git.sur5r.net Git - openldap/blob - libraries/libldap/cyrus.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10
  11 #include <ac/socket.h>
  12 #include <ac/stdlib.h>
  13 #include <ac/string.h>
  14 #include <ac/time.h>
  15 #include <ac/errno.h>
  16 #include <ac/ctype.h>
  17
  18 #include "ldap-int.h"
  19
  20 #ifdef HAVE_CYRUS_SASL
  21
  22 #ifdef LDAP_R_COMPILE
  23 ldap_pvt_thread_mutex_t ldap_int_sasl_mutex;
  24 #endif
  25
  26 #ifdef HAVE_SASL_SASL_H
  27 #include <sasl/sasl.h>
  28 #else
  29 #include <sasl.h>
  30 #endif
  31
  32 #if SASL_VERSION_MAJOR >= 2
  33 #define SASL_CONST const
  34 #else
  35 #define SASL_CONST
  36 #endif
  37
  38 /*
  39 * Various Cyrus SASL related stuff.
  40 */
  41
  42 int ldap_int_sasl_init( void )
  43 {
  44         /* XXX not threadsafe */
  45         static int sasl_initialized = 0;
  46
  47         static sasl_callback_t client_callbacks[] = {
  48 #ifdef SASL_CB_GETREALM
  49                 { SASL_CB_GETREALM, NULL, NULL },
  50 #endif
  51                 { SASL_CB_USER, NULL, NULL },
  52                 { SASL_CB_AUTHNAME, NULL, NULL },
  53                 { SASL_CB_PASS, NULL, NULL },
  54                 { SASL_CB_ECHOPROMPT, NULL, NULL },
  55                 { SASL_CB_NOECHOPROMPT, NULL, NULL },
  56                 { SASL_CB_LIST_END, NULL, NULL }
  57         };
  58
  59 #ifdef HAVE_SASL_VERSION
  60 #define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
  61         (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
  62
  63         { int rc;
  64         sasl_version( NULL, &rc );
  65         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
  66                 (rc & 0xffff) < SASL_VERSION_STEP) {
  67
  68 #ifdef NEW_LOGGING
  69                 LDAP_LOG( TRANSPORT, INFO,
  70                 "ldap_int_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
  71                         rc, SASL_BUILD_VERSION, 0 );
  72 #else
  73                 Debug( LDAP_DEBUG_ANY,
  74                 "ldap_int_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
  75                         rc, SASL_BUILD_VERSION, 0 );
  76 #endif
  77                 return -1;
  78         }
  79         }
  80 #endif
  81         if ( sasl_initialized ) {
  82                 return 0;
  83         }
  84
  85 /* SASL 2 takes care of its own memory completely internally */
  86 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
  87         sasl_set_alloc(
  88                 ber_memalloc,
  89                 ber_memcalloc,
  90                 ber_memrealloc,
  91                 ber_memfree );
  92 #endif /* CSRIMALLOC */
  93
  94 #ifdef LDAP_R_COMPILE
  95         sasl_set_mutex(
  96                 ldap_pvt_sasl_mutex_new,
  97                 ldap_pvt_sasl_mutex_lock,
  98                 ldap_pvt_sasl_mutex_unlock,
  99                 ldap_pvt_sasl_mutex_dispose );
 100
 101         ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
 102 #endif
 103
 104         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
 105                 sasl_initialized = 1;
 106                 return 0;
 107         }
 108
 109 #if SASL_VERSION_MAJOR < 2
 110         /* A no-op to make sure we link with Cyrus 1.5 */
 111         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
 112 #endif
 113         return -1;
 114 }
 115
 116 /*
 117  * SASL encryption support for LBER Sockbufs
 118  */
 119
 120 struct sb_sasl_data {
 121         sasl_conn_t             *sasl_context;
 122         unsigned                *sasl_maxbuf;
 123         Sockbuf_Buf             sec_buf_in;
 124         Sockbuf_Buf             buf_in;
 125         Sockbuf_Buf             buf_out;
 126 };
 127
 128 static int
 129 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
 130 {
 131         struct sb_sasl_data     *p;
 132
 133         assert( sbiod != NULL );
 134
 135         p = LBER_MALLOC( sizeof( *p ) );
 136         if ( p == NULL )
 137                 return -1;
 138         p->sasl_context = (sasl_conn_t *)arg;
 139         ber_pvt_sb_buf_init( &p->sec_buf_in );
