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 #endif
 459         LDAP_FREE( session_callbacks );
 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                 sasl_dispose( &ctx );
 506                 lc->lconn_sasl_ctx = NULL;
 507         }
 508
 509         return LDAP_SUCCESS;
 510 }
 511
 512 int
 513 ldap_int_sasl_bind(
 514         LDAP                    *ld,
 515         const char              *dn,
 516         const char              *mechs,
 517         LDAPControl             **sctrls,
 518         LDAPControl             **cctrls,
 519         unsigned                flags,
 520         LDAP_SASL_INTERACT_PROC *interact,
 521         void * defaults )
 522 {
 523         char *data;
 524         const char *mech = NULL;
 525         const char *pmech = NULL;
 526         int                     saslrc, rc;
 527         sasl_ssf_t              *ssf = NULL;
 528         sasl_conn_t     *ctx;
 529         sasl_interact_t *prompts = NULL;
 530         unsigned credlen;
 531         struct berval ccred;
 532         ber_socket_t            sd;
 533
 534 #ifdef NEW_LOGGING
 535         LDAP_LOG (( "cyrus", LDAP_LEVEL_ARGS,
 536                         "ldap_int_sasl_bind: %s\n", mechs ? mechs : "<null>" ));
 537 #else
 538         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 539                 mechs ? mechs : "<null>", 0, 0 );
 540 #endif
 541
 542         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 543         if (ld->ld_version < LDAP_VERSION3) {
 544                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 545                 return ld->ld_errno;
 546         }
 547
 548         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 549
 550         if ( sd == AC_SOCKET_INVALID ) {
 551                 /* not connected yet */
 552                 int rc;
 553
 554                 rc = ldap_open_defconn( ld );
 555                 if( rc < 0 ) return ld->ld_errno;
 556
 557                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 558
 559                 if( sd == AC_SOCKET_INVALID ) {
 560                         ld->ld_errno = LDAP_LOCAL_ERROR;
 561                         return ld->ld_errno;
 562                 }
 563         }
 564
 565         ctx = ld->ld_defconn->lconn_sasl_ctx;
 566
 567         if( ctx == NULL ) {
 568                 ld->ld_errno = LDAP_LOCAL_ERROR;
 569                 return ld->ld_errno;
 570         }
 571
 572         /* (re)set security properties */
 573         sasl_setprop( ctx, SASL_SEC_PROPS,
 574                 &ld->ld_options.ldo_sasl_secprops );
 575
 576         ccred.bv_val = NULL;
 577         ccred.bv_len = 0;
 578
 579         do {
 580                 saslrc = sasl_client_start( ctx,
 581                         mechs,
 582 #if SASL_VERSION_MAJOR < 2
 583                         NULL,
 584 #endif
 585                         &prompts,
 586                         (SASL_CONST char **)&ccred.bv_val,
 587                         &credlen,
 588                         &mech );
 589
 590                 if( pmech == NULL && mech != NULL ) {
 591                         pmech = mech;
 592
 593                         if( flags != LDAP_SASL_QUIET ) {
 594                                 fprintf(stderr,
 595                                         "SASL/%s authentication started\n",
 596                                         pmech );
 597                         }
 598                 }
 599
 600 #if SASL_VERSION_MAJOR >= 2
 601                 /* XXX the application should free interact results. */
 602                 if ( prompts != NULL && prompts->result != NULL ) {
 603                         LDAP_FREE( (void *)prompts->result );
 604                         prompts->result = NULL;
 605                 }
 606 #endif
 607
 608                 if( saslrc == SASL_INTERACT ) {
 609                         int res;
 610                         if( !interact ) break;
 611                         res = (interact)( ld, flags, defaults, prompts );
 612                         if( res != LDAP_SUCCESS ) {
 613                                 break;
 614                         }
 615                 }
 616         } while ( saslrc == SASL_INTERACT );
 617
 618         ccred.bv_len = credlen;
 619
 620         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 621                 ld->ld_errno = sasl_err2ldap( saslrc );
 622                 return ld->ld_errno;
 623         }
 624
 625         do {
 626                 struct berval *scred;
 627                 unsigned credlen;
 628
 629                 scred = NULL;
 630
 631                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 632
 633                 if ( ccred.bv_val != NULL ) {
 634 #if SASL_VERSION_MAJOR < 2
 635                         LDAP_FREE( ccred.bv_val );
 636 #endif
 637                         ccred.bv_val = NULL;
 638                 }
 639
 640                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 641                         if( scred && scred->bv_len ) {
 642                                 /* and server provided us with data? */
 643 #ifdef NEW_LOGGING
