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 1998-2012 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         LDAPMessage             *result,
 391         const char              **rmech,
 392         int                             *msgid )
 393 {
 394         const char              *mech;
 395         sasl_ssf_t              *ssf;
 396         sasl_conn_t             *ctx;
 397         sasl_interact_t *prompts = NULL;
 398         struct berval   ccred = BER_BVNULL;
 399         int saslrc, rc;
 400         unsigned credlen;
 401
 402         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 403                 mechs ? mechs : "<null>", 0, 0 );
 404
 405         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 406         if (ld->ld_version < LDAP_VERSION3) {
 407                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 408                 return ld->ld_errno;
 409         }
 410
 411         /* Starting a Bind */
 412         if ( !result ) {
 413                 const char *pmech = NULL;
 414                 sasl_conn_t     *oldctx;
 415                 ber_socket_t            sd;
 416                 void    *ssl;
 417
 418                 rc = 0;
 419                 LDAP_MUTEX_LOCK( &ld->ld_conn_mutex );
 420                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 421
 422                 if ( sd == AC_SOCKET_INVALID || !ld->ld_defconn ) {
 423                         /* not connected yet */
 424
 425                         rc = ldap_open_defconn( ld );
 426
 427                         if ( rc == 0 ) {
 428                                 ber_sockbuf_ctrl( ld->ld_defconn->lconn_sb,
 429                                         LBER_SB_OPT_GET_FD, &sd );
 430
 431                                 if( sd == AC_SOCKET_INVALID ) {
 432                                         ld->ld_errno = LDAP_LOCAL_ERROR;
 433                                         rc = ld->ld_errno;
 434                                 }
 435                         }
 436                 }
 437                 if ( rc == 0 && ld->ld_defconn &&
 438                         ld->ld_defconn->lconn_status == LDAP_CONNST_CONNECTING ) {
 439                         rc = ldap_int_check_async_open( ld, sd );
 440                 }
 441                 LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
 442                 if( rc != 0 ) return ld->ld_errno;
 443
 444                 oldctx = ld->ld_defconn->lconn_sasl_authctx;
 445
 446                 /* If we already have an authentication context, clear it out */
 447                 if( oldctx ) {
 448                         if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
 449                                 sasl_dispose( &oldctx );
 450                         }
 451                         ld->ld_defconn->lconn_sasl_authctx = NULL;
 452                 }
 453
 454                 {
 455                         char *saslhost;
 456                         int nocanon = (int)LDAP_BOOL_GET( &ld->ld_options,
 457                                 LDAP_BOOL_SASL_NOCANON );
 458
 459                         /* If we don't need to canonicalize just use the host
 460                          * from the LDAP URI.
 461                          */
 462                         if ( nocanon )
 463                                 saslhost = ld->ld_defconn->lconn_server->lud_host;
 464                         else
 465                                 saslhost = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
 466                                 "localhost" );
 467                         rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
 468                         if ( !nocanon )
 469                                 LDAP_FREE( saslhost );
 470                 }
 471
 472                 if ( rc != LDAP_SUCCESS ) return rc;
 473
 474                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 475
 476 #ifdef HAVE_TLS
 477                 /* Check for TLS */
 478                 ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
 479                 if ( ssl ) {
 480                         struct berval authid = BER_BVNULL;
 481                         ber_len_t fac;
 482
 483                         fac = ldap_pvt_tls_get_strength( ssl );
 484                         /* failure is OK, we just can't use SASL EXTERNAL */
 485                         (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 486
 487                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 488                         LDAP_FREE( authid.bv_val );
 489                 }
 490 #endif
 491
 492 #if !defined(_WIN32)
 493                 /* Check for local */
 494                 if ( ldap_pvt_url_scheme2proto(
 495                         ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 496                 {
 497                         char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 498                                 "cn=peercred,cn=external,cn=auth")];
 499                         sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 500                                 "cn=peercred,cn=external,cn=auth",
 501                                 getegid(), geteuid() );
 502                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 503                                 LDAP_PVT_SASL_LOCAL_SSF );
 504                 }
 505 #endif
 506
 507                 /* (re)set security properties */
