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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2003 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 #ifdef HAVE_SASL_SASL_H
  27 #include <sasl/sasl.h>
  28 #else
  29 #include <sasl.h>
  30 #endif
  31
  32 #if SASL_VERSION_MAJOR >= 2
  33 #define SASL_CONST const
  34 #else
  35 #define SASL_CONST
  36 #endif
  37
  38 /*
  39 * Various Cyrus SASL related stuff.
  40 */
  41
  42 int ldap_int_sasl_init( void )
  43 {
  44         /* XXX not threadsafe */
  45         static int sasl_initialized = 0;
  46
  47         static sasl_callback_t client_callbacks[] = {
  48 #ifdef SASL_CB_GETREALM
  49                 { SASL_CB_GETREALM, NULL, NULL },
  50 #endif
  51                 { SASL_CB_USER, NULL, NULL },
  52                 { SASL_CB_AUTHNAME, NULL, NULL },
  53                 { SASL_CB_PASS, NULL, NULL },
  54                 { SASL_CB_ECHOPROMPT, NULL, NULL },
  55                 { SASL_CB_NOECHOPROMPT, NULL, NULL },
  56                 { SASL_CB_LIST_END, NULL, NULL }
  57         };
  58
  59 #ifdef HAVE_SASL_VERSION
  60 #define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
  61         (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
  62
  63         { int rc;
  64         sasl_version( NULL, &rc );
  65         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
  66                 (rc & 0xffff) < SASL_VERSION_STEP) {
  67
  68 #ifdef NEW_LOGGING
  69                 LDAP_LOG( TRANSPORT, INFO,
  70                 "ldap_int_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
  71                         rc, SASL_BUILD_VERSION, 0 );
  72 #else
  73                 Debug( LDAP_DEBUG_ANY,
  74                 "ldap_int_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
  75                         rc, SASL_BUILD_VERSION, 0 );
  76 #endif
  77                 return -1;
  78         }
  79         }
  80 #endif
  81         if ( sasl_initialized ) {
  82                 return 0;
  83         }
  84
  85 /* SASL 2 takes care of its own memory completely internally */
  86 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
  87         sasl_set_alloc(
  88                 ber_memalloc,
  89                 ber_memcalloc,
  90                 ber_memrealloc,
  91                 ber_memfree );
  92 #endif /* CSRIMALLOC */
  93
  94 #ifdef LDAP_R_COMPILE
  95         sasl_set_mutex(
  96                 ldap_pvt_sasl_mutex_new,
  97                 ldap_pvt_sasl_mutex_lock,
  98                 ldap_pvt_sasl_mutex_unlock,
  99                 ldap_pvt_sasl_mutex_dispose );
 100
 101         ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
 102 #endif
 103
 104         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
 105                 sasl_initialized = 1;
 106                 return 0;
 107         }
 108
 109 #if SASL_VERSION_MAJOR < 2
 110         /* A no-op to make sure we link with Cyrus 1.5 */
 111         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
 112 #endif
 113         return -1;
 114 }
 115
 116 /*
 117  * SASL encryption support for LBER Sockbufs
 118  */
 119
 120 struct sb_sasl_data {
 121         sasl_conn_t             *sasl_context;
 122         unsigned                *sasl_maxbuf;
 123         Sockbuf_Buf             sec_buf_in;
 124         Sockbuf_Buf             buf_in;
 125         Sockbuf_Buf             buf_out;
 126 };
 127
 128 static int
 129 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
 130 {
 131         struct sb_sasl_data     *p;
 132
 133         assert( sbiod != NULL );
 134
 135         p = LBER_MALLOC( sizeof( *p ) );
 136         if ( p == NULL )
 137                 return -1;
 138         p->sasl_context = (sasl_conn_t *)arg;
 139         ber_pvt_sb_buf_init( &p->sec_buf_in );
 140         ber_pvt_sb_buf_init( &p->buf_in );
 141         ber_pvt_sb_buf_init( &p->buf_out );
 142         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 143                 LBER_FREE( p );
 144                 errno = ENOMEM;
 145                 return -1;
 146         }
 147         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
 148                 (SASL_CONST void **) &p->sasl_maxbuf );
 149
 150         sbiod->sbiod_pvt = p;
 151
 152         return 0;
 153 }
 154
 155 static int
 156 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 157 {
 158         struct sb_sasl_data     *p;
 159
 160         assert( sbiod != NULL );
 161
 162         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 163 #if SASL_VERSION_MAJOR >= 2
 164         /*
 165          * SASLv2 encode/decode buffers are managed by
 166          * libsasl2. Ensure they are not freed by liblber.
