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