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 );
 224                 p = slap_strcopy( dn->bv_val, "uid=" );
 225                 p = slap_strcopy( p, c1 );
 226                 ch_free( c1 );
 227
 228                 if( 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 can we do both steps at once? */
 310         rc = slap_sasl_getdn( conn, (char *)username, NULL, &dn,
 311                 FLAG_GETDN_AUTHCID | FLAG_GETDN_FINAL );
 312         if ( rc != LDAP_SUCCESS ) {
 313                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 314                 return SASL_NOUSER;
 315         }
 316
 317         if ( dn.bv_len == 0 ) {
 318                 sasl_seterror( sconn, 0,
 319                         "No password is associated with the Root DSE" );
 320                 if ( dn.bv_val != NULL ) {
 321                         ch_free( dn.bv_val );
 322                 }
 323                 return SASL_NOUSER;
 324         }
 325
 326         rc = backend_attribute( NULL, NULL, NULL, NULL, &dn,
 327                 slap_schema.si_ad_userPassword, &vals);
 328         if ( rc != LDAP_SUCCESS ) {
 329                 ch_free( dn.bv_val );
 330                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 331                 return SASL_NOVERIFY;
 332         }
 333
 334         rc = SASL_NOVERIFY;
 335
 336         if ( vals != NULL ) {
 337                 for ( bv = vals; bv->bv_val != NULL; bv++ ) {
 338                         if ( !lutil_passwd( bv, &cred, NULL ) ) {
 339                                 rc = SASL_OK;
 340                                 break;
 341                         }
 342                 }
 343                 ber_bvarray_free( vals );
 344         }
 345
 346         if ( rc != SASL_OK ) {
 347                 sasl_seterror( sconn, 0,
 348                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 349         }
 350
 351         ch_free( dn.bv_val );
 352
 353         return rc;
 354 }
 355
 356 static int
 357 slap_sasl_canonicalize(
 358         sasl_conn_t *sconn,
 359         void *context,
 360         const char *in,
 361         unsigned inlen,
 362         unsigned flags,
 363         const char *user_realm,
 364         char *out,
 365         unsigned out_max,
 366         unsigned *out_len)
 367 {
 368         Connection *conn = (Connection *)context;
 369         struct berval dn;
 370         int rc;
 371
 372         *out_len = 0;
 373
 374 #ifdef NEW_LOGGING
 375         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 376                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 377                         conn ? conn->c_connid : -1,
 378                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 379                         in ? in : "<empty>" ));
 380 #else
 381         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 382                 "%s=\"%s\"\n",
 383                         conn ? conn->c_connid : -1,
 384                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 385                         in ? in : "<empty>" );
 386 #endif
 387
 388         rc = slap_sasl_getdn( conn, (char *)in, (char *)user_realm, &dn,
 389                 (flags == SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
 390         if ( rc != LDAP_SUCCESS ) {
 391                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 392                 return SASL_NOAUTHZ;
 393         }
 394
 395         if ( out_max < dn.bv_len ) {
 396                 return SASL_BUFOVER;
 397         }
 398
 399         AC_MEMCPY( out, dn.bv_val, dn.bv_len );
 400         out[dn.bv_len] = '\0';
 401
 402         *out_len = dn.bv_len;
 403
 404         ch_free( dn.bv_val );
 405
 406 #ifdef NEW_LOGGING
 407         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 408                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 409                         conn ? conn->c_connid : -1,
 410                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 411                         out ));
 412 #else
 413         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 414                 "%s=\"%s\"\n",
 415                         conn ? conn->c_connid : -1,
 416                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 417                         out );
 418 #endif
 419
 420         return SASL_OK;
 421 }
 422
 423 static int
 424 slap_sasl_authorize(
 425         sasl_conn_t *sconn,
 426         void *context,
 427         const char *requested_user,
 428         unsigned rlen,
 429         const char *auth_identity,
 430         unsigned alen,
 431         const char *def_realm,
 432         unsigned urlen,
 433         struct propctx *propctx)
 434 {
