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 #if SASL_VERSION_MAJOR >= 2
  28 #include <lutil.h>
  29 #define SASL_CONST const
  30 #else
  31 #define SASL_CONST
  32 #endif
  33
  34 #include <ldap_pvt.h>
  35
  36 #ifdef SLAPD_SPASSWD
  37 #include <lutil.h>
  38 #endif
  39
  40 /* Flags for telling slap_sasl_getdn() what type of identity is being passed */
  41 #define FLAG_GETDN_FINAL   1
  42 #define FLAG_GETDN_AUTHCID 2
  43 #define FLAG_GETDN_AUTHZID 4
  44
  45 static sasl_security_properties_t sasl_secprops;
  46
  47 static int
  48 slap_sasl_log(
  49         void *context,
  50         int priority,
  51         const char *message)
  52 {
  53         Connection *conn = context;
  54         int level;
  55         const char * label;
  56
  57         if ( message == NULL ) {
  58                 return SASL_BADPARAM;
  59         }
  60
  61         switch (priority) {
  62 #if SASL_VERSION_MAJOR >= 2
  63         case SASL_LOG_NONE:
  64                 level = LDAP_DEBUG_NONE;
  65                 label = "None";
  66                 break;
  67         case SASL_LOG_ERR:
  68                 level = LDAP_DEBUG_ANY;
  69                 label = "Error";
  70                 break;
  71         case SASL_LOG_FAIL:
  72                 level = LDAP_DEBUG_ANY;
  73                 label = "Failure";
  74                 break;
  75         case SASL_LOG_WARN:
  76                 level = LDAP_DEBUG_TRACE;
  77                 label = "Warning";
  78                 break;
  79         case SASL_LOG_NOTE:
  80                 level = LDAP_DEBUG_TRACE;
  81                 label = "Notice";
  82                 break;
  83         case SASL_LOG_DEBUG:
  84                 level = LDAP_DEBUG_TRACE;
  85                 label = "Debug";
  86                 break;
  87         case SASL_LOG_TRACE:
  88                 level = LDAP_DEBUG_TRACE;
  89                 label = "Trace";
  90                 break;
  91         case SASL_LOG_PASS:
  92                 level = LDAP_DEBUG_TRACE;
  93                 label = "Password Trace";
  94                 break;
  95 #else
  96         case SASL_LOG_ERR:
  97                 level = LDAP_DEBUG_ANY;
  98                 label = "Error";
  99                 break;
 100         case SASL_LOG_WARNING:
 101                 level = LDAP_DEBUG_TRACE;
 102                 label = "Warning";
 103                 break;
 104         case SASL_LOG_INFO:
 105                 level = LDAP_DEBUG_TRACE;
 106                 label = "Info";
 107                 break;
 108 #endif
 109         default:
 110                 return SASL_BADPARAM;
 111         }
 112
 113 #ifdef NEW_LOGGING
 114         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 115                 "SASL [conn=%ld] %s: %s\n",
 116                 conn ? conn->c_connid : -1,
 117                 label, message ));
 118 #else
 119         Debug( level, "SASL [conn=%ld] %s: %s\n",
 120                 conn ? conn->c_connid: -1,
 121                 label, message );
 122 #endif
 123
 124
 125         return SASL_OK;
 126 }
 127
 128
 129 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
 130    string returned in *dn is in its own allocated memory, and must be free'd
 131    by the calling process.
