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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <ac/stdlib.h>
  11 #include <ac/string.h>
  12
  13 #include <lber.h>
  14 #include <ldap_log.h>
  15
  16 #include "slap.h"
  17
  18 #ifdef HAVE_CYRUS_SASL
  19 #include <limits.h>
  20
  21 #ifdef HAVE_SASL_SASL_H
  22 #include <sasl/sasl.h>
  23 #else
  24 #include <sasl.h>
  25 #endif
  26
  27 #include <lutil.h>
  28 #if SASL_VERSION_MAJOR >= 2
  29 #include <sasl/saslplug.h>
  30 #define SASL_CONST const
  31 #else
  32 #define SASL_CONST
  33 #endif
  34
  35 #include "ldap_pvt.h"
  36 #include "lber_pvt.h"
  37
  38 /* Flags for telling slap_sasl_getdn() what type of identity is being passed */
  39 #define FLAG_GETDN_AUTHCID 2
  40 #define FLAG_GETDN_AUTHZID 4
  41
  42 static sasl_security_properties_t sasl_secprops;
  43
  44 int slap_sasl_config( int cargc, char **cargv, char *line,
  45         const char *fname, int lineno )
  46 {
  47                 /* set SASL proxy authorization policy */
  48                 if ( strcasecmp( cargv[0], "sasl-authz-policy" ) == 0 ) {
  49                         if ( cargc != 2 ) {
  50 #ifdef NEW_LOGGING
  51                                 LDAP_LOG( CONFIG, CRIT,
  52                                            "%s: line %d: missing policy in \"sasl-authz-policy <policy>\" line\n",
  53                                            fname, lineno, 0 );
  54 #else
  55                                 Debug( LDAP_DEBUG_ANY,
  56             "%s: line %d: missing policy in \"sasl-authz-policy <policy>\" line\n",
  57                                     fname, lineno, 0 );
  58 #endif
  59
  60                                 return( 1 );
  61                         }
  62                         if ( slap_sasl_setpolicy( cargv[1] ) ) {
  63 #ifdef NEW_LOGGING
  64                                 LDAP_LOG( CONFIG, CRIT,
  65                                            "%s: line %d: unable "
  66                                            "to parse value \"%s\" "
  67                                            "in \"sasl-authz-policy "
  68                                            "<policy>\" line.\n",
  69                                            fname, lineno, cargv[1] );
  70 #else
  71                                 Debug( LDAP_DEBUG_ANY,
  72                                         "%s: line %d: unable "
  73                                         "to parse value \"%s\" "
  74                                         "in \"sasl-authz-policy "
  75                                         "<policy>\" line\n",
  76                                         fname, lineno, cargv[1] );
  77 #endif
  78                                 return( 1 );
  79                         }
  80
  81
  82                 /* set SASL host */
  83                 } else if ( strcasecmp( cargv[0], "sasl-host" ) == 0 ) {
  84                         if ( cargc < 2 ) {
  85 #ifdef NEW_LOGGING
  86                                 LDAP_LOG( CONFIG, CRIT,
  87                                            "%s: line %d: missing host in \"sasl-host <host>\" line\n",
  88                                            fname, lineno, 0 );
  89 #else
  90                                 Debug( LDAP_DEBUG_ANY,
  91             "%s: line %d: missing host in \"sasl-host <host>\" line\n",
  92                                     fname, lineno, 0 );
  93 #endif
  94
  95                                 return( 1 );
  96                         }
  97
  98                         if ( global_host != NULL ) {
  99 #ifdef NEW_LOGGING
 100                                 LDAP_LOG( CONFIG, CRIT,
 101                                            "%s: line %d: already set sasl-host!\n",
 102                                            fname, lineno, 0 );
 103 #else
 104                                 Debug( LDAP_DEBUG_ANY,
 105                                         "%s: line %d: already set sasl-host!\n",
 106                                         fname, lineno, 0 );
 107 #endif
 108
 109                                 return 1;
 110
 111                         } else {
 112                                 global_host = ch_strdup( cargv[1] );
 113                         }
 114
 115                 /* set SASL realm */
 116                 } else if ( strcasecmp( cargv[0], "sasl-realm" ) == 0 ) {
 117                         if ( cargc < 2 ) {
 118 #ifdef NEW_LOGGING
 119                                 LDAP_LOG( CONFIG, CRIT,
 120                                            "%s: line %d: missing realm in \"sasl-realm <realm>\" line.\n",
 121                                            fname, lineno, 0 );
 122 #else
 123                                 Debug( LDAP_DEBUG_ANY,
 124             "%s: line %d: missing realm in \"sasl-realm <realm>\" line\n",
 125                                     fname, lineno, 0 );
 126 #endif
 127
 128                                 return( 1 );
 129                         }
 130
 131                         if ( global_realm != NULL ) {
 132 #ifdef NEW_LOGGING
 133                                 LDAP_LOG( CONFIG, CRIT,
 134                                            "%s: line %d: already set sasl-realm!\n",
 135                                            fname, lineno, 0 );
 136 #else
 137                                 Debug( LDAP_DEBUG_ANY,
 138                                         "%s: line %d: already set sasl-realm!\n",
 139                                         fname, lineno, 0 );
 140 #endif
 141
 142                                 return 1;
 143
 144                         } else {
 145                                 global_realm = ch_strdup( cargv[1] );
 146                         }
 147
 148                 } else if ( !strcasecmp( cargv[0], "sasl-regexp" )
 149                         || !strcasecmp( cargv[0], "saslregexp" ) )
 150                 {
 151                         int rc;
 152                         if ( cargc != 3 ) {
 153 #ifdef NEW_LOGGING
 154                                 LDAP_LOG( CONFIG, CRIT,
 155                                            "%s: line %d: need 2 args in "
 156                                            "\"saslregexp <match> <replace>\"\n",
 157                                            fname, lineno, 0 );
 158 #else
 159                                 Debug( LDAP_DEBUG_ANY,
 160                                 "%s: line %d: need 2 args in \"saslregexp <match> <replace>\"\n",
