git.sur5r.net Git - openldap/blob - libraries/libldap/cyrus.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10
  11 #include <ac/socket.h>
  12 #include <ac/stdlib.h>
  13 #include <ac/string.h>
  14 #include <ac/time.h>
  15 #include <ac/errno.h>
  16 #include <ac/ctype.h>
  17
  18 #include "ldap-int.h"
  19
  20 #ifdef HAVE_CYRUS_SASL
  21
  22 #ifdef LDAP_R_COMPILE
  23 ldap_pvt_thread_mutex_t ldap_int_sasl_mutex;
  24 #endif
  25
  26 #include <sasl.h>
  27
  28 /*
  29 * Various Cyrus SASL related stuff.
  30 */
  31
  32 int ldap_int_sasl_init( void )
  33 {
  34         /* XXX not threadsafe */
  35         static int sasl_initialized = 0;
  36
  37         static sasl_callback_t client_callbacks[] = {
  38 #ifdef SASL_CB_GETREALM
  39                 { SASL_CB_GETREALM, NULL, NULL },
  40 #endif
  41                 { SASL_CB_USER, NULL, NULL },
  42                 { SASL_CB_AUTHNAME, NULL, NULL },
  43                 { SASL_CB_PASS, NULL, NULL },
  44                 { SASL_CB_ECHOPROMPT, NULL, NULL },
  45                 { SASL_CB_NOECHOPROMPT, NULL, NULL },
  46                 { SASL_CB_LIST_END, NULL, NULL }
  47         };
  48
  49         if ( sasl_initialized ) {
  50                 return 0;
  51         }
  52
  53 #ifndef CSRIMALLOC
  54         sasl_set_alloc(
  55                 ber_memalloc,
  56                 ber_memcalloc,
  57                 ber_memrealloc,
  58                 ber_memfree );
  59 #endif /* CSRIMALLOC */
  60
  61 #ifdef LDAP_R_COMPILE
  62         sasl_set_mutex(
  63                 ldap_pvt_sasl_mutex_new,
  64                 ldap_pvt_sasl_mutex_lock,
  65                 ldap_pvt_sasl_mutex_unlock,
  66                 ldap_pvt_sasl_mutex_dispose );
  67
  68         ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
  69 #endif
  70
  71         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
  72                 sasl_initialized = 1;
  73                 return 0;
  74         }
  75
  76         return -1;
  77 }
  78
  79 /*
  80  * SASL encryption support for LBER Sockbufs
  81  */
  82
  83 struct sb_sasl_data {
  84         sasl_conn_t             *sasl_context;
  85         unsigned                *sasl_maxbuf;
  86         Sockbuf_Buf             sec_buf_in;
  87         Sockbuf_Buf             buf_in;
  88         Sockbuf_Buf             buf_out;
  89 };
  90
  91 static int
  92 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
  93 {
  94         struct sb_sasl_data     *p;
  95
  96         assert( sbiod != NULL );
  97
  98         p = LBER_MALLOC( sizeof( *p ) );
  99         if ( p == NULL )
 100                 return -1;
 101         p->sasl_context = (sasl_conn_t *)arg;
 102         ber_pvt_sb_buf_init( &p->sec_buf_in );
 103         ber_pvt_sb_buf_init( &p->buf_in );
 104         ber_pvt_sb_buf_init( &p->buf_out );
 105         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 106                 LBER_FREE( p );
 107                 errno = ENOMEM;
 108                 return -1;
 109         }
 110         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
 111                 (void **) &p->sasl_maxbuf );
 112
 113         sbiod->sbiod_pvt = p;
 114
 115         return 0;
 116 }
 117
 118 static int
 119 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 120 {
 121         struct sb_sasl_data     *p;
 122
 123         assert( sbiod != NULL );
 124
 125         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 126         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 127         ber_pvt_sb_buf_destroy( &p->buf_in );
 128         ber_pvt_sb_buf_destroy( &p->buf_out );
 129         LBER_FREE( p );
 130         sbiod->sbiod_pvt = NULL;
 131         return 0;
 132 }
 133
 134 static ber_len_t
 135 sb_sasl_pkt_length( const unsigned char *buf, unsigned max, int debuglevel )
 136 {
 137         ber_len_t               size;
 138
 139         assert( buf != NULL );
 140
 141         size = buf[0] << 24
 142                 | buf[1] << 16
 143                 | buf[2] << 8
 144                 | buf[3];
 145
 146         if ( size > max ) {
 147                 /* somebody is trying to mess me up. */
 148                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 149                         "sb_sasl_pkt_length: received illegal packet length "
 150                         "of %lu bytes\n", (unsigned long)size );
 151                 size = 16; /* this should lead to an error. */
 152         }
 153
 154         return size + 4; /* include the size !!! */
 155 }
 156
 157 /* Drop a processed packet from the input buffer */
 158 static void
 159 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, unsigned max, int debuglevel )
 160 {
 161         ber_slen_t                      len;
 162
 163         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 164         if ( len > 0 )
 165                 AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
