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         if ( sasl_initialized ) {
  60                 return 0;
  61         }
  62
  63 #ifndef CSRIMALLOC
  64         sasl_set_alloc(
  65                 ber_memalloc,
  66                 ber_memcalloc,
  67                 ber_memrealloc,
  68                 ber_memfree );
  69 #endif /* CSRIMALLOC */
  70
  71 #ifdef LDAP_R_COMPILE
  72         sasl_set_mutex(
  73                 ldap_pvt_sasl_mutex_new,
  74                 ldap_pvt_sasl_mutex_lock,
  75                 ldap_pvt_sasl_mutex_unlock,
  76                 ldap_pvt_sasl_mutex_dispose );
  77
  78         ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
  79 #endif
  80
  81         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
  82                 sasl_initialized = 1;
  83                 return 0;
  84         }
  85
  86         return -1;
  87 }
  88
  89 /*
  90  * SASL encryption support for LBER Sockbufs
  91  */
  92
  93 struct sb_sasl_data {
  94         sasl_conn_t             *sasl_context;
  95         Sockbuf_Buf             sec_buf_in;
  96         Sockbuf_Buf             buf_in;
  97         Sockbuf_Buf             buf_out;
  98 };
  99
 100 static int
 101 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
 102 {
 103         struct sb_sasl_data     *p;
 104
 105         assert( sbiod != NULL );
 106
 107         p = LBER_MALLOC( sizeof( *p ) );
 108         if ( p == NULL )
 109                 return -1;
 110         p->sasl_context = (sasl_conn_t *)arg;
 111         ber_pvt_sb_buf_init( &p->sec_buf_in );
 112         ber_pvt_sb_buf_init( &p->buf_in );
 113         ber_pvt_sb_buf_init( &p->buf_out );
 114         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 115                 errno = ENOMEM;
 116                 return -1;
 117         }
 118
 119         sbiod->sbiod_pvt = p;
 120
 121         return 0;
 122 }
 123
 124 static int
 125 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 126 {
 127         struct sb_sasl_data     *p;
 128
 129         assert( sbiod != NULL );
 130
 131         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 132 #if SASL_VERSION_MAJOR >= 2
 133         /*
 134          * SASLv2 encode/decode buffers are managed by
 135          * libsasl2. Ensure they are not freed by liblber.
 136          */
 137         p->buf_in.buf_base = NULL;
 138         p->buf_out.buf_base = NULL;
 139 #endif
 140         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 141         ber_pvt_sb_buf_destroy( &p->buf_in );
 142         ber_pvt_sb_buf_destroy( &p->buf_out );
 143         LBER_FREE( p );
 144         sbiod->sbiod_pvt = NULL;
 145         return 0;
 146 }
 147
 148 static ber_len_t
 149 sb_sasl_pkt_length( const unsigned char *buf, int debuglevel )
 150 {
 151         ber_len_t               size;
 152
 153         assert( buf != NULL );
 154
 155         size = buf[0] << 24
 156                 | buf[1] << 16
 157                 | buf[2] << 8
 158                 | buf[3];
 159
 160         /* we really should check against actual buffer size set
 161          * in the secopts.