 132    -Mark Adamson, Carnegie Mellon
 133 */
 134
 135 #define SET_DN  1
 136 #define SET_U   2
 137
 138 static struct berval ext_bv = { sizeof("EXTERNAL")-1, "EXTERNAL" };
 139
 140 int slap_sasl_getdn( Connection *conn, char *id,
 141         char *user_realm, struct berval *dn, int flags )
 142 {
 143         char *c1;
 144         int rc, len, is_dn = 0;
 145         sasl_conn_t *ctx;
 146         struct berval dn2;
 147
 148 #ifdef NEW_LOGGING
 149         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 150                 "slap_sasl_getdn: conn %d id=%s\n",
 151                 conn ? conn->c_connid : -1,
 152                 id ? (*id ? id : "<empty>") : "NULL" ));
 153 #else
 154         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
 155       id?(*id?id:"<empty>"):"NULL",0,0 );
 156 #endif
 157
 158         dn->bv_val = NULL;
 159         dn->bv_len = 0;
 160
 161         /* Blatantly anonymous ID */
 162         if( id &&
 163                 ( id[sizeof( "anonymous" )-1] == '\0'
 164                         || id[sizeof( "anonymous" )-1] == '@' ) &&
 165                 !strncasecmp( id, "anonymous", sizeof( "anonymous" )-1) ) {
 166                 return( LDAP_SUCCESS );
 167         }
 168         ctx = conn->c_sasl_context;
 169         len = strlen( id );
 170
 171         /* An authcID needs to be converted to authzID form */
 172         if( flags & FLAG_GETDN_AUTHCID ) {
 173                 if( sasl_external_x509dn_convert
 174                         && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
 175                         && ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 )
 176                         && id[0] == '/' )
 177                 {
 178                         /* check SASL external for X.509 style DN and */
 179                         /* convert to dn:<dn> form */
 180                         dn->bv_val = ldap_dcedn2dn( id );
 181                         dn->bv_len = strlen(dn->bv_val);
 182                         is_dn = SET_DN;
 183
 184                 } else {
 185                         /* convert to u:<username> form */
 186                         ber_str2bv( id, len, 1, dn );
 187                         is_dn = SET_U;
 188                 }
 189         }
 190         if( !is_dn ) {
 191                 if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
 192                         is_dn = SET_U;
 193                         ber_str2bv( id+2, len-2, 1, dn );
 194                 } else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
 195                         is_dn = SET_DN;
 196                         ber_str2bv( id+3, len-3, 1, dn );
 197                 }
 198         }
 199
 200         /* An authzID must be properly prefixed */
 201         if( (flags & FLAG_GETDN_AUTHZID) && !is_dn ) {
 202                 free( dn->bv_val );
 203                 dn->bv_val = NULL;
 204                 dn->bv_len = 0;
 205                 return( LDAP_INAPPROPRIATE_AUTH );
 206         }
 207
 208         /* Username strings */
 209         if( is_dn == SET_U ) {
 210                 char *p;
 211                 len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
 212
 213                 if( user_realm && *user_realm ) {
 214                         len += strlen( user_realm ) + sizeof(",cn=")-1;
 215                 }
 216
 217                 if( conn->c_sasl_bind_mech.bv_len ) {
 218                         len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
 219                 }
 220
 221                 /* Build the new dn */
 222                 c1 = dn->bv_val;
 223                 dn->bv_val = ch_malloc( len+1 );
 224                 p = slap_strcopy( dn->bv_val, "uid=" );
 225                 p = slap_strcopy( p, c1 );
 226                 ch_free( c1 );
 227
 228                 if( user_realm && *user_realm ) {
 229                         p = slap_strcopy( p, ",cn=" );
 230                         p = slap_strcopy( p, user_realm );
 231                 }
 232                 if( conn->c_sasl_bind_mech.bv_len ) {
 233                         p = slap_strcopy( p, ",cn=" );
 234                         p = slap_strcopy( p, conn->c_sasl_bind_mech.bv_val );
 235                 }
 236                 p = slap_strcopy( p, ",cn=auth" );
 237                 dn->bv_len = p - dn->bv_val;
 238                 is_dn = SET_DN;
 239
 240 #ifdef NEW_LOGGING
 241                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 242                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val ));
 243 #else
 244                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
 245 #endif
 246         }
 247
 248         /* DN strings that are a cn=auth identity to run through regexp */
 249         if( is_dn == SET_DN && ( ( flags & FLAG_GETDN_FINAL ) == 0 ) )
 250         {
 251                 slap_sasl2dn( dn, &dn2 );
 252                 if( dn2.bv_val ) {
 253                         ch_free( dn->bv_val );
 254                         *dn = dn2;
 255 #ifdef NEW_LOGGING