 166                         sec_buf_in->buf_end, len );
 167
 168         if ( len >= 4 ) {
 169                 sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
 170                         max, debuglevel);
 171         }
 172         else {
 173                 sec_buf_in->buf_end = 0;
 174         }
 175         sec_buf_in->buf_ptr = len;
 176 }
 177
 178 static ber_slen_t
 179 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 180 {
 181         struct sb_sasl_data     *p;
 182         ber_slen_t              ret, bufptr;
 183
 184         assert( sbiod != NULL );
 185         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 186
 187         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 188
 189         /* Are there anything left in the buffer? */
 190         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 191         bufptr = ret;
 192         len -= ret;
 193
 194         if ( len == 0 )
 195                 return bufptr;
 196
 197         ber_pvt_sb_buf_destroy( &p->buf_in );
 198
 199         /* Read the length of the packet */
 200         while ( p->sec_buf_in.buf_ptr < 4 ) {
 201                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 202                         4 - p->sec_buf_in.buf_ptr );
 203 #ifdef EINTR
 204                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 205                         continue;
 206 #endif
 207                 if ( ret <= 0 )
 208                         return ret;
 209
 210                 p->sec_buf_in.buf_ptr += ret;
 211         }
 212
 213         /* The new packet always starts at p->sec_buf_in.buf_base */
 214         ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
 215                 *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 216
 217         /* Grow the packet buffer if neccessary */
 218         if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
 219                         ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) {
 220                 errno = ENOMEM;
 221                 return -1;
 222         }
 223         p->sec_buf_in.buf_end = ret;
 224
 225         /* Did we read the whole encrypted packet? */
 226         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 227                 /* No, we have got only a part of it */
 228                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 229
 230                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 231                         p->sec_buf_in.buf_ptr, ret );
 232 #ifdef EINTR
 233                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 234                         continue;
 235 #endif
 236                 if ( ret <= 0 )
 237                         return ret;
 238
 239                 p->sec_buf_in.buf_ptr += ret;
 240         }
 241
 242         /* Decode the packet */
 243         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 244                 p->sec_buf_in.buf_end, &p->buf_in.buf_base,
 245                 (unsigned *)&p->buf_in.buf_end );
 246
 247         /* Drop the packet from the input buffer */
 248         sb_sasl_drop_packet( &p->sec_buf_in,
 249                         *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 250
 251         if ( ret != SASL_OK ) {
 252                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 253                         "sb_sasl_read: failed to decode packet: %s\n",
 254                         sasl_errstring( ret, NULL, NULL ) );
 255                 errno = EIO;
 256                 return -1;
 257         }
 258
 259         p->buf_in.buf_size = p->buf_in.buf_end;
 260
 261         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 262
 263         return bufptr;
 264 }
 265
 266 static ber_slen_t
 267 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 268 {
 269         struct sb_sasl_data     *p;
 270         int                     ret;
 271
 272         assert( sbiod != NULL );
 273         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 274
 275         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 276
 277         /* Are there anything left in the buffer? */
 278         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 279                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 280                 if ( ret <= 0 )
 281                         return ret;
 282         }
 283
 284         /* now encode the next packet. */
 285         ber_pvt_sb_buf_destroy( &p->buf_out );
 286
 287         if ( len > *p->sasl_maxbuf - 100 )
 288                 len = *p->sasl_maxbuf - 100;    /* For safety margin */
 289         ret = sasl_encode( p->sasl_context, buf, len, &p->buf_out.buf_base,
 290                 (unsigned *)&p->buf_out.buf_size );
 291         if ( ret != SASL_OK ) {
 292                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 293                         "sb_sasl_write: failed to encode packet: %s\n",
 294                         sasl_errstring( ret, NULL, NULL ) );