 140         ber_pvt_sb_buf_init( &p->buf_in );
 141         ber_pvt_sb_buf_init( &p->buf_out );
 142         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 143                 LBER_FREE( p );
 144                 errno = ENOMEM;
 145                 return -1;
 146         }
 147         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
 148                 (SASL_CONST void **) &p->sasl_maxbuf );
 149
 150         sbiod->sbiod_pvt = p;
 151
 152         return 0;
 153 }
 154
 155 static int
 156 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 157 {
 158         struct sb_sasl_data     *p;
 159
 160         assert( sbiod != NULL );
 161
 162         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 163 #if SASL_VERSION_MAJOR >= 2
 164         /*
 165          * SASLv2 encode/decode buffers are managed by
 166          * libsasl2. Ensure they are not freed by liblber.
 167          */
 168         p->buf_in.buf_base = NULL;
 169         p->buf_out.buf_base = NULL;
 170 #endif
 171         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 172         ber_pvt_sb_buf_destroy( &p->buf_in );
 173         ber_pvt_sb_buf_destroy( &p->buf_out );
 174         LBER_FREE( p );
 175         sbiod->sbiod_pvt = NULL;
 176         return 0;
 177 }
 178
 179 static ber_len_t
 180 sb_sasl_pkt_length( const unsigned char *buf, unsigned max, int debuglevel )
 181 {
 182         ber_len_t               size;
 183
 184         assert( buf != NULL );
 185
 186         size = buf[0] << 24
 187                 | buf[1] << 16
 188                 | buf[2] << 8
 189                 | buf[3];
 190
 191         if ( size > SASL_MAX_BUFF_SIZE ) {
 192                 /* somebody is trying to mess me up. */
 193                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 194                         "sb_sasl_pkt_length: received illegal packet length "
 195                         "of %lu bytes\n", (unsigned long)size );
 196                 size = 16; /* this should lead to an error. */
 197         }
 198
 199         return size + 4; /* include the size !!! */
 200 }
 201
 202 /* Drop a processed packet from the input buffer */
 203 static void
 204 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, unsigned max, int debuglevel )
 205 {
 206         ber_slen_t                      len;
 207
 208         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 209         if ( len > 0 )
 210                 AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
 211                         sec_buf_in->buf_end, len );
 212
 213         if ( len >= 4 ) {
 214                 sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
 215                         max, debuglevel);
 216         }
 217         else {
 218                 sec_buf_in->buf_end = 0;
 219         }
 220         sec_buf_in->buf_ptr = len;
 221 }
 222
 223 static ber_slen_t
 224 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 225 {
 226         struct sb_sasl_data     *p;
 227         ber_slen_t              ret, bufptr;
 228
 229         assert( sbiod != NULL );
 230         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 231
 232         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 233
 234         /* Are there anything left in the buffer? */
 235         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 236         bufptr = ret;
 237         len -= ret;
 238
 239         if ( len == 0 )
 240                 return bufptr;
 241
 242 #if SASL_VERSION_MAJOR >= 2
 243         ber_pvt_sb_buf_init( &p->buf_in );
 244 #else
 245         ber_pvt_sb_buf_destroy( &p->buf_in );
 246 #endif
 247
 248         /* Read the length of the packet */
 249         while ( p->sec_buf_in.buf_ptr < 4 ) {
 250                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 251                         4 - p->sec_buf_in.buf_ptr );
 252 #ifdef EINTR
 253                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 254                         continue;
 255 #endif
 256                 if ( ret <= 0 )
 257                         return bufptr ? bufptr : ret;
