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 1998-2018 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 /*
  73  * ldap_int_initialize is responsible for calling this only once.
  74  */
  75 int ldap_int_sasl_init( void )
  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
 100 /* SASL 2 takes care of its own memory completely internally */
 101 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
 102         sasl_set_alloc(
 103                 ber_memalloc,
 104                 ber_memcalloc,
 105                 ber_memrealloc,
 106                 ber_memfree );
 107 #endif /* CSRIMALLOC */
 108
 109 #ifdef LDAP_R_COMPILE
 110         sasl_set_mutex(
 111                 ldap_pvt_sasl_mutex_new,
 112                 ldap_pvt_sasl_mutex_lock,
 113                 ldap_pvt_sasl_mutex_unlock,
 114                 ldap_pvt_sasl_mutex_dispose );
 115 #endif
 116
 117         if ( sasl_client_init( NULL ) == SASL_OK ) {
 118                 return 0;
 119         }
 120
 121 #if SASL_VERSION_MAJOR < 2
 122         /* A no-op to make sure we link with Cyrus 1.5 */
 123         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
 124 #endif
 125         return -1;
 126 }
 127
 128 static void
 129 sb_sasl_cyrus_init(
 130         struct sb_sasl_generic_data *p,
 131         ber_len_t *min_send,
 132         ber_len_t *max_send,
 133         ber_len_t *max_recv)
 134 {
 135         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 136         ber_len_t maxbuf;
 137
 138         sasl_getprop( sasl_context, SASL_MAXOUTBUF,
 139                       (SASL_CONST void **)(char *) &maxbuf );
 140
 141         *min_send = SASL_MIN_BUFF_SIZE;
 142         *max_send = maxbuf;
 143         *max_recv = SASL_MAX_BUFF_SIZE;
 144 }
 145
 146 static ber_int_t
 147 sb_sasl_cyrus_encode(
 148         struct sb_sasl_generic_data *p,
 149         unsigned char *buf,
 150         ber_len_t len,
 151         Sockbuf_Buf *dst)
 152 {
 153         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 154         ber_int_t ret;
 155         unsigned tmpsize = dst->buf_size;
 156
 157         ret = sasl_encode( sasl_context, (char *)buf, len,
 158                            (SASL_CONST char **)&dst->buf_base,
 159                            &tmpsize );
 160
 161         dst->buf_size = tmpsize;
 162         dst->buf_end = dst->buf_size;
 163
 164         if ( ret != SASL_OK ) {
 165                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
 166                                 "sb_sasl_cyrus_encode: failed to encode packet: %s\n",
 167                                 sasl_errstring( ret, NULL, NULL ) );
 168                 return -1;
 169         }
 170
 171         return 0;
 172 }
 173
 174 static ber_int_t
 175 sb_sasl_cyrus_decode(
 176         struct sb_sasl_generic_data *p,
 177         const Sockbuf_Buf *src,
 178         Sockbuf_Buf *dst)
 179 {
 180         sasl_conn_t *sasl_context = (sasl_conn_t *)p->ops_private;
 181         ber_int_t ret;
 182         unsigned tmpsize = dst->buf_size;
 183
 184         ret = sasl_decode( sasl_context,
 185                            src->buf_base, src->buf_end,
 186                            (SASL_CONST char **)&dst->buf_base,
 187                            (unsigned *)&tmpsize );
 188
 189
 190         dst->buf_size = tmpsize;
 191         dst->buf_end = dst->buf_size;
 192
 193         if ( ret != SASL_OK ) {
 194                 ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
 195                                 "sb_sasl_cyrus_decode: failed to decode packet: %s\n",
 196                                 sasl_errstring( ret, NULL, NULL ) );
 197                 return -1;
 198         }
 199
 200         return 0;
 201 }
 202
 203 static void
 204 sb_sasl_cyrus_reset_buf(
 205         struct sb_sasl_generic_data *p,
 206         Sockbuf_Buf *buf)
 207 {
 208 #if SASL_VERSION_MAJOR >= 2
 209         ber_pvt_sb_buf_init( buf );
 210 #else
 211         ber_pvt_sb_buf_destroy( buf );
 212 #endif
 213 }
 214
 215 static void
 216 sb_sasl_cyrus_fini(
 217         struct sb_sasl_generic_data *p)
 218 {
 219 #if SASL_VERSION_MAJOR >= 2
 220         /*
 221          * SASLv2 encode/decode buffers are managed by
 222          * libsasl2. Ensure they are not freed by liblber.