 256                         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 257                                 "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val ));
 258 #else
 259                         Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
 260                                 dn->bv_val, 0, 0 );
 261 #endif
 262                 }
 263         }
 264
 265         if( flags & FLAG_GETDN_FINAL ) {
 266                 /* omit "dn:" prefix */
 267                 is_dn = 0;
 268         } else {
 269                 rc = dnNormalize2( NULL, dn, &dn2 );
 270                 free(dn->bv_val);
 271                 if ( rc != LDAP_SUCCESS ) {
 272                         *dn = slap_empty_bv;
 273                         return rc;
 274                 }
 275                 *dn = dn2;
 276         }
 277
 278         /* Attach the "dn:" prefix if needed */
 279         if ( is_dn == SET_DN ) {
 280                 c1 = ch_malloc( dn->bv_len + sizeof("dn:") );
 281                 strcpy( c1, "dn:" );
 282                 strcpy( c1 + 3, dn->bv_val );
 283                 free( dn->bv_val );
 284                 dn->bv_val = c1;
 285                 dn->bv_len += 3;
 286         }
 287
 288         return( LDAP_SUCCESS );
 289 }
 290
 291 #if SASL_VERSION_MAJOR >= 2
 292 static int
 293 slap_sasl_checkpass(
 294         sasl_conn_t *sconn,
 295         void *context,
 296         const char *username,
 297         const char *pass,
 298         unsigned passlen,
 299         struct propctx *propctx)
 300 {
 301         Connection *conn = (Connection *)context;
 302         struct berval dn, cred;
 303         int rc;
 304         BerVarray vals, bv;
 305
 306         cred.bv_val = (char *)pass;
 307         cred.bv_len = passlen;
 308
 309         /* XXX do we need to check sasldb as well? */
 310
 311         /* XXX can we do both steps at once? */
 312         rc = slap_sasl_getdn( conn, (char *)username, NULL, &dn,
 313                 FLAG_GETDN_AUTHCID | FLAG_GETDN_FINAL );
 314         if ( rc != LDAP_SUCCESS ) {
 315                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 316                 return SASL_NOUSER;
 317         }
 318
 319         if ( dn.bv_len == 0 ) {
 320                 sasl_seterror( sconn, 0,
 321                         "No password is associated with the Root DSE" );
 322                 if ( dn.bv_val != NULL ) {
 323                         ch_free( dn.bv_val );
 324                 }
 325                 return SASL_NOUSER;
 326         }
 327
 328         rc = backend_attribute( NULL, NULL, NULL, NULL, &dn,
 329                 slap_schema.si_ad_userPassword, &vals);
 330         if ( rc != LDAP_SUCCESS ) {
 331                 ch_free( dn.bv_val );
 332                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 333                 return SASL_NOVERIFY;
 334         }
 335
 336         rc = SASL_NOVERIFY;
 337
 338         if ( vals != NULL ) {
 339                 for ( bv = vals; bv->bv_val != NULL; bv++ ) {
 340                         if ( !lutil_passwd( bv, &cred, NULL ) ) {
 341                                 rc = SASL_OK;
 342                                 break;
 343                         }
 344                 }
 345                 ber_bvarray_free( vals );
 346         }
 347
 348         if ( rc != SASL_OK ) {
 349                 sasl_seterror( sconn, 0,
 350                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 351         }
 352
 353         ch_free( dn.bv_val );
 354
 355         return rc;
 356 }
 357
 358 static int
 359 slap_sasl_canonicalize(
 360         sasl_conn_t *sconn,
 361         void *context,
 362         const char *in,
 363         unsigned inlen,
 364         unsigned flags,
 365         const char *user_realm,
 366         char *out,
 367         unsigned out_max,
 368         unsigned *out_len)
 369 {
 370         Connection *conn = (Connection *)context;
 371         struct berval dn;
 372         int rc;
 373
 374         *out_len = 0;
 375
 376 #ifdef NEW_LOGGING
 377         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 378                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 379                         conn ? conn->c_connid : -1,
 380                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 381                         in ? in : "<empty>" ));
 382 #else
 383         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 384                 "%s=\"%s\"\n",
 385                         conn ? conn->c_connid : -1,
 386                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 387                         in ? in : "<empty>" );
 388 #endif
 389
 390         if (flags == SASL_CU_AUTHID) {
 391                 rc = slap_sasl_getdn( conn, (char *)in, (char *)user_realm,
 392                         &dn, FLAG_GETDN_AUTHCID);
 393                 if ( rc != LDAP_SUCCESS ) {
 394                         sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 395                         return SASL_NOAUTHZ;
 396                 }
 397
 398                 if ( out_max < dn.bv_len ) {
