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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 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 #include <limits.h>
  19
  20 #ifdef HAVE_CYRUS_SASL
  21 # ifdef HAVE_SASL_SASL_H
  22 #  include <sasl/sasl.h>
  23 # else
  24 #  include <sasl.h>
  25 # endif
  26
  27 # if SASL_VERSION_MAJOR >= 2
  28 #  include <sasl/saslplug.h>
  29 #  define       SASL_CONST const
  30 # else
  31 #  define       SASL_CONST
  32 # endif
  33
  34 static sasl_security_properties_t sasl_secprops;
  35 #endif /* HAVE_CYRUS_SASL */
  36
  37 #include "ldap_pvt.h"
  38 #include "lber_pvt.h"
  39 #include <lutil.h>
  40
  41 int slap_sasl_config( int cargc, char **cargv, char *line,
  42         const char *fname, int lineno )
  43 {
  44                 /* set SASL proxy authorization policy */
  45                 if ( strcasecmp( cargv[0], "sasl-authz-policy" ) == 0 ) {
  46                         if ( cargc != 2 ) {
  47 #ifdef NEW_LOGGING
  48                                 LDAP_LOG( CONFIG, CRIT,
  49                                         "%s: line %d: missing policy in"
  50                                         " \"sasl-authz-policy <policy>\" line\n",
  51                                         fname, lineno, 0 );
  52 #else
  53                                 Debug( LDAP_DEBUG_ANY,
  54                                         "%s: line %d: missing policy in"
  55                                         " \"sasl-authz-policy <policy>\" line\n",
  56                                     fname, lineno, 0 );
  57 #endif
  58
  59                                 return( 1 );
  60                         }
  61                         if ( slap_sasl_setpolicy( cargv[1] ) ) {
  62 #ifdef NEW_LOGGING
  63                                 LDAP_LOG( CONFIG, CRIT,
  64                                            "%s: line %d: unable "
  65                                            "to parse value \"%s\" "
  66                                            "in \"sasl-authz-policy "
  67                                            "<policy>\" line.\n",
  68                                            fname, lineno, cargv[1] );
  69 #else
  70                                 Debug( LDAP_DEBUG_ANY,
  71                                         "%s: line %d: unable "
  72                                         "to parse value \"%s\" "
  73                                         "in \"sasl-authz-policy "
  74                                         "<policy>\" line\n",
  75                                         fname, lineno, cargv[1] );
  76 #endif
  77                                 return( 1 );
  78                         }
  79
  80                 } else if ( !strcasecmp( cargv[0], "sasl-regexp" )
  81                         || !strcasecmp( cargv[0], "saslregexp" ) )
  82                 {
  83                         int rc;
  84                         if ( cargc != 3 ) {
  85 #ifdef NEW_LOGGING
  86                                 LDAP_LOG( CONFIG, CRIT,
  87                                         "%s: line %d: need 2 args in "
  88                                         "\"saslregexp <match> <replace>\"\n",
  89                                         fname, lineno, 0 );
  90 #else
  91                                 Debug( LDAP_DEBUG_ANY,
  92                                         "%s: line %d: need 2 args in "
  93                                         "\"saslregexp <match> <replace>\"\n",
  94                                         fname, lineno, 0 );
  95 #endif
  96
  97                                 return( 1 );
  98                         }
  99                         rc = slap_sasl_regexp_config( cargv[1], cargv[2] );
 100                         if ( rc ) {
 101                                 return rc;
 102                         }
 103
 104 #ifdef HAVE_CYRUS_SASL
 105                 /* set SASL host */
 106                 } else if ( strcasecmp( cargv[0], "sasl-host" ) == 0 ) {
 107                         if ( cargc < 2 ) {
 108 #ifdef NEW_LOGGING
 109                                 LDAP_LOG( CONFIG, CRIT,
 110                                         "%s: line %d: missing host in \"sasl-host <host>\" line\n",
 111                                         fname, lineno, 0 );
 112 #else
 113                                 Debug( LDAP_DEBUG_ANY,
 114                                 "%s: line %d: missing host in \"sasl-host <host>\" line\n",
 115                                     fname, lineno, 0 );
 116 #endif
 117
 118                                 return( 1 );
 119                         }
 120
 121                         if ( global_host != NULL ) {
 122 #ifdef NEW_LOGGING
 123                                 LDAP_LOG( CONFIG, CRIT,
 124                                         "%s: line %d: already set sasl-host!\n",
 125                                         fname, lineno, 0 );
 126 #else
 127                                 Debug( LDAP_DEBUG_ANY,
 128                                         "%s: line %d: already set sasl-host!\n",
 129                                         fname, lineno, 0 );
 130 #endif
 131
 132                                 return 1;
 133
 134                         } else {
 135                                 global_host = ch_strdup( cargv[1] );
 136                         }
 137
 138                 /* set SASL realm */
 139                 } else if ( strcasecmp( cargv[0], "sasl-realm" ) == 0 ) {
 140                         if ( cargc < 2 ) {
 141 #ifdef NEW_LOGGING
 142                                 LDAP_LOG( CONFIG, CRIT, "%s: line %d: "
 143                                         "missing realm in \"sasl-realm <realm>\" line.\n",
 144                                         fname, lineno, 0 );
 145 #else
 146                                 Debug( LDAP_DEBUG_ANY, "%s: line %d: "
 147                                         "missing realm in \"sasl-realm <realm>\" line.\n",
 148                                     fname, lineno, 0 );
 149 #endif
 150
 151                                 return( 1 );
 152                         }
 153
 154                         if ( global_realm != NULL ) {
 155 #ifdef NEW_LOGGING
 156                                 LDAP_LOG( CONFIG, CRIT,
 157                                         "%s: line %d: already set sasl-realm!\n",
 158                                         fname, lineno, 0 );
 159 #else
 160                                 Debug( LDAP_DEBUG_ANY,
 161                                         "%s: line %d: already set sasl-realm!\n",
 162                                         fname, lineno, 0 );
 163 #endif
 164
 165                                 return 1;
 166
 167                         } else {
 168                                 global_realm = ch_strdup( cargv[1] );
 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, "%s: line %d: "
 178                                         "missing flags in \"sasl-secprops <properties>\" line\n",
 179                                         fname, lineno, 0 );
 180 #else
 181                                 Debug( LDAP_DEBUG_ANY, "%s: line %d: "
 182                                         "missing flags in \"sasl-secprops <properties>\" line\n",
 183                                     fname, lineno, 0 );
 184 #endif
 185
 186                                 return 1;
 187                         }
 188
 189                         txt = slap_sasl_secprops( cargv[1] );
 190                         if ( txt != NULL ) {
 191 #ifdef NEW_LOGGING
 192                                 LDAP_LOG( CONFIG, CRIT,
 193                                         "%s: line %d sasl-secprops: %s\n",
 194                                         fname, lineno, txt );
 195 #else
