git.sur5r.net Git - openldap/blob - servers/slapd/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 = SLAP_MALLOC( len+1 );
 402                 if( dn->bv_val == NULL ) {
 403 #ifdef NEW_LOGGING
 404                         LDAP_LOG( TRANSPORT, ERR,
 405                                 "slap_sasl_getdn: SLAP_MALLOC failed", 0, 0, 0 );
 406 #else
 407                         Debug( LDAP_DEBUG_ANY,
 408                                 "slap_sasl_getdn: SLAP_MALLOC failed", 0, 0, 0 );
 409 #endif
 410                         return LDAP_OTHER;
 411                 }
 412                 p = lutil_strcopy( dn->bv_val, "uid=" );
 413                 p = lutil_strncopy( p, c1, dn->bv_len );
 414
 415                 if( realm ) {
 416                         int rlen = dn->bv_len - ( realm - c1 );
 417                         p = lutil_strcopy( p, ",cn=" );
 418                         p = lutil_strncopy( p, realm, rlen );
 419                         realm[-1] = '@';
 420                 } else if( user_realm && *user_realm ) {
 421                         p = lutil_strcopy( p, ",cn=" );
 422                         p = lutil_strcopy( p, user_realm );
 423                 }
 424
 425                 if( conn->c_sasl_bind_mech.bv_len ) {
 426                         p = lutil_strcopy( p, ",cn=" );
 427                         p = lutil_strcopy( p, conn->c_sasl_bind_mech.bv_val );
 428                 }
 429                 p = lutil_strcopy( p, ",cn=auth" );
 430                 dn->bv_len = p - dn->bv_val;
 431
 432 #ifdef NEW_LOGGING
 433                 LDAP_LOG( TRANSPORT, ENTRY,
 434                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val, 0, 0 );
 435 #else
 436                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
 437 #endif
 438         }
 439
 440         /* All strings are in DN form now. Normalize if needed. */
 441         if ( do_norm ) {
 442                 rc = dnNormalize2( NULL, dn, &dn2 );
 443
 444                 /* User DNs were constructed above and must be freed now */
 445                 if ( is_dn == SET_U )
 446                         ch_free( dn->bv_val );
 447
 448                 if ( rc != LDAP_SUCCESS ) {
 449                         dn->bv_val = NULL;
 450                         dn->bv_len = 0;
 451                         return rc;
 452                 }
 453                 *dn = dn2;
 454         }
 455
 456         /* Run thru regexp */
 457         slap_sasl2dn( conn, dn, &dn2 );
 458         if( dn2.bv_val ) {
 459                 ch_free( dn->bv_val );
 460                 *dn = dn2;
 461 #ifdef NEW_LOGGING
 462                 LDAP_LOG( TRANSPORT, ENTRY,
 463                         "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val, 0, 0 );
 464 #else
 465                 Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
 466                         dn->bv_val, 0, 0 );
 467 #endif
 468         }
 469
 470         return( LDAP_SUCCESS );
 471 }
 472
 473 #if SASL_VERSION_MAJOR >= 2
 474 static const char *slap_propnames[] = {
 475         "*slapConn", "*authcDN", "*authzDN", NULL };
 476
 477 static Filter *generic_filter;
 478
 479 #define PROP_CONN       0
 480 #define PROP_AUTHC      1
 481 #define PROP_AUTHZ      2
 482
 483 typedef struct lookup_info {
 484         int last;
 485         int flags;
 486         const struct propval *list;
 487         sasl_server_params_t *sparams;
 488 } lookup_info;
 489
 490 static int
 491 sasl_ap_lookup(
 492         BackendDB *be,
 493         Connection *conn,
 494         Operation *op,
 495         Entry *e,
 496         AttributeName *an,
 497         int attrsonly,
 498         LDAPControl **ctrls )
 499 {
 500         BerVarray bv;
 501         AttributeDescription *ad;
 502         Attribute *a;
 503         const char *text;
 504         int rc, i;
 505         slap_callback *tmp = op->o_callback;
 506         lookup_info *sl = tmp->sc_private;
 507
 508         for( i = 0; i < sl->last; i++ ) {
 509                 const char *name = sl->list[i].name;
 510
 511                 if ( name[0] == '*' ) {
 512                         if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
 513                         name++;
 514                 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
 515                         continue;
 516
 517                 if ( sl->list[i].values ) {
 518                         if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
 519                 }
 520                 ad = NULL;
 521                 rc = slap_str2ad( name, &ad, &text );
 522                 if ( rc != LDAP_SUCCESS ) {
 523 #ifdef NEW_LOGGING
 524                         LDAP_LOG( TRANSPORT, DETAIL1,
 525                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 526 #else
 527                         Debug( LDAP_DEBUG_TRACE,
 528                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 529 #endif
 530                         continue;
 531                 }
 532                 a = attr_find( e->e_attrs, ad );
 533                 if ( !a ) continue;
 534                 if ( ! access_allowed( be, conn, op, e, ad, NULL, ACL_AUTH, NULL ) )
 535                         continue;
 536                 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) )
 537                         sl->sparams->utils->prop_erase( sl->sparams->propctx, sl->list[i].name );
 538                 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
 539                         sl->sparams->utils->prop_set( sl->sparams->propctx, sl->list[i].name,
 540                                 bv->bv_val, bv->bv_len );
 541                 }
 542         }
 543         return LDAP_SUCCESS;
 544 }
 545
 546 static void
 547 slap_auxprop_lookup(
 548         void *glob_context,
 549         sasl_server_params_t *sparams,
 550         unsigned flags,
 551         const char *user,
 552         unsigned ulen)
 553 {
 554         int rc, i, doit=0;
 555         struct berval dn;
 556         Connection *conn = NULL;