 223          */
 224         p->buf_in.buf_base = NULL;
 225         p->buf_out.buf_base = NULL;
 226 #endif
 227 }
 228
 229 static const struct sb_sasl_generic_ops sb_sasl_cyrus_ops = {
 230         sb_sasl_cyrus_init,
 231         sb_sasl_cyrus_encode,
 232         sb_sasl_cyrus_decode,
 233         sb_sasl_cyrus_reset_buf,
 234         sb_sasl_cyrus_fini
 235  };
 236
 237 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 238 {
 239         struct sb_sasl_generic_install install_arg;
 240
 241         install_arg.ops         = &sb_sasl_cyrus_ops;
 242         install_arg.ops_private = ctx_arg;
 243
 244         return ldap_pvt_sasl_generic_install( sb, &install_arg );
 245 }
 246
 247 void ldap_pvt_sasl_remove( Sockbuf *sb )
 248 {
 249         ldap_pvt_sasl_generic_remove( sb );
 250 }
 251
 252 static int
 253 sasl_err2ldap( int saslerr )
 254 {
 255         int rc;
 256
 257         /* map SASL errors to LDAP API errors returned by:
 258          *      sasl_client_new()
 259          *              SASL_OK, SASL_NOMECH, SASL_NOMEM
 260          *      sasl_client_start()
 261          *              SASL_OK, SASL_NOMECH, SASL_NOMEM, SASL_INTERACT
 262          *      sasl_client_step()
 263          *              SASL_OK, SASL_INTERACT, SASL_BADPROT, SASL_BADSERV
 264          */
 265
 266         switch (saslerr) {
 267                 case SASL_CONTINUE:
 268                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 269                         break;
 270                 case SASL_INTERACT:
 271                         rc = LDAP_LOCAL_ERROR;
 272                         break;
 273                 case SASL_OK:
 274                         rc = LDAP_SUCCESS;
 275                         break;
 276                 case SASL_NOMEM:
 277                         rc = LDAP_NO_MEMORY;
 278                         break;
 279                 case SASL_NOMECH:
 280                         rc = LDAP_AUTH_UNKNOWN;
 281                         break;
 282                 case SASL_BADPROT:
 283                         rc = LDAP_DECODING_ERROR;
 284                         break;
 285                 case SASL_BADSERV:
 286                         rc = LDAP_AUTH_UNKNOWN;
 287                         break;
 288
 289                 /* other codes */
 290                 case SASL_BADAUTH:
 291                         rc = LDAP_AUTH_UNKNOWN;
 292                         break;
 293                 case SASL_NOAUTHZ:
 294                         rc = LDAP_PARAM_ERROR;
 295                         break;
 296                 case SASL_FAIL:
 297                         rc = LDAP_LOCAL_ERROR;
 298                         break;
 299                 case SASL_TOOWEAK:
 300                 case SASL_ENCRYPT:
 301                         rc = LDAP_AUTH_UNKNOWN;
 302                         break;
 303                 default:
 304                         rc = LDAP_LOCAL_ERROR;
 305                         break;
 306         }
 307
 308         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 309         return rc;
 310 }
 311
 312 int
 313 ldap_int_sasl_open(
 314         LDAP *ld,
 315         LDAPConn *lc,
 316         const char * host )
 317 {
 318         int rc;
 319         sasl_conn_t *ctx;
 320
 321         assert( lc->lconn_sasl_authctx == NULL );
 322
 323         if ( host == NULL ) {
 324                 ld->ld_errno = LDAP_LOCAL_ERROR;
 325                 return ld->ld_errno;
 326         }
 327
 328 #if SASL_VERSION_MAJOR >= 2
 329         rc = sasl_client_new( "ldap", host, NULL, NULL,
 330                 client_callbacks, 0, &ctx );
 331 #else
 332         rc = sasl_client_new( "ldap", host, client_callbacks,
 333                 SASL_SECURITY_LAYER, &ctx );
 334 #endif
 335
 336         if ( rc != SASL_OK ) {
 337                 ld->ld_errno = sasl_err2ldap( rc );
 338                 return ld->ld_errno;
 339         }
 340
 341         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 342                 host, 0, 0 );
 343
 344         lc->lconn_sasl_authctx = ctx;
 345
 346         return LDAP_SUCCESS;
 347 }
 348
 349 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 350 {
 351         sasl_conn_t *ctx = lc->lconn_sasl_authctx;
 352
 353         if( ctx != NULL ) {
 354                 sasl_dispose( &ctx );
 355                 if ( lc->lconn_sasl_sockctx &&
 356                         lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
 357                         ctx = lc->lconn_sasl_sockctx;
 358                         sasl_dispose( &ctx );
 359                 }
 360                 lc->lconn_sasl_sockctx = NULL;
 361                 lc->lconn_sasl_authctx = NULL;
 362         }
 363         if( lc->lconn_sasl_cbind ) {
 364                 ldap_memfree( lc->lconn_sasl_cbind );
 365                 lc->lconn_sasl_cbind = NULL;
 366         }
 367
 368         return LDAP_SUCCESS;
 369 }
 370
 371 int
 372 ldap_int_sasl_bind(
 373         LDAP                    *ld,
 374         const char              *dn,
 375         const char              *mechs,
 376         LDAPControl             **sctrls,
 377         LDAPControl             **cctrls,
 378         unsigned                flags,
 379         LDAP_SASL_INTERACT_PROC *interact,
 380         void                    *defaults,
 381         LDAPMessage             *result,
 382         const char              **rmech,
 383         int                             *msgid )
 384 {
 385         const char              *mech;
 386         sasl_ssf_t              *ssf;
 387         sasl_conn_t             *ctx;
 388         sasl_interact_t *prompts = NULL;
 389         struct berval   ccred = BER_BVNULL;