 161                                     fname, lineno, 0 );
 162 #endif
 163
 164                                 return( 1 );
 165                         }
 166                         rc = slap_sasl_regexp_config( cargv[1], cargv[2] );
 167                         if ( rc ) {
 168                                 return rc;
 169                         }
 170
 171                 /* SASL security properties */
 172                 } else if ( strcasecmp( cargv[0], "sasl-secprops" ) == 0 ) {
 173                         char *txt;
 174
 175                         if ( cargc < 2 ) {
 176 #ifdef NEW_LOGGING
 177                                 LDAP_LOG( CONFIG, CRIT,
 178                                            "%s: line %d: missing flags in "
 179                                            "\"sasl-secprops <properties>\" line\n",
 180                                            fname, lineno, 0 );
 181 #else
 182                                 Debug( LDAP_DEBUG_ANY,
 183             "%s: line %d: missing flags in \"sasl-secprops <properties>\" line\n",
 184                                     fname, lineno, 0 );
 185 #endif
 186
 187                                 return 1;
 188                         }
 189
 190                         txt = slap_sasl_secprops( cargv[1] );
 191                         if ( txt != NULL ) {
 192 #ifdef NEW_LOGGING
 193                                 LDAP_LOG( CONFIG, CRIT,
 194                                            "%s: line %d sasl-secprops: %s\n",
 195                                            fname, lineno, txt );
 196 #else
 197                                 Debug( LDAP_DEBUG_ANY,
 198             "%s: line %d: sasl-secprops: %s\n",
 199                                     fname, lineno, txt );
 200 #endif
 201
 202                                 return 1;
 203                         }
 204             }
 205
 206             return LDAP_SUCCESS;
 207 }
 208
 209 static int
 210 slap_sasl_log(
 211         void *context,
 212         int priority,
 213         const char *message)
 214 {
 215         Connection *conn = context;
 216         int level;
 217         const char * label;
 218
 219         if ( message == NULL ) {
 220                 return SASL_BADPARAM;
 221         }
 222
 223         switch (priority) {
 224 #if SASL_VERSION_MAJOR >= 2
 225         case SASL_LOG_NONE:
 226                 level = LDAP_DEBUG_NONE;
 227                 label = "None";
 228                 break;
 229         case SASL_LOG_ERR:
 230                 level = LDAP_DEBUG_ANY;
 231                 label = "Error";
 232                 break;
 233         case SASL_LOG_FAIL:
 234                 level = LDAP_DEBUG_ANY;
 235                 label = "Failure";
 236                 break;
 237         case SASL_LOG_WARN:
 238                 level = LDAP_DEBUG_TRACE;
 239                 label = "Warning";
 240                 break;
 241         case SASL_LOG_NOTE:
 242                 level = LDAP_DEBUG_TRACE;
 243                 label = "Notice";
 244                 break;
 245         case SASL_LOG_DEBUG:
 246                 level = LDAP_DEBUG_TRACE;
 247                 label = "Debug";
 248                 break;
 249         case SASL_LOG_TRACE:
 250                 level = LDAP_DEBUG_TRACE;
 251                 label = "Trace";
 252                 break;
 253         case SASL_LOG_PASS:
 254                 level = LDAP_DEBUG_TRACE;
 255                 label = "Password Trace";
 256                 break;
 257 #else
 258         case SASL_LOG_ERR:
 259                 level = LDAP_DEBUG_ANY;
 260                 label = "Error";
 261                 break;
 262         case SASL_LOG_WARNING:
 263                 level = LDAP_DEBUG_TRACE;
 264                 label = "Warning";
 265                 break;
 266         case SASL_LOG_INFO:
 267                 level = LDAP_DEBUG_TRACE;
 268                 label = "Info";
 269                 break;
 270 #endif
 271         default:
 272                 return SASL_BADPARAM;
 273         }
 274
 275 #ifdef NEW_LOGGING
 276         LDAP_LOG( TRANSPORT, ENTRY,
 277                 "SASL [conn=%ld] %s: %s\n", conn ? conn->c_connid : -1, label, message);
 278 #else
 279         Debug( level, "SASL [conn=%ld] %s: %s\n",
 280                 conn ? conn->c_connid: -1,
 281                 label, message );
 282 #endif
 283
 284
 285         return SASL_OK;
 286 }
 287
 288
 289 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
 290    string returned in *dn is in its own allocated memory, and must be free'd
 291    by the calling process.
 292    -Mark Adamson, Carnegie Mellon
 293
 294    The "dn:" prefix is no longer used anywhere inside slapd. It is only used
 295    on strings passed in directly from SASL.
 296    -Howard Chu, Symas Corp.
 297 */
 298
 299 #define SET_DN  1
 300 #define SET_U   2
 301
 302 static struct berval ext_bv = BER_BVC( "EXTERNAL" );
 303
 304 int slap_sasl_getdn( Connection *conn, char *id, int len,
 305         char *user_realm, struct berval *dn, int flags )
 306 {
 307         char *c1;
 308         int rc, is_dn = 0, do_norm = 1;
 309         sasl_conn_t *ctx;
 310         struct berval dn2;
 311
 312 #ifdef NEW_LOGGING
 313         LDAP_LOG( TRANSPORT, ENTRY,
 314                 "slap_sasl_getdn: conn %d id=%s\n",
 315                 conn ? conn->c_connid : -1, id ? (*id ? id : "<empty>") : "NULL", 0 );
 316 #else
 317         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
 318       id?(*id?id:"<empty>"):"NULL",0,0 );
 319 #endif
 320
 321         dn->bv_val = NULL;
 322         dn->bv_len = 0;
 323
 324         if ( id ) {
 325                 if ( len == 0 ) len = strlen( id );
 326
 327                 /* Blatantly anonymous ID */
 328                 if ( len == sizeof("anonymous") - 1 &&
 329                         !strcasecmp( id, "anonymous" ) ) {
 330                         return( LDAP_SUCCESS );
 331                 }
 332         } else {
 333                 len = 0;
 334         }
 335
 336         ctx = conn->c_sasl_context;
 337
 338         /* An authcID needs to be converted to authzID form. Set the
 339          * values directly into *dn; they will be normalized later. (and
 340          * normalizing always makes a new copy.) An ID from a TLS certificate
 341          * is already normalized, so copy it and skip normalization.
