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 1998-2015 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 #ifdef SLAP_AUXPROP_DONTUSECOPY
 153 int slap_dontUseCopy_ignore;
 154 BerVarray slap_dontUseCopy_propnames;
 155 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 156
 157 static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
 158 static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
 159
 160 #define SLAP_SASL_PROP_CONN     0
 161 #define SLAP_SASL_PROP_AUTHCLEN 1
 162 #define SLAP_SASL_PROP_AUTHC    2
 163 #define SLAP_SASL_PROP_AUTHZLEN 3
 164 #define SLAP_SASL_PROP_AUTHZ    4
 165 #define SLAP_SASL_PROP_COUNT    5       /* Number of properties we used */
 166
 167 typedef struct lookup_info {
 168         int flags;
 169         const struct propval *list;
 170         sasl_server_params_t *sparams;
 171 } lookup_info;
 172
 173 static slap_response sasl_ap_lookup;
 174
 175 static struct berval sc_cleartext = BER_BVC("{CLEARTEXT}");
 176
 177 static int
 178 sasl_ap_lookup( Operation *op, SlapReply *rs )
 179 {
 180         BerVarray bv;
 181         AttributeDescription *ad;
 182         Attribute *a;
 183         const char *text;
 184         int rc, i;
 185         lookup_info *sl = (lookup_info *)op->o_callback->sc_private;
 186
 187         /* return the actual error code,
 188          * to allow caller to handle specific errors
 189          */
 190         if (rs->sr_type != REP_SEARCH) return rs->sr_err;
 191
 192         for( i = 0; sl->list[i].name; i++ ) {
 193                 const char *name = sl->list[i].name;
 194
 195                 if ( name[0] == '*' ) {
 196                         if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
 197                         /* Skip our private properties */
 198                         if ( !strcmp( name, slap_propnames[0] )) {
 199                                 i += SLAP_SASL_PROP_COUNT - 1;
 200                                 continue;
 201                         }
 202                         name++;
 203                 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
 204                         continue;
 205
 206                 if ( sl->list[i].values ) {
 207                         if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
 208                 }
 209                 ad = NULL;
 210                 rc = slap_str2ad( name, &ad, &text );
 211                 if ( rc != LDAP_SUCCESS ) {
 212                         Debug( LDAP_DEBUG_TRACE,
 213                                 "slap_ap_lookup: str2ad(%s): %s\n", name, text, 0 );
 214                         continue;
 215                 }
 216
 217                 /* If it's the rootdn and a rootpw was present, we already set
 218                  * it so don't override it here.
 219                  */
 220                 if ( ad == slap_schema.si_ad_userPassword && sl->list[i].values &&
 221                         be_isroot_dn( op->o_bd, &op->o_req_ndn ))
 222                         continue;
 223
 224                 a = attr_find( rs->sr_entry->e_attrs, ad );
 225                 if ( !a ) continue;
 226                 if ( ! access_allowed( op, rs->sr_entry, ad, NULL, ACL_AUTH, NULL ) ) {
 227                         continue;
 228                 }
 229                 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) ) {
 230                         sl->sparams->utils->prop_erase( sl->sparams->propctx,
 231                         sl->list[i].name );
 232                 }
 233                 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
 234                         /* ITS#3846 don't give hashed passwords to SASL */
 235                         if ( ad == slap_schema.si_ad_userPassword &&
 236                                 bv->bv_val[0] == '{' /*}*/ )
 237                         {
 238                                 if ( lutil_passwd_scheme( bv->bv_val ) ) {
 239                                         /* If it's not a recognized scheme, just assume it's
 240                                          * a cleartext password that happened to include brackets.
 241                                          *
 242                                          * If it's a recognized scheme, skip this value, unless the
 243                                          * scheme is {CLEARTEXT}. In that case, skip over the
 244                                          * scheme name and use the remainder. If there is nothing
 245                                          * past the scheme name, skip this value.
 246                                          */
 247 #ifdef SLAPD_CLEARTEXT
 248                                         if ( !strncasecmp( bv->bv_val, sc_cleartext.bv_val,
 249                                                 sc_cleartext.bv_len )) {
 250                                                 struct berval cbv;
 251                                                 cbv.bv_len = bv->bv_len - sc_cleartext.bv_len;
 252                                                 if ( cbv.bv_len > 0 ) {
 253                                                         cbv.bv_val = bv->bv_val + sc_cleartext.bv_len;
 254                                                         sl->sparams->utils->prop_set( sl->sparams->propctx,
 255                                                                 sl->list[i].name, cbv.bv_val, cbv.bv_len );
 256                                                 }
 257                                         }
 258 #endif
 259                                         continue;
 260                                 }
 261                         }
 262                         sl->sparams->utils->prop_set( sl->sparams->propctx,
 263                                 sl->list[i].name, bv->bv_val, bv->bv_len );
 264                 }
 265         }
 266         return LDAP_SUCCESS;
 267 }
 268
 269 #if SASL_VERSION_FULL >= 0x020118
 270 static int
 271 #else
 272 static void
 273 #endif
 274 slap_auxprop_lookup(
 275         void *glob_context,
 276         sasl_server_params_t *sparams,
 277         unsigned flags,
 278         const char *user,
 279         unsigned ulen)
 280 {
 281         OperationBuffer opbuf = {{ NULL }};
 282         Operation *op = (Operation *)&opbuf;
 283         int i, doit = 0;
 284         Connection *conn = NULL;
 285         lookup_info sl;
 286         int rc = LDAP_SUCCESS;
 287 #ifdef SLAP_AUXPROP_DONTUSECOPY
 288         int dontUseCopy = 0;
 289         BackendDB *dontUseCopy_bd = NULL;
 290 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 291
 292         sl.list = sparams->utils->prop_get( sparams->propctx );
 293         sl.sparams = sparams;
 294         sl.flags = flags;
 295
 296         /* Find our DN and conn first */
 297         for( i = 0; sl.list[i].name; i++ ) {
 298                 if ( sl.list[i].name[0] == '*' ) {
 299                         if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
 300                                 if ( sl.list[i].values && sl.list[i].values[0] )
 301                                         AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
 302                                 continue;
 303                         }
 304                         if ( flags & SASL_AUXPROP_AUTHZID ) {
 305                                 if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZLEN] )) {
 306                                         if ( sl.list[i].values && sl.list[i].values[0] )
 307                                                 AC_MEMCPY( &op->o_req_ndn.bv_len, sl.list[i].values[0],
 308                                                         sizeof( op->o_req_ndn.bv_len ) );
 309                                 } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZ] )) {
 310                                         if ( sl.list[i].values )
 311                                                 op->o_req_ndn.bv_val = (char *)sl.list[i].values[0];
 312                                         break;
 313                                 }
 314                         }
 315
 316                         if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
 317                                 if ( sl.list[i].values && sl.list[i].values[0] )
 318                                         AC_MEMCPY( &op->o_req_ndn.bv_len, sl.list[i].values[0],
 319                                                 sizeof( op->o_req_ndn.bv_len ) );
 320                         } else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
 321                                 if ( sl.list[i].values ) {
 322                                         op->o_req_ndn.bv_val = (char *)sl.list[i].values[0];
 323                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 324                                                 break;
 325                                 }
 326                         }
 327 #ifdef SLAP_AUXPROP_DONTUSECOPY
 328                         if ( slap_dontUseCopy_propnames != NULL ) {
 329                                 int j;
 330                                 struct berval bv;
 331                                 ber_str2bv( &sl.list[i].name[1], 0, 1, &bv );
 332                                 for ( j = 0; !BER_BVISNULL( &slap_dontUseCopy_propnames[ j ]); j++ ) {
 333                                         if ( bvmatch( &bv, &slap_dontUseCopy_propnames[ j ] ) ) {
 334                                                 dontUseCopy = 1;
 335                                                 break;
 336                                         }
 337                                 }
 338                         }
 339 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 340                 }
 341         }
 342
 343         /* we don't know anything about this, ignore it */
 344         if ( !conn )
 345                 return SASL_OK;
 346
 347         /* Now see what else needs to be fetched */
 348         for( i = 0; sl.list[i].name; i++ ) {
 349                 const char *name = sl.list[i].name;
 350
 351                 if ( name[0] == '*' ) {
 352                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 353                         /* Skip our private properties */
 354                         if ( !strcmp( name, slap_propnames[0] )) {
 355                                 i += SLAP_SASL_PROP_COUNT - 1;
 356                                 continue;
 357                         }
 358                         name++;
 359                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 360                         continue;
 361
 362                 if ( sl.list[i].values ) {
 363                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 364                 }
 365                 doit = 1;
 366                 break;
 367         }
 368
 369         if (doit) {
 370                 slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
 371
 372                 cb.sc_private = &sl;
 373
 374                 op->o_bd = select_backend( &op->o_req_ndn, 1 );
