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         unsigned                *max;
 295
 296         assert( sbiod != NULL );
 297         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 298
 299         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 300
 301         /* Are there anything left in the buffer? */
 302         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 303                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 304                 if ( ret <= 0 )
 305                         return ret;
 306         }
 307
 308         /* now encode the next packet. */
 309 #if SASL_VERSION_MAJOR >= 2
 310         ber_pvt_sb_buf_init( &p->buf_out );
 311 #else
 312         ber_pvt_sb_buf_destroy( &p->buf_out );
 313 #endif
 314         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF, (const void **)&max );
 315         if ( len > *max - 100 )
 316                 len = *max - 100;       /* For safety margin */
 317         ret = sasl_encode( p->sasl_context, buf, len,
 318                 (SASL_CONST char **)&p->buf_out.buf_base,
 319                 (unsigned *)&p->buf_out.buf_size );
 320         if ( ret != SASL_OK ) {
 321                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 322                         "sb_sasl_write: failed to encode packet: %s\n",
 323                         sasl_errstring( ret, NULL, NULL ) );
 324                 return -1;
 325         }
 326         p->buf_out.buf_end = p->buf_out.buf_size;
 327
 328         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 329         if ( ret <= 0 )
 330                 return ret;
 331         return len;
 332 }
 333
 334 static int
 335 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 336 {
 337         struct sb_sasl_data     *p;
 338
 339         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 340
 341         if ( opt == LBER_SB_OPT_DATA_READY ) {
 342                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 343                         return 1;
 344         }
 345
 346         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 347 }
 348
 349 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 350         sb_sasl_setup,          /* sbi_setup */
 351         sb_sasl_remove,         /* sbi_remove */
 352         sb_sasl_ctrl,           /* sbi_ctrl */
 353         sb_sasl_read,           /* sbi_read */
 354         sb_sasl_write,          /* sbi_write */
 355         NULL                    /* sbi_close */
 356 };
 357
 358 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 359 {
 360 #ifdef NEW_LOGGING
 361         LDAP_LOG (( "cyrus", LDAP_LEVEL_ENTRY, "ldap_pvt_sasl_install\n" ));
 362 #else
 363         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 364                 0, 0, 0 );
 365 #endif
 366
 367         /* don't install the stuff unless security has been negotiated */
 368
 369         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 370                         &ldap_pvt_sockbuf_io_sasl ) )
 371         {
 372 #ifdef LDAP_DEBUG
 373                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 374                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 375 #endif
 376                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 377                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 378         }
 379
 380         return LDAP_SUCCESS;
 381 }
 382
 383 static int
 384 sasl_err2ldap( int saslerr )
 385 {
 386         int rc;
 387
 388         switch (saslerr) {
 389                 case SASL_CONTINUE:
 390                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 391                         break;
 392                 case SASL_INTERACT:
 393                         rc = LDAP_LOCAL_ERROR;
 394                         break;
 395                 case SASL_OK:
 396                         rc = LDAP_SUCCESS;
 397                         break;
 398                 case SASL_FAIL:
 399                         rc = LDAP_LOCAL_ERROR;
 400                         break;
 401                 case SASL_NOMEM:
 402                         rc = LDAP_NO_MEMORY;
 403                         break;
 404                 case SASL_NOMECH:
 405                         rc = LDAP_AUTH_UNKNOWN;
 406                         break;
 407                 case SASL_BADAUTH:
 408                         rc = LDAP_AUTH_UNKNOWN;
 409                         break;
 410                 case SASL_NOAUTHZ:
 411                         rc = LDAP_PARAM_ERROR;
 412                         break;
 413                 case SASL_TOOWEAK:
 414                 case SASL_ENCRYPT:
 415                         rc = LDAP_AUTH_UNKNOWN;
 416                         break;
 417                 default:
 418                         rc = LDAP_LOCAL_ERROR;
 419                         break;
 420         }
 421
 422         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 423         return rc;
 424 }
 425
 426 int
 427 ldap_int_sasl_open(
 428         LDAP *ld,
 429         LDAPConn *lc,
 430         const char * host,