 399                         return SASL_BUFOVER;
 400                 }
 401
 402                 AC_MEMCPY( out, dn.bv_val, dn.bv_len );
 403                 out[dn.bv_len] = '\0';
 404
 405                 *out_len = dn.bv_len;
 406
 407                 ch_free( dn.bv_val );
 408
 409         } else {
 410                 strcpy( out, in );
 411
 412                 *out_len = strlen( in );
 413         }
 414
 415 #ifdef NEW_LOGGING
 416         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 417                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 418                         conn ? conn->c_connid : -1,
 419                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 420                         out ));
 421 #else
 422         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 423                 "%s=\"%s\"\n",
 424                         conn ? conn->c_connid : -1,
 425                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 426                         out );
 427 #endif
 428
 429         return SASL_OK;
 430 }
 431
 432 static int
 433 slap_sasl_authorize(
 434         sasl_conn_t *sconn,
 435         void *context,
 436         const char *requested_user,
 437         unsigned rlen,
 438         const char *auth_identity,
 439         unsigned alen,
 440         const char *def_realm,
 441         unsigned urlen,
 442         struct propctx *propctx)
 443 {
 444         Connection *conn = (Connection *)context;
 445         struct berval authcDN, authzDN;
 446         int rc;
 447
 448         authcDN.bv_val = (char *)auth_identity;
 449         authcDN.bv_len = alen;
 450
 451         authzDN.bv_val = (char *)requested_user;
 452         authzDN.bv_len = rlen;
 453
 454 #ifdef NEW_LOGGING
 455         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 456                 "slap_sasl_authorize: conn %d authcDN=\"%s\" authzDN=\"%s\"\n",
 457                         conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val));
 458 #else
 459         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 460                 "authcDN=\"%s\" authzDN=\"%s\"\n",
 461                 conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val );
 462 #endif
 463
 464         rc = slap_sasl_authorized( &authcDN, &authzDN );
 465         if ( rc != LDAP_SUCCESS ) {
 466 #ifdef NEW_LOGGING
 467                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 468                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 469                            (long)(conn ? conn->c_connid : -1), rc ));
 470 #else
 471                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 472                         " authorization disallowed (%d)\n",
 473                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 474 #endif
 475
 476                 sasl_seterror( sconn, 0, "not authorized" );
 477                 return SASL_NOAUTHZ;
 478         }
 479
 480 #ifdef NEW_LOGGING
 481         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 482                    "slap_sasl_authorize: conn %d authorization allowed\n",
 483                    (long)(conn ? conn->c_connid : -1 ) ));
 484 #else
 485         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 486                 " authorization allowed\n",
 487                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 488 #endif
 489
 490         return SASL_OK;
 491 }
 492 #else
 493 static int
 494 slap_sasl_authorize(
 495         void *context,
 496         const char *authcid,
 497         const char *authzid,
 498         const char **user,
 499         const char **errstr)
 500 {
 501         struct berval authcDN, authzDN;
 502         int rc;
 503         Connection *conn = context;
 504         char *realm;
 505
 506         *user = NULL;
 507
 508 #ifdef NEW_LOGGING
 509         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 510                    "slap_sasl_authorize: conn %d         authcid=\"%s\" authzid=\"%s\"\n",
 511                    conn ? conn->c_connid : -1,
 512                    authcid ? authcid : "<empty>",
 513                    authzid ? authzid : "<empty>" ));
 514 #else
 515         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 516                 "authcid=\"%s\" authzid=\"%s\"\n",
 517                 (long) (conn ? conn->c_connid : -1),
 518                 authcid ? authcid : "<empty>",
 519                 authzid ? authzid : "<empty>" );
 520 #endif
 521
 522         /* Figure out how much data we have for the dn */
 523         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 524         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 525 #ifdef NEW_LOGGING
 526                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 527                         "slap_sasl_authorize: getprop(REALM) failed.\n" ));
 528 #else
 529                 Debug(LDAP_DEBUG_TRACE,
 530                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 531 #endif
 532                 *errstr = "Could not extract realm";
 533                 return SASL_NOAUTHZ;