 196                                 Debug( LDAP_DEBUG_ANY,
 197                                         "%s: line %d: sasl-secprops: %s\n",
 198                                     fname, lineno, txt );
 199 #endif
 200
 201                                 return 1;
 202                         }
 203 #endif /* HAVE_CYRUS_SASL */
 204             }
 205
 206             return LDAP_SUCCESS;
 207 }
 208
 209 #ifdef HAVE_CYRUS_SASL
 210
 211 int
 212 slap_sasl_log(
 213         void *context,
 214         int priority,
 215         const char *message)
 216 {
 217         Connection *conn = context;
 218         int level;
 219         const char * label;
 220
 221         if ( message == NULL ) {
 222                 return SASL_BADPARAM;
 223         }
 224
 225         switch (priority) {
 226 #if SASL_VERSION_MAJOR >= 2
 227         case SASL_LOG_NONE:
 228                 level = LDAP_DEBUG_NONE;
 229                 label = "None";
 230                 break;
 231         case SASL_LOG_ERR:
 232                 level = LDAP_DEBUG_ANY;
 233                 label = "Error";
 234                 break;
 235         case SASL_LOG_FAIL:
 236                 level = LDAP_DEBUG_ANY;
 237                 label = "Failure";
 238                 break;
 239         case SASL_LOG_WARN:
 240                 level = LDAP_DEBUG_TRACE;
 241                 label = "Warning";
 242                 break;
 243         case SASL_LOG_NOTE:
 244                 level = LDAP_DEBUG_TRACE;
 245                 label = "Notice";
 246                 break;
 247         case SASL_LOG_DEBUG:
 248                 level = LDAP_DEBUG_TRACE;
 249                 label = "Debug";
 250                 break;
 251         case SASL_LOG_TRACE:
 252                 level = LDAP_DEBUG_TRACE;
 253                 label = "Trace";
 254                 break;
 255         case SASL_LOG_PASS:
 256                 level = LDAP_DEBUG_TRACE;
 257                 label = "Password Trace";
 258                 break;
 259 #else
 260         case SASL_LOG_ERR:
 261                 level = LDAP_DEBUG_ANY;
 262                 label = "Error";
 263                 break;
 264         case SASL_LOG_WARNING:
 265                 level = LDAP_DEBUG_TRACE;
 266                 label = "Warning";
 267                 break;
 268         case SASL_LOG_INFO:
 269                 level = LDAP_DEBUG_TRACE;
 270                 label = "Info";
 271                 break;
 272 #endif
 273         default:
 274                 return SASL_BADPARAM;
 275         }
 276
 277 #ifdef NEW_LOGGING
 278         LDAP_LOG( TRANSPORT, ENTRY,
 279                 "SASL [conn=%ld] %s: %s\n", conn ? conn->c_connid : -1, label, message);
 280 #else
 281         Debug( level, "SASL [conn=%ld] %s: %s\n",
 282                 conn ? conn->c_connid: -1,
 283                 label, message );
 284 #endif
 285
 286
 287         return SASL_OK;
 288 }
 289
 290
 291 #if SASL_VERSION_MAJOR >= 2
 292 static const char *slap_propnames[] = {
 293         "*slapConn", "*authcDN", "*authzDN", NULL };
 294
 295 static Filter *generic_filter;
 296
 297 #define PROP_CONN       0
 298 #define PROP_AUTHC      1
 299 #define PROP_AUTHZ      2
 300
 301 typedef struct lookup_info {
 302         int last;
 303         int flags;
 304         const struct propval *list;
 305         sasl_server_params_t *sparams;
 306 } lookup_info;
 307
 308 static int
 309 sasl_ap_lookup(
 310         BackendDB *be,
 311         Connection *conn,
 312         Operation *op,
 313         Entry *e,
 314         AttributeName *an,
 315         int attrsonly,
 316         LDAPControl **ctrls )
 317 {
 318         BerVarray bv;
 319         AttributeDescription *ad;
 320         Attribute *a;
 321         const char *text;
 322         int rc, i;
 323         slap_callback *tmp = op->o_callback;
 324         lookup_info *sl = tmp->sc_private;
 325
 326         for( i = 0; i < sl->last; i++ ) {
 327                 const char *name = sl->list[i].name;
 328
 329                 if ( name[0] == '*' ) {
 330                         if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
 331                         name++;
 332                 } else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
 333                         continue;
 334
 335                 if ( sl->list[i].values ) {
 336                         if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
 337                 }
 338                 ad = NULL;
 339                 rc = slap_str2ad( name, &ad, &text );
 340                 if ( rc != LDAP_SUCCESS ) {
 341 #ifdef NEW_LOGGING
 342                         LDAP_LOG( TRANSPORT, DETAIL1,
 343                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 344 #else
 345                         Debug( LDAP_DEBUG_TRACE,
 346                                 "slap_auxprop: str2ad(%s): %s\n", name, text, 0 );
 347 #endif
 348                         continue;
 349                 }
 350                 a = attr_find( e->e_attrs, ad );
 351                 if ( !a ) continue;
 352                 if ( ! access_allowed( be, conn, op, e, ad, NULL, ACL_AUTH, NULL ) )
 353                         continue;
 354                 if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) )
 355                         sl->sparams->utils->prop_erase( sl->sparams->propctx, sl->list[i].name );
 356                 for ( bv = a->a_vals; bv->bv_val; bv++ ) {
 357                         sl->sparams->utils->prop_set( sl->sparams->propctx, sl->list[i].name,
 358                                 bv->bv_val, bv->bv_len );
 359                 }
 360         }
 361         return LDAP_SUCCESS;
 362 }
 363
 364 static void
 365 slap_auxprop_lookup(
 366         void *glob_context,
 367         sasl_server_params_t *sparams,
 368         unsigned flags,
 369         const char *user,
 370         unsigned ulen)
 371 {
 372         int rc, i, doit=0;
 373         struct berval dn;
 374         Connection *conn = NULL;
 375         lookup_info sl;
 376
 377         sl.list = sparams->utils->prop_get( sparams->propctx );
 378         sl.sparams = sparams;
 379         sl.flags = flags;
 380
 381         /* Find our DN and conn first */
 382         for( i = 0, sl.last = 0; sl.list[i].name; i++ ) {
 383                 if ( sl.list[i].name[0] == '*' ) {
 384                         if ( !strcmp( sl.list[i].name, slap_propnames[PROP_CONN] ) ) {
 385                                 if ( sl.list[i].values && sl.list[i].values[0] )
 386                                         AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
 387                                 if ( !sl.last ) sl.last = i;
 388                         }
 389                         if ( (flags & SASL_AUXPROP_AUTHZID) &&
 390                                 !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHZ] ) ) {
 391
 392                                 if ( sl.list[i].values && sl.list[i].values[0] )
 393                                         AC_MEMCPY( &dn, sl.list[i].values[0], sizeof( dn ) );
 394                                 if ( !sl.last ) sl.last = i;
 395                                 break;
 396                         }
 397                         if ( !strcmp( sl.list[i].name, slap_propnames[PROP_AUTHC] ) ) {
 398                                 if ( !sl.last ) sl.last = i;
 399                                 if ( sl.list[i].values && sl.list[i].values[0] ) {
 400                                         AC_MEMCPY( &dn, sl.list[i].values[0], sizeof( dn ) );
 401                                         if ( !(flags & SASL_AUXPROP_AUTHZID) )
 402                                                 break;
 403                                 }
 404                         }
 405                 }
 406         }
 407