 431         ber_len_t ssf )
 432 {
 433         int rc;
 434         sasl_conn_t *ctx;
 435
 436         sasl_callback_t *session_callbacks =
 437                 LDAP_CALLOC( 2, sizeof( sasl_callback_t ) );
 438
 439         if( session_callbacks == NULL ) return LDAP_NO_MEMORY;
 440
 441         session_callbacks[0].id = SASL_CB_USER;
 442         session_callbacks[0].proc = NULL;
 443         session_callbacks[0].context = ld;
 444
 445         session_callbacks[1].id = SASL_CB_LIST_END;
 446         session_callbacks[1].proc = NULL;
 447         session_callbacks[1].context = NULL;
 448
 449         assert( lc->lconn_sasl_ctx == NULL );
 450
 451         if ( host == NULL ) {
 452                 ld->ld_errno = LDAP_LOCAL_ERROR;
 453                 return ld->ld_errno;
 454         }
 455
 456 #if SASL_VERSION_MAJOR >= 2
 457         rc = sasl_client_new( "ldap", host, NULL, NULL,
 458                 session_callbacks, 0, &ctx );
 459 #else
 460         rc = sasl_client_new( "ldap", host, session_callbacks,
 461                 SASL_SECURITY_LAYER, &ctx );
 462 #endif
 463
 464         if ( rc != SASL_OK ) {
 465                 ld->ld_errno = sasl_err2ldap( rc );
 466                 return ld->ld_errno;
 467         }
 468
 469 #ifdef NEW_LOGGING
 470         LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 471                 "ldap_int_sasl_open: host=%s\n", host ));
 472 #else
 473         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 474                 host, 0, 0 );
 475 #endif
 476
 477         lc->lconn_sasl_ctx = ctx;
 478
 479         if( ssf ) {
 480 #if SASL_VERSION_MAJOR >= 2
 481                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 482                         (void *) &ssf );
 483 #else
 484                 sasl_external_properties_t extprops;
 485                 memset(&extprops, 0L, sizeof(extprops));
 486                 extprops.ssf = ssf;
 487
 488                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 489                         (void *) &extprops );
 490 #endif
 491 #ifdef NEW_LOGGING
 492                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 493                         "ldap_int_sasl_open: ssf=%ld\n", (long) ssf ));
 494 #else
 495                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 496                         (long) ssf, 0, 0 );
 497 #endif
 498         }
 499
 500         return LDAP_SUCCESS;
 501 }
 502
 503 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 504 {
 505         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 506
 507         if( ctx != NULL ) {
 508                 const void *callbacks;
 509                 sasl_getprop( ctx, SASL_CALLBACK, &callbacks );
 510                 sasl_dispose( &ctx );
 511                 lc->lconn_sasl_ctx = NULL;
 512                 LDAP_FREE( (void *)callbacks );
 513         }
 514
 515         return LDAP_SUCCESS;
 516 }
 517
 518 int
 519 ldap_int_sasl_bind(
 520         LDAP                    *ld,
 521         const char              *dn,
 522         const char              *mechs,
 523         LDAPControl             **sctrls,
 524         LDAPControl             **cctrls,
 525         unsigned                flags,
 526         LDAP_SASL_INTERACT_PROC *interact,
 527         void * defaults )
 528 {
 529         char *data;
 530         const char *mech = NULL;
 531         const char *pmech = NULL;
 532         int                     saslrc, rc;
 533         sasl_ssf_t              *ssf = NULL;
 534         sasl_conn_t     *ctx;
 535         sasl_interact_t *prompts = NULL;
 536         unsigned credlen;
 537         struct berval ccred;
 538         ber_socket_t            sd;
 539
 540 #ifdef NEW_LOGGING
 541         LDAP_LOG (( "cyrus", LDAP_LEVEL_ARGS,
 542                         "ldap_int_sasl_bind: %s\n", mechs ? mechs : "<null>" ));
 543 #else
 544         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 545                 mechs ? mechs : "<null>", 0, 0 );
 546 #endif
 547
 548         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 549         if (ld->ld_version < LDAP_VERSION3) {
 550                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 551                 return ld->ld_errno;
 552         }
 553
 554         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 555
 556         if ( sd == AC_SOCKET_INVALID ) {
 557                 /* not connected yet */
 558                 int rc;
 559
 560                 rc = ldap_open_defconn( ld );
 561                 if( rc < 0 ) return ld->ld_errno;
 562
 563                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 564
 565                 if( sd == AC_SOCKET_INVALID ) {
 566                         ld->ld_errno = LDAP_LOCAL_ERROR;
 567                         return ld->ld_errno;
 568                 }
 569         }
 570
 571         ctx = ld->ld_defconn->lconn_sasl_ctx;
 572
 573         if( ctx == NULL ) {
 574                 ld->ld_errno = LDAP_LOCAL_ERROR;
 575                 return ld->ld_errno;
 576         }
 577
 578         /* (re)set security properties */