 435         Connection *conn = (Connection *)context;
 436         struct berval authcDN, authzDN;
 437         int rc;
 438
 439         authcDN.bv_val = (char *)auth_identity;
 440         authcDN.bv_len = alen;
 441
 442         authzDN.bv_val = (char *)requested_user;
 443         authzDN.bv_len = rlen;
 444
 445 #ifdef NEW_LOGGING
 446         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 447                 "slap_sasl_authorize: conn %d authcDN=\"%s\" authzDN=\"%s\"\n",
 448                         conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val));
 449 #else
 450         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 451                 "authcDN=\"%s\" authzDN=\"%s\"\n",
 452                 conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val );
 453 #endif
 454
 455         rc = slap_sasl_authorized( &authcDN, &authzDN );
 456         if ( rc != LDAP_SUCCESS ) {
 457 #ifdef NEW_LOGGING
 458                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 459                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 460                            (long)(conn ? conn->c_connid : -1), rc ));
 461 #else
 462                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 463                         " authorization disallowed (%d)\n",
 464                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 465 #endif
 466
 467                 sasl_seterror( sconn, 0, "not authorized" );
 468                 return SASL_NOAUTHZ;
 469         }
 470
 471 #ifdef NEW_LOGGING
 472         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 473                    "slap_sasl_authorize: conn %d authorization allowed\n",
 474                    (long)(conn ? conn->c_connid : -1 ) ));
 475 #else
 476         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 477                 " authorization allowed\n",
 478                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 479 #endif
 480
 481         return SASL_OK;
 482 }
 483 #else
 484 static int
 485 slap_sasl_authorize(
 486         void *context,
 487         const char *authcid,
 488         const char *authzid,
 489         const char **user,
 490         const char **errstr)
 491 {
 492         struct berval authcDN, authzDN;
 493         int rc;
 494         Connection *conn = context;
 495         char *realm;
 496
 497         *user = NULL;
 498
 499 #ifdef NEW_LOGGING
 500         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 501                    "slap_sasl_authorize: conn %d         authcid=\"%s\" authzid=\"%s\"\n",
 502                    conn ? conn->c_connid : -1,
 503                    authcid ? authcid : "<empty>",
 504                    authzid ? authzid : "<empty>" ));
 505 #else
 506         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 507                 "authcid=\"%s\" authzid=\"%s\"\n",
 508                 (long) (conn ? conn->c_connid : -1),
 509                 authcid ? authcid : "<empty>",
 510                 authzid ? authzid : "<empty>" );
 511 #endif
 512
 513         /* Figure out how much data we have for the dn */
 514         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 515         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 516 #ifdef NEW_LOGGING
 517                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 518                         "slap_sasl_authorize: getprop(REALM) failed.\n" ));
 519 #else
 520                 Debug(LDAP_DEBUG_TRACE,
 521                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 522 #endif
 523                 *errstr = "Could not extract realm";
 524                 return SASL_NOAUTHZ;
 525         }
 526
 527         /* Convert the identities to DN's. If no authzid was given, client will
 528            be bound as the DN matching their username */
 529         rc = slap_sasl_getdn( conn, (char *)authcid, realm, &authcDN, FLAG_GETDN_AUTHCID );
 530         if( rc != LDAP_SUCCESS ) {
 531                 *errstr = ldap_err2string( rc );
 532                 return SASL_NOAUTHZ;
 533         }
 534         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 535 #ifdef NEW_LOGGING
 536                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 537                            "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 538                            conn ? conn->c_connid : -1, authcDN.bv_val ));
 539 #else
 540                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 541                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 542 #endif
 543
 544                 *user = authcDN.bv_val;
 545                 *errstr = NULL;
 546                 return SASL_OK;
 547         }