 162          */
 163         if ( size > SASL_MAX_BUFF_SIZE ) {
 164                 /* somebody is trying to mess me up. */
 165                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 166                         "sb_sasl_pkt_length: received illegal packet length "
 167                         "of %lu bytes\n", (unsigned long)size );
 168                 size = 16; /* this should lead to an error. */
 169         }
 170
 171         return size + 4; /* include the size !!! */
 172 }
 173
 174 /* Drop a processed packet from the input buffer */
 175 static void
 176 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel )
 177 {
 178         ber_slen_t                      len;
 179
 180         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 181         if ( len > 0 )
 182                 AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
 183                         sec_buf_in->buf_end, len );
 184
 185         if ( len >= 4 ) {
 186                 sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
 187                         debuglevel);
 188         }
 189         else {
 190                 sec_buf_in->buf_end = 0;
 191         }
 192         sec_buf_in->buf_ptr = len;
 193 }
 194
 195 static ber_slen_t
 196 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 197 {
 198         struct sb_sasl_data     *p;
 199         ber_slen_t              ret, bufptr;
 200
 201         assert( sbiod != NULL );
 202         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 203
 204         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 205
 206         /* Are there anything left in the buffer? */
 207         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 208         bufptr = ret;
 209         len -= ret;
 210
 211         if ( len == 0 )
 212                 return bufptr;
 213
 214 #if SASL_VERSION_MAJOR >= 2
 215         ber_pvt_sb_buf_init( &p->buf_in );
 216 #else
 217         ber_pvt_sb_buf_destroy( &p->buf_in );
 218 #endif
 219
 220         /* Read the length of the packet */
 221         while ( p->sec_buf_in.buf_ptr < 4 ) {
 222                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 223                         4 - p->sec_buf_in.buf_ptr );
 224 #ifdef EINTR
 225                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 226                         continue;
 227 #endif
 228                 if ( ret <= 0 )
 229                         return ret;
 230
 231                 p->sec_buf_in.buf_ptr += ret;
 232         }
 233
 234         /* The new packet always starts at p->sec_buf_in.buf_base */
 235         ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
 236                 sbiod->sbiod_sb->sb_debug );
 237
 238         /* Grow the packet buffer if neccessary */
 239         if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
 240                 ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 )
 241         {
 242                 errno = ENOMEM;
 243                 return -1;
 244         }
 245         p->sec_buf_in.buf_end = ret;
 246
 247         /* Did we read the whole encrypted packet? */
 248         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 249                 /* No, we have got only a part of it */
 250                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 251
 252                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 253                         p->sec_buf_in.buf_ptr, ret );
 254 #ifdef EINTR
 255                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 256                         continue;
 257 #endif
 258                 if ( ret <= 0 )
 259                         return ret;
 260
 261                 p->sec_buf_in.buf_ptr += ret;
 262         }
 263
 264         /* Decode the packet */
 265         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 266                 p->sec_buf_in.buf_end,
 267                 (SASL_CONST char **)&p->buf_in.buf_base,
 268                 (unsigned *)&p->buf_in.buf_end );
 269         if ( ret != SASL_OK ) {
 270                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 271                         "sb_sasl_read: failed to decode packet: %s\n",
 272                         sasl_errstring( ret, NULL, NULL ) );
 273                 sb_sasl_drop_packet( &p->sec_buf_in,
 274                         sbiod->sbiod_sb->sb_debug );
 275                 errno = EIO;
 276                 return -1;
 277         }
 278
 279         /* Drop the packet from the input buffer */
 280         sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug );
 281
 282         p->buf_in.buf_size = p->buf_in.buf_end;
 283
 284         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 285
 286         return bufptr;
 287 }
 288
 289 static ber_slen_t
 290 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 291 {
 292         struct sb_sasl_data     *p;
 293         int                     ret;
 294
 295         assert( sbiod != NULL );
 296         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 297