 534         }
 535
 536         /* Convert the identities to DN's. If no authzid was given, client will
 537            be bound as the DN matching their username */
 538         rc = slap_sasl_getdn( conn, (char *)authcid, realm, &authcDN, FLAG_GETDN_AUTHCID );
 539         if( rc != LDAP_SUCCESS ) {
 540                 *errstr = ldap_err2string( rc );
 541                 return SASL_NOAUTHZ;
 542         }
 543         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 544 #ifdef NEW_LOGGING
 545                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 546                            "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 547                            conn ? conn->c_connid : -1, authcDN.bv_val ));
 548 #else
 549                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 550                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 551 #endif
 552
 553                 *user = authcDN.bv_val;
 554                 *errstr = NULL;
 555                 return SASL_OK;
 556         }
 557         rc = slap_sasl_getdn( conn, (char *)authzid, realm, &authzDN, FLAG_GETDN_AUTHZID );
 558         if( rc != LDAP_SUCCESS ) {
 559                 ch_free( authcDN.bv_val );
 560                 *errstr = ldap_err2string( rc );
 561                 return SASL_NOAUTHZ;
 562         }
 563
 564         rc = slap_sasl_authorized( &authcDN, &authzDN );
 565         if( rc ) {
 566 #ifdef NEW_LOGGING
 567                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 568                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 569                            (long)(conn ? conn->c_connid : -1), rc ));
 570 #else
 571                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 572                         " authorization disallowed (%d)\n",
 573                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 574 #endif
 575
 576                 *errstr = "not authorized";
 577                 ch_free( authcDN.bv_val );
 578                 ch_free( authzDN.bv_val );
 579                 return SASL_NOAUTHZ;
 580         }
 581
 582 #ifdef NEW_LOGGING
 583         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 584                    "slap_sasl_authorize: conn %d authorization allowed\n",
 585                    (long)(conn ? conn->c_connid : -1 ) ));
 586 #else
 587         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 588                 " authorization allowed\n",
 589                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 590 #endif
 591
 592
 593         ch_free( authcDN.bv_val );
 594         *user = authzDN.bv_val;
 595         *errstr = NULL;
 596         return SASL_OK;
 597 }
 598 #endif /* SASL_VERSION_MAJOR >= 2 */
 599
 600 static int
 601 slap_sasl_err2ldap( int saslerr )
 602 {
 603         int rc;
 604
 605         switch (saslerr) {
 606                 case SASL_CONTINUE:
 607                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 608                         break;
 609                 case SASL_FAIL:
 610                         rc = LDAP_OTHER;
 611                         break;
 612                 case SASL_NOMEM:
 613                         rc = LDAP_OTHER;
 614                         break;
 615                 case SASL_NOMECH:
 616                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 617                         break;
 618                 case SASL_BADAUTH:
 619                         rc = LDAP_INVALID_CREDENTIALS;
 620                         break;
 621                 case SASL_NOAUTHZ:
 622                         rc = LDAP_INSUFFICIENT_ACCESS;
 623                         break;
 624                 case SASL_TOOWEAK:
 625                 case SASL_ENCRYPT:
 626                         rc = LDAP_INAPPROPRIATE_AUTH;
 627                         break;
 628                 default:
 629                         rc = LDAP_OTHER;
 630                         break;
 631         }
 632
 633         return rc;
 634 }
 635 #endif
 636
 637
 638 int slap_sasl_init( void )
 639 {
 640 #ifdef HAVE_CYRUS_SASL
 641         int rc;
 642         static sasl_callback_t server_callbacks[] = {
 643                 { SASL_CB_LOG, &slap_sasl_log, NULL },
 644                 { SASL_CB_LIST_END, NULL, NULL }
 645         };
 646
 647         sasl_set_alloc(
 648                 ch_malloc,
 649                 ch_calloc,
 650                 ch_realloc,
 651                 ch_free );
 652
 653         sasl_set_mutex(
 654                 ldap_pvt_sasl_mutex_new,
 655                 ldap_pvt_sasl_mutex_lock,
 656                 ldap_pvt_sasl_mutex_unlock,
 657                 ldap_pvt_sasl_mutex_dispose );
 658
 659         /* should provide callbacks for logging */
 660         /* server name should be configurable */
 661         rc = sasl_server_init( server_callbacks, "slapd" );
 662
 663         if( rc != SASL_OK ) {
 664 #ifdef NEW_LOGGING
 665                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 666                            "slap_sasl_init: init failed.\n" ));