 548         rc = slap_sasl_getdn( conn, (char *)authzid, realm, &authzDN, FLAG_GETDN_AUTHZID );
 549         if( rc != LDAP_SUCCESS ) {
 550                 ch_free( authcDN.bv_val );
 551                 *errstr = ldap_err2string( rc );
 552                 return SASL_NOAUTHZ;
 553         }
 554
 555         rc = slap_sasl_authorized( &authcDN, &authzDN );
 556         if( rc ) {
 557 #ifdef NEW_LOGGING
 558                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 559                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 560                            (long)(conn ? conn->c_connid : -1), rc ));
 561 #else
 562                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 563                         " authorization disallowed (%d)\n",
 564                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 565 #endif
 566
 567                 *errstr = "not authorized";
 568                 ch_free( authcDN.bv_val );
 569                 ch_free( authzDN.bv_val );
 570                 return SASL_NOAUTHZ;
 571         }
 572
 573 #ifdef NEW_LOGGING
 574         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 575                    "slap_sasl_authorize: conn %d authorization allowed\n",
 576                    (long)(conn ? conn->c_connid : -1 ) ));
 577 #else
 578         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 579                 " authorization allowed\n",
 580                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 581 #endif
 582
 583
 584         ch_free( authcDN.bv_val );
 585         *user = authzDN.bv_val;
 586         *errstr = NULL;
 587         return SASL_OK;
 588 }
 589 #endif /* SASL_VERSION_MAJOR >= 2 */
 590
 591 static int
 592 slap_sasl_err2ldap( int saslerr )
 593 {
 594         int rc;
 595
 596         switch (saslerr) {
 597                 case SASL_CONTINUE:
 598                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 599                         break;
 600                 case SASL_FAIL:
 601                         rc = LDAP_OTHER;
 602                         break;
 603                 case SASL_NOMEM:
 604                         rc = LDAP_OTHER;
 605                         break;
 606                 case SASL_NOMECH:
 607                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 608                         break;
 609                 case SASL_BADAUTH:
 610                         rc = LDAP_INVALID_CREDENTIALS;
 611                         break;
 612                 case SASL_NOAUTHZ:
 613                         rc = LDAP_INSUFFICIENT_ACCESS;
 614                         break;
 615                 case SASL_TOOWEAK:
 616                 case SASL_ENCRYPT:
 617                         rc = LDAP_INAPPROPRIATE_AUTH;
 618                         break;
 619                 default:
 620                         rc = LDAP_OTHER;
 621                         break;
 622         }
 623
 624         return rc;
 625 }
 626 #endif
 627
 628
 629 int slap_sasl_init( void )
 630 {
 631 #ifdef HAVE_CYRUS_SASL
 632         int rc;
 633         static sasl_callback_t server_callbacks[] = {
 634                 { SASL_CB_LOG, &slap_sasl_log, NULL },
 635                 { SASL_CB_LIST_END, NULL, NULL }
 636         };
 637
 638         sasl_set_alloc(
 639                 ch_malloc,
 640                 ch_calloc,
 641                 ch_realloc,
 642                 ch_free );
 643
 644         sasl_set_mutex(
 645                 ldap_pvt_sasl_mutex_new,
 646                 ldap_pvt_sasl_mutex_lock,
 647                 ldap_pvt_sasl_mutex_unlock,
 648                 ldap_pvt_sasl_mutex_dispose );
 649
 650         /* should provide callbacks for logging */
 651         /* server name should be configurable */
 652         rc = sasl_server_init( server_callbacks, "slapd" );
 653
 654         if( rc != SASL_OK ) {
 655 #ifdef NEW_LOGGING
 656                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 657                            "slap_sasl_init: init failed.\n" ));
 658 #else
 659                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
 660                         0, 0, 0 );
 661 #endif
 662
 663                 return -1;
 664         }
 665
 666 #ifdef NEW_LOGGING
 667         LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 668                    "slap_sasl_init: initialized!\n"));
 669 #else
 670         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
 671                 0, 0, 0 );
 672 #endif
 673
 674
 675         /* default security properties */
 676         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
 677         sasl_secprops.max_ssf = INT_MAX;
 678         sasl_secprops.maxbufsize = 65536;
 679         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