 167          */
 168         p->buf_in.buf_base = NULL;
 169         p->buf_out.buf_base = NULL;
 170 #endif
 171         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 172         ber_pvt_sb_buf_destroy( &p->buf_in );
 173         ber_pvt_sb_buf_destroy( &p->buf_out );
 174         LBER_FREE( p );
 175         sbiod->sbiod_pvt = NULL;
 176         return 0;
 177 }
 178
 179 static ber_len_t
 180 sb_sasl_pkt_length( const unsigned char *buf, unsigned max, int debuglevel )
 181 {
 182         ber_len_t               size;
 183
 184         assert( buf != NULL );
 185
 186         size = buf[0] << 24
 187                 | buf[1] << 16
 188                 | buf[2] << 8
 189                 | buf[3];
 190
 191         if ( size > SASL_MAX_BUFF_SIZE ) {
 192                 /* somebody is trying to mess me up. */
 193                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 194                         "sb_sasl_pkt_length: received illegal packet length "
 195                         "of %lu bytes\n", (unsigned long)size );
 196                 size = 16; /* this should lead to an error. */
 197         }
 198
 199         return size + 4; /* include the size !!! */
 200 }
 201
 202 /* Drop a processed packet from the input buffer */
 203 static void
 204 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, unsigned max, int debuglevel )
 205 {
 206         ber_slen_t                      len;
 207
 208         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 209         if ( len > 0 )
 210                 AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
 211                         sec_buf_in->buf_end, len );
 212
 213         if ( len >= 4 ) {
 214                 sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
 215                         max, debuglevel);
 216         }
 217         else {
 218                 sec_buf_in->buf_end = 0;
 219         }
 220         sec_buf_in->buf_ptr = len;
 221 }
 222
 223 static ber_slen_t
 224 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 225 {
 226         struct sb_sasl_data     *p;
 227         ber_slen_t              ret, bufptr;
 228
 229         assert( sbiod != NULL );
 230         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 231
 232         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 233
 234         /* Are there anything left in the buffer? */
 235         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 236         bufptr = ret;
 237         len -= ret;
 238
 239         if ( len == 0 )
 240                 return bufptr;
 241
 242 #if SASL_VERSION_MAJOR >= 2
 243         ber_pvt_sb_buf_init( &p->buf_in );
 244 #else
 245         ber_pvt_sb_buf_destroy( &p->buf_in );
 246 #endif
 247
 248         /* Read the length of the packet */
 249         while ( p->sec_buf_in.buf_ptr < 4 ) {
 250                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 251                         4 - p->sec_buf_in.buf_ptr );
 252 #ifdef EINTR
 253                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 254                         continue;
 255 #endif
 256                 if ( ret <= 0 )
 257                         return bufptr ? bufptr : ret;
 258
 259                 p->sec_buf_in.buf_ptr += ret;
 260         }
 261
 262         /* The new packet always starts at p->sec_buf_in.buf_base */
 263         ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
 264                 *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 265
 266         /* Grow the packet buffer if neccessary */
 267         if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
 268                 ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 )
 269         {
 270                 errno = ENOMEM;
 271                 return -1;
 272         }
 273         p->sec_buf_in.buf_end = ret;
 274
 275         /* Did we read the whole encrypted packet? */
 276         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 277                 /* No, we have got only a part of it */
 278                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 279
 280                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 281                         p->sec_buf_in.buf_ptr, ret );
 282 #ifdef EINTR
 283                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 284                         continue;
 285 #endif
 286                 if ( ret <= 0 )
 287                         return bufptr ? bufptr : ret;
 288
 289                 p->sec_buf_in.buf_ptr += ret;
 290         }
 291
 292         /* Decode the packet */
 293         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 294                 p->sec_buf_in.buf_end,
 295                 (SASL_CONST char **)&p->buf_in.buf_base,
 296                 (unsigned *)&p->buf_in.buf_end );
 297
 298         /* Drop the packet from the input buffer */
 299         sb_sasl_drop_packet( &p->sec_buf_in,
 300                         *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 301
 302         if ( ret != SASL_OK ) {
 303                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 304                         "sb_sasl_read: failed to decode packet: %s\n",
