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_HEADER_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         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 357                 0, 0, 0 );
 358
 359         /* don't install the stuff unless security has been negotiated */
 360
 361         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 362                         &ldap_pvt_sockbuf_io_sasl ) )
 363         {
 364 #ifdef LDAP_DEBUG
 365                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 366                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 367 #endif
 368                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 369                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 370         }
 371
 372         return LDAP_SUCCESS;
 373 }
 374
 375 static int
 376 sasl_err2ldap( int saslerr )
 377 {
 378         int rc;
 379
 380         switch (saslerr) {
 381                 case SASL_CONTINUE:
 382                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 383                         break;
 384                 case SASL_INTERACT:
 385                         rc = LDAP_LOCAL_ERROR;
 386                         break;
 387                 case SASL_OK:
 388                         rc = LDAP_SUCCESS;
 389                         break;
 390                 case SASL_FAIL:
 391                         rc = LDAP_LOCAL_ERROR;
 392                         break;
 393                 case SASL_NOMEM:
 394                         rc = LDAP_NO_MEMORY;
 395                         break;
 396                 case SASL_NOMECH:
 397                         rc = LDAP_AUTH_UNKNOWN;
 398                         break;
 399                 case SASL_BADAUTH:
 400                         rc = LDAP_AUTH_UNKNOWN;
 401                         break;
 402                 case SASL_NOAUTHZ:
 403                         rc = LDAP_PARAM_ERROR;
 404                         break;
 405                 case SASL_TOOWEAK:
 406                 case SASL_ENCRYPT:
 407                         rc = LDAP_AUTH_UNKNOWN;
 408                         break;
 409                 default:
 410                         rc = LDAP_LOCAL_ERROR;
 411                         break;
 412         }
 413
 414         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 415         return rc;
 416 }
 417
 418 int
 419 ldap_int_sasl_open(
 420         LDAP *ld,
 421         LDAPConn *lc,
 422         const char * host,
 423         ber_len_t ssf )
 424 {
 425         int rc;
 426         sasl_conn_t *ctx;
 427
 428         sasl_callback_t *session_callbacks =
 429                 LDAP_CALLOC( 2, sizeof( sasl_callback_t ) );
 430
 431         if( session_callbacks == NULL ) return LDAP_NO_MEMORY;
 432
 433         session_callbacks[0].id = SASL_CB_USER;
 434         session_callbacks[0].proc = NULL;
 435         session_callbacks[0].context = ld;
 436
 437         session_callbacks[1].id = SASL_CB_LIST_END;
 438         session_callbacks[1].proc = NULL;
 439         session_callbacks[1].context = NULL;
 440
 441         assert( lc->lconn_sasl_ctx == NULL );
 442
 443         if ( host == NULL ) {
 444                 ld->ld_errno = LDAP_LOCAL_ERROR;
 445                 return ld->ld_errno;
 446         }
 447
 448 #if SASL_VERSION_MAJOR >= 2
 449         rc = sasl_client_new( "ldap", host, NULL, NULL,
 450                 session_callbacks, 0, &ctx );
 451 #else
 452         rc = sasl_client_new( "ldap", host, session_callbacks,
 453                 SASL_SECURITY_LAYER, &ctx );
 454 #endif
 455         LDAP_FREE( session_callbacks );
 456
 457         if ( rc != SASL_OK ) {
 458                 ld->ld_errno = sasl_err2ldap( rc );
 459                 return ld->ld_errno;
 460         }
 461
 462         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 463                 host, 0, 0 );
 464
 465         lc->lconn_sasl_ctx = ctx;
 466
 467         if( ssf ) {
 468 #if SASL_VERSION_MAJOR >= 2
 469                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 470                         (void *) &ssf );
 471 #else
 472                 sasl_external_properties_t extprops;
 473                 memset(&extprops, 0L, sizeof(extprops));
 474                 extprops.ssf = ssf;
 475
 476                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 477                         (void *) &extprops );
 478 #endif
 479                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 480                         (long) ssf, 0, 0 );
 481         }
 482
 483         return LDAP_SUCCESS;
 484 }
 485
 486 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 487 {
 488         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 489
 490         if( ctx != NULL ) {
 491                 sasl_dispose( &ctx );
 492                 lc->lconn_sasl_ctx = NULL;
 493         }
 494
 495         return LDAP_SUCCESS;
 496 }
 497
 498 int
 499 ldap_int_sasl_bind(
 500         LDAP                    *ld,
 501         const char              *dn,
 502         const char              *mechs,
 503         LDAPControl             **sctrls,
 504         LDAPControl             **cctrls,
 505         unsigned                flags,
 506         LDAP_SASL_INTERACT_PROC *interact,
 507         void * defaults )