 295                 return -1;
 296         }
 297         p->buf_out.buf_end = p->buf_out.buf_size;
 298
 299         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 300         if ( ret <= 0 )
 301                 return ret;
 302         return len;
 303 }
 304
 305 static int
 306 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 307 {
 308         struct sb_sasl_data     *p;
 309
 310         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 311
 312         if ( opt == LBER_SB_OPT_DATA_READY ) {
 313                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 314                         return 1;
 315         }
 316
 317         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 318 }
 319
 320 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 321         sb_sasl_setup,          /* sbi_setup */
 322         sb_sasl_remove,         /* sbi_remove */
 323         sb_sasl_ctrl,           /* sbi_ctrl */
 324         sb_sasl_read,           /* sbi_read */
 325         sb_sasl_write,          /* sbi_write */
 326         NULL                    /* sbi_close */
 327 };
 328
 329 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 330 {
 331         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 332                 0, 0, 0 );
 333
 334         /* don't install the stuff unless security has been negotiated */
 335
 336         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 337                         &ldap_pvt_sockbuf_io_sasl ) )
 338         {
 339 #ifdef LDAP_DEBUG
 340                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 341                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 342 #endif
 343                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 344                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 345         }
 346
 347         return LDAP_SUCCESS;
 348 }
 349
 350 static int
 351 sasl_err2ldap( int saslerr )
 352 {
 353         int rc;
 354
 355         switch (saslerr) {
 356                 case SASL_CONTINUE:
 357                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 358                         break;
 359                 case SASL_INTERACT:
 360                         rc = LDAP_LOCAL_ERROR;
 361                         break;
 362                 case SASL_OK:
 363                         rc = LDAP_SUCCESS;
 364                         break;
 365                 case SASL_FAIL:
 366                         rc = LDAP_LOCAL_ERROR;
 367                         break;
 368                 case SASL_NOMEM:
 369                         rc = LDAP_NO_MEMORY;
 370                         break;
 371                 case SASL_NOMECH:
 372                         rc = LDAP_AUTH_UNKNOWN;
 373                         break;
 374                 case SASL_BADAUTH:
 375                         rc = LDAP_AUTH_UNKNOWN;
 376                         break;
 377                 case SASL_NOAUTHZ:
 378                         rc = LDAP_PARAM_ERROR;
 379                         break;
 380                 case SASL_TOOWEAK:
 381                 case SASL_ENCRYPT:
 382                         rc = LDAP_AUTH_UNKNOWN;
 383                         break;
 384                 default:
 385                         rc = LDAP_LOCAL_ERROR;
 386                         break;
 387         }
 388
 389         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 390         return rc;
 391 }
 392
 393 int
 394 ldap_int_sasl_open(
 395         LDAP *ld,
 396         LDAPConn *lc,
 397         const char * host,
 398         ber_len_t ssf )
 399 {
 400         int rc;
 401         sasl_conn_t *ctx;
 402
 403         assert( lc->lconn_sasl_ctx == NULL );
 404
 405         if ( host == NULL ) {
 406                 ld->ld_errno = LDAP_LOCAL_ERROR;
 407                 return ld->ld_errno;
 408         }
 409
 410         rc = sasl_client_new( "ldap", host, NULL,
 411                 SASL_SECURITY_LAYER, &ctx );
 412
 413         if ( rc != SASL_OK ) {
 414                 ld->ld_errno = sasl_err2ldap( rc );
 415                 return ld->ld_errno;
 416         }
 417
 418         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 419                 host, 0, 0 );
 420
 421         lc->lconn_sasl_ctx = ctx;
 422
 423         if( ssf ) {
 424                 sasl_external_properties_t extprops;
 425                 memset(&extprops, 0L, sizeof(extprops));
 426                 extprops.ssf = ssf;
 427
 428                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 429                         (void *) &extprops );
 430
 431                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 432                         (long) ssf, 0, 0 );
 433         }
 434
 435         return LDAP_SUCCESS;
 436 }
 437
 438 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 439 {
 440         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 441
 442         if( ctx != NULL ) {
