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 1998-2015 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 HAVE_SASL_SASL_H
  45 #include <sasl/sasl.h>
  46 #else
  47 #include <sasl.h>
  48 #endif
  49
  50 #if SASL_VERSION_MAJOR >= 2
  51 #define SASL_CONST const
  52 #else
  53 #define SASL_CONST
  54 #endif
  55
  56 /*
  57 * Various Cyrus SASL related stuff.
  58 */
  59
  60 static const sasl_callback_t client_callbacks[] = {
  61 #ifdef SASL_CB_GETREALM
  62         { SASL_CB_GETREALM, NULL, NULL },
  63 #endif
  64         { SASL_CB_USER, NULL, NULL },
  65         { SASL_CB_AUTHNAME, NULL, NULL },
  66         { SASL_CB_PASS, NULL, NULL },
  67         { SASL_CB_ECHOPROMPT, NULL, NULL },
  68         { SASL_CB_NOECHOPROMPT, NULL, NULL },
  69         { SASL_CB_LIST_END, NULL, NULL }
  70 };
  71
  72 int ldap_int_sasl_init( void )
  73 {
  74         /* XXX not threadsafe */
  75         static int sasl_initialized = 0;
  76
  77 #ifdef HAVE_SASL_VERSION
  78         /* stringify the version number, sasl.h doesn't do it for us */
  79 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
  80 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
  81 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
  82                                 SASL_VERSION_STEP)
  83         { int rc;
  84         sasl_version( NULL, &rc );
  85         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
  86                 (rc & 0xffff) < SASL_VERSION_STEP) {
  87                 char version[sizeof("xxx.xxx.xxxxx")];
  88                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
  89                         rc & 0xffff );
  90
  91                 Debug( LDAP_DEBUG_ANY,
  92                 "ldap_int_sasl_init: SASL library version mismatch:"
  93                 " expected " SASL_VERSION_STRING ","
  94                 " got %s\n", version, 0, 0 );
  95                 return -1;
  96         }
  97         }
  98 #endif
  99         if ( sasl_initialized ) {
 100                 return 0;
 101         }
 102
 103 /* SASL 2 takes care of its own memory completely internally */
 104 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
 105         sasl_set_alloc(
 106                 ber_memalloc,
 107                 ber_memcalloc,
 108                 ber_memrealloc,
 109                 ber_memfree );
 110 #endif /* CSRIMALLOC */
 111
 112 #ifdef LDAP_R_COMPILE
 113         sasl_set_mutex(
 114                 ldap_pvt_sasl_mutex_new,
 115                 ldap_pvt_sasl_mutex_lock,
 116                 ldap_pvt_sasl_mutex_unlock,
 117                 ldap_pvt_sasl_mutex_dispose );
 118 #endif
 119
 120         if ( sasl_client_init( NULL ) == SASL_OK ) {
 121                 sasl_initialized = 1;
 122                 return 0;
 123         }
 124
 125 #if SASL_VERSION_MAJOR < 2
 126         /* A no-op to make sure we link with Cyrus 1.5 */
 127         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
 128 #endif
 129         return -1;
 130 }
 131
 132 static void
 133 sb_sasl_cyrus_init(
 134         struct sb_sasl_generic_data *p,
 135         ber_len_t *min_send,
 136         ber_len_t *max_send,
 137         ber_len_t *max_recv)
 138 {
 139         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 140         ber_len_t maxbuf;
 141
 142         sasl_getprop( sasl_context, SASL_MAXOUTBUF,
 143                       (SASL_CONST void **)(char *) &maxbuf );
 144
 145         *min_send = SASL_MIN_BUFF_SIZE;
 146         *max_send = maxbuf;
 147         *max_recv = SASL_MAX_BUFF_SIZE;
 148 }
 149
 150 static ber_int_t
 151 sb_sasl_cyrus_encode(
 152         struct sb_sasl_generic_data *p,
 153         unsigned char *buf,
 154         ber_len_t len,
 155         Sockbuf_Buf *dst)
 156 {
 157         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 158         ber_int_t ret;
 159         unsigned tmpsize = dst->buf_size;
 160
 161         ret = sasl_encode( sasl_context, (char *)buf, len,
 162                            (SASL_CONST char **)&dst->buf_base,
 163                            &tmpsize );
 164
 165         dst->buf_size = tmpsize;
 166         dst->buf_end = dst->buf_size;
 167
 168         if ( ret != SASL_OK ) {
 169                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
 170                                 "sb_sasl_cyrus_encode: failed to encode packet: %s\n",
 171                                 sasl_errstring( ret, NULL, NULL ) );
 172                 return -1;
 173         }
 174
 175         return 0;
 176 }
 177
 178 static ber_int_t
 179 sb_sasl_cyrus_decode(
 180         struct sb_sasl_generic_data *p,
 181         const Sockbuf_Buf *src,
 182         Sockbuf_Buf *dst)
 183 {
 184         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 185         ber_int_t ret;
 186         unsigned tmpsize = dst->buf_size;
 187
 188         ret = sasl_decode( sasl_context,
 189                            src->buf_base, src->buf_end,
 190                            (SASL_CONST char **)&dst->buf_base,
 191                            (unsigned *)&tmpsize );
 192
 193