 375
 376                 if ( op->o_bd ) {
 377                         /* For rootdn, see if we can use the rootpw */
 378                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) &&
 379                                 !BER_BVISEMPTY( &op->o_bd->be_rootpw )) {
 380                                 struct berval cbv = BER_BVNULL;
 381
 382                                 /* If there's a recognized scheme, see if it's CLEARTEXT */
 383                                 if ( lutil_passwd_scheme( op->o_bd->be_rootpw.bv_val )) {
 384                                         if ( !strncasecmp( op->o_bd->be_rootpw.bv_val,
 385                                                 sc_cleartext.bv_val, sc_cleartext.bv_len )) {
 386
 387                                                 /* If it's CLEARTEXT, skip past scheme spec */
 388                                                 cbv.bv_len = op->o_bd->be_rootpw.bv_len -
 389                                                         sc_cleartext.bv_len;
 390                                                 if ( cbv.bv_len ) {
 391                                                         cbv.bv_val = op->o_bd->be_rootpw.bv_val +
 392                                                                 sc_cleartext.bv_len;
 393                                                 }
 394                                         }
 395                                 /* No scheme, use the whole value */
 396                                 } else {
 397                                         cbv = op->o_bd->be_rootpw;
 398                                 }
 399                                 if ( !BER_BVISEMPTY( &cbv )) {
 400                                         for( i = 0; sl.list[i].name; i++ ) {
 401                                                 const char *name = sl.list[i].name;
 402
 403                                                 if ( name[0] == '*' ) {
 404                                                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 405                                                                 name++;
 406                                                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 407                                                         continue;
 408
 409                                                 if ( !strcasecmp(name,"userPassword") ) {
 410                                                         sl.sparams->utils->prop_set( sl.sparams->propctx,
 411                                                                 sl.list[i].name, cbv.bv_val, cbv.bv_len );
 412                                                         break;
 413                                                 }
 414                                         }
 415                                 }
 416                         }
 417
 418 #ifdef SLAP_AUXPROP_DONTUSECOPY
 419                         if ( SLAP_SHADOW( op->o_bd ) && dontUseCopy ) {
 420                                 dontUseCopy_bd = op->o_bd;
 421                                 op->o_bd = frontendDB;
 422                         }
 423
 424 retry_dontUseCopy:;
 425 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 426
 427                         if ( op->o_bd->be_search ) {
 428                                 SlapReply rs = {REP_RESULT};
 429 #ifdef SLAP_AUXPROP_DONTUSECOPY
 430                                 LDAPControl **save_ctrls = NULL, c;
 431                                 int save_dontUseCopy;
 432 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 433
 434                                 op->o_hdr = conn->c_sasl_bindop->o_hdr;
 435                                 op->o_controls = opbuf.ob_controls;
 436                                 op->o_tag = LDAP_REQ_SEARCH;
 437                                 op->o_dn = conn->c_ndn;
 438                                 op->o_ndn = conn->c_ndn;
 439                                 op->o_callback = &cb;
 440                                 slap_op_time( &op->o_time, &op->o_tincr );
 441                                 op->o_do_not_cache = 1;
 442                                 op->o_is_auth_check = 1;
 443                                 op->o_req_dn = op->o_req_ndn;
 444                                 op->ors_scope = LDAP_SCOPE_BASE;
 445                                 op->ors_deref = LDAP_DEREF_NEVER;
 446                                 op->ors_tlimit = SLAP_NO_LIMIT;
 447                                 op->ors_slimit = 1;
 448                                 op->ors_filter = &generic_filter;
 449                                 op->ors_filterstr = generic_filterstr;
 450                                 op->o_authz = conn->c_authz;
 451                                 /* FIXME: we want all attributes, right? */
 452                                 op->ors_attrs = NULL;
 453
 454 #ifdef SLAP_AUXPROP_DONTUSECOPY
 455                                 if ( dontUseCopy ) {
 456                                         save_dontUseCopy = op->o_dontUseCopy;
 457                                         if ( !op->o_dontUseCopy ) {
 458                                                 int cnt = 0;
 459                                                 save_ctrls = op->o_ctrls;
 460                                                 if ( op->o_ctrls ) {
 461                                                         for ( ; op->o_ctrls[ cnt ]; cnt++ )
 462                                                                 ;
 463                                                 }
 464                                                 op->o_ctrls = op->o_tmpcalloc( sizeof(LDAPControl *), cnt + 2, op->o_tmpmemctx );
 465                                                 if ( cnt ) {
 466                                                         for ( cnt = 0; save_ctrls[ cnt ]; cnt++ ) {
 467                                                                 op->o_ctrls[ cnt ] = save_ctrls[ cnt ];
 468                                                         }
 469                                                 }
 470                                                 c.ldctl_oid = LDAP_CONTROL_DONTUSECOPY;
 471                                                 c.ldctl_iscritical = 1;
 472                                                 BER_BVZERO( &c.ldctl_value );
 473                                                 op->o_ctrls[ cnt ] = &c;
 474                                         }
 475                                         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 476                                 }
 477 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 478
 479                                 rc = op->o_bd->be_search( op, &rs );
 480
 481 #ifdef SLAP_AUXPROP_DONTUSECOPY
 482                                 if ( dontUseCopy ) {
 483                                         if ( save_ctrls != op->o_ctrls ) {
 484                                                 op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 485                                                 op->o_ctrls = save_ctrls;
 486                                                 op->o_dontUseCopy = save_dontUseCopy;
 487                                         }
 488
 489                                         if ( rs.sr_err == LDAP_UNAVAILABLE && slap_dontUseCopy_ignore )
 490                                         {
 491                                                 op->o_bd = dontUseCopy_bd;
 492                                                 dontUseCopy = 0;
 493                                                 goto retry_dontUseCopy;
 494                                         }
 495                                 }
 496 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 497                         }
 498                 }
 499         }
 500 #if SASL_VERSION_FULL >= 0x020118
 501         return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
 502 #endif
 503 }
 504
 505 #if SASL_VERSION_FULL >= 0x020110
 506 static int
 507 slap_auxprop_store(
 508         void *glob_context,
 509         sasl_server_params_t *sparams,
 510         struct propctx *prctx,
 511         const char *user,
 512         unsigned ulen)
 513 {
 514         Operation op = {0};
 515         Opheader oph;
 516         int rc, i;
 517         unsigned j;
 518         Connection *conn = NULL;
 519         const struct propval *pr;
 520         Modifications *modlist = NULL, **modtail = &modlist, *mod;
 521         slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
 522         char textbuf[SLAP_TEXT_BUFLEN];
 523         const char *text;
 524         size_t textlen = sizeof(textbuf);
 525 #ifdef SLAP_AUXPROP_DONTUSECOPY
 526         int dontUseCopy = 0;
 527         BackendDB *dontUseCopy_bd = NULL;
 528 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 529
 530         /* just checking if we are enabled */
 531         if (!prctx) return SASL_OK;
 532
 533         if (!sparams || !user) return SASL_BADPARAM;
 534
 535         pr = sparams->utils->prop_get( sparams->propctx );
 536
 537         /* Find our DN and conn first */
 538         for( i = 0; pr[i].name; i++ ) {
 539                 if ( pr[i].name[0] == '*' ) {
 540                         if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
 541                                 if ( pr[i].values && pr[i].values[0] )
 542                                         AC_MEMCPY( &conn, pr[i].values[0], sizeof( conn ) );
 543                                 continue;
 544                         }
 545                         if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
 546                                 if ( pr[i].values && pr[i].values[0] )
 547                                         AC_MEMCPY( &op.o_req_ndn.bv_len, pr[i].values[0],
 548                                                 sizeof( op.o_req_ndn.bv_len ) );
 549                         } else if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
 550                                 if ( pr[i].values )
 551                                         op.o_req_ndn.bv_val = (char *)pr[i].values[0];
 552                         }
 553 #ifdef SLAP_AUXPROP_DONTUSECOPY
 554                         if ( slap_dontUseCopy_propnames != NULL ) {
 555                                 struct berval bv;
 556                                 ber_str2bv( &pr[i].name[1], 0, 1, &bv );
 557                                 for ( j = 0; !BER_BVISNULL( &slap_dontUseCopy_propnames[ j ] ); j++ ) {
 558                                         if ( bvmatch( &bv, &slap_dontUseCopy_propnames[ j ] ) ) {
 559                                                 dontUseCopy = 1;
 560                                                 break;
 561                                         }
 562                                 }
 563                         }
 564 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 565                 }
 566         }
 567         if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
 568
