git.sur5r.net Git - openldap/blob - libraries/libldap/cyrus.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2009 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19
  20 #include <ac/socket.h>
  21 #include <ac/stdlib.h>
  22 #include <ac/string.h>
  23 #include <ac/time.h>
  24 #include <ac/errno.h>
  25 #include <ac/ctype.h>
  26 #include <ac/unistd.h>
  27
  28 #ifdef HAVE_LIMITS_H
  29 #include <limits.h>
  30 #endif
  31
  32 #include "ldap-int.h"
  33
  34 #ifdef HAVE_CYRUS_SASL
  35
  36 #ifdef HAVE_LIMITS_H
  37 #include <limits.h>
  38 #endif
  39
  40 #ifndef INT_MAX
  41 #define INT_MAX 2147483647      /* 32 bit signed max */
  42 #endif
  43
  44 #ifdef LDAP_R_COMPILE
  45 ldap_pvt_thread_mutex_t ldap_int_sasl_mutex;
  46 #endif
  47
  48 #ifdef HAVE_SASL_SASL_H
  49 #include <sasl/sasl.h>
  50 #else
  51 #include <sasl.h>
  52 #endif
  53
  54 #if SASL_VERSION_MAJOR >= 2
  55 #define SASL_CONST const
  56 #else
  57 #define SASL_CONST
  58 #endif
  59
  60 /*
  61 * Various Cyrus SASL related stuff.
  62 */
  63
  64 static const sasl_callback_t client_callbacks[] = {
  65 #ifdef SASL_CB_GETREALM
  66         { SASL_CB_GETREALM, NULL, NULL },
  67 #endif
  68         { SASL_CB_USER, NULL, NULL },
  69         { SASL_CB_AUTHNAME, NULL, NULL },
  70         { SASL_CB_PASS, NULL, NULL },
  71         { SASL_CB_ECHOPROMPT, NULL, NULL },
  72         { SASL_CB_NOECHOPROMPT, NULL, NULL },
  73         { SASL_CB_LIST_END, NULL, NULL }
  74 };
  75
  76 int ldap_int_sasl_init( void )
  77 {
  78         /* XXX not threadsafe */
  79         static int sasl_initialized = 0;
  80
  81 #ifdef HAVE_SASL_VERSION
  82         /* stringify the version number, sasl.h doesn't do it for us */
  83 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
  84 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
  85 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
  86                                 SASL_VERSION_STEP)
  87         { int rc;
  88         sasl_version( NULL, &rc );
  89         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
  90                 (rc & 0xffff) < SASL_VERSION_STEP) {
  91                 char version[sizeof("xxx.xxx.xxxxx")];
  92                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
  93                         rc & 0xffff );
  94
  95                 Debug( LDAP_DEBUG_ANY,
  96                 "ldap_int_sasl_init: SASL library version mismatch:"
  97                 " expected " SASL_VERSION_STRING ","
  98                 " got %s\n", version, 0, 0 );
  99                 return -1;
 100         }
 101         }
 102 #endif
 103         if ( sasl_initialized ) {
 104                 return 0;
 105         }
 106
 107 /* SASL 2 takes care of its own memory completely internally */
 108 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
 109         sasl_set_alloc(
 110                 ber_memalloc,
 111                 ber_memcalloc,
 112                 ber_memrealloc,
 113                 ber_memfree );
 114 #endif /* CSRIMALLOC */
 115
 116 #ifdef LDAP_R_COMPILE
 117         sasl_set_mutex(
 118                 ldap_pvt_sasl_mutex_new,
 119                 ldap_pvt_sasl_mutex_lock,
 120                 ldap_pvt_sasl_mutex_unlock,
 121                 ldap_pvt_sasl_mutex_dispose );
 122 #endif
 123
 124         if ( sasl_client_init( NULL ) == SASL_OK ) {
 125                 sasl_initialized = 1;
 126                 return 0;
 127         }
 128
 129 #if SASL_VERSION_MAJOR < 2
 130         /* A no-op to make sure we link with Cyrus 1.5 */
 131         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
 132 #endif
 133         return -1;
 134 }
 135
 136 static void
 137 sb_sasl_cyrus_init(
 138         struct sb_sasl_generic_data *p,
 139         ber_len_t *min_send,
 140         ber_len_t *max_send,
 141         ber_len_t *max_recv)
 142 {
 143         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 144         ber_len_t maxbuf;
 145
 146         sasl_getprop( sasl_context, SASL_MAXOUTBUF,
 147                       (SASL_CONST void **)(char *) &maxbuf );
 148
 149         *min_send = SASL_MIN_BUFF_SIZE;
 150         *max_send = maxbuf;
 151         *max_recv = SASL_MAX_BUFF_SIZE;
 152 }
 153
 154 static ber_int_t
 155 sb_sasl_cyrus_encode(
 156         struct sb_sasl_generic_data *p,
 157         unsigned char *buf,
 158         ber_len_t len,
 159         Sockbuf_Buf *dst)
 160 {
 161         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 162         ber_int_t ret;
 163         unsigned tmpsize = dst->buf_size;
 164
 165         ret = sasl_encode( sasl_context, (char *)buf, len,
 166                            (SASL_CONST char **)&dst->buf_base,
 167                            &tmpsize );
 168
 169         dst->buf_size = tmpsize;
 170         dst->buf_end = dst->buf_size;
 171