 298         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 299
 300         /* Are there anything left in the buffer? */
 301         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 302                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 303                 if ( ret <= 0 )
 304                         return ret;
 305         }
 306
 307         /* now encode the next packet. */
 308 #if SASL_VERSION_MAJOR >= 2
 309         ber_pvt_sb_buf_init( &p->buf_out );
 310 #else
 311         ber_pvt_sb_buf_destroy( &p->buf_out );
 312 #endif
 313         ret = sasl_encode( p->sasl_context, buf, len,
 314                 (SASL_CONST char **)&p->buf_out.buf_base,
 315                 (unsigned *)&p->buf_out.buf_size );
 316         if ( ret != SASL_OK ) {
 317                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 318                         "sb_sasl_write: failed to encode packet: %s\n",
 319                         sasl_errstring( ret, NULL, NULL ) );
 320                 return -1;
 321         }
 322         p->buf_out.buf_end = p->buf_out.buf_size;
 323
 324         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 325         if ( ret <= 0 )
 326                 return ret;
 327         return len;
 328 }
 329
 330 static int
 331 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 332 {
 333         struct sb_sasl_data     *p;
 334
 335         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 336
 337         if ( opt == LBER_SB_OPT_DATA_READY ) {
 338                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 339                         return 1;
 340         }
 341
 342         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 343 }
 344
 345 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 346         sb_sasl_setup,          /* sbi_setup */
 347         sb_sasl_remove,         /* sbi_remove */
 348         sb_sasl_ctrl,           /* sbi_ctrl */
 349         sb_sasl_read,           /* sbi_read */
 350         sb_sasl_write,          /* sbi_write */
 351         NULL                    /* sbi_close */
 352 };
 353
 354 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 355 {
 356 #ifdef NEW_LOGGING
 357         LDAP_LOG (( "cyrus", LDAP_LEVEL_ENTRY, "ldap_pvt_sasl_install\n" ));
 358 #else
 359         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 360                 0, 0, 0 );
 361 #endif
 362
 363         /* don't install the stuff unless security has been negotiated */
 364
 365         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 366                         &ldap_pvt_sockbuf_io_sasl ) )
 367         {
 368 #ifdef LDAP_DEBUG
 369                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 370                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 371 #endif
 372                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 373                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 374         }
 375
 376         return LDAP_SUCCESS;
 377 }
 378
 379 static int
 380 sasl_err2ldap( int saslerr )
 381 {
 382         int rc;
 383
 384         switch (saslerr) {
 385                 case SASL_CONTINUE:
 386                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 387                         break;
 388                 case SASL_INTERACT:
 389                         rc = LDAP_LOCAL_ERROR;
 390                         break;
 391                 case SASL_OK:
 392                         rc = LDAP_SUCCESS;
 393                         break;
 394                 case SASL_FAIL:
 395                         rc = LDAP_LOCAL_ERROR;
 396                         break;
 397                 case SASL_NOMEM:
 398                         rc = LDAP_NO_MEMORY;
 399                         break;
 400                 case SASL_NOMECH:
 401                         rc = LDAP_AUTH_UNKNOWN;
 402                         break;
 403                 case SASL_BADAUTH:
 404                         rc = LDAP_AUTH_UNKNOWN;
 405                         break;
 406                 case SASL_NOAUTHZ:
 407                         rc = LDAP_PARAM_ERROR;
 408                         break;
 409                 case SASL_TOOWEAK:
 410                 case SASL_ENCRYPT:
 411                         rc = LDAP_AUTH_UNKNOWN;
 412                         break;
 413                 default:
 414                         rc = LDAP_LOCAL_ERROR;
 415                         break;
 416         }
 417
 418         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 419         return rc;
 420 }
 421
 422 int
 423 ldap_int_sasl_open(
 424         LDAP *ld,
 425         LDAPConn *lc,
 426         const char * host,
 427         ber_len_t ssf )
 428 {
 429         int rc;
 430         sasl_conn_t *ctx;
 431
 432         sasl_callback_t *session_callbacks =
 433                 LDAP_CALLOC( 2, sizeof( sasl_callback_t ) );
 434
 435         if( session_callbacks == NULL ) return LDAP_NO_MEMORY;
 436
 437         session_callbacks[0].id = SASL_CB_USER;
