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 #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         ber_len_t ssf )
 466 {
 467         int rc;
 468         sasl_conn_t *ctx;
 469
 470         assert( lc->lconn_sasl_ctx == NULL );
 471
 472         if ( host == NULL ) {
 473                 ld->ld_errno = LDAP_LOCAL_ERROR;
 474                 return ld->ld_errno;
 475         }
 476
 477 #if SASL_VERSION_MAJOR >= 2
 478         rc = sasl_client_new( "ldap", host, NULL, NULL,
 479                 NULL, 0, &ctx );
 480 #else
 481         rc = sasl_client_new( "ldap", host, NULL,
 482                 SASL_SECURITY_LAYER, &ctx );
 483 #endif
 484
 485         if ( rc != SASL_OK ) {
 486                 ld->ld_errno = sasl_err2ldap( rc );
 487                 return ld->ld_errno;
 488         }
 489
 490 #ifdef NEW_LOGGING
 491         LDAP_LOG ( TRANSPORT, DETAIL1, "ldap_int_sasl_open: host=%s\n",
 492                 host, 0, 0 );
 493 #else
 494         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 495                 host, 0, 0 );
 496 #endif
 497
 498         lc->lconn_sasl_ctx = ctx;
 499
 500         if( ssf ) {
 501 #if SASL_VERSION_MAJOR >= 2
 502                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 503                         (void *) &ssf );
 504 #else
 505                 sasl_external_properties_t extprops;
 506                 memset(&extprops, 0L, sizeof(extprops));
 507                 extprops.ssf = ssf;
 508
 509                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 510                         (void *) &extprops );
 511 #endif
 512 #ifdef NEW_LOGGING
 513                 LDAP_LOG ( TRANSPORT, DETAIL1,
 514                         "ldap_int_sasl_open: ssf=%ld\n", (long) ssf, 0, 0 );
 515 #else
 516                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 517                         (long) ssf, 0, 0 );
 518 #endif
 519         }
 520
 521         return LDAP_SUCCESS;
 522 }
 523
 524 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 525 {
 526         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 527
 528         if( ctx != NULL ) {
 529                 sasl_dispose( &ctx );
 530                 lc->lconn_sasl_ctx = NULL;
 531         }
 532
 533         return LDAP_SUCCESS;
 534 }
 535
 536 int
 537 ldap_int_sasl_bind(
 538         LDAP                    *ld,
 539         const char              *dn,
 540         const char              *mechs,
 541         LDAPControl             **sctrls,
 542         LDAPControl             **cctrls,
 543         unsigned                flags,
 544         LDAP_SASL_INTERACT_PROC *interact,
 545         void * defaults )
 546 {
 547         char *data;
 548         const char *mech = NULL;
 549         const char *pmech = NULL;
 550         int                     saslrc, rc;
 551         sasl_ssf_t              *ssf = NULL;
 552         sasl_conn_t     *ctx;
 553         sasl_interact_t *prompts = NULL;
 554         unsigned credlen;
 555         struct berval ccred;
 556         ber_socket_t            sd;
 557
 558 #ifdef NEW_LOGGING
 559         LDAP_LOG ( TRANSPORT, ARGS, "ldap_int_sasl_bind: %s\n",
 560                 mechs ? mechs : "<null>", 0, 0 );
 561 #else
 562         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 563                 mechs ? mechs : "<null>", 0, 0 );
 564 #endif
 565
 566         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 567         if (ld->ld_version < LDAP_VERSION3) {
 568                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 569                 return ld->ld_errno;
 570         }
 571
 572         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 573
 574         if ( sd == AC_SOCKET_INVALID ) {
 575                 /* not connected yet */
 576                 int rc;
 577
 578                 rc = ldap_open_defconn( ld );
 579                 if( rc < 0 ) return ld->ld_errno;
 580
 581                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 582
 583                 if( sd == AC_SOCKET_INVALID ) {
 584                         ld->ld_errno = LDAP_LOCAL_ERROR;
 585                         return ld->ld_errno;
 586                 }
 587         }
 588
 589         ctx = ld->ld_defconn->lconn_sasl_ctx;
 590
 591         if( ctx == NULL ) {
 592                 ld->ld_errno = LDAP_LOCAL_ERROR;
 593                 return ld->ld_errno;
 594         }
 595
 596         /* (re)set security properties */
 597         sasl_setprop( ctx, SASL_SEC_PROPS,
 598                 &ld->ld_options.ldo_sasl_secprops );
 599
 600         ccred.bv_val = NULL;
 601         ccred.bv_len = 0;
 602
 603         do {
 604                 saslrc = sasl_client_start( ctx,
 605                         mechs,
 606 #if SASL_VERSION_MAJOR < 2
 607                         NULL,
 608 #endif
 609                         &prompts,
 610                         (SASL_CONST char **)&ccred.bv_val,
 611                         &credlen,
 612                         &mech );
 613
 614                 if( pmech == NULL && mech != NULL ) {
 615                         pmech = mech;
 616
 617                         if( flags != LDAP_SASL_QUIET ) {