 194         dst->buf_size = tmpsize;
 195         dst->buf_end = dst->buf_size;
 196
 197         if ( ret != SASL_OK ) {
 198                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
 199                                 "sb_sasl_cyrus_decode: failed to decode packet: %s\n",
 200                                 sasl_errstring( ret, NULL, NULL ) );
 201                 return -1;
 202         }
 203
 204         return 0;
 205 }
 206
 207 static void
 208 sb_sasl_cyrus_reset_buf(
 209         struct sb_sasl_generic_data *p,
 210         Sockbuf_Buf *buf)
 211 {
 212 #if SASL_VERSION_MAJOR >= 2
 213         ber_pvt_sb_buf_init( buf );
 214 #else
 215         ber_pvt_sb_buf_destroy( buf );
 216 #endif
 217 }
 218
 219 static void
 220 sb_sasl_cyrus_fini(
 221         struct sb_sasl_generic_data *p)
 222 {
 223 #if SASL_VERSION_MAJOR >= 2
 224         /*
 225          * SASLv2 encode/decode buffers are managed by
 226          * libsasl2. Ensure they are not freed by liblber.
 227          */
 228         p->buf_in.buf_base = NULL;
 229         p->buf_out.buf_base = NULL;
 230 #endif
 231 }
 232
 233 static const struct sb_sasl_generic_ops sb_sasl_cyrus_ops = {
 234         sb_sasl_cyrus_init,
 235         sb_sasl_cyrus_encode,
 236         sb_sasl_cyrus_decode,
 237         sb_sasl_cyrus_reset_buf,
 238         sb_sasl_cyrus_fini
 239  };
 240
 241 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 242 {
 243         struct sb_sasl_generic_install install_arg;
 244
 245         install_arg.ops         = &sb_sasl_cyrus_ops;
 246         install_arg.ops_private = ctx_arg;
 247
 248         return ldap_pvt_sasl_generic_install( sb, &install_arg );
 249 }
 250
 251 void ldap_pvt_sasl_remove( Sockbuf *sb )
 252 {
 253         ldap_pvt_sasl_generic_remove( sb );
 254 }
 255
 256 static int
 257 sasl_err2ldap( int saslerr )
 258 {
 259         int rc;
 260
 261         /* map SASL errors to LDAP API errors returned by:
 262          *      sasl_client_new()
 263          *              SASL_OK, SASL_NOMECH, SASL_NOMEM
 264          *      sasl_client_start()
 265          *              SASL_OK, SASL_NOMECH, SASL_NOMEM, SASL_INTERACT
 266          *      sasl_client_step()
 267          *              SASL_OK, SASL_INTERACT, SASL_BADPROT, SASL_BADSERV
 268          */
 269
 270         switch (saslerr) {
 271                 case SASL_CONTINUE:
 272                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 273                         break;
 274                 case SASL_INTERACT:
 275                         rc = LDAP_LOCAL_ERROR;
 276                         break;
 277                 case SASL_OK:
 278                         rc = LDAP_SUCCESS;
 279                         break;
 280                 case SASL_NOMEM:
 281                         rc = LDAP_NO_MEMORY;
 282                         break;
 283                 case SASL_NOMECH:
 284                         rc = LDAP_AUTH_UNKNOWN;
 285                         break;
 286                 case SASL_BADPROT:
 287                         rc = LDAP_DECODING_ERROR;
 288                         break;
 289                 case SASL_BADSERV:
 290                         rc = LDAP_AUTH_UNKNOWN;
 291                         break;
 292
 293                 /* other codes */
 294                 case SASL_BADAUTH:
 295                         rc = LDAP_AUTH_UNKNOWN;
 296                         break;
 297                 case SASL_NOAUTHZ:
 298                         rc = LDAP_PARAM_ERROR;
 299                         break;
 300                 case SASL_FAIL:
 301                         rc = LDAP_LOCAL_ERROR;
 302                         break;
 303                 case SASL_TOOWEAK:
 304                 case SASL_ENCRYPT:
 305                         rc = LDAP_AUTH_UNKNOWN;
 306                         break;
 307                 default:
 308                         rc = LDAP_LOCAL_ERROR;
 309                         break;
 310         }
 311
 312         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 313         return rc;
 314 }
 315
 316 int
 317 ldap_int_sasl_open(
 318         LDAP *ld,
 319         LDAPConn *lc,
 320         const char * host )
 321 {
 322         int rc;
 323         sasl_conn_t *ctx;
 324
 325         assert( lc->lconn_sasl_authctx == NULL );
 326
 327         if ( host == NULL ) {
 328                 ld->ld_errno = LDAP_LOCAL_ERROR;
 329                 return ld->ld_errno;
 330         }
 331
 332         if ( ldap_int_sasl_init() ) {
 333                 ld->ld_errno = LDAP_LOCAL_ERROR;
 334                 return ld->ld_errno;
 335         }
 336
 337 #if SASL_VERSION_MAJOR >= 2
 338         rc = sasl_client_new( "ldap", host, NULL, NULL,
 339                 client_callbacks, 0, &ctx );
 340 #else
 341         rc = sasl_client_new( "ldap", host, client_callbacks,
 342                 SASL_SECURITY_LAYER, &ctx );
 343 #endif
 344
 345         if ( rc != SASL_OK ) {
 346                 ld->ld_errno = sasl_err2ldap( rc );
 347                 return ld->ld_errno;
 348         }
 349
 350         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 351                 host, 0, 0 );