 390         int saslrc, rc;
 391         unsigned credlen;
 392
 393         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 394                 mechs ? mechs : "<null>", 0, 0 );
 395
 396         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 397         if (ld->ld_version < LDAP_VERSION3) {
 398                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 399                 return ld->ld_errno;
 400         }
 401
 402         /* Starting a Bind */
 403         if ( !result ) {
 404                 const char *pmech = NULL;
 405                 sasl_conn_t     *oldctx;
 406                 ber_socket_t            sd;
 407                 void    *ssl;
 408
 409                 rc = 0;
 410                 LDAP_MUTEX_LOCK( &ld->ld_conn_mutex );
 411                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 412
 413                 if ( sd == AC_SOCKET_INVALID || !ld->ld_defconn ) {
 414                         /* not connected yet */
 415
 416                         rc = ldap_open_defconn( ld );
 417
 418                         if ( rc == 0 ) {
 419                                 ber_sockbuf_ctrl( ld->ld_defconn->lconn_sb,
 420                                         LBER_SB_OPT_GET_FD, &sd );
 421
 422                                 if( sd == AC_SOCKET_INVALID ) {
 423                                         ld->ld_errno = LDAP_LOCAL_ERROR;
 424                                         rc = ld->ld_errno;
 425                                 }
 426                         }
 427                 }
 428                 if ( rc == 0 && ld->ld_defconn &&
 429                         ld->ld_defconn->lconn_status == LDAP_CONNST_CONNECTING ) {
 430                         rc = ldap_int_check_async_open( ld, sd );
 431                 }
 432                 LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
 433                 if( rc != 0 ) return ld->ld_errno;
 434
 435                 oldctx = ld->ld_defconn->lconn_sasl_authctx;
 436
 437                 /* If we already have an authentication context, clear it out */
 438                 if( oldctx ) {
 439                         if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
 440                                 sasl_dispose( &oldctx );
 441                         }
 442                         ld->ld_defconn->lconn_sasl_authctx = NULL;
 443                 }
 444
 445                 {
 446                         char *saslhost;
 447                         int nocanon = (int)LDAP_BOOL_GET( &ld->ld_options,
 448                                 LDAP_BOOL_SASL_NOCANON );
 449
 450                         /* If we don't need to canonicalize just use the host
 451                          * from the LDAP URI.
 452                          */
 453                         if ( nocanon )
 454                                 saslhost = ld->ld_defconn->lconn_server->lud_host;
 455                         else
 456                                 saslhost = ldap_host_connected_to( ld->ld_defconn->lconn_sb,
 457                                 "localhost" );
 458                         rc = ldap_int_sasl_open( ld, ld->ld_defconn, saslhost );
 459                         if ( !nocanon )
 460                                 LDAP_FREE( saslhost );
 461                 }
 462
 463                 if ( rc != LDAP_SUCCESS ) return rc;
 464
 465                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 466
 467 #ifdef HAVE_TLS
 468                 /* Check for TLS */
 469                 ssl = ldap_pvt_tls_sb_ctx( ld->ld_defconn->lconn_sb );
 470                 if ( ssl ) {
 471                         struct berval authid = BER_BVNULL;
 472                         ber_len_t fac;
 473
 474                         fac = ldap_pvt_tls_get_strength( ssl );
 475                         /* failure is OK, we just can't use SASL EXTERNAL */
 476                         (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 477
 478                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 479                         LDAP_FREE( authid.bv_val );
 480 #ifdef SASL_CHANNEL_BINDING     /* 2.1.25+ */
 481                         {
 482                                 char cbinding[64];
 483                                 struct berval cbv = { sizeof(cbinding), cbinding };
 484                                 if ( ldap_pvt_tls_get_unique( ssl, &cbv, 0 )) {
 485                                         sasl_channel_binding_t *cb = ldap_memalloc( sizeof(*cb) +
 486                                                 cbv.bv_len);
 487                                         void *cb_data; /* used since cb->data is const* */
 488                                         cb->name = "ldap";
 489                                         cb->critical = 0;
 490                                         cb->len = cbv.bv_len;
 491                                         cb->data = cb_data = cb+1;
 492                                         memcpy( cb_data, cbv.bv_val, cbv.bv_len );
 493                                         sasl_setprop( ld->ld_defconn->lconn_sasl_authctx,
 494                                                 SASL_CHANNEL_BINDING, cb );
 495                                         ld->ld_defconn->lconn_sasl_cbind = cb;
 496                                 }
 497                         }
 498 #endif
 499                 }
 500 #endif
 501
 502 #if !defined(_WIN32)
 503                 /* Check for local */
 504                 if ( ldap_pvt_url_scheme2proto(
 505                         ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC )
 506                 {