 508                 sasl_setprop( ctx, SASL_SEC_PROPS,
 509                         &ld->ld_options.ldo_sasl_secprops );
 510
 511                 mech = NULL;
 512
 513                 do {
 514                         saslrc = sasl_client_start( ctx,
 515                                 mechs,
 516 #if SASL_VERSION_MAJOR < 2
 517                                 NULL,
 518 #endif
 519                                 &prompts,
 520                                 (SASL_CONST char **)&ccred.bv_val,
 521                                 &credlen,
 522                                 &mech );
 523
 524                         if( pmech == NULL && mech != NULL ) {
 525                                 pmech = mech;
 526                                 *rmech = mech;
 527
 528                                 if( flags != LDAP_SASL_QUIET ) {
 529                                         fprintf(stderr,
 530                                                 "SASL/%s authentication started\n",
 531                                                 pmech );
 532                                 }
 533                         }
 534
 535                         if( saslrc == SASL_INTERACT ) {
 536                                 int res;
 537                                 if( !interact ) break;
 538                                 res = (interact)( ld, flags, defaults, prompts );
 539
 540                                 if( res != LDAP_SUCCESS ) break;
 541                         }
 542                 } while ( saslrc == SASL_INTERACT );
 543                 rc = LDAP_SASL_BIND_IN_PROGRESS;
 544
 545         } else {
 546                 /* continuing an in-progress Bind */
 547                 struct berval *scred = NULL;
 548
 549                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 550
 551                 rc = ldap_parse_sasl_bind_result( ld, result, &scred, 0 );
 552                 if ( rc != LDAP_SUCCESS )
 553                         goto done;
 554
 555                 rc = ldap_result2error( ld, result, 0 );
 556                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 557                         if( scred ) {
 558                                 /* and server provided us with data? */
 559                                 Debug( LDAP_DEBUG_TRACE,
 560                                         "ldap_int_sasl_bind: rc=%d len=%ld\n",
 561                                         rc, scred ? (long) scred->bv_len : -1L, 0 );
 562                                 ber_bvfree( scred );
 563                                 scred = NULL;
 564                         }
 565                         goto done;
 566                 }
 567
 568                 mech = *rmech;
 569                 if ( rc == LDAP_SUCCESS && mech == NULL )
 570                         goto success;
 571
 572                 do {
 573                         if( ! scred ) {
 574                                 /* no data! */
 575                                 Debug( LDAP_DEBUG_TRACE,
 576                                         "ldap_int_sasl_bind: no data in step!\n",
 577                                         0, 0, 0 );
 578                         }
 579
 580                         saslrc = sasl_client_step( ctx,
 581                                 (scred == NULL) ? NULL : scred->bv_val,
 582                                 (scred == NULL) ? 0 : scred->bv_len,
 583                                 &prompts,
 584                                 (SASL_CONST char **)&ccred.bv_val,
 585                                 &credlen );
 586
 587                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 588                                 saslrc, 0, 0 );
 589
 590                         if( saslrc == SASL_INTERACT ) {
 591                                 int res;
 592                                 if( !interact ) break;
 593                                 res = (interact)( ld, flags, defaults, prompts );
 594                                 if( res != LDAP_SUCCESS ) break;
 595                         }
 596                 } while ( saslrc == SASL_INTERACT );
 597
 598                 ber_bvfree( scred );
 599         }
 600
 601         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 602                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 603 #if SASL_VERSION_MAJOR >= 2
 604                 if ( ld->ld_error ) {
 605                         LDAP_FREE( ld->ld_error );
 606                 }
 607                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 608 #endif
 609                 goto done;
 610         }
 611
 612         if ( saslrc == SASL_OK )
 613                 *rmech = NULL;
 614
 615         ccred.bv_len = credlen;
 616
 617         if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
 618                 rc = ldap_sasl_bind( ld, dn, mech, &ccred, sctrls, cctrls, msgid );
 619
 620                 if ( ccred.bv_val != NULL ) {
 621 #if SASL_VERSION_MAJOR < 2
 622                         LDAP_FREE( ccred.bv_val );
 623 #endif
 624                         ccred.bv_val = NULL;
 625                 }
 626                 if ( rc == LDAP_SUCCESS )
 627                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 628                 goto done;
 629         }
 630
 631 success:
 632         /* Conversation was completed successfully by now */
 633         if( flags != LDAP_SASL_QUIET ) {
 634                 char *data;