 342          */
 343         if( flags & FLAG_GETDN_AUTHCID ) {
 344 #ifdef HAVE_TLS
 345                 if( conn->c_is_tls &&
 346                         conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len &&
 347                         strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 )
 348                 {
 349                         /* X.509 DN is already normalized */
 350                         do_norm = 0;
 351                         is_dn = SET_DN;
 352                         ber_str2bv( id, len, 1, dn );
 353
 354                 } else
 355 #endif
 356                 {
 357                         /* convert to u:<username> form */
 358                         is_dn = SET_U;
 359                         dn->bv_val = id;
 360                         dn->bv_len = len;
 361                 }
 362         }
 363         if( !is_dn ) {
 364                 if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
 365                         is_dn = SET_U;
 366                         dn->bv_val = id+2;
 367                         dn->bv_len = len-2;
 368                 } else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
 369                         is_dn = SET_DN;
 370                         dn->bv_val = id+3;
 371                         dn->bv_len = len-3;
 372                 }
 373         }
 374
 375         /* No other possibilities from here */
 376         if( !is_dn ) {
 377                 dn->bv_val = NULL;
 378                 dn->bv_len = 0;
 379                 return( LDAP_INAPPROPRIATE_AUTH );
 380         }
 381
 382         /* Username strings */
 383         if( is_dn == SET_U ) {
 384                 char *p, *realm;
 385                 len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
 386
 387                 /* username may have embedded realm name */
 388                 if( ( realm = strchr( dn->bv_val, '@') ) ) {
 389                         *realm++ = '\0';
 390                         len += sizeof(",cn=")-2;
 391                 } else if( user_realm && *user_realm ) {
 392                         len += strlen( user_realm ) + sizeof(",cn=")-1;
 393                 }
 394
 395                 if( conn->c_sasl_bind_mech.bv_len ) {
 396                         len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
 397                 }
 398
 399                 /* Build the new dn */
 400                 c1 = dn->bv_val;
 401                 dn->bv_val = ch_malloc( len+1 );
 402                 p = lutil_strcopy( dn->bv_val, "uid=" );
 403                 p = lutil_strncopy( p, c1, dn->bv_len );
 404
 405                 if( realm ) {
 406                         int rlen = dn->bv_len - ( realm - c1 );
 407                         p = lutil_strcopy( p, ",cn=" );
 408                         p = lutil_strncopy( p, realm, rlen );
 409                         realm[-1] = '@';
 410                 } else if( user_realm && *user_realm ) {
 411                         p = lutil_strcopy( p, ",cn=" );
 412                         p = lutil_strcopy( p, user_realm );
 413                 }
 414
 415                 if( conn->c_sasl_bind_mech.bv_len ) {
 416                         p = lutil_strcopy( p, ",cn=" );
 417                         p = lutil_strcopy( p, conn->c_sasl_bind_mech.bv_val );
 418                 }
 419                 p = lutil_strcopy( p, ",cn=auth" );
 420                 dn->bv_len = p - dn->bv_val;
 421
 422 #ifdef NEW_LOGGING
 423                 LDAP_LOG( TRANSPORT, ENTRY,
 424                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val, 0, 0 );
 425 #else
 426                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
 427 #endif
 428         }
 429
 430         /* All strings are in DN form now. Normalize if needed. */
 431         if ( do_norm ) {
 432                 rc = dnNormalize2( NULL, dn, &dn2 );
 433
 434                 /* User DNs were constructed above and must be freed now */
 435                 if ( is_dn == SET_U )
 436                         ch_free( dn->bv_val );
 437
 438                 if ( rc != LDAP_SUCCESS ) {
 439                         dn->bv_val = NULL;
 440                         dn->bv_len = 0;
 441                         return rc;
 442                 }
 443                 *dn = dn2;
 444         }
 445
 446         /* Run thru regexp */
 447         slap_sasl2dn( conn, dn, &dn2 );
 448         if( dn2.bv_val ) {
 449                 ch_free( dn->bv_val );
 450                 *dn = dn2;
 451 #ifdef NEW_LOGGING
 452                 LDAP_LOG( TRANSPORT, ENTRY,
 453                         "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val, 0, 0 );
 454 #else
 455                 Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
 456                         dn->bv_val, 0, 0 );
 457 #endif
 458         }
 459
 460         return( LDAP_SUCCESS );
 461 }
 462
 463 #if SASL_VERSION_MAJOR >= 2
 464 static const char *slap_propnames[] = {
 465         "*slapConn", "*authcDN", "*authzDN", NULL };
 466
 467 static Filter *generic_filter;
 468
 469 #define PROP_CONN       0
 470 #define PROP_AUTHC      1
 471 #define PROP_AUTHZ      2
 472
 473 typedef struct lookup_info {
 474         int last;
 475         int flags;
 476         const struct propval *list;
 477         sasl_server_params_t *sparams;
 478 } lookup_info;
 479
 480 static int
 481 sasl_ap_lookup(
 482         BackendDB *be,
 483         Connection *conn,
 484         Operation *op,
 485         Entry *e,
 486         AttributeName *an,
 487         int attrsonly,
 488         LDAPControl **ctrls )
 489 {
 490         BerVarray bv;
 491         AttributeDescription *ad;
 492         Attribute *a;
 493         const char *text;
 494         int rc, i;
 495         slap_callback *tmp = op->o_callback;
 496         lookup_info *sl = tmp->sc_private;
 497
 498         for( i = 0; i < sl->last; i++ ) {
 499                 const char *name = sl->list[i].name;
 500
 501                 if ( name[0] == '*' ) {
 502                         if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
 503                         name++;
 504                 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
 505                         continue;
 506
 507                 if ( sl->list[i].values ) {
 508                         if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
 509                 }
 510                 ad = NULL;
 511                 rc = slap_str2ad( name, &ad, &text );
 512                 if ( rc != LDAP_SUCCESS ) {
 513 #ifdef NEW_LOGGING
 514                         LDAP_LOG( TRANSPORT, DETAIL1,
 515                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 516 #else
 517                         Debug( LDAP_DEBUG_TRACE,
 518                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 519 #endif
 520                         continue;
 521                 }
 522                 a = attr_find( e->e_attrs, ad );
 523                 if ( !a ) continue;
 524                 if ( ! access_allowed( be, conn, op, e, ad, NULL, ACL_AUTH, NULL ) )
 525                         continue;
 526                 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) )
 527                         sl->sparams->utils->prop_erase( sl->sparams->propctx, sl->list[i].name );
 528                 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
 529                         sl->sparams->utils->prop_set( sl->sparams->propctx, sl->list[i].name,
 530                                 bv->bv_val, bv->bv_len );
 531                 }
 532         }
 533         return LDAP_SUCCESS;
 534 }
 535
 536 static void
 537 slap_auxprop_lookup(
 538         void *glob_context,
 539         sasl_server_params_t *sparams,
 540         unsigned flags,
 541         const char *user,
 542         unsigned ulen)
 543 {
 544         int rc, i, doit=0;
 545         struct berval dn;
 546         Connection *conn = NULL;
 547         lookup_info sl;
 548
 549         sl.list = sparams->utils->prop_get( sparams->propctx );
 550         sl.sparams = sparams;
 551         sl.flags = flags;
 552
 553         /* Find our DN and conn first */
 554         for( i = 0, sl.last = 0; sl.list[i].name; i++ ) {
 555                 if ( sl.list[i].name[0] == '*' ) {
 556                         if ( !strcmp( sl.list[i].name, slap_propnames[PROP_CONN] ) ) {
 557                                 if ( sl.list[i].values && sl.list[i].values[0] )
 558                                         AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
 559                                 if ( !sl.last ) sl.last = i;
 560                         }
 561                         if ( (flags & SASL_AUXPROP_AUTHZID) &&
 562                                 !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHZ] ) ) {
 563
 564                                 if ( sl.list[i].values && sl.list[i].values[0] )
 565                                         AC_MEMCPY( &dn, sl.list[i].values[0], sizeof( dn ) );
 566                                 if ( !sl.last ) sl.last = i;
 567                                 break;
 568                         }
 569                         if ( !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHC] ) ) {
 570                                 if ( !sl.last ) sl.last = i;
 571                                 if ( sl.list[i].values && sl.list[i].values[0] ) {