 258
 259                 p->sec_buf_in.buf_ptr += ret;
 260         }
 261
 262         /* The new packet always starts at p->sec_buf_in.buf_base */
 263         ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
 264                 *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 265
 266         /* Grow the packet buffer if neccessary */
 267         if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
 268                 ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 )
 269         {
 270                 errno = ENOMEM;
 271                 return -1;
 272         }
 273         p->sec_buf_in.buf_end = ret;
 274
 275         /* Did we read the whole encrypted packet? */
 276         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 277                 /* No, we have got only a part of it */
 278                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 279
 280                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 281                         p->sec_buf_in.buf_ptr, ret );
 282 #ifdef EINTR
 283                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 284                         continue;
 285 #endif
 286                 if ( ret <= 0 )
 287                         return bufptr ? bufptr : ret;
 288
 289                 p->sec_buf_in.buf_ptr += ret;
 290         }
 291
 292         /* Decode the packet */
 293         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 294                 p->sec_buf_in.buf_end,
 295                 (SASL_CONST char **)&p->buf_in.buf_base,
 296                 (unsigned *)&p->buf_in.buf_end );
 297
 298         /* Drop the packet from the input buffer */
 299         sb_sasl_drop_packet( &p->sec_buf_in,
 300                         *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 301
 302         if ( ret != SASL_OK ) {
 303                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 304                         "sb_sasl_read: failed to decode packet: %s\n",
 305                         sasl_errstring( ret, NULL, NULL ) );
 306                 errno = EIO;
 307                 return -1;
 308         }
 309
 310         p->buf_in.buf_size = p->buf_in.buf_end;
 311
 312         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 313
 314         return bufptr;
 315 }
 316
 317 static ber_slen_t
 318 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 319 {
 320         struct sb_sasl_data     *p;
 321         int                     ret;
 322
 323         assert( sbiod != NULL );
 324         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 325
 326         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 327
 328         /* Are there anything left in the buffer? */
 329         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 330                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 331                 if ( ret < 0 )
 332                         return ret;
 333                 /* Still have something left?? */
 334                 if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 335                         errno = EAGAIN;
 336                         return 0;
 337                 }
 338         }
 339
 340         /* now encode the next packet. */
 341 #if SASL_VERSION_MAJOR >= 2
 342         ber_pvt_sb_buf_init( &p->buf_out );
 343         /* sasl v2 makes sure this number is correct */
 344         if ( len > *p->sasl_maxbuf )
 345                 len = *p->sasl_maxbuf;
 346 #else
 347         ber_pvt_sb_buf_destroy( &p->buf_out );
 348         if ( len > *p->sasl_maxbuf - 100 )
 349                 len = *p->sasl_maxbuf - 100;    /* For safety margin */
 350 #endif
 351         ret = sasl_encode( p->sasl_context, buf, len,
 352                 (SASL_CONST char **)&p->buf_out.buf_base,
 353                 (unsigned *)&p->buf_out.buf_size );
 354         if ( ret != SASL_OK ) {
 355                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 356                         "sb_sasl_write: failed to encode packet: %s\n",
 357                         sasl_errstring( ret, NULL, NULL ) );