 305                         sasl_errstring( ret, NULL, NULL ) );
 306                 errno = EIO;
 307                 return -1;
 308         }
 309
 310         p->buf_in.buf_size = p->buf_in.buf_end;
 311
 312         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 313
 314         return bufptr;
 315 }
 316
 317 static ber_slen_t
 318 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 319 {
 320         struct sb_sasl_data     *p;
 321         int                     ret;
 322
 323         assert( sbiod != NULL );
 324         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 325
 326         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 327
 328         /* Are there anything left in the buffer? */
 329         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 330                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 331                 if ( ret < 0 )
 332                         return ret;
 333                 /* Still have something left?? */
 334                 if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 335                         errno = EAGAIN;
 336                         return 0;
 337                 }
 338         }
 339
 340         /* now encode the next packet. */
 341 #if SASL_VERSION_MAJOR >= 2
 342         ber_pvt_sb_buf_init( &p->buf_out );
 343         /* sasl v2 makes sure this number is correct */
 344         if ( len > *p->sasl_maxbuf )
 345                 len = *p->sasl_maxbuf;
 346 #else
 347         ber_pvt_sb_buf_destroy( &p->buf_out );
 348         if ( len > *p->sasl_maxbuf - 100 )
 349                 len = *p->sasl_maxbuf - 100;    /* For safety margin */
 350 #endif
 351         ret = sasl_encode( p->sasl_context, buf, len,
 352                 (SASL_CONST char **)&p->buf_out.buf_base,
 353                 (unsigned *)&p->buf_out.buf_size );
 354         if ( ret != SASL_OK ) {
 355                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 356                         "sb_sasl_write: failed to encode packet: %s\n",
 357                         sasl_errstring( ret, NULL, NULL ) );
 358                 return -1;
 359         }
 360         p->buf_out.buf_end = p->buf_out.buf_size;
 361
 362         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 363         if ( ret <= 0 )
 364                 return ret;
 365         return len;
 366 }
 367
 368 static int
 369 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 370 {
 371         struct sb_sasl_data     *p;
 372
 373         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 374
 375         if ( opt == LBER_SB_OPT_DATA_READY ) {
 376                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 377                         return 1;
 378         }
 379
 380         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 381 }
 382
 383 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 384         sb_sasl_setup,          /* sbi_setup */
 385         sb_sasl_remove,         /* sbi_remove */
 386         sb_sasl_ctrl,           /* sbi_ctrl */
 387         sb_sasl_read,           /* sbi_read */
 388         sb_sasl_write,          /* sbi_write */
 389         NULL                    /* sbi_close */
 390 };
 391
 392 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 393 {
 394 #ifdef NEW_LOGGING
 395         LDAP_LOG ( TRANSPORT, ENTRY, "ldap_pvt_sasl_install\n", 0, 0, 0 );
 396 #else
 397         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 398                 0, 0, 0 );
 399 #endif
 400
 401         /* don't install the stuff unless security has been negotiated */
 402
 403         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 404                         &ldap_pvt_sockbuf_io_sasl ) )
 405         {
 406 #ifdef LDAP_DEBUG
 407                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 408                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 409 #endif
 410                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 411                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 412         }
 413
 414         return LDAP_SUCCESS;
 415 }
 416
 417 static int
 418 sasl_err2ldap( int saslerr )
 419 {
 420         int rc;
 421
 422         switch (saslerr) {
 423                 case SASL_CONTINUE:
 424                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 425                         break;
 426                 case SASL_INTERACT:
 427                         rc = LDAP_LOCAL_ERROR;
 428                         break;
 429                 case SASL_OK:
 430                         rc = LDAP_SUCCESS;
 431                         break;
 432                 case SASL_FAIL:
 433                         rc = LDAP_LOCAL_ERROR;
 434                         break;
 435                 case SASL_NOMEM:
 436                         rc = LDAP_NO_MEMORY;
 437                         break;
 438                 case SASL_NOMECH:
 439                         rc = LDAP_AUTH_UNKNOWN;
 440                         break;
 441                 case SASL_BADAUTH:
 442                         rc = LDAP_AUTH_UNKNOWN;