 557         lookup_info sl;
 558
 559         sl.list = sparams->utils->prop_get( sparams->propctx );
 560         sl.sparams = sparams;
 561         sl.flags = flags;
 562
 563         /* Find our DN and conn first */
 564         for( i = 0, sl.last = 0; sl.list[i].name; i++ ) {
 565                 if ( sl.list[i].name[0] == '*' ) {
 566                         if ( !strcmp( sl.list[i].name, slap_propnames[PROP_CONN] ) ) {
 567                                 if ( sl.list[i].values && sl.list[i].values[0] )
 568                                         AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
 569                                 if ( !sl.last ) sl.last = i;
 570                         }
 571                         if ( (flags & SASL_AUXPROP_AUTHZID) &&
 572                                 !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHZ] ) ) {
 573
 574                                 if ( sl.list[i].values && sl.list[i].values[0] )
 575                                         AC_MEMCPY( &dn, sl.list[i].values[0], sizeof( dn ) );
 576                                 if ( !sl.last ) sl.last = i;
 577                                 break;
 578                         }
 579                         if ( !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHC] ) ) {
 580                                 if ( !sl.last ) sl.last = i;
 581                                 if ( sl.list[i].values && sl.list[i].values[0] ) {
 582                                         AC_MEMCPY( &dn, sl.list[i].values[0], sizeof( dn ) );
 583                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 584                                                 break;
 585                                 }
 586                         }
 587                 }
 588         }
 589
 590         /* Now see what else needs to be fetched */
 591         for( i = 0; i < sl.last; i++ ) {
 592                 const char *name = sl.list[i].name;
 593
 594                 if ( name[0] == '*' ) {
 595                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 596                         name++;
 597                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 598                         continue;
 599
 600                 if ( sl.list[i].values ) {
 601                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 602                 }
 603                 doit = 1;
 604         }
 605
 606         if (doit) {
 607                 Backend *be;
 608                 Operation op = {0};
 609                 slap_callback cb = { slap_cb_null_response,
 610                         slap_cb_null_sresult, sasl_ap_lookup, NULL };
 611
 612                 cb.sc_private = &sl;
 613
 614                 be = select_backend( &dn, 0, 1 );
 615
 616                 if ( be && be->be_search ) {
 617                         op.o_tag = LDAP_REQ_SEARCH;
 618                         op.o_protocol = LDAP_VERSION3;
 619                         op.o_ndn = conn->c_ndn;
 620                         op.o_callback = &cb;
 621                         op.o_time = slap_get_time();
 622                         op.o_do_not_cache = 1;
 623                         op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
 624
 625                         (*be->be_search)( be, conn, &op, NULL, &dn,
 626                                 LDAP_SCOPE_BASE, LDAP_DEREF_NEVER, 1, 0,
 627                                 generic_filter, NULL, NULL, 0 );
 628                 }
 629         }
 630 }
 631
 632 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 633         0,      /* Features */
 634         0,      /* spare */
 635         NULL,   /* glob_context */
 636         NULL,   /* auxprop_free */
 637         slap_auxprop_lookup,
 638         "slapd",        /* name */
 639         NULL    /* spare */
 640 };
 641
 642 static int
 643 slap_auxprop_init(
 644         const sasl_utils_t *utils,
 645         int max_version,
 646         int *out_version,
 647         sasl_auxprop_plug_t **plug,
 648         const char *plugname)
 649 {
 650         if ( !out_version | !plug ) return SASL_BADPARAM;
 651
 652         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 653
 654         *out_version = SASL_AUXPROP_PLUG_VERSION;
 655         *plug = &slap_auxprop_plugin;
 656         return SASL_OK;
 657 }
 658
 659 typedef struct checkpass_info {
 660         int rc;
 661         struct berval cred;
 662 } checkpass_info;
 663
 664 static int
 665 sasl_cb_checkpass(
 666         BackendDB *be,
 667         Connection *conn,
 668         Operation *op,
 669         Entry *e,
 670         AttributeName *an,
 671         int attrsonly,
 672         LDAPControl **ctrls )
 673 {
 674         slap_callback *tmp = op->o_callback;
 675         checkpass_info *ci = tmp->sc_private;
 676         Attribute *a;
 677         struct berval *bv;
 678
 679         ci->rc = SASL_NOVERIFY;
 680
 681         a = attr_find( e->e_attrs, slap_schema.si_ad_userPassword );
 682         if ( !a ) return 0;
 683         if ( ! access_allowed( be, conn, op, e, slap_schema.si_ad_userPassword,
 684                 NULL, ACL_AUTH, NULL ) ) return 0;
 685
 686         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 687                 if ( !lutil_passwd( bv, &ci->cred, NULL ) ) {
 688                         ci->rc = SASL_OK;
 689                         break;
 690                 }
 691         }
 692         return 0;
 693 }
 694
 695 static int
 696 slap_sasl_checkpass(
 697         sasl_conn_t *sconn,
 698         void *context,
 699         const char *username,
 700         const char *pass,
 701         unsigned passlen,
 702         struct propctx *propctx)
 703 {
 704         Connection *conn = (Connection *)context;
 705         struct berval dn;
 706         int rc;
 707         Backend *be;
 708         checkpass_info ci;
 709
 710         ci.rc = SASL_NOUSER;
 711
 712         /* SASL will fallback to its own mechanisms if we don't
 713          * find an answer here.