 172         if ( ret != SASL_OK ) {
 173                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
 174                                 "sb_sasl_cyrus_encode: failed to encode packet: %s\n",
 175                                 sasl_errstring( ret, NULL, NULL ) );
 176                 return -1;
 177         }
 178
 179         return 0;
 180 }
 181
 182 static ber_int_t
 183 sb_sasl_cyrus_decode(
 184         struct sb_sasl_generic_data *p,
 185         const Sockbuf_Buf *src,
 186         Sockbuf_Buf *dst)
 187 {
 188         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 189         ber_int_t ret;
 190         unsigned tmpsize = dst->buf_size;
 191
 192         ret = sasl_decode( sasl_context,
 193                            src->buf_base, src->buf_end,
 194                            (SASL_CONST char **)&dst->buf_base,
 195                            (unsigned *)&tmpsize );
 196
 197
 198         dst->buf_size = tmpsize;
 199         dst->buf_end = dst->buf_size;
 200
 201         if ( ret != SASL_OK ) {
 202                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
 203                                 "sb_sasl_cyrus_decode: failed to decode packet: %s\n",
 204                                 sasl_errstring( ret, NULL, NULL ) );
 205                 return -1;
 206         }
 207
 208         return 0;
 209 }
 210
 211 static void
 212 sb_sasl_cyrus_reset_buf(
 213         struct sb_sasl_generic_data *p,
 214         Sockbuf_Buf *buf)
 215 {
 216 #if SASL_VERSION_MAJOR >= 2
 217         ber_pvt_sb_buf_init( buf );
 218 #else
 219         ber_pvt_sb_buf_destroy( buf );
 220 #endif
 221 }
 222
 223 static void
 224 sb_sasl_cyrus_fini(
 225         struct sb_sasl_generic_data *p)
 226 {
 227 #if SASL_VERSION_MAJOR >= 2
 228         /*
 229          * SASLv2 encode/decode buffers are managed by
 230          * libsasl2. Ensure they are not freed by liblber.
 231          */
 232         p->buf_in.buf_base = NULL;
 233         p->buf_out.buf_base = NULL;
 234 #endif
 235 }
 236
 237 static const struct sb_sasl_generic_ops sb_sasl_cyrus_ops = {
 238         sb_sasl_cyrus_init,
 239         sb_sasl_cyrus_encode,
 240         sb_sasl_cyrus_decode,
 241         sb_sasl_cyrus_reset_buf,
 242         sb_sasl_cyrus_fini
 243  };
 244
 245 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 246 {
 247         struct sb_sasl_generic_install install_arg;
 248
 249         install_arg.ops         = &sb_sasl_cyrus_ops;
 250         install_arg.ops_private = ctx_arg;
 251
 252         return ldap_pvt_sasl_generic_install( sb, &install_arg );
 253 }
 254
 255 void ldap_pvt_sasl_remove( Sockbuf *sb )
 256 {
 257         ldap_pvt_sasl_generic_remove( sb );
 258 }
 259
 260 static int
 261 sasl_err2ldap( int saslerr )
 262 {
 263         int rc;
 264
 265         /* map SASL errors to LDAP API errors returned by:
 266          *      sasl_client_new()
 267          *              SASL_OK, SASL_NOMECH, SASL_NOMEM
 268          *      sasl_client_start()
 269          *              SASL_OK, SASL_NOMECH, SASL_NOMEM, SASL_INTERACT
 270          *      sasl_client_step()
 271          *              SASL_OK, SASL_INTERACT, SASL_BADPROT, SASL_BADSERV
 272          */
 273
 274         switch (saslerr) {
 275                 case SASL_CONTINUE:
 276                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 277                         break;
 278                 case SASL_INTERACT:
 279                         rc = LDAP_LOCAL_ERROR;
 280                         break;
 281                 case SASL_OK:
 282                         rc = LDAP_SUCCESS;
 283                         break;
 284                 case SASL_NOMEM:
 285                         rc = LDAP_NO_MEMORY;
 286                         break;
 287                 case SASL_NOMECH:
 288                         rc = LDAP_AUTH_UNKNOWN;
 289                         break;
 290                 case SASL_BADPROT:
 291                         rc = LDAP_DECODING_ERROR;
 292                         break;
 293                 case SASL_BADSERV:
 294                         rc = LDAP_AUTH_UNKNOWN;
 295                         break;
 296
 297                 /* other codes */
 298                 case SASL_BADAUTH:
 299                         rc = LDAP_AUTH_UNKNOWN;
 300                         break;
 301                 case SASL_NOAUTHZ:
 302                         rc = LDAP_PARAM_ERROR;
 303                         break;
 304                 case SASL_FAIL:
 305                         rc = LDAP_LOCAL_ERROR;
 306                         break;
 307                 case SASL_TOOWEAK:
 308                 case SASL_ENCRYPT:
 309                         rc = LDAP_AUTH_UNKNOWN;
 310                         break;
 311                 default:
 312                         rc = LDAP_LOCAL_ERROR;