 443                         break;
 444                 case SASL_NOAUTHZ:
 445                         rc = LDAP_PARAM_ERROR;
 446                         break;
 447                 case SASL_TOOWEAK:
 448                 case SASL_ENCRYPT:
 449                         rc = LDAP_AUTH_UNKNOWN;
 450                         break;
 451                 default:
 452                         rc = LDAP_LOCAL_ERROR;
 453                         break;
 454         }
 455
 456         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 457         return rc;
 458 }
 459
 460 int
 461 ldap_int_sasl_open(
 462         LDAP *ld,
 463         LDAPConn *lc,
 464         const char * host )
 465 {
 466         int rc;
 467         sasl_conn_t *ctx;
 468
 469         assert( lc->lconn_sasl_ctx == NULL );
 470
 471         if ( host == NULL ) {
 472                 ld->ld_errno = LDAP_LOCAL_ERROR;
 473                 return ld->ld_errno;
 474         }
 475
 476 #if SASL_VERSION_MAJOR >= 2
 477         rc = sasl_client_new( "ldap", host, NULL, NULL,
 478                 NULL, 0, &ctx );
 479 #else
 480         rc = sasl_client_new( "ldap", host, NULL,
 481                 SASL_SECURITY_LAYER, &ctx );
 482 #endif
 483
 484         if ( rc != SASL_OK ) {
 485                 ld->ld_errno = sasl_err2ldap( rc );
 486                 return ld->ld_errno;
 487         }
 488
 489 #ifdef NEW_LOGGING
 490         LDAP_LOG ( TRANSPORT, DETAIL1, "ldap_int_sasl_open: host=%s\n",
 491                 host, 0, 0 );
 492 #else
 493         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 494                 host, 0, 0 );
 495 #endif
 496
 497         lc->lconn_sasl_ctx = ctx;
 498
 499         return LDAP_SUCCESS;
 500 }
 501
 502 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 503 {
 504         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 505
 506         if( ctx != NULL ) {
 507                 sasl_dispose( &ctx );
 508                 lc->lconn_sasl_ctx = NULL;
 509         }
 510
 511         return LDAP_SUCCESS;
 512 }
 513
 514 int
 515 ldap_int_sasl_bind(
 516         LDAP                    *ld,
 517         const char              *dn,
 518         const char              *mechs,
 519         LDAPControl             **sctrls,
 520         LDAPControl             **cctrls,
 521         unsigned                flags,
 522         LDAP_SASL_INTERACT_PROC *interact,
 523         void * defaults )
 524 {
 525         char *data;
 526         const char *mech = NULL;
 527         const char *pmech = NULL;
 528         int                     saslrc, rc;
 529         sasl_ssf_t              *ssf = NULL;
 530         sasl_conn_t     *ctx;
 531         sasl_interact_t *prompts = NULL;
 532         unsigned credlen;
 533         struct berval ccred;
 534         ber_socket_t            sd;
 535
 536 #ifdef NEW_LOGGING
 537         LDAP_LOG ( TRANSPORT, ARGS, "ldap_int_sasl_bind: %s\n",
 538                 mechs ? mechs : "<null>", 0, 0 );
 539 #else
 540         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 541                 mechs ? mechs : "<null>", 0, 0 );
 542 #endif
 543
 544         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 545         if (ld->ld_version < LDAP_VERSION3) {
 546                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 547                 return ld->ld_errno;
 548         }
 549
 550         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 551
 552         if ( sd == AC_SOCKET_INVALID ) {
 553                 /* not connected yet */
 554                 int rc;
 555
 556                 rc = ldap_open_defconn( ld );
 557                 if( rc < 0 ) return ld->ld_errno;
 558
 559                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 560
 561                 if( sd == AC_SOCKET_INVALID ) {
 562                         ld->ld_errno = LDAP_LOCAL_ERROR;
 563                         return ld->ld_errno;
 564                 }
 565         }
 566
 567         ctx = ld->ld_defconn->lconn_sasl_ctx;
 568
 569         if( ctx == NULL ) {
 570                 ld->ld_errno = LDAP_LOCAL_ERROR;
 571                 return ld->ld_errno;
 572         }
 573
 574         /* (re)set security properties */
 575         sasl_setprop( ctx, SASL_SEC_PROPS,
 576                 &ld->ld_options.ldo_sasl_secprops );
 577
 578         ccred.bv_val = NULL;
 579         ccred.bv_len = 0;
 580
 581         do {
 582                 saslrc = sasl_client_start( ctx,
 583                         mechs,
 584 #if SASL_VERSION_MAJOR < 2
 585                         NULL,
 586 #endif
 587                         &prompts,
 588                         (SASL_CONST char **)&ccred.bv_val,
 589                         &credlen,
 590                         &mech );
 591
 592                 if( pmech == NULL && mech != NULL ) {
 593                         pmech = mech;
 594
 595                         if( flags != LDAP_SASL_QUIET ) {
 596                                 fprintf(stderr,
 597                                         "SASL/%s authentication started\n",
 598                                         pmech );
 599                         }