 618                                 fprintf(stderr,
 619                                         "SASL/%s authentication started\n",
 620                                         pmech );
 621                         }
 622                 }
 623
 624 #if SASL_VERSION_MAJOR >= 2
 625                 /* XXX the application should free interact results. */
 626                 if ( prompts != NULL && prompts->result != NULL ) {
 627                         LDAP_FREE( (void *)prompts->result );
 628                         prompts->result = NULL;
 629                 }
 630 #endif
 631
 632                 if( saslrc == SASL_INTERACT ) {
 633                         int res;
 634                         if( !interact ) break;
 635                         res = (interact)( ld, flags, defaults, prompts );
 636                         if( res != LDAP_SUCCESS ) {
 637                                 break;
 638                         }
 639                 }
 640         } while ( saslrc == SASL_INTERACT );
 641
 642         ccred.bv_len = credlen;
 643
 644         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 645                 ld->ld_errno = sasl_err2ldap( saslrc );
 646 #if SASL_VERSION_MAJOR >= 2
 647                 ld->ld_error = (char *)sasl_errdetail( ctx );
 648 #endif
 649                 return ld->ld_errno;
 650         }
 651
 652         do {
 653                 struct berval *scred;
 654                 unsigned credlen;
 655
 656                 scred = NULL;
 657
 658                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 659
 660                 if ( ccred.bv_val != NULL ) {
 661 #if SASL_VERSION_MAJOR < 2
 662                         LDAP_FREE( ccred.bv_val );
 663 #endif
 664                         ccred.bv_val = NULL;
 665                 }
 666
 667                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 668                         if( scred && scred->bv_len ) {
 669                                 /* and server provided us with data? */
 670 #ifdef NEW_LOGGING
 671                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 672                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 673                                         rc, saslrc, scred->bv_len );
 674 #else
 675                                 Debug( LDAP_DEBUG_TRACE,
 676                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 677                                         rc, saslrc, scred->bv_len );
 678 #endif
 679                                 ber_bvfree( scred );
 680                         }
 681                         return ld->ld_errno;
 682                 }
 683
 684                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 685                         /* we're done, no need to step */
 686                         if( scred && scred->bv_len ) {
 687                                 /* but server provided us with data! */
 688 #ifdef NEW_LOGGING
 689                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 690                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 691                                         rc, saslrc, scred->bv_len );
 692 #else
 693                                 Debug( LDAP_DEBUG_TRACE,
 694                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 695                                         rc, saslrc, scred->bv_len );
 696 #endif
 697                                 ber_bvfree( scred );
 698                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 699                         }
 700                         break;
 701                 }
 702
 703                 do {
 704                         saslrc = sasl_client_step( ctx,
 705                                 (scred == NULL) ? NULL : scred->bv_val,
 706                                 (scred == NULL) ? 0 : scred->bv_len,
 707                                 &prompts,
 708                                 (SASL_CONST char **)&ccred.bv_val,
 709                                 &credlen );
 710
 711 #ifdef NEW_LOGGING
 712                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 713                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc,0,0 );
 714 #else
 715                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 716                                 saslrc, 0, 0 );
 717 #endif
 718
 719 #if SASL_VERSION_MAJOR >= 2
 720                         /* XXX the application should free interact results. */
 721                         if ( prompts != NULL && prompts->result != NULL ) {
 722                                 LDAP_FREE( (void *)prompts->result );
 723                                 prompts->result = NULL;
 724                         }
 725 #endif
 726
 727                         if( saslrc == SASL_INTERACT ) {
 728                                 int res;
 729                                 if( !interact ) break;
 730                                 res = (interact)( ld, flags, defaults, prompts );
 731                                 if( res != LDAP_SUCCESS ) {
 732                                         break;
 733                                 }
 734                         }
 735                 } while ( saslrc == SASL_INTERACT );