 352
 353         lc->lconn_sasl_authctx = ctx;
 354
 355         return LDAP_SUCCESS;
 356 }
 357
 358 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 359 {
 360         sasl_conn_t *ctx = lc->lconn_sasl_authctx;
 361
 362         if( ctx != NULL ) {
 363                 sasl_dispose( &ctx );
 364                 if ( lc->lconn_sasl_sockctx &&
 365                         lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
 366                         ctx = lc->lconn_sasl_sockctx;
 367                         sasl_dispose( &ctx );
 368                 }
 369                 lc->lconn_sasl_sockctx = NULL;
 370                 lc->lconn_sasl_authctx = NULL;
 371         }
 372         if( lc->lconn_sasl_cbind ) {
 373                 ldap_memfree( lc->lconn_sasl_cbind );
 374                 lc->lconn_sasl_cbind = 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 #ifdef SASL_CHANNEL_BINDING     /* 2.1.25+ */
 490                         {
 491                                 char cbinding[64];
 492                                 struct berval cbv = { sizeof(cbinding), cbinding };
 493                                 if ( ldap_pvt_tls_get_unique( ssl, &cbv, 0 )) {
 494                                         sasl_channel_binding_t *cb = ldap_memalloc( sizeof(*cb) +
 495                                                 cbv.bv_len);
 496                                         void *cb_data; /* used since cb->data is const* */
 497                                         cb->name = "ldap";
 498                                         cb->critical = 0;
 499                                         cb->len = cbv.bv_len;
 500                                         cb->data = cb_data = cb+1;
 501                                         memcpy( cb_data, cbv.bv_val, cbv.bv_len );
 502                                         sasl_setprop( ld->ld_defconn->lconn_sasl_authctx,
 503                                                 SASL_CHANNEL_BINDING, cb );
 504                                         ld->ld_defconn->lconn_sasl_cbind = cb;
 505                                 }
 506                         }
 507 #endif
 508                 }
 509 #endif
 510
 511 #if !defined(_WIN32)
 512                 /* Check for local */
 513                 if ( ldap_pvt_url_scheme2proto(
 514                         ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 515                 {
 516                         char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 517                                 "cn=peercred,cn=external,cn=auth")];
 518                         sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 519                                 "cn=peercred,cn=external,cn=auth",
 520                                 getegid(), geteuid() );
 521                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 522                                 LDAP_PVT_SASL_LOCAL_SSF );
 523                 }
 524 #endif
 525
 526                 /* (re)set security properties */
 527                 sasl_setprop( ctx, SASL_SEC_PROPS,
 528                         &ld->ld_options.ldo_sasl_secprops );
 529
 530                 mech = NULL;
 531
 532                 do {
 533                         saslrc = sasl_client_start( ctx,
 534                                 mechs,
 535 #if SASL_VERSION_MAJOR < 2
 536                                 NULL,
 537 #endif
 538                                 &prompts,
 539                                 (SASL_CONST char **)&ccred.bv_val,
 540                                 &credlen,
 541                                 &mech );
 542
 543                         if( pmech == NULL && mech != NULL ) {
 544                                 pmech = mech;
 545                                 *rmech = mech;
 546
 547                                 if( flags != LDAP_SASL_QUIET ) {
 548                                         fprintf(stderr,
 549                                                 "SASL/%s authentication started\n",
 550                                                 pmech );
 551                                 }
 552                         }
 553
 554                         if( saslrc == SASL_INTERACT ) {
 555                                 int res;
 556                                 if( !interact ) break;
 557                                 res = (interact)( ld, flags, defaults, prompts );
 558
 559                                 if( res != LDAP_SUCCESS ) break;
 560                         }
 561                 } while ( saslrc == SASL_INTERACT );
 562                 rc = LDAP_SASL_BIND_IN_PROGRESS;
 563
 564         } else {
 565                 /* continuing an in-progress Bind */
 566                 struct berval *scred = NULL;
 567
 568                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 569
 570                 rc = ldap_parse_sasl_bind_result( ld, result, &scred, 0 );
 571                 if ( rc != LDAP_SUCCESS ) {
 572                         if ( scred )
 573                                 ber_bvfree( scred );