 600                 }
 601
 602 #if SASL_VERSION_MAJOR >= 2
 603                 /* XXX the application should free interact results. */
 604                 if ( prompts != NULL && prompts->result != NULL ) {
 605                         LDAP_FREE( (void *)prompts->result );
 606                         prompts->result = NULL;
 607                 }
 608 #endif
 609
 610                 if( saslrc == SASL_INTERACT ) {
 611                         int res;
 612                         if( !interact ) break;
 613                         res = (interact)( ld, flags, defaults, prompts );
 614                         if( res != LDAP_SUCCESS ) {
 615                                 break;
 616                         }
 617                 }
 618         } while ( saslrc == SASL_INTERACT );
 619
 620         ccred.bv_len = credlen;
 621
 622         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 623                 ld->ld_errno = sasl_err2ldap( saslrc );
 624 #if SASL_VERSION_MAJOR >= 2
 625                 ld->ld_error = (char *)sasl_errdetail( ctx );
 626 #endif
 627                 return ld->ld_errno;
 628         }
 629
 630         do {
 631                 struct berval *scred;
 632                 unsigned credlen;
 633
 634                 scred = NULL;
 635
 636                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 637
 638                 if ( ccred.bv_val != NULL ) {
 639 #if SASL_VERSION_MAJOR < 2
 640                         LDAP_FREE( ccred.bv_val );
 641 #endif
 642                         ccred.bv_val = NULL;
 643                 }
 644
 645                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 646                         if( scred && scred->bv_len ) {
 647                                 /* and server provided us with data? */
 648 #ifdef NEW_LOGGING
 649                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 650                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 651                                         rc, saslrc, scred->bv_len );
 652 #else
 653                                 Debug( LDAP_DEBUG_TRACE,
 654                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 655                                         rc, saslrc, scred->bv_len );
 656 #endif
 657                                 ber_bvfree( scred );
 658                         }
 659                         return ld->ld_errno;
 660                 }
 661
 662                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 663                         /* we're done, no need to step */
 664                         if( scred && scred->bv_len ) {
 665                                 /* but server provided us with data! */
 666 #ifdef NEW_LOGGING
 667                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 668                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 669                                         rc, saslrc, scred->bv_len );
 670 #else
 671                                 Debug( LDAP_DEBUG_TRACE,
 672                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 673                                         rc, saslrc, scred->bv_len );
 674 #endif
 675                                 ber_bvfree( scred );
 676                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 677                         }
 678                         break;
 679                 }
 680
 681                 do {
 682                         saslrc = sasl_client_step( ctx,
 683                                 (scred == NULL) ? NULL : scred->bv_val,
 684                                 (scred == NULL) ? 0 : scred->bv_len,
 685                                 &prompts,
 686                                 (SASL_CONST char **)&ccred.bv_val,
 687                                 &credlen );
 688
 689 #ifdef NEW_LOGGING
 690                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 691                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc,0,0 );
 692 #else
 693                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 694                                 saslrc, 0, 0 );
 695 #endif
 696
 697 #if SASL_VERSION_MAJOR >= 2
 698                         /* XXX the application should free interact results. */
 699                         if ( prompts != NULL && prompts->result != NULL ) {
 700                                 LDAP_FREE( (void *)prompts->result );
 701                                 prompts->result = NULL;
 702                         }
 703 #endif
 704
 705                         if( saslrc == SASL_INTERACT ) {
 706                                 int res;
 707                                 if( !interact ) break;
 708                                 res = (interact)( ld, flags, defaults, prompts );
 709                                 if( res != LDAP_SUCCESS ) {
 710                                         break;
 711                                 }
 712                         }
 713                 } while ( saslrc == SASL_INTERACT );
 714
 715                 ccred.bv_len = credlen;
 716                 ber_bvfree( scred );
 717