 438         session_callbacks[0].proc = NULL;
 439         session_callbacks[0].context = ld;
 440
 441         session_callbacks[1].id = SASL_CB_LIST_END;
 442         session_callbacks[1].proc = NULL;
 443         session_callbacks[1].context = NULL;
 444
 445         assert( lc->lconn_sasl_ctx == NULL );
 446
 447         if ( host == NULL ) {
 448                 ld->ld_errno = LDAP_LOCAL_ERROR;
 449                 return ld->ld_errno;
 450         }
 451
 452 #if SASL_VERSION_MAJOR >= 2
 453         rc = sasl_client_new( "ldap", host, NULL, NULL,
 454                 session_callbacks, 0, &ctx );
 455 #else
 456         rc = sasl_client_new( "ldap", host, session_callbacks,
 457                 SASL_SECURITY_LAYER, &ctx );
 458         LDAP_FREE( session_callbacks );
 459 #endif
 460
 461         if ( rc != SASL_OK ) {
 462                 ld->ld_errno = sasl_err2ldap( rc );
 463                 return ld->ld_errno;
 464         }
 465
 466 #ifdef NEW_LOGGING
 467         LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 468                 "ldap_int_sasl_open: host=%s\n", host ));
 469 #else
 470         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 471                 host, 0, 0 );
 472 #endif
 473
 474         lc->lconn_sasl_ctx = ctx;
 475
 476         if( ssf ) {
 477 #if SASL_VERSION_MAJOR >= 2
 478                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 479                         (void *) &ssf );
 480 #else
 481                 sasl_external_properties_t extprops;
 482                 memset(&extprops, 0L, sizeof(extprops));
 483                 extprops.ssf = ssf;
 484
 485                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 486                         (void *) &extprops );
 487 #endif
 488 #ifdef NEW_LOGGING
 489                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 490                         "ldap_int_sasl_open: ssf=%ld\n", (long) ssf ));
 491 #else
 492                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 493                         (long) ssf, 0, 0 );
 494 #endif
 495         }
 496
 497         return LDAP_SUCCESS;
 498 }
 499
 500 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 501 {
 502         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 503
 504         if( ctx != NULL ) {
 505 #if SASL_VERSION_MAJOR >= 2
 506                 const void *callbacks;
 507                 sasl_getprop( ctx, SASL_CALLBACK, &callbacks );
 508                 LDAP_FREE( (void *)callbacks );
 509 #endif
 510                 sasl_dispose( &ctx );
 511                 lc->lconn_sasl_ctx = NULL;
 512         }
 513
 514         return LDAP_SUCCESS;
 515 }
 516
 517 int
 518 ldap_int_sasl_bind(
 519         LDAP                    *ld,
 520         const char              *dn,
 521         const char              *mechs,
 522         LDAPControl             **sctrls,
 523         LDAPControl             **cctrls,
 524         unsigned                flags,
 525         LDAP_SASL_INTERACT_PROC *interact,
 526         void * defaults )
 527 {
 528         char *data;
 529         const char *mech = NULL;
 530         const char *pmech = NULL;
 531         int                     saslrc, rc;
 532         sasl_ssf_t              *ssf = NULL;
 533         sasl_conn_t     *ctx;
 534         sasl_interact_t *prompts = NULL;
 535         unsigned credlen;
 536         struct berval ccred;
 537         ber_socket_t            sd;
 538
 539 #ifdef NEW_LOGGING
 540         LDAP_LOG (( "cyrus", LDAP_LEVEL_ARGS,
 541                         "ldap_int_sasl_bind: %s\n", mechs ? mechs : "<null>" ));
 542 #else
 543         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 544                 mechs ? mechs : "<null>", 0, 0 );
 545 #endif
 546
 547         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 548         if (ld->ld_version < LDAP_VERSION3) {
 549                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 550                 return ld->ld_errno;
 551         }
 552
 553         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 554
 555         if ( sd == AC_SOCKET_INVALID ) {
 556                 /* not connected yet */
 557                 int rc;
 558
 559                 rc = ldap_open_defconn( ld );
 560                 if( rc < 0 ) return ld->ld_errno;
 561
 562                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 563
 564                 if( sd == AC_SOCKET_INVALID ) {
 565                         ld->ld_errno = LDAP_LOCAL_ERROR;
 566                         return ld->ld_errno;
 567                 }
 568         }
 569
 570         ctx = ld->ld_defconn->lconn_sasl_ctx;
 571
 572         if( ctx == NULL ) {
 573                 ld->ld_errno = LDAP_LOCAL_ERROR;
 574                 return ld->ld_errno;
 575         }
 576
 577         /* (re)set security properties */
 578         sasl_setprop( ctx, SASL_SEC_PROPS,
 579                 &ld->ld_options.ldo_sasl_secprops );
 580
 581         ccred.bv_val = NULL;
 582         ccred.bv_len = 0;
 583
 584         do {