 572                                         AC_MEMCPY( &dn, sl.list[i].values[0], sizeof( dn ) );
 573                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 574                                                 break;
 575                                 }
 576                         }
 577                 }
 578         }
 579
 580         /* Now see what else needs to be fetched */
 581         for( i = 0; i < sl.last; i++ ) {
 582                 const char *name = sl.list[i].name;
 583
 584                 if ( name[0] == '*' ) {
 585                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 586                         name++;
 587                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 588                         continue;
 589
 590                 if ( sl.list[i].values ) {
 591                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 592                 }
 593                 doit = 1;
 594         }
 595
 596         if (doit) {
 597                 Backend *be;
 598                 Operation op = {0};
 599                 slap_callback cb = { slap_cb_null_response,
 600                         slap_cb_null_sresult, sasl_ap_lookup, NULL };
 601
 602                 cb.sc_private = &sl;
 603
 604                 be = select_backend( &dn, 0, 1 );
 605
 606                 if ( be && be->be_search ) {
 607                         op.o_tag = LDAP_REQ_SEARCH;
 608                         op.o_protocol = LDAP_VERSION3;
 609                         op.o_ndn = conn->c_ndn;
 610                         op.o_callback = &cb;
 611                         op.o_time = slap_get_time();
 612                         op.o_do_not_cache = 1;
 613                         op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
 614
 615                         (*be->be_search)( be, conn, &op, NULL, &dn,
 616                                 LDAP_SCOPE_BASE, LDAP_DEREF_NEVER, 1, 0,
 617                                 generic_filter, NULL, NULL, 0 );
 618                 }
 619         }
 620 }
 621
 622 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 623         0,      /* Features */
 624         0,      /* spare */
 625         NULL,   /* glob_context */
 626         NULL,   /* auxprop_free */
 627         slap_auxprop_lookup,
 628         "slapd",        /* name */
 629         NULL    /* spare */
 630 };
 631
 632 static int
 633 slap_auxprop_init(
 634         const sasl_utils_t *utils,
 635         int max_version,
 636         int *out_version,
 637         sasl_auxprop_plug_t **plug,
 638         const char *plugname)
 639 {
 640         if ( !out_version | !plug ) return SASL_BADPARAM;
 641
 642         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 643
 644         *out_version = SASL_AUXPROP_PLUG_VERSION;
 645         *plug = &slap_auxprop_plugin;
 646         return SASL_OK;
 647 }
 648
 649 typedef struct checkpass_info {
 650         int rc;
 651         struct berval cred;
 652 } checkpass_info;
 653
 654 static int
 655 sasl_cb_checkpass(
 656         BackendDB *be,
 657         Connection *conn,
 658         Operation *op,
 659         Entry *e,
 660         AttributeName *an,
 661         int attrsonly,
 662         LDAPControl **ctrls )
 663 {
 664         slap_callback *tmp = op->o_callback;
 665         checkpass_info *ci = tmp->sc_private;
 666         Attribute *a;
 667         struct berval *bv;
 668
 669         ci->rc = SASL_NOVERIFY;
 670
 671         a = attr_find( e->e_attrs, slap_schema.si_ad_userPassword );
 672         if ( !a ) return 0;
 673         if ( ! access_allowed( be, conn, op, e, slap_schema.si_ad_userPassword,
 674                 NULL, ACL_AUTH, NULL ) ) return 0;
 675
 676         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 677                 if ( !lutil_passwd( bv, &ci->cred, NULL ) ) {
 678                         ci->rc = SASL_OK;
 679                         break;
 680                 }
 681         }
 682         return 0;
 683 }
 684
 685 static int
 686 slap_sasl_checkpass(
 687         sasl_conn_t *sconn,
 688         void *context,
 689         const char *username,
 690         const char *pass,
 691         unsigned passlen,
 692         struct propctx *propctx)
 693 {
 694         Connection *conn = (Connection *)context;
 695         struct berval dn;
 696         int rc;
 697         Backend *be;
 698         checkpass_info ci;
 699
 700         ci.rc = SASL_NOUSER;
 701
 702         /* SASL will fallback to its own mechanisms if we don't
 703          * find an answer here.
 704          */
 705
 706         rc = slap_sasl_getdn( conn, (char *)username, 0, NULL, &dn,
 707                 FLAG_GETDN_AUTHCID );
 708         if ( rc != LDAP_SUCCESS ) {
 709                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 710                 return SASL_NOUSER;
 711         }
 712
 713         if ( dn.bv_len == 0 ) {
 714                 sasl_seterror( sconn, 0,
 715                         "No password is associated with the Root DSE" );
 716                 if ( dn.bv_val != NULL ) {
 717                         ch_free( dn.bv_val );
 718                 }
 719                 return SASL_NOUSER;
 720         }
 721
 722         be = select_backend( &dn, 0, 1 );
 723         if ( be && be->be_search ) {
 724                 Operation op = {0};
 725                 slap_callback cb = { slap_cb_null_response,
 726                         slap_cb_null_sresult, sasl_cb_checkpass, NULL };
 727
 728                 ci.cred.bv_val = (char *)pass;
 729                 ci.cred.bv_len = passlen;
 730
 731                 cb.sc_private = &ci;
 732                 op.o_tag = LDAP_REQ_SEARCH;
 733                 op.o_protocol = LDAP_VERSION3;
 734                 op.o_ndn = conn->c_ndn;
 735                 op.o_callback = &cb;
 736                 op.o_time = slap_get_time();
 737                 op.o_do_not_cache = 1;
 738                 op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
 739
 740                 (*be->be_search)( be, conn, &op, NULL, &dn,
 741                         LDAP_SCOPE_BASE, LDAP_DEREF_NEVER, 1, 0,
 742                         generic_filter, NULL, NULL, 0 );
 743         }
 744         if ( ci.rc != SASL_OK ) {
 745                 sasl_seterror( sconn, 0,
 746                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 747         }
 748
 749         ch_free( dn.bv_val );
 750
 751         return ci.rc;
 752 }
 753
 754 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 755  * auxiliary property, so that we can refer to it in sasl_authorize
 756  * without interfering with anything else. Also, the SASL username
 757  * buffer is constrained to 256 characters, and our DNs could be
 758  * much longer (totally arbitrary length)...
 759  */
 760 static int
 761 slap_sasl_canonicalize(
 762         sasl_conn_t *sconn,
 763         void *context,
 764         const char *in,
 765         unsigned inlen,
 766         unsigned flags,
 767         const char *user_realm,
 768         char *out,
 769         unsigned out_max,
 770         unsigned *out_len)
 771 {
 772         Connection *conn = (Connection *)context;
 773         struct propctx *props = sasl_auxprop_getctx( sconn );
 774         struct propval auxvals[3];
 775         struct berval dn;
 776         int rc, which;
 777         const char *names[2];
 778
 779         *out_len = 0;
 780
 781 #ifdef NEW_LOGGING
 782         LDAP_LOG( TRANSPORT, ENTRY,
 783                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 784                 conn ? conn->c_connid : -1,
 785                 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid", in ? in : "<empty>");
 786 #else
 787         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 788                 "%s=\"%s\"\n",
 789                         conn ? conn->c_connid : -1,
 790                         (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 791                         in ? in : "<empty>" );
 792 #endif
 793
 794         /* If name is too big, just truncate. We don't care, we're
 795          * using DNs, not the usernames.
 796          */
 797         if ( inlen > out_max )
 798                 inlen = out_max-1;
 799
 800         /* See if we need to add request, can only do it once */
 801         prop_getnames( props, slap_propnames, auxvals );
 802         if ( !auxvals[0].name )
 803                 prop_request( props, slap_propnames );
 804
 805         if ( flags & SASL_CU_AUTHID )
 806                 which = PROP_AUTHC;
 807         else
 808                 which = PROP_AUTHZ;
 809
 810         /* Need to store the Connection for auxprop_lookup */
 811         if ( !auxvals[PROP_CONN].values ) {
 812                 names[0] = slap_propnames[PROP_CONN];
 813                 names[1] = NULL;
 814                 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
 815         }
 816
 817         /* Already been here? */
 818         if ( auxvals[which].values )
 819                 goto done;
 820
 821         if ( flags == SASL_CU_AUTHZID ) {
 822         /* If we got unqualified authzid's, they probably came from SASL
 823          * itself just passing the authcid to us. Look inside the oparams
 824          * structure to see if that's true. (HACK: the out_len pointer is
 825          * the address of a member of a sasl_out_params_t structure...)