 718                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 719                         ld->ld_errno = sasl_err2ldap( saslrc );
 720 #if SASL_VERSION_MAJOR >= 2
 721                         ld->ld_error = (char *)sasl_errdetail( ctx );
 722 #endif
 723                         return ld->ld_errno;
 724                 }
 725         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 726
 727         if ( rc != LDAP_SUCCESS ) {
 728                 return rc;
 729         }
 730
 731         if ( saslrc != SASL_OK ) {
 732 #if SASL_VERSION_MAJOR >= 2
 733                 ld->ld_error = (char *)sasl_errdetail( ctx );
 734 #endif
 735                 return ld->ld_errno = sasl_err2ldap( saslrc );
 736         }
 737
 738         if( flags != LDAP_SASL_QUIET ) {
 739                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 740                 if( saslrc == SASL_OK && data && *data ) {
 741                         fprintf( stderr, "SASL username: %s\n", data );
 742                 }
 743
 744 #if SASL_VERSION_MAJOR >= 2
 745                 saslrc = sasl_getprop( ctx, SASL_DEFUSERREALM, (SASL_CONST void **) &data );
 746 #else
 747                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 748 #endif
 749                 if( saslrc == SASL_OK && data && *data ) {
 750                         fprintf( stderr, "SASL realm: %s\n", data );
 751                 }
 752         }
 753
 754         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 755         if( saslrc == SASL_OK ) {
 756                 if( flags != LDAP_SASL_QUIET ) {
 757                         fprintf( stderr, "SASL SSF: %lu\n",
 758                                 (unsigned long) *ssf );
 759                 }
 760
 761                 if( ssf && *ssf ) {
 762                         if( flags != LDAP_SASL_QUIET ) {
 763                                 fprintf( stderr, "SASL installing layers\n" );
 764                         }
 765                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 766                 }
 767         }
 768
 769         return rc;
 770 }
 771
 772 int
 773 ldap_int_sasl_external(
 774         LDAP *ld,
 775         LDAPConn *conn,
 776         const char * authid,
 777         ber_len_t ssf )
 778 {
 779         int sc;
 780         sasl_conn_t *ctx;
 781 #if SASL_VERSION_MAJOR < 2
 782         sasl_external_properties_t extprops;
 783 #endif
 784
 785         ctx = conn->lconn_sasl_ctx;
 786
 787         if ( ctx == NULL ) {
 788                 return LDAP_LOCAL_ERROR;
 789         }
 790
 791 #if SASL_VERSION_MAJOR >= 2
 792         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 793         if ( sc == SASL_OK )
 794                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 795 #else
 796         memset( &extprops, '\0', sizeof(extprops) );
 797         extprops.ssf = ssf;
 798         extprops.auth_id = (char *) authid;
 799
 800         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 801                 (void *) &extprops );
 802 #endif
 803
 804         if ( sc != SASL_OK ) {
 805                 return LDAP_LOCAL_ERROR;
 806         }
 807
 808         return LDAP_SUCCESS;
 809 }
 810
 811
 812 int ldap_pvt_sasl_secprops(
 813         const char *in,
 814         sasl_security_properties_t *secprops )
 815 {
 816         int i;
 817         char **props = ldap_str2charray( in, "," );
 818         unsigned sflags = 0;
 819         int got_sflags = 0;
 820         sasl_ssf_t max_ssf = 0;
 821         int got_max_ssf = 0;
 822         sasl_ssf_t min_ssf = 0;
 823         int got_min_ssf = 0;
 824         unsigned maxbufsize = 0;
 825         int got_maxbufsize = 0;
 826
 827         if( props == NULL || secprops == NULL ) {
 828                 return LDAP_PARAM_ERROR;
 829         }
 830
 831         for( i=0; props[i]; i++ ) {
 832                 if( !strcasecmp(props[i], "none") ) {
 833                         got_sflags++;
 834
 835                 } else if( !strcasecmp(props[i], "noplain") ) {
 836                         got_sflags++;
 837                         sflags |= SASL_SEC_NOPLAINTEXT;
 838
 839                 } else if( !strcasecmp(props[i], "noactive") ) {
 840                         got_sflags++;
 841                         sflags |= SASL_SEC_NOACTIVE;
 842
 843                 } else if( !strcasecmp(props[i], "nodict") ) {
 844                         got_sflags++;
 845                         sflags |= SASL_SEC_NODICTIONARY;
 846
 847                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 848                         got_sflags++;
 849                         sflags |= SASL_SEC_FORWARD_SECRECY;
 850
 851                 } else if( !strcasecmp(props[i], "noanonymous")) {
 852                         got_sflags++;
 853                         sflags |= SASL_SEC_NOANONYMOUS;
 854
 855                 } else if( !strcasecmp(props[i], "passcred") ) {
 856                         got_sflags++;
 857                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 858
 859                 } else if( !strncasecmp(props[i],
 860                         "minssf=", sizeof("minssf")) )
 861                 {
