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 1998-2014 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                                         cb->name = "ldap";
 497                                         cb->critical = 0;
 498                                         cb->data = (char *)(cb+1);
 499                                         cb->len = cbv.bv_len;
 500                                         memcpy( cb->data, cbv.bv_val, cbv.bv_len );
 501                                         sasl_setprop( ld->ld_defconn->lconn_sasl_authctx,
 502                                                 SASL_CHANNEL_BINDING, cb );
 503                                         ld->ld_defconn->lconn_sasl_cbind = cb;
 504                                 }
 505                         }
 506 #endif
 507                 }
 508 #endif
 509
 510 #if !defined(_WIN32)
 511                 /* Check for local */
 512                 if ( ldap_pvt_url_scheme2proto(
 513                         ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 514                 {
 515                         char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 516                                 "cn=peercred,cn=external,cn=auth")];
 517                         sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 518                                 "cn=peercred,cn=external,cn=auth",
 519                                 getegid(), geteuid() );
 520                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 521                                 LDAP_PVT_SASL_LOCAL_SSF );
 522                 }
 523 #endif
 524
 525                 /* (re)set security properties */
 526                 sasl_setprop( ctx, SASL_SEC_PROPS,
 527                         &ld->ld_options.ldo_sasl_secprops );
 528
 529                 mech = NULL;
 530
 531                 do {
 532                         saslrc = sasl_client_start( ctx,
 533                                 mechs,
 534 #if SASL_VERSION_MAJOR < 2
 535                                 NULL,
 536 #endif
 537                                 &prompts,
 538                                 (SASL_CONST char **)&ccred.bv_val,
 539                                 &credlen,
 540                                 &mech );
 541
 542                         if( pmech == NULL && mech != NULL ) {
 543                                 pmech = mech;
 544                                 *rmech = mech;
 545
 546                                 if( flags != LDAP_SASL_QUIET ) {
 547                                         fprintf(stderr,
 548                                                 "SASL/%s authentication started\n",
 549                                                 pmech );
 550                                 }
 551                         }
 552
 553                         if( saslrc == SASL_INTERACT ) {
 554                                 int res;
 555                                 if( !interact ) break;
 556                                 res = (interact)( ld, flags, defaults, prompts );
 557
 558                                 if( res != LDAP_SUCCESS ) break;
 559                         }
 560                 } while ( saslrc == SASL_INTERACT );
 561                 rc = LDAP_SASL_BIND_IN_PROGRESS;
 562
 563         } else {
 564                 /* continuing an in-progress Bind */
 565                 struct berval *scred = NULL;
 566
 567                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 568
 569                 rc = ldap_parse_sasl_bind_result( ld, result, &scred, 0 );
 570                 if ( rc != LDAP_SUCCESS ) {
 571                         if ( scred )
 572                                 ber_bvfree( scred );
 573                         goto done;
 574                 }
 575
 576                 rc = ldap_result2error( ld, result, 0 );
 577                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 578                         if( scred ) {
 579                                 /* and server provided us with data? */
 580                                 Debug( LDAP_DEBUG_TRACE,
 581                                         "ldap_int_sasl_bind: rc=%d len=%ld\n",
 582                                         rc, scred ? (long) scred->bv_len : -1L, 0 );
 583                                 ber_bvfree( scred );
 584                                 scred = NULL;
 585                         }
 586                         goto done;
 587                 }
 588
 589                 mech = *rmech;
 590                 if ( rc == LDAP_SUCCESS && mech == NULL ) {
 591                         if ( scred )
 592                                 ber_bvfree( scred );
 593                         goto success;
 594                 }
 595
 596                 do {
 597                         if( ! scred ) {
 598                                 /* no data! */
