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 #include <sasl.h>
  22
  23 #if SASL_VERSION_MAJOR >= 2
  24 #include <lutil.h>
  25 #define SASL_CONST const
  26 #else
  27 #define SASL_CONST
  28 #endif
  29
  30 #include <ldap_pvt.h>
  31
  32 #ifdef SLAPD_SPASSWD
  33 #include <lutil.h>
  34 #endif
  35
  36 /* Flags for telling slap_sasl_getdn() what type of identity is being passed */
  37 #define FLAG_GETDN_FINAL   1
  38 #define FLAG_GETDN_AUTHCID 2
  39 #define FLAG_GETDN_AUTHZID 4
  40
  41 static sasl_security_properties_t sasl_secprops;
  42
  43 static int
  44 slap_sasl_log(
  45         void *context,
  46         int priority,
  47         const char *message)
  48 {
  49         Connection *conn = context;
  50         int level;
  51         const char * label;
  52
  53         if ( message == NULL ) {
  54                 return SASL_BADPARAM;
  55         }
  56
  57         switch (priority) {
  58 #if SASL_VERSION_MAJOR >= 2
  59         case SASL_LOG_NONE:
  60                 level = LDAP_DEBUG_NONE;
  61                 label = "None";
  62                 break;
  63         case SASL_LOG_ERR:
  64                 level = LDAP_DEBUG_ANY;
  65                 label = "Error";
  66                 break;
  67         case SASL_LOG_FAIL:
  68                 level = LDAP_DEBUG_ANY;
  69                 label = "Failure";
  70                 break;
  71         case SASL_LOG_WARN:
  72                 level = LDAP_DEBUG_TRACE;
  73                 label = "Warning";
  74                 break;
  75         case SASL_LOG_NOTE:
  76                 level = LDAP_DEBUG_TRACE;
  77                 label = "Notice";
  78                 break;
  79         case SASL_LOG_DEBUG:
  80                 level = LDAP_DEBUG_TRACE;
  81                 label = "Debug";
  82                 break;
  83         case SASL_LOG_TRACE:
  84                 level = LDAP_DEBUG_TRACE;
  85                 label = "Trace";
  86                 break;
  87         case SASL_LOG_PASS:
  88                 level = LDAP_DEBUG_TRACE;
  89                 label = "Password Trace";
  90                 break;
  91 #else
  92         case SASL_LOG_ERR:
  93                 level = LDAP_DEBUG_ANY;
  94                 label = "Error";
  95                 break;
  96         case SASL_LOG_WARNING:
  97                 level = LDAP_DEBUG_TRACE;
  98                 label = "Warning";
  99                 break;
 100         case SASL_LOG_INFO:
 101                 level = LDAP_DEBUG_TRACE;
 102                 label = "Info";
 103                 break;
 104 #endif
 105         default:
 106                 return SASL_BADPARAM;
 107         }
 108
 109 #ifdef NEW_LOGGING
 110         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 111                 "SASL [conn=%ld] %s: %s\n",
 112                 conn ? conn->c_connid : -1,
 113                 label, message ));
 114 #else
 115         Debug( level, "SASL [conn=%ld] %s: %s\n",
 116                 conn ? conn->c_connid: -1,
 117                 label, message );
 118 #endif
 119
 120
 121         return SASL_OK;
 122 }
 123
 124
 125 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
 126    string returned in *dn is in its own allocated memory, and must be free'd
 127    by the calling process.