 667 #else
 668                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
 669                         0, 0, 0 );
 670 #endif
 671
 672                 return -1;
 673         }
 674
 675 #ifdef NEW_LOGGING
 676         LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 677                    "slap_sasl_init: initialized!\n"));
 678 #else
 679         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
 680                 0, 0, 0 );
 681 #endif
 682
 683
 684         /* default security properties */
 685         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
 686         sasl_secprops.max_ssf = INT_MAX;
 687         sasl_secprops.maxbufsize = 65536;
 688         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
 689 #endif
 690
 691         return 0;
 692 }
 693
 694 int slap_sasl_destroy( void )
 695 {
 696 #ifdef HAVE_CYRUS_SASL
 697         sasl_done();
 698 #endif
 699         free( global_host );
 700         global_host = NULL;
 701
 702         return 0;
 703 }
 704
 705 int slap_sasl_open( Connection *conn )
 706 {
 707         int cb, sc = LDAP_SUCCESS;
 708 #if SASL_VERSION_MAJOR >= 2
 709         char *ipremoteport = NULL, *iplocalport = NULL;
 710 #endif
 711
 712 #ifdef HAVE_CYRUS_SASL
 713         sasl_conn_t *ctx = NULL;
 714         sasl_callback_t *session_callbacks;
 715
 716         assert( conn->c_sasl_context == NULL );
 717         assert( conn->c_sasl_extra == NULL );
 718
 719         conn->c_sasl_layers = 0;
 720
 721         session_callbacks =
 722 #if SASL_VERSION_MAJOR >= 2
 723                 ch_calloc( 5, sizeof(sasl_callback_t));
 724 #else
 725                 ch_calloc( 3, sizeof(sasl_callback_t));
 726 #endif
 727         conn->c_sasl_extra = session_callbacks;
 728
 729         session_callbacks[cb=0].id = SASL_CB_LOG;
 730         session_callbacks[cb].proc = &slap_sasl_log;
 731         session_callbacks[cb++].context = conn;
 732
 733         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
 734         session_callbacks[cb].proc = &slap_sasl_authorize;
 735         session_callbacks[cb++].context = conn;
 736
 737 #if SASL_VERSION_MAJOR >= 2
 738         session_callbacks[cb].id = SASL_CB_CANON_USER;
 739         session_callbacks[cb].proc = &slap_sasl_canonicalize;
 740         session_callbacks[cb++].context = conn;
 741
 742         /* XXXX: this should be conditional */
 743         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
 744         session_callbacks[cb].proc = &slap_sasl_checkpass;
 745         session_callbacks[cb++].context = conn;
 746 #endif
 747
 748         session_callbacks[cb].id = SASL_CB_LIST_END;
 749         session_callbacks[cb].proc = NULL;
 750         session_callbacks[cb++].context = NULL;
 751
 752         if( global_host == NULL ) {
 753                 global_host = ldap_pvt_get_fqdn( NULL );
 754         }
 755
 756         /* create new SASL context */
 757 #if SASL_VERSION_MAJOR >= 2
 758         if ( conn->c_sock_name.bv_len != 0 &&
 759              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
 760                 char *p;
 761
 762                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
 763                 /* Convert IPv6 addresses to address;port syntax. */
 764                 p = strrchr( iplocalport, ' ' );
 765                 /* Convert IPv4 addresses to address;port syntax. */
 766                 if ( p == NULL ) p = strchr( iplocalport, ':' );
 767                 if ( p != NULL ) {
 768                         *p = ';';
 769                 }
 770         }
 771         if ( conn->c_peer_name.bv_len != 0 &&
 772              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
 773                 char *p;
 774
 775                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
 776                 /* Convert IPv6 addresses to address;port syntax. */
 777                 p = strrchr( ipremoteport, ' ' );
 778                 /* Convert IPv4 addresses to address;port syntax. */
 779                 if ( p == NULL ) p = strchr( ipremoteport, ':' );
 780                 if ( p != NULL ) {
 781                         *p = ';';
 782                 }
 783         }
 784         sc = sasl_server_new( "ldap", global_host, global_realm,
 785                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
 786         if ( iplocalport != NULL ) {
 787                 ch_free( iplocalport );
 788         }
 789         if ( ipremoteport != NULL ) {
 790                 ch_free( ipremoteport );
 791         }
 792 #else
 793         sc = sasl_server_new( "ldap", global_host, global_realm,
 794                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
 795 #endif
 796
 797         if( sc != SASL_OK ) {
 798 #ifdef NEW_LOGGING
 799                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 800                            "slap_sasl_open: sasl_server_new failed: %d\n", sc ));
 801 #else
 802                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
 803                         sc, 0, 0 );
 804 #endif
 805