 408         /* Now see what else needs to be fetched */
 409         for( i = 0; i < sl.last; i++ ) {
 410                 const char *name = sl.list[i].name;
 411
 412                 if ( name[0] == '*' ) {
 413                         if ( flags & SASL_AUXPROP_AUTHZID ) continue;
 414                         name++;
 415                 } else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
 416                         continue;
 417
 418                 if ( sl.list[i].values ) {
 419                         if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
 420                 }
 421                 doit = 1;
 422         }
 423
 424         if (doit) {
 425                 Backend *be;
 426                 Operation op = {0};
 427                 slap_callback cb = { slap_cb_null_response,
 428                         slap_cb_null_sresult, sasl_ap_lookup, NULL };
 429
 430                 cb.sc_private = &sl;
 431
 432                 be = select_backend( &dn, 0, 1 );
 433
 434                 if ( be && be->be_search ) {
 435                         op.o_tag = LDAP_REQ_SEARCH;
 436                         op.o_protocol = LDAP_VERSION3;
 437                         op.o_ndn = conn->c_ndn;
 438                         op.o_callback = &cb;
 439                         op.o_time = slap_get_time();
 440                         op.o_do_not_cache = 1;
 441                         op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
 442
 443                         (*be->be_search)( be, conn, &op, NULL, &dn,
 444                                 LDAP_SCOPE_BASE, LDAP_DEREF_NEVER, 1, 0,
 445                                 generic_filter, NULL, NULL, 0 );
 446                 }
 447         }
 448 }
 449
 450 static sasl_auxprop_plug_t slap_auxprop_plugin = {
 451         0,      /* Features */
 452         0,      /* spare */
 453         NULL,   /* glob_context */
 454         NULL,   /* auxprop_free */
 455         slap_auxprop_lookup,
 456         "slapd",        /* name */
 457         NULL    /* spare */
 458 };
 459
 460 static int
 461 slap_auxprop_init(
 462         const sasl_utils_t *utils,
 463         int max_version,
 464         int *out_version,
 465         sasl_auxprop_plug_t **plug,
 466         const char *plugname)
 467 {
 468         if ( !out_version | !plug ) return SASL_BADPARAM;
 469
 470         if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
 471
 472         *out_version = SASL_AUXPROP_PLUG_VERSION;
 473         *plug = &slap_auxprop_plugin;
 474         return SASL_OK;
 475 }
 476
 477 typedef struct checkpass_info {
 478         int rc;
 479         struct berval cred;
 480 } checkpass_info;
 481
 482 static int
 483 sasl_cb_checkpass(
 484         BackendDB *be,
 485         Connection *conn,
 486         Operation *op,
 487         Entry *e,
 488         AttributeName *an,
 489         int attrsonly,
 490         LDAPControl **ctrls )
 491 {
 492         slap_callback *tmp = op->o_callback;
 493         checkpass_info *ci = tmp->sc_private;
 494         Attribute *a;
 495         struct berval *bv;
 496
 497         ci->rc = SASL_NOVERIFY;
 498
 499         a = attr_find( e->e_attrs, slap_schema.si_ad_userPassword );
 500         if ( !a ) return 0;
 501         if ( ! access_allowed( be, conn, op, e, slap_schema.si_ad_userPassword,
 502                 NULL, ACL_AUTH, NULL ) ) return 0;
 503
 504         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 505                 if ( !lutil_passwd( bv, &ci->cred, NULL ) ) {
 506                         ci->rc = SASL_OK;
 507                         break;
 508                 }
 509         }
 510         return 0;
 511 }
 512
 513 static int
 514 slap_sasl_checkpass(
 515         sasl_conn_t *sconn,
 516         void *context,
 517         const char *username,
 518         const char *pass,
 519         unsigned passlen,
 520         struct propctx *propctx)
 521 {
 522         Connection *conn = (Connection *)context;
 523         struct berval dn;
 524         int rc;
 525         Backend *be;
 526         checkpass_info ci;
 527
 528         ci.rc = SASL_NOUSER;
 529
 530         /* SASL will fallback to its own mechanisms if we don't
 531          * find an answer here.
 532          */
 533
 534         rc = slap_sasl_getdn( conn, (char *)username, 0, NULL, &dn,
 535                 SLAP_GETDN_AUTHCID );
 536         if ( rc != LDAP_SUCCESS ) {
 537                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 538                 return SASL_NOUSER;
 539         }
 540
 541         if ( dn.bv_len == 0 ) {
 542                 sasl_seterror( sconn, 0,
 543                         "No password is associated with the Root DSE" );
 544                 if ( dn.bv_val != NULL ) {
 545                         ch_free( dn.bv_val );
 546                 }
 547                 return SASL_NOUSER;
 548         }
 549
 550         be = select_backend( &dn, 0, 1 );
 551         if ( be && be->be_search ) {
 552                 Operation op = {0};
 553                 slap_callback cb = { slap_cb_null_response,
 554                         slap_cb_null_sresult, sasl_cb_checkpass, NULL };
 555
 556                 ci.cred.bv_val = (char *)pass;
 557                 ci.cred.bv_len = passlen;
 558
 559                 cb.sc_private = &ci;
 560                 op.o_tag = LDAP_REQ_SEARCH;
 561                 op.o_protocol = LDAP_VERSION3;
 562                 op.o_ndn = conn->c_ndn;
 563                 op.o_callback = &cb;
 564                 op.o_time = slap_get_time();
 565                 op.o_do_not_cache = 1;
 566                 op.o_threadctx = conn->c_sasl_bindop->o_threadctx;
 567
 568                 (*be->be_search)( be, conn, &op, NULL, &dn,
 569                         LDAP_SCOPE_BASE, LDAP_DEREF_NEVER, 1, 0,
 570                         generic_filter, NULL, NULL, 0 );
 571         }
 572         if ( ci.rc != SASL_OK ) {
 573                 sasl_seterror( sconn, 0,
 574                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 575         }
 576
 577         ch_free( dn.bv_val );
 578
 579         return ci.rc;
 580 }
 581
 582 /* Convert a SASL authcid or authzid into a DN. Store the DN in an
 583  * auxiliary property, so that we can refer to it in sasl_authorize
 584  * without interfering with anything else. Also, the SASL username
 585  * buffer is constrained to 256 characters, and our DNs could be
 586  * much longer (totally arbitrary length)...
 587  */
 588 static int
 589 slap_sasl_canonicalize(
 590         sasl_conn_t *sconn,
 591         void *context,
 592         const char *in,
 593         unsigned inlen,
 594         unsigned flags,
 595         const char *user_realm,
 596         char *out,
 597         unsigned out_max,
 598         unsigned *out_len)
 599 {
 600         Connection *conn = (Connection *)context;
 601         struct propctx *props = sasl_auxprop_getctx( sconn );
 602         struct propval auxvals[3];
 603         struct berval dn;
 604         int rc, which;
 605         const char *names[2];
 606
 607         *out_len = 0;
 608
 609 #ifdef NEW_LOGGING
 610         LDAP_LOG( TRANSPORT, ENTRY,
 611                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 612                 conn ? conn->c_connid : -1,
 613                 (flags & SASL_CU_AUTHID) ? "authcid" : "authzid", in ? in : "<empty>");
 614 #else
 615         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 616                 "%s=\"%s\"\n",
 617                         conn ? conn->c_connid : -1,
 618                         (flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
 619                         in ? in : "<empty>" );
 620 #endif
 621
 622         /* If name is too big, just truncate. We don't care, we're
 623          * using DNs, not the usernames.
