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 1998-2013 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
 373         return LDAP_SUCCESS;
 374 }
 375
 376 int
 377 ldap_int_sasl_bind(
 378         LDAP                    *ld,
 379         const char              *dn,
 380         const char              *mechs,
 381         LDAPControl             **sctrls,
 382         LDAPControl             **cctrls,
 383         unsigned                flags,
 384         LDAP_SASL_INTERACT_PROC *interact,
 385         void                    *defaults,
 386         LDAPMessage             *result,
 387         const char              **rmech,
 388         int                             *msgid )
 389 {
 390         const char              *mech;
 391         sasl_ssf_t              *ssf;
 392         sasl_conn_t             *ctx;
 393         sasl_interact_t *prompts = NULL;
 394         struct berval   ccred = BER_BVNULL;
 395         int saslrc, rc;
 396         unsigned credlen;
 397
 398         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 399                 mechs ? mechs : "<null>", 0, 0 );
 400
 401         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 402         if (ld->ld_version < LDAP_VERSION3) {
 403                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 404                 return ld->ld_errno;
 405         }
 406
 407         /* Starting a Bind */
 408         if ( !result ) {
 409                 const char *pmech = NULL;
 410                 sasl_conn_t     *oldctx;
 411                 ber_socket_t            sd;
 412                 void    *ssl;
 413
 414                 rc = 0;
 415                 LDAP_MUTEX_LOCK( &ld->ld_conn_mutex );
 416                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 417
 418                 if ( sd == AC_SOCKET_INVALID || !ld->ld_defconn ) {
 419                         /* not connected yet */
 420
 421                         rc = ldap_open_defconn( ld );
 422
 423                         if ( rc == 0 ) {
 424                                 ber_sockbuf_ctrl( ld->ld_defconn->lconn_sb,
 425                                         LBER_SB_OPT_GET_FD, &sd );
 426
 427                                 if( sd == AC_SOCKET_INVALID ) {
 428                                         ld->ld_errno = LDAP_LOCAL_ERROR;
 429                                         rc = ld->ld_errno;
 430                                 }
 431                         }
 432                 }
 433                 if ( rc == 0 && ld->ld_defconn &&
 434                         ld->ld_defconn->lconn_status == LDAP_CONNST_CONNECTING ) {
 435                         rc = ldap_int_check_async_open( ld, sd );
 436                 }
 437                 LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
 438                 if( rc != 0 ) return ld->ld_errno;
 439
 440                 oldctx = ld->ld_defconn->lconn_sasl_authctx;
 441
 442                 /* If we already have an authentication context, clear it out */
 443                 if( oldctx ) {
 444                         if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
 445                                 sasl_dispose( &oldctx );
 446                         }
 447                         ld->ld_defconn->lconn_sasl_authctx = NULL;
 448                 }
 449
 450                 {
 451                         char *saslhost;
 452                         int nocanon = (int)LDAP_BOOL_GET( &ld->ld_options,
 453                                 LDAP_BOOL_SASL_NOCANON );
 454
 455                         /* If we don't need to canonicalize just use the host
 456                          * from the LDAP URI.
 457                          */
 458                         if ( nocanon )
 459                                 saslhost = ld->ld_defconn->lconn_server->lud_host;
 460                         else
 461                                 saslhost = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
 462                                 "localhost" );
 463                         rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
 464                         if ( !nocanon )
 465                                 LDAP_FREE( saslhost );
 466                 }
 467
 468                 if ( rc != LDAP_SUCCESS ) return rc;
 469
 470                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 471
 472 #ifdef HAVE_TLS
 473                 /* Check for TLS */
 474                 ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
 475                 if ( ssl ) {
 476                         struct berval authid = BER_BVNULL;
 477                         ber_len_t fac;
 478
 479                         fac = ldap_pvt_tls_get_strength( ssl );
 480                         /* failure is OK, we just can't use SASL EXTERNAL */
 481                         (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 482
 483                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 484                         LDAP_FREE( authid.bv_val );
 485                 }
 486 #endif
 487
 488 #if !defined(_WIN32)
 489                 /* Check for local */
 490                 if ( ldap_pvt_url_scheme2proto(
 491                         ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 492                 {
 493                         char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 494                                 "cn=peercred,cn=external,cn=auth")];
