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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2000 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11
  12 #include <ac/socket.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 #ifdef LDAP_R_COMPILE
  20 #include "ldap_pvt_thread.h"
  21 #endif
  22
  23 #ifdef HAVE_CYRUS_SASL
  24 #include <sasl.h>
  25
  26 /*
  27 * Various Cyrus SASL related stuff.
  28 */
  29
  30 #define SASL_MAX_BUFF_SIZE      65536
  31 #define SASL_MIN_BUFF_SIZE      4096
  32
  33 int ldap_int_sasl_init( void )
  34 {
  35         /* XXX not threadsafe */
  36         static int sasl_initialized = 0;
  37
  38         static sasl_callback_t client_callbacks[] = {
  39 #ifdef SASL_CB_GETREALM
  40                 { SASL_CB_GETREALM, NULL, NULL },
  41 #endif
  42                 { SASL_CB_USER, NULL, NULL },
  43                 { SASL_CB_AUTHNAME, NULL, NULL },
  44                 { SASL_CB_PASS, NULL, NULL },
  45                 { SASL_CB_ECHOPROMPT, NULL, NULL },
  46                 { SASL_CB_NOECHOPROMPT, NULL, NULL },
  47                 { SASL_CB_LIST_END, NULL, NULL }
  48         };
  49
  50         if ( sasl_initialized ) {
  51                 return 0;
  52         }
  53
  54 #ifndef CSRIMALLOC
  55         sasl_set_alloc(
  56                 ber_memalloc,
  57                 ber_memcalloc,
  58                 ber_memrealloc,
  59                 ber_memfree );
  60 #endif /* CSRIMALLOC */
  61
  62 #ifdef LDAP_R_COMPILE
  63         sasl_set_mutex(
  64                 ldap_pvt_sasl_mutex_new,
  65                 ldap_pvt_sasl_mutex_lock,
  66                 ldap_pvt_sasl_mutex_unlock,
  67                 ldap_pvt_sasl_mutex_dispose );
  68 #endif
  69
  70         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
  71                 sasl_initialized = 1;
  72                 return 0;
  73         }
  74
  75         return -1;
  76 }
  77
  78 /*
  79  * SASL encryption support for LBER Sockbufs
  80  */
  81
  82 struct sb_sasl_data {
  83         sasl_conn_t             *sasl_context;
  84         Sockbuf_Buf             sec_buf_in;
  85         Sockbuf_Buf             buf_in;
  86         Sockbuf_Buf             buf_out;
  87 };
  88
  89 static int
  90 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
  91 {
  92         struct sb_sasl_data     *p;
  93
  94         assert( sbiod != NULL );
  95
  96         p = LBER_MALLOC( sizeof( *p ) );
  97         if ( p == NULL )
  98                 return -1;
  99         p->sasl_context = (sasl_conn_t *)arg;
 100         ber_pvt_sb_buf_init( &p->sec_buf_in );
 101         ber_pvt_sb_buf_init( &p->buf_in );
 102         ber_pvt_sb_buf_init( &p->buf_out );
 103         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 104                 errno = ENOMEM;
 105                 return -1;
 106         }
 107
 108         sbiod->sbiod_pvt = p;
 109
 110         return 0;
 111 }
 112
 113 static int
 114 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 115 {
 116         struct sb_sasl_data     *p;
 117
 118         assert( sbiod != NULL );
 119
 120         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 121         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 122         ber_pvt_sb_buf_destroy( &p->buf_in );
 123         ber_pvt_sb_buf_destroy( &p->buf_out );
 124         LBER_FREE( p );
 125         sbiod->sbiod_pvt = NULL;
 126         return 0;
 127 }
 128
 129 static ber_len_t
 130 sb_sasl_pkt_length( const char *buf, int debuglevel )
 131 {
 132         ber_len_t               size;
 133         long                    tmp;
 134
 135         assert( buf != NULL );
 136
 137         tmp = *((long *)buf);
 138         size = ntohl( tmp );
 139
 140         if ( size > SASL_MAX_BUFF_SIZE ) {
 141                 /* somebody is trying to mess me up. */
 142                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 143                         "sb_sasl_pkt_length: received illegal packet length "
 144                         "of %lu bytes\n", (unsigned long)size );
 145                 size = 16; /* this should lead to an error. */
 146 }
 147
 148         return size + 4; /* include the size !!! */
 149 }
 150
 151 /* Drop a processed packet from the input buffer */
 152 static void
 153 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel )
 154 {
 155         ber_slen_t                      len;
 156
 157         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 158         if ( len > 0 )
 159                 memmove( sec_buf_in->buf_base, sec_buf_in->buf_base +
 160                         sec_buf_in->buf_end, len );
 161
 162         if ( len >= 4 ) {
 163                 sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
 164                         debuglevel);
 165         }