 714          */
 715
 716         rc = slap_sasl_getdn( conn, (char *)username, 0, NULL, &dn,
 717                 FLAG_GETDN_AUTHCID );
 718         if ( rc != LDAP_SUCCESS ) {
 719                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 720                 return SASL_NOUSER;
 721         }
 722
 723         if ( dn.bv_len == 0 ) {
 724                 sasl_seterror( sconn, 0,
 725                         "No password is associated with the Root DSE" );
 726                 if ( dn.bv_val != NULL ) {
 727                         ch_free( dn.bv_val );
 728                 }
 729                 return SASL_NOUSER;
 730         }
 731
 732         be = select_backend( &dn, 0, 1 );
 733         if ( be && be->be_search ) {
 734                 Operation op = {0};
 735                 slap_callback cb = { slap_cb_null_response,
 736                         slap_cb_null_sresult, sasl_cb_checkpass, NULL };
 737
 738                 ci.cred.bv_val = (char *)pass;
 739                 ci.cred.bv_len = passlen;
 740
 741                 cb.sc_private = &ci;
 742                 op.o_tag = LDAP_REQ_SEARCH;
 743                 op.o_protocol = LDAP_VERSION3;
 744                 op.o_ndn = conn->c_ndn;
 745                 op.o_callback = &cb;
 746                 op.o_time = slap_get_time();
 747                 op.o_do_not_cache = 1;
 748                 op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
 749
 750                 (*be->be_search)( be, conn, &op, NULL, &dn,
 751                         LDAP_SCOPE_BASE, LDAP_DEREF_NEVER, 1, 0,
 752                         generic_filter, NULL, NULL, 0 );
 753         }
 754         if ( ci.rc != SASL_OK ) {
 755                 sasl_seterror( sconn, 0,
 756                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 757         }
 758
 759         ch_free( dn.bv_val );
 760
 761         return ci.rc;
 762 }
 763
 764 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 765  * auxiliary property, so that we can refer to it in sasl_authorize
 766  * without interfering with anything else. Also, the SASL username
 767  * buffer is constrained to 256 characters, and our DNs could be
 768  * much longer (totally arbitrary length)...
 769  */
 770 static int
 771 slap_sasl_canonicalize(
 772         sasl_conn_t *sconn,
 773         void *context,
 774         const char *in,
 775         unsigned inlen,
 776         unsigned flags,
 777         const char *user_realm,
 778         char *out,
 779         unsigned out_max,
 780         unsigned *out_len)
 781 {
 782         Connection *conn = (Connection *)context;
 783         struct propctx *props = sasl_auxprop_getctx( sconn );
 784         struct propval auxvals[3];
 785         struct berval dn;
 786         int rc, which;
 787         const char *names[2];
 788
 789         *out_len = 0;
 790
 791 #ifdef NEW_LOGGING
 792         LDAP_LOG( TRANSPORT, ENTRY,
 793                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 794                 conn ? conn->c_connid : -1,
 795                 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid", in ? in : "<empty>");
 796 #else
 797         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 798                 "%s=\"%s\"\n",
 799                         conn ? conn->c_connid : -1,
 800                         (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 801                         in ? in : "<empty>" );
 802 #endif
 803
 804         /* If name is too big, just truncate. We don't care, we're
 805          * using DNs, not the usernames.
 806          */
 807         if ( inlen > out_max )
 808                 inlen = out_max-1;
 809
 810         /* See if we need to add request, can only do it once */
 811         prop_getnames( props, slap_propnames, auxvals );
 812         if ( !auxvals[0].name )
 813                 prop_request( props, slap_propnames );
 814
 815         if ( flags & SASL_CU_AUTHID )
 816                 which = PROP_AUTHC;
 817         else
 818                 which = PROP_AUTHZ;
 819
 820         /* Need to store the Connection for auxprop_lookup */
 821         if ( !auxvals[PROP_CONN].values ) {
 822                 names[0] = slap_propnames[PROP_CONN];
 823                 names[1] = NULL;
 824                 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
 825         }
 826
 827         /* Already been here? */
 828         if ( auxvals[which].values )
 829                 goto done;
 830
 831         /* Normally we require an authzID to have a u: or dn: prefix.
 832          * However, SASL frequently gives us an authzID that is just
 833          * an exact copy of the authcID, without a prefix. We need to
 834          * detect and allow this condition. If SASL calls canonicalize
 835          * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
 836          * But if it's broken into two calls, we need to remember the
 837          * authcID so that we can compare the authzID later. We store
 838          * the authcID temporarily in conn->c_sasl_dn. We necessarily
 839          * finish Canonicalizing before Authorizing, so there is no
 840          * conflict with slap_sasl_authorize's use of this temp var.