 635                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 636                         (SASL_CONST void **)(char *) &data );
 637                 if( saslrc == SASL_OK && data && *data ) {
 638                         fprintf( stderr, "SASL username: %s\n", data );
 639                 }
 640
 641 #if SASL_VERSION_MAJOR < 2
 642                 saslrc = sasl_getprop( ctx, SASL_REALM,
 643                         (SASL_CONST void **) &data );
 644                 if( saslrc == SASL_OK && data && *data ) {
 645                         fprintf( stderr, "SASL realm: %s\n", data );
 646                 }
 647 #endif
 648         }
 649
 650         ssf = NULL;
 651         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 652         if( saslrc == SASL_OK ) {
 653                 if( flags != LDAP_SASL_QUIET ) {
 654                         fprintf( stderr, "SASL SSF: %lu\n",
 655                                 (unsigned long) *ssf );
 656                 }
 657
 658                 if( ssf && *ssf ) {
 659                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 660                                 sasl_conn_t     *oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 661                                 sasl_dispose( &oldctx );
 662                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 663                         }
 664                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 665                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 666
 667                         if( flags != LDAP_SASL_QUIET ) {
 668                                 fprintf( stderr, "SASL data security layer installed.\n" );
 669                         }
 670                 }
 671         }
 672         ld->ld_defconn->lconn_sasl_authctx = ctx;
 673
 674 done:
 675         return rc;
 676 }
 677
 678 int
 679 ldap_int_sasl_external(
 680         LDAP *ld,
 681         LDAPConn *conn,
 682         const char * authid,
 683         ber_len_t ssf )
 684 {
 685         int sc;
 686         sasl_conn_t *ctx;
 687 #if SASL_VERSION_MAJOR < 2
 688         sasl_external_properties_t extprops;
 689 #else
 690         sasl_ssf_t sasl_ssf = ssf;
 691 #endif
 692
 693         ctx = conn->lconn_sasl_authctx;
 694
 695         if ( ctx == NULL ) {
 696                 return LDAP_LOCAL_ERROR;
 697         }
 698
 699 #if SASL_VERSION_MAJOR >= 2
 700         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 701         if ( sc == SASL_OK )
 702                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 703 #else
 704         memset( &extprops, '\0', sizeof(extprops) );
 705         extprops.ssf = ssf;
 706         extprops.auth_id = (char *) authid;
 707
 708         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 709                 (void *) &extprops );
 710 #endif
 711
 712         if ( sc != SASL_OK ) {
 713                 return LDAP_LOCAL_ERROR;
 714         }
 715
 716         return LDAP_SUCCESS;
 717 }
 718
 719
 720 #define GOT_MINSSF      1
 721 #define GOT_MAXSSF      2
 722 #define GOT_MAXBUF      4
 723
 724 static struct {
 725         struct berval key;
 726         int sflag;
 727         int ival;
 728         int idef;
 729 } sprops[] = {
 730         { BER_BVC("none"), 0, 0, 0 },
 731         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 732         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 733         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 734         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 735         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 736         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 737         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 738         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 739         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 740         { BER_BVNULL, 0, 0, 0 }
 741 };
 742
 743 void ldap_pvt_sasl_secprops_unparse(
 744         sasl_security_properties_t *secprops,
 745         struct berval *out )
 746 {
 747         int i, l = 0;
 748         int comma;
 749         char *ptr;
 750
 751         if ( secprops == NULL || out == NULL ) {
 752                 return;
 753         }
 754
 755         comma = 0;
 756         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 757                 if ( sprops[i].ival ) {
 758                         int v = 0;
 759
 760                         switch( sprops[i].ival ) {
 761                         case GOT_MINSSF: v = secprops->min_ssf; break;
 762                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 763                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 764                         }
 765                         /* It is the default, ignore it */
 766                         if ( v == sprops[i].idef ) continue;
 767
 768                         l += sprops[i].key.bv_len + 24;
 769                 } else if ( sprops[i].sflag ) {
 770                         if ( sprops[i].sflag & secprops->security_flags ) {
 771                                 l += sprops[i].key.bv_len;
 772                         }
 773                 } else if ( secprops->security_flags == 0 ) {
 774                         l += sprops[i].key.bv_len;
 775                 }
 776                 if ( comma ) l++;
 777                 comma = 1;
 778         }
 779         l++;
 780
 781         out->bv_val = LDAP_MALLOC( l );
 782         if ( out->bv_val == NULL ) {