 736
 737                 ccred.bv_len = credlen;
 738                 ber_bvfree( scred );
 739
 740                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 741                         ld->ld_errno = sasl_err2ldap( saslrc );
 742 #if SASL_VERSION_MAJOR >= 2
 743                         ld->ld_error = (char *)sasl_errdetail( ctx );
 744 #endif
 745                         return ld->ld_errno;
 746                 }
 747         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 748
 749         if ( rc != LDAP_SUCCESS ) {
 750                 return rc;
 751         }
 752
 753         if ( saslrc != SASL_OK ) {
 754 #if SASL_VERSION_MAJOR >= 2
 755                 ld->ld_error = (char *)sasl_errdetail( ctx );
 756 #endif
 757                 return ld->ld_errno = sasl_err2ldap( saslrc );
 758         }
 759
 760         if( flags != LDAP_SASL_QUIET ) {
 761                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 762                 if( saslrc == SASL_OK && data && *data ) {
 763                         fprintf( stderr, "SASL username: %s\n", data );
 764                 }
 765
 766 #if SASL_VERSION_MAJOR >= 2
 767                 saslrc = sasl_getprop( ctx, SASL_DEFUSERREALM, (SASL_CONST void **) &data );
 768 #else
 769                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 770 #endif
 771                 if( saslrc == SASL_OK && data && *data ) {
 772                         fprintf( stderr, "SASL realm: %s\n", data );
 773                 }
 774         }
 775
 776         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 777         if( saslrc == SASL_OK ) {
 778                 if( flags != LDAP_SASL_QUIET ) {
 779                         fprintf( stderr, "SASL SSF: %lu\n",
 780                                 (unsigned long) *ssf );
 781                 }
 782
 783                 if( ssf && *ssf ) {
 784                         if( flags != LDAP_SASL_QUIET ) {
 785                                 fprintf( stderr, "SASL installing layers\n" );
 786                         }
 787                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 788                 }
 789         }
 790
 791         return rc;
 792 }
 793
 794 int
 795 ldap_int_sasl_external(
 796         LDAP *ld,
 797         LDAPConn *conn,
 798         const char * authid,
 799         ber_len_t ssf )
 800 {
 801         int sc;
 802         sasl_conn_t *ctx;
 803 #if SASL_VERSION_MAJOR < 2
 804         sasl_external_properties_t extprops;
 805 #endif
 806
 807         ctx = conn->lconn_sasl_ctx;
 808
 809         if ( ctx == NULL ) {
 810                 return LDAP_LOCAL_ERROR;
 811         }
 812
 813 #if SASL_VERSION_MAJOR >= 2
 814         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 815         if ( sc == SASL_OK )
 816                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 817 #else
 818         memset( &extprops, '\0', sizeof(extprops) );
 819         extprops.ssf = ssf;
 820         extprops.auth_id = (char *) authid;
 821
 822         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 823                 (void *) &extprops );
 824 #endif
 825
 826         if ( sc != SASL_OK ) {
 827                 return LDAP_LOCAL_ERROR;
 828         }
 829
 830         return LDAP_SUCCESS;
 831 }
 832
 833
 834 int ldap_pvt_sasl_secprops(
 835         const char *in,
 836         sasl_security_properties_t *secprops )
 837 {
 838         int i;
 839         char **props = ldap_str2charray( in, "," );
 840         unsigned sflags = 0;
 841         int got_sflags = 0;
 842         sasl_ssf_t max_ssf = 0;
 843         int got_max_ssf = 0;
 844         sasl_ssf_t min_ssf = 0;
 845         int got_min_ssf = 0;
 846         unsigned maxbufsize = 0;
 847         int got_maxbufsize = 0;
 848
 849         if( props == NULL || secprops == NULL ) {
 850                 return LDAP_PARAM_ERROR;
 851         }
 852
 853         for( i=0; props[i]; i++ ) {
 854                 if( !strcasecmp(props[i], "none") ) {
 855                         got_sflags++;
 856
 857                 } else if( !strcasecmp(props[i], "noplain") ) {
 858                         got_sflags++;
 859                         sflags |= SASL_SEC_NOPLAINTEXT;
 860
 861                 } else if( !strcasecmp(props[i], "noactive") ) {
 862                         got_sflags++;
 863                         sflags |= SASL_SEC_NOACTIVE;
 864
 865                 } else if( !strcasecmp(props[i], "nodict") ) {
 866                         got_sflags++;
 867                         sflags |= SASL_SEC_NODICTIONARY;
 868
 869                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 870                         got_sflags++;
 871                         sflags |= SASL_SEC_FORWARD_SECRECY;
 872
 873                 } else if( !strcasecmp(props[i], "noanonymous")) {
 874                         got_sflags++;
 875                         sflags |= SASL_SEC_NOANONYMOUS;
 876
 877                 } else if( !strcasecmp(props[i], "passcred") ) {
 878                         got_sflags++;
 879                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 880
 881                 } else if( !strncasecmp(props[i],