 574                         goto done;
 575                 }
 576
 577                 rc = ldap_result2error( ld, result, 0 );
 578                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 579                         if( scred ) {
 580                                 /* and server provided us with data? */
 581                                 Debug( LDAP_DEBUG_TRACE,
 582                                         "ldap_int_sasl_bind: rc=%d len=%ld\n",
 583                                         rc, scred ? (long) scred->bv_len : -1L, 0 );
 584                                 ber_bvfree( scred );
 585                                 scred = NULL;
 586                         }
 587                         goto done;
 588                 }
 589
 590                 mech = *rmech;
 591                 if ( rc == LDAP_SUCCESS && mech == NULL ) {
 592                         if ( scred )
 593                                 ber_bvfree( scred );
 594                         goto success;
 595                 }
 596
 597                 do {
 598                         if( ! scred ) {
 599                                 /* no data! */
 600                                 Debug( LDAP_DEBUG_TRACE,
 601                                         "ldap_int_sasl_bind: no data in step!\n",
 602                                         0, 0, 0 );
 603                         }
 604
 605                         saslrc = sasl_client_step( ctx,
 606                                 (scred == NULL) ? NULL : scred->bv_val,
 607                                 (scred == NULL) ? 0 : scred->bv_len,
 608                                 &prompts,
 609                                 (SASL_CONST char **)&ccred.bv_val,
 610                                 &credlen );
 611
 612                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 613                                 saslrc, 0, 0 );
 614
 615                         if( saslrc == SASL_INTERACT ) {
 616                                 int res;
 617                                 if( !interact ) break;
 618                                 res = (interact)( ld, flags, defaults, prompts );
 619                                 if( res != LDAP_SUCCESS ) break;
 620                         }
 621                 } while ( saslrc == SASL_INTERACT );
 622
 623                 ber_bvfree( scred );
 624         }
 625
 626         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 627                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 628 #if SASL_VERSION_MAJOR >= 2
 629                 if ( ld->ld_error ) {
 630                         LDAP_FREE( ld->ld_error );
 631                 }
 632                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 633 #endif
 634                 goto done;
 635         }
 636
 637         if ( saslrc == SASL_OK )
 638                 *rmech = NULL;
 639
 640         ccred.bv_len = credlen;
 641
 642         if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
 643                 rc = ldap_sasl_bind( ld, dn, mech, &ccred, sctrls, cctrls, msgid );
 644
 645                 if ( ccred.bv_val != NULL ) {
 646 #if SASL_VERSION_MAJOR < 2
 647                         LDAP_FREE( ccred.bv_val );
 648 #endif
 649                         ccred.bv_val = NULL;
 650                 }
 651                 if ( rc == LDAP_SUCCESS )
 652                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 653                 goto done;
 654         }
 655
 656 success:
 657         /* Conversation was completed successfully by now */
 658         if( flags != LDAP_SASL_QUIET ) {
 659                 char *data;
 660                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 661                         (SASL_CONST void **)(char *) &data );
 662                 if( saslrc == SASL_OK && data && *data ) {
 663                         fprintf( stderr, "SASL username: %s\n", data );
 664                 }
 665
 666 #if SASL_VERSION_MAJOR < 2
 667                 saslrc = sasl_getprop( ctx, SASL_REALM,
 668                         (SASL_CONST void **) &data );
 669                 if( saslrc == SASL_OK && data && *data ) {
 670                         fprintf( stderr, "SASL realm: %s\n", data );
 671                 }
 672 #endif
 673         }
 674
 675         ssf = NULL;
 676         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 677         if( saslrc == SASL_OK ) {
 678                 if( flags != LDAP_SASL_QUIET ) {
 679                         fprintf( stderr, "SASL SSF: %lu\n",
 680                                 (unsigned long) *ssf );
 681                 }
 682
 683                 if( ssf && *ssf ) {
 684                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 685                                 sasl_conn_t     *oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 686                                 sasl_dispose( &oldctx );
 687                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 688                         }
 689                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 690                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 691