 599                                 Debug( LDAP_DEBUG_TRACE,
 600                                         "ldap_int_sasl_bind: no data in step!\n",
 601                                         0, 0, 0 );
 602                         }
 603
 604                         saslrc = sasl_client_step( ctx,
 605                                 (scred == NULL) ? NULL : scred->bv_val,
 606                                 (scred == NULL) ? 0 : scred->bv_len,
 607                                 &prompts,
 608                                 (SASL_CONST char **)&ccred.bv_val,
 609                                 &credlen );
 610
 611                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 612                                 saslrc, 0, 0 );
 613
 614                         if( saslrc == SASL_INTERACT ) {
 615                                 int res;
 616                                 if( !interact ) break;
 617                                 res = (interact)( ld, flags, defaults, prompts );
 618                                 if( res != LDAP_SUCCESS ) break;
 619                         }
 620                 } while ( saslrc == SASL_INTERACT );
 621
 622                 ber_bvfree( scred );
 623         }
 624
 625         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 626                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 627 #if SASL_VERSION_MAJOR >= 2
 628                 if ( ld->ld_error ) {
 629                         LDAP_FREE( ld->ld_error );
 630                 }
 631                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 632 #endif
 633                 goto done;
 634         }
 635
 636         if ( saslrc == SASL_OK )
 637                 *rmech = NULL;
 638
 639         ccred.bv_len = credlen;
 640
 641         if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
 642                 rc = ldap_sasl_bind( ld, dn, mech, &ccred, sctrls, cctrls, msgid );
 643
 644                 if ( ccred.bv_val != NULL ) {
 645 #if SASL_VERSION_MAJOR < 2
 646                         LDAP_FREE( ccred.bv_val );
 647 #endif
 648                         ccred.bv_val = NULL;
 649                 }
 650                 if ( rc == LDAP_SUCCESS )
 651                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 652                 goto done;
 653         }
 654
 655 success:
 656         /* Conversation was completed successfully by now */
 657         if( flags != LDAP_SASL_QUIET ) {
 658                 char *data;
 659                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 660                         (SASL_CONST void **)(char *) &data );
 661                 if( saslrc == SASL_OK && data && *data ) {
 662                         fprintf( stderr, "SASL username: %s\n", data );
 663                 }
 664
 665 #if SASL_VERSION_MAJOR < 2
 666                 saslrc = sasl_getprop( ctx, SASL_REALM,
 667                         (SASL_CONST void **) &data );
 668                 if( saslrc == SASL_OK && data && *data ) {
 669                         fprintf( stderr, "SASL realm: %s\n", data );
 670                 }
 671 #endif
 672         }
 673
 674         ssf = NULL;
 675         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 676         if( saslrc == SASL_OK ) {
 677                 if( flags != LDAP_SASL_QUIET ) {
 678                         fprintf( stderr, "SASL SSF: %lu\n",
 679                                 (unsigned long) *ssf );
 680                 }
 681
 682                 if( ssf && *ssf ) {
 683                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 684                                 sasl_conn_t     *oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 685                                 sasl_dispose( &oldctx );
 686                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 687                         }
 688                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 689                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 690
 691                         if( flags != LDAP_SASL_QUIET ) {
 692                                 fprintf( stderr, "SASL data security layer installed.\n" );
 693                         }
 694                 }
 695         }
 696         ld->ld_defconn->lconn_sasl_authctx = ctx;
 697
 698 done:
 699         return rc;
 700 }
 701
 702 int
 703 ldap_int_sasl_external(
 704         LDAP *ld,
 705         LDAPConn *conn,
 706         const char * authid,
 707         ber_len_t ssf )
 708 {
 709         int sc;
 710         sasl_conn_t *ctx;
 711 #if SASL_VERSION_MAJOR < 2
 712         sasl_external_properties_t extprops;
 713 #else
 714         sasl_ssf_t sasl_ssf = ssf;
 715 #endif
 716
 717         ctx = conn->lconn_sasl_authctx;
 718
 719         if ( ctx == NULL ) {
 720                 return LDAP_LOCAL_ERROR;
 721         }
 722