 128    -Mark Adamson, Carnegie Mellon
 129 */
 130
 131 #define SET_DN  1
 132 #define SET_U   2
 133
 134 static struct berval ext_bv = { sizeof("EXTERNAL")-1, "EXTERNAL" };
 135
 136 int slap_sasl_getdn( Connection *conn, char *id, char *user_realm, struct berval *dn, int flags )
 137 {
 138         char *c1;
 139         int rc, len, is_dn = 0;
 140         sasl_conn_t *ctx;
 141         struct berval dn2;
 142
 143 #ifdef NEW_LOGGING
 144         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 145                 "slap_sasl_getdn: conn %d id=%s\n",
 146                 conn ? conn->c_connid : -1,
 147                 id ? (*id ? id : "<empty>") : "NULL" ));
 148 #else
 149         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
 150       id?(*id?id:"<empty>"):"NULL",0,0 );
 151 #endif
 152
 153         dn->bv_val = NULL;
 154         dn->bv_len = 0;
 155
 156         /* Blatantly anonymous ID */
 157         if( id &&
 158                 ( id[sizeof( "anonymous" )-1] == '\0'
 159                         || id[sizeof( "anonymous" )-1] == '@' ) &&
 160                 !strncasecmp( id, "anonymous", sizeof( "anonymous" )-1) ) {
 161                 return( LDAP_SUCCESS );
 162         }
 163         ctx = conn->c_sasl_context;
 164         len = strlen( id );
 165
 166         /* An authcID needs to be converted to authzID form */
 167         if( flags & FLAG_GETDN_AUTHCID ) {
 168                 if( sasl_external_x509dn_convert
 169                         && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
 170                         && ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 )
 171                         && id[0] == '/' )
 172                 {
 173                         /* check SASL external for X.509 style DN and */
 174                         /* convert to dn:<dn> form */
 175                         dn->bv_val = ldap_dcedn2dn( id );
 176                         dn->bv_len = strlen(dn->bv_val);
 177                         is_dn = SET_DN;
 178
 179                 } else {
 180                         /* convert to u:<username> form */
 181                         ber_str2bv( id, len, 1, dn );
 182                         is_dn = SET_U;
 183                 }
 184         }
 185         if( !is_dn ) {
 186                 if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
 187                         is_dn = SET_U;
 188                         ber_str2bv( id+2, len-2, 1, dn );
 189                 } else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
 190                         is_dn = SET_DN;
 191                         ber_str2bv( id+3, len-3, 1, dn );
 192                 }
 193         }
 194
 195         /* An authzID must be properly prefixed */
 196         if( (flags & FLAG_GETDN_AUTHZID) && !is_dn ) {
 197                 free( dn->bv_val );
 198                 dn->bv_val = NULL;
 199                 dn->bv_len = 0;
 200                 return( LDAP_INAPPROPRIATE_AUTH );
 201         }
 202
 203         /* Username strings */
 204         if( is_dn == SET_U ) {
 205                 char *p;
 206                 len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
 207
 208                 if( user_realm && *user_realm ) {
 209                         len += strlen( user_realm ) + sizeof(",cn=")-1;
 210                 }
 211
 212                 if( conn->c_sasl_bind_mech.bv_len ) {
 213                         len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
 214                 }
 215
 216                 /* Build the new dn */
 217                 c1 = dn->bv_val;
 218                 dn->bv_val = ch_malloc( len );
 219                 p = slap_strcopy( dn->bv_val, "uid=" );
 220                 p = slap_strcopy( p, c1 );
 221                 ch_free( c1 );
 222
 223                 if( user_realm ) {
 224                         p = slap_strcopy( p, ",cn=" );
 225                         p = slap_strcopy( p, user_realm );
 226                 }
 227                 if( conn->c_sasl_bind_mech.bv_len ) {
 228                         p = slap_strcopy( p, ",cn=" );
 229                         p = slap_strcopy( p, conn->c_sasl_bind_mech.bv_val );
 230                 }
 231                 p = slap_strcopy( p, ",cn=auth" );
 232                 dn->bv_len = p - dn->bv_val;
 233                 is_dn = SET_DN;
 234
 235 #ifdef NEW_LOGGING
 236                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 237                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val ));
 238 #else
 239                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
 240 #endif
 241         }
 242
 243         /* DN strings that are a cn=auth identity to run through regexp */
 244         if( is_dn == SET_DN && ( ( flags & FLAG_GETDN_FINAL ) == 0 ) )
 245         {
 246                 slap_sasl2dn( dn, &dn2 );
 247                 if( dn2.bv_val ) {