 585                 saslrc = sasl_client_start( ctx,
 586                         mechs,
 587 #if SASL_VERSION_MAJOR < 2
 588                         NULL,
 589 #endif
 590                         &prompts,
 591                         (SASL_CONST char **)&ccred.bv_val,
 592                         &credlen,
 593                         &mech );
 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 SASL_VERSION_MAJOR >= 2
 606                 /* XXX the application should free interact results. */
 607                 if ( prompts != NULL && prompts->result != NULL ) {
 608                         LDAP_FREE( (void *)prompts->result );
 609                         prompts->result = NULL;
 610                 }
 611 #endif
 612
 613                 if( saslrc == SASL_INTERACT ) {
 614                         int res;
 615                         if( !interact ) break;
 616                         res = (interact)( ld, flags, defaults, prompts );
 617                         if( res != LDAP_SUCCESS ) {
 618                                 break;
 619                         }
 620                 }
 621         } while ( saslrc == SASL_INTERACT );
 622
 623         ccred.bv_len = credlen;
 624
 625         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 626                 ld->ld_errno = sasl_err2ldap( saslrc );
 627 #if SASL_VERSION_MAJOR >= 2
 628                 ld->ld_error = (char *)sasl_errdetail( ctx );
 629 #endif
 630                 return ld->ld_errno;
 631         }
 632
 633         do {
 634                 struct berval *scred;
 635                 unsigned credlen;
 636
 637                 scred = NULL;
 638
 639                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 640
 641                 if ( ccred.bv_val != NULL ) {
 642 #if SASL_VERSION_MAJOR < 2
 643                         LDAP_FREE( ccred.bv_val );
 644 #endif
 645                         ccred.bv_val = NULL;
 646                 }
 647
 648                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 649                         if( scred && scred->bv_len ) {
 650                                 /* and server provided us with data? */
 651 #ifdef NEW_LOGGING
 652                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 653                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 654                                         rc, saslrc, scred->bv_len ));
 655 #else
 656                                 Debug( LDAP_DEBUG_TRACE,
 657                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 658                                         rc, saslrc, scred->bv_len );
 659 #endif
 660                                 ber_bvfree( scred );
 661                         }
 662                         return ld->ld_errno;
 663                 }
 664
 665                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 666                         /* we're done, no need to step */
 667                         if( scred && scred->bv_len ) {
 668                                 /* but server provided us with data! */
 669 #ifdef NEW_LOGGING
 670                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 671                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 672                                         rc, saslrc, scred->bv_len ));
 673 #else
 674                                 Debug( LDAP_DEBUG_TRACE,
 675                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 676                                         rc, saslrc, scred->bv_len );
 677 #endif
 678                                 ber_bvfree( scred );
 679                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 680                         }
 681                         break;
 682                 }
 683
 684                 do {
 685                         saslrc = sasl_client_step( ctx,
 686                                 (scred == NULL) ? NULL : scred->bv_val,
 687                                 (scred == NULL) ? 0 : scred->bv_len,
 688                                 &prompts,
 689                                 (SASL_CONST char **)&ccred.bv_val,
 690                                 &credlen );
 691
 692 #ifdef NEW_LOGGING
 693                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 694                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc ));
 695 #else
 696                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 697                                 saslrc, 0, 0 );
 698 #endif
 699
 700 #if SASL_VERSION_MAJOR >= 2
 701                         /* XXX the application should free interact results. */
 702                         if ( prompts != NULL && prompts->result != NULL ) {
 703                                 LDAP_FREE( (void *)prompts->result );
 704                                 prompts->result = NULL;
 705                         }
 706 #endif
 707
 708                         if( saslrc == SASL_INTERACT ) {
 709                                 int res;
 710                                 if( !interact ) break;
