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 1998-2008 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 = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
 450                         "localhost" );
 451                 rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
 452                 LDAP_FREE( saslhost );
 453         }
 454
 455         if ( rc != LDAP_SUCCESS ) return rc;
 456
 457         ctx = ld->ld_defconn->lconn_sasl_authctx;
 458
 459         /* Check for TLS */
 460         ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
 461         if ( ssl ) {
 462                 struct berval authid = BER_BVNULL;
 463                 ber_len_t fac;
 464
 465                 fac = ldap_pvt_tls_get_strength( ssl );
 466                 /* failure is OK, we just can't use SASL EXTERNAL */
 467                 (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 468
 469                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 470                 LDAP_FREE( authid.bv_val );
 471         }
 472
 473 #if !defined(_WIN32)
 474         /* Check for local */
 475         if ( ldap_pvt_url_scheme2proto(
 476                 ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 477         {
 478                 char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 479                         "cn=peercred,cn=external,cn=auth")];
 480                 sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 481                         "cn=peercred,cn=external,cn=auth",
 482                         getegid(), geteuid() );
 483                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 484                         LDAP_PVT_SASL_LOCAL_SSF );
 485         }
 486 #endif
 487
 488         /* (re)set security properties */
 489         sasl_setprop( ctx, SASL_SEC_PROPS,
 490                 &ld->ld_options.ldo_sasl_secprops );
 491
 492         ccred.bv_val = NULL;
 493         ccred.bv_len = 0;
 494
 495         do {
 496                 saslrc = sasl_client_start( ctx,
 497                         mechs,
 498 #if SASL_VERSION_MAJOR < 2
 499                         NULL,
 500 #endif
 501                         &prompts,
 502                         (SASL_CONST char **)&ccred.bv_val,
 503                         &credlen,
 504                         &mech );
 505
 506                 if( pmech == NULL && mech != NULL ) {
 507                         pmech = mech;
 508
 509                         if( flags != LDAP_SASL_QUIET ) {
 510                                 fprintf(stderr,
 511                                         "SASL/%s authentication started\n",
 512                                         pmech );
 513                         }
 514                 }
 515
 516                 if( saslrc == SASL_INTERACT ) {
 517                         int res;
 518                         if( !interact ) break;
 519                         res = (interact)( ld, flags, defaults, prompts );
 520
 521                         if( res != LDAP_SUCCESS ) break;
 522                 }
 523         } while ( saslrc == SASL_INTERACT );
 524
 525         ccred.bv_len = credlen;
 526
 527         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 528                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 529 #if SASL_VERSION_MAJOR >= 2
 530                 if ( ld->ld_error ) {
 531                         LDAP_FREE( ld->ld_error );
 532                 }
 533                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 534 #endif
 535                 goto done;
 536         }
 537
 538         do {
 539                 struct berval *scred;
 540                 unsigned credlen;
 541
 542                 scred = NULL;
 543
 544                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls,
 545                         &scred );
 546
 547                 if ( ccred.bv_val != NULL ) {
 548 #if SASL_VERSION_MAJOR < 2
 549                         LDAP_FREE( ccred.bv_val );
 550 #endif
 551                         ccred.bv_val = NULL;
 552                 }
 553
 554                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 555                         if( scred ) {
 556                                 /* and server provided us with data? */
 557                                 Debug( LDAP_DEBUG_TRACE,
 558                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 559                                         rc, saslrc, scred ? (long) scred->bv_len : -1L );
 560                                 ber_bvfree( scred );
 561                                 scred = NULL;
 562                         }
 563                         rc = ld->ld_errno;
 564                         goto done;
 565                 }
 566
 567                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 568                         /* we're done, no need to step */
 569                         if( scred ) {
 570                                 /* but we got additional data? */
 571 #define KLUDGE_FOR_MSAD
 572 #ifdef  KLUDGE_FOR_MSAD
 573                                 /*
 574                                  * MSAD provides empty additional data in violation of LDAP
 575                                  * technical specifications.  As no existing SASL mechanism
 576                                  * allows empty data with an outcome message, just ignore it
 577                                  * for now.  Hopefully MS will fix their bug before someone
 578                                  * defines a mechanism with possibly empty additional data.