 882                         "minssf=", sizeof("minssf")) )
 883                 {
 884                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 885                                 got_min_ssf++;
 886                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 887                         } else {
 888                                 return LDAP_NOT_SUPPORTED;
 889                         }
 890
 891                 } else if( !strncasecmp(props[i],
 892                         "maxssf=", sizeof("maxssf")) )
 893                 {
 894                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 895                                 got_max_ssf++;
 896                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 897                         } else {
 898                                 return LDAP_NOT_SUPPORTED;
 899                         }
 900
 901                 } else if( !strncasecmp(props[i],
 902                         "maxbufsize=", sizeof("maxbufsize")) )
 903                 {
 904                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 905                                 got_maxbufsize++;
 906                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 907                         } else {
 908                                 return LDAP_NOT_SUPPORTED;
 909                         }
 910
 911                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 912                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 913                         {
 914                                 /* bad maxbufsize */
 915                                 return LDAP_PARAM_ERROR;
 916                         }
 917
 918                 } else {
 919                         return LDAP_NOT_SUPPORTED;
 920                 }
 921         }
 922
 923         if(got_sflags) {
 924                 secprops->security_flags = sflags;
 925         }
 926         if(got_min_ssf) {
 927                 secprops->min_ssf = min_ssf;
 928         }
 929         if(got_max_ssf) {
 930                 secprops->max_ssf = max_ssf;
 931         }
 932         if(got_maxbufsize) {
 933                 secprops->maxbufsize = maxbufsize;
 934         }
 935
 936         ldap_charray_free( props );
 937         return LDAP_SUCCESS;
 938 }
 939
 940 int
 941 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 942 {
 943         int rc;
 944
 945         switch( option ) {
 946         case LDAP_OPT_X_SASL_SECPROPS:
 947                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 948                 if( rc == LDAP_SUCCESS ) return 0;
 949         }
 950
 951         return -1;
 952 }
 953
 954 int
 955 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 956 {
 957         if ( ld == NULL )
 958                 return -1;
 959
 960         switch ( option ) {
 961                 case LDAP_OPT_X_SASL_MECH: {
 962                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 963                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 964                 } break;
 965                 case LDAP_OPT_X_SASL_REALM: {
 966                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 967                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 968                 } break;
 969                 case LDAP_OPT_X_SASL_AUTHCID: {
 970                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 971                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 972                 } break;
 973                 case LDAP_OPT_X_SASL_AUTHZID: {
 974                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 975                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 976                 } break;
 977
 978                 case LDAP_OPT_X_SASL_SSF: {
 979                         int sc;
 980                         sasl_ssf_t      *ssf;
 981                         sasl_conn_t *ctx;
 982
 983                         if( ld->ld_defconn == NULL ) {
 984                                 return -1;
 985                         }
 986
 987                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 988
 989                         if ( ctx == NULL ) {
 990                                 return -1;
 991                         }
 992
 993                         sc = sasl_getprop( ctx, SASL_SSF,
 994                                 (SASL_CONST void **) &ssf );
 995
 996                         if ( sc != SASL_OK ) {
 997                                 return -1;
 998                         }
 999
1000                         *(ber_len_t *)arg = *ssf;
1001                 } break;
1002
1003                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
1004                         /* this option is write only */
1005                         return -1;
1006
1007                 case LDAP_OPT_X_SASL_SSF_MIN:
1008                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
1009                         break;
1010                 case LDAP_OPT_X_SASL_SSF_MAX:
1011                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
1012                         break;