 711                                 res = (interact)( ld, flags, defaults, prompts );
 712                                 if( res != LDAP_SUCCESS ) {
 713                                         break;
 714                                 }
 715                         }
 716                 } while ( saslrc == SASL_INTERACT );
 717
 718                 ccred.bv_len = credlen;
 719                 ber_bvfree( scred );
 720
 721                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 722                         ld->ld_errno = sasl_err2ldap( saslrc );
 723 #if SASL_VERSION_MAJOR >= 2
 724                         ld->ld_error = (char *)sasl_errdetail( ctx );
 725 #endif
 726                         return ld->ld_errno;
 727                 }
 728         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 729
 730         if ( rc != LDAP_SUCCESS ) {
 731                 return rc;
 732         }
 733
 734         if ( saslrc != SASL_OK ) {
 735 #if SASL_VERSION_MAJOR >= 2
 736                 ld->ld_error = (char *)sasl_errdetail( ctx );
 737 #endif
 738                 return ld->ld_errno = sasl_err2ldap( saslrc );
 739         }
 740
 741         if( flags != LDAP_SASL_QUIET ) {
 742                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 743                 if( saslrc == SASL_OK && data && *data ) {
 744                         fprintf( stderr, "SASL username: %s\n", data );
 745                 }
 746
 747 #if SASL_VERSION_MAJOR >= 2
 748                 saslrc = sasl_getprop( ctx, SASL_DEFUSERREALM, (SASL_CONST void **) &data );
 749 #else
 750                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 751 #endif
 752                 if( saslrc == SASL_OK && data && *data ) {
 753                         fprintf( stderr, "SASL realm: %s\n", data );
 754                 }
 755         }
 756
 757         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 758         if( saslrc == SASL_OK ) {
 759                 if( flags != LDAP_SASL_QUIET ) {
 760                         fprintf( stderr, "SASL SSF: %lu\n",
 761                                 (unsigned long) *ssf );
 762                 }
 763
 764                 if( ssf && *ssf ) {
 765                         if( flags != LDAP_SASL_QUIET ) {
 766                                 fprintf( stderr, "SASL installing layers\n" );
 767                         }
 768                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 769                 }
 770         }
 771
 772         return rc;
 773 }
 774
 775 int
 776 ldap_int_sasl_external(
 777         LDAP *ld,
 778         LDAPConn *conn,
 779         const char * authid,
 780         ber_len_t ssf )
 781 {
 782         int sc;
 783         sasl_conn_t *ctx;
 784 #if SASL_VERSION_MAJOR < 2
 785         sasl_external_properties_t extprops;
 786 #endif
 787
 788         ctx = conn->lconn_sasl_ctx;
 789
 790         if ( ctx == NULL ) {
 791                 return LDAP_LOCAL_ERROR;
 792         }
 793
 794 #if SASL_VERSION_MAJOR >= 2
 795         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 796         if ( sc == SASL_OK )
 797                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 798 #else
 799         memset( &extprops, '\0', sizeof(extprops) );
 800         extprops.ssf = ssf;
 801         extprops.auth_id = (char *) authid;
 802
 803         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 804                 (void *) &extprops );
 805 #endif
 806
 807         if ( sc != SASL_OK ) {
 808                 return LDAP_LOCAL_ERROR;
 809         }
 810
 811         return LDAP_SUCCESS;
 812 }
 813
 814
 815 int ldap_pvt_sasl_secprops(
 816         const char *in,
 817         sasl_security_properties_t *secprops )
 818 {
 819         int i;
 820         char **props = ldap_str2charray( in, "," );
 821         unsigned sflags = 0;
 822         int got_sflags = 0;
 823         sasl_ssf_t max_ssf = 0;
 824         int got_max_ssf = 0;
 825         sasl_ssf_t min_ssf = 0;
 826         int got_min_ssf = 0;
 827         unsigned maxbufsize = 0;
 828         int got_maxbufsize = 0;
 829
 830         if( props == NULL || secprops == NULL ) {
 831                 return LDAP_PARAM_ERROR;
 832         }
 833
 834         for( i=0; props[i]; i++ ) {
 835                 if( !strcasecmp(props[i], "none") ) {
 836                         got_sflags++;
 837
 838                 } else if( !strcasecmp(props[i], "noplain") ) {
 839                         got_sflags++;
 840                         sflags |= SASL_SEC_NOPLAINTEXT;
 841
 842                 } else if( !strcasecmp(props[i], "noactive") ) {
 843                         got_sflags++;
 844                         sflags |= SASL_SEC_NOACTIVE;
 845
 846                 } else if( !strcasecmp(props[i], "nodict") ) {
 847                         got_sflags++;
 848                         sflags |= SASL_SEC_NODICTIONARY;
 849
 850                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 851                         got_sflags++;