 507                         char authid[sizeof("gidNumber=4294967295+uidNumber=4294967295,"
 508                                 "cn=peercred,cn=external,cn=auth")];
 509                         sprintf( authid, "gidNumber=%u+uidNumber=%u,"
 510                                 "cn=peercred,cn=external,cn=auth",
 511                                 getegid(), geteuid() );
 512                         (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid,
 513                                 LDAP_PVT_SASL_LOCAL_SSF );
 514                 }
 515 #endif
 516
 517                 /* (re)set security properties */
 518                 sasl_setprop( ctx, SASL_SEC_PROPS,
 519                         &ld->ld_options.ldo_sasl_secprops );
 520
 521                 mech = NULL;
 522
 523                 do {
 524                         saslrc = sasl_client_start( ctx,
 525                                 mechs,
 526 #if SASL_VERSION_MAJOR < 2
 527                                 NULL,
 528 #endif
 529                                 &prompts,
 530                                 (SASL_CONST char **)&ccred.bv_val,
 531                                 &credlen,
 532                                 &mech );
 533
 534                         if( pmech == NULL && mech != NULL ) {
 535                                 pmech = mech;
 536                                 *rmech = mech;
 537
 538                                 if( flags != LDAP_SASL_QUIET ) {
 539                                         fprintf(stderr,
 540                                                 "SASL/%s authentication started\n",
 541                                                 pmech );
 542                                 }
 543                         }
 544
 545                         if( saslrc == SASL_INTERACT ) {
 546                                 int res;
 547                                 if( !interact ) break;
 548                                 res = (interact)( ld, flags, defaults, prompts );
 549
 550                                 if( res != LDAP_SUCCESS ) break;
 551                         }
 552                 } while ( saslrc == SASL_INTERACT );
 553                 rc = LDAP_SASL_BIND_IN_PROGRESS;
 554
 555         } else {
 556                 /* continuing an in-progress Bind */
 557                 struct berval *scred = NULL;
 558
 559                 ctx = ld->ld_defconn->lconn_sasl_authctx;
 560
 561                 rc = ldap_parse_sasl_bind_result( ld, result, &scred, 0 );
 562                 if ( rc != LDAP_SUCCESS ) {
 563                         if ( scred )
 564                                 ber_bvfree( scred );
 565                         goto done;
 566                 }
 567
 568                 rc = ldap_result2error( ld, result, 0 );
 569                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 570                         if( scred ) {
 571                                 /* and server provided us with data? */
 572                                 Debug( LDAP_DEBUG_TRACE,
 573                                         "ldap_int_sasl_bind: rc=%d len=%ld\n",
 574                                         rc, scred ? (long) scred->bv_len : -1L, 0 );
 575                                 ber_bvfree( scred );
 576                                 scred = NULL;
 577                         }
 578                         goto done;
 579                 }
 580
 581                 mech = *rmech;
 582                 if ( rc == LDAP_SUCCESS && mech == NULL ) {
 583                         if ( scred )
 584                                 ber_bvfree( scred );
 585                         goto success;
 586                 }
 587
 588                 do {
 589                         if( ! scred ) {
 590                                 /* no data! */
 591                                 Debug( LDAP_DEBUG_TRACE,
 592                                         "ldap_int_sasl_bind: no data in step!\n",
 593                                         0, 0, 0 );
 594                         }
 595
 596                         saslrc = sasl_client_step( ctx,
 597                                 (scred == NULL) ? NULL : scred->bv_val,
 598                                 (scred == NULL) ? 0 : scred->bv_len,
 599                                 &prompts,
 600                                 (SASL_CONST char **)&ccred.bv_val,
 601                                 &credlen );
 602
 603                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 604                                 saslrc, 0, 0 );
 605
 606                         if( saslrc == SASL_INTERACT ) {
 607                                 int res;
 608                                 if( !interact ) break;
 609                                 res = (interact)( ld, flags, defaults, prompts );
 610                                 if( res != LDAP_SUCCESS ) break;
 611                         }
 612                 } while ( saslrc == SASL_INTERACT );
 613
 614                 ber_bvfree( scred );
 615         }
 616
 617         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 618                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 619 #if SASL_VERSION_MAJOR >= 2
 620                 if ( ld->ld_error ) {
 621                         LDAP_FREE( ld->ld_error );
 622                 }
 623                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 624 #endif
 625                 goto done;
 626         }
 627
 628         if ( saslrc == SASL_OK )
 629                 *rmech = NULL;
 630
 631         ccred.bv_len = credlen;
 632
 633         if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