 624          */
 625         if ( inlen > out_max )
 626                 inlen = out_max-1;
 627
 628         /* See if we need to add request, can only do it once */
 629         prop_getnames( props, slap_propnames, auxvals );
 630         if ( !auxvals[0].name )
 631                 prop_request( props, slap_propnames );
 632
 633         if ( flags & SASL_CU_AUTHID )
 634                 which = PROP_AUTHC;
 635         else
 636                 which = PROP_AUTHZ;
 637
 638         /* Need to store the Connection for auxprop_lookup */
 639         if ( !auxvals[PROP_CONN].values ) {
 640                 names[0] = slap_propnames[PROP_CONN];
 641                 names[1] = NULL;
 642                 prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
 643         }
 644
 645         /* Already been here? */
 646         if ( auxvals[which].values )
 647                 goto done;
 648
 649         /* Normally we require an authzID to have a u: or dn: prefix.
 650          * However, SASL frequently gives us an authzID that is just
 651          * an exact copy of the authcID, without a prefix. We need to
 652          * detect and allow this condition. If SASL calls canonicalize
 653          * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
 654          * But if it's broken into two calls, we need to remember the
 655          * authcID so that we can compare the authzID later. We store
 656          * the authcID temporarily in conn->c_sasl_dn. We necessarily
 657          * finish Canonicalizing before Authorizing, so there is no
 658          * conflict with slap_sasl_authorize's use of this temp var.
 659          *
 660          * The SASL EXTERNAL mech is backwards from all the other mechs,
 661          * it does authzID before the authcID. If we see that authzID
 662          * has already been done, don't do anything special with authcID.
 663          */
 664         if ( flags == SASL_CU_AUTHID && !auxvals[PROP_AUTHZ].values ) {
 665                 conn->c_sasl_dn.bv_val = (char *) in;
 666         } else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
 667                 rc = strcmp( in, conn->c_sasl_dn.bv_val );
 668                 conn->c_sasl_dn.bv_val = NULL;
 669                 /* They were equal, no work needed */
 670                 if ( !rc ) goto done;
 671         }
 672
 673         rc = slap_sasl_getdn( conn, (char *)in, inlen, (char *)user_realm, &dn,
 674                 (flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
 675         if ( rc != LDAP_SUCCESS ) {
 676                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 677                 return SASL_NOAUTHZ;
 678         }
 679
 680         names[0] = slap_propnames[which];
 681         names[1] = NULL;
 682
 683         prop_set( props, names[0], (char *)&dn, sizeof( dn ) );
 684
 685 #ifdef NEW_LOGGING
 686         LDAP_LOG( TRANSPORT, ENTRY,
 687                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 688                 conn ? conn->c_connid : -1, names[0]+1, dn.bv_val );
 689 #else
 690         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 691                 "%s=\"%s\"\n",
 692                         conn ? conn->c_connid : -1,
 693                         names[0]+1, dn.bv_val );
 694 #endif
 695 done:   AC_MEMCPY( out, in, inlen );
 696         out[inlen] = '\0';
 697
 698         *out_len = inlen;
 699
 700         return SASL_OK;
 701 }
 702
 703 static int
 704 slap_sasl_authorize(
 705         sasl_conn_t *sconn,
 706         void *context,
 707         char *requested_user,
 708         unsigned rlen,
 709         char *auth_identity,
 710         unsigned alen,
 711         const char *def_realm,
 712         unsigned urlen,
 713         struct propctx *props)
 714 {
 715         Connection *conn = (Connection *)context;
 716         struct propval auxvals[3];
 717         struct berval authcDN, authzDN;
 718         int rc;
 719
 720 #ifdef NEW_LOGGING
 721         LDAP_LOG( TRANSPORT, ENTRY,
 722                 "slap_sasl_authorize: conn %d authcid=\"%s\" authzid=\"%s\"\n",
 723                 conn ? conn->c_connid : -1, auth_identity, requested_user);
 724 #else
 725         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 726                 "authcid=\"%s\" authzid=\"%s\"\n",
 727                 conn ? conn->c_connid : -1, auth_identity, requested_user );
 728 #endif
 729         if ( conn->c_sasl_dn.bv_val ) {
 730                 ch_free( conn->c_sasl_dn.bv_val );
 731                 conn->c_sasl_dn.bv_val = NULL;
 732                 conn->c_sasl_dn.bv_len = 0;
 733         }
 734
 735         /* Skip PROP_CONN */
 736         prop_getnames( props, slap_propnames+1, auxvals );
 737
 738         AC_MEMCPY( &authcDN, auxvals[0].values[0], sizeof(authcDN) );
 739
 740         /* Nothing to do if no authzID was given */
 741         if ( !auxvals[1].name || !auxvals[1].values ) {
 742                 conn->c_sasl_dn = authcDN;
 743                 goto ok;
 744         }
 745
 746         AC_MEMCPY( &authzDN, auxvals[1].values[0], sizeof(authzDN) );
 747
 748         rc = slap_sasl_authorized( conn, &authcDN, &authzDN );
 749         ch_free( authcDN.bv_val );
 750         if ( rc != LDAP_SUCCESS ) {
 751 #ifdef NEW_LOGGING
 752                 LDAP_LOG( TRANSPORT, INFO,
 753                         "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 754                         (long)(conn ? conn->c_connid : -1), rc, 0 );
 755 #else
 756                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 757                         " authorization disallowed (%d)\n",
 758                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 759 #endif
 760
 761                 sasl_seterror( sconn, 0, "not authorized" );
 762                 ch_free( authzDN.bv_val );
 763                 return SASL_NOAUTHZ;
 764         }
 765
 766         conn->c_sasl_dn = authzDN;
 767 ok:
 768         if (conn->c_sasl_bindop) {
 769                 Statslog( LDAP_DEBUG_STATS,
 770                         "conn=%lu op=%lu BIND authcid=\"%s\"\n",
 771                         conn->c_connid, conn->c_sasl_bindop->o_opid,
 772                         auth_identity, 0, 0);
 773         }
 774
 775 #ifdef NEW_LOGGING
 776         LDAP_LOG( TRANSPORT, ENTRY,
 777                 "slap_sasl_authorize: conn %d authorization allowed\n",
 778                 (long)(conn ? conn->c_connid : -1), 0, 0 );
 779 #else
 780         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 781                 " authorization allowed\n",
 782                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 783 #endif
 784         return SASL_OK;
 785 }
 786 #else
 787 static int
 788 slap_sasl_authorize(
 789         void *context,
 790         char *authcid,
 791         char *authzid,
 792         const char **user,
 793         const char **errstr)
 794 {
 795         struct berval authcDN, authzDN;
 796         int rc;
 797         Connection *conn = context;
 798         char *realm;
 799
 800         *user = NULL;
 801         if ( conn->c_sasl_dn.bv_val ) {
 802                 ch_free( conn->c_sasl_dn.bv_val );
 803                 conn->c_sasl_dn.bv_val = NULL;
 804                 conn->c_sasl_dn.bv_len = 0;
 805         }
 806
 807 #ifdef NEW_LOGGING
 808         LDAP_LOG( TRANSPORT, ENTRY,
 809                 "slap_sasl_authorize: conn %d    authcid=\"%s\" authzid=\"%s\"\n",
 810                 conn ? conn->c_connid : -1, authcid ? authcid : "<empty>",
 811                 authzid ? authzid : "<empty>" );
 812 #else
 813         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 814                 "authcid=\"%s\" authzid=\"%s\"\n",
 815                 (long) (conn ? conn->c_connid : -1),
 816                 authcid ? authcid : "<empty>",
 817                 authzid ? authzid : "<empty>" );
 818 #endif
 819
 820         /* Figure out how much data we have for the dn */
 821         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 822         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 823 #ifdef NEW_LOGGING