 692                         if( flags != LDAP_SASL_QUIET ) {
 693                                 fprintf( stderr, "SASL data security layer installed.\n" );
 694                         }
 695                 }
 696         }
 697         ld->ld_defconn->lconn_sasl_authctx = ctx;
 698
 699 done:
 700         return rc;
 701 }
 702
 703 int
 704 ldap_int_sasl_external(
 705         LDAP *ld,
 706         LDAPConn *conn,
 707         const char * authid,
 708         ber_len_t ssf )
 709 {
 710         int sc;
 711         sasl_conn_t *ctx;
 712 #if SASL_VERSION_MAJOR < 2
 713         sasl_external_properties_t extprops;
 714 #else
 715         sasl_ssf_t sasl_ssf = ssf;
 716 #endif
 717
 718         ctx = conn->lconn_sasl_authctx;
 719
 720         if ( ctx == NULL ) {
 721                 return LDAP_LOCAL_ERROR;
 722         }
 723
 724 #if SASL_VERSION_MAJOR >= 2
 725         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 726         if ( sc == SASL_OK )
 727                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 728 #else
 729         memset( &extprops, '\0', sizeof(extprops) );
 730         extprops.ssf = ssf;
 731         extprops.auth_id = (char *) authid;
 732
 733         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 734                 (void *) &extprops );
 735 #endif
 736
 737         if ( sc != SASL_OK ) {
 738                 return LDAP_LOCAL_ERROR;
 739         }
 740
 741         return LDAP_SUCCESS;
 742 }
 743
 744
 745 #define GOT_MINSSF      1
 746 #define GOT_MAXSSF      2
 747 #define GOT_MAXBUF      4
 748
 749 static struct {
 750         struct berval key;
 751         int sflag;
 752         int ival;
 753         int idef;
 754 } sprops[] = {
 755         { BER_BVC("none"), 0, 0, 0 },
 756         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 757         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 758         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 759         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 760         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 761         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 762         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 763         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 764         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 765         { BER_BVNULL, 0, 0, 0 }
 766 };
 767
 768 void ldap_pvt_sasl_secprops_unparse(
 769         sasl_security_properties_t *secprops,
 770         struct berval *out )
 771 {
 772         int i, l = 0;
 773         int comma;
 774         char *ptr;
 775
 776         if ( secprops == NULL || out == NULL ) {
 777                 return;
 778         }
 779
 780         comma = 0;
 781         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 782                 if ( sprops[i].ival ) {
 783                         int v = 0;
 784
 785                         switch( sprops[i].ival ) {
 786                         case GOT_MINSSF: v = secprops->min_ssf; break;
 787                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 788                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 789                         }
 790                         /* It is the default, ignore it */
 791                         if ( v == sprops[i].idef ) continue;
 792
 793                         l += sprops[i].key.bv_len + 24;
 794                 } else if ( sprops[i].sflag ) {
 795                         if ( sprops[i].sflag & secprops->security_flags ) {
 796                                 l += sprops[i].key.bv_len;
 797                         }
 798                 } else if ( secprops->security_flags == 0 ) {
 799                         l += sprops[i].key.bv_len;
 800                 }
 801                 if ( comma ) l++;
 802                 comma = 1;
 803         }
 804         l++;
 805
 806         out->bv_val = LDAP_MALLOC( l );
 807         if ( out->bv_val == NULL ) {
 808                 out->bv_len = 0;
 809                 return;
 810         }
 811
 812         ptr = out->bv_val;
 813         comma = 0;
 814         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 815                 if ( sprops[i].ival ) {
 816                         int v = 0;
 817
 818                         switch( sprops[i].ival ) {
 819                         case GOT_MINSSF: v = secprops->min_ssf; break;
 820                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 821                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 822                         }
 823                         /* It is the default, ignore it */
 824                         if ( v == sprops[i].idef ) continue;
 825
 826                         if ( comma ) *ptr++ = ',';
 827                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 828                         comma = 1;
 829                 } else if ( sprops[i].sflag ) {
 830                         if ( sprops[i].sflag & secprops->security_flags ) {