 826          */
 827                 sasl_out_params_t dummy;
 828                 int offset = (void *)&dummy.ulen - (void *)&dummy.authid;
 829                 char **authid = (void *)out_len - offset;
 830                 if ( *authid && !strcmp( in, *authid ) )
 831                         goto done;
 832         }
 833
 834         rc = slap_sasl_getdn( conn, (char *)in, inlen, (char *)user_realm, &dn,
 835                 (flags & SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
 836         if ( rc != LDAP_SUCCESS ) {
 837                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 838                 return SASL_NOAUTHZ;
 839         }
 840
 841         names[0] = slap_propnames[which];
 842         names[1] = NULL;
 843
 844         prop_set( props, names[0], (char *)&dn, sizeof( dn ) );
 845
 846 #ifdef NEW_LOGGING
 847         LDAP_LOG( TRANSPORT, ENTRY,
 848                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 849                 conn ? conn->c_connid : -1, names[0]+1, dn.bv_val );
 850 #else
 851         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 852                 "%s=\"%s\"\n",
 853                         conn ? conn->c_connid : -1,
 854                         names[0]+1, dn.bv_val );
 855 #endif
 856 done:   AC_MEMCPY( out, in, inlen );
 857         out[inlen] = '\0';
 858
 859         *out_len = inlen;
 860
 861         return SASL_OK;
 862 }
 863
 864 static int
 865 slap_sasl_authorize(
 866         sasl_conn_t *sconn,
 867         void *context,
 868         char *requested_user,
 869         unsigned rlen,
 870         char *auth_identity,
 871         unsigned alen,
 872         const char *def_realm,
 873         unsigned urlen,
 874         struct propctx *props)
 875 {
 876         Connection *conn = (Connection *)context;
 877         struct propval auxvals[3];
 878         struct berval authcDN, authzDN;
 879         int rc;
 880
 881 #ifdef NEW_LOGGING
 882         LDAP_LOG( TRANSPORT, ENTRY,
 883                 "slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
 884                 conn ? conn->c_connid : -1, auth_identity, requested_user);
 885 #else
 886         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 887                 "authcid=\"%s\" authzid=\"%s\"\n",
 888                 conn ? conn->c_connid : -1, auth_identity, requested_user );
 889 #endif
 890         if ( conn->c_sasl_dn.bv_val ) {
 891                 ch_free( conn->c_sasl_dn.bv_val );
 892                 conn->c_sasl_dn.bv_val = NULL;
 893                 conn->c_sasl_dn.bv_len = 0;
 894         }
 895
 896         /* Skip PROP_CONN */
 897         prop_getnames( props, slap_propnames+1, auxvals );
 898
 899         AC_MEMCPY( &authcDN, auxvals[0].values[0], sizeof(authcDN) );
 900
 901         /* Nothing to do if no authzID was given */
 902         if ( !auxvals[1].name || !auxvals[1].values ) {
 903                 conn->c_sasl_dn = authcDN;
 904                 return SASL_OK;
 905         }
 906
 907         AC_MEMCPY( &authzDN, auxvals[1].values[0], sizeof(authzDN) );
 908
 909         rc = slap_sasl_authorized( conn, &authcDN, &authzDN );
 910         ch_free( authcDN.bv_val );
 911         if ( rc != LDAP_SUCCESS ) {
 912 #ifdef NEW_LOGGING
 913                 LDAP_LOG( TRANSPORT, INFO,
 914                         "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 915                         (long)(conn ? conn->c_connid : -1), rc, 0 );
 916 #else
 917                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 918                         " authorization disallowed (%d)\n",
 919                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 920 #endif
 921
 922                 sasl_seterror( sconn, 0, "not authorized" );
 923                 ch_free( authzDN.bv_val );
 924                 return SASL_NOAUTHZ;
 925         }
 926
 927         conn->c_sasl_dn = authzDN;
 928
 929 #ifdef NEW_LOGGING
 930         LDAP_LOG( TRANSPORT, ENTRY,
 931                 "slap_sasl_authorize: conn %d authorization allowed\n",
 932                 (long)(conn ? conn->c_connid : -1), 0, 0 );
 933 #else
 934         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 935                 " authorization allowed\n",
 936                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 937 #endif
 938         return SASL_OK;
 939 }
 940 #else
 941 static int
 942 slap_sasl_authorize(
 943         void *context,
 944         char *authcid,
 945         char *authzid,
 946         const char **user,
 947         const char **errstr)
 948 {
 949         struct berval authcDN, authzDN;
 950         int rc;
 951         Connection *conn = context;
 952         char *realm;
 953
 954         *user = NULL;
 955         if ( conn->c_sasl_dn.bv_val ) {
 956                 ch_free( conn->c_sasl_dn.bv_val );
 957                 conn->c_sasl_dn.bv_val = NULL;
 958                 conn->c_sasl_dn.bv_len = 0;
 959         }
 960
 961 #ifdef NEW_LOGGING
 962         LDAP_LOG( TRANSPORT, ENTRY,
 963                 "slap_sasl_authorize: conn %d    authcid=\"%s\" authzid=\"%s\"\n",
 964                 conn ? conn->c_connid : -1, authcid ? authcid : "<empty>",
 965                 authzid ? authzid : "<empty>" );
 966 #else
 967         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 968                 "authcid=\"%s\" authzid=\"%s\"\n",
 969                 (long) (conn ? conn->c_connid : -1),
 970                 authcid ? authcid : "<empty>",
 971                 authzid ? authzid : "<empty>" );
 972 #endif
 973
 974         /* Figure out how much data we have for the dn */
 975         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 976         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 977 #ifdef NEW_LOGGING
 978                 LDAP_LOG( TRANSPORT, ERR,
 979                         "slap_sasl_authorize: getprop(REALM) failed.\n", 0, 0, 0 );
 980 #else
 981                 Debug(LDAP_DEBUG_TRACE,
 982                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 983 #endif
 984                 *errstr = "Could not extract realm";
 985                 return SASL_NOAUTHZ;
 986         }
 987
 988         /* Convert the identities to DN's. If no authzid was given, client will
 989            be bound as the DN matching their username */
 990         rc = slap_sasl_getdn( conn, (char *)authcid, 0, realm, &authcDN, FLAG_GETDN_AUTHCID );
 991         if( rc != LDAP_SUCCESS ) {
 992                 *errstr = ldap_err2string( rc );
 993                 return SASL_NOAUTHZ;
 994         }
 995         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 996 #ifdef NEW_LOGGING
 997                 LDAP_LOG( TRANSPORT, ENTRY,
 998                         "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 999                         conn ? conn->c_connid : -1, authcDN.bv_val, 0 );
1000 #else
1001                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
1002                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
1003 #endif
1004
1005                 conn->c_sasl_dn = authcDN;
1006                 *errstr = NULL;
1007                 return SASL_OK;
1008         }
1009         rc = slap_sasl_getdn( conn, (char *)authzid, 0, realm, &authzDN, FLAG_GETDN_AUTHZID );