 862                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 863                                 got_min_ssf++;
 864                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 865                         } else {
 866                                 return LDAP_NOT_SUPPORTED;
 867                         }
 868
 869                 } else if( !strncasecmp(props[i],
 870                         "maxssf=", sizeof("maxssf")) )
 871                 {
 872                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 873                                 got_max_ssf++;
 874                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 875                         } else {
 876                                 return LDAP_NOT_SUPPORTED;
 877                         }
 878
 879                 } else if( !strncasecmp(props[i],
 880                         "maxbufsize=", sizeof("maxbufsize")) )
 881                 {
 882                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 883                                 got_maxbufsize++;
 884                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 885                         } else {
 886                                 return LDAP_NOT_SUPPORTED;
 887                         }
 888
 889                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 890                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 891                         {
 892                                 /* bad maxbufsize */
 893                                 return LDAP_PARAM_ERROR;
 894                         }
 895
 896                 } else {
 897                         return LDAP_NOT_SUPPORTED;
 898                 }
 899         }
 900
 901         if(got_sflags) {
 902                 secprops->security_flags = sflags;
 903         }
 904         if(got_min_ssf) {
 905                 secprops->min_ssf = min_ssf;
 906         }
 907         if(got_max_ssf) {
 908                 secprops->max_ssf = max_ssf;
 909         }
 910         if(got_maxbufsize) {
 911                 secprops->maxbufsize = maxbufsize;
 912         }
 913
 914         ldap_charray_free( props );
 915         return LDAP_SUCCESS;
 916 }
 917
 918 int
 919 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 920 {
 921         int rc;
 922
 923         switch( option ) {
 924         case LDAP_OPT_X_SASL_SECPROPS:
 925                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 926                 if( rc == LDAP_SUCCESS ) return 0;
 927         }
 928
 929         return -1;
 930 }
 931
 932 int
 933 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 934 {
 935         if ( ld == NULL )
 936                 return -1;
 937
 938         switch ( option ) {
 939                 case LDAP_OPT_X_SASL_MECH: {
 940                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 941                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 942                 } break;
 943                 case LDAP_OPT_X_SASL_REALM: {
 944                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 945                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 946                 } break;
 947                 case LDAP_OPT_X_SASL_AUTHCID: {
 948                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 949                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 950                 } break;
 951                 case LDAP_OPT_X_SASL_AUTHZID: {
 952                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 953                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 954                 } break;
 955
 956                 case LDAP_OPT_X_SASL_SSF: {
 957                         int sc;
 958                         sasl_ssf_t      *ssf;
 959                         sasl_conn_t *ctx;
 960
 961                         if( ld->ld_defconn == NULL ) {
 962                                 return -1;
 963                         }
 964
 965                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 966
 967                         if ( ctx == NULL ) {
 968                                 return -1;
 969                         }
 970
 971                         sc = sasl_getprop( ctx, SASL_SSF,
 972                                 (SASL_CONST void **) &ssf );
 973
 974                         if ( sc != SASL_OK ) {
 975                                 return -1;
 976                         }
 977
 978                         *(ber_len_t *)arg = *ssf;
 979                 } break;
 980
 981                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 982                         /* this option is write only */
 983                         return -1;
 984
 985                 case LDAP_OPT_X_SASL_SSF_MIN:
 986                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 987                         break;
 988                 case LDAP_OPT_X_SASL_SSF_MAX:
 989                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 990                         break;