 313                         break;
 314         }
 315
 316         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 317         return rc;
 318 }
 319
 320 int
 321 ldap_int_sasl_open(
 322         LDAP *ld,
 323         LDAPConn *lc,
 324         const char * host )
 325 {
 326         int rc;
 327         sasl_conn_t *ctx;
 328
 329         assert( lc->lconn_sasl_authctx == NULL );
 330
 331         if ( host == NULL ) {
 332                 ld->ld_errno = LDAP_LOCAL_ERROR;
 333                 return ld->ld_errno;
 334         }
 335
 336         if ( ldap_int_sasl_init() ) {
 337                 ld->ld_errno = LDAP_LOCAL_ERROR;
 338                 return ld->ld_errno;
 339         }
 340
 341 #if SASL_VERSION_MAJOR >= 2
 342         rc = sasl_client_new( "ldap", host, NULL, NULL,
 343                 client_callbacks, 0, &ctx );
 344 #else
 345         rc = sasl_client_new( "ldap", host, client_callbacks,
 346                 SASL_SECURITY_LAYER, &ctx );
 347 #endif
 348
 349         if ( rc != SASL_OK ) {
 350                 ld->ld_errno = sasl_err2ldap( rc );
 351                 return ld->ld_errno;
 352         }
 353
 354         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 355                 host, 0, 0 );
 356
 357         lc->lconn_sasl_authctx = ctx;
 358
 359         return LDAP_SUCCESS;
 360 }
 361
 362 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 363 {
 364         sasl_conn_t *ctx = lc->lconn_sasl_authctx;
 365
 366         if( ctx != NULL ) {
 367                 sasl_dispose( &ctx );
 368                 if ( lc->lconn_sasl_sockctx &&
 369                         lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
 370                         ctx = lc->lconn_sasl_sockctx;
 371                         sasl_dispose( &ctx );
 372                 }
 373                 lc->lconn_sasl_sockctx = NULL;
 374                 lc->lconn_sasl_authctx = NULL;
 375         }
 376
 377         return LDAP_SUCCESS;
 378 }
 379
 380 int
 381 ldap_int_sasl_bind(
 382         LDAP                    *ld,
 383         const char              *dn,
 384         const char              *mechs,
 385         LDAPControl             **sctrls,
 386         LDAPControl             **cctrls,
 387         unsigned                flags,
 388         LDAP_SASL_INTERACT_PROC *interact,
 389         void * defaults )
 390 {
 391         char *data;
 392         const char *mech = NULL;
 393         const char *pmech = NULL;
 394         int                     saslrc, rc;
 395         sasl_ssf_t              *ssf = NULL;
 396         sasl_conn_t     *ctx, *oldctx = NULL;
 397         sasl_interact_t *prompts = NULL;
 398         unsigned credlen;
 399         struct berval ccred;
 400         ber_socket_t            sd;
 401         void    *ssl;
 402
 403         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 404                 mechs ? mechs : "<null>", 0, 0 );
 405
 406         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 407         if (ld->ld_version < LDAP_VERSION3) {
 408                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 409                 return ld->ld_errno;
 410         }
 411
 412         rc = 0;
 413 #ifdef LDAP_R_COMPILE
 414         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 415 #endif
 416         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 417
 418         if ( sd == AC_SOCKET_INVALID ) {
 419                 /* not connected yet */
 420
 421                 rc = ldap_open_defconn( ld );
 422
 423                 if ( rc == 0 ) {
 424                         ber_sockbuf_ctrl( ld->ld_defconn->lconn_sb,
 425                                 LBER_SB_OPT_GET_FD, &sd );
 426
 427                         if( sd == AC_SOCKET_INVALID ) {
 428                                 ld->ld_errno = LDAP_LOCAL_ERROR;
 429                                 rc = ld->ld_errno;
 430                         }
 431                 }
 432         }
 433 #ifdef LDAP_R_COMPILE
 434         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 435 #endif
 436         if( rc != 0 ) return ld->ld_errno;
 437
 438         oldctx = ld->ld_defconn->lconn_sasl_authctx;
 439
 440         /* If we already have an authentication context, clear it out */
 441         if( oldctx ) {
 442                 if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
 443                         sasl_dispose( &oldctx );
 444                 }
 445                 ld->ld_defconn->lconn_sasl_authctx = NULL;
 446         }
 447
 448         {
 449                 char *saslhost;
 450                 int nocanon = (int)LDAP_BOOL_GET( &ld->ld_options,
 451                         LDAP_BOOL_SASL_NOCANON );
 452
 453                 /* If we don't need to canonicalize just use the host
 454                  * from the LDAP URI.