 579                                  */
 580                                 if( scred->bv_len == 0 ) {
 581                                         Debug( LDAP_DEBUG_ANY,
 582                                                 "ldap_int_sasl_bind: ignoring "
 583                                                         " bogus empty data provided with SASL outcome message.\n",
 584                                                 rc, saslrc, scred->bv_len );
 585                                         ber_bvfree( scred );
 586                                 } else
 587 #endif
 588                                 {
 589                                         Debug( LDAP_DEBUG_TRACE,
 590                                                 "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 591                                                 rc, saslrc, scred->bv_len );
 592                                         rc = ld->ld_errno = LDAP_LOCAL_ERROR;
 593                                         ber_bvfree( scred );
 594                                         goto done;
 595                                 }
 596                         }
 597                         break;
 598                 }
 599
 600                 do {
 601                         if( ! scred ) {
 602                                 /* no data! */
 603                                 Debug( LDAP_DEBUG_TRACE,
 604                                         "ldap_int_sasl_bind: no data in step!\n",
 605                                         0, 0, 0 );
 606                         }
 607
 608                         saslrc = sasl_client_step( ctx,
 609                                 (scred == NULL) ? NULL : scred->bv_val,
 610                                 (scred == NULL) ? 0 : scred->bv_len,
 611                                 &prompts,
 612                                 (SASL_CONST char **)&ccred.bv_val,
 613                                 &credlen );
 614
 615                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 616                                 saslrc, 0, 0 );
 617
 618                         if( saslrc == SASL_INTERACT ) {
 619                                 int res;
 620                                 if( !interact ) break;
 621                                 res = (interact)( ld, flags, defaults, prompts );
 622                                 if( res != LDAP_SUCCESS ) break;
 623                         }
 624                 } while ( saslrc == SASL_INTERACT );
 625
 626                 ccred.bv_len = credlen;
 627                 ber_bvfree( scred );
 628
 629                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 630                         ld->ld_errno = sasl_err2ldap( saslrc );
 631 #if SASL_VERSION_MAJOR >= 2
 632                         if ( ld->ld_error ) {
 633                                 LDAP_FREE( ld->ld_error );
 634                         }
 635                         ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 636 #endif
 637                         rc = ld->ld_errno;
 638                         goto done;
 639                 }
 640         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 641
 642         if ( rc != LDAP_SUCCESS ) goto done;
 643
 644         if ( saslrc != SASL_OK ) {
 645 #if SASL_VERSION_MAJOR >= 2
 646                 if ( ld->ld_error ) {
 647                         LDAP_FREE( ld->ld_error );
 648                 }
 649                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 650 #endif
 651                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 652                 goto done;
 653         }
 654
 655         if( flags != LDAP_SASL_QUIET ) {
 656                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 657                         (SASL_CONST void **)(char *) &data );
 658                 if( saslrc == SASL_OK && data && *data ) {
 659                         fprintf( stderr, "SASL username: %s\n", data );
 660                 }
 661
 662 #if SASL_VERSION_MAJOR < 2
 663                 saslrc = sasl_getprop( ctx, SASL_REALM,
 664                         (SASL_CONST void **) &data );
 665                 if( saslrc == SASL_OK && data && *data ) {
 666                         fprintf( stderr, "SASL realm: %s\n", data );
 667                 }
 668 #endif
 669         }
 670
 671         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 672         if( saslrc == SASL_OK ) {
 673                 if( flags != LDAP_SASL_QUIET ) {
 674                         fprintf( stderr, "SASL SSF: %lu\n",
 675                                 (unsigned long) *ssf );
 676                 }
 677
 678                 if( ssf && *ssf ) {
 679                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 680                                 oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 681                                 sasl_dispose( &oldctx );
 682                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 683                         }
 684                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 685                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 686
 687                         if( flags != LDAP_SASL_QUIET ) {
 688                                 fprintf( stderr, "SASL data security layer installed.\n" );
 689                         }
 690                 }
 691         }
 692         ld->ld_defconn->lconn_sasl_authctx = ctx;
 693
 694 done:
 695         return rc;
 696 }
 697
 698 int
 699 ldap_int_sasl_external(
 700         LDAP *ld,
 701         LDAPConn *conn,