 644                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 645                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 646                                         rc, saslrc, scred->bv_len ));
 647 #else
 648                                 Debug( LDAP_DEBUG_TRACE,
 649                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 650                                         rc, saslrc, scred->bv_len );
 651 #endif
 652                                 ber_bvfree( scred );
 653                         }
 654                         return ld->ld_errno;
 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 (( "cyrus", LDAP_LEVEL_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                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 672                         }
 673                         break;
 674                 }
 675
 676                 do {
 677                         saslrc = sasl_client_step( ctx,
 678                                 (scred == NULL) ? NULL : scred->bv_val,
 679                                 (scred == NULL) ? 0 : scred->bv_len,
 680                                 &prompts,
 681                                 (SASL_CONST char **)&ccred.bv_val,
 682                                 &credlen );
 683
 684 #ifdef NEW_LOGGING
 685                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 686                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc ));
 687 #else
 688                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 689                                 saslrc, 0, 0 );
 690 #endif
 691
 692 #if SASL_VERSION_MAJOR >= 2
 693                         /* XXX the application should free interact results. */
 694                         if ( prompts != NULL && prompts->result != NULL ) {
 695                                 LDAP_FREE( (void *)prompts->result );
 696                                 prompts->result = NULL;
 697                         }
 698 #endif
 699
 700                         if( saslrc == SASL_INTERACT ) {
 701                                 int res;
 702                                 if( !interact ) break;
 703                                 res = (interact)( ld, flags, defaults, prompts );
 704                                 if( res != LDAP_SUCCESS ) {
 705                                         break;
 706                                 }
 707                         }
 708                 } while ( saslrc == SASL_INTERACT );
 709
 710                 ccred.bv_len = credlen;
 711                 ber_bvfree( scred );
 712
 713                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 714                         ld->ld_errno = sasl_err2ldap( saslrc );
 715                         return ld->ld_errno;
 716                 }
 717         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 718
 719         if ( rc != LDAP_SUCCESS ) {
 720                 return rc;
 721         }
 722
 723         if ( saslrc != SASL_OK ) {
 724                 return ld->ld_errno = sasl_err2ldap( saslrc );
 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         return rc;
 759 }
 760
 761 int
 762 ldap_int_sasl_external(
 763         LDAP *ld,
 764         LDAPConn *conn,
 765         const char * authid,
 766         ber_len_t ssf )
 767 {
 768         int sc;
 769         sasl_conn_t *ctx;
 770 #if SASL_VERSION_MAJOR < 2
 771         sasl_external_properties_t extprops;
 772 #endif
 773
 774         ctx = conn->lconn_sasl_ctx;
 775
 776         if ( ctx == NULL ) {
 777                 return LDAP_LOCAL_ERROR;
 778         }
 779
 780 #if SASL_VERSION_MAJOR >= 2
 781         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 782 #else
 783         memset( &extprops, '\0', sizeof(extprops) );
 784         extprops.ssf = ssf;
 785         extprops.auth_id = (char *) authid;
 786
 787         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 788                 (void *) &extprops );
 789 #endif
 790
 791         if ( sc != SASL_OK ) {
 792                 return LDAP_LOCAL_ERROR;
 793         }
 794
 795         return LDAP_SUCCESS;
 796 }
 797
 798
 799 int ldap_pvt_sasl_secprops(
 800         const char *in,
 801         sasl_security_properties_t *secprops )
 802 {
 803         int i;
 804         char **props = ldap_str2charray( in, "," );
 805         unsigned sflags = 0;
 806         int got_sflags = 0;
 807         sasl_ssf_t max_ssf = 0;
 808         int got_max_ssf = 0;
 809         sasl_ssf_t min_ssf = 0;
 810         int got_min_ssf = 0;
 811         unsigned maxbufsize = 0;
 812         int got_maxbufsize = 0;
 813
 814         if( props == NULL || secprops == NULL ) {
 815                 return LDAP_PARAM_ERROR;
 816         }
 817
 818         for( i=0; props[i]; i++ ) {
 819                 if( !strcasecmp(props[i], "none") ) {
 820                         got_sflags++;
 821
 822                 } else if( !strcasecmp(props[i], "noplain") ) {
 823                         got_sflags++;
 824                         sflags |= SASL_SEC_NOPLAINTEXT;
 825
 826                 } else if( !strcasecmp(props[i], "noactive") ) {
 827                         got_sflags++;
 828                         sflags |= SASL_SEC_NOACTIVE;
 829