 723 #if SASL_VERSION_MAJOR >= 2
 724         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 725         if ( sc == SASL_OK )
 726                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 727 #else
 728         memset( &extprops, '\0', sizeof(extprops) );
 729         extprops.ssf = ssf;
 730         extprops.auth_id = (char *) authid;
 731
 732         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 733                 (void *) &extprops );
 734 #endif
 735
 736         if ( sc != SASL_OK ) {
 737                 return LDAP_LOCAL_ERROR;
 738         }
 739
 740         return LDAP_SUCCESS;
 741 }
 742
 743
 744 #define GOT_MINSSF      1
 745 #define GOT_MAXSSF      2
 746 #define GOT_MAXBUF      4
 747
 748 static struct {
 749         struct berval key;
 750         int sflag;
 751         int ival;
 752         int idef;
 753 } sprops[] = {
 754         { BER_BVC("none"), 0, 0, 0 },
 755         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 756         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 757         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 758         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 759         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 760         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 761         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 762         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 763         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 764         { BER_BVNULL, 0, 0, 0 }
 765 };
 766
 767 void ldap_pvt_sasl_secprops_unparse(
 768         sasl_security_properties_t *secprops,
 769         struct berval *out )
 770 {
 771         int i, l = 0;
 772         int comma;
 773         char *ptr;
 774
 775         if ( secprops == NULL || out == NULL ) {
 776                 return;
 777         }
 778
 779         comma = 0;
 780         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 781                 if ( sprops[i].ival ) {
 782                         int v = 0;
 783
 784                         switch( sprops[i].ival ) {
 785                         case GOT_MINSSF: v = secprops->min_ssf; break;
 786                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 787                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 788                         }
 789                         /* It is the default, ignore it */
 790                         if ( v == sprops[i].idef ) continue;
 791
 792                         l += sprops[i].key.bv_len + 24;
 793                 } else if ( sprops[i].sflag ) {
 794                         if ( sprops[i].sflag & secprops->security_flags ) {
 795                                 l += sprops[i].key.bv_len;
 796                         }
 797                 } else if ( secprops->security_flags == 0 ) {
 798                         l += sprops[i].key.bv_len;
 799                 }
 800                 if ( comma ) l++;
 801                 comma = 1;
 802         }
 803         l++;
 804
 805         out->bv_val = LDAP_MALLOC( l );
 806         if ( out->bv_val == NULL ) {
 807                 out->bv_len = 0;
 808                 return;
 809         }
 810
 811         ptr = out->bv_val;
 812         comma = 0;
 813         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 814                 if ( sprops[i].ival ) {
 815                         int v = 0;
 816
 817                         switch( sprops[i].ival ) {
 818                         case GOT_MINSSF: v = secprops->min_ssf; break;
 819                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 820                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 821                         }
 822                         /* It is the default, ignore it */
 823                         if ( v == sprops[i].idef ) continue;
 824
 825                         if ( comma ) *ptr++ = ',';
 826                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 827                         comma = 1;
 828                 } else if ( sprops[i].sflag ) {
 829                         if ( sprops[i].sflag & secprops->security_flags ) {
 830                                 if ( comma ) *ptr++ = ',';
 831                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 832                                 comma = 1;
 833                         }
 834                 } else if ( secprops->security_flags == 0 ) {
 835                         if ( comma ) *ptr++ = ',';
 836                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 837                         comma = 1;
 838                 }
 839         }
 840         out->bv_len = ptr - out->bv_val;
 841 }
 842
 843 int ldap_pvt_sasl_secprops(
 844         const char *in,
 845         sasl_security_properties_t *secprops )
 846 {
 847         unsigned i, j, l;