 841          */
 842         if ( flags == SASL_CU_AUTHID ) {
 843                 conn->c_sasl_dn.bv_val = (char *) in;
 844         } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
 845                 rc = strcmp( in, conn->c_sasl_dn.bv_val );
 846                 conn->c_sasl_dn.bv_val = NULL;
 847                 /* They were equal, no work needed */
 848                 if ( !rc ) goto done;
 849         }
 850
 851         rc = slap_sasl_getdn( conn, (char *)in, inlen, (char *)user_realm, &dn,
 852                 (flags & SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
 853         if ( rc != LDAP_SUCCESS ) {
 854                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 855                 return SASL_NOAUTHZ;
 856         }
 857
 858         names[0] = slap_propnames[which];
 859         names[1] = NULL;
 860
 861         prop_set( props, names[0], (char *)&dn, sizeof( dn ) );
 862
 863 #ifdef NEW_LOGGING
 864         LDAP_LOG( TRANSPORT, ENTRY,
 865                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 866                 conn ? conn->c_connid : -1, names[0]+1, dn.bv_val );
 867 #else
 868         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 869                 "%s=\"%s\"\n",
 870                         conn ? conn->c_connid : -1,
 871                         names[0]+1, dn.bv_val );
 872 #endif
 873 done:   AC_MEMCPY( out, in, inlen );
 874         out[inlen] = '\0';
 875
 876         *out_len = inlen;
 877
 878         return SASL_OK;
 879 }
 880
 881 static int
 882 slap_sasl_authorize(
 883         sasl_conn_t *sconn,
 884         void *context,
 885         char *requested_user,
 886         unsigned rlen,
 887         char *auth_identity,
 888         unsigned alen,
 889         const char *def_realm,
 890         unsigned urlen,
 891         struct propctx *props)
 892 {
 893         Connection *conn = (Connection *)context;
 894         struct propval auxvals[3];
 895         struct berval authcDN, authzDN;
 896         int rc;
 897
 898 #ifdef NEW_LOGGING
 899         LDAP_LOG( TRANSPORT, ENTRY,
 900                 "slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
 901                 conn ? conn->c_connid : -1, auth_identity, requested_user);
 902 #else
 903         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 904                 "authcid=\"%s\" authzid=\"%s\"\n",
 905                 conn ? conn->c_connid : -1, auth_identity, requested_user );
 906 #endif
 907         if ( conn->c_sasl_dn.bv_val ) {
 908                 ch_free( conn->c_sasl_dn.bv_val );
 909                 conn->c_sasl_dn.bv_val = NULL;
 910                 conn->c_sasl_dn.bv_len = 0;
 911         }
 912
 913         /* Skip PROP_CONN */
 914         prop_getnames( props, slap_propnames+1, auxvals );
 915
 916         AC_MEMCPY( &authcDN, auxvals[0].values[0], sizeof(authcDN) );
 917
 918         /* Nothing to do if no authzID was given */
 919         if ( !auxvals[1].name || !auxvals[1].values ) {
 920                 conn->c_sasl_dn = authcDN;
 921                 return SASL_OK;
 922         }
 923
 924         AC_MEMCPY( &authzDN, auxvals[1].values[0], sizeof(authzDN) );
 925
 926         rc = slap_sasl_authorized( conn, &authcDN, &authzDN );
 927         ch_free( authcDN.bv_val );
 928         if ( rc != LDAP_SUCCESS ) {
 929 #ifdef NEW_LOGGING
 930                 LDAP_LOG( TRANSPORT, INFO,
 931                         "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 932                         (long)(conn ? conn->c_connid : -1), rc, 0 );
 933 #else
 934                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 935                         " authorization disallowed (%d)\n",
 936                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 937 #endif
 938
 939                 sasl_seterror( sconn, 0, "not authorized" );
 940                 ch_free( authzDN.bv_val );
 941                 return SASL_NOAUTHZ;
 942         }
 943
 944         conn->c_sasl_dn = authzDN;
 945
 946 #ifdef NEW_LOGGING
 947         LDAP_LOG( TRANSPORT, ENTRY,
 948                 "slap_sasl_authorize: conn %d authorization allowed\n",
 949                 (long)(conn ? conn->c_connid : -1), 0, 0 );
 950 #else
 951         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 952                 " authorization allowed\n",
 953                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 954 #endif
 955         return SASL_OK;
 956 }
 957 #else
 958 static int
 959 slap_sasl_authorize(
 960         void *context,
 961         char *authcid,
 962         char *authzid,
 963         const char **user,
 964         const char **errstr)
 965 {
 966         struct berval authcDN, authzDN;
 967         int rc;
 968         Connection *conn = context;
 969         char *realm;
 970
 971         *user = NULL;
 972         if ( conn->c_sasl_dn.bv_val ) {
 973                 ch_free( conn->c_sasl_dn.bv_val );
 974                 conn->c_sasl_dn.bv_val = NULL;
 975                 conn->c_sasl_dn.bv_len = 0;
 976         }
 977
 978 #ifdef NEW_LOGGING
 979         LDAP_LOG( TRANSPORT, ENTRY,
 980                 "slap_sasl_authorize: conn %d    authcid=\"%s\" authzid=\"%s\"\n",
 981                 conn ? conn->c_connid : -1, authcid ? authcid : "<empty>",
 982                 authzid ? authzid : "<empty>" );
 983 #else
 984         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 985                 "authcid=\"%s\" authzid=\"%s\"\n",
 986                 (long) (conn ? conn->c_connid : -1),
 987                 authcid ? authcid : "<empty>",
 988                 authzid ? authzid : "<empty>" );
 989 #endif
 990
 991         /* Figure out how much data we have for the dn */
 992         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 993         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 994 #ifdef NEW_LOGGING
 995                 LDAP_LOG( TRANSPORT, ERR,