1010         if( rc != LDAP_SUCCESS ) {
1011                 ch_free( authcDN.bv_val );
1012                 *errstr = ldap_err2string( rc );
1013                 return SASL_NOAUTHZ;
1014         }
1015
1016         rc = slap_sasl_authorized(conn, &authcDN, &authzDN );
1017         ch_free( authcDN.bv_val );
1018         if( rc ) {
1019 #ifdef NEW_LOGGING
1020                 LDAP_LOG( TRANSPORT, INFO,
1021                         "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
1022                         (long)(conn ? conn->c_connid : -1), rc, 0 );
1023 #else
1024                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
1025                         " authorization disallowed (%d)\n",
1026                         (long) (conn ? conn->c_connid : -1), rc, 0 );
1027 #endif
1028
1029                 *errstr = "not authorized";
1030                 ch_free( authzDN.bv_val );
1031                 return SASL_NOAUTHZ;
1032         }
1033
1034 #ifdef NEW_LOGGING
1035         LDAP_LOG( TRANSPORT, RESULTS,
1036                 "slap_sasl_authorize: conn %d authorization allowed\n",
1037            (long)(conn ? conn->c_connid : -1 ), 0, 0 );
1038 #else
1039         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
1040                 " authorization allowed\n",
1041                 (long) (conn ? conn->c_connid : -1), 0, 0 );
1042 #endif
1043
1044         conn->c_sasl_dn = authzDN;
1045         *errstr = NULL;
1046         return SASL_OK;
1047 }
1048 #endif /* SASL_VERSION_MAJOR >= 2 */
1049
1050 static int
1051 slap_sasl_err2ldap( int saslerr )
1052 {
1053         int rc;
1054
1055         switch (saslerr) {
1056                 case SASL_CONTINUE:
1057                         rc = LDAP_SASL_BIND_IN_PROGRESS;
1058                         break;
1059                 case SASL_FAIL:
1060                         rc = LDAP_OTHER;
1061                         break;
1062                 case SASL_NOMEM:
1063                         rc = LDAP_OTHER;
1064                         break;
1065                 case SASL_NOMECH:
1066                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1067                         break;
1068                 case SASL_BADAUTH:
1069                         rc = LDAP_INVALID_CREDENTIALS;
1070                         break;
1071                 case SASL_NOAUTHZ:
1072                         rc = LDAP_INSUFFICIENT_ACCESS;
1073                         break;
1074                 case SASL_TOOWEAK:
1075                 case SASL_ENCRYPT:
1076                         rc = LDAP_INAPPROPRIATE_AUTH;
1077                         break;
1078                 default:
1079                         rc = LDAP_OTHER;
1080                         break;
1081         }
1082
1083         return rc;
1084 }
1085 #endif
1086
1087
1088 int slap_sasl_init( void )
1089 {
1090 #ifdef HAVE_CYRUS_SASL
1091         int rc;
1092         static sasl_callback_t server_callbacks[] = {
1093                 { SASL_CB_LOG, &slap_sasl_log, NULL },
1094                 { SASL_CB_LIST_END, NULL, NULL }
1095         };
1096
1097 #ifdef HAVE_SASL_VERSION
1098 #define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
1099         (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
1100
1101         sasl_version( NULL, &rc );
1102         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
1103                 (rc & 0xffff) < SASL_VERSION_STEP) {
1104
1105 #ifdef NEW_LOGGING
1106                 LDAP_LOG( TRANSPORT, INFO,
1107                 "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
1108                         rc, SASL_BUILD_VERSION, 0 );
1109 #else
1110                 Debug( LDAP_DEBUG_ANY,
1111                 "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
1112                         rc, SASL_BUILD_VERSION, 0 );
1113 #endif
1114                 return -1;
1115         }
1116 #endif
1117
1118         sasl_set_alloc(
1119                 ber_memalloc,
1120                 ber_memcalloc,
1121                 ber_memrealloc,
1122                 ber_memfree );
1123
1124         sasl_set_mutex(
1125                 ldap_pvt_sasl_mutex_new,
1126                 ldap_pvt_sasl_mutex_lock,
1127                 ldap_pvt_sasl_mutex_unlock,
1128                 ldap_pvt_sasl_mutex_dispose );
1129
1130 #if SASL_VERSION_MAJOR >= 2
1131         sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
1132 #endif
1133         /* should provide callbacks for logging */
1134         /* server name should be configurable */
1135         rc = sasl_server_init( server_callbacks, "slapd" );
1136
1137         if( rc != SASL_OK ) {
1138 #ifdef NEW_LOGGING
1139                 LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: init failed.\n", 0, 0, 0 );
1140 #else
1141                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
1142                         0, 0, 0 );
1143 #endif
1144 #if SASL_VERSION_MAJOR < 2
1145                 /* A no-op used to make sure we linked with Cyrus 1.5 */
1146                 sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
1147 #endif
1148
1149                 return -1;
1150         }
1151
1152 #ifdef NEW_LOGGING
1153         LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: initialized!\n", 0, 0, 0 );
1154 #else
1155         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1156                 0, 0, 0 );
1157 #endif
1158
1159
1160         /* default security properties */
1161         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1162         sasl_secprops.max_ssf = INT_MAX;
1163         sasl_secprops.maxbufsize = 65536;
1164         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1165 #endif
1166
1167         return 0;
1168 }
1169
1170 int slap_sasl_destroy( void )
1171 {
1172 #ifdef HAVE_CYRUS_SASL
1173         sasl_done();
1174 #endif
1175 #if SASL_VERSION_MAJOR >= 2
1176         filter_free( generic_filter );
1177 #endif
1178         free( global_host );
1179         global_host = NULL;
1180
1181         return 0;
1182 }
1183
1184 int slap_sasl_open( Connection *conn )
1185 {
1186         int cb, sc = LDAP_SUCCESS;
1187 #if SASL_VERSION_MAJOR >= 2
1188         char *ipremoteport = NULL, *iplocalport = NULL;
1189 #endif
1190
1191 #ifdef HAVE_CYRUS_SASL
1192         sasl_conn_t *ctx = NULL;
1193         sasl_callback_t *session_callbacks;
1194
1195         assert( conn->c_sasl_context == NULL );
1196         assert( conn->c_sasl_extra == NULL );
1197
1198         conn->c_sasl_layers = 0;
1199
1200         session_callbacks =
1201 #if SASL_VERSION_MAJOR >= 2
1202                 ch_calloc( 5, sizeof(sasl_callback_t));
1203 #else
1204                 ch_calloc( 3, sizeof(sasl_callback_t));
1205 #endif
1206         conn->c_sasl_extra = session_callbacks;
1207
1208         session_callbacks[cb=0].id = SASL_CB_LOG;
1209         session_callbacks[cb].proc = &slap_sasl_log;
1210         session_callbacks[cb++].context = conn;
1211
1212         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1213         session_callbacks[cb].proc = &slap_sasl_authorize;
1214         session_callbacks[cb++].context = conn;
1215
1216 #if SASL_VERSION_MAJOR >= 2
1217         session_callbacks[cb].id = SASL_CB_CANON_USER;
1218         session_callbacks[cb].proc = &slap_sasl_canonicalize;