 166         else {
 167                 sec_buf_in->buf_end = 0;
 168         }
 169         sec_buf_in->buf_ptr = len;
 170 }
 171
 172 static ber_slen_t
 173 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 174 {
 175         struct sb_sasl_data     *p;
 176         ber_slen_t              ret, bufptr;
 177
 178         assert( sbiod != NULL );
 179         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 180
 181         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 182
 183         /* Are there anything left in the buffer? */
 184         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 185         bufptr = ret;
 186         len -= ret;
 187
 188         if ( len == 0 )
 189                 return bufptr;
 190
 191         ber_pvt_sb_buf_destroy( &p->buf_in );
 192
 193         /* Read the length of the packet */
 194         while ( p->sec_buf_in.buf_ptr < 4 ) {
 195                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 196                         4 - p->sec_buf_in.buf_ptr );
 197 #ifdef EINTR
 198                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 199                         continue;
 200 #endif
 201                 if ( ret <= 0 )
 202                         return ret;
 203
 204                 p->sec_buf_in.buf_ptr += ret;
 205         }
 206
 207         /* The new packet always starts at p->sec_buf_in.buf_base */
 208         ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
 209                 sbiod->sbiod_sb->sb_debug );
 210
 211         /* Grow the packet buffer if neccessary */
 212         if ( ( p->sec_buf_in.buf_size < ret ) &&
 213                         ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 ) {
 214                 errno = ENOMEM;
 215                 return -1;
 216         }
 217         p->sec_buf_in.buf_end = ret;
 218
 219         /* Did we read the whole encrypted packet? */
 220         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 221                 /* No, we have got only a part of it */
 222                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 223
 224                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 225                         p->sec_buf_in.buf_ptr, ret );
 226 #ifdef EINTR
 227                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 228                         continue;
 229 #endif
 230                 if ( ret <= 0 )
 231                         return ret;
 232
 233                 p->sec_buf_in.buf_ptr += ret;
 234         }
 235
 236         /* Decode the packet */
 237         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 238                 p->sec_buf_in.buf_end, &p->buf_in.buf_base,
 239                 (unsigned *)&p->buf_in.buf_end );
 240         if ( ret != SASL_OK ) {
 241                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 242                         "sb_sasl_read: failed to decode packet: %s\n",
 243                         sasl_errstring( ret, NULL, NULL ) );
 244                 sb_sasl_drop_packet( &p->sec_buf_in,
 245                         sbiod->sbiod_sb->sb_debug );
 246                 errno = EIO;
 247                 return -1;
 248         }
 249
 250         /* Drop the packet from the input buffer */
 251         sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug );
 252
 253         p->buf_in.buf_size = p->buf_in.buf_end;
 254
 255         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 256
 257         return bufptr;
 258 }
 259
 260 static ber_slen_t
 261 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 262 {
 263         struct sb_sasl_data     *p;
 264         int                     ret;
 265
 266         assert( sbiod != NULL );
 267         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 268
 269         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 270
 271         /* Are there anything left in the buffer? */
 272         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 273                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 274                 if ( ret <= 0 )
 275                         return ret;
 276         }
 277
 278         /* now encode the next packet. */
 279         ber_pvt_sb_buf_destroy( &p->buf_out );
 280         ret = sasl_encode( p->sasl_context, buf, len, &p->buf_out.buf_base,
 281                 (unsigned *)&p->buf_out.buf_size );
 282         if ( ret != SASL_OK ) {
 283                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 284                         "sb_sasl_write: failed to encode packet: %s\n",
 285                         sasl_errstring( ret, NULL, NULL ) );
 286                 return -1;
 287         }
 288         p->buf_out.buf_end = p->buf_out.buf_size;
 289
 290         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 291         if ( ret <= 0 )