 634                 rc = ldap_sasl_bind( ld, dn, mech, &ccred, sctrls, cctrls, msgid );
 635
 636                 if ( ccred.bv_val != NULL ) {
 637 #if SASL_VERSION_MAJOR < 2
 638                         LDAP_FREE( ccred.bv_val );
 639 #endif
 640                         ccred.bv_val = NULL;
 641                 }
 642                 if ( rc == LDAP_SUCCESS )
 643                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 644                 goto done;
 645         }
 646
 647 success:
 648         /* Conversation was completed successfully by now */
 649         if( flags != LDAP_SASL_QUIET ) {
 650                 char *data;
 651                 saslrc = sasl_getprop( ctx, SASL_USERNAME,
 652                         (SASL_CONST void **)(char *) &data );
 653                 if( saslrc == SASL_OK && data && *data ) {
 654                         fprintf( stderr, "SASL username: %s\n", data );
 655                 }
 656
 657 #if SASL_VERSION_MAJOR < 2
 658                 saslrc = sasl_getprop( ctx, SASL_REALM,
 659                         (SASL_CONST void **) &data );
 660                 if( saslrc == SASL_OK && data && *data ) {
 661                         fprintf( stderr, "SASL realm: %s\n", data );
 662                 }
 663 #endif
 664         }
 665
 666         ssf = NULL;
 667         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **)(char *) &ssf );
 668         if( saslrc == SASL_OK ) {
 669                 if( flags != LDAP_SASL_QUIET ) {
 670                         fprintf( stderr, "SASL SSF: %lu\n",
 671                                 (unsigned long) *ssf );
 672                 }
 673
 674                 if( ssf && *ssf ) {
 675                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 676                                 sasl_conn_t     *oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 677                                 sasl_dispose( &oldctx );
 678                                 ldap_pvt_sasl_remove( ld->ld_defconn->lconn_sb );
 679                         }
 680                         ldap_pvt_sasl_install( ld->ld_defconn->lconn_sb, ctx );
 681                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 682
 683                         if( flags != LDAP_SASL_QUIET ) {
 684                                 fprintf( stderr, "SASL data security layer installed.\n" );
 685                         }
 686                 }
 687         }
 688         ld->ld_defconn->lconn_sasl_authctx = ctx;
 689
 690 done:
 691         return rc;
 692 }
 693
 694 int
 695 ldap_int_sasl_external(
 696         LDAP *ld,
 697         LDAPConn *conn,
 698         const char * authid,
 699         ber_len_t ssf )
 700 {
 701         int sc;
 702         sasl_conn_t *ctx;
 703 #if SASL_VERSION_MAJOR < 2
 704         sasl_external_properties_t extprops;
 705 #else
 706         sasl_ssf_t sasl_ssf = ssf;
 707 #endif
 708
 709         ctx = conn->lconn_sasl_authctx;
 710
 711         if ( ctx == NULL ) {
 712                 return LDAP_LOCAL_ERROR;
 713         }
 714
 715 #if SASL_VERSION_MAJOR >= 2
 716         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
 717         if ( sc == SASL_OK )
 718                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 719 #else
 720         memset( &extprops, '\0', sizeof(extprops) );
 721         extprops.ssf = ssf;
 722         extprops.auth_id = (char *) authid;
 723
 724         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 725                 (void *) &extprops );
 726 #endif
 727
 728         if ( sc != SASL_OK ) {
 729                 return LDAP_LOCAL_ERROR;
 730         }
 731
 732         return LDAP_SUCCESS;
 733 }
 734
 735
 736 #define GOT_MINSSF      1
 737 #define GOT_MAXSSF      2
 738 #define GOT_MAXBUF      4
 739
 740 static struct {
 741         struct berval key;
 742         int sflag;
 743         int ival;
 744         int idef;
 745 } sprops[] = {
 746         { BER_BVC("none"), 0, 0, 0 },
 747         { BER_BVC("nodict"), SASL_SEC_NODICTIONARY, 0, 0 },
 748         { BER_BVC("noplain"), SASL_SEC_NOPLAINTEXT, 0, 0 },
 749         { BER_BVC("noactive"), SASL_SEC_NOACTIVE, 0, 0 },
 750         { BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 751         { BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 752         { BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
 753         { BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 754         { BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 755         { BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },
 756         { BER_BVNULL, 0, 0, 0 }
 757 };
 758
 759 void ldap_pvt_sasl_secprops_unparse(
 760         sasl_security_properties_t *secprops,
 761         struct berval *out )
 762 {
 763         int i, l = 0;
 764         int comma;
 765         char *ptr;
 766
 767         if ( secprops == NULL || out == NULL ) {
 768                 return;
 769         }
 770
 771         comma = 0;
 772         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 773                 if ( sprops[i].ival ) {
 774                         int v = 0;
 775
 776                         switch( sprops[i].ival ) {
 777                         case GOT_MINSSF: v = secprops->min_ssf; break;
 778                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 779                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 780                         }
 781                         /* It is the default, ignore it */
 782                         if ( v == sprops[i].idef ) continue;
 783
 784                         l += sprops[i].key.bv_len + 24;
 785                 } else if ( sprops[i].sflag ) {