 830                 } else if( !strcasecmp(props[i], "nodict") ) {
 831                         got_sflags++;
 832                         sflags |= SASL_SEC_NODICTIONARY;
 833
 834                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 835                         got_sflags++;
 836                         sflags |= SASL_SEC_FORWARD_SECRECY;
 837
 838                 } else if( !strcasecmp(props[i], "noanonymous")) {
 839                         got_sflags++;
 840                         sflags |= SASL_SEC_NOANONYMOUS;
 841
 842                 } else if( !strcasecmp(props[i], "passcred") ) {
 843                         got_sflags++;
 844                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 845
 846                 } else if( !strncasecmp(props[i],
 847                         "minssf=", sizeof("minssf")) )
 848                 {
 849                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 850                                 got_min_ssf++;
 851                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 852                         } else {
 853                                 return LDAP_NOT_SUPPORTED;
 854                         }
 855
 856                 } else if( !strncasecmp(props[i],
 857                         "maxssf=", sizeof("maxssf")) )
 858                 {
 859                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 860                                 got_max_ssf++;
 861                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 862                         } else {
 863                                 return LDAP_NOT_SUPPORTED;
 864                         }
 865
 866                 } else if( !strncasecmp(props[i],
 867                         "maxbufsize=", sizeof("maxbufsize")) )
 868                 {
 869                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 870                                 got_maxbufsize++;
 871                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 872                         } else {
 873                                 return LDAP_NOT_SUPPORTED;
 874                         }
 875
 876                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 877                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 878                         {
 879                                 /* bad maxbufsize */
 880                                 return LDAP_PARAM_ERROR;
 881                         }
 882
 883                 } else {
 884                         return LDAP_NOT_SUPPORTED;
 885                 }
 886         }
 887
 888         if(got_sflags) {
 889                 secprops->security_flags = sflags;
 890         }
 891         if(got_min_ssf) {
 892                 secprops->min_ssf = min_ssf;
 893         }
 894         if(got_max_ssf) {
 895                 secprops->max_ssf = max_ssf;
 896         }
 897         if(got_maxbufsize) {
 898                 secprops->maxbufsize = maxbufsize;
 899         }
 900
 901         ldap_charray_free( props );
 902         return LDAP_SUCCESS;
 903 }
 904
 905 int
 906 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 907 {
 908         int rc;
 909
 910         switch( option ) {
 911         case LDAP_OPT_X_SASL_SECPROPS:
 912                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 913                 if( rc == LDAP_SUCCESS ) return 0;
 914         }
 915
 916         return -1;
 917 }
 918
 919 int
 920 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 921 {
 922         if ( ld == NULL )
 923                 return -1;
 924
 925         switch ( option ) {
 926                 case LDAP_OPT_X_SASL_MECH: {
 927                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 928                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 929                 } break;
 930                 case LDAP_OPT_X_SASL_REALM: {
 931                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 932                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 933                 } break;
 934                 case LDAP_OPT_X_SASL_AUTHCID: {
 935                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 936                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 937                 } break;
 938                 case LDAP_OPT_X_SASL_AUTHZID: {
 939                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 940                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 941                 } break;
 942
 943                 case LDAP_OPT_X_SASL_SSF: {
 944                         int sc;
 945                         sasl_ssf_t      *ssf;
 946                         sasl_conn_t *ctx;
 947
 948                         if( ld->ld_defconn == NULL ) {
 949                                 return -1;
 950                         }
 951
 952                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 953
 954                         if ( ctx == NULL ) {
 955                                 return -1;
 956                         }
 957
 958                         sc = sasl_getprop( ctx, SASL_SSF,
 959                                 (SASL_CONST void **) &ssf );