 848         char **props;
 849         unsigned sflags = 0;
 850         int got_sflags = 0;
 851         sasl_ssf_t max_ssf = 0;
 852         int got_max_ssf = 0;
 853         sasl_ssf_t min_ssf = 0;
 854         int got_min_ssf = 0;
 855         unsigned maxbufsize = 0;
 856         int got_maxbufsize = 0;
 857
 858         if( secprops == NULL ) {
 859                 return LDAP_PARAM_ERROR;
 860         }
 861         props = ldap_str2charray( in, "," );
 862         if( props == NULL ) {
 863                 return LDAP_PARAM_ERROR;
 864         }
 865
 866         for( i=0; props[i]; i++ ) {
 867                 l = strlen( props[i] );
 868                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 869                         if ( l < sprops[j].key.bv_len ) continue;
 870                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 871                                 sprops[j].key.bv_len )) continue;
 872                         if ( sprops[j].ival ) {
 873                                 unsigned v;
 874                                 char *next = NULL;
 875                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 876                                         continue;
 877                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 878                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 879                                 switch( sprops[j].ival ) {
 880                                 case GOT_MINSSF:
 881                                         min_ssf = v; got_min_ssf++; break;
 882                                 case GOT_MAXSSF:
 883                                         max_ssf = v; got_max_ssf++; break;
 884                                 case GOT_MAXBUF:
 885                                         maxbufsize = v; got_maxbufsize++; break;
 886                                 }
 887                         } else {
 888                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 889                                 if ( sprops[j].sflag )
 890                                         sflags |= sprops[j].sflag;
 891                                 else
 892                                         sflags = 0;
 893                                 got_sflags++;
 894                         }
 895                         break;
 896                 }
 897                 if ( BER_BVISNULL( &sprops[j].key )) {
 898                         ldap_charray_free( props );
 899                         return LDAP_NOT_SUPPORTED;
 900                 }
 901         }
 902
 903         if(got_sflags) {
 904                 secprops->security_flags = sflags;
 905         }
 906         if(got_min_ssf) {
 907                 secprops->min_ssf = min_ssf;
 908         }
 909         if(got_max_ssf) {
 910                 secprops->max_ssf = max_ssf;
 911         }
 912         if(got_maxbufsize) {
 913                 secprops->maxbufsize = maxbufsize;
 914         }
 915
 916         ldap_charray_free( props );
 917         return LDAP_SUCCESS;
 918 }
 919
 920 int
 921 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 922 {
 923         int rc;
 924
 925         switch( option ) {
 926         case LDAP_OPT_X_SASL_SECPROPS:
 927                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 928                 if( rc == LDAP_SUCCESS ) return 0;
 929         }
 930
 931         return -1;
 932 }
 933
 934 int
 935 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 936 {
 937         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 938                 if ( ldap_int_sasl_init() )
 939                         return -1;
 940                 *(char ***)arg = (char **)sasl_global_listmech();
 941                 return 0;
 942         }
 943
 944         if ( ld == NULL )
 945                 return -1;
 946
 947         switch ( option ) {
 948                 case LDAP_OPT_X_SASL_MECH: {
 949                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 950                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 951                 } break;
 952                 case LDAP_OPT_X_SASL_REALM: {
 953                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 954                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 955                 } break;
 956                 case LDAP_OPT_X_SASL_AUTHCID: {
 957                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 958                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 959                 } break;
 960                 case LDAP_OPT_X_SASL_AUTHZID: {
 961                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 962                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 963                 } break;
 964
 965                 case LDAP_OPT_X_SASL_SSF: {
 966                         int sc;