 455                  */
 456                 if ( nocanon )
 457                         saslhost = ld->ld_defconn->lconn_server->lud_host;
 458                 else
 459                         saslhost = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
 460                         "localhost" );
 461                 rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
 462                 if ( !nocanon )
 463                         LDAP_FREE( saslhost );
 464         }
 465
 466         if ( rc != LDAP_SUCCESS ) return rc;
 467
 468         ctx = ld->ld_defconn->lconn_sasl_authctx;
 469
 470         /* Check for TLS */
 471         ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
 472         if ( ssl ) {
 473                 struct berval authid = BER_BVNULL;
 474                 ber_len_t fac;
 475
 476                 fac = ldap_pvt_tls_get_strength( ssl );
 477                 /* failure is OK, we just can't use SASL EXTERNAL */
 478                 (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 479
 480                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 481                 LDAP_FREE( authid.bv_val );
 482         }
 483
 484 #if !defined(_WIN32)
 485         /* Check for local */
 486         if ( ldap_pvt_url_scheme2proto(
 487                 ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 488         {
 489                 char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 490                         "cn=peercred,cn=external,cn=auth")];
 491                 sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 492                         "cn=peercred,cn=external,cn=auth",
 493                         getegid(), geteuid() );
 494                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 495                         LDAP_PVT_SASL_LOCAL_SSF );
 496         }
 497 #endif
 498
 499         /* (re)set security properties */
 500         sasl_setprop( ctx, SASL_SEC_PROPS,
 501                 &ld->ld_options.ldo_sasl_secprops );
 502
 503         ccred.bv_val = NULL;
 504         ccred.bv_len = 0;
 505
 506         do {
 507                 saslrc = sasl_client_start( ctx,
 508                         mechs,
 509 #if SASL_VERSION_MAJOR < 2
 510                         NULL,
 511 #endif
 512                         &prompts,
 513                         (SASL_CONST char **)&ccred.bv_val,
 514                         &credlen,
 515                         &mech );
 516
 517                 if( pmech == NULL && mech != NULL ) {
 518                         pmech = mech;
 519
 520                         if( flags != LDAP_SASL_QUIET ) {
 521                                 fprintf(stderr,
 522                                         "SASL/%s authentication started\n",
 523                                         pmech );
 524                         }
 525                 }
 526
 527                 if( saslrc == SASL_INTERACT ) {
 528                         int res;
 529                         if( !interact ) break;
 530                         res = (interact)( ld, flags, defaults, prompts );
 531
 532                         if( res != LDAP_SUCCESS ) break;
 533                 }
 534         } while ( saslrc == SASL_INTERACT );
 535
 536         ccred.bv_len = credlen;
 537
 538         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 539                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 540 #if SASL_VERSION_MAJOR >= 2
 541                 if ( ld->ld_error ) {
 542                         LDAP_FREE( ld->ld_error );
 543                 }
 544                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 545 #endif
 546                 goto done;
 547         }
 548
 549         do {
 550                 struct berval *scred;
 551                 unsigned credlen;
 552
 553                 scred = NULL;
 554
 555                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls,
 556                         &scred );
 557
 558                 if ( ccred.bv_val != NULL ) {
 559 #if SASL_VERSION_MAJOR < 2
 560                         LDAP_FREE( ccred.bv_val );
 561 #endif
 562                         ccred.bv_val = NULL;
 563                 }
 564
 565                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 566                         if( scred ) {
 567                                 /* and server provided us with data? */
 568                                 Debug( LDAP_DEBUG_TRACE,
 569                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 570                                         rc, saslrc, scred ? (long) scred->bv_len : -1L );
 571                                 ber_bvfree( scred );
 572                                 scred = NULL;
 573                         }
 574                         rc = ld->ld_errno;
 575                         goto done;
 576                 }
 577
 578                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 579                         /* we're done, no need to step */
 580                         if( scred ) {
 581                                 /* but we got additional data? */
 582 #define KLUDGE_FOR_MSAD
 583 #ifdef  KLUDGE_FOR_MSAD
 584                                 /*
 585                                  * MSAD provides empty additional data in violation of LDAP
 586                                  * technical specifications.  As no existing SASL mechanism
 587                                  * allows empty data with an outcome message, just ignore it
 588                                  * for now.  Hopefully MS will fix their bug before someone
 589                                  * defines a mechanism with possibly empty additional data.