 292                 return ret;
 293         return len;
 294 }
 295
 296 static int
 297 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 298 {
 299         struct sb_sasl_data     *p;
 300
 301         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 302
 303         if ( opt == LBER_SB_OPT_DATA_READY ) {
 304                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 305                         return 1;
 306         }
 307
 308         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 309 }
 310
 311 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 312         sb_sasl_setup,          /* sbi_setup */
 313         sb_sasl_remove,         /* sbi_remove */
 314         sb_sasl_ctrl,           /* sbi_ctrl */
 315         sb_sasl_read,           /* sbi_read */
 316         sb_sasl_write,          /* sbi_write */
 317         NULL                    /* sbi_close */
 318 };
 319
 320 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 321 {
 322         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 323                 0, 0, 0 );
 324
 325         /* don't install the stuff unless security has been negotiated */
 326
 327         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 328                         &ldap_pvt_sockbuf_io_sasl ) )
 329                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 330                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 331
 332         return LDAP_SUCCESS;
 333 }
 334
 335 static int
 336 sasl_err2ldap( int saslerr )
 337 {
 338         int rc;
 339
 340         switch (saslerr) {
 341                 case SASL_CONTINUE:
 342                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 343                         break;
 344                 case SASL_INTERACT:
 345                         rc = LDAP_LOCAL_ERROR;
 346                         break;
 347                 case SASL_OK:
 348                         rc = LDAP_SUCCESS;
 349                         break;
 350                 case SASL_FAIL:
 351                         rc = LDAP_LOCAL_ERROR;
 352                         break;
 353                 case SASL_NOMEM:
 354                         rc = LDAP_NO_MEMORY;
 355                         break;
 356                 case SASL_NOMECH:
 357                         rc = LDAP_AUTH_UNKNOWN;
 358                         break;
 359                 case SASL_BADAUTH:
 360                         rc = LDAP_AUTH_UNKNOWN;
 361                         break;
 362                 case SASL_NOAUTHZ:
 363                         rc = LDAP_PARAM_ERROR;
 364                         break;
 365                 case SASL_TOOWEAK:
 366                 case SASL_ENCRYPT:
 367                         rc = LDAP_AUTH_UNKNOWN;
 368                         break;
 369                 default:
 370                         rc = LDAP_LOCAL_ERROR;
 371                         break;
 372         }
 373
 374         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 375         return rc;
 376 }
 377
 378 int
 379 ldap_int_sasl_open(
 380         LDAP *ld,
 381         LDAPConn *lc,
 382         const char * host,
 383         ber_len_t ssf )
 384 {
 385         int rc;
 386         sasl_conn_t *ctx;
 387
 388         sasl_callback_t *session_callbacks =
 389                 ber_memcalloc( 2, sizeof( sasl_callback_t ) );
 390
 391         if( session_callbacks == NULL ) return LDAP_NO_MEMORY;
 392
 393         session_callbacks[0].id = SASL_CB_USER;
 394         session_callbacks[0].proc = NULL;
 395         session_callbacks[0].context = ld;
 396
 397         session_callbacks[1].id = SASL_CB_LIST_END;
 398         session_callbacks[1].proc = NULL;
 399         session_callbacks[1].context = NULL;
 400
 401         assert( lc->lconn_sasl_ctx == NULL );
 402
 403         if ( host == NULL ) {
 404                 ld->ld_errno = LDAP_UNAVAILABLE;
 405                 return ld->ld_errno;
 406         }
 407
 408         rc = sasl_client_new( "ldap", host, session_callbacks,
 409                 SASL_SECURITY_LAYER, &ctx );
 410
 411         if ( rc != SASL_OK ) {
 412                 ld->ld_errno = sasl_err2ldap( rc );
 413                 return ld->ld_errno;
 414         }
 415
 416         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: %s\n",
 417                 host, 0, 0 );
 418
 419         lc->lconn_sasl_ctx = ctx;
 420
 421         if( ssf ) {
 422                 sasl_external_properties_t extprops;
 423                 memset(&extprops, 0L, sizeof(extprops));
 424                 extprops.ssf = ssf;
 425
 426                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 427                         (void *) &extprops );
 428
 429                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 430                         (long) ssf, 0, 0 );