 569         op.o_bd = select_backend( &op.o_req_ndn, 1 );
 570
 571         if ( !op.o_bd || !op.o_bd->be_modify ) return SASL_FAIL;
 572
 573 #ifdef SLAP_AUXPROP_DONTUSECOPY
 574         if ( SLAP_SHADOW( op.o_bd ) && dontUseCopy ) {
 575                 dontUseCopy_bd = op.o_bd;
 576                 op.o_bd = frontendDB;
 577                 op.o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 578         }
 579 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 580
 581         pr = sparams->utils->prop_get( prctx );
 582         if (!pr) return SASL_BADPARAM;
 583
 584         for (i=0; pr[i].name; i++);
 585         if (!i) return SASL_BADPARAM;
 586
 587         for (i=0; pr[i].name; i++) {
 588                 mod = (Modifications *)ch_malloc( sizeof(Modifications) );
 589                 mod->sml_op = LDAP_MOD_REPLACE;
 590                 mod->sml_flags = 0;
 591                 ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
 592                 mod->sml_numvals = pr[i].nvalues;
 593                 mod->sml_values = (struct berval *)ch_malloc( (pr[i].nvalues + 1) *
 594                         sizeof(struct berval));
 595                 for (j=0; j<pr[i].nvalues; j++) {
 596                         ber_str2bv( pr[i].values[j], 0, 1, &mod->sml_values[j]);
 597                 }
 598                 BER_BVZERO( &mod->sml_values[j] );
 599                 mod->sml_nvalues = NULL;
 600                 mod->sml_desc = NULL;
 601                 *modtail = mod;
 602                 modtail = &mod->sml_next;
 603         }
 604         *modtail = NULL;
 605
 606         rc = slap_mods_check( &op, modlist, &text, textbuf, textlen, NULL );
 607
 608         if ( rc == LDAP_SUCCESS ) {
 609                 rc = slap_mods_no_user_mod_check( &op, modlist,
 610                         &text, textbuf, textlen );
 611
 612                 if ( rc == LDAP_SUCCESS ) {
 613                         if ( conn->c_sasl_bindop ) {
 614                                 op.o_hdr = conn->c_sasl_bindop->o_hdr;
 615                         } else {
 616                                 op.o_hdr = &oph;
 617                                 memset( &oph, 0, sizeof(oph) );
 618                                 operation_fake_init( conn, &op, ldap_pvt_thread_pool_context(), 0 );
 619                         }
 620                         op.o_tag = LDAP_REQ_MODIFY;
 621                         op.o_ndn = op.o_req_ndn;
 622                         op.o_callback = &cb;
 623                         slap_op_time( &op.o_time, &op.o_tincr );
 624                         op.o_do_not_cache = 1;
 625                         op.o_is_auth_check = 1;
 626                         op.o_req_dn = op.o_req_ndn;
 627                         op.orm_modlist = modlist;
 628
 629                         for (;;) {
 630                                 SlapReply rs = {REP_RESULT};
 631                                 rc = op.o_bd->be_modify( &op, &rs );
 632
 633 #ifdef SLAP_AUXPROP_DONTUSECOPY
 634                                 if ( dontUseCopy &&
 635                                         rs.sr_err == LDAP_UNAVAILABLE &&
 636                                         slap_dontUseCopy_ignore )
 637                                 {
 638                                         op.o_bd = dontUseCopy_bd;
 639                                         op.o_dontUseCopy = SLAP_CONTROL_NONE;
 640                                         dontUseCopy = 0;
 641                                         continue;
 642                                 }
 643 #endif /* SLAP_AUXPROP_DONTUSECOPY */
 644                                 break;
 645                         }
 646                 }
 647         }
 648         slap_mods_free( modlist, 1 );
 649         return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
 650 }
 651 #endif /* SASL_VERSION_FULL >= 2.1.16 */
 652
 653 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 654         0,      /* Features */
 655         0,      /* spare */
 656         NULL,   /* glob_context */
 657         NULL,   /* auxprop_free */
 658         slap_auxprop_lookup,
 659         "slapd",        /* name */
 660 #if SASL_VERSION_FULL >= 0x020110
 661         slap_auxprop_store      /* the declaration of this member changed
 662                                  * in cyrus SASL from 2.1.15 to 2.1.16 */
 663 #else
 664         NULL
 665 #endif
 666 };
 667
 668 static int
 669 slap_auxprop_init(
 670         const sasl_utils_t *utils,
 671         int max_version,
 672         int *out_version,
 673         sasl_auxprop_plug_t **plug,
 674         const char *plugname)
 675 {
 676         if ( !out_version || !plug ) return SASL_BADPARAM;
 677
 678         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 679
 680         *out_version = SASL_AUXPROP_PLUG_VERSION;
 681         *plug = &slap_auxprop_plugin;
 682         return SASL_OK;
 683 }
 684
 685 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 686  * auxiliary property, so that we can refer to it in sasl_authorize
 687  * without interfering with anything else. Also, the SASL username
 688  * buffer is constrained to 256 characters, and our DNs could be
 689  * much longer (SLAP_LDAPDN_MAXLEN, currently set to 8192)
 690  */
 691 static int
 692 slap_sasl_canonicalize(
 693         sasl_conn_t *sconn,
 694         void *context,
 695         const char *in,
 696         unsigned inlen,
 697         unsigned flags,
 698         const char *user_realm,
 699         char *out,
 700         unsigned out_max,
 701         unsigned *out_len)
 702 {
 703         Connection *conn = (Connection *)context;
 704         struct propctx *props = sasl_auxprop_getctx( sconn );
 705         struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
 706         struct berval dn;
 707         int rc, which;
 708         const char *names[2];
 709         struct berval   bvin;
 710
 711         *out_len = 0;
 712
 713         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
 714                 conn ? (long) conn->c_connid : -1L,
 715                 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 716                 in ? in : "<empty>");
 717
 718         /* If name is too big, just truncate. We don't care, we're
 719          * using DNs, not the usernames.
 720          */
 721         if ( inlen > out_max )
 722                 inlen = out_max-1;
 723
 724         /* This is a Simple Bind using SPASSWD. That means the in-directory
 725          * userPassword of the Binding user already points at SASL, so it
 726          * cannot be used to actually satisfy a password comparison. Just
 727          * ignore it, some other mech will process it.
 728          */
 729         if ( !conn->c_sasl_bindop ||
 730                 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) goto done;
 731
 732         /* See if we need to add request, can only do it once */
 733         prop_getnames( props, slap_propnames, auxvals );
 734         if ( !auxvals[0].name )
 735                 prop_request( props, slap_propnames );
 736
 737         if ( flags & SASL_CU_AUTHID )
 738                 which = SLAP_SASL_PROP_AUTHCLEN;
 739         else
 740                 which = SLAP_SASL_PROP_AUTHZLEN;
 741
 742         /* Need to store the Connection for auxprop_lookup */
 743         if ( !auxvals[SLAP_SASL_PROP_CONN].values ) {
 744                 names[0] = slap_propnames[SLAP_SASL_PROP_CONN];
 745                 names[1] = NULL;
 746                 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
 747         }
 748
 749         /* Already been here? */
 750         if ( auxvals[which].values )
 751                 goto done;
 752
 753         /* Normally we require an authzID to have a u: or dn: prefix.
 754          * However, SASL frequently gives us an authzID that is just
 755          * an exact copy of the authcID, without a prefix. We need to
 756          * detect and allow this condition. If SASL calls canonicalize
 757          * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
 758          * But if it's broken into two calls, we need to remember the
 759          * authcID so that we can compare the authzID later. We store
 760          * the authcID temporarily in conn->c_sasl_dn. We necessarily
 761          * finish Canonicalizing before Authorizing, so there is no
 762          * conflict with slap_sasl_authorize's use of this temp var.
 763          *
 764          * The SASL EXTERNAL mech is backwards from all the other mechs,
 765          * it does authzID before the authcID. If we see that authzID
 766          * has already been done, don't do anything special with authcID.
 767          */
 768         if ( flags == SASL_CU_AUTHID && !auxvals[SLAP_SASL_PROP_AUTHZ].values ) {
 769                 conn->c_sasl_dn.bv_val = (char *) in;
 770                 conn->c_sasl_dn.bv_len = 0;
 771         } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
 772                 rc = strcmp( in, conn->c_sasl_dn.bv_val );
 773                 conn->c_sasl_dn.bv_val = NULL;
 774                 /* They were equal, no work needed */
 775                 if ( !rc ) goto done;
 776         }
 777
 778         bvin.bv_val = (char *)in;
 779         bvin.bv_len = inlen;
 780         rc = slap_sasl_getdn( conn, NULL, &bvin, (char *)user_realm, &dn,
 781                 (flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
 782         if ( rc != LDAP_SUCCESS ) {
 783                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 784                 return SASL_NOAUTHZ;
 785         }
 786
 787         names[0] = slap_propnames[which];
 788         names[1] = NULL;
 789         prop_set( props, names[0], (char *)&dn.bv_len, sizeof( dn.bv_len ) );
 790
 791         which++;
 792         names[0] = slap_propnames[which];
 793         prop_set( props, names[0], dn.bv_val, dn.bv_len );
 794
 795         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
 796                 conn ? (long) conn->c_connid : -1L, names[0]+1,
 797                 dn.bv_val ? dn.bv_val : "<EMPTY>" );
 798
 799         /* Not needed any more, SASL has copied it */
 800         if ( conn && conn->c_sasl_bindop )
 801                 conn->c_sasl_bindop->o_tmpfree( dn.bv_val, conn->c_sasl_bindop->o_tmpmemctx );
 802
 803 done:
 804         AC_MEMCPY( out, in, inlen );
 805         out[inlen] = '\0';
 806
 807         *out_len = inlen;
 808
 809         return SASL_OK;
 810 }
 811
 812 static int
 813 slap_sasl_authorize(
 814         sasl_conn_t *sconn,
 815         void *context,
 816         char *requested_user,
 817         unsigned rlen,
 818         char *auth_identity,
 819         unsigned alen,
 820         const char *def_realm,
 821         unsigned urlen,
 822         struct propctx *props)
 823 {
 824         Connection *conn = (Connection *)context;
 825         /* actually:
 826          *      (SLAP_SASL_PROP_COUNT - 1)      because we skip "conn",
 827          *      + 1                             for NULL termination?