 508 {
 509         char *data;
 510         const char *mech = NULL;
 511         const char *pmech = NULL;
 512         int                     saslrc, rc;
 513         sasl_ssf_t              *ssf = NULL;
 514         sasl_conn_t     *ctx;
 515         sasl_interact_t *prompts = NULL;
 516         unsigned credlen;
 517         struct berval ccred;
 518         ber_socket_t            sd;
 519
 520         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 521                 mechs ? mechs : "<null>", 0, 0 );
 522
 523         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 524         if (ld->ld_version < LDAP_VERSION3) {
 525                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 526                 return ld->ld_errno;
 527         }
 528
 529         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 530
 531         if ( sd == AC_SOCKET_INVALID ) {
 532                 /* not connected yet */
 533                 int rc;
 534
 535                 rc = ldap_open_defconn( ld );
 536                 if( rc < 0 ) return ld->ld_errno;
 537
 538                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 539
 540                 if( sd == AC_SOCKET_INVALID ) {
 541                         ld->ld_errno = LDAP_LOCAL_ERROR;
 542                         return ld->ld_errno;
 543                 }
 544         }
 545
 546         ctx = ld->ld_defconn->lconn_sasl_ctx;
 547
 548         if( ctx == NULL ) {
 549                 ld->ld_errno = LDAP_LOCAL_ERROR;
 550                 return ld->ld_errno;
 551         }
 552
 553         /* (re)set security properties */
 554         sasl_setprop( ctx, SASL_SEC_PROPS,
 555                 &ld->ld_options.ldo_sasl_secprops );
 556
 557         ccred.bv_val = NULL;
 558         ccred.bv_len = 0;
 559
 560         do {
 561                 saslrc = sasl_client_start( ctx,
 562                         mechs,
 563 #if SASL_VERSION_MAJOR < 2
 564                         NULL,
 565 #endif
 566                         &prompts,
 567                         (SASL_CONST char **)&ccred.bv_val,
 568                         &credlen,
 569                         &mech );
 570
 571                 if( pmech == NULL && mech != NULL ) {
 572                         pmech = mech;
 573
 574                         if( flags != LDAP_SASL_QUIET ) {
 575                                 fprintf(stderr,
 576                                         "SASL/%s authentication started\n",
 577                                         pmech );
 578                         }
 579                 }
 580
 581 #if SASL_VERSION_MAJOR >= 2
 582                 /* XXX the application should free interact results. */
 583                 if ( prompts != NULL && prompts->result != NULL ) {
 584                         LDAP_FREE( (void *)prompts->result );
 585                         prompts->result = NULL;
 586                 }
 587 #endif
 588
 589                 if( saslrc == SASL_INTERACT ) {
 590                         int res;
 591                         if( !interact ) break;
 592                         res = (interact)( ld, flags, defaults, prompts );
 593                         if( res != LDAP_SUCCESS ) {
 594                                 break;
 595                         }
 596                 }
 597         } while ( saslrc == SASL_INTERACT );
 598
 599         ccred.bv_len = credlen;
 600
 601         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 602                 ld->ld_errno = sasl_err2ldap( saslrc );
 603                 return ld->ld_errno;
 604         }
 605
 606         do {
 607                 struct berval *scred;
 608                 unsigned credlen;
 609
 610                 scred = NULL;
 611
 612                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 613
 614                 if ( ccred.bv_val != NULL ) {
 615 #if SASL_VERSION_MAJOR < 2
 616                         LDAP_FREE( ccred.bv_val );
 617 #endif
 618                         ccred.bv_val = NULL;
 619                 }
 620
 621                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 622                         if( scred && scred->bv_len ) {
 623                                 /* and server provided us with data? */
 624                                 Debug( LDAP_DEBUG_TRACE,
 625                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 626                                         rc, saslrc, scred->bv_len );
 627                                 ber_bvfree( scred );
 628                         }
 629                         return ld->ld_errno;
 630                 }
 631
 632                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 633                         /* we're done, no need to step */
 634                         if( scred && scred->bv_len ) {
 635                                 /* but server provided us with data! */
 636                                 Debug( LDAP_DEBUG_TRACE,
 637                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 638                                         rc, saslrc, scred->bv_len );
 639                                 ber_bvfree( scred );
 640                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 641                         }
 642                         break;
 643                 }