 443                 sasl_dispose( &ctx );
 444                 lc->lconn_sasl_ctx = NULL;
 445         }
 446
 447         return LDAP_SUCCESS;
 448 }
 449
 450 int
 451 ldap_int_sasl_bind(
 452         LDAP                    *ld,
 453         const char              *dn,
 454         const char              *mechs,
 455         LDAPControl             **sctrls,
 456         LDAPControl             **cctrls,
 457         unsigned                flags,
 458         LDAP_SASL_INTERACT_PROC *interact,
 459         void * defaults )
 460 {
 461         char *data;
 462         const char *mech = NULL;
 463         const char *pmech = NULL;
 464         int                     saslrc, rc;
 465         sasl_ssf_t              *ssf = NULL;
 466         sasl_conn_t     *ctx;
 467         sasl_interact_t *prompts = NULL;
 468         unsigned credlen;
 469         struct berval ccred;
 470         ber_socket_t            sd;
 471
 472         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 473                 mechs ? mechs : "<null>", 0, 0 );
 474
 475         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 476         if (ld->ld_version < LDAP_VERSION3) {
 477                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 478                 return ld->ld_errno;
 479         }
 480
 481         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 482
 483         if ( sd == AC_SOCKET_INVALID ) {
 484                 /* not connected yet */
 485                 int rc;
 486
 487                 rc = ldap_open_defconn( ld );
 488                 if( rc < 0 ) return ld->ld_errno;
 489
 490                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 491
 492                 if( sd == AC_SOCKET_INVALID ) {
 493                         ld->ld_errno = LDAP_LOCAL_ERROR;
 494                         return ld->ld_errno;
 495                 }
 496         }
 497
 498         ctx = ld->ld_defconn->lconn_sasl_ctx;
 499
 500         if( ctx == NULL ) {
 501                 ld->ld_errno = LDAP_LOCAL_ERROR;
 502                 return ld->ld_errno;
 503         }
 504
 505         /* (re)set security properties */
 506         sasl_setprop( ctx, SASL_SEC_PROPS,
 507                 &ld->ld_options.ldo_sasl_secprops );
 508
 509         ccred.bv_val = NULL;
 510         ccred.bv_len = 0;
 511
 512         do {
 513                 saslrc = sasl_client_start( ctx,
 514                         mechs,
 515                         NULL,
 516                         &prompts,
 517                         &ccred.bv_val,
 518                         &credlen,
 519                         &mech );
 520
 521                 if( pmech == NULL && mech != NULL ) {
 522                         pmech = 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                         if( res != LDAP_SUCCESS ) {
 536                                 break;
 537                         }
 538                 }
 539         } while ( saslrc == SASL_INTERACT );
 540
 541         ccred.bv_len = credlen;
 542
 543         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 544                 ld->ld_errno = sasl_err2ldap( saslrc );
 545                 return ld->ld_errno;
 546         }
 547
 548         do {
 549                 struct berval *scred;
 550                 unsigned credlen;
 551
 552                 scred = NULL;
 553
 554                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 555
 556                 if ( ccred.bv_val != NULL ) {
 557                         LDAP_FREE( ccred.bv_val );
 558                         ccred.bv_val = NULL;
 559                 }
 560
 561                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 562                         if( scred && scred->bv_len ) {
 563                                 /* and server provided us with data? */
 564                                 Debug( LDAP_DEBUG_TRACE,
 565                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 566                                         rc, saslrc, scred->bv_len );
 567                                 ber_bvfree( scred );
 568                         }
 569                         return ld->ld_errno;
 570                 }
 571
 572                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 573                         /* we're done, no need to step */
 574                         if( scred && scred->bv_len ) {
 575                                 /* but server provided us with data! */
 576                                 Debug( LDAP_DEBUG_TRACE,
 577                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 578                                         rc, saslrc, scred->bv_len );
 579                                 ber_bvfree( scred );
 580                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 581                         }
 582                         break;
 583                 }
 584
 585                 do {
 586                         saslrc = sasl_client_step( ctx,