 248                         ch_free( dn->bv_val );
 249                         *dn = dn2;
 250 #ifdef NEW_LOGGING
 251                         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 252                                 "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val ));
 253 #else
 254                         Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
 255                                 dn->bv_val, 0, 0 );
 256 #endif
 257                 }
 258         }
 259
 260         if( flags & FLAG_GETDN_FINAL ) {
 261                 /* omit "dn:" prefix */
 262                 is_dn = 0;
 263         } else {
 264                 rc = dnNormalize2( NULL, dn, &dn2 );
 265                 free(dn->bv_val);
 266                 if ( rc != LDAP_SUCCESS ) {
 267                         *dn = slap_empty_bv;
 268                         return rc;
 269                 }
 270                 *dn = dn2;
 271         }
 272
 273         /* Attach the "dn:" prefix if needed */
 274         if ( is_dn == SET_DN ) {
 275                 c1 = ch_malloc( dn->bv_len + sizeof("dn:") );
 276                 strcpy( c1, "dn:" );
 277                 strcpy( c1 + 3, dn->bv_val );
 278                 free( dn->bv_val );
 279                 dn->bv_val = c1;
 280                 dn->bv_len += 3;
 281         }
 282
 283         return( LDAP_SUCCESS );
 284 }
 285
 286 #if SASL_VERSION_MAJOR >= 2
 287 static int
 288 slap_sasl_checkpass(
 289         sasl_conn_t *sconn,
 290         void *context,
 291         const char *username,
 292         const char *pass,
 293         unsigned passlen,
 294         struct propctx *propctx)
 295 {
 296         Connection *conn = (Connection *)context;
 297         struct berval dn, cred;
 298         int rc;
 299         BerVarray vals, bv;
 300
 301         cred.bv_val = (char *)pass;
 302         cred.bv_len = passlen;
 303
 304         /* XXX can we do both steps at once? */
 305         rc = slap_sasl_getdn( conn, (char *)username, NULL, &dn,
 306                 FLAG_GETDN_AUTHCID | FLAG_GETDN_FINAL );
 307         if ( rc != LDAP_SUCCESS ) {
 308                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 309                 return SASL_NOUSER;
 310         }
 311
 312         if ( dn.bv_len == 0 ) {
 313                 sasl_seterror( sconn, 0, "No password is associated with the Root DSE" );
 314                 if ( dn.bv_val != NULL ) {
 315                         ch_free( dn.bv_val );
 316                 }
 317                 return SASL_NOUSER;
 318         }
 319
 320         rc = backend_attribute( NULL, NULL, NULL, NULL, &dn,
 321                 slap_schema.si_ad_userPassword, &vals);
 322         if ( rc != LDAP_SUCCESS ) {
 323                 ch_free( dn.bv_val );
 324                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 325                 return SASL_NOVERIFY;
 326         }
 327
 328         rc = SASL_NOVERIFY;
 329
 330         if ( vals != NULL ) {
 331                 for ( bv = vals; bv->bv_val != NULL; bv++ ) {
 332                         if ( !lutil_passwd( bv, &cred, NULL ) ) {
 333                                 rc = SASL_OK;
 334                                 break;
 335                         }
 336                 }
 337                 ber_bvarray_free( vals );
 338         }
 339
 340         if ( rc != SASL_OK ) {
 341                 sasl_seterror( sconn, 0,
 342                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 343         }
 344
 345         ch_free( dn.bv_val );
 346
 347         return rc;
 348 }
 349
 350 static int
 351 slap_sasl_canonicalize(
 352         sasl_conn_t *sconn,
 353         void *context,
 354         const char *in,
 355         unsigned inlen,
 356         unsigned flags,
 357         const char *user_realm,
 358         char *out,
 359         unsigned out_max,
 360         unsigned *out_len)
 361 {
 362         Connection *conn = (Connection *)context;
 363         struct berval dn;
 364         int rc;
 365
 366         *out_len = 0;
 367
 368 #ifdef NEW_LOGGING
 369         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 370                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 371                         conn ? conn->c_connid : -1,
 372                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 373                         in ? in : "<empty>" ));
 374 #else
 375         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 376                 "%s=\"%s\"\n",
 377                         conn ? conn->c_connid : -1,
 378                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 379                         in ? in : "<empty>" );
 380 #endif
 381
 382         rc = slap_sasl_getdn( conn, (char *)in, (char *)user_realm, &dn,
 383                 (flags == SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
 384         if ( rc != LDAP_SUCCESS ) {