 996                         "slap_sasl_authorize: getprop(REALM) failed.\n", 0, 0, 0 );
 997 #else
 998                 Debug(LDAP_DEBUG_TRACE,
 999                         "authorize: getprop(REALM) failed!\n", 0,0,0);
1000 #endif
1001                 *errstr = "Could not extract realm";
1002                 return SASL_NOAUTHZ;
1003         }
1004
1005         /* Convert the identities to DN's. If no authzid was given, client will
1006            be bound as the DN matching their username */
1007         rc = slap_sasl_getdn( conn, (char *)authcid, 0, realm, &authcDN, FLAG_GETDN_AUTHCID );
1008         if( rc != LDAP_SUCCESS ) {
1009                 *errstr = ldap_err2string( rc );
1010                 return SASL_NOAUTHZ;
1011         }
1012         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
1013 #ifdef NEW_LOGGING
1014                 LDAP_LOG( TRANSPORT, ENTRY,
1015                         "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
1016                         conn ? conn->c_connid : -1, authcDN.bv_val, 0 );
1017 #else
1018                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
1019                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
1020 #endif
1021
1022                 conn->c_sasl_dn = authcDN;
1023                 *errstr = NULL;
1024                 return SASL_OK;
1025         }
1026         rc = slap_sasl_getdn( conn, (char *)authzid, 0, realm, &authzDN, FLAG_GETDN_AUTHZID );
1027         if( rc != LDAP_SUCCESS ) {
1028                 ch_free( authcDN.bv_val );
1029                 *errstr = ldap_err2string( rc );
1030                 return SASL_NOAUTHZ;
1031         }
1032
1033         rc = slap_sasl_authorized(conn, &authcDN, &authzDN );
1034         ch_free( authcDN.bv_val );
1035         if( rc ) {
1036 #ifdef NEW_LOGGING
1037                 LDAP_LOG( TRANSPORT, INFO,
1038                         "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
1039                         (long)(conn ? conn->c_connid : -1), rc, 0 );
1040 #else
1041                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
1042                         " authorization disallowed (%d)\n",
1043                         (long) (conn ? conn->c_connid : -1), rc, 0 );
1044 #endif
1045
1046                 *errstr = "not authorized";
1047                 ch_free( authzDN.bv_val );
1048                 return SASL_NOAUTHZ;
1049         }
1050
1051 #ifdef NEW_LOGGING
1052         LDAP_LOG( TRANSPORT, RESULTS,
1053                 "slap_sasl_authorize: conn %d authorization allowed\n",
1054            (long)(conn ? conn->c_connid : -1 ), 0, 0 );
1055 #else
1056         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
1057                 " authorization allowed\n",
1058                 (long) (conn ? conn->c_connid : -1), 0, 0 );
1059 #endif
1060
1061         conn->c_sasl_dn = authzDN;
1062         *errstr = NULL;
1063         return SASL_OK;
1064 }
1065 #endif /* SASL_VERSION_MAJOR >= 2 */
1066
1067 static int
1068 slap_sasl_err2ldap( int saslerr )
1069 {
1070         int rc;
1071
1072         switch (saslerr) {
1073                 case SASL_CONTINUE:
1074                         rc = LDAP_SASL_BIND_IN_PROGRESS;
1075                         break;
1076                 case SASL_FAIL:
1077                         rc = LDAP_OTHER;
1078                         break;
1079                 case SASL_NOMEM:
1080                         rc = LDAP_OTHER;
1081                         break;
1082                 case SASL_NOMECH:
1083                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1084                         break;
1085                 case SASL_BADAUTH:
1086                         rc = LDAP_INVALID_CREDENTIALS;
1087                         break;
1088                 case SASL_NOAUTHZ:
1089                         rc = LDAP_INSUFFICIENT_ACCESS;
1090                         break;
1091                 case SASL_TOOWEAK:
1092                 case SASL_ENCRYPT:
1093                         rc = LDAP_INAPPROPRIATE_AUTH;
1094                         break;
1095                 default:
1096                         rc = LDAP_OTHER;
1097                         break;
1098         }
1099
1100         return rc;
1101 }
1102 #endif
1103
1104
1105 int slap_sasl_init( void )
1106 {
1107 #ifdef HAVE_CYRUS_SASL
1108         int rc;
1109         static sasl_callback_t server_callbacks[] = {
1110                 { SASL_CB_LOG, &slap_sasl_log, NULL },
1111                 { SASL_CB_LIST_END, NULL, NULL }
1112         };
1113
1114 #ifdef HAVE_SASL_VERSION
1115 #define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
1116         (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
1117
1118         sasl_version( NULL, &rc );
1119         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
1120                 (rc & 0xffff) < SASL_VERSION_STEP) {
1121
1122 #ifdef NEW_LOGGING
1123                 LDAP_LOG( TRANSPORT, INFO,
1124                 "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
1125                         rc, SASL_BUILD_VERSION, 0 );
1126 #else
1127                 Debug( LDAP_DEBUG_ANY,
1128                 "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
1129                         rc, SASL_BUILD_VERSION, 0 );
1130 #endif
1131                 return -1;
1132         }
1133 #endif
1134
1135         /* SASL 2 does its own memory management internally */
1136 #if SASL_VERSION_MAJOR < 2
1137         sasl_set_alloc(
1138                 ber_memalloc,
1139                 ber_memcalloc,
1140                 ber_memrealloc,
1141                 ber_memfree );
1142 #endif
1143
1144         sasl_set_mutex(
1145                 ldap_pvt_sasl_mutex_new,
1146                 ldap_pvt_sasl_mutex_lock,
1147                 ldap_pvt_sasl_mutex_unlock,
1148                 ldap_pvt_sasl_mutex_dispose );
1149
1150 #if SASL_VERSION_MAJOR >= 2
1151         sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