 967                         sasl_ssf_t      *ssf;
 968                         sasl_conn_t *ctx;
 969
 970                         if( ld->ld_defconn == NULL ) {
 971                                 return -1;
 972                         }
 973
 974                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 975
 976                         if ( ctx == NULL ) {
 977                                 return -1;
 978                         }
 979
 980                         sc = sasl_getprop( ctx, SASL_SSF,
 981                                 (SASL_CONST void **)(char *) &ssf );
 982
 983                         if ( sc != SASL_OK ) {
 984                                 return -1;
 985                         }
 986
 987                         *(ber_len_t *)arg = *ssf;
 988                 } break;
 989
 990                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 991                         /* this option is write only */
 992                         return -1;
 993
 994                 case LDAP_OPT_X_SASL_SSF_MIN:
 995                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 996                         break;
 997                 case LDAP_OPT_X_SASL_SSF_MAX:
 998                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 999                         break;
1000                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1001                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1002                         break;
1003                 case LDAP_OPT_X_SASL_NOCANON:
1004                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1005                         break;
1006
1007                 case LDAP_OPT_X_SASL_USERNAME: {
1008                         int sc;
1009                         char *username;
1010                         sasl_conn_t *ctx;
1011
1012                         if( ld->ld_defconn == NULL ) {
1013                                 return -1;
1014                         }
1015
1016                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1017
1018                         if ( ctx == NULL ) {
1019                                 return -1;
1020                         }
1021
1022                         sc = sasl_getprop( ctx, SASL_USERNAME,
1023                                 (SASL_CONST void **)(char **) &username );
1024
1025                         if ( sc != SASL_OK ) {
1026                                 return -1;
1027                         }
1028
1029                         *(char **)arg = username ? LDAP_STRDUP( username ) : NULL;
1030                 } break;
1031
1032                 case LDAP_OPT_X_SASL_SECPROPS:
1033                         /* this option is write only */
1034                         return -1;
1035
1036 #ifdef SASL_GSS_CREDS
1037                 case LDAP_OPT_X_SASL_GSS_CREDS: {
1038                         sasl_conn_t *ctx;
1039                         int sc;
1040
1041                         if ( ld->ld_defconn == NULL )
1042                                 return -1;
1043
1044                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1045                         if ( ctx == NULL )
1046                                 return -1;
1047
1048                         sc = sasl_getprop( ctx, SASL_GSS_CREDS, arg );
1049                         if ( sc != SASL_OK )
1050                                 return -1;
1051                         }
1052                         break;
1053 #endif
1054
1055                 default:
1056                         return -1;
1057         }
1058         return 0;
1059 }
1060
1061 int
1062 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1063 {
1064         if ( ld == NULL )
1065                 return -1;
1066
1067         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1068                 return -1;
1069
1070         switch ( option ) {
1071         case LDAP_OPT_X_SASL_SSF:
1072         case LDAP_OPT_X_SASL_USERNAME:
1073                 /* This option is read-only */
1074                 return -1;
1075
1076         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1077                 int sc;
1078 #if SASL_VERSION_MAJOR < 2
1079                 sasl_external_properties_t extprops;
1080 #else
1081                 sasl_ssf_t sasl_ssf;
1082 #endif
1083                 sasl_conn_t *ctx;
1084
1085                 if( ld->ld_defconn == NULL ) {
1086                         return -1;
1087                 }
1088
1089                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1090
1091                 if ( ctx == NULL ) {
1092                         return -1;
1093                 }
1094
1095 #if SASL_VERSION_MAJOR >= 2
1096                 sasl_ssf = * (ber_len_t *)arg;
1097                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1098 #else
1099                 memset(&extprops, 0L, sizeof(extprops));
1100