 702         const char * authid,
 703         ber_len_t ssf )
 704 {
 705         int sc;
 706         sasl_conn_t *ctx;
 707 #if SASL_VERSION_MAJOR < 2
 708         sasl_external_properties_t extprops;
 709 #else
 710         sasl_ssf_t sasl_ssf = ssf;
 711 #endif
 712
 713         ctx = conn->lconn_sasl_authctx;
 714
 715         if ( ctx == NULL ) {
 716                 return LDAP_LOCAL_ERROR;
 717         }
 718
 719 #if SASL_VERSION_MAJOR >= 2
 720         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 721         if ( sc == SASL_OK )
 722                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 723 #else
 724         memset( &extprops, '\0', sizeof(extprops) );
 725         extprops.ssf = ssf;
 726         extprops.auth_id = (char *) authid;
 727
 728         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 729                 (void *) &extprops );
 730 #endif
 731
 732         if ( sc != SASL_OK ) {
 733                 return LDAP_LOCAL_ERROR;
 734         }
 735
 736         return LDAP_SUCCESS;
 737 }
 738
 739
 740 #define GOT_MINSSF      1
 741 #define GOT_MAXSSF      2
 742 #define GOT_MAXBUF      4
 743
 744 static struct {
 745         struct berval key;
 746         int sflag;
 747         int ival;
 748         int idef;
 749 } sprops[] = {
 750         { BER_BVC("none"), 0, 0, 0 },
 751         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 752         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 753         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 754         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 755         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 756         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 757         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 758         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 759         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 760         { BER_BVNULL, 0, 0, 0 }
 761 };
 762
 763 void ldap_pvt_sasl_secprops_unparse(
 764         sasl_security_properties_t *secprops,
 765         struct berval *out )
 766 {
 767         int i, l = 0;
 768         int comma;
 769         char *ptr;
 770
 771         if ( secprops == NULL || out == NULL ) {
 772                 return;
 773         }
 774
 775         comma = 0;
 776         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 777                 if ( sprops[i].ival ) {
 778                         int v = 0;
 779
 780                         switch( sprops[i].ival ) {
 781                         case GOT_MINSSF: v = secprops->min_ssf; break;
 782                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 783                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 784                         }
 785                         /* It is the default, ignore it */
 786                         if ( v == sprops[i].idef ) continue;
 787
 788                         l += sprops[i].key.bv_len + 24;
 789                 } else if ( sprops[i].sflag ) {
 790                         if ( sprops[i].sflag & secprops->security_flags ) {
 791                                 l += sprops[i].key.bv_len;
 792                         }
 793                 } else if ( secprops->security_flags == 0 ) {
 794                         l += sprops[i].key.bv_len;
 795                 }
 796                 if ( comma ) l++;
 797                 comma = 1;
 798         }
 799         l++;
 800
 801         out->bv_val = LDAP_MALLOC( l );
 802         if ( out->bv_val == NULL ) {
 803                 out->bv_len = 0;
 804                 return;
 805         }
 806
 807         ptr = out->bv_val;
 808         comma = 0;
 809         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 810                 if ( sprops[i].ival ) {
 811                         int v = 0;
 812
 813                         switch( sprops[i].ival ) {
 814                         case GOT_MINSSF: v = secprops->min_ssf; break;
 815                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 816                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 817                         }
 818                         /* It is the default, ignore it */
 819                         if ( v == sprops[i].idef ) continue;
 820
 821                         if ( comma ) *ptr++ = ',';
 822                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 823                         comma = 1;
 824                 } else if ( sprops[i].sflag ) {
 825                         if ( sprops[i].sflag & secprops->security_flags ) {
 826                                 if ( comma ) *ptr++ = ',';
 827                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 828                                 comma = 1;
 829                         }
 830                 } else if ( secprops->security_flags == 0 ) {
 831                         if ( comma ) *ptr++ = ',';
 832                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 833                         comma = 1;
 834                 }
 835         }
 836         out->bv_len = ptr - out->bv_val;
 837 }
 838
 839 int ldap_pvt_sasl_secprops(
 840         const char *in,
 841         sasl_security_properties_t *secprops )
 842 {
 843         unsigned i, j, l;
 844         char **props;
 845         unsigned sflags = 0;
 846         int got_sflags = 0;
 847         sasl_ssf_t max_ssf = 0;
 848         int got_max_ssf = 0;
 849         sasl_ssf_t min_ssf = 0;
 850         int got_min_ssf = 0;
 851         unsigned maxbufsize = 0;
 852         int got_maxbufsize = 0;
 853
 854         if( secprops == NULL ) {