 385                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 386                 return SASL_NOAUTHZ;
 387         }
 388
 389         if ( out_max < dn.bv_len ) {
 390                 return SASL_BUFOVER;
 391         }
 392
 393         AC_MEMCPY( out, dn.bv_val, dn.bv_len );
 394         out[dn.bv_len] = '\0';
 395
 396         *out_len = dn.bv_len;
 397
 398         ch_free( dn.bv_val );
 399
 400 #ifdef NEW_LOGGING
 401         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 402                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 403                         conn ? conn->c_connid : -1,
 404                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 405                         out ));
 406 #else
 407         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 408                 "%s=\"%s\"\n",
 409                         conn ? conn->c_connid : -1,
 410                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 411                         out );
 412 #endif
 413
 414         return SASL_OK;
 415 }
 416
 417 static int
 418 slap_sasl_authorize(
 419         sasl_conn_t *sconn,
 420         void *context,
 421         const char *requested_user,
 422         unsigned rlen,
 423         const char *auth_identity,
 424         unsigned alen,
 425         const char *def_realm,
 426         unsigned urlen,
 427         struct propctx *propctx)
 428 {
 429         Connection *conn = (Connection *)context;
 430         struct berval authcDN, authzDN;
 431         int rc;
 432
 433         authcDN.bv_val = (char *)auth_identity;
 434         authcDN.bv_len = alen;
 435
 436         authzDN.bv_val = (char *)requested_user;
 437         authzDN.bv_len = rlen;
 438
 439 #ifdef NEW_LOGGING
 440         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 441                 "slap_sasl_authorize: conn %d authcDN=\"%s\" authzDN=\"%s\"\n",
 442                         conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val));
 443 #else
 444         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 445                 "authcDN=\"%s\" authzDN=\"%s\"\n",
 446                 conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val );
 447 #endif
 448
 449         rc = slap_sasl_authorized( &authcDN, &authzDN );
 450         if ( rc != LDAP_SUCCESS ) {
 451 #ifdef NEW_LOGGING
 452                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 453                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 454                            (long)(conn ? conn->c_connid : -1), rc ));
 455 #else
 456                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 457                         " authorization disallowed (%d)\n",
 458                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 459 #endif
 460
 461                 sasl_seterror( sconn, 0, "not authorized" );
 462                 return SASL_NOAUTHZ;
 463         }
 464
 465 #ifdef NEW_LOGGING
 466         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 467                    "slap_sasl_authorize: conn %d authorization allowed\n",
 468                    (long)(conn ? conn->c_connid : -1 ) ));
 469 #else
 470         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 471                 " authorization allowed\n",
 472                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 473 #endif
 474
 475         return SASL_OK;
 476 }
 477 #else
 478 static int
 479 slap_sasl_authorize(
 480         void *context,
 481         const char *authcid,
 482         const char *authzid,
 483         const char **user,
 484         const char **errstr)
 485 {
 486         struct berval authcDN, authzDN;
 487         int rc;
 488         Connection *conn = context;
 489         char *realm;
 490
 491         *user = NULL;
 492
 493 #ifdef NEW_LOGGING
 494         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 495                    "slap_sasl_authorize: conn %d         authcid=\"%s\" authzid=\"%s\"\n",
 496                    conn ? conn->c_connid : -1,
 497                    authcid ? authcid : "<empty>",
 498                    authzid ? authzid : "<empty>" ));
 499 #else
 500         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 501                 "authcid=\"%s\" authzid=\"%s\"\n",
 502                 (long) (conn ? conn->c_connid : -1),
 503                 authcid ? authcid : "<empty>",
 504                 authzid ? authzid : "<empty>" );
 505 #endif
 506
 507         /* Convert the identities to DN's. If no authzid was given, client will
 508            be bound as the DN matching their username */
 509         rc = slap_sasl_getdn( conn, (char *)authcid, realm, &authcDN, FLAG_GETDN_AUTHCID );
 510         if( rc != LDAP_SUCCESS ) {
 511                 *errstr = ldap_err2string( rc );
 512                 return SASL_NOAUTHZ;
 513         }
 514         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 515 #ifdef NEW_LOGGING