1152 #endif
1153         /* should provide callbacks for logging */
1154         /* server name should be configurable */
1155         rc = sasl_server_init( server_callbacks, "slapd" );
1156
1157         if( rc != SASL_OK ) {
1158 #ifdef NEW_LOGGING
1159                 LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: init failed.\n", 0, 0, 0 );
1160 #else
1161                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
1162                         0, 0, 0 );
1163 #endif
1164 #if SASL_VERSION_MAJOR < 2
1165                 /* A no-op used to make sure we linked with Cyrus 1.5 */
1166                 sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
1167 #endif
1168
1169                 return -1;
1170         }
1171
1172 #ifdef NEW_LOGGING
1173         LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: initialized!\n", 0, 0, 0 );
1174 #else
1175         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1176                 0, 0, 0 );
1177 #endif
1178
1179
1180         /* default security properties */
1181         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1182         sasl_secprops.max_ssf = INT_MAX;
1183         sasl_secprops.maxbufsize = 65536;
1184         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1185 #endif
1186
1187         return 0;
1188 }
1189
1190 int slap_sasl_destroy( void )
1191 {
1192 #ifdef HAVE_CYRUS_SASL
1193         sasl_done();
1194 #endif
1195 #if SASL_VERSION_MAJOR >= 2
1196         filter_free( generic_filter );
1197 #endif
1198         free( global_host );
1199         global_host = NULL;
1200
1201         return 0;
1202 }
1203
1204 int slap_sasl_open( Connection *conn )
1205 {
1206         int cb, sc = LDAP_SUCCESS;
1207 #if SASL_VERSION_MAJOR >= 2
1208         char *ipremoteport = NULL, *iplocalport = NULL;
1209 #endif
1210
1211 #ifdef HAVE_CYRUS_SASL
1212         sasl_conn_t *ctx = NULL;
1213         sasl_callback_t *session_callbacks;
1214
1215         assert( conn->c_sasl_context == NULL );
1216         assert( conn->c_sasl_extra == NULL );
1217
1218         conn->c_sasl_layers = 0;
1219
1220         session_callbacks =
1221 #if SASL_VERSION_MAJOR >= 2
1222                 SLAP_CALLOC( 5, sizeof(sasl_callback_t));
1223 #else
1224                 SLAP_CALLOC( 3, sizeof(sasl_callback_t));
1225 #endif
1226         if( session_callbacks == NULL ) {
1227 #ifdef NEW_LOGGING
1228                         LDAP_LOG( TRANSPORT, ERR,
1229                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1230 #else
1231                         Debug( LDAP_DEBUG_ANY,
1232                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1233 #endif
1234                         return -1;
1235         }
1236         conn->c_sasl_extra = session_callbacks;
1237
1238         session_callbacks[cb=0].id = SASL_CB_LOG;
1239         session_callbacks[cb].proc = &slap_sasl_log;
1240         session_callbacks[cb++].context = conn;
1241
1242         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1243         session_callbacks[cb].proc = &slap_sasl_authorize;
1244         session_callbacks[cb++].context = conn;
1245
1246 #if SASL_VERSION_MAJOR >= 2
1247         session_callbacks[cb].id = SASL_CB_CANON_USER;
1248         session_callbacks[cb].proc = &slap_sasl_canonicalize;
1249         session_callbacks[cb++].context = conn;
1250
1251         /* XXXX: this should be conditional */
1252         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
1253         session_callbacks[cb].proc = &slap_sasl_checkpass;
1254         session_callbacks[cb++].context = conn;
1255 #endif
1256
1257         session_callbacks[cb].id = SASL_CB_LIST_END;
1258         session_callbacks[cb].proc = NULL;
1259         session_callbacks[cb++].context = NULL;
1260
1261         if( global_host == NULL ) {
1262                 global_host = ldap_pvt_get_fqdn( NULL );
1263         }
1264
1265         /* create new SASL context */
1266 #if SASL_VERSION_MAJOR >= 2
1267         if ( generic_filter == NULL ) {
1268                 generic_filter = str2filter( "(objectclass=*)" );
1269         }
1270         if ( conn->c_sock_name.bv_len != 0 &&
1271              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
1272                 char *p;
1273
1274                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
1275                 /* Convert IPv6 addresses to address;port syntax. */
1276                 p = strrchr( iplocalport, ' ' );
1277                 /* Convert IPv4 addresses to address;port syntax. */
1278                 if ( p == NULL ) p = strchr( iplocalport, ':' );
1279                 if ( p != NULL ) {
1280                         *p = ';';
1281                 }
1282         }
1283         if ( conn->c_peer_name.bv_len != 0 &&
1284              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
1285                 char *p;
1286
1287                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
1288                 /* Convert IPv6 addresses to address;port syntax. */
1289                 p = strrchr( ipremoteport, ' ' );
1290                 /* Convert IPv4 addresses to address;port syntax. */
1291                 if ( p == NULL ) p = strchr( ipremoteport, ':' );
1292                 if ( p != NULL ) {
1293                         *p = ';';
1294                 }
1295         }
1296         sc = sasl_server_new( "ldap", global_host, global_realm,
1297                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
1298         if ( iplocalport != NULL ) {
1299                 ch_free( iplocalport );
1300         }
1301         if ( ipremoteport != NULL ) {
1302                 ch_free( ipremoteport );
1303         }
1304 #else
1305         sc = sasl_server_new( "ldap", global_host, global_realm,
1306                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
1307 #endif
1308
1309         if( sc != SASL_OK ) {
1310 #ifdef NEW_LOGGING