 786                         if ( sprops[i].sflag & secprops->security_flags ) {
 787                                 l += sprops[i].key.bv_len;
 788                         }
 789                 } else if ( secprops->security_flags == 0 ) {
 790                         l += sprops[i].key.bv_len;
 791                 }
 792                 if ( comma ) l++;
 793                 comma = 1;
 794         }
 795         l++;
 796
 797         out->bv_val = LDAP_MALLOC( l );
 798         if ( out->bv_val == NULL ) {
 799                 out->bv_len = 0;
 800                 return;
 801         }
 802
 803         ptr = out->bv_val;
 804         comma = 0;
 805         for ( i=0; !BER_BVISNULL( &sprops[i].key ); i++ ) {
 806                 if ( sprops[i].ival ) {
 807                         int v = 0;
 808
 809                         switch( sprops[i].ival ) {
 810                         case GOT_MINSSF: v = secprops->min_ssf; break;
 811                         case GOT_MAXSSF: v = secprops->max_ssf; break;
 812                         case GOT_MAXBUF: v = secprops->maxbufsize; break;
 813                         }
 814                         /* It is the default, ignore it */
 815                         if ( v == sprops[i].idef ) continue;
 816
 817                         if ( comma ) *ptr++ = ',';
 818                         ptr += sprintf(ptr, "%s%d", sprops[i].key.bv_val, v );
 819                         comma = 1;
 820                 } else if ( sprops[i].sflag ) {
 821                         if ( sprops[i].sflag & secprops->security_flags ) {
 822                                 if ( comma ) *ptr++ = ',';
 823                                 ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 824                                 comma = 1;
 825                         }
 826                 } else if ( secprops->security_flags == 0 ) {
 827                         if ( comma ) *ptr++ = ',';
 828                         ptr += sprintf(ptr, "%s", sprops[i].key.bv_val );
 829                         comma = 1;
 830                 }
 831         }
 832         out->bv_len = ptr - out->bv_val;
 833 }
 834
 835 int ldap_pvt_sasl_secprops(
 836         const char *in,
 837         sasl_security_properties_t *secprops )
 838 {
 839         unsigned i, j, l;
 840         char **props;
 841         unsigned sflags = 0;
 842         int got_sflags = 0;
 843         sasl_ssf_t max_ssf = 0;
 844         int got_max_ssf = 0;
 845         sasl_ssf_t min_ssf = 0;
 846         int got_min_ssf = 0;
 847         unsigned maxbufsize = 0;
 848         int got_maxbufsize = 0;
 849
 850         if( secprops == NULL ) {
 851                 return LDAP_PARAM_ERROR;
 852         }
 853         props = ldap_str2charray( in, "," );
 854         if( props == NULL ) {
 855                 return LDAP_PARAM_ERROR;
 856         }
 857
 858         for( i=0; props[i]; i++ ) {
 859                 l = strlen( props[i] );
 860                 for ( j=0; !BER_BVISNULL( &sprops[j].key ); j++ ) {
 861                         if ( l < sprops[j].key.bv_len ) continue;
 862                         if ( strncasecmp( props[i], sprops[j].key.bv_val,
 863                                 sprops[j].key.bv_len )) continue;
 864                         if ( sprops[j].ival ) {
 865                                 unsigned v;
 866                                 char *next = NULL;
 867                                 if ( !isdigit( (unsigned char)props[i][sprops[j].key.bv_len] ))
 868                                         continue;
 869                                 v = strtoul( &props[i][sprops[j].key.bv_len], &next, 10 );
 870                                 if ( next == &props[i][sprops[j].key.bv_len] || next[0] != '\0' ) continue;
 871                                 switch( sprops[j].ival ) {
 872                                 case GOT_MINSSF:
 873                                         min_ssf = v; got_min_ssf++; break;
 874                                 case GOT_MAXSSF:
 875                                         max_ssf = v; got_max_ssf++; break;
 876                                 case GOT_MAXBUF:
 877                                         maxbufsize = v; got_maxbufsize++; break;
 878                                 }
 879                         } else {
 880                                 if ( props[i][sprops[j].key.bv_len] ) continue;
 881                                 if ( sprops[j].sflag )
 882                                         sflags |= sprops[j].sflag;
 883                                 else
 884                                         sflags = 0;
 885                                 got_sflags++;
 886                         }
 887                         break;
 888                 }
 889                 if ( BER_BVISNULL( &sprops[j].key )) {
 890                         ldap_charray_free( props );
 891                         return LDAP_NOT_SUPPORTED;
 892                 }
 893         }
 894
 895         if(got_sflags) {
 896                 secprops->security_flags = sflags;
 897         }
 898         if(got_min_ssf) {
 899                 secprops->min_ssf = min_ssf;
 900         }
 901         if(got_max_ssf) {
 902                 secprops->max_ssf = max_ssf;
 903         }
 904         if(got_maxbufsize) {
 905                 secprops->maxbufsize = maxbufsize;
 906         }
 907
 908         ldap_charray_free( props );
 909         return LDAP_SUCCESS;
 910 }
 911
 912 int
 913 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 914 {
 915         int rc;
 916
 917         switch( option ) {
 918         case LDAP_OPT_X_SASL_SECPROPS:
 919                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 920                 if( rc == LDAP_SUCCESS ) return 0;
 921         }
 922
 923         return -1;
 924 }
 925
 926 int
 927 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 928 {
 929         if ( option == LDAP_OPT_X_SASL_MECHLIST ) {
 930                 *(char ***)arg = (char **)sasl_global_listmech();
 931                 return 0;
 932         }
 933
 934         if ( ld == NULL )
 935                 return -1;
 936
 937         switch ( option ) {
 938                 case LDAP_OPT_X_SASL_MECH: {
 939                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 940                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 941                 } break;
 942                 case LDAP_OPT_X_SASL_REALM: {
 943                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 944                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 945                 } break;
 946                 case LDAP_OPT_X_SASL_AUTHCID: {
 947                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 948                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 949                 } break;
 950                 case LDAP_OPT_X_SASL_AUTHZID: {
 951                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 952                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 953                 } break;
 954
 955                 case LDAP_OPT_X_SASL_SSF: {
 956                         int sc;
 957                         sasl_ssf_t      *ssf;
 958                         sasl_conn_t *ctx;
 959
 960                         if( ld->ld_defconn == NULL ) {
 961                                 return -1;
 962                         }
 963
 964                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
 965
 966                         if ( ctx == NULL ) {
 967                                 return -1;
 968                         }
 969
 970                         sc = sasl_getprop( ctx, SASL_SSF,
 971                                 (SASL_CONST void **)(char *) &ssf );
 972
 973                         if ( sc != SASL_OK ) {
 974                                 return -1;
 975                         }
 976
 977                         *(ber_len_t *)arg = *ssf;
 978                 } break;
 979
 980                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 981                         /* this option is write only */
 982                         return -1;
 983
 984                 case LDAP_OPT_X_SASL_SSF_MIN:
 985                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 986                         break;
 987                 case LDAP_OPT_X_SASL_SSF_MAX:
 988                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 989                         break;
 990                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 991                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 992                         break;
 993                 case LDAP_OPT_X_SASL_NOCANON:
 994                         *(int *)arg = (int) LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
 995                         break;
 996
 997                 case LDAP_OPT_X_SASL_USERNAME: {
 998                         int sc;
 999                         char *username;
1000                         sasl_conn_t *ctx;
1001
1002                         if( ld->ld_defconn == NULL ) {
1003                                 return -1;
1004                         }
1005
1006                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1007
1008                         if ( ctx == NULL ) {
1009                                 return -1;
1010                         }
1011
1012                         sc = sasl_getprop( ctx, SASL_USERNAME,
1013                                 (SASL_CONST void **)(char **) &username );
1014
1015                         if ( sc != SASL_OK ) {
1016                                 return -1;
1017                         }
1018
1019                         *(char **)arg = username ? LDAP_STRDUP( username ) : NULL;
1020                 } break;
1021
1022                 case LDAP_OPT_X_SASL_SECPROPS:
1023                         /* this option is write only */
1024                         return -1;
1025
1026 #ifdef SASL_GSS_CREDS
1027                 case LDAP_OPT_X_SASL_GSS_CREDS: {
1028                         sasl_conn_t *ctx;
1029                         int sc;
1030
1031                         if ( ld->ld_defconn == NULL )
1032                                 return -1;
1033
1034                         ctx = ld->ld_defconn->lconn_sasl_authctx;
1035                         if ( ctx == NULL )
1036                                 return -1;
1037
1038                         sc = sasl_getprop( ctx, SASL_GSS_CREDS, arg );
1039                         if ( sc != SASL_OK )
1040                                 return -1;
1041                         }
1042                         break;
1043 #endif
1044
1045                 default:
1046                         return -1;
1047         }
1048         return 0;
1049 }
1050
1051 int
1052 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1053 {
1054         if ( ld == NULL )
1055                 return -1;
1056
1057         if ( arg == NULL && option != LDAP_OPT_X_SASL_NOCANON )
1058                 return -1;
1059
1060         switch ( option ) {
1061         case LDAP_OPT_X_SASL_SSF:
1062         case LDAP_OPT_X_SASL_USERNAME:
1063                 /* This option is read-only */
1064                 return -1;
1065
1066         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1067                 int sc;