 516                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 517                            "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 518                            conn ? conn->c_connid : -1, authcDN.bv_val ));
 519 #else
 520                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 521                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 522 #endif
 523
 524                 *user = authcDN.bv_val;
 525                 *errstr = NULL;
 526                 return SASL_OK;
 527         }
 528         rc = slap_sasl_getdn( conn, (char *)authzid, realm, &authzDN, FLAG_GETDN_AUTHZID );
 529         if( rc != LDAP_SUCCESS ) {
 530                 ch_free( authcDN.bv_val );
 531                 *errstr = ldap_err2string( rc );
 532                 return SASL_NOAUTHZ;
 533         }
 534
 535         rc = slap_sasl_authorized( &authcDN, &authzDN );
 536         if( rc ) {
 537 #ifdef NEW_LOGGING
 538                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 539                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 540                            (long)(conn ? conn->c_connid : -1), rc ));
 541 #else
 542                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 543                         " authorization disallowed (%d)\n",
 544                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 545 #endif
 546
 547                 *errstr = "not authorized";
 548                 ch_free( authcDN.bv_val );
 549                 ch_free( authzDN.bv_val );
 550                 return SASL_NOAUTHZ;
 551         }
 552
 553 #ifdef NEW_LOGGING
 554         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 555                    "slap_sasl_authorize: conn %d authorization allowed\n",
 556                    (long)(conn ? conn->c_connid : -1 ) ));
 557 #else
 558         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 559                 " authorization allowed\n",
 560                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 561 #endif
 562
 563
 564         ch_free( authcDN.bv_val );
 565         *user = authzDN.bv_val;
 566         *errstr = NULL;
 567         return SASL_OK;
 568 }
 569 #endif /* SASL_VERSION_MAJOR >= 2 */
 570
 571 static int
 572 slap_sasl_err2ldap( int saslerr )
 573 {
 574         int rc;
 575
 576         switch (saslerr) {
 577                 case SASL_CONTINUE:
 578                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 579                         break;
 580                 case SASL_FAIL:
 581                         rc = LDAP_OTHER;
 582                         break;
 583                 case SASL_NOMEM:
 584                         rc = LDAP_OTHER;
 585                         break;
 586                 case SASL_NOMECH:
 587                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 588                         break;
 589                 case SASL_BADAUTH:
 590                         rc = LDAP_INVALID_CREDENTIALS;
 591                         break;
 592                 case SASL_NOAUTHZ:
 593                         rc = LDAP_INSUFFICIENT_ACCESS;
 594                         break;
 595                 case SASL_TOOWEAK:
 596                 case SASL_ENCRYPT:
 597                         rc = LDAP_INAPPROPRIATE_AUTH;
 598                         break;
 599                 default:
 600                         rc = LDAP_OTHER;
 601                         break;
 602         }
 603
 604         return rc;
 605 }
 606 #endif
 607
 608
 609 int slap_sasl_init( void )
 610 {
 611 #ifdef HAVE_CYRUS_SASL
 612         int rc;
 613         static sasl_callback_t server_callbacks[] = {
 614                 { SASL_CB_LOG, &slap_sasl_log, NULL },
 615                 { SASL_CB_LIST_END, NULL, NULL }
 616         };
 617
 618         sasl_set_alloc(
 619                 ch_malloc,
 620                 ch_calloc,
 621                 ch_realloc,
 622                 ch_free );
 623
 624         sasl_set_mutex(
 625                 ldap_pvt_sasl_mutex_new,
 626                 ldap_pvt_sasl_mutex_lock,
 627                 ldap_pvt_sasl_mutex_unlock,
 628                 ldap_pvt_sasl_mutex_dispose );
 629
 630         /* should provide callbacks for logging */
 631         /* server name should be configurable */
 632         rc = sasl_server_init( server_callbacks, "slapd" );
 633
 634         if( rc != SASL_OK ) {
 635 #ifdef NEW_LOGGING
 636                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 637                            "slap_sasl_init: init failed.\n" ));
 638 #else
 639                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
 640                         0, 0, 0 );
 641 #endif
 642
 643                 return -1;
 644         }
 645
 646 #ifdef NEW_LOGGING
 647         LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 648                    "slap_sasl_init: initialized!\n"));