 431         }
 432
 433         return LDAP_SUCCESS;
 434 }
 435
 436 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 437 {
 438         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 439         assert( ctx != NULL );
 440
 441         if( ctx ) {
 442                 sasl_dispose( &ctx );
 443                 lc->lconn_sasl_ctx = NULL;
 444         }
 445
 446         return LDAP_SUCCESS;
 447 }
 448
 449 int
 450 ldap_int_sasl_bind(
 451         LDAP                    *ld,
 452         const char              *dn,
 453         const char              *mechs,
 454         LDAPControl             **sctrls,
 455         LDAPControl             **cctrls,
 456         unsigned                flags,
 457         LDAP_SASL_INTERACT_PROC *interact,
 458         void * defaults )
 459 {
 460         char *data;
 461         const char *mech = NULL;
 462         const char *pmech = NULL;
 463         int                     saslrc, rc;
 464         sasl_ssf_t              *ssf = NULL;
 465         sasl_conn_t     *ctx;
 466         sasl_interact_t *prompts = NULL;
 467         unsigned credlen;
 468         struct berval ccred;
 469         ber_socket_t            sd;
 470
 471         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 472                 mechs ? mechs : "<null>", 0, 0 );
 473
 474         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 475         if (ld->ld_version < LDAP_VERSION3) {
 476                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 477                 return ld->ld_errno;
 478         }
 479
 480         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 481
 482         if ( sd == AC_SOCKET_INVALID ) {
 483                 /* not connected yet */
 484                 int rc = ldap_open_defconn( ld );
 485
 486                 if( rc < 0 ) return ld->ld_errno;
 487                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 488
 489                 if( sd == AC_SOCKET_INVALID ) {
 490                         ld->ld_errno = LDAP_UNAVAILABLE;
 491                         return ld->ld_errno;
 492                 }
 493         }
 494
 495         ctx = ld->ld_defconn->lconn_sasl_ctx;
 496
 497         if( ctx == NULL ) {
 498                 ld->ld_errno = LDAP_UNAVAILABLE;
 499                 return ld->ld_errno;
 500         }
 501
 502         /* (re)set security properties */
 503         sasl_setprop( ctx, SASL_SEC_PROPS,
 504                 &ld->ld_options.ldo_sasl_secprops );
 505
 506         ccred.bv_val = NULL;
 507         ccred.bv_len = 0;
 508
 509         do {
 510                 saslrc = sasl_client_start( ctx,
 511                         mechs,
 512                         NULL,
 513                         &prompts,
 514                         &ccred.bv_val,
 515                         &credlen,
 516                         &mech );
 517
 518                 if( pmech == NULL && mech != NULL ) {
 519                         pmech = mech;
 520
 521                         if( flags != LDAP_SASL_QUIET ) {
 522                                 fprintf(stderr,
 523                                         "SASL/%s authentication started\n",
 524                                         pmech );
 525                         }
 526                 }
 527
 528                 if( saslrc == SASL_INTERACT ) {
 529                         int res;
 530                         if( !interact ) break;
 531                         res = (interact)( ld, flags, defaults, prompts );
 532                         if( res != LDAP_SUCCESS ) {
 533                                 break;
 534                         }
 535                 }
 536         } while ( saslrc == SASL_INTERACT );
 537
 538         ccred.bv_len = credlen;
 539
 540         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 541                 ld->ld_errno = sasl_err2ldap( saslrc );
 542                 return ld->ld_errno;
 543         }
 544
 545         do {
 546                 struct berval *scred;
 547                 unsigned credlen;
 548
 549                 scred = NULL;
 550
 551                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 552
 553                 if ( ccred.bv_val != NULL ) {
 554                         LDAP_FREE( ccred.bv_val );
 555                         ccred.bv_val = NULL;
 556                 }
 557
 558                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 559                         if( scred ) {
 560                                 /* and server provided us with data? */
 561                                 Debug( LDAP_DEBUG_TRACE,
 562                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 563                                         rc, saslrc, scred->bv_len );
 564                                 ber_bvfree( scred );