 783                 out->bv_len = 0;
 784                 return;
 785         }
 786
 787         ptr = out->bv_val;
 788         comma = 0;
 789         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 790                 if ( sprops[i].ival ) {
 791                         int v = 0;
 792
 793                         switch( sprops[i].ival ) {
 794                         case GOT_MINSSF: v = secprops->min_ssf; break;
 795                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 796                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 797                         }
 798                         /* It is the default, ignore it */
 799                         if ( v == sprops[i].idef ) continue;
 800
 801                         if ( comma ) *ptr++ = ',';
 802                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 803                         comma = 1;
 804                 } else if ( sprops[i].sflag ) {
 805                         if ( sprops[i].sflag & secprops->security_flags ) {
 806                                 if ( comma ) *ptr++ = ',';
 807                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 808                                 comma = 1;
 809                         }
 810                 } else if ( secprops->security_flags == 0 ) {
 811                         if ( comma ) *ptr++ = ',';
 812                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 813                         comma = 1;
 814                 }
 815         }
 816         out->bv_len = ptr - out->bv_val;
 817 }
 818
 819 int ldap_pvt_sasl_secprops(
 820         const char *in,
 821         sasl_security_properties_t *secprops )
 822 {
 823         unsigned i, j, l;
 824         char **props;
 825         unsigned sflags = 0;
 826         int got_sflags = 0;
 827         sasl_ssf_t max_ssf = 0;
 828         int got_max_ssf = 0;
 829         sasl_ssf_t min_ssf = 0;
 830         int got_min_ssf = 0;
 831         unsigned maxbufsize = 0;
 832         int got_maxbufsize = 0;
 833
 834         if( secprops == NULL ) {
 835                 return LDAP_PARAM_ERROR;
 836         }
 837         props = ldap_str2charray( in, "," );
 838         if( props == NULL ) {
 839                 return LDAP_PARAM_ERROR;
 840         }
 841
 842         for( i=0; props[i]; i++ ) {
 843                 l = strlen( props[i] );
 844                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 845                         if ( l < sprops[j].key.bv_len ) continue;
 846                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 847                                 sprops[j].key.bv_len )) continue;
 848                         if ( sprops[j].ival ) {
 849                                 unsigned v;
 850                                 char *next = NULL;
 851                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 852                                         continue;
 853                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 854                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 855                                 switch( sprops[j].ival ) {
 856                                 case GOT_MINSSF:
 857                                         min_ssf = v; got_min_ssf++; break;
 858                                 case GOT_MAXSSF:
 859                                         max_ssf = v; got_max_ssf++; break;
 860                                 case GOT_MAXBUF:
 861                                         maxbufsize = v; got_maxbufsize++; break;
 862                                 }
 863                         } else {
 864                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 865                                 if ( sprops[j].sflag )
 866                                         sflags |= sprops[j].sflag;
 867                                 else
 868                                         sflags = 0;
 869                                 got_sflags++;
 870                         }
 871                         break;
 872                 }
 873                 if ( BER_BVISNULL( &sprops[j].key )) {
 874                         ldap_charray_free( props );
 875                         return LDAP_NOT_SUPPORTED;
 876                 }
 877         }
 878
 879         if(got_sflags) {
 880                 secprops->security_flags = sflags;
 881         }
 882         if(got_min_ssf) {
 883                 secprops->min_ssf = min_ssf;
 884         }
 885         if(got_max_ssf) {
 886                 secprops->max_ssf = max_ssf;
 887         }
 888         if(got_maxbufsize) {
 889                 secprops->maxbufsize = maxbufsize;
 890         }
 891
 892         ldap_charray_free( props );
 893         return LDAP_SUCCESS;
 894 }
 895
 896 int
 897 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 898 {
 899         int rc;
 900
 901         switch( option ) {
 902         case LDAP_OPT_X_SASL_SECPROPS:
 903                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 904                 if( rc == LDAP_SUCCESS ) return 0;
 905         }
 906
 907         return -1;
 908 }
 909
 910 int
 911 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 912 {
 913         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 914                 if ( ldap_int_sasl_init() )
 915                         return -1;
 916                 *(char ***)arg = (char **)sasl_global_listmech();