1068 #if SASL_VERSION_MAJOR < 2
1069                 sasl_external_properties_t extprops;
1070 #else
1071                 sasl_ssf_t sasl_ssf;
1072 #endif
1073                 sasl_conn_t *ctx;
1074
1075                 if( ld->ld_defconn == NULL ) {
1076                         return -1;
1077                 }
1078
1079                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1080
1081                 if ( ctx == NULL ) {
1082                         return -1;
1083                 }
1084
1085 #if SASL_VERSION_MAJOR >= 2
1086                 sasl_ssf = * (ber_len_t *)arg;
1087                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf);
1088 #else
1089                 memset(&extprops, 0L, sizeof(extprops));
1090
1091                 extprops.ssf = * (ber_len_t *) arg;
1092
1093                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1094                         (void *) &extprops );
1095 #endif
1096
1097                 if ( sc != SASL_OK ) {
1098                         return -1;
1099                 }
1100                 } break;
1101
1102         case LDAP_OPT_X_SASL_SSF_MIN:
1103                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1104                 break;
1105         case LDAP_OPT_X_SASL_SSF_MAX:
1106                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1107                 break;
1108         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1109                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1110                 break;
1111         case LDAP_OPT_X_SASL_NOCANON:
1112                 if ( arg == LDAP_OPT_OFF ) {
1113                         LDAP_BOOL_CLR(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1114                 } else {
1115                         LDAP_BOOL_SET(&ld->ld_options, LDAP_BOOL_SASL_NOCANON );
1116                 }
1117                 break;
1118
1119         case LDAP_OPT_X_SASL_SECPROPS: {
1120                 int sc;
1121                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1122                         &ld->ld_options.ldo_sasl_secprops );
1123
1124                 return sc == LDAP_SUCCESS ? 0 : -1;
1125                 }
1126
1127 #ifdef SASL_GSS_CREDS
1128         case LDAP_OPT_X_SASL_GSS_CREDS: {
1129                 sasl_conn_t *ctx;
1130                 int sc;
1131
1132                 if ( ld->ld_defconn == NULL )
1133                         return -1;
1134
1135                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1136                 if ( ctx == NULL )
1137                         return -1;
1138
1139                 sc = sasl_setprop( ctx, SASL_GSS_CREDS, arg );
1140                 if ( sc != SASL_OK )
1141                         return -1;
1142                 }
1143                 break;
1144 #endif
1145
1146         default:
1147                 return -1;
1148         }
1149         return 0;
1150 }
1151
1152 #ifdef LDAP_R_COMPILE
1153 #define LDAP_DEBUG_R_SASL
1154 void *ldap_pvt_sasl_mutex_new(void)
1155 {
1156         ldap_pvt_thread_mutex_t *mutex;
1157
1158         mutex = (ldap_pvt_thread_mutex_t *) LDAP_CALLOC( 1,
1159                 sizeof(ldap_pvt_thread_mutex_t) );
1160
1161         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1162                 return mutex;
1163         }
1164         LDAP_FREE( mutex );
1165 #ifndef LDAP_DEBUG_R_SASL
1166         assert( 0 );
1167 #endif /* !LDAP_DEBUG_R_SASL */
1168         return NULL;
1169 }
1170
1171 int ldap_pvt_sasl_mutex_lock(void *mutex)
1172 {
1173 #ifdef LDAP_DEBUG_R_SASL
1174         if ( mutex == NULL ) {
1175                 return SASL_OK;
1176         }
1177 #else /* !LDAP_DEBUG_R_SASL */
1178         assert( mutex != NULL );
1179 #endif /* !LDAP_DEBUG_R_SASL */
1180         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1181                 ? SASL_FAIL : SASL_OK;
1182 }
1183
1184 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1185 {
1186 #ifdef LDAP_DEBUG_R_SASL
1187         if ( mutex == NULL ) {
1188                 return SASL_OK;
1189         }
1190 #else /* !LDAP_DEBUG_R_SASL */
1191         assert( mutex != NULL );
1192 #endif /* !LDAP_DEBUG_R_SASL */
1193         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1194                 ? SASL_FAIL : SASL_OK;
1195 }
1196
1197 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1198 {
1199 #ifdef LDAP_DEBUG_R_SASL
1200         if ( mutex == NULL ) {
1201                 return;
1202         }
1203 #else /* !LDAP_DEBUG_R_SASL */
1204         assert( mutex != NULL );
1205 #endif /* !LDAP_DEBUG_R_SASL */
1206         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1207         LDAP_FREE( mutex );
1208 }
1209 #endif
1210
1211 #else
1212 int ldap_int_sasl_init( void )
1213 { return LDAP_SUCCESS; }
1214
1215 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1216 { return LDAP_SUCCESS; }
1217
1218 int
1219 ldap_int_sasl_bind(
1220         LDAP                    *ld,
1221         const char              *dn,
1222         const char              *mechs,
1223         LDAPControl             **sctrls,
1224         LDAPControl             **cctrls,
1225         unsigned                flags,
1226         LDAP_SASL_INTERACT_PROC *interact,
1227         void                    *defaults,
1228         LDAPMessage             *result,
1229         const char              **rmech,
1230         int                             *msgid )
1231 { return LDAP_NOT_SUPPORTED; }
1232
1233 int
1234 ldap_int_sasl_external(
1235         LDAP *ld,
1236         LDAPConn *conn,
1237         const char * authid,
1238         ber_len_t ssf )
1239 { return LDAP_SUCCESS; }
1240
1241 #endif /* HAVE_CYRUS_SASL */