 960
 961                         if ( sc != SASL_OK ) {
 962                                 return -1;
 963                         }
 964
 965                         *(ber_len_t *)arg = *ssf;
 966                 } break;
 967
 968                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 969                         /* this option is write only */
 970                         return -1;
 971
 972                 case LDAP_OPT_X_SASL_SSF_MIN:
 973                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 974                         break;
 975                 case LDAP_OPT_X_SASL_SSF_MAX:
 976                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 977                         break;
 978                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 979                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 980                         break;
 981
 982                 case LDAP_OPT_X_SASL_SECPROPS:
 983                         /* this option is write only */
 984                         return -1;
 985
 986                 default:
 987                         return -1;
 988         }
 989         return 0;
 990 }
 991
 992 int
 993 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 994 {
 995         if ( ld == NULL )
 996                 return -1;
 997
 998         switch ( option ) {
 999         case LDAP_OPT_X_SASL_SSF:
1000                 /* This option is read-only */
1001                 return -1;
1002
1003         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1004                 int sc;
1005 #if SASL_VERSION_MAJOR < 2
1006                 sasl_external_properties_t extprops;
1007 #endif
1008                 sasl_conn_t *ctx;
1009
1010                 if( ld->ld_defconn == NULL ) {
1011                         return -1;
1012                 }
1013
1014                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1015
1016                 if ( ctx == NULL ) {
1017                         return -1;
1018                 }
1019
1020 #if SASL_VERSION_MAJOR >= 2
1021                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1022 #else
1023                 memset(&extprops, 0L, sizeof(extprops));
1024
1025                 extprops.ssf = * (ber_len_t *) arg;
1026
1027                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1028                         (void *) &extprops );
1029 #endif
1030
1031                 if ( sc != SASL_OK ) {
1032                         return -1;
1033                 }
1034                 } break;
1035
1036         case LDAP_OPT_X_SASL_SSF_MIN:
1037                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1038                 break;
1039         case LDAP_OPT_X_SASL_SSF_MAX:
1040                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1041                 break;
1042         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1043                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1044                 break;
1045
1046         case LDAP_OPT_X_SASL_SECPROPS: {
1047                 int sc;
1048                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1049                         &ld->ld_options.ldo_sasl_secprops );
1050
1051                 return sc == LDAP_SUCCESS ? 0 : -1;
1052                 }
1053
1054         default:
1055                 return -1;
1056         }
1057         return 0;
1058 }
1059
1060 #ifdef LDAP_R_COMPILE
1061 void *ldap_pvt_sasl_mutex_new(void)
1062 {
1063         ldap_pvt_thread_mutex_t *mutex;
1064
1065         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1066                 sizeof(ldap_pvt_thread_mutex_t) );
1067
1068         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1069                 return mutex;
1070         }
1071         return NULL;
1072 }
1073
1074 int ldap_pvt_sasl_mutex_lock(void *mutex)
1075 {
1076         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1077                 ? SASL_FAIL : SASL_OK;
1078 }
1079
1080 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1081 {
1082         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1083                 ? SASL_FAIL : SASL_OK;
1084 }
1085
1086 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1087 {
1088         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1089         LDAP_FREE( mutex );
1090 }
1091 #endif
1092
1093 #else
1094 int ldap_int_sasl_init( void )
1095 { return LDAP_SUCCESS; }
1096
1097 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1098 { return LDAP_SUCCESS; }
1099
1100 int
1101 ldap_int_sasl_bind(
1102         LDAP                    *ld,
1103         const char              *dn,
1104         const char              *mechs,
1105         LDAPControl             **sctrls,
1106         LDAPControl             **cctrls,
1107         unsigned                flags,
1108         LDAP_SASL_INTERACT_PROC *interact,
1109         void * defaults )
1110 { return LDAP_NOT_SUPPORTED; }
1111
1112 int
1113 ldap_int_sasl_external(
1114         LDAP *ld,
1115         LDAPConn *conn,
1116         const char * authid,
1117         ber_len_t ssf )
1118 { return LDAP_SUCCESS; }
1119
1120 #endif /* HAVE_CYRUS_SASL */