1311                 LDAP_LOG( TRANSPORT, ERR,
1312                         "slap_sasl_open: sasl_server_new failed: %d\n", sc, 0, 0 );
1313 #else
1314                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1315                         sc, 0, 0 );
1316 #endif
1317
1318                 return -1;
1319         }
1320
1321         conn->c_sasl_context = ctx;
1322
1323         if( sc == SASL_OK ) {
1324                 sc = sasl_setprop( ctx,
1325                         SASL_SEC_PROPS, &sasl_secprops );
1326
1327                 if( sc != SASL_OK ) {
1328 #ifdef NEW_LOGGING
1329                         LDAP_LOG( TRANSPORT, ERR,
1330                                 "slap_sasl_open: sasl_setprop failed: %d \n", sc, 0, 0 );
1331 #else
1332                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1333                                 sc, 0, 0 );
1334 #endif
1335
1336                         slap_sasl_close( conn );
1337                         return -1;
1338                 }
1339         }
1340
1341         sc = slap_sasl_err2ldap( sc );
1342 #endif
1343         return sc;
1344 }
1345
1346 int slap_sasl_external(
1347         Connection *conn,
1348         slap_ssf_t ssf,
1349         const char *auth_id )
1350 {
1351 #if SASL_VERSION_MAJOR >= 2
1352         int sc;
1353         sasl_conn_t *ctx = conn->c_sasl_context;
1354
1355         if ( ctx == NULL ) {
1356                 return LDAP_UNAVAILABLE;
1357         }
1358
1359         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1360
1361         if ( sc != SASL_OK ) {
1362                 return LDAP_OTHER;
1363         }
1364
1365         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
1366
1367         if ( sc != SASL_OK ) {
1368                 return LDAP_OTHER;
1369         }
1370
1371 #elif defined(HAVE_CYRUS_SASL)
1372         int sc;
1373         sasl_conn_t *ctx = conn->c_sasl_context;
1374         sasl_external_properties_t extprops;
1375
1376         if ( ctx == NULL ) {
1377                 return LDAP_UNAVAILABLE;
1378         }
1379
1380         memset( &extprops, '\0', sizeof(extprops) );
1381         extprops.ssf = ssf;
1382         extprops.auth_id = (char *) auth_id;
1383
1384         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1385                 (void *) &extprops );
1386
1387         if ( sc != SASL_OK ) {
1388                 return LDAP_OTHER;
1389         }
1390 #endif
1391
1392         return LDAP_SUCCESS;
1393 }
1394
1395 int slap_sasl_reset( Connection *conn )
1396 {
1397 #ifdef HAVE_CYRUS_SASL
1398         sasl_conn_t *ctx = conn->c_sasl_context;
1399
1400         if( ctx != NULL ) {
1401         }
1402 #endif
1403         /* must return "anonymous" */
1404         return LDAP_SUCCESS;
1405 }
1406
1407 char ** slap_sasl_mechs( Connection *conn )
1408 {
1409         char **mechs = NULL;
1410
1411 #ifdef HAVE_CYRUS_SASL
1412         sasl_conn_t *ctx = conn->c_sasl_context;
1413
1414         if( ctx != NULL ) {
1415                 int sc;
1416                 SASL_CONST char *mechstr;
1417
1418                 sc = sasl_listmech( ctx,
1419                         NULL, NULL, ",", NULL,
1420                         &mechstr, NULL, NULL );
1421
1422                 if( sc != SASL_OK ) {
1423 #ifdef NEW_LOGGING
1424                         LDAP_LOG( TRANSPORT, ERR,
1425                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc, 0, 0 );
1426 #else
1427                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1428                                 sc, 0, 0 );
1429 #endif
1430
1431                         return NULL;
1432                 }
1433
1434                 mechs = ldap_str2charray( mechstr, "," );
1435
1436 #if SASL_VERSION_MAJOR < 2
1437                 ch_free( mechstr );
1438 #endif
1439         }
1440 #endif
1441
1442         return mechs;
1443 }
1444
1445 int slap_sasl_close( Connection *conn )
1446 {
1447 #ifdef HAVE_CYRUS_SASL
1448         sasl_conn_t *ctx = conn->c_sasl_context;
1449
1450         if( ctx != NULL ) {
1451                 sasl_dispose( &ctx );
1452         }
1453
1454         conn->c_sasl_context = NULL;
1455
1456         free( conn->c_sasl_extra );
1457         conn->c_sasl_extra = NULL;
1458 #endif
1459
1460         return LDAP_SUCCESS;
1461 }
1462
1463 int slap_sasl_bind(
1464     Connection          *conn,
1465     Operation           *op,
1466     struct berval       *dn,
1467     struct berval       *ndn,
1468     struct berval       *cred,
1469         struct berval                   *edn,
1470         slap_ssf_t              *ssfp )
1471 {
1472         int rc = 1;
1473
1474 #ifdef HAVE_CYRUS_SASL
1475         sasl_conn_t *ctx = conn->c_sasl_context;
1476         struct berval response;
1477         unsigned reslen = 0;
1478         const char *errstr = NULL;
1479         int sc;
1480
1481 #ifdef NEW_LOGGING
1482         LDAP_LOG( TRANSPORT, ENTRY,
1483                 "sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1484                 dn->bv_len ? dn->bv_val : "",
1485                 conn->c_sasl_bind_in_progress ? "<continuing>" :
1486                 conn->c_sasl_bind_mech.bv_val,
1487                 cred ? cred->bv_len : 0 );
1488 #else
1489         Debug(LDAP_DEBUG_ARGS,
1490                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1491                 dn->bv_len ? dn->bv_val : "",
1492                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
1493                 cred ? cred->bv_len : 0 );
1494 #endif
1495
1496
1497         if( ctx == NULL ) {
1498                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
1499                         NULL, "SASL unavailable on this session", NULL, NULL );
1500                 return rc;
1501         }
1502
1503 #if SASL_VERSION_MAJOR >= 2
1504 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1505         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1506 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1507         sasl_server_step( ctx, cred, clen, resp, rlen )