 828          */
 829         struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
 830         struct berval authcDN, authzDN = BER_BVNULL;
 831         int rc;
 832
 833         /* Simple Binds don't support proxy authorization, ignore it */
 834         if ( !conn->c_sasl_bindop ||
 835                 conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) return SASL_OK;
 836
 837         Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
 838                 "authcid=\"%s\" authzid=\"%s\"\n",
 839                 conn ? (long) conn->c_connid : -1L, auth_identity, requested_user );
 840         if ( conn->c_sasl_dn.bv_val ) {
 841                 BER_BVZERO( &conn->c_sasl_dn );
 842         }
 843
 844         /* Skip SLAP_SASL_PROP_CONN */
 845         prop_getnames( props, slap_propnames+1, auxvals );
 846
 847         /* Should not happen */
 848         if ( !auxvals[0].values ) {
 849                 sasl_seterror( sconn, 0, "invalid authcid" );
 850                 return SASL_NOAUTHZ;
 851         }
 852
 853         AC_MEMCPY( &authcDN.bv_len, auxvals[0].values[0], sizeof(authcDN.bv_len) );
 854         authcDN.bv_val = auxvals[1].values ? (char *)auxvals[1].values[0] : NULL;
 855         conn->c_sasl_dn = authcDN;
 856
 857         /* Nothing to do if no authzID was given */
 858         if ( !auxvals[2].name || !auxvals[2].values ) {
 859                 goto ok;
 860         }
 861
 862         AC_MEMCPY( &authzDN.bv_len, auxvals[2].values[0], sizeof(authzDN.bv_len) );
 863         authzDN.bv_val = auxvals[3].values ? (char *)auxvals[3].values[0] : NULL;
 864
 865         rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
 866         if ( rc != LDAP_SUCCESS ) {
 867                 Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
 868                         "proxy authorization disallowed (%d)\n",
 869                         conn ? (long) conn->c_connid : -1L, rc, 0 );
 870
 871                 sasl_seterror( sconn, 0, "not authorized" );
 872                 return SASL_NOAUTHZ;
 873         }
 874
 875         /* FIXME: we need yet another dup because slap_sasl_getdn()
 876          * is using the bind operation slab */
 877         ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
 878
 879 ok:
 880         if (conn->c_sasl_bindop) {
 881                 Statslog( LDAP_DEBUG_STATS,
 882                         "%s BIND authcid=\"%s\" authzid=\"%s\"\n",
 883                         conn->c_sasl_bindop->o_log_prefix,
 884                         auth_identity, requested_user, 0, 0 );
 885         }
 886
 887         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 888                 " proxy authorization allowed authzDN=\"%s\"\n",
 889                 conn ? (long) conn->c_connid : -1L,
 890                 authzDN.bv_val ? authzDN.bv_val : "", 0 );
 891         return SASL_OK;
 892 }
 893
 894 static int
 895 slap_sasl_err2ldap( int saslerr )
 896 {
 897         int rc;
 898
 899         /* map SASL errors to LDAP resultCode returned by:
 900          *      sasl_server_new()
 901          *              SASL_OK, SASL_NOMEM
 902          *      sasl_server_step()
 903          *              SASL_OK, SASL_CONTINUE, SASL_TRANS, SASL_BADPARAM, SASL_BADPROT,
 904          *      ...
 905          *      sasl_server_start()
 906          *      + SASL_NOMECH
 907          *      sasl_setprop()
 908          *              SASL_OK, SASL_BADPARAM
 909          */
 910
 911         switch (saslerr) {
 912                 case SASL_OK:
 913                         rc = LDAP_SUCCESS;
 914                         break;
 915                 case SASL_CONTINUE:
 916                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 917                         break;
 918                 case SASL_FAIL:
 919                 case SASL_NOMEM:
 920                         rc = LDAP_OTHER;
 921                         break;
 922                 case SASL_NOMECH:
 923                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 924                         break;
 925                 case SASL_BADAUTH:
 926                 case SASL_NOUSER:
 927                 case SASL_TRANS:
 928                 case SASL_EXPIRED:
 929                         rc = LDAP_INVALID_CREDENTIALS;
 930                         break;
 931                 case SASL_NOAUTHZ:
 932                         rc = LDAP_INSUFFICIENT_ACCESS;
 933                         break;
 934                 case SASL_TOOWEAK:
 935                 case SASL_ENCRYPT:
 936                         rc = LDAP_INAPPROPRIATE_AUTH;
 937                         break;
 938                 case SASL_UNAVAIL:
 939                 case SASL_TRYAGAIN:
 940                         rc = LDAP_UNAVAILABLE;
 941                         break;
 942                 case SASL_DISABLED:
 943                         rc = LDAP_UNWILLING_TO_PERFORM;
 944                         break;
 945                 default:
 946                         rc = LDAP_OTHER;
 947                         break;
 948         }
 949
 950         return rc;
 951 }
 952
 953 #ifdef SLAPD_SPASSWD
 954
 955 static struct berval sasl_pwscheme = BER_BVC("{SASL}");
 956
 957 static int chk_sasl(
 958         const struct berval *sc,
 959         const struct berval * passwd,
 960         const struct berval * cred,
 961         const char **text )
 962 {
 963         unsigned int i;
 964         int rtn;
 965         void *ctx, *sconn = NULL;
 966
 967         for( i=0; i<cred->bv_len; i++) {
 968                 if(cred->bv_val[i] == '\0') {
 969                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 970                 }
 971         }
 972
 973         if( cred->bv_val[i] != '\0' ) {
 974                 return LUTIL_PASSWD_ERR;        /* cred must behave like a string */
 975         }
 976
 977         for( i=0; i<passwd->bv_len; i++) {
 978                 if(passwd->bv_val[i] == '\0') {
 979                         return LUTIL_PASSWD_ERR;        /* NUL character in password */
 980                 }
 981         }
 982
 983         if( passwd->bv_val[i] != '\0' ) {
 984                 return LUTIL_PASSWD_ERR;        /* passwd must behave like a string */
 985         }
 986
 987         rtn = LUTIL_PASSWD_ERR;
 988
 989         ctx = ldap_pvt_thread_pool_context();
 990         ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sasl_bind, &sconn, NULL );
 991
 992         if( sconn != NULL ) {
 993                 int sc;
 994                 sc = sasl_checkpass( sconn,
 995                         passwd->bv_val, passwd->bv_len,
 996                         cred->bv_val, cred->bv_len );
 997                 rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
 998         }
 999
1000         return rtn;
1001 }
1002 #endif /* SLAPD_SPASSWD */
1003
1004 #endif /* HAVE_CYRUS_SASL */
1005
1006 #ifdef ENABLE_REWRITE
1007
1008 typedef struct slapd_map_data {
1009         struct berval base;
1010         struct berval filter;
1011         AttributeName attrs[2];
1012         int scope;
1013 } slapd_map_data;
1014
1015 static void *
1016 slapd_rw_config( const char *fname, int lineno, int argc, char **argv )
1017 {
1018         slapd_map_data *ret = NULL;
1019         LDAPURLDesc *lud = NULL;
1020         char *uri;
1021         AttributeDescription *ad = NULL;
1022         int rc, flen = 0;
1023         struct berval dn, ndn;
1024
1025         if ( argc != 1 ) {
1026                 Debug( LDAP_DEBUG_ANY,
1027                         "[%s:%d] slapd map needs URI\n",
1028                         fname, lineno, 0 );
1029         return NULL;
1030         }
1031
1032         uri = argv[0];
1033         if ( strncasecmp( uri, "uri=", STRLENOF( "uri=" ) ) == 0 ) {
1034                 uri += STRLENOF( "uri=" );
1035         }
1036
1037         if ( ldap_url_parse( uri, &lud ) != LDAP_URL_SUCCESS ) {
1038                 Debug( LDAP_DEBUG_ANY,
1039                         "[%s:%d] illegal URI '%s'\n",
1040                         fname, lineno, uri );
1041         return NULL;
1042         }
1043
1044         if ( strcasecmp( lud->lud_scheme, "ldap" )) {
1045                 Debug( LDAP_DEBUG_ANY,
1046                         "[%s:%d] illegal URI scheme '%s'\n",
1047                         fname, lineno, lud->lud_scheme );
1048                 goto done;
1049         }
1050
1051         if (( lud->lud_host && lud->lud_host[0] ) || lud->lud_exts
1052                 || !lud->lud_dn ) {
1053                 Debug( LDAP_DEBUG_ANY,
1054                         "[%s:%d] illegal URI '%s'\n",
1055                         fname, lineno, uri );
1056                 goto done;
1057         }
1058
1059         if ( lud->lud_attrs ) {
1060                 if ( lud->lud_attrs[1] ) {
1061                         Debug( LDAP_DEBUG_ANY,
1062                                 "[%s:%d] only one attribute allowed in URI\n",
1063                                 fname, lineno, 0 );
1064                         goto done;
1065                 }
1066                 if ( strcasecmp( lud->lud_attrs[0], "dn" ) &&
1067                         strcasecmp( lud->lud_attrs[0], "entryDN" )) {
1068                         const char *text;
1069                         rc = slap_str2ad( lud->lud_attrs[0], &ad, &text );
1070                         if ( rc )
1071                                 goto done;
1072                 }
1073         }
1074         ber_str2bv( lud->lud_dn, 0, 0, &dn );
1075         if ( dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ))