 824                 LDAP_LOG( TRANSPORT, ERR,
 825                         "slap_sasl_authorize: getprop(REALM) failed.\n", 0, 0, 0 );
 826 #else
 827                 Debug(LDAP_DEBUG_TRACE,
 828                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 829 #endif
 830                 *errstr = "Could not extract realm";
 831                 return SASL_NOAUTHZ;
 832         }
 833
 834         /* Convert the identities to DN's. If no authzid was given, client will
 835            be bound as the DN matching their username */
 836         rc = slap_sasl_getdn( conn, (char *)authcid, 0, realm,
 837                 &authcDN, SLAP_GETDN_AUTHCID );
 838         if( rc != LDAP_SUCCESS ) {
 839                 *errstr = ldap_err2string( rc );
 840                 return SASL_NOAUTHZ;
 841         }
 842         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 843 #ifdef NEW_LOGGING
 844                 LDAP_LOG( TRANSPORT, ENTRY,
 845                         "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 846                         conn ? conn->c_connid : -1, authcDN.bv_val, 0 );
 847 #else
 848                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 849                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 850 #endif
 851
 852                 conn->c_sasl_dn = authcDN;
 853                 goto ok;
 854         }
 855         rc = slap_sasl_getdn( conn, (char *)authzid, 0, realm,
 856                 &authzDN, SLAP_GETDN_AUTHZID );
 857         if( rc != LDAP_SUCCESS ) {
 858                 ch_free( authcDN.bv_val );
 859                 *errstr = ldap_err2string( rc );
 860                 return SASL_NOAUTHZ;
 861         }
 862
 863         rc = slap_sasl_authorized(conn, &authcDN, &authzDN );
 864         ch_free( authcDN.bv_val );
 865         if( rc ) {
 866 #ifdef NEW_LOGGING
 867                 LDAP_LOG( TRANSPORT, INFO,
 868                         "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 869                         (long)(conn ? conn->c_connid : -1), rc, 0 );
 870 #else
 871                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 872                         " authorization disallowed (%d)\n",
 873                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 874 #endif
 875
 876                 *errstr = "not authorized";
 877                 ch_free( authzDN.bv_val );
 878                 return SASL_NOAUTHZ;
 879         }
 880         conn->c_sasl_dn = authzDN;
 881
 882 ok:
 883 #ifdef NEW_LOGGING
 884         LDAP_LOG( TRANSPORT, RESULTS,
 885                 "slap_sasl_authorize: conn %d authorization allowed\n",
 886            (long)(conn ? conn->c_connid : -1 ), 0, 0 );
 887 #else
 888         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 889                 " authorization allowed\n",
 890                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 891 #endif
 892
 893         if (conn->c_sasl_bindop) {
 894                 Statslog( LDAP_DEBUG_STATS,
 895                         "conn=%lu op=%lu BIND authcid=\"%s\"\n",
 896                         conn->c_connid, conn->c_sasl_bindop->o_opid,
 897                         authcid, 0, 0);
 898         }
 899
 900         *errstr = NULL;
 901         return SASL_OK;
 902 }
 903 #endif /* SASL_VERSION_MAJOR >= 2 */
 904
 905 static int
 906 slap_sasl_err2ldap( int saslerr )
 907 {
 908         int rc;
 909
 910         switch (saslerr) {
 911                 case SASL_CONTINUE:
 912                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 913                         break;
 914                 case SASL_FAIL:
 915                         rc = LDAP_OTHER;
 916                         break;
 917                 case SASL_NOMEM:
 918                         rc = LDAP_OTHER;
 919                         break;
 920                 case SASL_NOMECH:
 921                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 922                         break;
 923                 case SASL_BADAUTH:
 924                         rc = LDAP_INVALID_CREDENTIALS;
 925                         break;
 926                 case SASL_NOAUTHZ:
 927                         rc = LDAP_INSUFFICIENT_ACCESS;
 928                         break;
 929                 case SASL_TOOWEAK:
 930                 case SASL_ENCRYPT:
 931                         rc = LDAP_INAPPROPRIATE_AUTH;
 932                         break;
 933                 default:
 934                         rc = LDAP_OTHER;
 935                         break;
 936         }
 937
 938         return rc;
 939 }
 940 #endif
 941
 942 int slap_sasl_init( void )
 943 {
 944 #ifdef HAVE_CYRUS_SASL
 945         int rc;
 946         static sasl_callback_t server_callbacks[] = {
 947                 { SASL_CB_LOG, &slap_sasl_log, NULL },
 948                 { SASL_CB_LIST_END, NULL, NULL }
 949         };
 950
 951 #ifdef HAVE_SASL_VERSION
 952 #define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
 953         (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
 954
 955         sasl_version( NULL, &rc );
 956         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
 957                 (rc & 0xffff) < SASL_VERSION_STEP) {
 958
 959 #ifdef NEW_LOGGING
 960                 LDAP_LOG( TRANSPORT, INFO,
 961                 "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
 962                         rc, SASL_BUILD_VERSION, 0 );
 963 #else
 964                 Debug( LDAP_DEBUG_ANY,
 965                 "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
 966                         rc, SASL_BUILD_VERSION, 0 );
 967 #endif
 968                 return -1;
 969         }
 970 #endif
 971
 972         /* SASL 2 does its own memory management internally */
 973 #if SASL_VERSION_MAJOR < 2
 974         sasl_set_alloc(
 975                 ber_memalloc,
 976                 ber_memcalloc,
 977                 ber_memrealloc,
 978                 ber_memfree );
 979 #endif
 980
 981         sasl_set_mutex(
 982                 ldap_pvt_sasl_mutex_new,
 983                 ldap_pvt_sasl_mutex_lock,
 984                 ldap_pvt_sasl_mutex_unlock,
 985                 ldap_pvt_sasl_mutex_dispose );
 986
 987 #if SASL_VERSION_MAJOR >= 2
 988         sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
 989 #endif
 990         /* should provide callbacks for logging */
 991         /* server name should be configurable */
 992         rc = sasl_server_init( server_callbacks, "slapd" );
 993
 994         if( rc != SASL_OK ) {
 995 #ifdef NEW_LOGGING
 996                 LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: init failed.\n", 0, 0, 0 );
 997 #else
 998                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
 999                         0, 0, 0 );
1000 #endif
1001 #if SASL_VERSION_MAJOR < 2
1002                 /* A no-op used to make sure we linked with Cyrus 1.5 */
1003                 sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
1004 #endif
1005
1006                 return -1;
1007         }
1008
1009 #ifdef NEW_LOGGING
1010         LDAP_LOG( TRANSPORT, INFO, "slap_sasl_init: initialized!\n", 0, 0, 0 );
1011 #else
1012         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
1013                 0, 0, 0 );
1014 #endif
1015
1016
1017         /* default security properties */
1018         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
1019         sasl_secprops.max_ssf = INT_MAX;
1020         sasl_secprops.maxbufsize = 65536;
1021         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
1022 #endif
1023
1024         return 0;
1025 }
1026
1027 int slap_sasl_destroy( void )
1028 {
1029 #ifdef HAVE_CYRUS_SASL
1030         sasl_done();
1031 #endif
1032 #if SASL_VERSION_MAJOR >= 2
1033         filter_free( generic_filter );
1034 #endif
1035         free( global_host );
1036         global_host = NULL;
1037
1038         return 0;
1039 }
1040
1041 int slap_sasl_open( Connection *conn )
1042 {
1043         int cb, sc = LDAP_SUCCESS;
1044 #if SASL_VERSION_MAJOR >= 2
1045         char *ipremoteport = NULL, *iplocalport = NULL;