 358                 return -1;
 359         }
 360         p->buf_out.buf_end = p->buf_out.buf_size;
 361
 362         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 363         if ( ret <= 0 )
 364                 return ret;
 365         return len;
 366 }
 367
 368 static int
 369 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 370 {
 371         struct sb_sasl_data     *p;
 372
 373         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 374
 375         if ( opt == LBER_SB_OPT_DATA_READY ) {
 376                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 377                         return 1;
 378         }
 379
 380         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 381 }
 382
 383 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 384         sb_sasl_setup,          /* sbi_setup */
 385         sb_sasl_remove,         /* sbi_remove */
 386         sb_sasl_ctrl,           /* sbi_ctrl */
 387         sb_sasl_read,           /* sbi_read */
 388         sb_sasl_write,          /* sbi_write */
 389         NULL                    /* sbi_close */
 390 };
 391
 392 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 393 {
 394 #ifdef NEW_LOGGING
 395         LDAP_LOG ( TRANSPORT, ENTRY, "ldap_pvt_sasl_install\n", 0, 0, 0 );
 396 #else
 397         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 398                 0, 0, 0 );
 399 #endif
 400
 401         /* don't install the stuff unless security has been negotiated */
 402
 403         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 404                         &ldap_pvt_sockbuf_io_sasl ) )
 405         {
 406 #ifdef LDAP_DEBUG
 407                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 408                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 409 #endif
 410                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 411                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 412         }
 413
 414         return LDAP_SUCCESS;
 415 }
 416
 417 void ldap_pvt_sasl_remove( Sockbuf *sb )
 418 {
 419         ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl,
 420                 LBER_SBIOD_LEVEL_APPLICATION );
 421 #ifdef LDAP_DEBUG
 422         ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
 423                 LBER_SBIOD_LEVEL_APPLICATION );
 424 #endif
 425 }
 426
 427 static int
 428 sasl_err2ldap( int saslerr )
 429 {
 430         int rc;
 431
 432         switch (saslerr) {
 433                 case SASL_CONTINUE:
 434                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 435                         break;
 436                 case SASL_INTERACT:
 437                         rc = LDAP_LOCAL_ERROR;
 438                         break;
 439                 case SASL_OK:
 440                         rc = LDAP_SUCCESS;
 441                         break;
 442                 case SASL_FAIL:
 443                         rc = LDAP_LOCAL_ERROR;
 444                         break;
 445                 case SASL_NOMEM:
 446                         rc = LDAP_NO_MEMORY;
 447                         break;
 448                 case SASL_NOMECH:
 449                         rc = LDAP_AUTH_UNKNOWN;
 450                         break;
 451                 case SASL_BADAUTH:
 452                         rc = LDAP_AUTH_UNKNOWN;
 453                         break;
 454                 case SASL_NOAUTHZ:
 455                         rc = LDAP_PARAM_ERROR;
 456                         break;
 457                 case SASL_TOOWEAK:
 458                 case SASL_ENCRYPT:
 459                         rc = LDAP_AUTH_UNKNOWN;
 460                         break;
 461                 default:
 462                         rc = LDAP_LOCAL_ERROR;
 463                         break;
 464         }
 465
 466         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 467         return rc;
 468 }
 469
 470 int
 471 ldap_int_sasl_open(
 472         LDAP *ld,
 473         LDAPConn *lc,
 474         const char * host )
 475 {
 476         int rc;