 590                                  */
 591                                 if( scred->bv_len == 0 ) {
 592                                         Debug( LDAP_DEBUG_ANY,
 593                                                 "ldap_int_sasl_bind: ignoring "
 594                                                         " bogus empty data provided with SASL outcome message.\n",
 595                                                 rc, saslrc, scred->bv_len );
 596                                         ber_bvfree( scred );
 597                                 } else
 598 #endif
 599                                 {
 600                                         Debug( LDAP_DEBUG_TRACE,
 601                                                 "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 602                                                 rc, saslrc, scred->bv_len );
 603                                         rc = ld->ld_errno = LDAP_LOCAL_ERROR;
 604                                         ber_bvfree( scred );
 605                                         goto done;
 606                                 }
 607                         }
 608                         break;
 609                 }
 610
 611                 do {
 612                         if( ! scred ) {
 613                                 /* no data! */
 614                                 Debug( LDAP_DEBUG_TRACE,
 615                                         "ldap_int_sasl_bind: no data in step!\n",
 616                                         0, 0, 0 );
 617                         }
 618
 619                         saslrc = sasl_client_step( ctx,
 620                                 (scred == NULL) ? NULL : scred->bv_val,
 621                                 (scred == NULL) ? 0 : scred->bv_len,
 622                                 &prompts,
 623                                 (SASL_CONST char **)&ccred.bv_val,
 624                                 &credlen );
 625
 626                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 627                                 saslrc, 0, 0 );
 628
 629                         if( saslrc == SASL_INTERACT ) {
 630                                 int res;
 631                                 if( !interact ) break;
 632                                 res = (interact)( ld, flags, defaults, prompts );
 633                                 if( res != LDAP_SUCCESS ) break;
 634                         }
 635                 } while ( saslrc == SASL_INTERACT );
 636
 637                 ccred.bv_len = credlen;
 638                 ber_bvfree( scred );
 639
 640                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 641                         ld->ld_errno = sasl_err2ldap( saslrc );
 642 #if SASL_VERSION_MAJOR >= 2
 643                         if ( ld->ld_error ) {
 644                                 LDAP_FREE( ld->ld_error );
 645                         }
 646                         ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 647 #endif
 648                         rc = ld->ld_errno;
 649                         goto done;
 650                 }
 651         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 652
 653         if ( rc != LDAP_SUCCESS ) goto done;
 654
 655         if ( saslrc != SASL_OK ) {
 656 #if SASL_VERSION_MAJOR >= 2
 657                 if ( ld->ld_error ) {
 658                         LDAP_FREE( ld->ld_error );
 659                 }
 660                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 661 #endif
 662                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 663                 goto done;
 664         }
 665
 666         if( flags != LDAP_SASL_QUIET ) {
 667                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 668                         (SASL_CONST void **)(char *) &data );
 669                 if( saslrc == SASL_OK && data && *data ) {
 670                         fprintf( stderr, "SASL username: %s\n", data );
 671                 }
 672
 673 #if SASL_VERSION_MAJOR < 2
 674                 saslrc = sasl_getprop( ctx, SASL_REALM,
 675                         (SASL_CONST void **) &data );
 676                 if( saslrc == SASL_OK && data && *data ) {
 677                         fprintf( stderr, "SASL realm: %s\n", data );
 678                 }
 679 #endif
 680         }
 681
 682         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 683         if( saslrc == SASL_OK ) {
 684                 if( flags != LDAP_SASL_QUIET ) {
 685                         fprintf( stderr, "SASL SSF: %lu\n",
 686                                 (unsigned long) *ssf );
 687                 }
 688
 689                 if( ssf && *ssf ) {
 690                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 691                                 oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 692                                 sasl_dispose( &oldctx );
 693                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 694                         }
 695                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 696                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 697
 698                         if( flags != LDAP_SASL_QUIET ) {
 699                                 fprintf( stderr, "SASL data security layer installed.\n" );
 700                         }
 701                 }
 702         }
 703         ld->ld_defconn->lconn_sasl_authctx = ctx;
 704
 705 done:
 706         return rc;
 707 }
 708
 709 int
 710 ldap_int_sasl_external(
 711         LDAP *ld,
 712         LDAPConn *conn,
 713         const char * authid,
 714         ber_len_t ssf )
 715 {
 716         int sc;
 717         sasl_conn_t *ctx;
 718 #if SASL_VERSION_MAJOR < 2