 579         sasl_setprop( ctx, SASL_SEC_PROPS,
 580                 &ld->ld_options.ldo_sasl_secprops );
 581
 582         ccred.bv_val = NULL;
 583         ccred.bv_len = 0;
 584
 585         do {
 586                 saslrc = sasl_client_start( ctx,
 587                         mechs,
 588 #if SASL_VERSION_MAJOR < 2
 589                         NULL,
 590 #endif
 591                         &prompts,
 592                         (SASL_CONST char **)&ccred.bv_val,
 593                         &credlen,
 594                         &mech );
 595
 596                 if( pmech == NULL && mech != NULL ) {
 597                         pmech = mech;
 598
 599                         if( flags != LDAP_SASL_QUIET ) {
 600                                 fprintf(stderr,
 601                                         "SASL/%s authentication started\n",
 602                                         pmech );
 603                         }
 604                 }
 605
 606 #if SASL_VERSION_MAJOR >= 2
 607                 /* XXX the application should free interact results. */
 608                 if ( prompts != NULL && prompts->result != NULL ) {
 609                         LDAP_FREE( (void *)prompts->result );
 610                         prompts->result = NULL;
 611                 }
 612 #endif
 613
 614                 if( saslrc == SASL_INTERACT ) {
 615                         int res;
 616                         if( !interact ) break;
 617                         res = (interact)( ld, flags, defaults, prompts );
 618                         if( res != LDAP_SUCCESS ) {
 619                                 break;
 620                         }
 621                 }
 622         } while ( saslrc == SASL_INTERACT );
 623
 624         ccred.bv_len = credlen;
 625
 626         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 627                 ld->ld_errno = sasl_err2ldap( saslrc );
 628 #if SASL_VERSION_MAJOR >= 2
 629                 ld->ld_error = (char *)sasl_errdetail( ctx );
 630 #endif
 631                 return ld->ld_errno;
 632         }
 633
 634         do {
 635                 struct berval *scred;
 636                 unsigned credlen;
 637
 638                 scred = NULL;
 639
 640                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 641
 642                 if ( ccred.bv_val != NULL ) {
 643 #if SASL_VERSION_MAJOR < 2
 644                         LDAP_FREE( ccred.bv_val );
 645 #endif
 646                         ccred.bv_val = NULL;
 647                 }
 648
 649                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 650                         if( scred && scred->bv_len ) {
 651                                 /* and server provided us with data? */
 652 #ifdef NEW_LOGGING
 653                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 654                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 655                                         rc, saslrc, scred->bv_len ));
 656 #else
 657                                 Debug( LDAP_DEBUG_TRACE,
 658                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 659                                         rc, saslrc, scred->bv_len );
 660 #endif
 661                                 ber_bvfree( scred );
 662                         }
 663                         return ld->ld_errno;
 664                 }
 665
 666                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 667                         /* we're done, no need to step */
 668                         if( scred && scred->bv_len ) {
 669                                 /* but server provided us with data! */
 670 #ifdef NEW_LOGGING
 671                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_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                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 681                         }
 682                         break;
 683                 }
 684
 685                 do {
 686                         saslrc = sasl_client_step( ctx,
 687                                 (scred == NULL) ? NULL : scred->bv_val,
 688                                 (scred == NULL) ? 0 : scred->bv_len,
 689                                 &prompts,
 690                                 (SASL_CONST char **)&ccred.bv_val,
 691                                 &credlen );
 692
 693 #ifdef NEW_LOGGING
 694                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 695                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc ));
 696 #else
 697                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 698                                 saslrc, 0, 0 );
 699 #endif
 700
 701 #if SASL_VERSION_MAJOR >= 2
 702                         /* XXX the application should free interact results. */
 703                         if ( prompts != NULL && prompts->result != NULL ) {
 704                                 LDAP_FREE( (void *)prompts->result );
 705                                 prompts->result = NULL;
 706                         }
 707 #endif
 708