 587                                 (scred == NULL) ? NULL : scred->bv_val,
 588                                 (scred == NULL) ? 0 : scred->bv_len,
 589                                 &prompts,
 590                                 &ccred.bv_val,
 591                                 &credlen );
 592
 593                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 594                                 saslrc, 0, 0 );
 595
 596                         if( saslrc == SASL_INTERACT ) {
 597                                 int res;
 598                                 if( !interact ) break;
 599                                 res = (interact)( ld, flags, defaults, prompts );
 600                                 if( res != LDAP_SUCCESS ) {
 601                                         break;
 602                                 }
 603                         }
 604                 } while ( saslrc == SASL_INTERACT );
 605
 606                 ccred.bv_len = credlen;
 607                 ber_bvfree( scred );
 608
 609                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 610                         ld->ld_errno = sasl_err2ldap( saslrc );
 611                         return ld->ld_errno;
 612                 }
 613         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 614
 615         if ( rc != LDAP_SUCCESS ) {
 616                 return rc;
 617         }
 618
 619         if ( saslrc != SASL_OK ) {
 620                 return ld->ld_errno = sasl_err2ldap( saslrc );
 621         }
 622
 623         if( flags != LDAP_SASL_QUIET ) {
 624                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (void **) &data );
 625                 if( saslrc == SASL_OK && data && *data ) {
 626                         fprintf( stderr, "SASL username: %s\n", data );
 627                 }
 628
 629                 saslrc = sasl_getprop( ctx, SASL_REALM, (void **) &data );
 630                 if( saslrc == SASL_OK && data && *data ) {
 631                         fprintf( stderr, "SASL realm: %s\n", data );
 632                 }
 633         }
 634
 635         saslrc = sasl_getprop( ctx, SASL_SSF, (void **) &ssf );
 636         if( saslrc == SASL_OK ) {
 637                 if( flags != LDAP_SASL_QUIET ) {
 638                         fprintf( stderr, "SASL SSF: %lu\n",
 639                                 (unsigned long) *ssf );
 640                 }
 641
 642                 if( ssf && *ssf ) {
 643                         if( flags != LDAP_SASL_QUIET ) {
 644                                 fprintf( stderr, "SASL installing layers\n" );
 645                         }
 646                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 647                 }
 648         }
 649
 650         return rc;
 651 }
 652
 653 int
 654 ldap_int_sasl_external(
 655         LDAP *ld,
 656         LDAPConn *conn,
 657         const char * authid,
 658         ber_len_t ssf )
 659 {
 660         int sc;
 661         sasl_conn_t *ctx;
 662         sasl_external_properties_t extprops;
 663
 664         ctx = conn->lconn_sasl_ctx;
 665
 666         if ( ctx == NULL ) {
 667                 return LDAP_LOCAL_ERROR;
 668         }
 669
 670         memset( &extprops, '\0', sizeof(extprops) );
 671         extprops.ssf = ssf;
 672         extprops.auth_id = (char *) authid;
 673
 674         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 675                 (void *) &extprops );
 676
 677         if ( sc != SASL_OK ) {
 678                 return LDAP_LOCAL_ERROR;
 679         }
 680
 681         return LDAP_SUCCESS;
 682 }
 683
 684
 685 int ldap_pvt_sasl_secprops(
 686         const char *in,
 687         sasl_security_properties_t *secprops )
 688 {
 689         int i;
 690         char **props = ldap_str2charray( in, "," );
 691         unsigned sflags = 0;
 692         int got_sflags = 0;
 693         sasl_ssf_t max_ssf = 0;
 694         int got_max_ssf = 0;
 695         sasl_ssf_t min_ssf = 0;
 696         int got_min_ssf = 0;
 697         unsigned maxbufsize = 0;
 698         int got_maxbufsize = 0;
 699
 700         if( props == NULL || secprops == NULL ) {
 701                 return LDAP_PARAM_ERROR;
 702         }
 703
 704         for( i=0; props[i]; i++ ) {
 705                 if( !strcasecmp(props[i], "none") ) {
 706                         got_sflags++;
 707
 708                 } else if( !strcasecmp(props[i], "noplain") ) {
 709                         got_sflags++;
 710                         sflags |= SASL_SEC_NOPLAINTEXT;
 711
 712                 } else if( !strcasecmp(props[i], "noactive") ) {
 713                         got_sflags++;
 714                         sflags |= SASL_SEC_NOACTIVE;
 715
 716                 } else if( !strcasecmp(props[i], "nodict") ) {
 717                         got_sflags++;
 718                         sflags |= SASL_SEC_NODICTIONARY;
 719
 720                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 721                         got_sflags++;