1219         session_callbacks[cb++].context = conn;
1220
1221         /* XXXX: this should be conditional */
1222         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
1223         session_callbacks[cb].proc = &slap_sasl_checkpass;
1224         session_callbacks[cb++].context = conn;
1225 #endif
1226
1227         session_callbacks[cb].id = SASL_CB_LIST_END;
1228         session_callbacks[cb].proc = NULL;
1229         session_callbacks[cb++].context = NULL;
1230
1231         if( global_host == NULL ) {
1232                 global_host = ldap_pvt_get_fqdn( NULL );
1233         }
1234
1235         /* create new SASL context */
1236 #if SASL_VERSION_MAJOR >= 2
1237         if ( generic_filter == NULL ) {
1238                 generic_filter = str2filter( "(objectclass=*)" );
1239         }
1240         if ( conn->c_sock_name.bv_len != 0 &&
1241              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
1242                 char *p;
1243
1244                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
1245                 /* Convert IPv6 addresses to address;port syntax. */
1246                 p = strrchr( iplocalport, ' ' );
1247                 /* Convert IPv4 addresses to address;port syntax. */
1248                 if ( p == NULL ) p = strchr( iplocalport, ':' );
1249                 if ( p != NULL ) {
1250                         *p = ';';
1251                 }
1252         }
1253         if ( conn->c_peer_name.bv_len != 0 &&
1254              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
1255                 char *p;
1256
1257                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
1258                 /* Convert IPv6 addresses to address;port syntax. */
1259                 p = strrchr( ipremoteport, ' ' );
1260                 /* Convert IPv4 addresses to address;port syntax. */
1261                 if ( p == NULL ) p = strchr( ipremoteport, ':' );
1262                 if ( p != NULL ) {
1263                         *p = ';';
1264                 }
1265         }
1266         sc = sasl_server_new( "ldap", global_host, global_realm,
1267                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
1268         if ( iplocalport != NULL ) {
1269                 ch_free( iplocalport );
1270         }
1271         if ( ipremoteport != NULL ) {
1272                 ch_free( ipremoteport );
1273         }
1274 #else
1275         sc = sasl_server_new( "ldap", global_host, global_realm,
1276                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
1277 #endif
1278
1279         if( sc != SASL_OK ) {
1280 #ifdef NEW_LOGGING
1281                 LDAP_LOG( TRANSPORT, ERR,
1282                         "slap_sasl_open: sasl_server_new failed: %d\n", sc, 0, 0 );
1283 #else
1284                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1285                         sc, 0, 0 );
1286 #endif
1287
1288                 return -1;
1289         }
1290
1291         conn->c_sasl_context = ctx;
1292
1293         if( sc == SASL_OK ) {
1294                 sc = sasl_setprop( ctx,
1295                         SASL_SEC_PROPS, &sasl_secprops );
1296
1297                 if( sc != SASL_OK ) {
1298 #ifdef NEW_LOGGING
1299                         LDAP_LOG( TRANSPORT, ERR,
1300                                 "slap_sasl_open: sasl_setprop failed: %d \n", sc, 0, 0 );
1301 #else
1302                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1303                                 sc, 0, 0 );
1304 #endif
1305
1306                         slap_sasl_close( conn );
1307                         return -1;
1308                 }
1309         }
1310
1311         sc = slap_sasl_err2ldap( sc );
1312 #endif
1313         return sc;
1314 }
1315
1316 int slap_sasl_external(
1317         Connection *conn,
1318         slap_ssf_t ssf,
1319         const char *auth_id )
1320 {
1321 #if SASL_VERSION_MAJOR >= 2
1322         int sc;
1323         sasl_conn_t *ctx = conn->c_sasl_context;
1324
1325         if ( ctx == NULL ) {
1326                 return LDAP_UNAVAILABLE;
1327         }
1328
1329         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1330
1331         if ( sc != SASL_OK ) {
1332                 return LDAP_OTHER;
1333         }
1334
1335         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
1336
1337         if ( sc != SASL_OK ) {
1338                 return LDAP_OTHER;
1339         }
1340
1341 #elif defined(HAVE_CYRUS_SASL)
1342         int sc;
1343         sasl_conn_t *ctx = conn->c_sasl_context;
1344         sasl_external_properties_t extprops;
1345
1346         if ( ctx == NULL ) {
1347                 return LDAP_UNAVAILABLE;
1348         }
1349
1350         memset( &extprops, '\0', sizeof(extprops) );
1351         extprops.ssf = ssf;
1352         extprops.auth_id = (char *) auth_id;
1353
1354         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1355                 (void *) &extprops );
1356
1357         if ( sc != SASL_OK ) {
1358                 return LDAP_OTHER;
1359         }
1360 #endif
1361
1362         return LDAP_SUCCESS;
1363 }
1364
1365 int slap_sasl_reset( Connection *conn )
1366 {
1367 #ifdef HAVE_CYRUS_SASL
1368         sasl_conn_t *ctx = conn->c_sasl_context;
1369
1370         if( ctx != NULL ) {
1371         }
1372 #endif
1373         /* must return "anonymous" */
1374         return LDAP_SUCCESS;
1375 }
1376
1377 char ** slap_sasl_mechs( Connection *conn )
1378 {
1379         char **mechs = NULL;
1380
1381 #ifdef HAVE_CYRUS_SASL
1382         sasl_conn_t *ctx = conn->c_sasl_context;
1383
1384         if( ctx != NULL ) {
1385                 int sc;
1386                 SASL_CONST char *mechstr;
1387
1388                 sc = sasl_listmech( ctx,
1389                         NULL, NULL, ",", NULL,
1390                         &mechstr, NULL, NULL );
1391
1392                 if( sc != SASL_OK ) {
1393 #ifdef NEW_LOGGING
1394                         LDAP_LOG( TRANSPORT, ERR,
1395                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc, 0, 0 );
1396 #else
1397                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1398                                 sc, 0, 0 );
1399 #endif
1400
1401                         return NULL;
1402                 }
1403
1404                 mechs = ldap_str2charray( mechstr, "," );
1405
1406 #if SASL_VERSION_MAJOR < 2
1407                 ch_free( mechstr );
1408 #endif
1409         }
1410 #endif
1411
1412         return mechs;
1413 }
1414
1415 int slap_sasl_close( Connection *conn )
1416 {
1417 #ifdef HAVE_CYRUS_SASL
1418         sasl_conn_t *ctx = conn->c_sasl_context;
1419
1420         if( ctx != NULL ) {
1421                 sasl_dispose( &ctx );
1422         }
1423
1424         conn->c_sasl_context = NULL;
1425
1426         free( conn->c_sasl_extra );
1427         conn->c_sasl_extra = NULL;
1428 #endif
1429
1430         return LDAP_SUCCESS;
1431 }
1432
1433 int slap_sasl_bind(
1434     Connection          *conn,
1435     Operation           *op,
1436     struct berval       *dn,
1437     struct berval       *ndn,
1438     struct berval       *cred,
1439         struct berval                   *edn,
1440         slap_ssf_t              *ssfp )
1441 {
1442         int rc = 1;
1443
1444 #ifdef HAVE_CYRUS_SASL