 719         sasl_external_properties_t extprops;
 720 #else
 721         sasl_ssf_t sasl_ssf = ssf;
 722 #endif
 723
 724         ctx = conn->lconn_sasl_authctx;
 725
 726         if ( ctx == NULL ) {
 727                 return LDAP_LOCAL_ERROR;
 728         }
 729
 730 #if SASL_VERSION_MAJOR >= 2
 731         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 732         if ( sc == SASL_OK )
 733                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 734 #else
 735         memset( &extprops, '\0', sizeof(extprops) );
 736         extprops.ssf = ssf;
 737         extprops.auth_id = (char *) authid;
 738
 739         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 740                 (void *) &extprops );
 741 #endif
 742
 743         if ( sc != SASL_OK ) {
 744                 return LDAP_LOCAL_ERROR;
 745         }
 746
 747         return LDAP_SUCCESS;
 748 }
 749
 750
 751 #define GOT_MINSSF      1
 752 #define GOT_MAXSSF      2
 753 #define GOT_MAXBUF      4
 754
 755 static struct {
 756         struct berval key;
 757         int sflag;
 758         int ival;
 759         int idef;
 760 } sprops[] = {
 761         { BER_BVC("none"), 0, 0, 0 },
 762         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 763         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 764         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 765         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 766         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 767         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 768         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 769         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 770         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 771         { BER_BVNULL, 0, 0, 0 }
 772 };
 773
 774 void ldap_pvt_sasl_secprops_unparse(
 775         sasl_security_properties_t *secprops,
 776         struct berval *out )
 777 {
 778         int i, l = 0;
 779         int comma;
 780         char *ptr;
 781
 782         if ( secprops == NULL || out == NULL ) {
 783                 return;
 784         }
 785
 786         comma = 0;
 787         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 788                 if ( sprops[i].ival ) {
 789                         int v = 0;
 790
 791                         switch( sprops[i].ival ) {
 792                         case GOT_MINSSF: v = secprops->min_ssf; break;
 793                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 794                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 795                         }
 796                         /* It is the default, ignore it */
 797                         if ( v == sprops[i].idef ) continue;
 798
 799                         l += sprops[i].key.bv_len + 24;
 800                 } else if ( sprops[i].sflag ) {
 801                         if ( sprops[i].sflag & secprops->security_flags ) {
 802                                 l += sprops[i].key.bv_len;
 803                         }
 804                 } else if ( secprops->security_flags == 0 ) {
 805                         l += sprops[i].key.bv_len;
 806                 }
 807                 if ( comma ) l++;
 808                 comma = 1;
 809         }
 810         l++;
 811
 812         out->bv_val = LDAP_MALLOC( l );
 813         if ( out->bv_val == NULL ) {
 814                 out->bv_len = 0;
 815                 return;
 816         }
 817
 818         ptr = out->bv_val;
 819         comma = 0;
 820         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 821                 if ( sprops[i].ival ) {
 822                         int v = 0;
 823
 824                         switch( sprops[i].ival ) {
 825                         case GOT_MINSSF: v = secprops->min_ssf; break;
 826                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 827                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 828                         }
 829                         /* It is the default, ignore it */
 830                         if ( v == sprops[i].idef ) continue;
 831
 832                         if ( comma ) *ptr++ = ',';
 833                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 834                         comma = 1;
 835                 } else if ( sprops[i].sflag ) {
 836                         if ( sprops[i].sflag & secprops->security_flags ) {
 837                                 if ( comma ) *ptr++ = ',';
 838                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 839                                 comma = 1;
 840                         }
 841                 } else if ( secprops->security_flags == 0 ) {
 842                         if ( comma ) *ptr++ = ',';
 843                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 844                         comma = 1;
 845                 }
 846         }
 847         out->bv_len = ptr - out->bv_val;
 848 }
 849
 850 int ldap_pvt_sasl_secprops(
 851         const char *in,
 852         sasl_security_properties_t *secprops )
 853 {
 854         unsigned i, j, l;
 855         char **props;
 856         unsigned sflags = 0;
 857         int got_sflags = 0;
 858         sasl_ssf_t max_ssf = 0;
 859         int got_max_ssf = 0;
 860         sasl_ssf_t min_ssf = 0;
 861         int got_min_ssf = 0;
 862         unsigned maxbufsize = 0;
 863         int got_maxbufsize = 0;
 864
 865         if( secprops == NULL ) {
 866                 return LDAP_PARAM_ERROR;
 867         }
 868         props = ldap_str2charray( in, "," );
 869         if( props == NULL ) {
 870                 return LDAP_PARAM_ERROR;
 871         }
 872
 873         for( i=0; props[i]; i++ ) {