 680 #endif
 681
 682         return 0;
 683 }
 684
 685 int slap_sasl_destroy( void )
 686 {
 687 #ifdef HAVE_CYRUS_SASL
 688         sasl_done();
 689 #endif
 690         free( global_host );
 691         global_host = NULL;
 692
 693         return 0;
 694 }
 695
 696 int slap_sasl_open( Connection *conn )
 697 {
 698         int cb, sc = LDAP_SUCCESS;
 699 #if SASL_VERSION_MAJOR >= 2
 700         char *ipremoteport = NULL, *iplocalport = NULL;
 701 #endif
 702
 703 #ifdef HAVE_CYRUS_SASL
 704         sasl_conn_t *ctx = NULL;
 705         sasl_callback_t *session_callbacks;
 706
 707         assert( conn->c_sasl_context == NULL );
 708         assert( conn->c_sasl_extra == NULL );
 709
 710         conn->c_sasl_layers = 0;
 711
 712         session_callbacks =
 713 #if SASL_VERSION_MAJOR >= 2
 714                 ch_calloc( 5, sizeof(sasl_callback_t));
 715 #else
 716                 ch_calloc( 3, sizeof(sasl_callback_t));
 717 #endif
 718         conn->c_sasl_extra = session_callbacks;
 719
 720         session_callbacks[cb=0].id = SASL_CB_LOG;
 721         session_callbacks[cb].proc = &slap_sasl_log;
 722         session_callbacks[cb++].context = conn;
 723
 724         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
 725         session_callbacks[cb].proc = &slap_sasl_authorize;
 726         session_callbacks[cb++].context = conn;
 727
 728 #if SASL_VERSION_MAJOR >= 2
 729         session_callbacks[cb].id = SASL_CB_CANON_USER;
 730         session_callbacks[cb].proc = &slap_sasl_canonicalize;
 731         session_callbacks[cb++].context = conn;
 732
 733         /* XXXX: this should be conditional */
 734         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
 735         session_callbacks[cb].proc = &slap_sasl_checkpass;
 736         session_callbacks[cb++].context = conn;
 737 #endif
 738
 739         session_callbacks[cb].id = SASL_CB_LIST_END;
 740         session_callbacks[cb].proc = NULL;
 741         session_callbacks[cb++].context = NULL;
 742
 743         if( global_host == NULL ) {
 744                 global_host = ldap_pvt_get_fqdn( NULL );
 745         }
 746
 747         /* create new SASL context */
 748 #if SASL_VERSION_MAJOR >= 2
 749         if ( conn->c_sock_name.bv_len != 0 &&
 750              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
 751                 char *p;
 752
 753                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
 754                 /* Convert IPv6 addresses to address;port syntax. */
 755                 p = strrchr( iplocalport, ' ' );
 756                 if ( p != NULL ) {
 757                         *p = ';';
 758                 }
 759         }
 760         if ( conn->c_peer_name.bv_len != 0 &&
 761              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
 762                 char *p;
 763
 764                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
 765                 /* Convert IPv6 addresses to address;port syntax. */
 766                 p = strrchr( ipremoteport, ' ' );
 767                 if ( p != NULL ) {
 768                         *p = ';';
 769                 }
 770         }
 771         sc = sasl_server_new( "ldap", global_host, global_realm,
 772                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
 773         if ( iplocalport != NULL ) {
 774                 ch_free( iplocalport );
 775         }
 776         if ( ipremoteport != NULL ) {
 777                 ch_free( ipremoteport );
 778         }
 779 #else
 780         sc = sasl_server_new( "ldap", global_host, global_realm,
 781                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
 782 #endif
 783
 784         if( sc != SASL_OK ) {
 785 #ifdef NEW_LOGGING
 786                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 787                            "slap_sasl_open: sasl_server_new failed: %d\n", sc ));
 788 #else
 789                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
 790                         sc, 0, 0 );
 791 #endif
 792
 793                 return -1;
 794         }
 795
 796         conn->c_sasl_context = ctx;
 797
 798         if( sc == SASL_OK ) {
 799                 sc = sasl_setprop( ctx,
 800                         SASL_SEC_PROPS, &sasl_secprops );
 801
 802                 if( sc != SASL_OK ) {
 803 #ifdef NEW_LOGGING
 804                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 805                                    "slap_sasl_open: sasl_setprop failed: %d \n", sc ));
 806 #else
 807                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
 808                                 sc, 0, 0 );
 809 #endif
 810
 811                         slap_sasl_close( conn );
 812                         return -1;