 495                         sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 496                                 "cn=peercred,cn=external,cn=auth",
 497                                 getegid(), geteuid() );
 498                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 499                                 LDAP_PVT_SASL_LOCAL_SSF );
 500                 }
 501 #endif
 502
 503                 /* (re)set security properties */
 504                 sasl_setprop( ctx, SASL_SEC_PROPS,
 505                         &ld->ld_options.ldo_sasl_secprops );
 506
 507                 mech = NULL;
 508
 509                 do {
 510                         saslrc = sasl_client_start( ctx,
 511                                 mechs,
 512 #if SASL_VERSION_MAJOR < 2
 513                                 NULL,
 514 #endif
 515                                 &prompts,
 516                                 (SASL_CONST char **)&ccred.bv_val,
 517                                 &credlen,
 518                                 &mech );
 519
 520                         if( pmech == NULL && mech != NULL ) {
 521                                 pmech = mech;
 522                                 *rmech = mech;
 523
 524                                 if( flags != LDAP_SASL_QUIET ) {
 525                                         fprintf(stderr,
 526                                                 "SASL/%s authentication started\n",
 527                                                 pmech );
 528                                 }
 529                         }
 530
 531                         if( saslrc == SASL_INTERACT ) {
 532                                 int res;
 533                                 if( !interact ) break;
 534                                 res = (interact)( ld, flags, defaults, prompts );
 535
 536                                 if( res != LDAP_SUCCESS ) break;
 537                         }
 538                 } while ( saslrc == SASL_INTERACT );
 539                 rc = LDAP_SASL_BIND_IN_PROGRESS;
 540
 541         } else {
 542                 /* continuing an in-progress Bind */
 543                 struct berval *scred = NULL;
 544
 545                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 546
 547                 rc = ldap_parse_sasl_bind_result( ld, result, &scred, 0 );
 548                 if ( rc != LDAP_SUCCESS )
 549                         goto done;
 550
 551                 rc = ldap_result2error( ld, result, 0 );
 552                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 553                         if( scred ) {
 554                                 /* and server provided us with data? */
 555                                 Debug( LDAP_DEBUG_TRACE,
 556                                         "ldap_int_sasl_bind: rc=%d len=%ld\n",
 557                                         rc, scred ? (long) scred->bv_len : -1L, 0 );
 558                                 ber_bvfree( scred );
 559                                 scred = NULL;
 560                         }
 561                         goto done;
 562                 }
 563
 564                 mech = *rmech;
 565                 if ( rc == LDAP_SUCCESS && mech == NULL )
 566                         goto success;
 567
 568                 do {
 569                         if( ! scred ) {
 570                                 /* no data! */
 571                                 Debug( LDAP_DEBUG_TRACE,
 572                                         "ldap_int_sasl_bind: no data in step!\n",
 573                                         0, 0, 0 );
 574                         }
 575
 576                         saslrc = sasl_client_step( ctx,
 577                                 (scred == NULL) ? NULL : scred->bv_val,
 578                                 (scred == NULL) ? 0 : scred->bv_len,
 579                                 &prompts,
 580                                 (SASL_CONST char **)&ccred.bv_val,
 581                                 &credlen );
 582
 583                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 584                                 saslrc, 0, 0 );
 585
 586                         if( saslrc == SASL_INTERACT ) {
 587                                 int res;
 588                                 if( !interact ) break;
 589                                 res = (interact)( ld, flags, defaults, prompts );
 590                                 if( res != LDAP_SUCCESS ) break;
 591                         }
 592                 } while ( saslrc == SASL_INTERACT );
 593
 594                 ber_bvfree( scred );
 595         }
 596
 597         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 598                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 599 #if SASL_VERSION_MAJOR >= 2
 600                 if ( ld->ld_error ) {
 601                         LDAP_FREE( ld->ld_error );
 602                 }
 603                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 604 #endif
 605                 goto done;
 606         }
 607
 608         if ( saslrc == SASL_OK )
 609                 *rmech = NULL;
 610
 611         ccred.bv_len = credlen;
 612
 613         if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
 614                 rc = ldap_sasl_bind( ld, dn, mech, &ccred, sctrls, cctrls, msgid );
 615
 616                 if ( ccred.bv_val != NULL ) {
 617 #if SASL_VERSION_MAJOR < 2
 618                         LDAP_FREE( ccred.bv_val );
 619 #endif
 620                         ccred.bv_val = NULL;
 621                 }
 622                 if ( rc == LDAP_SUCCESS )