 565                         }
 566                         return ld->ld_errno;
 567                 }
 568
 569                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 570                         /* we're done, no need to step */
 571                         if( scred ) {
 572                                 /* but server provided us with data! */
 573                                 Debug( LDAP_DEBUG_TRACE,
 574                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 575                                         rc, saslrc, scred->bv_len );
 576                                 ber_bvfree( scred );
 577                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 578                         }
 579                         break;
 580                 }
 581
 582                 do {
 583                         saslrc = sasl_client_step( ctx,
 584                                 (scred == NULL) ? NULL : scred->bv_val,
 585                                 (scred == NULL) ? 0 : scred->bv_len,
 586                                 &prompts,
 587                                 &ccred.bv_val,
 588                                 &credlen );
 589
 590                         Debug( LDAP_DEBUG_TRACE, "sasl_client_start: %d\n",
 591                                 saslrc, 0, 0 );
 592
 593                         if( saslrc == SASL_INTERACT ) {
 594                                 int res;
 595                                 if( !interact ) break;
 596                                 res = (interact)( ld, flags, defaults, prompts );
 597                                 if( res != LDAP_SUCCESS ) {
 598                                         break;
 599                                 }
 600                         }
 601                 } while ( saslrc == SASL_INTERACT );
 602
 603                 ccred.bv_len = credlen;
 604                 ber_bvfree( scred );
 605
 606                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 607                         ld->ld_errno = sasl_err2ldap( saslrc );
 608                         return ld->ld_errno;
 609                 }
 610         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 611
 612         if ( rc != LDAP_SUCCESS ) {
 613                 return rc;
 614         }
 615
 616         if ( saslrc != SASL_OK ) {
 617                 return ld->ld_errno = sasl_err2ldap( saslrc );
 618         }
 619
 620         if( flags != LDAP_SASL_QUIET ) {
 621                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (void **) &data );
 622                 if( saslrc == SASL_OK && data && *data ) {
 623                         fprintf( stderr, "SASL username: %s\n", data );
 624                 }
 625
 626                 saslrc = sasl_getprop( ctx, SASL_REALM, (void **) &data );
 627                 if( saslrc == SASL_OK && data && *data ) {
 628                         fprintf( stderr, "SASL realm: %s\n", data );
 629                 }
 630         }
 631
 632         saslrc = sasl_getprop( ctx, SASL_SSF, (void **) &ssf );
 633         if( saslrc == SASL_OK ) {
 634                 if( flags != LDAP_SASL_QUIET ) {
 635                         fprintf( stderr, "SASL SSF: %lu\n",
 636                                 (unsigned long) *ssf );
 637                 }
 638
 639                 if( ssf && *ssf ) {
 640                         if( flags != LDAP_SASL_QUIET ) {
 641                                 fprintf( stderr, "SASL installing layers\n" );
 642                         }
 643                         ldap_pvt_sasl_install( ld->ld_sb, ctx );
 644                 }
 645         }
 646
 647         return rc;
 648 }
 649
 650 int ldap_pvt_sasl_secprops(
 651         const char *in,
 652         sasl_security_properties_t *secprops )
 653 {
 654         int i;
 655         char **props = ldap_str2charray( in, "," );
 656         unsigned sflags = 0;
 657         int got_sflags = 0;
 658         sasl_ssf_t max_ssf = 0;
 659         int got_max_ssf = 0;
 660         sasl_ssf_t min_ssf = 0;
 661         int got_min_ssf = 0;
 662         unsigned maxbufsize = 0;
 663         int got_maxbufsize = 0;
 664
 665         if( props == NULL || secprops == NULL ) {
 666                 return LDAP_PARAM_ERROR;
 667         }
 668
 669         for( i=0; props[i]; i++ ) {
 670                 if( !strcasecmp(props[i], "none") ) {
 671                         got_sflags++;
 672
 673                 } else if( !strcasecmp(props[i], "noplain") ) {
 674                         got_sflags++;
 675                         sflags |= SASL_SEC_NOPLAINTEXT;
 676
 677                 } else if( !strcasecmp(props[i], "noactive") ) {
 678                         got_sflags++;
 679                         sflags |= SASL_SEC_NOACTIVE;
 680