 722                         sflags |= SASL_SEC_FORWARD_SECRECY;
 723
 724                 } else if( !strcasecmp(props[i], "noanonymous")) {
 725                         got_sflags++;
 726                         sflags |= SASL_SEC_NOANONYMOUS;
 727
 728                 } else if( !strcasecmp(props[i], "passcred") ) {
 729                         got_sflags++;
 730                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 731
 732                 } else if( !strncasecmp(props[i],
 733                         "minssf=", sizeof("minssf")) )
 734                 {
 735                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 736                                 got_min_ssf++;
 737                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 738                         } else {
 739                                 return LDAP_NOT_SUPPORTED;
 740                         }
 741
 742                 } else if( !strncasecmp(props[i],
 743                         "maxssf=", sizeof("maxssf")) )
 744                 {
 745                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 746                                 got_max_ssf++;
 747                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 748                         } else {
 749                                 return LDAP_NOT_SUPPORTED;
 750                         }
 751
 752                 } else if( !strncasecmp(props[i],
 753                         "maxbufsize=", sizeof("maxbufsize")) )
 754                 {
 755                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 756                                 got_maxbufsize++;
 757                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 758                         } else {
 759                                 return LDAP_NOT_SUPPORTED;
 760                         }
 761
 762                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 763                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 764                         {
 765                                 /* bad maxbufsize */
 766                                 return LDAP_PARAM_ERROR;
 767                         }
 768
 769                 } else {
 770                         return LDAP_NOT_SUPPORTED;
 771                 }
 772         }
 773
 774         if(got_sflags) {
 775                 secprops->security_flags = sflags;
 776         }
 777         if(got_min_ssf) {
 778                 secprops->min_ssf = min_ssf;
 779         }
 780         if(got_max_ssf) {
 781                 secprops->max_ssf = max_ssf;
 782         }
 783         if(got_maxbufsize) {
 784                 secprops->maxbufsize = maxbufsize;
 785         }
 786
 787         ldap_charray_free( props );
 788         return LDAP_SUCCESS;
 789 }
 790
 791 int
 792 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 793 {
 794         int rc;
 795
 796         switch( option ) {
 797         case LDAP_OPT_X_SASL_SECPROPS:
 798                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 799                 if( rc == LDAP_SUCCESS ) return 0;
 800         }
 801
 802         return -1;
 803 }
 804
 805 int
 806 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 807 {
 808         if ( ld == NULL )
 809                 return -1;
 810
 811         switch ( option ) {
 812                 case LDAP_OPT_X_SASL_MECH: {
 813                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 814                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 815                 } break;
 816                 case LDAP_OPT_X_SASL_REALM: {
 817                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 818                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 819                 } break;
 820                 case LDAP_OPT_X_SASL_AUTHCID: {
 821                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 822                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 823                 } break;
 824                 case LDAP_OPT_X_SASL_AUTHZID: {
 825                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 826                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 827                 } break;
 828
 829                 case LDAP_OPT_X_SASL_SSF: {
 830                         int sc;
 831                         sasl_ssf_t      *ssf;
 832                         sasl_conn_t *ctx;
 833
 834                         if( ld->ld_defconn == NULL ) {
 835                                 return -1;
 836                         }
 837
 838                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 839
 840                         if ( ctx == NULL ) {
 841                                 return -1;
 842                         }
 843
 844                         sc = sasl_getprop( ctx, SASL_SSF,
 845                                 (void **) &ssf );
 846