1076                 goto done;
1077
1078         if ( lud->lud_filter ) {
1079                 flen = strlen( lud->lud_filter ) + 1;
1080         }
1081         ret = ch_malloc( sizeof( slapd_map_data ) + flen );
1082         ret->base = ndn;
1083         if ( flen ) {
1084                 ret->filter.bv_val = (char *)(ret+1);
1085                 ret->filter.bv_len = flen - 1;
1086                 strcpy( ret->filter.bv_val, lud->lud_filter );
1087         } else {
1088                 BER_BVZERO( &ret->filter );
1089         }
1090         ret->scope = lud->lud_scope;
1091         if ( ad ) {
1092                 ret->attrs[0].an_name = ad->ad_cname;
1093         } else {
1094                 BER_BVZERO( &ret->attrs[0].an_name );
1095         }
1096         ret->attrs[0].an_desc = ad;
1097         BER_BVZERO( &ret->attrs[1].an_name );
1098 done:
1099         ldap_free_urldesc( lud );
1100         return ret;
1101 }
1102
1103 struct slapd_rw_info {
1104         slapd_map_data *si_data;
1105         struct berval si_val;
1106 };
1107
1108 static int
1109 slapd_rw_cb( Operation *op, SlapReply *rs )
1110 {
1111         if ( rs->sr_type == REP_SEARCH ) {
1112                 struct slapd_rw_info *si = op->o_callback->sc_private;
1113
1114                 if ( si->si_data->attrs[0].an_desc ) {
1115                         Attribute *a;
1116
1117                         a = attr_find( rs->sr_entry->e_attrs,
1118                                 si->si_data->attrs[0].an_desc );
1119                         if ( a ) {
1120                                 ber_dupbv( &si->si_val, a->a_vals );
1121                         }
1122                 } else {
1123                         ber_dupbv( &si->si_val, &rs->sr_entry->e_name );
1124                 }
1125         }
1126         return LDAP_SUCCESS;
1127 }
1128
1129 static int
1130 slapd_rw_apply( void *private, const char *filter, struct berval *val )
1131 {
1132         slapd_map_data *sl = private;
1133         slap_callback cb = { NULL };
1134         Connection conn = {0};
1135         OperationBuffer opbuf;
1136         Operation *op;
1137         void *thrctx;
1138         SlapReply rs = {REP_RESULT};
1139         struct slapd_rw_info si;
1140         char *ptr;
1141         int rc;
1142
1143         thrctx = ldap_pvt_thread_pool_context();
1144         connection_fake_init2( &conn, &opbuf, thrctx, 0 );
1145         op = &opbuf.ob_op;
1146
1147         op->o_tag = LDAP_REQ_SEARCH;
1148         op->o_req_dn = op->o_req_ndn = sl->base;
1149         op->o_bd = select_backend( &op->o_req_ndn, 1 );
1150         if ( !op->o_bd ) {
1151                 return REWRITE_ERR;
1152         }
1153         si.si_data = sl;
1154         BER_BVZERO( &si.si_val );
1155         op->ors_scope = sl->scope;
1156         op->ors_deref = LDAP_DEREF_NEVER;
1157         op->ors_slimit = 1;
1158         op->ors_tlimit = SLAP_NO_LIMIT;
1159         if ( sl->attrs[0].an_desc ) {
1160                 op->ors_attrs = sl->attrs;
1161         } else {
1162                 op->ors_attrs = slap_anlist_no_attrs;
1163         }
1164         if ( filter ) {
1165                 rc = strlen( filter );
1166         } else {
1167                 rc = 0;
1168         }
1169         rc += sl->filter.bv_len;
1170         ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( rc + 1, op->o_tmpmemctx );
1171         if ( sl->filter.bv_len ) {
1172                 ptr = lutil_strcopy( ptr, sl->filter.bv_val );
1173         } else {
1174                 *ptr = '\0';
1175         }
1176         if ( filter ) {
1177                 strcpy( ptr, filter );
1178         }
1179         op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
1180         if ( !op->ors_filter ) {
1181                 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1182                 return REWRITE_ERR;
1183         }
1184
1185         op->ors_attrsonly = 0;
1186         op->o_dn = op->o_bd->be_rootdn;
1187         op->o_ndn = op->o_bd->be_rootndn;
1188         op->o_do_not_cache = 1;
1189
1190         cb.sc_response = slapd_rw_cb;
1191         cb.sc_private = &si;
1192         op->o_callback = &cb;
1193
1194         rc = op->o_bd->be_search( op, &rs );
1195         if ( rc == LDAP_SUCCESS && !BER_BVISNULL( &si.si_val )) {
1196                 *val = si.si_val;
1197                 rc = REWRITE_SUCCESS;
1198         } else {
1199                 if ( !BER_BVISNULL( &si.si_val )) {
1200                         ch_free( si.si_val.bv_val );
1201                 }
1202                 rc = REWRITE_ERR;
1203         }
1204         filter_free_x( op, op->ors_filter, 1 );
1205         op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
1206         return rc;
1207 }
1208
1209 static int
1210 slapd_rw_destroy( void *private )
1211 {
1212         slapd_map_data *md = private;
1213
1214         assert( private != NULL );
1215
1216         ch_free( md->base.bv_val );
1217         ch_free( md );
1218
1219         return 0;
1220 }
1221
1222 static const rewrite_mapper slapd_mapper = {
1223         "slapd",
1224         slapd_rw_config,
1225         slapd_rw_apply,
1226         slapd_rw_destroy
1227 };
1228 #endif
1229
1230 int slap_sasl_init( void )
1231 {
1232 #ifdef HAVE_CYRUS_SASL
1233         int rc;
1234         static sasl_callback_t server_callbacks[] = {
1235                 { SASL_CB_LOG, (sasl_callback_ft)&slap_sasl_log, NULL },
1236                 { SASL_CB_GETOPT, (sasl_callback_ft)&slap_sasl_getopt, NULL },
1237                 { SASL_CB_LIST_END, NULL, NULL }
1238         };
1239 #endif
1240
1241 #ifdef ENABLE_REWRITE
1242         rewrite_mapper_register( &slapd_mapper );
1243 #endif
1244
1245 #ifdef HAVE_CYRUS_SASL
1246 #ifdef HAVE_SASL_VERSION
1247         /* stringify the version number, sasl.h doesn't do it for us */
1248 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
1249 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
1250 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
1251                                 SASL_VERSION_STEP)
1252
1253         sasl_version( NULL, &rc );
1254         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
1255                 (rc & 0xffff) < SASL_VERSION_STEP)
1256         {
1257                 char version[sizeof("xxx.xxx.xxxxx")];
1258                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
1259                         rc & 0xffff );
1260                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: SASL library version mismatch:"
1261                         " expected %s, got %s\n",
1262                         SASL_VERSION_STRING, version, 0 );
1263                 return -1;
1264         }
1265 #endif
1266
1267         sasl_set_mutex(
1268                 ldap_pvt_sasl_mutex_new,
1269                 ldap_pvt_sasl_mutex_lock,
1270                 ldap_pvt_sasl_mutex_unlock,
1271                 ldap_pvt_sasl_mutex_dispose );
1272
1273         generic_filter.f_desc = slap_schema.si_ad_objectClass;
1274
1275         rc = sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
1276         if( rc != SASL_OK ) {
1277                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: auxprop add plugin failed\n",
1278                         0, 0, 0 );
1279                 return -1;
1280         }
1281
1282         /* should provide callbacks for logging */
1283         /* server name should be configurable */
1284         rc = sasl_server_init( server_callbacks, "slapd" );
1285
1286         if( rc != SASL_OK ) {
1287                 Debug( LDAP_DEBUG_ANY, "slap_sasl_init: server init failed\n",
1288                         0, 0, 0 );
1289
1290                 return -1;
1291         }
1292
1293 #ifdef SLAPD_SPASSWD
1294         lutil_passwd_add( &sasl_pwscheme, chk_sasl, NULL );
1295 #endif
1296
1297         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1298                 0, 0, 0 );
1299
1300         /* default security properties */
1301         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1302         sasl_secprops.max_ssf = INT_MAX;
1303         sasl_secprops.maxbufsize = 65536;
1304         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1305 #endif
1306
1307         return 0;
1308 }
1309
1310 int slap_sasl_destroy( void )
1311 {
1312 #ifdef HAVE_CYRUS_SASL
1313         sasl_done();
1314
1315 #ifdef SLAP_AUXPROP_DONTUSECOPY
1316         if ( slap_dontUseCopy_propnames ) {
1317                 ber_bvarray_free( slap_dontUseCopy_propnames );
1318                 slap_dontUseCopy_propnames = NULL;
1319         }
1320 #endif /* SLAP_AUXPROP_DONTUSECOPY */
1321 #endif
1322         free( sasl_host );
1323         sasl_host = NULL;
1324
1325         return 0;
1326 }
1327
1328 static char *
1329 slap_sasl_peer2ipport( struct berval *peer )
1330 {
1331         int             isv6 = 0;
1332         char            *ipport, *p,
1333                         *addr = &peer->bv_val[ STRLENOF( "IP=" ) ];
1334         ber_len_t       plen = peer->bv_len - STRLENOF( "IP=" );
1335
1336         /* IPv6? */
1337         if ( addr[0] == '[' ) {
1338                 isv6 = 1;
1339                 plen--;
1340         }
1341         ipport = ch_strdup( &addr[isv6] );
1342
1343         /* Convert IPv6/IPv4 addresses to address;port syntax. */
1344         p = strrchr( ipport, ':' );
1345         if ( p != NULL ) {
1346                 *p = ';';
1347                 if ( isv6 ) {
1348                         assert( p[-1] == ']' );