 649 #else
 650         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
 651                 0, 0, 0 );
 652 #endif
 653
 654
 655         /* default security properties */
 656         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
 657         sasl_secprops.max_ssf = INT_MAX;
 658         sasl_secprops.maxbufsize = 65536;
 659         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
 660 #endif
 661
 662         return 0;
 663 }
 664
 665 int slap_sasl_destroy( void )
 666 {
 667 #ifdef HAVE_CYRUS_SASL
 668         sasl_done();
 669 #endif
 670         free( global_host );
 671         global_host = NULL;
 672
 673         return 0;
 674 }
 675
 676 int slap_sasl_open( Connection *conn )
 677 {
 678         int sc = LDAP_SUCCESS;
 679 #if SASL_VERSION_MAJOR >= 2
 680         char *ipremoteport = NULL, *iplocalport = NULL;
 681 #endif
 682
 683 #ifdef HAVE_CYRUS_SASL
 684         sasl_conn_t *ctx = NULL;
 685         sasl_callback_t *session_callbacks;
 686
 687         assert( conn->c_sasl_context == NULL );
 688         assert( conn->c_sasl_extra == NULL );
 689
 690         conn->c_sasl_layers = 0;
 691
 692         session_callbacks =
 693 #if SASL_VERSION_MAJOR >= 2
 694                 ch_calloc( 5, sizeof(sasl_callback_t));
 695 #else
 696                 ch_calloc( 3, sizeof(sasl_callback_t));
 697 #endif
 698         conn->c_sasl_extra = session_callbacks;
 699
 700         session_callbacks[0].id = SASL_CB_LOG;
 701         session_callbacks[0].proc = &slap_sasl_log;
 702         session_callbacks[0].context = conn;
 703
 704         session_callbacks[1].id = SASL_CB_PROXY_POLICY;
 705         session_callbacks[1].proc = &slap_sasl_authorize;
 706         session_callbacks[1].context = conn;
 707
 708 #if SASL_VERSION_MAJOR >= 2
 709         session_callbacks[2].id = SASL_CB_CANON_USER;
 710         session_callbacks[2].proc = &slap_sasl_canonicalize;
 711         session_callbacks[2].context = conn;
 712
 713         session_callbacks[3].id = SASL_CB_SERVER_USERDB_CHECKPASS;
 714         session_callbacks[3].proc = &slap_sasl_checkpass;
 715         session_callbacks[3].context = conn;
 716
 717         session_callbacks[4].id = SASL_CB_LIST_END;
 718         session_callbacks[4].proc = NULL;
 719         session_callbacks[4].context = NULL;
 720 #else
 721         session_callbacks[2].id = SASL_CB_LIST_END;
 722         session_callbacks[2].proc = NULL;
 723         session_callbacks[2].context = NULL;
 724 #endif
 725
 726         if( global_host == NULL ) {
 727                 global_host = ldap_pvt_get_fqdn( NULL );
 728         }
 729
 730         /* create new SASL context */
 731 #if SASL_VERSION_MAJOR >= 2
 732         if ( conn->c_sock_name.bv_len != 0 &&
 733              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
 734                 char *p;
 735
 736                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
 737                 /* Convert IPv6 addresses to address;port syntax. */
 738                 p = strrchr( iplocalport, ' ' );
 739                 if ( p != NULL ) {
 740                         *p = ';';
 741                 }
 742         }
 743         if ( conn->c_peer_name.bv_len != 0 &&
 744              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
 745                 char *p;
 746
 747                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
 748                 /* Convert IPv6 addresses to address;port syntax. */
 749                 p = strrchr( ipremoteport, ' ' );
 750                 if ( p != NULL ) {
 751                         *p = ';';
 752                 }
 753         }
 754         sc = sasl_server_new( "ldap", global_host, global_realm,
 755                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
 756         if ( iplocalport != NULL ) {
 757                 ch_free( iplocalport );
 758         }
 759         if ( ipremoteport != NULL ) {
 760                 ch_free( ipremoteport );
 761         }
 762 #else
 763         sc = sasl_server_new( "ldap", global_host, global_realm,
 764                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
 765 #endif
 766
 767         if( sc != SASL_OK ) {
 768 #ifdef NEW_LOGGING
 769                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 770                            "slap_sasl_open: sasl_server_new failed: %d\n", sc ));
 771 #else
 772                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
 773                         sc, 0, 0 );
 774 #endif
 775
 776                 return -1;
 777         }
 778
 779         conn->c_sasl_context = ctx;
 780
 781         if( sc == SASL_OK ) {
 782                 sc = sasl_setprop( ctx,
 783                         SASL_SEC_PROPS, &sasl_secprops );
 784
 785                 if( sc != SASL_OK ) {
 786 #ifdef NEW_LOGGING