 847                         if ( sc != SASL_OK ) {
 848                                 return -1;
 849                         }
 850
 851                         *(ber_len_t *)arg = *ssf;
 852                 } break;
 853
 854                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 855                         /* this option is write only */
 856                         return -1;
 857
 858                 case LDAP_OPT_X_SASL_SSF_MIN:
 859                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 860                         break;
 861                 case LDAP_OPT_X_SASL_SSF_MAX:
 862                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 863                         break;
 864                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 865                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 866                         break;
 867
 868                 case LDAP_OPT_X_SASL_SECPROPS:
 869                         /* this option is write only */
 870                         return -1;
 871
 872                 default:
 873                         return -1;
 874         }
 875         return 0;
 876 }
 877
 878 int
 879 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 880 {
 881         if ( ld == NULL )
 882                 return -1;
 883
 884         switch ( option ) {
 885         case LDAP_OPT_X_SASL_SSF:
 886                 /* This option is read-only */
 887                 return -1;
 888
 889         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
 890                 int sc;
 891                 sasl_external_properties_t extprops;
 892                 sasl_conn_t *ctx;
 893
 894                 if( ld->ld_defconn == NULL ) {
 895                         return -1;
 896                 }
 897
 898                 ctx = ld->ld_defconn->lconn_sasl_ctx;
 899
 900                 if ( ctx == NULL ) {
 901                         return -1;
 902                 }
 903
 904                 memset(&extprops, 0L, sizeof(extprops));
 905
 906                 extprops.ssf = * (ber_len_t *) arg;
 907
 908                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 909                         (void *) &extprops );
 910
 911                 if ( sc != SASL_OK ) {
 912                         return -1;
 913                 }
 914                 } break;
 915
 916         case LDAP_OPT_X_SASL_SSF_MIN:
 917                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
 918                 break;
 919         case LDAP_OPT_X_SASL_SSF_MAX:
 920                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
 921                 break;
 922         case LDAP_OPT_X_SASL_MAXBUFSIZE:
 923                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
 924                 break;
 925
 926         case LDAP_OPT_X_SASL_SECPROPS: {
 927                 int sc;
 928                 sc = ldap_pvt_sasl_secprops( (char *) arg,
 929                         &ld->ld_options.ldo_sasl_secprops );
 930
 931                 return sc == LDAP_SUCCESS ? 0 : -1;
 932                 }
 933
 934         default:
 935                 return -1;
 936         }
 937         return 0;
 938 }
 939
 940 #ifdef LDAP_R_COMPILE
 941 void *ldap_pvt_sasl_mutex_new(void)
 942 {
 943         ldap_pvt_thread_mutex_t *mutex;
 944
 945         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
 946                 sizeof(ldap_pvt_thread_mutex_t) );
 947
 948         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
 949                 return mutex;
 950         }
 951         return NULL;
 952 }
 953
 954 int ldap_pvt_sasl_mutex_lock(void *mutex)
 955 {
 956         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
 957                 ? SASL_FAIL : SASL_OK;
 958 }
 959
 960 int ldap_pvt_sasl_mutex_unlock(void *mutex)
 961 {
 962         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
 963                 ? SASL_FAIL : SASL_OK;
 964 }
 965
 966 void ldap_pvt_sasl_mutex_dispose(void *mutex)
 967 {
 968         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
 969         LDAP_FREE( mutex );
 970 }
 971 #endif
 972
 973 #else
 974 int ldap_int_sasl_init( void )
 975 { return LDAP_SUCCESS; }
 976
 977 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 978 { return LDAP_SUCCESS; }
 979
 980 int
 981 ldap_int_sasl_bind(
 982         LDAP                    *ld,
 983         const char              *dn,
 984         const char              *mechs,
 985         LDAPControl             **sctrls,
 986         LDAPControl             **cctrls,
 987         unsigned                flags,
 988         LDAP_SASL_INTERACT_PROC *interact,
 989         void * defaults )
 990 { return LDAP_NOT_SUPPORTED; }
 991
 992 int
 993 ldap_int_sasl_external(
 994         LDAP *ld,
 995         LDAPConn *conn,
 996         const char * authid,
 997         ber_len_t ssf )
 998 { return LDAP_SUCCESS; }
 999
1000 #endif /* HAVE_CYRUS_SASL */