 477         sasl_conn_t *ctx;
 478
 479         assert( lc->lconn_sasl_authctx == NULL );
 480
 481         if ( host == NULL ) {
 482                 ld->ld_errno = LDAP_LOCAL_ERROR;
 483                 return ld->ld_errno;
 484         }
 485
 486 #if SASL_VERSION_MAJOR >= 2
 487         rc = sasl_client_new( "ldap", host, NULL, NULL,
 488                 NULL, 0, &ctx );
 489 #else
 490         rc = sasl_client_new( "ldap", host, NULL,
 491                 SASL_SECURITY_LAYER, &ctx );
 492 #endif
 493
 494         if ( rc != SASL_OK ) {
 495                 ld->ld_errno = sasl_err2ldap( rc );
 496                 return ld->ld_errno;
 497         }
 498
 499 #ifdef NEW_LOGGING
 500         LDAP_LOG ( TRANSPORT, DETAIL1, "ldap_int_sasl_open: host=%s\n",
 501                 host, 0, 0 );
 502 #else
 503         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 504                 host, 0, 0 );
 505 #endif
 506
 507         lc->lconn_sasl_authctx = ctx;
 508
 509         return LDAP_SUCCESS;
 510 }
 511
 512 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 513 {
 514         sasl_conn_t *ctx = lc->lconn_sasl_authctx;
 515
 516         if( ctx != NULL ) {
 517                 sasl_dispose( &ctx );
 518                 if ( lc->lconn_sasl_sockctx && ctx != lc->lconn_sasl_sockctx ) {
 519                         ctx = lc->lconn_sasl_sockctx;
 520                         sasl_dispose( &ctx );
 521                 }
 522                 lc->lconn_sasl_sockctx = NULL;
 523                 lc->lconn_sasl_authctx = NULL;
 524         }
 525
 526         return LDAP_SUCCESS;
 527 }
 528
 529 int
 530 ldap_int_sasl_bind(
 531         LDAP                    *ld,
 532         const char              *dn,
 533         const char              *mechs,
 534         LDAPControl             **sctrls,
 535         LDAPControl             **cctrls,
 536         unsigned                flags,
 537         LDAP_SASL_INTERACT_PROC *interact,
 538         void * defaults )
 539 {
 540         char *data;
 541         const char *mech = NULL;
 542         const char *pmech = NULL;
 543         int                     saslrc, rc;
 544         sasl_ssf_t              *ssf = NULL;
 545         sasl_conn_t     *ctx, *oldctx = NULL;
 546         sasl_interact_t *prompts = NULL;
 547         unsigned credlen;
 548         struct berval ccred;
 549         ber_socket_t            sd;
 550         void    *ssl;
 551
 552 #ifdef NEW_LOGGING
 553         LDAP_LOG ( TRANSPORT, ARGS, "ldap_int_sasl_bind: %s\n",
 554                 mechs ? mechs : "<null>", 0, 0 );
 555 #else
 556         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 557                 mechs ? mechs : "<null>", 0, 0 );
 558 #endif
 559
 560         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 561         if (ld->ld_version < LDAP_VERSION3) {
 562                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 563                 return ld->ld_errno;
 564         }
 565
 566         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 567
 568         if ( sd == AC_SOCKET_INVALID ) {
 569                 /* not connected yet */
 570                 int rc;
 571
 572                 rc = ldap_open_defconn( ld );
 573                 if( rc < 0 ) return ld->ld_errno;
 574
 575                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 576
 577                 if( sd == AC_SOCKET_INVALID ) {
 578                         ld->ld_errno = LDAP_LOCAL_ERROR;
 579                         return ld->ld_errno;
 580                 }
 581         }
 582
 583         oldctx = ld->ld_defconn->lconn_sasl_authctx;
 584
 585         /* If we already have an authentication context, clear it out */
 586         if( oldctx ) {
 587                 if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
 588                         sasl_dispose( &oldctx );
 589                 }
 590                 ld->ld_defconn->lconn_sasl_authctx = NULL;
 591         }
 592
 593         rc = ldap_int_sasl_open( ld, ld->ld_defconn,
 594                 ld->ld_defconn->lconn_server->lud_host ?