 623                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 624                 goto done;
 625         }
 626
 627 success:
 628         /* Conversation was completed successfully by now */
 629         if( flags != LDAP_SASL_QUIET ) {
 630                 char *data;
 631                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 632                         (SASL_CONST void **)(char *) &data );
 633                 if( saslrc == SASL_OK && data && *data ) {
 634                         fprintf( stderr, "SASL username: %s\n", data );
 635                 }
 636
 637 #if SASL_VERSION_MAJOR < 2
 638                 saslrc = sasl_getprop( ctx, SASL_REALM,
 639                         (SASL_CONST void **) &data );
 640                 if( saslrc == SASL_OK && data && *data ) {
 641                         fprintf( stderr, "SASL realm: %s\n", data );
 642                 }
 643 #endif
 644         }
 645
 646         ssf = NULL;
 647         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 648         if( saslrc == SASL_OK ) {
 649                 if( flags != LDAP_SASL_QUIET ) {
 650                         fprintf( stderr, "SASL SSF: %lu\n",
 651                                 (unsigned long) *ssf );
 652                 }
 653
 654                 if( ssf && *ssf ) {
 655                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 656                                 sasl_conn_t     *oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 657                                 sasl_dispose( &oldctx );
 658                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 659                         }
 660                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 661                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 662
 663                         if( flags != LDAP_SASL_QUIET ) {
 664                                 fprintf( stderr, "SASL data security layer installed.\n" );
 665                         }
 666                 }
 667         }
 668         ld->ld_defconn->lconn_sasl_authctx = ctx;
 669
 670 done:
 671         return rc;
 672 }
 673
 674 int
 675 ldap_int_sasl_external(
 676         LDAP *ld,
 677         LDAPConn *conn,
 678         const char * authid,
 679         ber_len_t ssf )
 680 {
 681         int sc;
 682         sasl_conn_t *ctx;
 683 #if SASL_VERSION_MAJOR < 2
 684         sasl_external_properties_t extprops;
 685 #else
 686         sasl_ssf_t sasl_ssf = ssf;
 687 #endif
 688
 689         ctx = conn->lconn_sasl_authctx;
 690
 691         if ( ctx == NULL ) {
 692                 return LDAP_LOCAL_ERROR;
 693         }
 694
 695 #if SASL_VERSION_MAJOR >= 2
 696         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 697         if ( sc == SASL_OK )
 698                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 699 #else
 700         memset( &extprops, '\0', sizeof(extprops) );
 701         extprops.ssf = ssf;
 702         extprops.auth_id = (char *) authid;
 703
 704         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 705                 (void *) &extprops );
 706 #endif
 707
 708         if ( sc != SASL_OK ) {
 709                 return LDAP_LOCAL_ERROR;
 710         }
 711
 712         return LDAP_SUCCESS;
 713 }
 714
 715
 716 #define GOT_MINSSF      1
 717 #define GOT_MAXSSF      2
 718 #define GOT_MAXBUF      4
 719
 720 static struct {
 721         struct berval key;
 722         int sflag;
 723         int ival;
 724         int idef;
 725 } sprops[] = {
 726         { BER_BVC("none"), 0, 0, 0 },
 727         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 728         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 729         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 730         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 731         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 732         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 733         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 734         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 735         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 736         { BER_BVNULL, 0, 0, 0 }
 737 };
 738
 739 void ldap_pvt_sasl_secprops_unparse(
 740         sasl_security_properties_t *secprops,
 741         struct berval *out )
 742 {
 743         int i, l = 0;
 744         int comma;
 745         char *ptr;
 746
 747         if ( secprops == NULL || out == NULL ) {
 748                 return;
 749         }
 750
 751         comma = 0;
 752         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 753                 if ( sprops[i].ival ) {
 754                         int v = 0;
 755
 756                         switch( sprops[i].ival ) {
 757                         case GOT_MINSSF: v = secprops->min_ssf; break;
 758                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 759                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 760                         }
 761                         /* It is the default, ignore it */
 762                         if ( v == sprops[i].idef ) continue;
 763
 764                         l += sprops[i].key.bv_len + 24;
 765                 } else if ( sprops[i].sflag ) {
 766                         if ( sprops[i].sflag & secprops->security_flags ) {
 767                                 l += sprops[i].key.bv_len;
 768                         }
 769                 } else if ( secprops->security_flags == 0 ) {
 770                         l += sprops[i].key.bv_len;