1046 #endif
1047
1048 #ifdef HAVE_CYRUS_SASL
1049         sasl_conn_t *ctx = NULL;
1050         sasl_callback_t *session_callbacks;
1051
1052         assert( conn->c_sasl_context == NULL );
1053         assert( conn->c_sasl_extra == NULL );
1054
1055         conn->c_sasl_layers = 0;
1056
1057         session_callbacks =
1058 #if SASL_VERSION_MAJOR >= 2
1059                 SLAP_CALLOC( 5, sizeof(sasl_callback_t));
1060 #else
1061                 SLAP_CALLOC( 3, sizeof(sasl_callback_t));
1062 #endif
1063         if( session_callbacks == NULL ) {
1064 #ifdef NEW_LOGGING
1065                         LDAP_LOG( TRANSPORT, ERR,
1066                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1067 #else
1068                         Debug( LDAP_DEBUG_ANY,
1069                                 "slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
1070 #endif
1071                         return -1;
1072         }
1073         conn->c_sasl_extra = session_callbacks;
1074
1075         session_callbacks[cb=0].id = SASL_CB_LOG;
1076         session_callbacks[cb].proc = &slap_sasl_log;
1077         session_callbacks[cb++].context = conn;
1078
1079         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
1080         session_callbacks[cb].proc = &slap_sasl_authorize;
1081         session_callbacks[cb++].context = conn;
1082
1083 #if SASL_VERSION_MAJOR >= 2
1084         session_callbacks[cb].id = SASL_CB_CANON_USER;
1085         session_callbacks[cb].proc = &slap_sasl_canonicalize;
1086         session_callbacks[cb++].context = conn;
1087
1088         /* XXXX: this should be conditional */
1089         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
1090         session_callbacks[cb].proc = &slap_sasl_checkpass;
1091         session_callbacks[cb++].context = conn;
1092 #endif
1093
1094         session_callbacks[cb].id = SASL_CB_LIST_END;
1095         session_callbacks[cb].proc = NULL;
1096         session_callbacks[cb++].context = NULL;
1097
1098         if( global_host == NULL ) {
1099                 global_host = ldap_pvt_get_fqdn( NULL );
1100         }
1101
1102         /* create new SASL context */
1103 #if SASL_VERSION_MAJOR >= 2
1104         if ( generic_filter == NULL ) {
1105                 generic_filter = str2filter( "(objectclass=*)" );
1106         }
1107         if ( conn->c_sock_name.bv_len != 0 &&
1108              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
1109                 char *p;
1110
1111                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
1112                 /* Convert IPv6 addresses to address;port syntax. */
1113                 p = strrchr( iplocalport, ' ' );
1114                 /* Convert IPv4 addresses to address;port syntax. */
1115                 if ( p == NULL ) p = strchr( iplocalport, ':' );
1116                 if ( p != NULL ) {
1117                         *p = ';';
1118                 }
1119         }
1120         if ( conn->c_peer_name.bv_len != 0 &&
1121              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
1122                 char *p;
1123
1124                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
1125                 /* Convert IPv6 addresses to address;port syntax. */
1126                 p = strrchr( ipremoteport, ' ' );
1127                 /* Convert IPv4 addresses to address;port syntax. */
1128                 if ( p == NULL ) p = strchr( ipremoteport, ':' );
1129                 if ( p != NULL ) {
1130                         *p = ';';
1131                 }
1132         }
1133         sc = sasl_server_new( "ldap", global_host, global_realm,
1134                 iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
1135         if ( iplocalport != NULL ) {
1136                 ch_free( iplocalport );
1137         }
1138         if ( ipremoteport != NULL ) {
1139                 ch_free( ipremoteport );
1140         }
1141 #else
1142         sc = sasl_server_new( "ldap", global_host, global_realm,
1143                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
1144 #endif
1145
1146         if( sc != SASL_OK ) {
1147 #ifdef NEW_LOGGING
1148                 LDAP_LOG( TRANSPORT, ERR,
1149                         "slap_sasl_open: sasl_server_new failed: %d\n", sc, 0, 0 );
1150 #else
1151                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
1152                         sc, 0, 0 );
1153 #endif
1154
1155                 return -1;
1156         }
1157
1158         conn->c_sasl_context = ctx;
1159
1160         if( sc == SASL_OK ) {
1161                 sc = sasl_setprop( ctx,
1162                         SASL_SEC_PROPS, &sasl_secprops );
1163
1164                 if( sc != SASL_OK ) {
1165 #ifdef NEW_LOGGING
1166                         LDAP_LOG( TRANSPORT, ERR,
1167                                 "slap_sasl_open: sasl_setprop failed: %d \n", sc, 0, 0 );
1168 #else
1169                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
1170                                 sc, 0, 0 );
1171 #endif
1172
1173                         slap_sasl_close( conn );
1174                         return -1;
1175                 }
1176         }
1177
1178         sc = slap_sasl_err2ldap( sc );
1179 #endif
1180         return sc;
1181 }
1182
1183 int slap_sasl_external(
1184         Connection *conn,
1185         slap_ssf_t ssf,
1186         const char *auth_id )
1187 {
1188 #if SASL_VERSION_MAJOR >= 2
1189         int sc;
1190         sasl_conn_t *ctx = conn->c_sasl_context;
1191
1192         if ( ctx == NULL ) {
1193                 return LDAP_UNAVAILABLE;
1194         }
1195
1196         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
1197
1198         if ( sc != SASL_OK ) {
1199                 return LDAP_OTHER;
1200         }
1201
1202         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
1203
1204         if ( sc != SASL_OK ) {
1205                 return LDAP_OTHER;
1206         }
1207
1208 #elif defined(HAVE_CYRUS_SASL)
1209         int sc;
1210         sasl_conn_t *ctx = conn->c_sasl_context;
1211         sasl_external_properties_t extprops;
1212
1213         if ( ctx == NULL ) {
1214                 return LDAP_UNAVAILABLE;
1215         }
1216
1217         memset( &extprops, '\0', sizeof(extprops) );
1218         extprops.ssf = ssf;
1219         extprops.auth_id = (char *) auth_id;
1220
1221         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1222                 (void *) &extprops );
1223
1224         if ( sc != SASL_OK ) {
1225                 return LDAP_OTHER;
1226         }
1227 #endif
1228
1229         return LDAP_SUCCESS;
1230 }
1231
1232 int slap_sasl_reset( Connection *conn )
1233 {
1234 #ifdef HAVE_CYRUS_SASL
1235         sasl_conn_t *ctx = conn->c_sasl_context;
1236
1237         if( ctx != NULL ) {
1238         }
1239 #endif
1240         /* must return "anonymous" */
1241         return LDAP_SUCCESS;
1242 }
1243
1244 char ** slap_sasl_mechs( Connection *conn )
1245 {
1246         char **mechs = NULL;
1247
1248 #ifdef HAVE_CYRUS_SASL
1249         sasl_conn_t *ctx = conn->c_sasl_context;
1250
1251         if( ctx != NULL ) {
1252                 int sc;
1253                 SASL_CONST char *mechstr;
1254
1255                 sc = sasl_listmech( ctx,
1256                         NULL, NULL, ",", NULL,
1257                         &mechstr, NULL, NULL );
1258
1259                 if( sc != SASL_OK ) {
1260 #ifdef NEW_LOGGING
1261                         LDAP_LOG( TRANSPORT, ERR,
1262                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc, 0, 0 );
1263 #else
1264                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
1265                                 sc, 0, 0 );
1266 #endif
1267
1268                         return NULL;
1269                 }
1270
1271                 mechs = ldap_str2charray( mechstr, "," );
1272
1273 #if SASL_VERSION_MAJOR < 2
1274                 ch_free( mechstr );
1275 #endif
1276         }
1277 #endif
1278
1279         return mechs;
1280 }
1281
1282 int slap_sasl_close( Connection *conn )
1283 {
1284 #ifdef HAVE_CYRUS_SASL