 709                         if( saslrc == SASL_INTERACT ) {
 710                                 int res;
 711                                 if( !interact ) break;
 712                                 res = (interact)( ld, flags, defaults, prompts );
 713                                 if( res != LDAP_SUCCESS ) {
 714                                         break;
 715                                 }
 716                         }
 717                 } while ( saslrc == SASL_INTERACT );
 718
 719                 ccred.bv_len = credlen;
 720                 ber_bvfree( scred );
 721
 722                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 723                         ld->ld_errno = sasl_err2ldap( saslrc );
 724 #if SASL_VERSION_MAJOR >= 2
 725                         ld->ld_error = (char *)sasl_errdetail( ctx );
 726 #endif
 727                         return ld->ld_errno;
 728                 }
 729         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 730
 731         if ( rc != LDAP_SUCCESS ) {
 732                 return rc;
 733         }
 734
 735         if ( saslrc != SASL_OK ) {
 736 #if SASL_VERSION_MAJOR >= 2
 737                 ld->ld_error = (char *)sasl_errdetail( ctx );
 738 #endif
 739                 return ld->ld_errno = sasl_err2ldap( saslrc );
 740         }
 741
 742         if( flags != LDAP_SASL_QUIET ) {
 743                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 744                 if( saslrc == SASL_OK && data && *data ) {
 745                         fprintf( stderr, "SASL username: %s\n", data );
 746                 }
 747
 748 #if SASL_VERSION_MAJOR >= 2
 749                 saslrc = sasl_getprop( ctx, SASL_DEFUSERREALM, (SASL_CONST void **) &data );
 750 #else
 751                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 752 #endif
 753                 if( saslrc == SASL_OK && data && *data ) {
 754                         fprintf( stderr, "SASL realm: %s\n", data );
 755                 }
 756         }
 757
 758         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 759         if( saslrc == SASL_OK ) {
 760                 if( flags != LDAP_SASL_QUIET ) {
 761                         fprintf( stderr, "SASL SSF: %lu\n",
 762                                 (unsigned long) *ssf );
 763                 }
 764
 765                 if( ssf && *ssf ) {
 766                         if( flags != LDAP_SASL_QUIET ) {
 767                                 fprintf( stderr, "SASL installing layers\n" );
 768                         }
 769                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 770                 }
 771         }
 772
 773         return rc;
 774 }
 775
 776 int
 777 ldap_int_sasl_external(
 778         LDAP *ld,
 779         LDAPConn *conn,
 780         const char * authid,
 781         ber_len_t ssf )
 782 {
 783         int sc;
 784         sasl_conn_t *ctx;
 785 #if SASL_VERSION_MAJOR < 2
 786         sasl_external_properties_t extprops;
 787 #endif
 788
 789         ctx = conn->lconn_sasl_ctx;
 790
 791         if ( ctx == NULL ) {
 792                 return LDAP_LOCAL_ERROR;
 793         }
 794
 795 #if SASL_VERSION_MAJOR >= 2
 796         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 797         if ( sc == SASL_OK )
 798                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 799 #else
 800         memset( &extprops, '\0', sizeof(extprops) );
 801         extprops.ssf = ssf;
 802         extprops.auth_id = (char *) authid;
 803
 804         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 805                 (void *) &extprops );
 806 #endif
 807
 808         if ( sc != SASL_OK ) {
 809                 return LDAP_LOCAL_ERROR;
 810         }
 811
 812         return LDAP_SUCCESS;
 813 }
 814
 815
 816 int ldap_pvt_sasl_secprops(
 817         const char *in,
 818         sasl_security_properties_t *secprops )
 819 {
 820         int i;
 821         char **props = ldap_str2charray( in, "," );
 822         unsigned sflags = 0;
 823         int got_sflags = 0;
 824         sasl_ssf_t max_ssf = 0;
 825         int got_max_ssf = 0;
 826         sasl_ssf_t min_ssf = 0;
 827         int got_min_ssf = 0;
 828         unsigned maxbufsize = 0;
 829         int got_maxbufsize = 0;
 830
 831         if( props == NULL || secprops == NULL ) {
 832                 return LDAP_PARAM_ERROR;
 833         }
 834
 835         for( i=0; props[i]; i++ ) {
 836                 if( !strcasecmp(props[i], "none") ) {
 837                         got_sflags++;
 838
 839                 } else if( !strcasecmp(props[i], "noplain") ) {
 840                         got_sflags++;
 841                         sflags |= SASL_SEC_NOPLAINTEXT;
 842
 843                 } else if( !strcasecmp(props[i], "noactive") ) {
 844                         got_sflags++;
 845                         sflags |= SASL_SEC_NOACTIVE;
 846
 847                 } else if( !strcasecmp(props[i], "nodict") ) {
 848                         got_sflags++;
 849                         sflags |= SASL_SEC_NODICTIONARY;
 850