 771                 }
 772                 if ( comma ) l++;
 773                 comma = 1;
 774         }
 775         l++;
 776
 777         out->bv_val = LDAP_MALLOC( l );
 778         if ( out->bv_val == NULL ) {
 779                 out->bv_len = 0;
 780                 return;
 781         }
 782
 783         ptr = out->bv_val;
 784         comma = 0;
 785         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 786                 if ( sprops[i].ival ) {
 787                         int v = 0;
 788
 789                         switch( sprops[i].ival ) {
 790                         case GOT_MINSSF: v = secprops->min_ssf; break;
 791                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 792                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 793                         }
 794                         /* It is the default, ignore it */
 795                         if ( v == sprops[i].idef ) continue;
 796
 797                         if ( comma ) *ptr++ = ',';
 798                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 799                         comma = 1;
 800                 } else if ( sprops[i].sflag ) {
 801                         if ( sprops[i].sflag & secprops->security_flags ) {
 802                                 if ( comma ) *ptr++ = ',';
 803                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 804                                 comma = 1;
 805                         }
 806                 } else if ( secprops->security_flags == 0 ) {
 807                         if ( comma ) *ptr++ = ',';
 808                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 809                         comma = 1;
 810                 }
 811         }
 812         out->bv_len = ptr - out->bv_val;
 813 }
 814
 815 int ldap_pvt_sasl_secprops(
 816         const char *in,
 817         sasl_security_properties_t *secprops )
 818 {
 819         unsigned i, j, l;
 820         char **props;
 821         unsigned sflags = 0;
 822         int got_sflags = 0;
 823         sasl_ssf_t max_ssf = 0;
 824         int got_max_ssf = 0;
 825         sasl_ssf_t min_ssf = 0;
 826         int got_min_ssf = 0;
 827         unsigned maxbufsize = 0;
 828         int got_maxbufsize = 0;
 829
 830         if( secprops == NULL ) {
 831                 return LDAP_PARAM_ERROR;
 832         }
 833         props = ldap_str2charray( in, "," );
 834         if( props == NULL ) {
 835                 return LDAP_PARAM_ERROR;
 836         }
 837
 838         for( i=0; props[i]; i++ ) {
 839                 l = strlen( props[i] );
 840                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 841                         if ( l < sprops[j].key.bv_len ) continue;
 842                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 843                                 sprops[j].key.bv_len )) continue;
 844                         if ( sprops[j].ival ) {
 845                                 unsigned v;
 846                                 char *next = NULL;
 847                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 848                                         continue;
 849                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 850                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 851                                 switch( sprops[j].ival ) {
 852                                 case GOT_MINSSF:
 853                                         min_ssf = v; got_min_ssf++; break;
 854                                 case GOT_MAXSSF:
 855                                         max_ssf = v; got_max_ssf++; break;
 856                                 case GOT_MAXBUF:
 857                                         maxbufsize = v; got_maxbufsize++; break;
 858                                 }
 859                         } else {
 860                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 861                                 if ( sprops[j].sflag )
 862                                         sflags |= sprops[j].sflag;
 863                                 else
 864                                         sflags = 0;
 865                                 got_sflags++;
 866                         }
 867                         break;
 868                 }
 869                 if ( BER_BVISNULL( &sprops[j].key )) {
 870                         ldap_charray_free( props );
 871                         return LDAP_NOT_SUPPORTED;
 872                 }
 873         }
 874
 875         if(got_sflags) {
 876                 secprops->security_flags = sflags;
 877         }
 878         if(got_min_ssf) {
 879                 secprops->min_ssf = min_ssf;
 880         }
 881         if(got_max_ssf) {
 882                 secprops->max_ssf = max_ssf;
 883         }
 884         if(got_maxbufsize) {
 885                 secprops->maxbufsize = maxbufsize;
 886         }
 887
 888         ldap_charray_free( props );
 889         return LDAP_SUCCESS;
 890 }
 891
 892 int
 893 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 894 {
 895         int rc;
 896
 897         switch( option ) {
 898         case LDAP_OPT_X_SASL_SECPROPS:
 899                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 900                 if( rc == LDAP_SUCCESS ) return 0;
 901         }
 902
 903         return -1;
 904 }
 905
 906 int
 907 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 908 {
 909         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 910                 if ( ldap_int_sasl_init() )