 831                                 if ( comma ) *ptr++ = ',';
 832                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 833                                 comma = 1;
 834                         }
 835                 } else if ( secprops->security_flags == 0 ) {
 836                         if ( comma ) *ptr++ = ',';
 837                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 838                         comma = 1;
 839                 }
 840         }
 841         out->bv_len = ptr - out->bv_val;
 842 }
 843
 844 int ldap_pvt_sasl_secprops(
 845         const char *in,
 846         sasl_security_properties_t *secprops )
 847 {
 848         unsigned i, j, l;
 849         char **props;
 850         unsigned sflags = 0;
 851         int got_sflags = 0;
 852         sasl_ssf_t max_ssf = 0;
 853         int got_max_ssf = 0;
 854         sasl_ssf_t min_ssf = 0;
 855         int got_min_ssf = 0;
 856         unsigned maxbufsize = 0;
 857         int got_maxbufsize = 0;
 858
 859         if( secprops == NULL ) {
 860                 return LDAP_PARAM_ERROR;
 861         }
 862         props = ldap_str2charray( in, "," );
 863         if( props == NULL ) {
 864                 return LDAP_PARAM_ERROR;
 865         }
 866
 867         for( i=0; props[i]; i++ ) {
 868                 l = strlen( props[i] );
 869                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 870                         if ( l < sprops[j].key.bv_len ) continue;
 871                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 872                                 sprops[j].key.bv_len )) continue;
 873                         if ( sprops[j].ival ) {
 874                                 unsigned v;
 875                                 char *next = NULL;
 876                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 877                                         continue;
 878                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 879                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 880                                 switch( sprops[j].ival ) {
 881                                 case GOT_MINSSF:
 882                                         min_ssf = v; got_min_ssf++; break;
 883                                 case GOT_MAXSSF:
 884                                         max_ssf = v; got_max_ssf++; break;
 885                                 case GOT_MAXBUF:
 886                                         maxbufsize = v; got_maxbufsize++; break;
 887                                 }
 888                         } else {
 889                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 890                                 if ( sprops[j].sflag )
 891                                         sflags |= sprops[j].sflag;
 892                                 else
 893                                         sflags = 0;
 894                                 got_sflags++;
 895                         }
 896                         break;
 897                 }
 898                 if ( BER_BVISNULL( &sprops[j].key )) {
 899                         ldap_charray_free( props );
 900                         return LDAP_NOT_SUPPORTED;
 901                 }
 902         }
 903
 904         if(got_sflags) {
 905                 secprops->security_flags = sflags;
 906         }
 907         if(got_min_ssf) {
 908                 secprops->min_ssf = min_ssf;
 909         }
 910         if(got_max_ssf) {
 911                 secprops->max_ssf = max_ssf;
 912         }
 913         if(got_maxbufsize) {
 914                 secprops->maxbufsize = maxbufsize;
 915         }
 916
 917         ldap_charray_free( props );
 918         return LDAP_SUCCESS;
 919 }
 920
 921 int
 922 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 923 {
 924         int rc;
 925
 926         switch( option ) {
 927         case LDAP_OPT_X_SASL_SECPROPS:
 928                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 929                 if( rc == LDAP_SUCCESS ) return 0;
 930         }
 931
 932         return -1;
 933 }
 934
 935 int
 936 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 937 {
 938         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 939                 if ( ldap_int_sasl_init() )
 940                         return -1;
 941                 *(char ***)arg = (char **)sasl_global_listmech();
 942                 return 0;
 943         }
 944
 945         if ( ld == NULL )
 946                 return -1;
 947
 948         switch ( option ) {
 949                 case LDAP_OPT_X_SASL_MECH: {
 950                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 951                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 952                 } break;
 953                 case LDAP_OPT_X_SASL_REALM: {
 954                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 955                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 956                 } break;
 957                 case LDAP_OPT_X_SASL_AUTHCID: {