 681                 } else if( !strcasecmp(props[i], "nodict") ) {
 682                         got_sflags++;
 683                         sflags |= SASL_SEC_NODICTIONARY;
 684
 685                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 686                         got_sflags++;
 687                         sflags |= SASL_SEC_FORWARD_SECRECY;
 688
 689                 } else if( !strcasecmp(props[i], "noanonymous")) {
 690                         got_sflags++;
 691                         sflags |= SASL_SEC_NOANONYMOUS;
 692
 693                 } else if( !strcasecmp(props[i], "passcred") ) {
 694                         got_sflags++;
 695                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 696
 697                 } else if( !strncasecmp(props[i],
 698                         "minssf=", sizeof("minssf")) )
 699                 {
 700                         if( isdigit( props[i][sizeof("minssf")] ) ) {
 701                                 got_min_ssf++;
 702                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 703                         } else {
 704                                 return LDAP_NOT_SUPPORTED;
 705                         }
 706
 707                 } else if( !strncasecmp(props[i],
 708                         "maxssf=", sizeof("maxssf")) )
 709                 {
 710                         if( isdigit( props[i][sizeof("maxssf")] ) ) {
 711                                 got_max_ssf++;
 712                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 713                         } else {
 714                                 return LDAP_NOT_SUPPORTED;
 715                         }
 716
 717                 } else if( !strncasecmp(props[i],
 718                         "maxbufsize=", sizeof("maxbufsize")) )
 719                 {
 720                         if( isdigit( props[i][sizeof("maxbufsize")] ) ) {
 721                                 got_maxbufsize++;
 722                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 723                         } else {
 724                                 return LDAP_NOT_SUPPORTED;
 725                         }
 726
 727                 } else {
 728                         return LDAP_NOT_SUPPORTED;
 729                 }
 730         }
 731
 732         if(got_sflags) {
 733                 secprops->security_flags = sflags;
 734         }
 735         if(got_min_ssf) {
 736                 secprops->min_ssf = min_ssf;
 737         }
 738         if(got_max_ssf) {
 739                 secprops->max_ssf = max_ssf;
 740         }
 741         if(got_maxbufsize) {
 742                 secprops->maxbufsize = maxbufsize;
 743         }
 744
 745         ldap_charray_free( props );
 746         return LDAP_SUCCESS;
 747 }
 748
 749 int
 750 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 751 {
 752         int rc;
 753
 754         switch( option ) {
 755         case LDAP_OPT_X_SASL_SECPROPS:
 756                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 757                 if( rc == LDAP_SUCCESS ) return 0;
 758         }
 759
 760         return -1;
 761 }
 762
 763 int
 764 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 765 {
 766         if ( ld == NULL )
 767                 return -1;
 768
 769         switch ( option ) {
 770                 case LDAP_OPT_X_SASL_MECH: {
 771                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 772                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 773                 } break;
 774                 case LDAP_OPT_X_SASL_REALM: {
 775                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 776                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 777                 } break;
 778                 case LDAP_OPT_X_SASL_AUTHCID: {
 779                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 780                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 781                 } break;
 782                 case LDAP_OPT_X_SASL_AUTHZID: {
 783                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 784                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 785                 } break;
 786
 787                 case LDAP_OPT_X_SASL_SSF: {
 788                         int sc;
 789                         sasl_ssf_t      *ssf;
 790                         sasl_conn_t *ctx;
 791
 792                         if( ld->ld_defconn == NULL ) {
 793                                 return -1;
 794                         }
 795
 796                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 797
 798                         if ( ctx == NULL ) {
 799                                 return -1;
 800                         }
 801
 802                         sc = sasl_getprop( ctx, SASL_SSF,