 917                 return 0;
 918         }
 919
 920         if ( ld == NULL )
 921                 return -1;
 922
 923         switch ( option ) {
 924                 case LDAP_OPT_X_SASL_MECH: {
 925                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 926                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 927                 } break;
 928                 case LDAP_OPT_X_SASL_REALM: {
 929                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 930                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 931                 } break;
 932                 case LDAP_OPT_X_SASL_AUTHCID: {
 933                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 934                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 935                 } break;
 936                 case LDAP_OPT_X_SASL_AUTHZID: {
 937                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 938                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 939                 } break;
 940
 941                 case LDAP_OPT_X_SASL_SSF: {
 942                         int sc;
 943                         sasl_ssf_t      *ssf;
 944                         sasl_conn_t *ctx;
 945
 946                         if( ld->ld_defconn == NULL ) {
 947                                 return -1;
 948                         }
 949
 950                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 951
 952                         if ( ctx == NULL ) {
 953                                 return -1;
 954                         }
 955
 956                         sc = sasl_getprop( ctx, SASL_SSF,
 957                                 (SASL_CONST void **)(char *) &ssf );
 958
 959                         if ( sc != SASL_OK ) {
 960                                 return -1;
 961                         }
 962
 963                         *(ber_len_t *)arg = *ssf;
 964                 } break;
 965
 966                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 967                         /* this option is write only */
 968                         return -1;
 969
 970                 case LDAP_OPT_X_SASL_SSF_MIN:
 971                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 972                         break;
 973                 case LDAP_OPT_X_SASL_SSF_MAX:
 974                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 975                         break;
 976                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 977                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 978                         break;
 979                 case LDAP_OPT_X_SASL_NOCANON:
 980                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
 981                         break;
 982
 983                 case LDAP_OPT_X_SASL_USERNAME: {
 984                         int sc;
 985                         char *username;
 986                         sasl_conn_t *ctx;
 987
 988                         if( ld->ld_defconn == NULL ) {
 989                                 return -1;
 990                         }
 991
 992                         ctx = ld->ld_defconn->lconn_sasl_authctx;
 993
 994                         if ( ctx == NULL ) {
 995                                 return -1;
 996                         }
 997
 998                         sc = sasl_getprop( ctx, SASL_USERNAME,
 999                                 (SASL_CONST void **)(char **) &username );
1000
1001                         if ( sc != SASL_OK ) {
1002                                 return -1;
1003                         }
1004
1005                         *(char **)arg = username ? LDAP_STRDUP( username ) : NULL;
1006                 } break;
1007
1008                 case LDAP_OPT_X_SASL_SECPROPS:
1009                         /* this option is write only */
1010                         return -1;
1011
1012 #ifdef SASL_GSS_CREDS
1013                 case LDAP_OPT_X_SASL_GSS_CREDS: {
1014                         sasl_conn_t *ctx;
1015                         int sc;
1016
1017                         if ( ld->ld_defconn == NULL )
1018                                 return -1;
1019
1020                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1021                         if ( ctx == NULL )
1022                                 return -1;
1023
1024                         sc = sasl_getprop( ctx, SASL_GSS_CREDS, arg );
1025                         if ( sc != SASL_OK )
1026                                 return -1;
1027                         }
1028                         break;
1029 #endif
1030
1031                 default:
1032                         return -1;
1033         }
1034         return 0;
1035 }
1036
1037 int
1038 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1039 {
1040         if ( ld == NULL )
1041                 return -1;
1042
1043         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1044                 return -1;
1045
1046         switch ( option ) {
1047         case LDAP_OPT_X_SASL_SSF:
1048         case LDAP_OPT_X_SASL_USERNAME:
1049                 /* This option is read-only */
1050                 return -1;
1051
1052         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1053                 int sc;
1054 #if SASL_VERSION_MAJOR < 2
1055                 sasl_external_properties_t extprops;
1056 #else
1057                 sasl_ssf_t sasl_ssf;
1058 #endif