 852                         sflags |= SASL_SEC_FORWARD_SECRECY;
 853
 854                 } else if( !strcasecmp(props[i], "noanonymous")) {
 855                         got_sflags++;
 856                         sflags |= SASL_SEC_NOANONYMOUS;
 857
 858                 } else if( !strcasecmp(props[i], "passcred") ) {
 859                         got_sflags++;
 860                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 861
 862                 } else if( !strncasecmp(props[i],
 863                         "minssf=", sizeof("minssf")) )
 864                 {
 865                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 866                                 got_min_ssf++;
 867                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 868                         } else {
 869                                 return LDAP_NOT_SUPPORTED;
 870                         }
 871
 872                 } else if( !strncasecmp(props[i],
 873                         "maxssf=", sizeof("maxssf")) )
 874                 {
 875                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 876                                 got_max_ssf++;
 877                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 878                         } else {
 879                                 return LDAP_NOT_SUPPORTED;
 880                         }
 881
 882                 } else if( !strncasecmp(props[i],
 883                         "maxbufsize=", sizeof("maxbufsize")) )
 884                 {
 885                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 886                                 got_maxbufsize++;
 887                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 888                         } else {
 889                                 return LDAP_NOT_SUPPORTED;
 890                         }
 891
 892                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 893                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 894                         {
 895                                 /* bad maxbufsize */
 896                                 return LDAP_PARAM_ERROR;
 897                         }
 898
 899                 } else {
 900                         return LDAP_NOT_SUPPORTED;
 901                 }
 902         }
 903
 904         if(got_sflags) {
 905                 secprops->security_flags = sflags;
 906         }
 907         if(got_min_ssf) {
 908                 secprops->min_ssf = min_ssf;
 909         }
 910         if(got_max_ssf) {
 911                 secprops->max_ssf = max_ssf;
 912         }
 913         if(got_maxbufsize) {
 914                 secprops->maxbufsize = maxbufsize;
 915         }
 916
 917         ldap_charray_free( props );
 918         return LDAP_SUCCESS;
 919 }
 920
 921 int
 922 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 923 {
 924         int rc;
 925
 926         switch( option ) {
 927         case LDAP_OPT_X_SASL_SECPROPS:
 928                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 929                 if( rc == LDAP_SUCCESS ) return 0;
 930         }
 931
 932         return -1;
 933 }
 934
 935 int
 936 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 937 {
 938         if ( ld == NULL )
 939                 return -1;
 940
 941         switch ( option ) {
 942                 case LDAP_OPT_X_SASL_MECH: {
 943                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 944                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 945                 } break;
 946                 case LDAP_OPT_X_SASL_REALM: {
 947                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 948                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 949                 } break;
 950                 case LDAP_OPT_X_SASL_AUTHCID: {
 951                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 952                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 953                 } break;
 954                 case LDAP_OPT_X_SASL_AUTHZID: {
 955                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 956                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 957                 } break;
 958
 959                 case LDAP_OPT_X_SASL_SSF: {
 960                         int sc;
 961                         sasl_ssf_t      *ssf;
 962                         sasl_conn_t *ctx;
 963
 964                         if( ld->ld_defconn == NULL ) {
 965                                 return -1;
 966                         }
 967
 968                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 969
 970                         if ( ctx == NULL ) {
 971                                 return -1;
 972                         }
 973
 974                         sc = sasl_getprop( ctx, SASL_SSF,
 975                                 (SASL_CONST void **) &ssf );
 976
 977                         if ( sc != SASL_OK ) {
 978                                 return -1;
 979                         }
 980