1285         sasl_conn_t *ctx = conn->c_sasl_context;
1286
1287         if( ctx != NULL ) {
1288                 sasl_dispose( &ctx );
1289         }
1290
1291         conn->c_sasl_context = NULL;
1292
1293         free( conn->c_sasl_extra );
1294         conn->c_sasl_extra = NULL;
1295 #endif
1296
1297         return LDAP_SUCCESS;
1298 }
1299
1300 int slap_sasl_bind(
1301     Connection          *conn,
1302     Operation           *op,
1303     struct berval       *dn,
1304     struct berval       *ndn,
1305     struct berval       *cred,
1306         struct berval                   *edn,
1307         slap_ssf_t              *ssfp )
1308 {
1309         int rc = 1;
1310
1311 #ifdef HAVE_CYRUS_SASL
1312         sasl_conn_t *ctx = conn->c_sasl_context;
1313         struct berval response;
1314         unsigned reslen = 0;
1315         const char *errstr = NULL;
1316         int sc;
1317
1318 #ifdef NEW_LOGGING
1319         LDAP_LOG( TRANSPORT, ENTRY,
1320                 "sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1321                 dn->bv_len ? dn->bv_val : "",
1322                 conn->c_sasl_bind_in_progress ? "<continuing>" :
1323                 conn->c_sasl_bind_mech.bv_val,
1324                 cred ? cred->bv_len : 0 );
1325 #else
1326         Debug(LDAP_DEBUG_ARGS,
1327                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
1328                 dn->bv_len ? dn->bv_val : "",
1329                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
1330                 cred ? cred->bv_len : 0 );
1331 #endif
1332
1333
1334         if( ctx == NULL ) {
1335                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
1336                         NULL, "SASL unavailable on this session", NULL, NULL );
1337                 return rc;
1338         }
1339
1340 #if SASL_VERSION_MAJOR >= 2
1341 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1342         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
1343 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1344         sasl_server_step( ctx, cred, clen, resp, rlen )
1345 #else
1346 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
1347         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
1348 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1349         sasl_server_step( ctx, cred, clen, resp, rlen, err )
1350 #endif
1351
1352         if ( !conn->c_sasl_bind_in_progress ) {
1353                 sc = START( ctx,
1354                         conn->c_sasl_bind_mech.bv_val,
1355                         cred->bv_val, cred->bv_len,
1356                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1357
1358         } else {
1359                 sc = STEP( ctx,
1360                         cred->bv_val, cred->bv_len,
1361                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1362         }
1363
1364         response.bv_len = reslen;
1365
1366         if ( sc == SASL_OK ) {
1367                 sasl_ssf_t *ssf = NULL;
1368
1369                 *edn = conn->c_sasl_dn;
1370                 conn->c_sasl_dn.bv_val = NULL;
1371                 conn->c_sasl_dn.bv_len = 0;
1372
1373                 rc = LDAP_SUCCESS;
1374
1375                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1376                 *ssfp = ssf ? *ssf : 0;
1377
1378                 if( *ssfp ) {
1379                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1380                         conn->c_sasl_layers++;
1381                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1382                 }
1383
1384                 send_ldap_sasl( conn, op, rc,
1385                         NULL, NULL, NULL, NULL,
1386                         response.bv_len ? &response : NULL );
1387
1388         } else if ( sc == SASL_CONTINUE ) {
1389                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1390                         NULL, NULL, NULL, NULL, &response );
1391
1392         } else {
1393 #if SASL_VERSION_MAJOR >= 2
1394                 errstr = sasl_errdetail( ctx );
1395 #endif
1396                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1397                         NULL, errstr, NULL, NULL );
1398         }
1399
1400 #if SASL_VERSION_MAJOR < 2
1401         if( response.bv_len ) {
1402                 ch_free( response.bv_val );
1403         }
1404 #endif
1405
1406 #ifdef NEW_LOGGING
1407         LDAP_LOG( TRANSPORT, RESULTS, "slap_sasl_bind: rc=%d\n", rc, 0, 0 );
1408 #else
1409         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1410 #endif
1411
1412
1413 #else
1414         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1415                 NULL, "SASL not supported", NULL, NULL );
1416 #endif
1417
1418         return rc;
1419 }
1420
1421 char* slap_sasl_secprops( const char *in )
1422 {
1423 #ifdef HAVE_CYRUS_SASL
1424         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1425
1426         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1427 #else
1428         return "SASL not supported";
1429 #endif
1430 }
1431
1432 #ifdef HAVE_CYRUS_SASL
1433 int
1434 slap_sasl_setpass(
1435         Connection      *conn,
1436         Operation       *op,
1437         const char      *reqoid,
1438         struct berval   *reqdata,
1439         char            **rspoid,
1440         struct berval   **rspdata,
1441         LDAPControl     *** rspctrls,
1442         const char      **text )
1443 {
1444         int rc;
1445         struct berval id = { 0, NULL }; /* needs to come from connection */
1446         struct berval new = { 0, NULL };
1447         struct berval old = { 0, NULL };
1448
1449         assert( reqoid != NULL );
1450         assert( strcmp( LDAP_EXOP_MODIFY_PASSWD, reqoid ) == 0 );
1451
1452         rc = sasl_getprop( conn->c_sasl_context, SASL_USERNAME,
1453                 (SASL_CONST void **)&id.bv_val );
1454
1455         if( rc != SASL_OK ) {
1456                 *text = "unable to retrieve SASL username";
1457                 rc = LDAP_OTHER;
1458                 goto done;
1459         }
1460
1461 #ifdef NEW_LOGGING
1462         LDAP_LOG( BACKEND, ENTRY,
1463                 "slap_sasl_setpass: \"%s\"\n",
1464                 id.bv_val ? id.bv_val : "", 0, 0);
1465 #else
1466         Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
1467                 id.bv_val ? id.bv_val : "", 0, 0 );
1468 #endif
1469
1470         rc = slap_passwd_parse( reqdata,
1471                 NULL, &old, &new, text );
1472
1473         if( rc != LDAP_SUCCESS ) {
1474                 goto done;
1475         }
1476
1477         if( new.bv_len == 0 ) {
1478                 slap_passwd_generate(&new);
1479
1480                 if( new.bv_len == 0 ) {
1481                         *text = "password generation failed.";
1482                         rc = LDAP_OTHER;
1483                         goto done;
1484                 }
1485
1486                 *rspdata = slap_passwd_return( &new );
1487         }
1488
1489 #if SASL_VERSION_MAJOR < 2
1490         rc = sasl_setpass( conn->c_sasl_context,
1491                 id.bv_val, new.bv_val, new.bv_len, 0, text );
1492 #else
1493         rc = sasl_setpass( conn->c_sasl_context, id.bv_val,
1494                 new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
1495         if( rc != SASL_OK ) {
1496                 *text = sasl_errdetail( conn->c_sasl_context );
1497         }
1498 #endif
1499         switch(rc) {
1500                 case SASL_OK:
1501                         rc = LDAP_SUCCESS;
1502                         break;
1503
1504                 case SASL_NOCHANGE:
1505                 case SASL_NOMECH:
1506                 case SASL_DISABLED:
1507                 case SASL_PWLOCK:
1508                 case SASL_FAIL:
1509                 case SASL_BADPARAM:
1510                 default:
1511                         rc = LDAP_OTHER;
1512         }
1513
1514 done:
1515         return rc;
1516 }
1517 #endif /* HAVE_CYRUS_SASL */
1518
1519 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
1520    string returned in *dn is in its own allocated memory, and must be free'd
1521    by the calling process.