1101                 extprops.ssf = * (ber_len_t *) arg;
1102
1103                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1104                         (void *) &extprops );
1105 #endif
1106
1107                 if ( sc != SASL_OK ) {
1108                         return -1;
1109                 }
1110                 } break;
1111
1112         case LDAP_OPT_X_SASL_SSF_MIN:
1113                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1114                 break;
1115         case LDAP_OPT_X_SASL_SSF_MAX:
1116                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1117                 break;
1118         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1119                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1120                 break;
1121         case LDAP_OPT_X_SASL_NOCANON:
1122                 if ( arg == LDAP_OPT_OFF ) {
1123                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1124                 } else {
1125                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1126                 }
1127                 break;
1128
1129         case LDAP_OPT_X_SASL_SECPROPS: {
1130                 int sc;
1131                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1132                         &ld->ld_options.ldo_sasl_secprops );
1133
1134                 return sc == LDAP_SUCCESS ? 0 : -1;
1135                 }
1136
1137 #ifdef SASL_GSS_CREDS
1138         case LDAP_OPT_X_SASL_GSS_CREDS: {
1139                 sasl_conn_t *ctx;
1140                 int sc;
1141
1142                 if ( ld->ld_defconn == NULL )
1143                         return -1;
1144
1145                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1146                 if ( ctx == NULL )
1147                         return -1;
1148
1149                 sc = sasl_setprop( ctx, SASL_GSS_CREDS, arg );
1150                 if ( sc != SASL_OK )
1151                         return -1;
1152                 }
1153                 break;
1154 #endif
1155
1156         default:
1157                 return -1;
1158         }
1159         return 0;
1160 }
1161
1162 #ifdef LDAP_R_COMPILE
1163 #define LDAP_DEBUG_R_SASL
1164 void *ldap_pvt_sasl_mutex_new(void)
1165 {
1166         ldap_pvt_thread_mutex_t *mutex;
1167
1168         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1169                 sizeof(ldap_pvt_thread_mutex_t) );
1170
1171         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1172                 return mutex;
1173         }
1174 #ifndef LDAP_DEBUG_R_SASL
1175         assert( 0 );
1176 #endif /* !LDAP_DEBUG_R_SASL */
1177         return NULL;
1178 }
1179
1180 int ldap_pvt_sasl_mutex_lock(void *mutex)
1181 {
1182 #ifdef LDAP_DEBUG_R_SASL
1183         if ( mutex == NULL ) {
1184                 return SASL_OK;
1185         }
1186 #else /* !LDAP_DEBUG_R_SASL */
1187         assert( mutex != NULL );
1188 #endif /* !LDAP_DEBUG_R_SASL */
1189         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1190                 ? SASL_FAIL : SASL_OK;
1191 }
1192
1193 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1194 {
1195 #ifdef LDAP_DEBUG_R_SASL
1196         if ( mutex == NULL ) {
1197                 return SASL_OK;
1198         }
1199 #else /* !LDAP_DEBUG_R_SASL */
1200         assert( mutex != NULL );
1201 #endif /* !LDAP_DEBUG_R_SASL */
1202         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1203                 ? SASL_FAIL : SASL_OK;
1204 }
1205
1206 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1207 {
1208 #ifdef LDAP_DEBUG_R_SASL
1209         if ( mutex == NULL ) {
1210                 return;
1211         }
1212 #else /* !LDAP_DEBUG_R_SASL */
1213         assert( mutex != NULL );
1214 #endif /* !LDAP_DEBUG_R_SASL */
1215         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1216         LDAP_FREE( mutex );
1217 }
1218 #endif
1219
1220 #else
1221 int ldap_int_sasl_init( void )
1222 { return LDAP_SUCCESS; }
1223
1224 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1225 { return LDAP_SUCCESS; }
1226
1227 int
1228 ldap_int_sasl_bind(
1229         LDAP                    *ld,
1230         const char              *dn,
1231         const char              *mechs,
1232         LDAPControl             **sctrls,
1233         LDAPControl             **cctrls,
1234         unsigned                flags,
1235         LDAP_SASL_INTERACT_PROC *interact,
1236         void                    *defaults,
1237         LDAPMessage             *result,
1238         const char              **rmech,
1239         int                             *msgid )
1240 { return LDAP_NOT_SUPPORTED; }
1241
1242 int
1243 ldap_int_sasl_external(
1244         LDAP *ld,
1245         LDAPConn *conn,
1246         const char * authid,
1247         ber_len_t ssf )
1248 { return LDAP_SUCCESS; }
1249
1250 #endif /* HAVE_CYRUS_SASL */