 787                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 788                                    "slap_sasl_open: sasl_setprop failed: %d \n", sc ));
 789 #else
 790                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
 791                                 sc, 0, 0 );
 792 #endif
 793
 794                         slap_sasl_close( conn );
 795                         return -1;
 796                 }
 797         }
 798
 799         sc = slap_sasl_err2ldap( sc );
 800 #endif
 801         return sc;
 802 }
 803
 804 int slap_sasl_external(
 805         Connection *conn,
 806         slap_ssf_t ssf,
 807         const char *auth_id )
 808 {
 809 #if SASL_VERSION_MAJOR >= 2
 810         int sc;
 811         sasl_conn_t *ctx = conn->c_sasl_context;
 812
 813         if ( ctx == NULL ) {
 814                 return LDAP_UNAVAILABLE;
 815         }
 816
 817         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 818
 819         if ( sc != SASL_OK ) {
 820                 return LDAP_OTHER;
 821         }
 822
 823         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
 824
 825         if ( sc != SASL_OK ) {
 826                 return LDAP_OTHER;
 827         }
 828 #elif defined(HAVE_CYRUS_SASL)
 829         int sc;
 830         sasl_conn_t *ctx = conn->c_sasl_context;
 831         sasl_external_properties_t extprops;
 832
 833         if ( ctx == NULL ) {
 834                 return LDAP_UNAVAILABLE;
 835         }
 836
 837         memset( &extprops, '\0', sizeof(extprops) );
 838         extprops.ssf = ssf;
 839         extprops.auth_id = (char *) auth_id;
 840
 841         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 842                 (void *) &extprops );
 843
 844         if ( sc != SASL_OK ) {
 845                 return LDAP_OTHER;
 846         }
 847 #endif
 848
 849         return LDAP_SUCCESS;
 850 }
 851
 852 int slap_sasl_reset( Connection *conn )
 853 {
 854 #ifdef HAVE_CYRUS_SASL
 855         sasl_conn_t *ctx = conn->c_sasl_context;
 856
 857         if( ctx != NULL ) {
 858         }
 859 #endif
 860         /* must return "anonymous" */
 861         return LDAP_SUCCESS;
 862 }
 863
 864 char ** slap_sasl_mechs( Connection *conn )
 865 {
 866         char **mechs = NULL;
 867
 868 #ifdef HAVE_CYRUS_SASL
 869         sasl_conn_t *ctx = conn->c_sasl_context;
 870
 871         if( ctx != NULL ) {
 872                 int sc;
 873                 SASL_CONST char *mechstr;
 874
 875                 sc = sasl_listmech( ctx,
 876                         NULL, NULL, ",", NULL,
 877                         &mechstr, NULL, NULL );
 878
 879                 if( sc != SASL_OK ) {
 880 #ifdef NEW_LOGGING
 881                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 882                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
 883 #else
 884                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
 885                                 sc, 0, 0 );
 886 #endif
 887
 888                         return NULL;
 889                 }
 890
 891                 mechs = str2charray( mechstr, "," );
 892
 893 #if SASL_VERSION_MAJOR < 2
 894                 ch_free( mechstr );
 895 #endif
 896         }
 897 #endif
 898
 899         return mechs;
 900 }
 901
 902 int slap_sasl_close( Connection *conn )
 903 {
 904 #ifdef HAVE_CYRUS_SASL
 905         sasl_conn_t *ctx = conn->c_sasl_context;
 906
 907         if( ctx != NULL ) {
 908                 sasl_dispose( &ctx );
 909         }
 910
 911         conn->c_sasl_context = NULL;
 912
 913         free( conn->c_sasl_extra );
 914         conn->c_sasl_extra = NULL;
 915 #endif
 916
 917         return LDAP_SUCCESS;
 918 }
 919
 920 int slap_sasl_bind(
 921     Connection          *conn,
 922     Operation           *op,
 923     struct berval       *dn,
 924     struct berval       *ndn,
 925     struct berval       *cred,
 926         struct berval                   *edn,
 927         slap_ssf_t              *ssfp )
 928 {
 929         int rc = 1;
 930
 931 #ifdef HAVE_CYRUS_SASL
 932         sasl_conn_t *ctx = conn->c_sasl_context;
 933         struct berval response;
 934         unsigned reslen = 0;
 935         const char *errstr = NULL;
 936         int sc;
 937
 938 #ifdef NEW_LOGGING
 939         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 940                 "sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
 941                 conn->c_connid,
 942                 dn->bv_len ? dn->bv_val : "",
 943                 conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech.bv_val,
 944                 cred ? cred->bv_len : 0 ));
 945 #else
 946         Debug(LDAP_DEBUG_ARGS,
 947                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
 948                 dn->bv_len ? dn->bv_val : "",
 949                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
 950                 cred ? cred->bv_len : 0 );
 951 #endif
 952