 806                 return -1;
 807         }
 808
 809         conn->c_sasl_context = ctx;
 810
 811         if( sc == SASL_OK ) {
 812                 sc = sasl_setprop( ctx,
 813                         SASL_SEC_PROPS, &sasl_secprops );
 814
 815                 if( sc != SASL_OK ) {
 816 #ifdef NEW_LOGGING
 817                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 818                                    "slap_sasl_open: sasl_setprop failed: %d \n", sc ));
 819 #else
 820                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
 821                                 sc, 0, 0 );
 822 #endif
 823
 824                         slap_sasl_close( conn );
 825                         return -1;
 826                 }
 827         }
 828
 829         sc = slap_sasl_err2ldap( sc );
 830 #endif
 831         return sc;
 832 }
 833
 834 int slap_sasl_external(
 835         Connection *conn,
 836         slap_ssf_t ssf,
 837         const char *auth_id )
 838 {
 839 #if SASL_VERSION_MAJOR >= 2
 840         int sc;
 841         sasl_conn_t *ctx = conn->c_sasl_context;
 842
 843         if ( ctx == NULL ) {
 844                 return LDAP_UNAVAILABLE;
 845         }
 846
 847         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 848
 849         if ( sc != SASL_OK ) {
 850                 return LDAP_OTHER;
 851         }
 852
 853         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
 854
 855         if ( sc != SASL_OK ) {
 856                 return LDAP_OTHER;
 857         }
 858
 859 #elif defined(HAVE_CYRUS_SASL)
 860         int sc;
 861         sasl_conn_t *ctx = conn->c_sasl_context;
 862         sasl_external_properties_t extprops;
 863
 864         if ( ctx == NULL ) {
 865                 return LDAP_UNAVAILABLE;
 866         }
 867
 868         memset( &extprops, '\0', sizeof(extprops) );
 869         extprops.ssf = ssf;
 870         extprops.auth_id = (char *) auth_id;
 871
 872         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 873                 (void *) &extprops );
 874
 875         if ( sc != SASL_OK ) {
 876                 return LDAP_OTHER;
 877         }
 878 #endif
 879
 880         return LDAP_SUCCESS;
 881 }
 882
 883 int slap_sasl_reset( Connection *conn )
 884 {
 885 #ifdef HAVE_CYRUS_SASL
 886         sasl_conn_t *ctx = conn->c_sasl_context;
 887
 888         if( ctx != NULL ) {
 889         }
 890 #endif
 891         /* must return "anonymous" */
 892         return LDAP_SUCCESS;
 893 }
 894
 895 char ** slap_sasl_mechs( Connection *conn )
 896 {
 897         char **mechs = NULL;
 898
 899 #ifdef HAVE_CYRUS_SASL
 900         sasl_conn_t *ctx = conn->c_sasl_context;
 901
 902         if( ctx != NULL ) {
 903                 int sc;
 904                 SASL_CONST char *mechstr;
 905
 906                 sc = sasl_listmech( ctx,
 907                         NULL, NULL, ",", NULL,
 908                         &mechstr, NULL, NULL );
 909
 910                 if( sc != SASL_OK ) {
 911 #ifdef NEW_LOGGING
 912                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 913                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
 914 #else
 915                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
 916                                 sc, 0, 0 );
 917 #endif
 918
 919                         return NULL;
 920                 }
 921
 922                 mechs = str2charray( mechstr, "," );
 923
 924 #if SASL_VERSION_MAJOR < 2
 925                 ch_free( mechstr );
 926 #endif
 927         }
 928 #endif
 929
 930         return mechs;
 931 }
 932
 933 int slap_sasl_close( Connection *conn )
 934 {
 935 #ifdef HAVE_CYRUS_SASL
 936         sasl_conn_t *ctx = conn->c_sasl_context;
 937
 938         if( ctx != NULL ) {
 939                 sasl_dispose( &ctx );
 940         }
 941
 942         conn->c_sasl_context = NULL;
 943
 944         free( conn->c_sasl_extra );
 945         conn->c_sasl_extra = NULL;
 946 #endif
 947
 948         return LDAP_SUCCESS;
 949 }
 950
 951 int slap_sasl_bind(
 952     Connection          *conn,
 953     Operation           *op,
 954     struct berval       *dn,
 955     struct berval       *ndn,
 956     struct berval       *cred,
 957         struct berval                   *edn,
 958         slap_ssf_t              *ssfp )
 959 {
 960         int rc = 1;
 961
 962 #ifdef HAVE_CYRUS_SASL
 963         sasl_conn_t *ctx = conn->c_sasl_context;
 964         struct berval response;
 965         unsigned reslen = 0;
 966         const char *errstr = NULL;
 967         int sc;
 968
 969 #ifdef NEW_LOGGING
 970         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 971                 "sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
 972                 conn->c_connid,
 973                 dn->bv_len ? dn->bv_val : "",
 974                 conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech.bv_val,
 975                 cred ? cred->bv_len : 0 ));
 976 #else
 977         Debug(LDAP_DEBUG_ARGS,
 978                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