 851                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 852                         got_sflags++;
 853                         sflags |= SASL_SEC_FORWARD_SECRECY;
 854
 855                 } else if( !strcasecmp(props[i], "noanonymous")) {
 856                         got_sflags++;
 857                         sflags |= SASL_SEC_NOANONYMOUS;
 858
 859                 } else if( !strcasecmp(props[i], "passcred") ) {
 860                         got_sflags++;
 861                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 862
 863                 } else if( !strncasecmp(props[i],
 864                         "minssf=", sizeof("minssf")) )
 865                 {
 866                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 867                                 got_min_ssf++;
 868                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 869                         } else {
 870                                 return LDAP_NOT_SUPPORTED;
 871                         }
 872
 873                 } else if( !strncasecmp(props[i],
 874                         "maxssf=", sizeof("maxssf")) )
 875                 {
 876                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 877                                 got_max_ssf++;
 878                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 879                         } else {
 880                                 return LDAP_NOT_SUPPORTED;
 881                         }
 882
 883                 } else if( !strncasecmp(props[i],
 884                         "maxbufsize=", sizeof("maxbufsize")) )
 885                 {
 886                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 887                                 got_maxbufsize++;
 888                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 889                         } else {
 890                                 return LDAP_NOT_SUPPORTED;
 891                         }
 892
 893                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 894                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 895                         {
 896                                 /* bad maxbufsize */
 897                                 return LDAP_PARAM_ERROR;
 898                         }
 899
 900                 } else {
 901                         return LDAP_NOT_SUPPORTED;
 902                 }
 903         }
 904
 905         if(got_sflags) {
 906                 secprops->security_flags = sflags;
 907         }
 908         if(got_min_ssf) {
 909                 secprops->min_ssf = min_ssf;
 910         }
 911         if(got_max_ssf) {
 912                 secprops->max_ssf = max_ssf;
 913         }
 914         if(got_maxbufsize) {
 915                 secprops->maxbufsize = maxbufsize;
 916         }
 917
 918         ldap_charray_free( props );
 919         return LDAP_SUCCESS;
 920 }
 921
 922 int
 923 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 924 {
 925         int rc;
 926
 927         switch( option ) {
 928         case LDAP_OPT_X_SASL_SECPROPS:
 929                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 930                 if( rc == LDAP_SUCCESS ) return 0;
 931         }
 932
 933         return -1;
 934 }
 935
 936 int
 937 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 938 {
 939         if ( ld == NULL )
 940                 return -1;
 941
 942         switch ( option ) {
 943                 case LDAP_OPT_X_SASL_MECH: {
 944                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 945                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 946                 } break;
 947                 case LDAP_OPT_X_SASL_REALM: {
 948                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 949                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 950                 } break;
 951                 case LDAP_OPT_X_SASL_AUTHCID: {
 952                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 953                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 954                 } break;
 955                 case LDAP_OPT_X_SASL_AUTHZID: {
 956                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 957                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 958                 } break;
 959
 960                 case LDAP_OPT_X_SASL_SSF: {
 961                         int sc;
 962                         sasl_ssf_t      *ssf;
 963                         sasl_conn_t *ctx;
 964
 965                         if( ld->ld_defconn == NULL ) {
 966                                 return -1;
 967                         }
 968
 969                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 970
 971                         if ( ctx == NULL ) {
 972                                 return -1;
 973                         }
 974
 975                         sc = sasl_getprop( ctx, SASL_SSF,
 976                                 (SASL_CONST void **) &ssf );
 977
 978                         if ( sc != SASL_OK ) {
 979                                 return -1;