 644
 645                 do {
 646                         saslrc = sasl_client_step( ctx,
 647                                 (scred == NULL) ? NULL : scred->bv_val,
 648                                 (scred == NULL) ? 0 : scred->bv_len,
 649                                 &prompts,
 650                                 (SASL_CONST char **)&ccred.bv_val,
 651                                 &credlen );
 652
 653                         Debug( LDAP_DEBUG_TRACE, "sasl_client_start: %d\n",
 654                                 saslrc, 0, 0 );
 655
 656 #if SASL_VERSION_MAJOR >= 2
 657                         /* XXX the application should free interact results. */
 658                         if ( prompts != NULL && prompts->result != NULL ) {
 659                                 LDAP_FREE( (void *)prompts->result );
 660                                 prompts->result = NULL;
 661                         }
 662 #endif
 663
 664                         if( saslrc == SASL_INTERACT ) {
 665                                 int res;
 666                                 if( !interact ) break;
 667                                 res = (interact)( ld, flags, defaults, prompts );
 668                                 if( res != LDAP_SUCCESS ) {
 669                                         break;
 670                                 }
 671                         }
 672                 } while ( saslrc == SASL_INTERACT );
 673
 674                 ccred.bv_len = credlen;
 675                 ber_bvfree( scred );
 676
 677                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 678                         ld->ld_errno = sasl_err2ldap( saslrc );
 679                         return ld->ld_errno;
 680                 }
 681         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 682
 683         if ( rc != LDAP_SUCCESS ) {
 684                 return rc;
 685         }
 686
 687         if ( saslrc != SASL_OK ) {
 688                 return ld->ld_errno = sasl_err2ldap( saslrc );
 689         }
 690
 691         if( flags != LDAP_SASL_QUIET ) {
 692                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 693                 if( saslrc == SASL_OK && data && *data ) {
 694                         fprintf( stderr, "SASL username: %s\n", data );
 695                 }
 696
 697 #if SASL_VERSION_MAJOR >= 2
 698                 saslrc = sasl_getprop( ctx, SASL_DEFUSERREALM, (SASL_CONST void **) &data );
 699 #else
 700                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 701 #endif
 702                 if( saslrc == SASL_OK && data && *data ) {
 703                         fprintf( stderr, "SASL realm: %s\n", data );
 704                 }
 705         }
 706
 707         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 708         if( saslrc == SASL_OK ) {
 709                 if( flags != LDAP_SASL_QUIET ) {
 710                         fprintf( stderr, "SASL SSF: %lu\n",
 711                                 (unsigned long) *ssf );
 712                 }
 713
 714                 if( ssf && *ssf ) {
 715                         if( flags != LDAP_SASL_QUIET ) {
 716                                 fprintf( stderr, "SASL installing layers\n" );
 717                         }
 718                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 719                 }
 720         }
 721
 722         return rc;
 723 }
 724
 725 int
 726 ldap_int_sasl_external(
 727         LDAP *ld,
 728         LDAPConn *conn,
 729         const char * authid,
 730         ber_len_t ssf )
 731 {
 732         int sc;
 733         sasl_conn_t *ctx;
 734 #if SASL_VERSION_MAJOR < 2
 735         sasl_external_properties_t extprops;
 736 #endif
 737
 738         ctx = conn->lconn_sasl_ctx;
 739
 740         if ( ctx == NULL ) {
 741                 return LDAP_LOCAL_ERROR;
 742         }
 743
 744 #if SASL_VERSION_MAJOR >= 2
 745         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 746 #else
 747         memset( &extprops, '\0', sizeof(extprops) );
 748         extprops.ssf = ssf;
 749         extprops.auth_id = (char *) authid;
 750
 751         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 752                 (void *) &extprops );
 753 #endif
 754
 755         if ( sc != SASL_OK ) {
 756                 return LDAP_LOCAL_ERROR;
 757         }
 758
 759         return LDAP_SUCCESS;
 760 }
 761
 762
 763 int ldap_pvt_sasl_secprops(
 764         const char *in,
 765         sasl_security_properties_t *secprops )
 766 {
 767         int i;
 768         char **props = ldap_str2charray( in, "," );
 769         unsigned sflags = 0;
 770         int got_sflags = 0;
 771         sasl_ssf_t max_ssf = 0;
 772         int got_max_ssf = 0;
 773         sasl_ssf_t min_ssf = 0;
 774         int got_min_ssf = 0;
 775         unsigned maxbufsize = 0;
 776         int got_maxbufsize = 0;
 777
 778         if( props == NULL || secprops == NULL ) {
 779                 return LDAP_PARAM_ERROR;
 780         }
 781
 782         for( i=0; props[i]; i++ ) {
 783                 if( !strcasecmp(props[i], "none") ) {
 784                         got_sflags++;
 785
 786                 } else if( !strcasecmp(props[i], "noplain") ) {
 787                         got_sflags++;
 788                         sflags |= SASL_SEC_NOPLAINTEXT;