 874                 l = strlen( props[i] );
 875                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 876                         if ( l < sprops[j].key.bv_len ) continue;
 877                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 878                                 sprops[j].key.bv_len )) continue;
 879                         if ( sprops[j].ival ) {
 880                                 unsigned v;
 881                                 char *next = NULL;
 882                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 883                                         continue;
 884                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 885                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 886                                 switch( sprops[j].ival ) {
 887                                 case GOT_MINSSF:
 888                                         min_ssf = v; got_min_ssf++; break;
 889                                 case GOT_MAXSSF:
 890                                         max_ssf = v; got_max_ssf++; break;
 891                                 case GOT_MAXBUF:
 892                                         maxbufsize = v; got_maxbufsize++; break;
 893                                 }
 894                         } else {
 895                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 896                                 if ( sprops[j].sflag )
 897                                         sflags |= sprops[j].sflag;
 898                                 else
 899                                         sflags = 0;
 900                                 got_sflags++;
 901                         }
 902                         break;
 903                 }
 904                 if ( BER_BVISNULL( &sprops[j].key )) {
 905                         ldap_charray_free( props );
 906                         return LDAP_NOT_SUPPORTED;
 907                 }
 908         }
 909
 910         if(got_sflags) {
 911                 secprops->security_flags = sflags;
 912         }
 913         if(got_min_ssf) {
 914                 secprops->min_ssf = min_ssf;
 915         }
 916         if(got_max_ssf) {
 917                 secprops->max_ssf = max_ssf;
 918         }
 919         if(got_maxbufsize) {
 920                 secprops->maxbufsize = maxbufsize;
 921         }
 922
 923         ldap_charray_free( props );
 924         return LDAP_SUCCESS;
 925 }
 926
 927 int
 928 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 929 {
 930         int rc;
 931
 932         switch( option ) {
 933         case LDAP_OPT_X_SASL_SECPROPS:
 934                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 935                 if( rc == LDAP_SUCCESS ) return 0;
 936         }
 937
 938         return -1;
 939 }
 940
 941 int
 942 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 943 {
 944         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 945                 if ( ldap_int_sasl_init() )
 946                         return -1;
 947                 *(char ***)arg = (char **)sasl_global_listmech();
 948                 return 0;
 949         }
 950
 951         if ( ld == NULL )
 952                 return -1;
 953
 954         switch ( option ) {
 955                 case LDAP_OPT_X_SASL_MECH: {
 956                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 957                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 958                 } break;
 959                 case LDAP_OPT_X_SASL_REALM: {
 960                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 961                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 962                 } break;
 963                 case LDAP_OPT_X_SASL_AUTHCID: {
 964                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 965                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 966                 } break;
 967                 case LDAP_OPT_X_SASL_AUTHZID: {
 968                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 969                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 970                 } break;
 971
 972                 case LDAP_OPT_X_SASL_SSF: {
 973                         int sc;
 974                         sasl_ssf_t      *ssf;
 975                         sasl_conn_t *ctx;
 976
 977                         if( ld->ld_defconn == NULL ) {
 978                                 return -1;
 979                         }
 980
 981                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 982
 983                         if ( ctx == NULL ) {
 984                                 return -1;
 985                         }
 986
 987                         sc = sasl_getprop( ctx, SASL_SSF,
 988                                 (SASL_CONST void **)(char *) &ssf );
 989
 990                         if ( sc != SASL_OK ) {
 991                                 return -1;
 992                         }
 993
 994                         *(ber_len_t *)arg = *ssf;
 995                 } break;
 996
 997                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 998                         /* this option is write only */
 999                         return -1;
1000
1001                 case LDAP_OPT_X_SASL_SSF_MIN:
1002                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
1003                         break;
1004                 case LDAP_OPT_X_SASL_SSF_MAX:
1005                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
1006                         break;
1007                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1008                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1009                         break;