1059                 sasl_conn_t *ctx;
1060
1061                 if( ld->ld_defconn == NULL ) {
1062                         return -1;
1063                 }
1064
1065                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1066
1067                 if ( ctx == NULL ) {
1068                         return -1;
1069                 }
1070
1071 #if SASL_VERSION_MAJOR >= 2
1072                 sasl_ssf = * (ber_len_t *)arg;
1073                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1074 #else
1075                 memset(&extprops, 0L, sizeof(extprops));
1076
1077                 extprops.ssf = * (ber_len_t *) arg;
1078
1079                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1080                         (void *) &extprops );
1081 #endif
1082
1083                 if ( sc != SASL_OK ) {
1084                         return -1;
1085                 }
1086                 } break;
1087
1088         case LDAP_OPT_X_SASL_SSF_MIN:
1089                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1090                 break;
1091         case LDAP_OPT_X_SASL_SSF_MAX:
1092                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1093                 break;
1094         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1095                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1096                 break;
1097         case LDAP_OPT_X_SASL_NOCANON:
1098                 if ( arg == LDAP_OPT_OFF ) {
1099                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1100                 } else {
1101                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1102                 }
1103                 break;
1104
1105         case LDAP_OPT_X_SASL_SECPROPS: {
1106                 int sc;
1107                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1108                         &ld->ld_options.ldo_sasl_secprops );
1109
1110                 return sc == LDAP_SUCCESS ? 0 : -1;
1111                 }
1112
1113 #ifdef SASL_GSS_CREDS
1114         case LDAP_OPT_X_SASL_GSS_CREDS: {
1115                 sasl_conn_t *ctx;
1116                 int sc;
1117
1118                 if ( ld->ld_defconn == NULL )
1119                         return -1;
1120
1121                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1122                 if ( ctx == NULL )
1123                         return -1;
1124
1125                 sc = sasl_setprop( ctx, SASL_GSS_CREDS, arg );
1126                 if ( sc != SASL_OK )
1127                         return -1;
1128                 }
1129                 break;
1130 #endif
1131
1132         default:
1133                 return -1;
1134         }
1135         return 0;
1136 }
1137
1138 #ifdef LDAP_R_COMPILE
1139 #define LDAP_DEBUG_R_SASL
1140 void *ldap_pvt_sasl_mutex_new(void)
1141 {
1142         ldap_pvt_thread_mutex_t *mutex;
1143
1144         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1145                 sizeof(ldap_pvt_thread_mutex_t) );
1146
1147         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1148                 return mutex;
1149         }
1150 #ifndef LDAP_DEBUG_R_SASL
1151         assert( 0 );
1152 #endif /* !LDAP_DEBUG_R_SASL */
1153         return NULL;
1154 }
1155
1156 int ldap_pvt_sasl_mutex_lock(void *mutex)
1157 {
1158 #ifdef LDAP_DEBUG_R_SASL
1159         if ( mutex == NULL ) {
1160                 return SASL_OK;
1161         }
1162 #else /* !LDAP_DEBUG_R_SASL */
1163         assert( mutex != NULL );
1164 #endif /* !LDAP_DEBUG_R_SASL */
1165         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1166                 ? SASL_FAIL : SASL_OK;
1167 }
1168
1169 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1170 {
1171 #ifdef LDAP_DEBUG_R_SASL
1172         if ( mutex == NULL ) {
1173                 return SASL_OK;
1174         }
1175 #else /* !LDAP_DEBUG_R_SASL */
1176         assert( mutex != NULL );
1177 #endif /* !LDAP_DEBUG_R_SASL */
1178         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1179                 ? SASL_FAIL : SASL_OK;
1180 }
1181
1182 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1183 {
1184 #ifdef LDAP_DEBUG_R_SASL
1185         if ( mutex == NULL ) {
1186                 return;
1187         }
1188 #else /* !LDAP_DEBUG_R_SASL */
1189         assert( mutex != NULL );
1190 #endif /* !LDAP_DEBUG_R_SASL */
1191         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1192         LDAP_FREE( mutex );
1193 }
1194 #endif
1195
1196 #else
1197 int ldap_int_sasl_init( void )
1198 { return LDAP_SUCCESS; }
1199
1200 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1201 { return LDAP_SUCCESS; }
1202
1203 int
1204 ldap_int_sasl_bind(
1205         LDAP                    *ld,
1206         const char              *dn,
1207         const char              *mechs,
1208         LDAPControl             **sctrls,
1209         LDAPControl             **cctrls,
1210         unsigned                flags,
1211         LDAP_SASL_INTERACT_PROC *interact,
1212         void                    *defaults,
1213         LDAPMessage             *result,
1214         const char              **rmech,
1215         int                             *msgid )
1216 { return LDAP_NOT_SUPPORTED; }
1217
1218 int
1219 ldap_int_sasl_external(
1220         LDAP *ld,
1221         LDAPConn *conn,
1222         const char * authid,
1223         ber_len_t ssf )
1224 { return LDAP_SUCCESS; }
1225
1226 #endif /* HAVE_CYRUS_SASL */