 789
 790                 } else if( !strcasecmp(props[i], "noactive") ) {
 791                         got_sflags++;
 792                         sflags |= SASL_SEC_NOACTIVE;
 793
 794                 } else if( !strcasecmp(props[i], "nodict") ) {
 795                         got_sflags++;
 796                         sflags |= SASL_SEC_NODICTIONARY;
 797
 798                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 799                         got_sflags++;
 800                         sflags |= SASL_SEC_FORWARD_SECRECY;
 801
 802                 } else if( !strcasecmp(props[i], "noanonymous")) {
 803                         got_sflags++;
 804                         sflags |= SASL_SEC_NOANONYMOUS;
 805
 806                 } else if( !strcasecmp(props[i], "passcred") ) {
 807                         got_sflags++;
 808                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 809
 810                 } else if( !strncasecmp(props[i],
 811                         "minssf=", sizeof("minssf")) )
 812                 {
 813                         if( isdigit( props[i][sizeof("minssf")] ) ) {
 814                                 got_min_ssf++;
 815                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 816                         } else {
 817                                 return LDAP_NOT_SUPPORTED;
 818                         }
 819
 820                 } else if( !strncasecmp(props[i],
 821                         "maxssf=", sizeof("maxssf")) )
 822                 {
 823                         if( isdigit( props[i][sizeof("maxssf")] ) ) {
 824                                 got_max_ssf++;
 825                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 826                         } else {
 827                                 return LDAP_NOT_SUPPORTED;
 828                         }
 829
 830                 } else if( !strncasecmp(props[i],
 831                         "maxbufsize=", sizeof("maxbufsize")) )
 832                 {
 833                         if( isdigit( props[i][sizeof("maxbufsize")] ) ) {
 834                                 got_maxbufsize++;
 835                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 836                         } else {
 837                                 return LDAP_NOT_SUPPORTED;
 838                         }
 839
 840                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 841                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 842                         {
 843                                 /* bad maxbufsize */
 844                                 return LDAP_PARAM_ERROR;
 845                         }
 846
 847                 } else {
 848                         return LDAP_NOT_SUPPORTED;
 849                 }
 850         }
 851
 852         if(got_sflags) {
 853                 secprops->security_flags = sflags;
 854         }
 855         if(got_min_ssf) {
 856                 secprops->min_ssf = min_ssf;
 857         }
 858         if(got_max_ssf) {
 859                 secprops->max_ssf = max_ssf;
 860         }
 861         if(got_maxbufsize) {
 862                 secprops->maxbufsize = maxbufsize;
 863         }
 864
 865         ldap_charray_free( props );
 866         return LDAP_SUCCESS;
 867 }
 868
 869 int
 870 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 871 {
 872         int rc;
 873
 874         switch( option ) {
 875         case LDAP_OPT_X_SASL_SECPROPS:
 876                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 877                 if( rc == LDAP_SUCCESS ) return 0;
 878         }
 879
 880         return -1;
 881 }
 882
 883 int
 884 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 885 {
 886         if ( ld == NULL )
 887                 return -1;
 888
 889         switch ( option ) {
 890                 case LDAP_OPT_X_SASL_MECH: {
 891                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 892                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 893                 } break;
 894                 case LDAP_OPT_X_SASL_REALM: {
 895                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 896                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 897                 } break;
 898                 case LDAP_OPT_X_SASL_AUTHCID: {
 899                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 900                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 901                 } break;
 902                 case LDAP_OPT_X_SASL_AUTHZID: {
 903                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 904                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 905                 } break;
 906
 907                 case LDAP_OPT_X_SASL_SSF: {
 908                         int sc;
 909                         sasl_ssf_t      *ssf;
 910                         sasl_conn_t *ctx;
 911
 912                         if( ld->ld_defconn == NULL ) {
 913                                 return -1;
 914                         }
 915
 916                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 917
 918                         if ( ctx == NULL ) {
 919                                 return -1;
 920                         }
 921