 953
 954         if( ctx == NULL ) {
 955                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
 956                         NULL, "SASL unavailable on this session", NULL, NULL );
 957                 return rc;
 958         }
 959
 960 #if SASL_VERSION_MAJOR >= 2
 961 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 962         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
 963 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 964         sasl_server_step( ctx, cred, clen, resp, rlen )
 965 #else
 966 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 967         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
 968 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 969         sasl_server_step( ctx, cred, clen, resp, rlen, err )
 970 #endif
 971
 972         if ( !conn->c_sasl_bind_in_progress ) {
 973                 sc = START( ctx,
 974                         conn->c_sasl_bind_mech.bv_val,
 975                         cred->bv_len ? cred->bv_val : "",
 976                         cred->bv_len,
 977                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
 978
 979         } else {
 980                 sc = STEP( ctx,
 981                         cred->bv_val, cred->bv_len,
 982                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
 983         }
 984
 985         response.bv_len = reslen;
 986
 987         if ( sc == SASL_OK ) {
 988                 char *username = NULL;
 989                 char *realm = NULL;
 990
 991 #if SASL_VERSION_MAJOR >= 2
 992                 sc = sasl_getprop( ctx, SASL_DEFUSERREALM, (const void **)&realm );
 993 #else
 994                 sc = sasl_getprop( ctx, SASL_REALM, (void **)&realm );
 995 #endif
 996                 sc = sasl_getprop( ctx,
 997                         SASL_USERNAME, (SASL_CONST void **)&username );
 998
 999                 if ( sc != SASL_OK ) {
1000 #ifdef NEW_LOGGING
1001                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1002                                 "slap_sasl_bind: getprop(USERNAME) failed: %d\n", sc ));
1003 #else
1004                         Debug(LDAP_DEBUG_TRACE,
1005                                 "slap_sasl_bind: getprop(USERNAME) failed!\n",
1006                                 0, 0, 0);
1007 #endif
1008
1009
1010                         send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1011                                 NULL, "no SASL username", NULL, NULL );
1012
1013                 } else {
1014                         rc = slap_sasl_getdn( conn, username, realm, edn, FLAG_GETDN_FINAL );
1015
1016                         if( rc == LDAP_SUCCESS ) {
1017                                 sasl_ssf_t *ssf = NULL;
1018                                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1019                                 *ssfp = ssf ? *ssf : 0;
1020
1021                                 if( *ssfp ) {
1022                                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1023                                         conn->c_sasl_layers++;
1024                                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1025                                 }
1026
1027                                 send_ldap_sasl( conn, op, rc,
1028                                         NULL, NULL, NULL, NULL,
1029                                         response.bv_len ? &response : NULL );
1030
1031                         } else {
1032                                 send_ldap_result( conn, op, rc,
1033                                         NULL, errstr, NULL, NULL );
1034                         }
1035                 }
1036
1037         } else if ( sc == SASL_CONTINUE ) {
1038                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1039                         NULL, NULL, NULL, NULL, &response );
1040
1041         } else {
1042                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1043                         NULL, errstr, NULL, NULL );
1044         }
1045
1046 #if SASL_VERSION_MAJOR < 2
1047         if( response.bv_len ) {
1048                 ch_free( response.bv_val );
1049         }
1050 #endif
1051
1052 #ifdef NEW_LOGGING
1053         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
1054                 "slap_sasl_bind: rc=%d\n", rc ));
1055 #else
1056         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1057 #endif
1058
1059
1060 #else
1061         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1062                 NULL, "SASL not supported", NULL, NULL );
1063 #endif
1064
1065         return rc;
1066 }
1067
1068 char* slap_sasl_secprops( const char *in )
1069 {
1070 #ifdef HAVE_CYRUS_SASL
1071         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1072
1073         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1074 #else
1075         return "SASL not supported";
1076 #endif
1077 }