 813                 }
 814         }
 815
 816         sc = slap_sasl_err2ldap( sc );
 817 #endif
 818         return sc;
 819 }
 820
 821 int slap_sasl_external(
 822         Connection *conn,
 823         slap_ssf_t ssf,
 824         const char *auth_id )
 825 {
 826 #if SASL_VERSION_MAJOR >= 2
 827         int sc;
 828         sasl_conn_t *ctx = conn->c_sasl_context;
 829
 830         if ( ctx == NULL ) {
 831                 return LDAP_UNAVAILABLE;
 832         }
 833
 834         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 835
 836         if ( sc != SASL_OK ) {
 837                 return LDAP_OTHER;
 838         }
 839
 840         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
 841
 842         if ( sc != SASL_OK ) {
 843                 return LDAP_OTHER;
 844         }
 845
 846 #elif defined(HAVE_CYRUS_SASL)
 847         int sc;
 848         sasl_conn_t *ctx = conn->c_sasl_context;
 849         sasl_external_properties_t extprops;
 850
 851         if ( ctx == NULL ) {
 852                 return LDAP_UNAVAILABLE;
 853         }
 854
 855         memset( &extprops, '\0', sizeof(extprops) );
 856         extprops.ssf = ssf;
 857         extprops.auth_id = (char *) auth_id;
 858
 859         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 860                 (void *) &extprops );
 861
 862         if ( sc != SASL_OK ) {
 863                 return LDAP_OTHER;
 864         }
 865 #endif
 866
 867         return LDAP_SUCCESS;
 868 }
 869
 870 int slap_sasl_reset( Connection *conn )
 871 {
 872 #ifdef HAVE_CYRUS_SASL
 873         sasl_conn_t *ctx = conn->c_sasl_context;
 874
 875         if( ctx != NULL ) {
 876         }
 877 #endif
 878         /* must return "anonymous" */
 879         return LDAP_SUCCESS;
 880 }
 881
 882 char ** slap_sasl_mechs( Connection *conn )
 883 {
 884         char **mechs = NULL;
 885
 886 #ifdef HAVE_CYRUS_SASL
 887         sasl_conn_t *ctx = conn->c_sasl_context;
 888
 889         if( ctx != NULL ) {
 890                 int sc;
 891                 SASL_CONST char *mechstr;
 892
 893                 sc = sasl_listmech( ctx,
 894                         NULL, NULL, ",", NULL,
 895                         &mechstr, NULL, NULL );
 896
 897                 if( sc != SASL_OK ) {
 898 #ifdef NEW_LOGGING
 899                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 900                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
 901 #else
 902                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
 903                                 sc, 0, 0 );
 904 #endif
 905
 906                         return NULL;
 907                 }
 908
 909                 mechs = str2charray( mechstr, "," );
 910
 911 #if SASL_VERSION_MAJOR < 2
 912                 ch_free( mechstr );
 913 #endif
 914         }
 915 #endif
 916
 917         return mechs;
 918 }
 919
 920 int slap_sasl_close( Connection *conn )
 921 {
 922 #ifdef HAVE_CYRUS_SASL
 923         sasl_conn_t *ctx = conn->c_sasl_context;
 924
 925         if( ctx != NULL ) {
 926                 sasl_dispose( &ctx );
 927         }
 928
 929         conn->c_sasl_context = NULL;
 930
 931         free( conn->c_sasl_extra );
 932         conn->c_sasl_extra = NULL;
 933 #endif
 934
 935         return LDAP_SUCCESS;
 936 }
 937
 938 int slap_sasl_bind(
 939     Connection          *conn,
 940     Operation           *op,
 941     struct berval       *dn,
 942     struct berval       *ndn,
 943     struct berval       *cred,
 944         struct berval                   *edn,
 945         slap_ssf_t              *ssfp )
 946 {
 947         int rc = 1;
 948
 949 #ifdef HAVE_CYRUS_SASL
 950         sasl_conn_t *ctx = conn->c_sasl_context;
 951         struct berval response;
 952         unsigned reslen = 0;
 953         const char *errstr = NULL;
 954         int sc;
 955
 956 #ifdef NEW_LOGGING
 957         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 958                 "sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
 959                 conn->c_connid,
 960                 dn->bv_len ? dn->bv_val : "",
 961                 conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech.bv_val,
 962                 cred ? cred->bv_len : 0 ));
 963 #else
 964         Debug(LDAP_DEBUG_ARGS,
 965                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
 966                 dn->bv_len ? dn->bv_val : "",
 967                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
 968                 cred ? cred->bv_len : 0 );
 969 #endif
 970
 971
 972         if( ctx == NULL ) {
 973                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
 974                         NULL, "SASL unavailable on this session", NULL, NULL );