 980                         }
 981
 982                         *(ber_len_t *)arg = *ssf;
 983                 } break;
 984
 985                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 986                         /* this option is write only */
 987                         return -1;
 988
 989                 case LDAP_OPT_X_SASL_SSF_MIN:
 990                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 991                         break;
 992                 case LDAP_OPT_X_SASL_SSF_MAX:
 993                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 994                         break;
 995                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 996                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 997                         break;
 998
 999                 case LDAP_OPT_X_SASL_SECPROPS:
1000                         /* this option is write only */
1001                         return -1;
1002
1003                 default:
1004                         return -1;
1005         }
1006         return 0;
1007 }
1008
1009 int
1010 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1011 {
1012         if ( ld == NULL )
1013                 return -1;
1014
1015         switch ( option ) {
1016         case LDAP_OPT_X_SASL_SSF:
1017                 /* This option is read-only */
1018                 return -1;
1019
1020         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1021                 int sc;
1022 #if SASL_VERSION_MAJOR < 2
1023                 sasl_external_properties_t extprops;
1024 #endif
1025                 sasl_conn_t *ctx;
1026
1027                 if( ld->ld_defconn == NULL ) {
1028                         return -1;
1029                 }
1030
1031                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1032
1033                 if ( ctx == NULL ) {
1034                         return -1;
1035                 }
1036
1037 #if SASL_VERSION_MAJOR >= 2
1038                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1039 #else
1040                 memset(&extprops, 0L, sizeof(extprops));
1041
1042                 extprops.ssf = * (ber_len_t *) arg;
1043
1044                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1045                         (void *) &extprops );
1046 #endif
1047
1048                 if ( sc != SASL_OK ) {
1049                         return -1;
1050                 }
1051                 } break;
1052
1053         case LDAP_OPT_X_SASL_SSF_MIN:
1054                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1055                 break;
1056         case LDAP_OPT_X_SASL_SSF_MAX:
1057                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1058                 break;
1059         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1060                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1061                 break;
1062
1063         case LDAP_OPT_X_SASL_SECPROPS: {
1064                 int sc;
1065                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1066                         &ld->ld_options.ldo_sasl_secprops );
1067
1068                 return sc == LDAP_SUCCESS ? 0 : -1;
1069                 }
1070
1071         default:
1072                 return -1;
1073         }
1074         return 0;
1075 }
1076
1077 #ifdef LDAP_R_COMPILE
1078 void *ldap_pvt_sasl_mutex_new(void)
1079 {
1080         ldap_pvt_thread_mutex_t *mutex;
1081
1082         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1083                 sizeof(ldap_pvt_thread_mutex_t) );
1084
1085         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1086                 return mutex;
1087         }
1088         return NULL;
1089 }
1090
1091 int ldap_pvt_sasl_mutex_lock(void *mutex)
1092 {
1093         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1094                 ? SASL_FAIL : SASL_OK;
1095 }
1096
1097 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1098 {
1099         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1100                 ? SASL_FAIL : SASL_OK;
1101 }
1102
1103 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1104 {
1105         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1106         LDAP_FREE( mutex );
1107 }
1108 #endif
1109
1110 #else
1111 int ldap_int_sasl_init( void )
1112 { return LDAP_SUCCESS; }
1113
1114 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1115 { return LDAP_SUCCESS; }
1116
1117 int
1118 ldap_int_sasl_bind(
1119         LDAP                    *ld,
1120         const char              *dn,
1121         const char              *mechs,
1122         LDAPControl             **sctrls,
1123         LDAPControl             **cctrls,
1124         unsigned                flags,
1125         LDAP_SASL_INTERACT_PROC *interact,
1126         void * defaults )
1127 { return LDAP_NOT_SUPPORTED; }
1128
1129 int
1130 ldap_int_sasl_external(
1131         LDAP *ld,
1132         LDAPConn *conn,
1133         const char * authid,
1134         ber_len_t ssf )
1135 { return LDAP_SUCCESS; }
1136
1137 #endif /* HAVE_CYRUS_SASL */