 958                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 959                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 960                 } break;
 961                 case LDAP_OPT_X_SASL_AUTHZID: {
 962                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 963                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 964                 } break;
 965
 966                 case LDAP_OPT_X_SASL_SSF: {
 967                         int sc;
 968                         sasl_ssf_t      *ssf;
 969                         sasl_conn_t *ctx;
 970
 971                         if( ld->ld_defconn == NULL ) {
 972                                 return -1;
 973                         }
 974
 975                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 976
 977                         if ( ctx == NULL ) {
 978                                 return -1;
 979                         }
 980
 981                         sc = sasl_getprop( ctx, SASL_SSF,
 982                                 (SASL_CONST void **)(char *) &ssf );
 983
 984                         if ( sc != SASL_OK ) {
 985                                 return -1;
 986                         }
 987
 988                         *(ber_len_t *)arg = *ssf;
 989                 } break;
 990
 991                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 992                         /* this option is write only */
 993                         return -1;
 994
 995                 case LDAP_OPT_X_SASL_SSF_MIN:
 996                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 997                         break;
 998                 case LDAP_OPT_X_SASL_SSF_MAX:
 999                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
1000                         break;
1001                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1002                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1003                         break;
1004                 case LDAP_OPT_X_SASL_NOCANON:
1005                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1006                         break;
1007
1008                 case LDAP_OPT_X_SASL_USERNAME: {
1009                         int sc;
1010                         char *username;
1011                         sasl_conn_t *ctx;
1012
1013                         if( ld->ld_defconn == NULL ) {
1014                                 return -1;
1015                         }
1016
1017                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1018
1019                         if ( ctx == NULL ) {
1020                                 return -1;
1021                         }
1022
1023                         sc = sasl_getprop( ctx, SASL_USERNAME,
1024                                 (SASL_CONST void **)(char **) &username );
1025
1026                         if ( sc != SASL_OK ) {
1027                                 return -1;
1028                         }
1029
1030                         *(char **)arg = username ? LDAP_STRDUP( username ) : NULL;
1031                 } break;
1032
1033                 case LDAP_OPT_X_SASL_SECPROPS:
1034                         /* this option is write only */
1035                         return -1;
1036
1037 #ifdef SASL_GSS_CREDS
1038                 case LDAP_OPT_X_SASL_GSS_CREDS: {
1039                         sasl_conn_t *ctx;
1040                         int sc;
1041
1042                         if ( ld->ld_defconn == NULL )
1043                                 return -1;
1044
1045                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1046                         if ( ctx == NULL )
1047                                 return -1;
1048
1049                         sc = sasl_getprop( ctx, SASL_GSS_CREDS, arg );
1050                         if ( sc != SASL_OK )
1051                                 return -1;
1052                         }
1053                         break;
1054 #endif
1055
1056                 default:
1057                         return -1;
1058         }
1059         return 0;
1060 }
1061
1062 int
1063 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1064 {
1065         if ( ld == NULL )
1066                 return -1;
1067
1068         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1069                 return -1;
1070
1071         switch ( option ) {
1072         case LDAP_OPT_X_SASL_SSF:
1073         case LDAP_OPT_X_SASL_USERNAME:
1074                 /* This option is read-only */
1075                 return -1;
1076
1077         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1078                 int sc;
1079 #if SASL_VERSION_MAJOR < 2
1080                 sasl_external_properties_t extprops;
1081 #else
1082                 sasl_ssf_t sasl_ssf;
1083 #endif
1084                 sasl_conn_t *ctx;
1085
1086                 if( ld->ld_defconn == NULL ) {
1087                         return -1;
1088                 }
1089
1090                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1091
1092                 if ( ctx == NULL ) {
1093                         return -1;
1094                 }
1095
1096 #if SASL_VERSION_MAJOR >= 2