 855                 return LDAP_PARAM_ERROR;
 856         }
 857         props = ldap_str2charray( in, "," );
 858         if( props == NULL ) {
 859                 return LDAP_PARAM_ERROR;
 860         }
 861
 862         for( i=0; props[i]; i++ ) {
 863                 l = strlen( props[i] );
 864                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 865                         if ( l < sprops[j].key.bv_len ) continue;
 866                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 867                                 sprops[j].key.bv_len )) continue;
 868                         if ( sprops[j].ival ) {
 869                                 unsigned v;
 870                                 char *next = NULL;
 871                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 872                                         continue;
 873                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 874                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 875                                 switch( sprops[j].ival ) {
 876                                 case GOT_MINSSF:
 877                                         min_ssf = v; got_min_ssf++; break;
 878                                 case GOT_MAXSSF:
 879                                         max_ssf = v; got_max_ssf++; break;
 880                                 case GOT_MAXBUF:
 881                                         maxbufsize = v; got_maxbufsize++; break;
 882                                 }
 883                         } else {
 884                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 885                                 if ( sprops[j].sflag )
 886                                         sflags |= sprops[j].sflag;
 887                                 else
 888                                         sflags = 0;
 889                                 got_sflags++;
 890                         }
 891                         break;
 892                 }
 893                 if ( BER_BVISNULL( &sprops[j].key )) {
 894                         ldap_charray_free( props );
 895                         return LDAP_NOT_SUPPORTED;
 896                 }
 897         }
 898
 899         if(got_sflags) {
 900                 secprops->security_flags = sflags;
 901         }
 902         if(got_min_ssf) {
 903                 secprops->min_ssf = min_ssf;
 904         }
 905         if(got_max_ssf) {
 906                 secprops->max_ssf = max_ssf;
 907         }
 908         if(got_maxbufsize) {
 909                 secprops->maxbufsize = maxbufsize;
 910         }
 911
 912         ldap_charray_free( props );
 913         return LDAP_SUCCESS;
 914 }
 915
 916 int
 917 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 918 {
 919         int rc;
 920
 921         switch( option ) {
 922         case LDAP_OPT_X_SASL_SECPROPS:
 923                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 924                 if( rc == LDAP_SUCCESS ) return 0;
 925         }
 926
 927         return -1;
 928 }
 929
 930 int
 931 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 932 {
 933         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 934                 if ( ldap_int_sasl_init() )
 935                         return -1;
 936                 *(char ***)arg = (char **)sasl_global_listmech();
 937                 return 0;
 938         }
 939
 940         if ( ld == NULL )
 941                 return -1;
 942
 943         switch ( option ) {
 944                 case LDAP_OPT_X_SASL_MECH: {
 945                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 946                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 947                 } break;
 948                 case LDAP_OPT_X_SASL_REALM: {
 949                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 950                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 951                 } break;
 952                 case LDAP_OPT_X_SASL_AUTHCID: {
 953                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 954                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 955                 } break;
 956                 case LDAP_OPT_X_SASL_AUTHZID: {
 957                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 958                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 959                 } break;
 960
 961                 case LDAP_OPT_X_SASL_SSF: {
 962                         int sc;
 963                         sasl_ssf_t      *ssf;
 964                         sasl_conn_t *ctx;
 965
 966                         if( ld->ld_defconn == NULL ) {
 967                                 return -1;
 968                         }
 969
 970                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 971
 972                         if ( ctx == NULL ) {
 973                                 return -1;
 974                         }
 975
 976                         sc = sasl_getprop( ctx, SASL_SSF,
 977                                 (SASL_CONST void **)(char *) &ssf );
 978
 979                         if ( sc != SASL_OK ) {
 980                                 return -1;
 981                         }
 982
 983                         *(ber_len_t *)arg = *ssf;
 984                 } break;
 985
 986                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 987                         /* this option is write only */
 988                         return -1;
 989
 990                 case LDAP_OPT_X_SASL_SSF_MIN:
 991                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 992                         break;
 993                 case LDAP_OPT_X_SASL_SSF_MAX:
 994                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 995                         break;
 996                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 997                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 998                         break;
 999
1000                 case LDAP_OPT_X_SASL_SECPROPS:
1001                         /* this option is write only */
1002                         return -1;
1003
1004                 default:
1005                         return -1;
1006         }
1007         return 0;
1008 }
1009
1010 int
1011 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1012 {
1013         if ( ld == NULL || arg == NULL )
1014                 return -1;
1015
1016         switch ( option ) {
1017         case LDAP_OPT_X_SASL_SSF:
1018                 /* This option is read-only */
1019                 return -1;
1020
1021         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1022                 int sc;
1023 #if SASL_VERSION_MAJOR < 2
1024                 sasl_external_properties_t extprops;
1025 #else
1026                 sasl_ssf_t sasl_ssf;
1027 #endif
1028                 sasl_conn_t *ctx;
1029
1030                 if( ld->ld_defconn == NULL ) {
1031                         return -1;
1032                 }
1033
1034                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1035
1036                 if ( ctx == NULL ) {
1037                         return -1;
1038                 }
1039
1040 #if SASL_VERSION_MAJOR >= 2
1041                 sasl_ssf = * (ber_len_t *)arg;
1042                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1043 #else
1044                 memset(&extprops, 0L, sizeof(extprops));
1045
1046                 extprops.ssf = * (ber_len_t *) arg;
1047
1048                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1049                         (void *) &extprops );
1050 #endif
1051
1052                 if ( sc != SASL_OK ) {
1053                         return -1;
1054                 }
1055                 } break;
1056
1057         case LDAP_OPT_X_SASL_SSF_MIN:
1058                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1059                 break;
1060         case LDAP_OPT_X_SASL_SSF_MAX:
1061                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1062                 break;
1063         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1064                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1065                 break;
1066
1067         case LDAP_OPT_X_SASL_SECPROPS: {
1068                 int sc;
1069                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1070                         &ld->ld_options.ldo_sasl_secprops );
1071
1072                 return sc == LDAP_SUCCESS ? 0 : -1;
1073                 }
1074
1075         default:
1076                 return -1;
1077         }
1078         return 0;
1079 }
1080
1081 #ifdef LDAP_R_COMPILE
1082 #define LDAP_DEBUG_R_SASL
1083 void *ldap_pvt_sasl_mutex_new(void)
1084 {
1085         ldap_pvt_thread_mutex_t *mutex;
1086
1087         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1088                 sizeof(ldap_pvt_thread_mutex_t) );
1089
1090         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1091                 return mutex;
1092         }
1093 #ifndef LDAP_DEBUG_R_SASL
1094         assert( 0 );
1095 #endif /* !LDAP_DEBUG_R_SASL */
1096         return NULL;
1097 }
1098
1099 int ldap_pvt_sasl_mutex_lock(void *mutex)
1100 {
1101 #ifdef LDAP_DEBUG_R_SASL
1102         if ( mutex == NULL ) {
1103                 return SASL_OK;
1104         }
1105 #else /* !LDAP_DEBUG_R_SASL */
1106         assert( mutex != NULL );
1107 #endif /* !LDAP_DEBUG_R_SASL */
1108         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1109                 ? SASL_FAIL : SASL_OK;
1110 }
1111
1112 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1113 {
1114 #ifdef LDAP_DEBUG_R_SASL
1115         if ( mutex == NULL ) {
1116                 return SASL_OK;
1117         }
1118 #else /* !LDAP_DEBUG_R_SASL */
1119         assert( mutex != NULL );
1120 #endif /* !LDAP_DEBUG_R_SASL */
1121         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1122                 ? SASL_FAIL : SASL_OK;
1123 }
1124
1125 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1126 {
1127 #ifdef LDAP_DEBUG_R_SASL
1128         if ( mutex == NULL ) {
1129                 return;
1130         }
1131 #else /* !LDAP_DEBUG_R_SASL */
1132         assert( mutex != NULL );
1133 #endif /* !LDAP_DEBUG_R_SASL */
1134         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1135         LDAP_FREE( mutex );
1136 }
1137 #endif
1138
1139 #else
1140 int ldap_int_sasl_init( void )
1141 { return LDAP_SUCCESS; }
1142
1143 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1144 { return LDAP_SUCCESS; }
1145
1146 int
1147 ldap_int_sasl_bind(
1148         LDAP                    *ld,
1149         const char              *dn,
1150         const char              *mechs,
1151         LDAPControl             **sctrls,
1152         LDAPControl             **cctrls,
1153         unsigned                flags,
1154         LDAP_SASL_INTERACT_PROC *interact,
1155         void * defaults )
1156 { return LDAP_NOT_SUPPORTED; }
1157
1158 int
1159 ldap_int_sasl_external(
1160         LDAP *ld,
1161         LDAPConn *conn,
1162         const char * authid,
1163         ber_len_t ssf )
1164 { return LDAP_SUCCESS; }
1165
1166 #endif /* HAVE_CYRUS_SASL */