 981                         *(ber_len_t *)arg = *ssf;
 982                 } break;
 983
 984                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 985                         /* this option is write only */
 986                         return -1;
 987
 988                 case LDAP_OPT_X_SASL_SSF_MIN:
 989                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 990                         break;
 991                 case LDAP_OPT_X_SASL_SSF_MAX:
 992                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 993                         break;
 994                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 995                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 996                         break;
 997
 998                 case LDAP_OPT_X_SASL_SECPROPS:
 999                         /* this option is write only */
1000                         return -1;
1001
1002                 default:
1003                         return -1;
1004         }
1005         return 0;
1006 }
1007
1008 int
1009 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1010 {
1011         if ( ld == NULL )
1012                 return -1;
1013
1014         switch ( option ) {
1015         case LDAP_OPT_X_SASL_SSF:
1016                 /* This option is read-only */
1017                 return -1;
1018
1019         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1020                 int sc;
1021 #if SASL_VERSION_MAJOR < 2
1022                 sasl_external_properties_t extprops;
1023 #endif
1024                 sasl_conn_t *ctx;
1025
1026                 if( ld->ld_defconn == NULL ) {
1027                         return -1;
1028                 }
1029
1030                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1031
1032                 if ( ctx == NULL ) {
1033                         return -1;
1034                 }
1035
1036 #if SASL_VERSION_MAJOR >= 2
1037                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1038 #else
1039                 memset(&extprops, 0L, sizeof(extprops));
1040
1041                 extprops.ssf = * (ber_len_t *) arg;
1042
1043                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1044                         (void *) &extprops );
1045 #endif
1046
1047                 if ( sc != SASL_OK ) {
1048                         return -1;
1049                 }
1050                 } break;
1051
1052         case LDAP_OPT_X_SASL_SSF_MIN:
1053                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1054                 break;
1055         case LDAP_OPT_X_SASL_SSF_MAX:
1056                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1057                 break;
1058         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1059                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1060                 break;
1061
1062         case LDAP_OPT_X_SASL_SECPROPS: {
1063                 int sc;
1064                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1065                         &ld->ld_options.ldo_sasl_secprops );
1066
1067                 return sc == LDAP_SUCCESS ? 0 : -1;
1068                 }
1069
1070         default:
1071                 return -1;
1072         }
1073         return 0;
1074 }
1075
1076 #ifdef LDAP_R_COMPILE
1077 void *ldap_pvt_sasl_mutex_new(void)
1078 {
1079         ldap_pvt_thread_mutex_t *mutex;
1080
1081         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1082                 sizeof(ldap_pvt_thread_mutex_t) );
1083
1084         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1085                 return mutex;
1086         }
1087         return NULL;
1088 }
1089
1090 int ldap_pvt_sasl_mutex_lock(void *mutex)
1091 {
1092         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1093                 ? SASL_FAIL : SASL_OK;
1094 }
1095
1096 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1097 {
1098         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1099                 ? SASL_FAIL : SASL_OK;
1100 }
1101
1102 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1103 {
1104         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1105         LDAP_FREE( mutex );
1106 }
1107 #endif
1108
1109 #else
1110 int ldap_int_sasl_init( void )
1111 { return LDAP_SUCCESS; }
1112
1113 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1114 { return LDAP_SUCCESS; }
1115
1116 int
1117 ldap_int_sasl_bind(
1118         LDAP                    *ld,
1119         const char              *dn,
1120         const char              *mechs,
1121         LDAPControl             **sctrls,
1122         LDAPControl             **cctrls,
1123         unsigned                flags,
1124         LDAP_SASL_INTERACT_PROC *interact,
1125         void * defaults )
1126 { return LDAP_NOT_SUPPORTED; }
1127
1128 int
1129 ldap_int_sasl_external(
1130         LDAP *ld,
1131         LDAPConn *conn,
1132         const char * authid,
1133         ber_len_t ssf )
1134 { return LDAP_SUCCESS; }
1135
1136 #endif /* HAVE_CYRUS_SASL */