 922                         sc = sasl_getprop( ctx, SASL_SSF,
 923                                 (SASL_CONST void **) &ssf );
 924
 925                         if ( sc != SASL_OK ) {
 926                                 return -1;
 927                         }
 928
 929                         *(ber_len_t *)arg = *ssf;
 930                 } break;
 931
 932                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 933                         /* this option is write only */
 934                         return -1;
 935
 936                 case LDAP_OPT_X_SASL_SSF_MIN:
 937                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 938                         break;
 939                 case LDAP_OPT_X_SASL_SSF_MAX:
 940                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 941                         break;
 942                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 943                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 944                         break;
 945
 946                 case LDAP_OPT_X_SASL_SECPROPS:
 947                         /* this option is write only */
 948                         return -1;
 949
 950                 default:
 951                         return -1;
 952         }
 953         return 0;
 954 }
 955
 956 int
 957 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 958 {
 959         if ( ld == NULL )
 960                 return -1;
 961
 962         switch ( option ) {
 963         case LDAP_OPT_X_SASL_SSF:
 964                 /* This option is read-only */
 965                 return -1;
 966
 967         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
 968                 int sc;
 969 #if SASL_VERSION_MAJOR < 2
 970                 sasl_external_properties_t extprops;
 971 #endif
 972                 sasl_conn_t *ctx;
 973
 974                 if( ld->ld_defconn == NULL ) {
 975                         return -1;
 976                 }
 977
 978                 ctx = ld->ld_defconn->lconn_sasl_ctx;
 979
 980                 if ( ctx == NULL ) {
 981                         return -1;
 982                 }
 983
 984 #if SASL_VERSION_MAJOR >= 2
 985                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
 986 #else
 987                 memset(&extprops, 0L, sizeof(extprops));
 988
 989                 extprops.ssf = * (ber_len_t *) arg;
 990
 991                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 992                         (void *) &extprops );
 993 #endif
 994
 995                 if ( sc != SASL_OK ) {
 996                         return -1;
 997                 }
 998                 } break;
 999
1000         case LDAP_OPT_X_SASL_SSF_MIN:
1001                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1002                 break;
1003         case LDAP_OPT_X_SASL_SSF_MAX:
1004                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1005                 break;
1006         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1007                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1008                 break;
1009
1010         case LDAP_OPT_X_SASL_SECPROPS: {
1011                 int sc;
1012                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1013                         &ld->ld_options.ldo_sasl_secprops );
1014
1015                 return sc == LDAP_SUCCESS ? 0 : -1;
1016                 }
1017
1018         default:
1019                 return -1;
1020         }
1021         return 0;
1022 }
1023
1024 #ifdef LDAP_R_COMPILE
1025 void *ldap_pvt_sasl_mutex_new(void)
1026 {
1027         ldap_pvt_thread_mutex_t *mutex;
1028
1029         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1030                 sizeof(ldap_pvt_thread_mutex_t) );
1031
1032         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1033                 return mutex;
1034         }
1035         return NULL;
1036 }
1037
1038 int ldap_pvt_sasl_mutex_lock(void *mutex)
1039 {
1040         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1041                 ? SASL_FAIL : SASL_OK;
1042 }
1043
1044 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1045 {
1046         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1047                 ? SASL_FAIL : SASL_OK;
1048 }
1049
1050 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1051 {
1052         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1053         LDAP_FREE( mutex );
1054 }
1055 #endif
1056
1057 #else
1058 int ldap_int_sasl_init( void )
1059 { return LDAP_SUCCESS; }
1060
1061 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1062 { return LDAP_SUCCESS; }
1063
1064 int
1065 ldap_int_sasl_bind(
1066         LDAP                    *ld,
1067         const char              *dn,
1068         const char              *mechs,
1069         LDAPControl             **sctrls,
1070         LDAPControl             **cctrls,
1071         unsigned                flags,
1072         LDAP_SASL_INTERACT_PROC *interact,
1073         void * defaults )
1074 { return LDAP_NOT_SUPPORTED; }
1075
1076 int
1077 ldap_int_sasl_external(
1078         LDAP *ld,
1079         LDAPConn *conn,
1080         const char * authid,
1081         ber_len_t ssf )
1082 { return LDAP_SUCCESS; }
1083
1084 #endif /* HAVE_CYRUS_SASL */