 911                         return -1;
 912                 *(char ***)arg = (char **)sasl_global_listmech();
 913                 return 0;
 914         }
 915
 916         if ( ld == NULL )
 917                 return -1;
 918
 919         switch ( option ) {
 920                 case LDAP_OPT_X_SASL_MECH: {
 921                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 922                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 923                 } break;
 924                 case LDAP_OPT_X_SASL_REALM: {
 925                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 926                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 927                 } break;
 928                 case LDAP_OPT_X_SASL_AUTHCID: {
 929                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 930                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 931                 } break;
 932                 case LDAP_OPT_X_SASL_AUTHZID: {
 933                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 934                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 935                 } break;
 936
 937                 case LDAP_OPT_X_SASL_SSF: {
 938                         int sc;
 939                         sasl_ssf_t      *ssf;
 940                         sasl_conn_t *ctx;
 941
 942                         if( ld->ld_defconn == NULL ) {
 943                                 return -1;
 944                         }
 945
 946                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 947
 948                         if ( ctx == NULL ) {
 949                                 return -1;
 950                         }
 951
 952                         sc = sasl_getprop( ctx, SASL_SSF,
 953                                 (SASL_CONST void **)(char *) &ssf );
 954
 955                         if ( sc != SASL_OK ) {
 956                                 return -1;
 957                         }
 958
 959                         *(ber_len_t *)arg = *ssf;
 960                 } break;
 961
 962                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 963                         /* this option is write only */
 964                         return -1;
 965
 966                 case LDAP_OPT_X_SASL_SSF_MIN:
 967                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 968                         break;
 969                 case LDAP_OPT_X_SASL_SSF_MAX:
 970                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 971                         break;
 972                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 973                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 974                         break;
 975                 case LDAP_OPT_X_SASL_NOCANON:
 976                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
 977                         break;
 978
 979                 case LDAP_OPT_X_SASL_USERNAME: {
 980                         int sc;
 981                         char *username;
 982                         sasl_conn_t *ctx;
 983
 984                         if( ld->ld_defconn == NULL ) {
 985                                 return -1;
 986                         }
 987
 988                         ctx = ld->ld_defconn->lconn_sasl_authctx;
 989
 990                         if ( ctx == NULL ) {
 991                                 return -1;
 992                         }
 993
 994                         sc = sasl_getprop( ctx, SASL_USERNAME,
 995                                 (SASL_CONST void **)(char **) &username );
 996
 997                         if ( sc != SASL_OK ) {
 998                                 return -1;
 999                         }
1000
1001                         *(char **)arg = username ? LDAP_STRDUP( username ) : NULL;
1002                 } break;
1003
1004                 case LDAP_OPT_X_SASL_SECPROPS:
1005                         /* this option is write only */
1006                         return -1;
1007
1008 #ifdef SASL_GSS_CREDS
1009                 case LDAP_OPT_X_SASL_GSS_CREDS: {
1010                         sasl_conn_t *ctx;
1011                         int sc;
1012
1013                         if ( ld->ld_defconn == NULL )
1014                                 return -1;
1015
1016                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1017                         if ( ctx == NULL )
1018                                 return -1;
1019
1020                         sc = sasl_getprop( ctx, SASL_GSS_CREDS, arg );
1021                         if ( sc != SASL_OK )
1022                                 return -1;
1023                         }
1024                         break;
1025 #endif
1026
1027                 default:
1028                         return -1;
1029         }
1030         return 0;
1031 }
1032
1033 int
1034 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1035 {
1036         if ( ld == NULL )
1037                 return -1;
1038
1039         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1040                 return -1;
1041
1042         switch ( option ) {
1043         case LDAP_OPT_X_SASL_SSF:
1044         case LDAP_OPT_X_SASL_USERNAME:
1045                 /* This option is read-only */
1046                 return -1;
1047
1048         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1049                 int sc;
1050 #if SASL_VERSION_MAJOR < 2
1051                 sasl_external_properties_t extprops;