 975                 return rc;
 976         }
 977
 978 #if SASL_VERSION_MAJOR >= 2
 979 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 980         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
 981 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 982         sasl_server_step( ctx, cred, clen, resp, rlen )
 983 #else
 984 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 985         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
 986 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 987         sasl_server_step( ctx, cred, clen, resp, rlen, err )
 988 #endif
 989
 990         if ( !conn->c_sasl_bind_in_progress ) {
 991                 sc = START( ctx,
 992                         conn->c_sasl_bind_mech.bv_val,
 993                         cred->bv_len ? cred->bv_val : "",
 994                         cred->bv_len,
 995                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
 996
 997         } else {
 998                 sc = STEP( ctx,
 999                         cred->bv_val, cred->bv_len,
1000                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1001         }
1002
1003         response.bv_len = reslen;
1004
1005         if ( sc == SASL_OK ) {
1006                 char *username = NULL;
1007                 char *realm = NULL;
1008
1009 #if SASL_VERSION_MAJOR >= 2
1010                 sc = sasl_getprop( ctx, SASL_DEFUSERREALM, (const void **)&realm );
1011 #else
1012                 sc = sasl_getprop( ctx, SASL_REALM, (void **)&realm );
1013 #endif
1014                 sc = sasl_getprop( ctx,
1015                         SASL_USERNAME, (SASL_CONST void **)&username );
1016
1017                 if ( sc != SASL_OK ) {
1018 #ifdef NEW_LOGGING
1019                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1020                                 "slap_sasl_bind: getprop(USERNAME) failed: %d\n", sc ));
1021 #else
1022                         Debug(LDAP_DEBUG_TRACE,
1023                                 "slap_sasl_bind: getprop(USERNAME) failed!\n",
1024                                 0, 0, 0);
1025 #endif
1026
1027
1028                         send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1029                                 NULL, "no SASL username", NULL, NULL );
1030
1031                 } else {
1032                         rc = slap_sasl_getdn( conn, username, realm, edn, FLAG_GETDN_FINAL );
1033
1034                         if( rc == LDAP_SUCCESS ) {
1035                                 sasl_ssf_t *ssf = NULL;
1036                                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1037                                 *ssfp = ssf ? *ssf : 0;
1038
1039                                 if( *ssfp ) {
1040                                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1041                                         conn->c_sasl_layers++;
1042                                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1043                                 }
1044
1045                                 send_ldap_sasl( conn, op, rc,
1046                                         NULL, NULL, NULL, NULL,
1047                                         response.bv_len ? &response : NULL );
1048
1049                         } else {
1050                                 send_ldap_result( conn, op, rc,
1051                                         NULL, errstr, NULL, NULL );
1052                         }
1053                 }
1054
1055         } else if ( sc == SASL_CONTINUE ) {
1056                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1057                         NULL, NULL, NULL, NULL, &response );
1058
1059         } else {
1060                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1061                         NULL, errstr, NULL, NULL );
1062         }
1063
1064 #if SASL_VERSION_MAJOR < 2
1065         if( response.bv_len ) {
1066                 ch_free( response.bv_val );
1067         }
1068 #endif
1069
1070 #ifdef NEW_LOGGING
1071         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
1072                 "slap_sasl_bind: rc=%d\n", rc ));
1073 #else
1074         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1075 #endif
1076
1077
1078 #else
1079         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1080                 NULL, "SASL not supported", NULL, NULL );
1081 #endif
1082
1083         return rc;
1084 }
1085
1086 char* slap_sasl_secprops( const char *in )
1087 {
1088 #ifdef HAVE_CYRUS_SASL
1089         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1090
1091         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1092 #else
1093         return "SASL not supported";
1094 #endif
1095 }