1522    -Mark Adamson, Carnegie Mellon
1523
1524    The "dn:" prefix is no longer used anywhere inside slapd. It is only used
1525    on strings passed in directly from SASL.
1526    -Howard Chu, Symas Corp.
1527 */
1528
1529 #define SET_DN  1
1530 #define SET_U   2
1531
1532 static struct berval ext_bv = BER_BVC( "EXTERNAL" );
1533
1534 int slap_sasl_getdn( Connection *conn, char *id, int len,
1535         char *user_realm, struct berval *dn, int flags )
1536 {
1537         char *c1;
1538         int rc, is_dn = 0, do_norm = 1;
1539         struct berval dn2;
1540
1541 #ifdef NEW_LOGGING
1542         LDAP_LOG( TRANSPORT, ENTRY,
1543                 "slap_sasl_getdn: conn %d id=%s\n",
1544                 conn ? conn->c_connid : -1, id ? (*id ? id : "<empty>") : "NULL", 0 );
1545 #else
1546         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
1547       id?(*id?id:"<empty>"):"NULL",0,0 );
1548 #endif
1549
1550         dn->bv_val = NULL;
1551         dn->bv_len = 0;
1552
1553         if ( id ) {
1554                 if ( len == 0 ) len = strlen( id );
1555
1556                 /* Blatantly anonymous ID */
1557                 if ( len == sizeof("anonymous") - 1 &&
1558                         !strcasecmp( id, "anonymous" ) ) {
1559                         return( LDAP_SUCCESS );
1560                 }
1561         } else {
1562                 len = 0;
1563         }
1564
1565         /* An authcID needs to be converted to authzID form. Set the
1566          * values directly into *dn; they will be normalized later. (and
1567          * normalizing always makes a new copy.) An ID from a TLS certificate
1568          * is already normalized, so copy it and skip normalization.
1569          */
1570         if( flags & SLAP_GETDN_AUTHCID ) {
1571                 if( conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len &&
1572                         strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 )
1573                 {
1574                         /* EXTERNAL DNs are already normalized */
1575                         do_norm = 0;
1576                         is_dn = SET_DN;
1577                         ber_str2bv( id, len, 1, dn );
1578
1579                 } else {
1580                         /* convert to u:<username> form */
1581                         is_dn = SET_U;
1582                         dn->bv_val = id;
1583                         dn->bv_len = len;
1584                 }
1585         }
1586         if( !is_dn ) {
1587                 if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
1588                         is_dn = SET_U;
1589                         dn->bv_val = id+2;
1590                         dn->bv_len = len-2;
1591                 } else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
1592                         is_dn = SET_DN;
1593                         dn->bv_val = id+3;
1594                         dn->bv_len = len-3;
1595                 }
1596         }
1597
1598         /* No other possibilities from here */
1599         if( !is_dn ) {
1600                 dn->bv_val = NULL;
1601                 dn->bv_len = 0;
1602                 return( LDAP_INAPPROPRIATE_AUTH );
1603         }
1604
1605         /* Username strings */
1606         if( is_dn == SET_U ) {
1607                 char *p, *realm;
1608                 len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
1609
1610                 /* username may have embedded realm name */
1611                 if( ( realm = strchr( dn->bv_val, '@') ) ) {
1612                         *realm++ = '\0';
1613                         len += sizeof(",cn=")-2;
1614                 } else if( user_realm && *user_realm ) {
1615                         len += strlen( user_realm ) + sizeof(",cn=")-1;
1616                 }
1617
1618                 if( conn->c_sasl_bind_mech.bv_len ) {
1619                         len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
1620                 }
1621
1622                 /* Build the new dn */
1623                 c1 = dn->bv_val;
1624                 dn->bv_val = SLAP_MALLOC( len+1 );
1625                 if( dn->bv_val == NULL ) {
1626 #ifdef NEW_LOGGING
1627                         LDAP_LOG( TRANSPORT, ERR,
1628                                 "slap_sasl_getdn: SLAP_MALLOC failed", 0, 0, 0 );
1629 #else
1630                         Debug( LDAP_DEBUG_ANY,
1631                                 "slap_sasl_getdn: SLAP_MALLOC failed", 0, 0, 0 );
1632 #endif
1633                         return LDAP_OTHER;
1634                 }
1635                 p = lutil_strcopy( dn->bv_val, "uid=" );
1636                 p = lutil_strncopy( p, c1, dn->bv_len );
1637
1638                 if( realm ) {
1639                         int rlen = dn->bv_len - ( realm - c1 );
1640                         p = lutil_strcopy( p, ",cn=" );
1641                         p = lutil_strncopy( p, realm, rlen );
1642                         realm[-1] = '@';
1643                 } else if( user_realm && *user_realm ) {
1644                         p = lutil_strcopy( p, ",cn=" );
1645                         p = lutil_strcopy( p, user_realm );
1646                 }
1647
1648                 if( conn->c_sasl_bind_mech.bv_len ) {
1649                         p = lutil_strcopy( p, ",cn=" );
1650                         p = lutil_strcopy( p, conn->c_sasl_bind_mech.bv_val );
1651                 }
1652                 p = lutil_strcopy( p, ",cn=auth" );
1653                 dn->bv_len = p - dn->bv_val;
1654
1655 #ifdef NEW_LOGGING
1656                 LDAP_LOG( TRANSPORT, ENTRY,
1657                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val, 0, 0 );
1658 #else
1659                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
1660 #endif
1661         }
1662
1663         /* All strings are in DN form now. Normalize if needed. */
1664         if ( do_norm ) {
1665                 rc = dnNormalize2( NULL, dn, &dn2 );
1666
1667                 /* User DNs were constructed above and must be freed now */
1668                 if ( is_dn == SET_U )
1669                         ch_free( dn->bv_val );
1670
1671                 if ( rc != LDAP_SUCCESS ) {
1672                         dn->bv_val = NULL;
1673                         dn->bv_len = 0;
1674                         return rc;
1675                 }
1676                 *dn = dn2;
1677         }
1678
1679         /* Run thru regexp */
1680         slap_sasl2dn( conn, dn, &dn2 );
1681         if( dn2.bv_val ) {
1682                 ch_free( dn->bv_val );
1683                 *dn = dn2;
1684 #ifdef NEW_LOGGING
1685                 LDAP_LOG( TRANSPORT, ENTRY,
1686                         "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val, 0, 0 );
1687 #else
1688                 Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
1689                         dn->bv_val, 0, 0 );
1690 #endif
1691         }
1692
1693         return( LDAP_SUCCESS );
1694 }