1052 #else
1053                 sasl_ssf_t sasl_ssf;
1054 #endif
1055                 sasl_conn_t *ctx;
1056
1057                 if( ld->ld_defconn == NULL ) {
1058                         return -1;
1059                 }
1060
1061                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1062
1063                 if ( ctx == NULL ) {
1064                         return -1;
1065                 }
1066
1067 #if SASL_VERSION_MAJOR >= 2
1068                 sasl_ssf = * (ber_len_t *)arg;
1069                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1070 #else
1071                 memset(&extprops, 0L, sizeof(extprops));
1072
1073                 extprops.ssf = * (ber_len_t *) arg;
1074
1075                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1076                         (void *) &extprops );
1077 #endif
1078
1079                 if ( sc != SASL_OK ) {
1080                         return -1;
1081                 }
1082                 } break;
1083
1084         case LDAP_OPT_X_SASL_SSF_MIN:
1085                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1086                 break;
1087         case LDAP_OPT_X_SASL_SSF_MAX:
1088                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1089                 break;
1090         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1091                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1092                 break;
1093         case LDAP_OPT_X_SASL_NOCANON:
1094                 if ( arg == LDAP_OPT_OFF ) {
1095                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1096                 } else {
1097                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1098                 }
1099                 break;
1100
1101         case LDAP_OPT_X_SASL_SECPROPS: {
1102                 int sc;
1103                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1104                         &ld->ld_options.ldo_sasl_secprops );
1105
1106                 return sc == LDAP_SUCCESS ? 0 : -1;
1107                 }
1108
1109 #ifdef SASL_GSS_CREDS
1110         case LDAP_OPT_X_SASL_GSS_CREDS: {
1111                 sasl_conn_t *ctx;
1112                 int sc;
1113
1114                 if ( ld->ld_defconn == NULL )
1115                         return -1;
1116
1117                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1118                 if ( ctx == NULL )
1119                         return -1;
1120
1121                 sc = sasl_setprop( ctx, SASL_GSS_CREDS, arg );
1122                 if ( sc != SASL_OK )
1123                         return -1;
1124                 }
1125                 break;
1126 #endif
1127
1128         default:
1129                 return -1;
1130         }
1131         return 0;
1132 }
1133
1134 #ifdef LDAP_R_COMPILE
1135 #define LDAP_DEBUG_R_SASL
1136 void *ldap_pvt_sasl_mutex_new(void)
1137 {
1138         ldap_pvt_thread_mutex_t *mutex;
1139
1140         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1141                 sizeof(ldap_pvt_thread_mutex_t) );
1142
1143         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1144                 return mutex;
1145         }
1146 #ifndef LDAP_DEBUG_R_SASL
1147         assert( 0 );
1148 #endif /* !LDAP_DEBUG_R_SASL */
1149         return NULL;
1150 }
1151
1152 int ldap_pvt_sasl_mutex_lock(void *mutex)
1153 {
1154 #ifdef LDAP_DEBUG_R_SASL
1155         if ( mutex == NULL ) {
1156                 return SASL_OK;
1157         }
1158 #else /* !LDAP_DEBUG_R_SASL */
1159         assert( mutex != NULL );
1160 #endif /* !LDAP_DEBUG_R_SASL */
1161         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1162                 ? SASL_FAIL : SASL_OK;
1163 }
1164
1165 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1166 {
1167 #ifdef LDAP_DEBUG_R_SASL
1168         if ( mutex == NULL ) {
1169                 return SASL_OK;
1170         }
1171 #else /* !LDAP_DEBUG_R_SASL */
1172         assert( mutex != NULL );
1173 #endif /* !LDAP_DEBUG_R_SASL */
1174         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1175                 ? SASL_FAIL : SASL_OK;
1176 }
1177
1178 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1179 {
1180 #ifdef LDAP_DEBUG_R_SASL
1181         if ( mutex == NULL ) {
1182                 return;
1183         }
1184 #else /* !LDAP_DEBUG_R_SASL */
1185         assert( mutex != NULL );
1186 #endif /* !LDAP_DEBUG_R_SASL */
1187         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1188         LDAP_FREE( mutex );
1189 }
1190 #endif
1191
1192 #else
1193 int ldap_int_sasl_init( void )
1194 { return LDAP_SUCCESS; }
1195
1196 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1197 { return LDAP_SUCCESS; }
1198
1199 int
1200 ldap_int_sasl_bind(
1201         LDAP                    *ld,
1202         const char              *dn,
1203         const char              *mechs,
1204         LDAPControl             **sctrls,
1205         LDAPControl             **cctrls,
1206         unsigned                flags,
1207         LDAP_SASL_INTERACT_PROC *interact,
1208         void                    *defaults,
1209         LDAPMessage             *result,
1210         const char              **rmech,
1211         int                             *msgid )
1212 { return LDAP_NOT_SUPPORTED; }
1213
1214 int
1215 ldap_int_sasl_external(
1216         LDAP *ld,
1217         LDAPConn *conn,
1218         const char * authid,
1219         ber_len_t ssf )
1220 { return LDAP_SUCCESS; }
1221
1222 #endif /* HAVE_CYRUS_SASL */