 991                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 992                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 993                         break;
 994
 995                 case LDAP_OPT_X_SASL_SECPROPS:
 996                         /* this option is write only */
 997                         return -1;
 998
 999                 default:
1000                         return -1;
1001         }
1002         return 0;
1003 }
1004
1005 int
1006 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1007 {
1008         if ( ld == NULL )
1009                 return -1;
1010
1011         switch ( option ) {
1012         case LDAP_OPT_X_SASL_SSF:
1013                 /* This option is read-only */
1014                 return -1;
1015
1016         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1017                 int sc;
1018 #if SASL_VERSION_MAJOR < 2
1019                 sasl_external_properties_t extprops;
1020 #endif
1021                 sasl_conn_t *ctx;
1022
1023                 if( ld->ld_defconn == NULL ) {
1024                         return -1;
1025                 }
1026
1027                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1028
1029                 if ( ctx == NULL ) {
1030                         return -1;
1031                 }
1032
1033 #if SASL_VERSION_MAJOR >= 2
1034                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1035 #else
1036                 memset(&extprops, 0L, sizeof(extprops));
1037
1038                 extprops.ssf = * (ber_len_t *) arg;
1039
1040                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1041                         (void *) &extprops );
1042 #endif
1043
1044                 if ( sc != SASL_OK ) {
1045                         return -1;
1046                 }
1047                 } break;
1048
1049         case LDAP_OPT_X_SASL_SSF_MIN:
1050                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1051                 break;
1052         case LDAP_OPT_X_SASL_SSF_MAX:
1053                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1054                 break;
1055         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1056                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1057                 break;
1058
1059         case LDAP_OPT_X_SASL_SECPROPS: {
1060                 int sc;
1061                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1062                         &ld->ld_options.ldo_sasl_secprops );
1063
1064                 return sc == LDAP_SUCCESS ? 0 : -1;
1065                 }
1066
1067         default:
1068                 return -1;
1069         }
1070         return 0;
1071 }
1072
1073 #ifdef LDAP_R_COMPILE
1074 #define LDAP_DEBUG_R_SASL
1075 void *ldap_pvt_sasl_mutex_new(void)
1076 {
1077         ldap_pvt_thread_mutex_t *mutex;
1078
1079         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1080                 sizeof(ldap_pvt_thread_mutex_t) );
1081
1082         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1083                 return mutex;
1084         }
1085 #ifndef LDAP_DEBUG_R_SASL
1086         assert( 0 );
1087 #endif /* !LDAP_DEBUG_R_SASL */
1088         return NULL;
1089 }
1090
1091 int ldap_pvt_sasl_mutex_lock(void *mutex)
1092 {
1093 #ifdef LDAP_DEBUG_R_SASL
1094         if ( mutex == NULL ) {
1095                 return SASL_OK;
1096         }
1097 #else /* !LDAP_DEBUG_R_SASL */
1098         assert( mutex );
1099 #endif /* !LDAP_DEBUG_R_SASL */
1100         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1101                 ? SASL_FAIL : SASL_OK;
1102 }
1103
1104 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1105 {
1106 #ifdef LDAP_DEBUG_R_SASL
1107         if ( mutex == NULL ) {
1108                 return SASL_OK;
1109         }
1110 #else /* !LDAP_DEBUG_R_SASL */
1111         assert( mutex );
1112 #endif /* !LDAP_DEBUG_R_SASL */
1113         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1114                 ? SASL_FAIL : SASL_OK;
1115 }
1116
1117 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1118 {
1119 #ifdef LDAP_DEBUG_R_SASL
1120         if ( mutex == NULL ) {
1121                 return;
1122         }
1123 #else /* !LDAP_DEBUG_R_SASL */
1124         assert( mutex );
1125 #endif /* !LDAP_DEBUG_R_SASL */
1126         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1127         LDAP_FREE( mutex );
1128 }
1129 #endif
1130
1131 #else
1132 int ldap_int_sasl_init( void )
1133 { return LDAP_SUCCESS; }
1134
1135 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1136 { return LDAP_SUCCESS; }
1137
1138 int
1139 ldap_int_sasl_bind(
1140         LDAP                    *ld,
1141         const char              *dn,
1142         const char              *mechs,
1143         LDAPControl             **sctrls,
1144         LDAPControl             **cctrls,
1145         unsigned                flags,
1146         LDAP_SASL_INTERACT_PROC *interact,
1147         void * defaults )
1148 { return LDAP_NOT_SUPPORTED; }
1149
1150 int
1151 ldap_int_sasl_external(
1152         LDAP *ld,
1153         LDAPConn *conn,
1154         const char * authid,
1155         ber_len_t ssf )
1156 { return LDAP_SUCCESS; }
1157
1158 #endif /* HAVE_CYRUS_SASL */