1097                 sasl_ssf = * (ber_len_t *)arg;
1098                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1099 #else
1100                 memset(&extprops, 0L, sizeof(extprops));
1101
1102                 extprops.ssf = * (ber_len_t *) arg;
1103
1104                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1105                         (void *) &extprops );
1106 #endif
1107
1108                 if ( sc != SASL_OK ) {
1109                         return -1;
1110                 }
1111                 } break;
1112
1113         case LDAP_OPT_X_SASL_SSF_MIN:
1114                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1115                 break;
1116         case LDAP_OPT_X_SASL_SSF_MAX:
1117                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1118                 break;
1119         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1120                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1121                 break;
1122         case LDAP_OPT_X_SASL_NOCANON:
1123                 if ( arg == LDAP_OPT_OFF ) {
1124                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1125                 } else {
1126                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1127                 }
1128                 break;
1129
1130         case LDAP_OPT_X_SASL_SECPROPS: {
1131                 int sc;
1132                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1133                         &ld->ld_options.ldo_sasl_secprops );
1134
1135                 return sc == LDAP_SUCCESS ? 0 : -1;
1136                 }
1137
1138 #ifdef SASL_GSS_CREDS
1139         case LDAP_OPT_X_SASL_GSS_CREDS: {
1140                 sasl_conn_t *ctx;
1141                 int sc;
1142
1143                 if ( ld->ld_defconn == NULL )
1144                         return -1;
1145
1146                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1147                 if ( ctx == NULL )
1148                         return -1;
1149
1150                 sc = sasl_setprop( ctx, SASL_GSS_CREDS, arg );
1151                 if ( sc != SASL_OK )
1152                         return -1;
1153                 }
1154                 break;
1155 #endif
1156
1157         default:
1158                 return -1;
1159         }
1160         return 0;
1161 }
1162
1163 #ifdef LDAP_R_COMPILE
1164 #define LDAP_DEBUG_R_SASL
1165 void *ldap_pvt_sasl_mutex_new(void)
1166 {
1167         ldap_pvt_thread_mutex_t *mutex;
1168
1169         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1170                 sizeof(ldap_pvt_thread_mutex_t) );
1171
1172         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1173                 return mutex;
1174         }
1175         LDAP_FREE( mutex );
1176 #ifndef LDAP_DEBUG_R_SASL
1177         assert( 0 );
1178 #endif /* !LDAP_DEBUG_R_SASL */
1179         return NULL;
1180 }
1181
1182 int ldap_pvt_sasl_mutex_lock(void *mutex)
1183 {
1184 #ifdef LDAP_DEBUG_R_SASL
1185         if ( mutex == NULL ) {
1186                 return SASL_OK;
1187         }
1188 #else /* !LDAP_DEBUG_R_SASL */
1189         assert( mutex != NULL );
1190 #endif /* !LDAP_DEBUG_R_SASL */
1191         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1192                 ? SASL_FAIL : SASL_OK;
1193 }
1194
1195 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1196 {
1197 #ifdef LDAP_DEBUG_R_SASL
1198         if ( mutex == NULL ) {
1199                 return SASL_OK;
1200         }
1201 #else /* !LDAP_DEBUG_R_SASL */
1202         assert( mutex != NULL );
1203 #endif /* !LDAP_DEBUG_R_SASL */
1204         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1205                 ? SASL_FAIL : SASL_OK;
1206 }
1207
1208 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1209 {
1210 #ifdef LDAP_DEBUG_R_SASL
1211         if ( mutex == NULL ) {
1212                 return;
1213         }
1214 #else /* !LDAP_DEBUG_R_SASL */
1215         assert( mutex != NULL );
1216 #endif /* !LDAP_DEBUG_R_SASL */
1217         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1218         LDAP_FREE( mutex );
1219 }
1220 #endif
1221
1222 #else
1223 int ldap_int_sasl_init( void )
1224 { return LDAP_SUCCESS; }
1225
1226 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1227 { return LDAP_SUCCESS; }
1228
1229 int
1230 ldap_int_sasl_bind(
1231         LDAP                    *ld,
1232         const char              *dn,
1233         const char              *mechs,
1234         LDAPControl             **sctrls,
1235         LDAPControl             **cctrls,
1236         unsigned                flags,
1237         LDAP_SASL_INTERACT_PROC *interact,
1238         void                    *defaults,
1239         LDAPMessage             *result,
1240         const char              **rmech,
1241         int                             *msgid )
1242 { return LDAP_NOT_SUPPORTED; }
1243
1244 int
1245 ldap_int_sasl_external(
1246         LDAP *ld,
1247         LDAPConn *conn,
1248         const char * authid,
1249         ber_len_t ssf )
1250 { return LDAP_SUCCESS; }
1251
1252 #endif /* HAVE_CYRUS_SASL */