1013                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1014                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1015                         break;
1016
1017                 case LDAP_OPT_X_SASL_SECPROPS:
1018                         /* this option is write only */
1019                         return -1;
1020
1021                 default:
1022                         return -1;
1023         }
1024         return 0;
1025 }
1026
1027 int
1028 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1029 {
1030         if ( ld == NULL )
1031                 return -1;
1032
1033         switch ( option ) {
1034         case LDAP_OPT_X_SASL_SSF:
1035                 /* This option is read-only */
1036                 return -1;
1037
1038         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1039                 int sc;
1040 #if SASL_VERSION_MAJOR < 2
1041                 sasl_external_properties_t extprops;
1042 #endif
1043                 sasl_conn_t *ctx;
1044
1045                 if( ld->ld_defconn == NULL ) {
1046                         return -1;
1047                 }
1048
1049                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1050
1051                 if ( ctx == NULL ) {
1052                         return -1;
1053                 }
1054
1055 #if SASL_VERSION_MAJOR >= 2
1056                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1057 #else
1058                 memset(&extprops, 0L, sizeof(extprops));
1059
1060                 extprops.ssf = * (ber_len_t *) arg;
1061
1062                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1063                         (void *) &extprops );
1064 #endif
1065
1066                 if ( sc != SASL_OK ) {
1067                         return -1;
1068                 }
1069                 } break;
1070
1071         case LDAP_OPT_X_SASL_SSF_MIN:
1072                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1073                 break;
1074         case LDAP_OPT_X_SASL_SSF_MAX:
1075                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1076                 break;
1077         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1078                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1079                 break;
1080
1081         case LDAP_OPT_X_SASL_SECPROPS: {
1082                 int sc;
1083                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1084                         &ld->ld_options.ldo_sasl_secprops );
1085
1086                 return sc == LDAP_SUCCESS ? 0 : -1;
1087                 }
1088
1089         default:
1090                 return -1;
1091         }
1092         return 0;
1093 }
1094
1095 #ifdef LDAP_R_COMPILE
1096 #define LDAP_DEBUG_R_SASL
1097 void *ldap_pvt_sasl_mutex_new(void)
1098 {
1099         ldap_pvt_thread_mutex_t *mutex;
1100
1101         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1102                 sizeof(ldap_pvt_thread_mutex_t) );
1103
1104         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1105                 return mutex;
1106         }
1107 #ifndef LDAP_DEBUG_R_SASL
1108         assert( 0 );
1109 #endif /* !LDAP_DEBUG_R_SASL */
1110         return NULL;
1111 }
1112
1113 int ldap_pvt_sasl_mutex_lock(void *mutex)
1114 {
1115 #ifdef LDAP_DEBUG_R_SASL
1116         if ( mutex == NULL ) {
1117                 return SASL_OK;
1118         }
1119 #else /* !LDAP_DEBUG_R_SASL */
1120         assert( mutex );
1121 #endif /* !LDAP_DEBUG_R_SASL */
1122         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1123                 ? SASL_FAIL : SASL_OK;
1124 }
1125
1126 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1127 {
1128 #ifdef LDAP_DEBUG_R_SASL
1129         if ( mutex == NULL ) {
1130                 return SASL_OK;
1131         }
1132 #else /* !LDAP_DEBUG_R_SASL */
1133         assert( mutex );
1134 #endif /* !LDAP_DEBUG_R_SASL */
1135         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1136                 ? SASL_FAIL : SASL_OK;
1137 }
1138
1139 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1140 {
1141 #ifdef LDAP_DEBUG_R_SASL
1142         if ( mutex == NULL ) {
1143                 return;
1144         }
1145 #else /* !LDAP_DEBUG_R_SASL */
1146         assert( mutex );
1147 #endif /* !LDAP_DEBUG_R_SASL */
1148         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1149         LDAP_FREE( mutex );
1150 }
1151 #endif
1152
1153 #else
1154 int ldap_int_sasl_init( void )
1155 { return LDAP_SUCCESS; }
1156
1157 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1158 { return LDAP_SUCCESS; }
1159
1160 int
1161 ldap_int_sasl_bind(
1162         LDAP                    *ld,
1163         const char              *dn,
1164         const char              *mechs,
1165         LDAPControl             **sctrls,
1166         LDAPControl             **cctrls,
1167         unsigned                flags,
1168         LDAP_SASL_INTERACT_PROC *interact,
1169         void * defaults )
1170 { return LDAP_NOT_SUPPORTED; }
1171
1172 int
1173 ldap_int_sasl_external(
1174         LDAP *ld,
1175         LDAPConn *conn,
1176         const char * authid,
1177         ber_len_t ssf )
1178 { return LDAP_SUCCESS; }
1179
1180 #endif /* HAVE_CYRUS_SASL */