1508 #else
1509 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1510         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
1511 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1512         sasl_server_step( ctx, cred, clen, resp, rlen, err )
1513 #endif
1514
1515         if ( !conn->c_sasl_bind_in_progress ) {
1516                 sc = START( ctx,
1517                         conn->c_sasl_bind_mech.bv_val,
1518                         cred->bv_len ? cred->bv_val : "",
1519                         cred->bv_len,
1520                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1521
1522         } else {
1523                 sc = STEP( ctx,
1524                         cred->bv_val, cred->bv_len,
1525                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1526         }
1527
1528         response.bv_len = reslen;
1529
1530         if ( sc == SASL_OK ) {
1531                 sasl_ssf_t *ssf = NULL;
1532
1533                 *edn = conn->c_sasl_dn;
1534                 conn->c_sasl_dn.bv_val = NULL;
1535                 conn->c_sasl_dn.bv_len = 0;
1536
1537                 rc = LDAP_SUCCESS;
1538
1539                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1540                 *ssfp = ssf ? *ssf : 0;
1541
1542                 if( *ssfp ) {
1543                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1544                         conn->c_sasl_layers++;
1545                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1546                 }
1547
1548                 send_ldap_sasl( conn, op, rc,
1549                         NULL, NULL, NULL, NULL,
1550                         response.bv_len ? &response : NULL );
1551
1552         } else if ( sc == SASL_CONTINUE ) {
1553                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1554                         NULL, NULL, NULL, NULL, &response );
1555
1556         } else {
1557 #if SASL_VERSION_MAJOR >= 2
1558                 errstr = sasl_errdetail( ctx );
1559 #endif
1560                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1561                         NULL, errstr, NULL, NULL );
1562         }
1563
1564 #if SASL_VERSION_MAJOR < 2
1565         if( response.bv_len ) {
1566                 ch_free( response.bv_val );
1567         }
1568 #endif
1569
1570 #ifdef NEW_LOGGING
1571         LDAP_LOG( TRANSPORT, RESULTS, "slap_sasl_bind: rc=%d\n", rc, 0, 0 );
1572 #else
1573         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1574 #endif
1575
1576
1577 #else
1578         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1579                 NULL, "SASL not supported", NULL, NULL );
1580 #endif
1581
1582         return rc;
1583 }
1584
1585 char* slap_sasl_secprops( const char *in )
1586 {
1587 #ifdef HAVE_CYRUS_SASL
1588         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1589
1590         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1591 #else
1592         return "SASL not supported";
1593 #endif
1594 }
1595
1596 #ifdef HAVE_CYRUS_SASL
1597 int
1598 slap_sasl_setpass(
1599         Connection      *conn,
1600         Operation       *op,
1601         const char      *reqoid,
1602         struct berval   *reqdata,
1603         char            **rspoid,
1604         struct berval   **rspdata,
1605         LDAPControl     *** rspctrls,
1606         const char      **text )
1607 {
1608         int rc;
1609         struct berval id = { 0, NULL }; /* needs to come from connection */
1610         struct berval new = { 0, NULL };
1611         struct berval old = { 0, NULL };
1612
1613         assert( reqoid != NULL );
1614         assert( strcmp( LDAP_EXOP_MODIFY_PASSWD, reqoid ) == 0 );
1615
1616         rc = sasl_getprop( conn->c_sasl_context, SASL_USERNAME,
1617                 (SASL_CONST void **)&id.bv_val );
1618
1619         if( rc != SASL_OK ) {
1620                 *text = "unable to retrieve SASL username";
1621                 rc = LDAP_OTHER;
1622                 goto done;
1623         }
1624
1625 #ifdef NEW_LOGGING
1626         LDAP_LOG( BACKEND, ENTRY,
1627                 "slap_sasl_setpass: \"%s\"\n",
1628                 id.bv_val ? id.bv_val : "", 0, 0);
1629 #else
1630         Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1631                 id.bv_val ? id.bv_val : "", 0, 0 );
1632 #endif
1633
1634         rc = slap_passwd_parse( reqdata,
1635                 NULL, &old, &new, text );
1636
1637         if( rc != LDAP_SUCCESS ) {
1638                 goto done;
1639         }
1640
1641         if( new.bv_len == 0 ) {
1642                 slap_passwd_generate(&new);
1643
1644                 if( new.bv_len == 0 ) {
1645                         *text = "password generation failed.";
1646                         rc = LDAP_OTHER;
1647                         goto done;
1648                 }
1649
1650                 *rspdata = slap_passwd_return( &new );
1651         }
1652
1653 #if SASL_VERSION_MAJOR < 2
1654         rc = sasl_setpass( conn->c_sasl_context,
1655                 id.bv_val, new.bv_val, new.bv_len, 0, text );
1656 #else
1657         rc = sasl_setpass( conn->c_sasl_context, id.bv_val,
1658                 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1659         if( rc != SASL_OK ) {
1660                 *text = sasl_errdetail( conn->c_sasl_context );
1661         }
1662 #endif
1663         switch(rc) {
1664                 case SASL_OK:
1665                         rc = LDAP_SUCCESS;
1666                         break;
1667
1668                 case SASL_NOCHANGE:
1669                 case SASL_NOMECH:
1670                 case SASL_DISABLED:
1671                 case SASL_PWLOCK:
1672                 case SASL_FAIL:
1673                 case SASL_BADPARAM:
1674                 default:
1675                         rc = LDAP_OTHER;
1676         }
1677
1678 done:
1679         return rc;
1680 }
1681 #endif