1445         sasl_conn_t *ctx = conn->c_sasl_context;
1446         struct berval response;
1447         unsigned reslen = 0;
1448         const char *errstr = NULL;
1449         int sc;
1450
1451 #ifdef NEW_LOGGING
1452         LDAP_LOG( TRANSPORT, ENTRY,
1453                 "sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1454                 dn->bv_len ? dn->bv_val : "",
1455                 conn->c_sasl_bind_in_progress ? "<continuing>" :
1456                 conn->c_sasl_bind_mech.bv_val,
1457                 cred ? cred->bv_len : 0 );
1458 #else
1459         Debug(LDAP_DEBUG_ARGS,
1460                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1461                 dn->bv_len ? dn->bv_val : "",
1462                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
1463                 cred ? cred->bv_len : 0 );
1464 #endif
1465
1466
1467         if( ctx == NULL ) {
1468                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
1469                         NULL, "SASL unavailable on this session", NULL, NULL );
1470                 return rc;
1471         }
1472
1473 #if SASL_VERSION_MAJOR >= 2
1474 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1475         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1476 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1477         sasl_server_step( ctx, cred, clen, resp, rlen )
1478 #else
1479 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1480         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
1481 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1482         sasl_server_step( ctx, cred, clen, resp, rlen, err )
1483 #endif
1484
1485         if ( !conn->c_sasl_bind_in_progress ) {
1486                 sc = START( ctx,
1487                         conn->c_sasl_bind_mech.bv_val,
1488                         cred->bv_len ? cred->bv_val : "",
1489                         cred->bv_len,
1490                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1491
1492         } else {
1493                 sc = STEP( ctx,
1494                         cred->bv_val, cred->bv_len,
1495                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1496         }
1497
1498         response.bv_len = reslen;
1499
1500         if ( sc == SASL_OK ) {
1501                 sasl_ssf_t *ssf = NULL;
1502
1503                 *edn = conn->c_sasl_dn;
1504                 conn->c_sasl_dn.bv_val = NULL;
1505                 conn->c_sasl_dn.bv_len = 0;
1506
1507                 rc = LDAP_SUCCESS;
1508
1509                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1510                 *ssfp = ssf ? *ssf : 0;
1511
1512                 if( *ssfp ) {
1513                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1514                         conn->c_sasl_layers++;
1515                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1516                 }
1517
1518                 send_ldap_sasl( conn, op, rc,
1519                         NULL, NULL, NULL, NULL,
1520                         response.bv_len ? &response : NULL );
1521
1522         } else if ( sc == SASL_CONTINUE ) {
1523                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1524                         NULL, NULL, NULL, NULL, &response );
1525
1526         } else {
1527 #if SASL_VERSION_MAJOR >= 2
1528                 errstr = sasl_errdetail( ctx );
1529 #endif
1530                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1531                         NULL, errstr, NULL, NULL );
1532         }
1533
1534 #if SASL_VERSION_MAJOR < 2
1535         if( response.bv_len ) {
1536                 ch_free( response.bv_val );
1537         }
1538 #endif
1539
1540 #ifdef NEW_LOGGING
1541         LDAP_LOG( TRANSPORT, RESULTS, "slap_sasl_bind: rc=%d\n", rc, 0, 0 );
1542 #else
1543         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1544 #endif
1545
1546
1547 #else
1548         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1549                 NULL, "SASL not supported", NULL, NULL );
1550 #endif
1551
1552         return rc;
1553 }
1554
1555 char* slap_sasl_secprops( const char *in )
1556 {
1557 #ifdef HAVE_CYRUS_SASL
1558         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1559
1560         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1561 #else
1562         return "SASL not supported";
1563 #endif
1564 }
1565
1566 #ifdef HAVE_CYRUS_SASL
1567 int
1568 slap_sasl_setpass(
1569         Connection      *conn,
1570         Operation       *op,
1571         const char      *reqoid,
1572         struct berval   *reqdata,
1573         char            **rspoid,
1574         struct berval   **rspdata,
1575         LDAPControl     *** rspctrls,
1576         const char      **text )
1577 {
1578         int rc;
1579         struct berval id = { 0, NULL }; /* needs to come from connection */
1580         struct berval new = { 0, NULL };
1581         struct berval old = { 0, NULL };
1582
1583         assert( reqoid != NULL );
1584         assert( strcmp( LDAP_EXOP_MODIFY_PASSWD, reqoid ) == 0 );
1585
1586         rc = sasl_getprop( conn->c_sasl_context, SASL_USERNAME,
1587                 (SASL_CONST void **)&id.bv_val );
1588
1589         if( rc != SASL_OK ) {
1590                 *text = "unable to retrieve SASL username";
1591                 rc = LDAP_OTHER;
1592                 goto done;
1593         }
1594
1595 #ifdef NEW_LOGGING
1596         LDAP_LOG( BACKEND, ENTRY,
1597                 "slap_sasl_setpass: \"%s\"\n",
1598                 id.bv_val ? id.bv_val : "", 0, 0);
1599 #else
1600         Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1601                 id.bv_val ? id.bv_val : "", 0, 0 );
1602 #endif
1603
1604         rc = slap_passwd_parse( reqdata,
1605                 NULL, &old, &new, text );
1606
1607         if( rc != LDAP_SUCCESS ) {
1608                 goto done;
1609         }
1610
1611         if( new.bv_len == 0 ) {
1612                 slap_passwd_generate(&new);
1613
1614                 if( new.bv_len == 0 ) {
1615                         *text = "password generation failed.";
1616                         rc = LDAP_OTHER;
1617                         goto done;
1618                 }
1619
1620                 *rspdata = slap_passwd_return( &new );
1621         }
1622
1623 #if SASL_VERSION_MAJOR < 2
1624         rc = sasl_setpass( conn->c_sasl_context,
1625                 id.bv_val, new.bv_val, new.bv_len, 0, text );
1626 #else
1627         rc = sasl_setpass( conn->c_sasl_context, id.bv_val,
1628                 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1629         if( rc != SASL_OK ) {
1630                 *text = sasl_errdetail( conn->c_sasl_context );
1631         }
1632 #endif
1633         switch(rc) {
1634                 case SASL_OK:
1635                         rc = LDAP_SUCCESS;
1636                         break;
1637
1638                 case SASL_NOCHANGE:
1639                 case SASL_NOMECH:
1640                 case SASL_DISABLED:
1641                 case SASL_PWLOCK:
1642                 case SASL_FAIL:
1643                 case SASL_BADPARAM:
1644                 default:
1645                         rc = LDAP_OTHER;
1646         }
1647
1648 done:
1649         return rc;
1650 }
1651 #endif