1349                         AC_MEMCPY( &p[-1], p, plen - ( p - ipport ) + 1 );
1350                 }
1351
1352         } else if ( isv6 ) {
1353                 /* trim ']' */
1354                 plen--;
1355                 assert( addr[plen] == ']' );
1356                 addr[plen] = '\0';
1357         }
1358
1359         return ipport;
1360 }
1361
1362 int slap_sasl_open( Connection *conn, int reopen )
1363 {
1364         int sc = LDAP_SUCCESS;
1365 #ifdef HAVE_CYRUS_SASL
1366         int cb;
1367
1368         sasl_conn_t *ctx = NULL;
1369         sasl_callback_t *session_callbacks;
1370         char *ipremoteport = NULL, *iplocalport = NULL;
1371
1372         assert( conn->c_sasl_authctx == NULL );
1373
1374         if ( !reopen ) {
1375                 assert( conn->c_sasl_extra == NULL );
1376
1377                 session_callbacks =
1378                         SLAP_CALLOC( 5, sizeof(sasl_callback_t));
1379                 if( session_callbacks == NULL ) {
1380                         Debug( LDAP_DEBUG_ANY,
1381                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1382                         return -1;
1383                 }
1384                 conn->c_sasl_extra = session_callbacks;
1385
1386                 session_callbacks[cb=0].id = SASL_CB_LOG;
1387                 session_callbacks[cb].proc = (sasl_callback_ft)&slap_sasl_log;
1388                 session_callbacks[cb++].context = conn;
1389
1390                 session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1391                 session_callbacks[cb].proc = (sasl_callback_ft)&slap_sasl_authorize;
1392                 session_callbacks[cb++].context = conn;
1393
1394                 session_callbacks[cb].id = SASL_CB_CANON_USER;
1395                 session_callbacks[cb].proc = (sasl_callback_ft)&slap_sasl_canonicalize;
1396                 session_callbacks[cb++].context = conn;
1397
1398                 session_callbacks[cb].id = SASL_CB_LIST_END;
1399                 session_callbacks[cb].proc = NULL;
1400                 session_callbacks[cb++].context = NULL;
1401         } else {
1402                 session_callbacks = conn->c_sasl_extra;
1403         }
1404
1405         conn->c_sasl_layers = 0;
1406
1407         /* create new SASL context */
1408         if ( conn->c_sock_name.bv_len != 0 &&
1409                 strncmp( conn->c_sock_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1410         {
1411                 iplocalport = slap_sasl_peer2ipport( &conn->c_sock_name );
1412         }
1413
1414         if ( conn->c_peer_name.bv_len != 0 &&
1415                 strncmp( conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
1416         {
1417                 ipremoteport = slap_sasl_peer2ipport( &conn->c_peer_name );
1418         }
1419
1420         sc = sasl_server_new( "ldap", sasl_host, global_realm,
1421                 iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
1422         if ( iplocalport != NULL ) {
1423                 ch_free( iplocalport );
1424         }
1425         if ( ipremoteport != NULL ) {
1426                 ch_free( ipremoteport );
1427         }
1428
1429         if( sc != SASL_OK ) {
1430                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1431                         sc, 0, 0 );
1432
1433                 return -1;
1434         }
1435
1436         conn->c_sasl_authctx = ctx;
1437
1438         if( sc == SASL_OK ) {
1439                 sc = sasl_setprop( ctx,
1440                         SASL_SEC_PROPS, &sasl_secprops );
1441
1442                 if( sc != SASL_OK ) {
1443                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1444                                 sc, 0, 0 );
1445
1446                         slap_sasl_close( conn );
1447                         return -1;
1448                 }
1449         }
1450
1451         sc = slap_sasl_err2ldap( sc );
1452
1453 #elif defined(SLAP_BUILTIN_SASL)
1454         /* built-in SASL implementation */
1455         SASL_CTX *ctx = (SASL_CTX *) SLAP_MALLOC(sizeof(SASL_CTX));
1456         if( ctx == NULL ) return -1;
1457
1458         ctx->sc_external_ssf = 0;
1459         BER_BVZERO( &ctx->sc_external_id );
1460
1461         conn->c_sasl_authctx = ctx;
1462 #endif
1463
1464         return sc;
1465 }
1466
1467 int slap_sasl_external(
1468         Connection *conn,
1469         slap_ssf_t ssf,
1470         struct berval *auth_id )
1471 {
1472 #ifdef HAVE_CYRUS_SASL
1473         int sc;
1474         sasl_conn_t *ctx = conn->c_sasl_authctx;
1475         sasl_ssf_t sasl_ssf = ssf;
1476
1477         if ( ctx == NULL ) {
1478                 return LDAP_UNAVAILABLE;
1479         }
1480
1481         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
1482
1483         if ( sc != SASL_OK ) {
1484                 return LDAP_OTHER;
1485         }
1486
1487         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL,
1488                 auth_id ? auth_id->bv_val : NULL );
1489
1490         if ( sc != SASL_OK ) {
1491                 return LDAP_OTHER;
1492         }
1493 #elif defined(SLAP_BUILTIN_SASL)
1494         /* built-in SASL implementation */
1495         SASL_CTX *ctx = conn->c_sasl_authctx;
1496         if ( ctx == NULL ) return LDAP_UNAVAILABLE;
1497
1498         ctx->sc_external_ssf = ssf;
1499         if( auth_id ) {
1500                 ctx->sc_external_id = *auth_id;
1501                 BER_BVZERO( auth_id );
1502         } else {
1503                 BER_BVZERO( &ctx->sc_external_id );
1504         }
1505 #endif
1506
1507         return LDAP_SUCCESS;
1508 }
1509
1510 int slap_sasl_cbinding( Connection *conn, struct berval *cbv )
1511 {
1512 #ifdef SASL_CHANNEL_BINDING
1513         sasl_channel_binding_t *cb = ch_malloc( sizeof(*cb) + cbv->bv_len );;
1514         cb->name = "ldap";
1515         cb->critical = 0;
1516         cb->data = (char *)(cb+1);
1517         cb->len = cbv->bv_len;
1518         memcpy( (void *)cb->data, cbv->bv_val, cbv->bv_len );
1519         sasl_setprop( conn->c_sasl_authctx, SASL_CHANNEL_BINDING, cb );
1520         conn->c_sasl_cbind = cb;
1521 #endif
1522         return LDAP_SUCCESS;
1523 }
1524
1525 int slap_sasl_reset( Connection *conn )
1526 {
1527         return LDAP_SUCCESS;
1528 }
1529
1530 char ** slap_sasl_mechs( Connection *conn )
1531 {
1532         char **mechs = NULL;
1533
1534 #ifdef HAVE_CYRUS_SASL
1535         sasl_conn_t *ctx = conn->c_sasl_authctx;
1536
1537         if( ctx == NULL ) ctx = conn->c_sasl_sockctx;
1538
1539         if( ctx != NULL ) {
1540                 int sc;
1541                 SASL_CONST char *mechstr;
1542
1543                 sc = sasl_listmech( ctx,
1544                         NULL, NULL, ",", NULL,
1545                         &mechstr, NULL, NULL );
1546
1547                 if( sc != SASL_OK ) {
1548                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1549                                 sc, 0, 0 );
1550
1551                         return NULL;
1552                 }
1553
1554                 mechs = ldap_str2charray( mechstr, "," );
1555         }
1556 #elif defined(SLAP_BUILTIN_SASL)
1557         /* builtin SASL implementation */
1558         SASL_CTX *ctx = conn->c_sasl_authctx;
1559         if ( ctx != NULL && ctx->sc_external_id.bv_val ) {
1560                 /* should check ssf */
1561                 mechs = ldap_str2charray( "EXTERNAL", "," );
1562         }
1563 #endif
1564
1565         return mechs;
1566 }
1567
1568 int slap_sasl_close( Connection *conn )
1569 {
1570 #ifdef HAVE_CYRUS_SASL
1571         sasl_conn_t *ctx = conn->c_sasl_authctx;
1572
1573         if( ctx != NULL ) {
1574                 sasl_dispose( &ctx );
1575         }
1576         if ( conn->c_sasl_sockctx &&
1577                 conn->c_sasl_authctx != conn->c_sasl_sockctx )
1578         {
1579                 ctx = conn->c_sasl_sockctx;
1580                 sasl_dispose( &ctx );
1581         }
1582
1583         conn->c_sasl_authctx = NULL;
1584         conn->c_sasl_sockctx = NULL;
1585         conn->c_sasl_done = 0;
1586
1587         free( conn->c_sasl_extra );
1588         conn->c_sasl_extra = NULL;
1589
1590         free( conn->c_sasl_cbind );
1591         conn->c_sasl_cbind = NULL;
1592
1593 #elif defined(SLAP_BUILTIN_SASL)
1594         SASL_CTX *ctx = conn->c_sasl_authctx;
1595         if( ctx ) {
1596                 if( ctx->sc_external_id.bv_val ) {
1597                         free( ctx->sc_external_id.bv_val );
1598                         BER_BVZERO( &ctx->sc_external_id );
1599                 }
1600                 free( ctx );
1601                 conn->c_sasl_authctx = NULL;
1602         }
1603 #endif
1604
1605         return LDAP_SUCCESS;
1606 }
1607
1608 int slap_sasl_bind( Operation *op, SlapReply *rs )
1609 {
1610 #ifdef HAVE_CYRUS_SASL
1611         sasl_conn_t *ctx = op->o_conn->c_sasl_authctx;
1612         struct berval response;
1613         unsigned reslen = 0;
1614         int sc;
1615
1616         Debug(LDAP_DEBUG_ARGS,
1617                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1618                 op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
1619                 op->o_conn->c_sasl_bind_in_progress ? "<continuing>" :
1620                 op->o_conn->c_sasl_bind_mech.bv_val,
1621                 op->orb_cred.bv_len );
1622
1623         if( ctx == NULL ) {
1624                 send_ldap_error( op, rs, LDAP_UNAVAILABLE,
1625                         "SASL unavailable on this session" );
1626                 return rs->sr_err;
1627         }
1628