 979                 dn->bv_len ? dn->bv_val : "",
 980                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
 981                 cred ? cred->bv_len : 0 );
 982 #endif
 983
 984
 985         if( ctx == NULL ) {
 986                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
 987                         NULL, "SASL unavailable on this session", NULL, NULL );
 988                 return rc;
 989         }
 990
 991 #if SASL_VERSION_MAJOR >= 2
 992 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 993         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
 994 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 995         sasl_server_step( ctx, cred, clen, resp, rlen )
 996 #else
 997 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 998         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
 999 #define STEP( ctx, cred, clen, resp, rlen, err ) \
1000         sasl_server_step( ctx, cred, clen, resp, rlen, err )
1001 #endif
1002
1003         if ( !conn->c_sasl_bind_in_progress ) {
1004                 sc = START( ctx,
1005                         conn->c_sasl_bind_mech.bv_val,
1006                         cred->bv_len ? cred->bv_val : "",
1007                         cred->bv_len,
1008                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1009
1010         } else {
1011                 sc = STEP( ctx,
1012                         cred->bv_val, cred->bv_len,
1013                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1014         }
1015
1016         response.bv_len = reslen;
1017
1018         if ( sc == SASL_OK ) {
1019                 char *username = NULL;
1020                 char *realm = NULL;
1021
1022 #if SASL_VERSION_MAJOR >= 2
1023                 sc = sasl_getprop( ctx, SASL_DEFUSERREALM, (const void **)&realm );
1024 #else
1025                 sc = sasl_getprop( ctx, SASL_REALM, (void **)&realm );
1026 #endif
1027                 sc = sasl_getprop( ctx,
1028                         SASL_USERNAME, (SASL_CONST void **)&username );
1029
1030                 if ( sc != SASL_OK ) {
1031 #ifdef NEW_LOGGING
1032                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1033                                 "slap_sasl_bind: getprop(USERNAME) failed: %d\n", sc ));
1034 #else
1035                         Debug(LDAP_DEBUG_TRACE,
1036                                 "slap_sasl_bind: getprop(USERNAME) failed!\n",
1037                                 0, 0, 0);
1038 #endif
1039
1040
1041                         send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1042                                 NULL, "no SASL username", NULL, NULL );
1043
1044                 } else {
1045                         rc = slap_sasl_getdn( conn, username, realm, edn, FLAG_GETDN_FINAL );
1046
1047                         if( rc == LDAP_SUCCESS ) {
1048                                 sasl_ssf_t *ssf = NULL;
1049                                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1050                                 *ssfp = ssf ? *ssf : 0;
1051
1052                                 if( *ssfp ) {
1053                                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1054                                         conn->c_sasl_layers++;
1055                                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1056                                 }
1057
1058                                 send_ldap_sasl( conn, op, rc,
1059                                         NULL, NULL, NULL, NULL,
1060                                         response.bv_len ? &response : NULL );
1061
1062                         } else {
1063                                 send_ldap_result( conn, op, rc,
1064                                         NULL, errstr, NULL, NULL );
1065                         }
1066                 }
1067
1068         } else if ( sc == SASL_CONTINUE ) {
1069                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1070                         NULL, NULL, NULL, NULL, &response );
1071
1072         } else {
1073                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1074                         NULL, errstr, NULL, NULL );
1075         }
1076
1077 #if SASL_VERSION_MAJOR < 2
1078         if( response.bv_len ) {
1079                 ch_free( response.bv_val );
1080         }
1081 #endif
1082
1083 #ifdef NEW_LOGGING
1084         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
1085                 "slap_sasl_bind: rc=%d\n", rc ));
1086 #else
1087         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1088 #endif
1089
1090
1091 #else
1092         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1093                 NULL, "SASL not supported", NULL, NULL );
1094 #endif
1095
1096         return rc;
1097 }
1098
1099 char* slap_sasl_secprops( const char *in )
1100 {
1101 #ifdef HAVE_CYRUS_SASL
1102         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1103
1104         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1105 #else
1106         return "SASL not supported";
1107 #endif
1108 }