 803                                 (void **) &ssf );
 804
 805                         if ( sc != SASL_OK ) {
 806                                 return -1;
 807                         }
 808
 809                         *(ber_len_t *)arg = *ssf;
 810                 } break;
 811
 812                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 813                         /* this option is write only */
 814                         return -1;
 815
 816                 case LDAP_OPT_X_SASL_SSF_MIN:
 817                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 818                         break;
 819                 case LDAP_OPT_X_SASL_SSF_MAX:
 820                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 821                         break;
 822                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 823                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 824                         break;
 825
 826                 case LDAP_OPT_X_SASL_SECPROPS:
 827                         /* this option is write only */
 828                         return -1;
 829
 830                 default:
 831                         return -1;
 832         }
 833         return 0;
 834 }
 835
 836 int
 837 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 838 {
 839         if ( ld == NULL )
 840                 return -1;
 841
 842         switch ( option ) {
 843         case LDAP_OPT_X_SASL_SSF:
 844                 /* This option is read-only */
 845                 return -1;
 846
 847         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
 848                 int sc;
 849                 sasl_external_properties_t extprops;
 850                 sasl_conn_t *ctx;
 851
 852                 if( ld->ld_defconn == NULL ) {
 853                         return -1;
 854                 }
 855
 856                 ctx = ld->ld_defconn->lconn_sasl_ctx;
 857
 858                 if ( ctx == NULL ) {
 859                         return -1;
 860                 }
 861
 862                 memset(&extprops, 0L, sizeof(extprops));
 863
 864                 extprops.ssf = * (ber_len_t *) arg;
 865
 866                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 867                         (void *) &extprops );
 868
 869                 if ( sc != SASL_OK ) {
 870                         return -1;
 871                 }
 872                 } break;
 873
 874         case LDAP_OPT_X_SASL_SSF_MIN:
 875                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
 876                 break;
 877         case LDAP_OPT_X_SASL_SSF_MAX:
 878                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
 879                 break;
 880         case LDAP_OPT_X_SASL_MAXBUFSIZE:
 881                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
 882                 break;
 883
 884         case LDAP_OPT_X_SASL_SECPROPS: {
 885                 int sc;
 886                 sc = ldap_pvt_sasl_secprops( (char *) arg,
 887                         &ld->ld_options.ldo_sasl_secprops );
 888
 889                 return sc == LDAP_SUCCESS ? 0 : -1;
 890                 }
 891
 892         default:
 893                 return -1;
 894         }
 895         return 0;
 896 }
 897
 898 #ifdef LDAP_R_COMPILE
 899 void *ldap_pvt_sasl_mutex_new(void)
 900 {
 901         ldap_pvt_thread_mutex_t *mutex;
 902
 903         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
 904                 sizeof(ldap_pvt_thread_mutex_t) );
 905
 906         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
 907                 return mutex;
 908         }
 909         return NULL;
 910 }
 911
 912 int ldap_pvt_sasl_mutex_lock(void *mutex)
 913 {
 914         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
 915                 ? SASL_FAIL : SASL_OK;
 916 }
 917
 918 int ldap_pvt_sasl_mutex_unlock(void *mutex)
 919 {
 920         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
 921                 ? SASL_FAIL : SASL_OK;
 922 }
 923
 924 void ldap_pvt_sasl_mutex_dispose(void *mutex)
 925 {
 926         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
 927         LDAP_FREE( mutex );
 928 }
 929 #endif
 930
 931 #else
 932 int ldap_int_sasl_init( void )
 933 { return LDAP_SUCCESS; }
 934
 935 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 936 { return LDAP_SUCCESS; }
 937
 938 int
 939 ldap_int_sasl_bind(
 940         LDAP                    *ld,
 941         const char              *dn,
 942         const char              *mechs,
 943         LDAPControl             **sctrls,
 944         LDAPControl             **cctrls,
 945         unsigned                flags,
 946         LDAP_SASL_INTERACT_PROC *interact,
 947         void * defaults )
 948 { return LDAP_NOT_SUPPORTED; }
 949 #endif /* HAVE_CYRUS_SASL */