1629 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1630         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1631 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1632         sasl_server_step( ctx, cred, clen, resp, rlen )
1633
1634         if ( !op->o_conn->c_sasl_bind_in_progress ) {
1635                 /* If we already authenticated once, must use a new context */
1636                 if ( op->o_conn->c_sasl_done ) {
1637                         sasl_ssf_t ssf = 0;
1638                         const char *authid = NULL;
1639                         sasl_getprop( ctx, SASL_SSF_EXTERNAL, (void *)&ssf );
1640                         sasl_getprop( ctx, SASL_AUTH_EXTERNAL, (void *)&authid );
1641                         if ( authid ) authid = ch_strdup( authid );
1642                         if ( ctx != op->o_conn->c_sasl_sockctx ) {
1643                                 sasl_dispose( &ctx );
1644                         }
1645                         op->o_conn->c_sasl_authctx = NULL;
1646
1647                         slap_sasl_open( op->o_conn, 1 );
1648                         ctx = op->o_conn->c_sasl_authctx;
1649                         if ( authid ) {
1650                                 sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1651                                 sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
1652                                 ch_free( (char *)authid );
1653                         }
1654                 }
1655                 sc = START( ctx,
1656                         op->o_conn->c_sasl_bind_mech.bv_val,
1657                         op->orb_cred.bv_val, op->orb_cred.bv_len,
1658                         (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1659
1660         } else {
1661                 sc = STEP( ctx,
1662                         op->orb_cred.bv_val, op->orb_cred.bv_len,
1663                         (SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
1664         }
1665
1666         response.bv_len = reslen;
1667
1668         if ( sc == SASL_OK ) {
1669                 sasl_ssf_t *ssf = NULL;
1670
1671                 ber_dupbv_x( &op->orb_edn, &op->o_conn->c_sasl_dn, op->o_tmpmemctx );
1672                 BER_BVZERO( &op->o_conn->c_sasl_dn );
1673                 op->o_conn->c_sasl_done = 1;
1674
1675                 rs->sr_err = LDAP_SUCCESS;
1676
1677                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1678                 op->orb_ssf = ssf ? *ssf : 0;
1679
1680                 ctx = NULL;
1681                 if( op->orb_ssf ) {
1682                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1683                         op->o_conn->c_sasl_layers++;
1684
1685                         /* If there's an old layer, set sockctx to NULL to
1686                          * tell connection_read() to wait for us to finish.
1687                          * Otherwise there is a race condition: we have to
1688                          * send the Bind response using the old security
1689                          * context and then remove it before reading any
1690                          * new messages.
1691                          */
1692                         if ( op->o_conn->c_sasl_sockctx ) {
1693                                 ctx = op->o_conn->c_sasl_sockctx;
1694                                 op->o_conn->c_sasl_sockctx = NULL;
1695                         } else {
1696                                 op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1697                         }
1698                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1699                 }
1700
1701                 /* Must send response using old security layer */
1702                 rs->sr_sasldata = (response.bv_len ? &response : NULL);
1703                 send_ldap_sasl( op, rs );
1704
1705                 /* Now dispose of the old security layer.
1706                  */
1707                 if ( ctx ) {
1708                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1709                         ldap_pvt_sasl_remove( op->o_conn->c_sb );
1710                         op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
1711                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1712                         sasl_dispose( &ctx );
1713                 }
1714         } else if ( sc == SASL_CONTINUE ) {
1715                 rs->sr_err = LDAP_SASL_BIND_IN_PROGRESS,
1716                 rs->sr_text = sasl_errdetail( ctx );
1717                 rs->sr_sasldata = &response;
1718                 send_ldap_sasl( op, rs );
1719
1720         } else {
1721                 BER_BVZERO( &op->o_conn->c_sasl_dn );
1722                 rs->sr_text = sasl_errdetail( ctx );
1723                 rs->sr_err = slap_sasl_err2ldap( sc ),
1724                 send_ldap_result( op, rs );
1725         }
1726
1727         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rs->sr_err, 0, 0);
1728
1729 #elif defined(SLAP_BUILTIN_SASL)
1730         /* built-in SASL implementation */
1731         SASL_CTX *ctx = op->o_conn->c_sasl_authctx;
1732
1733         if ( ctx == NULL ) {
1734                 send_ldap_error( op, rs, LDAP_OTHER,
1735                         "Internal SASL Error" );
1736
1737         } else if ( bvmatch( &ext_bv, &op->o_conn->c_sasl_bind_mech ) ) {
1738                 /* EXTERNAL */
1739
1740                 if( op->orb_cred.bv_len ) {
1741                         rs->sr_text = "proxy authorization not supported";
1742                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1743                         send_ldap_result( op, rs );
1744
1745                 } else {
1746                         op->orb_edn = ctx->sc_external_id;
1747                         rs->sr_err = LDAP_SUCCESS;
1748                         rs->sr_sasldata = NULL;
1749                         send_ldap_sasl( op, rs );
1750                 }
1751
1752         } else {
1753                 send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1754                         "requested SASL mechanism not supported" );
1755         }
1756 #else
1757         send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
1758                 "SASL not supported" );
1759 #endif
1760
1761         return rs->sr_err;
1762 }
1763
1764 char* slap_sasl_secprops( const char *in )
1765 {
1766 #ifdef HAVE_CYRUS_SASL
1767         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1768
1769         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1770 #else
1771         return "SASL not supported";
1772 #endif
1773 }
1774
1775 void slap_sasl_secprops_unparse( struct berval *bv )
1776 {
1777 #ifdef HAVE_CYRUS_SASL
1778         ldap_pvt_sasl_secprops_unparse( &sasl_secprops, bv );
1779 #endif
1780 }
1781
1782 #ifdef HAVE_CYRUS_SASL
1783 int
1784 slap_sasl_setpass( Operation *op, SlapReply *rs )
1785 {
1786         struct berval id = BER_BVNULL;  /* needs to come from connection */
1787         struct berval new = BER_BVNULL;
1788         struct berval old = BER_BVNULL;
1789
1790         assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
1791
1792         rs->sr_err = sasl_getprop( op->o_conn->c_sasl_authctx, SASL_USERNAME,
1793                 (SASL_CONST void **)(char *)&id.bv_val );
1794
1795         if( rs->sr_err != SASL_OK ) {
1796                 rs->sr_text = "unable to retrieve SASL username";
1797                 rs->sr_err = LDAP_OTHER;
1798                 goto done;
1799         }
1800
1801         Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1802                 id.bv_val ? id.bv_val : "", 0, 0 );
1803
1804         rs->sr_err = slap_passwd_parse( op->ore_reqdata,
1805                 NULL, &old, &new, &rs->sr_text );
1806
1807         if( rs->sr_err != LDAP_SUCCESS ) {
1808                 goto done;
1809         }
1810
1811         if( new.bv_len == 0 ) {
1812                 slap_passwd_generate(&new);
1813
1814                 if( new.bv_len == 0 ) {
1815                         rs->sr_text = "password generation failed.";
1816                         rs->sr_err = LDAP_OTHER;
1817                         goto done;
1818                 }
1819
1820                 rs->sr_rspdata = slap_passwd_return( &new );
1821         }
1822
1823         rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx, id.bv_val,
1824                 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1825         if( rs->sr_err != SASL_OK ) {
1826                 rs->sr_text = sasl_errdetail( op->o_conn->c_sasl_authctx );
1827         }
1828         switch(rs->sr_err) {
1829                 case SASL_OK:
1830                         rs->sr_err = LDAP_SUCCESS;
1831                         break;
1832
1833                 case SASL_NOCHANGE:
1834                 case SASL_NOMECH:
1835                 case SASL_DISABLED:
1836                 case SASL_PWLOCK:
1837                 case SASL_FAIL:
1838                 case SASL_BADPARAM:
1839                 default:
1840                         rs->sr_err = LDAP_OTHER;
1841         }
1842
1843 done:
1844         return rs->sr_err;
1845 }
1846 #endif /* HAVE_CYRUS_SASL */
1847
1848 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
1849  * string returned in *dn is in its own allocated memory, and must be free'd
1850  * by the calling process.  -Mark Adamson, Carnegie Mellon
1851  *
1852  * The "dn:" prefix is no longer used anywhere inside slapd. It is only used
1853  * on strings passed in directly from SASL.  -Howard Chu, Symas Corp.
