         AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1991                         ber_str2bv( user_realm, 0, 0, &AVAs[ irdn ].la_value );
1992                         AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1993                         AVAs[ irdn ].la_private = NULL;
1994                         RDNs[ irdn ][ 1 ] = NULL;
1995                 }
1996
1997                 if ( !BER_BVISNULL( mech ) ) {
1998                         irdn++;
1999                         DN[ irdn ] = RDNs[ irdn ];
2000                         RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
2001                         AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
2002                         AVAs[ irdn ].la_value = *mech;
2003                         AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
2004                         AVAs[ irdn ].la_private = NULL;
2005                         RDNs[ irdn ][ 1 ] = NULL;
2006                 }
2007
2008                 irdn++;
2009                 DN[ irdn ] = RDNs[ irdn ];
2010                 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
2011                 AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
2012                 BER_BVSTR( &AVAs[ irdn ].la_value, "auth" );
2013                 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
2014                 AVAs[ irdn ].la_private = NULL;
2015                 RDNs[ irdn ][ 1 ] = NULL;
2016
2017                 irdn++;
2018                 DN[ irdn ] = NULL;
2019
2020                 rc = ldap_dn2bv_x( DN, dn, LDAP_DN_FORMAT_LDAPV3,
2021                                 op->o_tmpmemctx );
2022                 if ( rc != LDAP_SUCCESS ) {
2023                         BER_BVZERO( dn );
2024                         return rc;
2025                 }
2026
2027                 Debug( LDAP_DEBUG_TRACE,
2028                         "slap_sasl_getdn: u:id converted to %s\n",
2029                         dn->bv_val, 0, 0 );
2030
2031         } else {
2032
2033                 /* Dup the DN in any case, so we don't risk
2034                  * leaks or dangling pointers later,
2035                  * and the DN value is '\0' terminated */
2036                 ber_dupbv_x( &dn2, dn, op->o_tmpmemctx );
2037                 dn->bv_val = dn2.bv_val;
2038         }
2039
2040         /* All strings are in DN form now. Normalize if needed. */
2041         if ( do_norm ) {
2042                 rc = dnNormalize( 0, NULL, NULL, dn, &dn2, op->o_tmpmemctx );
2043
2044                 /* User DNs were constructed above and must be freed now */
2045                 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
2046
2047                 if ( rc != LDAP_SUCCESS ) {
2048                         BER_BVZERO( dn );
2049                         return rc;
2050                 }
2051                 *dn = dn2;
2052         }
2053
2054         /* Run thru regexp */
2055         slap_sasl2dn( op, dn, &dn2, flags );
2056         if( !BER_BVISNULL( &dn2 ) ) {
2057                 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
2058                 *dn = dn2;
2059                 Debug( LDAP_DEBUG_TRACE,
2060                         "slap_sasl_getdn: dn:id converted to %s\n",
2061                         dn->bv_val, 0, 0 );
2062         }
2063
2064         return( LDAP_SUCCESS );
2065 }