1010                 case LDAP_OPT_X_SASL_NOCANON:
1011                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1012                         break;
1013
1014                 case LDAP_OPT_X_SASL_SECPROPS:
1015                         /* this option is write only */
1016                         return -1;
1017
1018                 default:
1019                         return -1;
1020         }
1021         return 0;
1022 }
1023
1024 int
1025 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1026 {
1027         if ( ld == NULL )
1028                 return -1;
1029
1030         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1031                 return -1;
1032
1033         switch ( option ) {
1034         case LDAP_OPT_X_SASL_SSF:
1035                 /* This option is read-only */
1036                 return -1;
1037
1038         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1039                 int sc;
1040 #if SASL_VERSION_MAJOR < 2
1041                 sasl_external_properties_t extprops;
1042 #else
1043                 sasl_ssf_t sasl_ssf;
1044 #endif
1045                 sasl_conn_t *ctx;
1046
1047                 if( ld->ld_defconn == NULL ) {
1048                         return -1;
1049                 }
1050
1051                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1052
1053                 if ( ctx == NULL ) {
1054                         return -1;
1055                 }
1056
1057 #if SASL_VERSION_MAJOR >= 2
1058                 sasl_ssf = * (ber_len_t *)arg;
1059                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1060 #else
1061                 memset(&extprops, 0L, sizeof(extprops));
1062
1063                 extprops.ssf = * (ber_len_t *) arg;
1064
1065                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1066                         (void *) &extprops );
1067 #endif
1068
1069                 if ( sc != SASL_OK ) {
1070                         return -1;
1071                 }
1072                 } break;
1073
1074         case LDAP_OPT_X_SASL_SSF_MIN:
1075                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1076                 break;
1077         case LDAP_OPT_X_SASL_SSF_MAX:
1078                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1079                 break;
1080         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1081                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1082                 break;
1083         case LDAP_OPT_X_SASL_NOCANON:
1084                 if ( arg == LDAP_OPT_OFF ) {
1085                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1086                 } else {
1087                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1088                 }
1089                 break;
1090
1091         case LDAP_OPT_X_SASL_SECPROPS: {
1092                 int sc;
1093                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1094                         &ld->ld_options.ldo_sasl_secprops );
1095
1096                 return sc == LDAP_SUCCESS ? 0 : -1;
1097                 }
1098
1099         default:
1100                 return -1;
1101         }
1102         return 0;
1103 }
1104
1105 #ifdef LDAP_R_COMPILE
1106 #define LDAP_DEBUG_R_SASL
1107 void *ldap_pvt_sasl_mutex_new(void)
1108 {
1109         ldap_pvt_thread_mutex_t *mutex;
1110
1111         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1112                 sizeof(ldap_pvt_thread_mutex_t) );
1113
1114         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1115                 return mutex;
1116         }
1117 #ifndef LDAP_DEBUG_R_SASL
1118         assert( 0 );
1119 #endif /* !LDAP_DEBUG_R_SASL */
1120         return NULL;
1121 }
1122
1123 int ldap_pvt_sasl_mutex_lock(void *mutex)
1124 {
1125 #ifdef LDAP_DEBUG_R_SASL
1126         if ( mutex == NULL ) {
1127                 return SASL_OK;
1128         }
1129 #else /* !LDAP_DEBUG_R_SASL */
1130         assert( mutex != NULL );
1131 #endif /* !LDAP_DEBUG_R_SASL */
1132         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1133                 ? SASL_FAIL : SASL_OK;
1134 }
1135
1136 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1137 {
1138 #ifdef LDAP_DEBUG_R_SASL
1139         if ( mutex == NULL ) {
1140                 return SASL_OK;
1141         }
1142 #else /* !LDAP_DEBUG_R_SASL */
1143         assert( mutex != NULL );
1144 #endif /* !LDAP_DEBUG_R_SASL */
1145         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1146                 ? SASL_FAIL : SASL_OK;
1147 }
1148
1149 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1150 {
1151 #ifdef LDAP_DEBUG_R_SASL
1152         if ( mutex == NULL ) {
1153                 return;
1154         }
1155 #else /* !LDAP_DEBUG_R_SASL */
1156         assert( mutex != NULL );
1157 #endif /* !LDAP_DEBUG_R_SASL */
1158         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1159         LDAP_FREE( mutex );
1160 }
1161 #endif
1162
1163 #else
1164 int ldap_int_sasl_init( void )
1165 { return LDAP_SUCCESS; }
1166
1167 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1168 { return LDAP_SUCCESS; }
1169
1170 int
1171 ldap_int_sasl_bind(
1172         LDAP                    *ld,
1173         const char              *dn,
1174         const char              *mechs,
1175         LDAPControl             **sctrls,
1176         LDAPControl             **cctrls,
1177         unsigned                flags,
1178         LDAP_SASL_INTERACT_PROC *interact,
1179         void * defaults )
1180 { return LDAP_NOT_SUPPORTED; }
1181
1182 int
1183 ldap_int_sasl_external(
1184         LDAP *ld,
1185         LDAPConn *conn,
1186         const char * authid,
1187         ber_len_t ssf )
1188 { return LDAP_SUCCESS; }
1189
1190 #endif /* HAVE_CYRUS_SASL */