1854  */
1855
1856 #define SET_NONE        0
1857 #define SET_DN          1
1858 #define SET_U           2
1859
1860 int slap_sasl_getdn( Connection *conn, Operation *op, struct berval *id,
1861         char *user_realm, struct berval *dn, int flags )
1862 {
1863         int rc, is_dn = SET_NONE, do_norm = 1;
1864         struct berval dn2, *mech;
1865
1866         assert( conn != NULL );
1867         assert( id != NULL );
1868
1869         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: conn %lu id=%s [len=%lu]\n",
1870                 conn->c_connid,
1871                 BER_BVISNULL( id ) ? "NULL" : ( BER_BVISEMPTY( id ) ? "<empty>" : id->bv_val ),
1872                 BER_BVISNULL( id ) ? 0 : ( BER_BVISEMPTY( id ) ? 0 :
1873                                            (unsigned long) id->bv_len ) );
1874
1875         if ( !op ) {
1876                 op = conn->c_sasl_bindop;
1877         }
1878         assert( op != NULL );
1879
1880         BER_BVZERO( dn );
1881
1882         if ( !BER_BVISNULL( id ) ) {
1883                 /* Blatantly anonymous ID */
1884                 static struct berval bv_anonymous = BER_BVC( "anonymous" );
1885
1886                 if ( ber_bvstrcasecmp( id, &bv_anonymous ) == 0 ) {
1887                         return( LDAP_SUCCESS );
1888                 }
1889
1890         } else {
1891                 /* FIXME: if empty, should we stop? */
1892                 BER_BVSTR( id, "" );
1893         }
1894
1895         if ( !BER_BVISEMPTY( &conn->c_sasl_bind_mech ) ) {
1896                 mech = &conn->c_sasl_bind_mech;
1897         } else {
1898                 mech = &conn->c_authmech;
1899         }
1900
1901         /* An authcID needs to be converted to authzID form. Set the
1902          * values directly into *dn; they will be normalized later. (and
1903          * normalizing always makes a new copy.) An ID from a TLS certificate
1904          * is already normalized, so copy it and skip normalization.
1905          */
1906         if( flags & SLAP_GETDN_AUTHCID ) {
1907                 if( bvmatch( mech, &ext_bv )) {
1908                         /* EXTERNAL DNs are already normalized */
1909                         assert( !BER_BVISNULL( id ) );
1910
1911                         do_norm = 0;
1912                         is_dn = SET_DN;
1913                         ber_dupbv_x( dn, id, op->o_tmpmemctx );
1914
1915                 } else {
1916                         /* convert to u:<username> form */
1917                         is_dn = SET_U;
1918                         *dn = *id;
1919                 }
1920         }
1921
1922         if( is_dn == SET_NONE ) {
1923                 if( !strncasecmp( id->bv_val, "u:", STRLENOF( "u:" ) ) ) {
1924                         is_dn = SET_U;
1925                         dn->bv_val = id->bv_val + STRLENOF( "u:" );
1926                         dn->bv_len = id->bv_len - STRLENOF( "u:" );
1927
1928                 } else if ( !strncasecmp( id->bv_val, "dn:", STRLENOF( "dn:" ) ) ) {
1929                         is_dn = SET_DN;
1930                         dn->bv_val = id->bv_val + STRLENOF( "dn:" );
1931                         dn->bv_len = id->bv_len - STRLENOF( "dn:" );
1932                 }
1933         }
1934
1935         /* No other possibilities from here */
1936         if( is_dn == SET_NONE ) {
1937                 BER_BVZERO( dn );
1938                 return( LDAP_INAPPROPRIATE_AUTH );
1939         }
1940
1941         /* Username strings */
1942         if( is_dn == SET_U ) {
1943                 /* ITS#3419: values may need escape */
1944                 LDAPRDN         DN[ 5 ];
1945                 LDAPAVA         *RDNs[ 4 ][ 2 ];
1946                 LDAPAVA         AVAs[ 4 ];
1947                 int             irdn;
1948
1949                 irdn = 0;
1950                 DN[ irdn ] = RDNs[ irdn ];
1951                 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1952                 AVAs[ irdn ].la_attr = slap_schema.si_ad_uid->ad_cname;
1953                 AVAs[ irdn ].la_value = *dn;
1954                 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1955                 AVAs[ irdn ].la_private = NULL;
1956                 RDNs[ irdn ][ 1 ] = NULL;
1957
1958                 if ( user_realm && *user_realm ) {
1959                         irdn++;
1960                         DN[ irdn ] = RDNs[ irdn ];
1961                         RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1962                         AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1963                         ber_str2bv( user_realm, 0, 0, &AVAs[ irdn ].la_value );
1964                         AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1965                         AVAs[ irdn ].la_private = NULL;
1966                         RDNs[ irdn ][ 1 ] = NULL;
1967                 }
1968
1969                 if ( !BER_BVISNULL( mech ) ) {
1970                         irdn++;
1971                         DN[ irdn ] = RDNs[ irdn ];
1972                         RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1973                         AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1974                         AVAs[ irdn ].la_value = *mech;
1975                         AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1976                         AVAs[ irdn ].la_private = NULL;
1977                         RDNs[ irdn ][ 1 ] = NULL;
1978                 }
1979
1980                 irdn++;
1981                 DN[ irdn ] = RDNs[ irdn ];
1982                 RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
1983                 AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
1984                 BER_BVSTR( &AVAs[ irdn ].la_value, "auth" );
1985                 AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
1986                 AVAs[ irdn ].la_private = NULL;
1987                 RDNs[ irdn ][ 1 ] = NULL;
1988
1989                 irdn++;
1990                 DN[ irdn ] = NULL;
1991
1992                 rc = ldap_dn2bv_x( DN, dn, LDAP_DN_FORMAT_LDAPV3,
1993                                 op->o_tmpmemctx );
1994                 if ( rc != LDAP_SUCCESS ) {
1995                         BER_BVZERO( dn );
1996                         return rc;
1997                 }
1998
1999                 Debug( LDAP_DEBUG_TRACE,
2000                         "slap_sasl_getdn: u:id converted to %s\n",
2001                         dn->bv_val, 0, 0 );
2002
2003         } else {
2004
2005                 /* Dup the DN in any case, so we don't risk
2006                  * leaks or dangling pointers later,
2007                  * and the DN value is '\0' terminated */
2008                 ber_dupbv_x( &dn2, dn, op->o_tmpmemctx );
2009                 dn->bv_val = dn2.bv_val;
2010         }
2011
2012         /* All strings are in DN form now. Normalize if needed. */
2013         if ( do_norm ) {
2014                 rc = dnNormalize( 0, NULL, NULL, dn, &dn2, op->o_tmpmemctx );
2015
2016                 /* User DNs were constructed above and must be freed now */
2017                 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
2018
2019                 if ( rc != LDAP_SUCCESS ) {
2020                         BER_BVZERO( dn );
2021                         return rc;
2022                 }
2023                 *dn = dn2;
2024         }
2025
2026         /* Run thru regexp */
2027         slap_sasl2dn( op, dn, &dn2, flags );
2028         if( !BER_BVISNULL( &dn2 ) ) {
2029                 slap_sl_free( dn->bv_val, op->o_tmpmemctx );
2030                 *dn = dn2;
2031                 Debug( LDAP_DEBUG_TRACE,
2032                         "slap_sasl_getdn: dn:id converted to %s\n",
2033                         dn->bv_val, 0, 0 );
2034         }
2035
2036         return( LDAP_SUCCESS );
2037 }