 595                 ld->ld_defconn->lconn_server->lud_host : "localhost" );
 596
 597         if ( rc != LDAP_SUCCESS ) return rc;
 598
 599         ctx = ld->ld_defconn->lconn_sasl_authctx;
 600
 601         /* Check for TLS */
 602         ssl = ldap_pvt_tls_sb_ctx( ld->ld_sb );
 603         if ( ssl ) {
 604                 struct berval authid = { 0, NULL };
 605                 ber_len_t fac;
 606
 607                 fac = ldap_pvt_tls_get_strength( ssl );
 608                 /* failure is OK, we just can't use SASL EXTERNAL */
 609                 (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 610
 611                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 612                 LDAP_FREE( authid.bv_val );
 613         }
 614
 615         /* Check for local */
 616         if ( ldap_pvt_url_scheme2proto( ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC ) {
 617                 char authid[sizeof("uidNumber=4294967295+gidNumber=4294967295,"
 618                         "cn=peercred,cn=external,cn=auth")];
 619                 sprintf( authid, "uidNumber=%d+gidNumber=%d,"
 620                         "cn=peercred,cn=external,cn=auth",
 621                         (int) geteuid(), (int) getegid() );
 622                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid, LDAP_PVT_SASL_LOCAL_SSF );
 623         }
 624
 625         /* (re)set security properties */
 626         sasl_setprop( ctx, SASL_SEC_PROPS,
 627                 &ld->ld_options.ldo_sasl_secprops );
 628
 629         ccred.bv_val = NULL;
 630         ccred.bv_len = 0;
 631
 632         do {
 633                 saslrc = sasl_client_start( ctx,
 634                         mechs,
 635 #if SASL_VERSION_MAJOR < 2
 636                         NULL,
 637 #endif
 638                         &prompts,
 639                         (SASL_CONST char **)&ccred.bv_val,
 640                         &credlen,
 641                         &mech );
 642
 643                 if( pmech == NULL && mech != NULL ) {
 644                         pmech = mech;
 645
 646                         if( flags != LDAP_SASL_QUIET ) {
 647                                 fprintf(stderr,
 648                                         "SASL/%s authentication started\n",
 649                                         pmech );
 650                         }
 651                 }
 652
 653                 if( saslrc == SASL_INTERACT ) {
 654                         int res;
 655                         if( !interact ) break;
 656                         res = (interact)( ld, flags, defaults, prompts );
 657
 658                         if( res != LDAP_SUCCESS ) break;
 659                 }
 660         } while ( saslrc == SASL_INTERACT );
 661
 662         ccred.bv_len = credlen;
 663
 664         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 665                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 666 #if SASL_VERSION_MAJOR >= 2
 667                 ld->ld_error = (char *)sasl_errdetail( ctx );
 668 #endif
 669                 goto done;
 670         }
 671
 672         do {
 673                 struct berval *scred;
 674                 unsigned credlen;
 675
 676                 scred = NULL;
 677
 678                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 679
 680                 if ( ccred.bv_val != NULL ) {
 681 #if SASL_VERSION_MAJOR < 2
 682                         LDAP_FREE( ccred.bv_val );
 683 #endif
 684                         ccred.bv_val = NULL;
 685                 }
 686
 687                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 688                         if( scred && scred->bv_len ) {
 689                                 /* and server provided us with data? */
 690 #ifdef NEW_LOGGING
 691                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 692                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 693                                         rc, saslrc, scred->bv_len );
 694 #else
 695                                 Debug( LDAP_DEBUG_TRACE,
 696                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 697                                         rc, saslrc, scred->bv_len );
 698 #endif
 699                                 ber_bvfree( scred );
 700                         }
 701                         rc = ld->ld_errno;
 702                         goto done;
 703                 }
 704
 705                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 706                         /* we're done, no need to step */
 707                         if( scred && scred->bv_len ) {
 708                                 /* but server provided us with data! */
 709 #ifdef NEW_LOGGING
 710                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 711                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 712                                         rc, saslrc, scred->bv_len );
 713 #else
 714                                 Debug( LDAP_DEBUG_TRACE,
 715                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 716                                         rc, saslrc, scred->bv_len );
 717 #endif
 718                                 ber_bvfree( scred );
 719                                 rc = ld->ld_errno = LDAP_LOCAL_ERROR;
 720                                 goto done;
 721                         }
 722                         break;
 723                 }
 724
 725                 do {
 726                         saslrc = sasl_client_step( ctx,
 727                                 (scred == NULL) ? NULL : scred->bv_val,
 728                                 (scred == NULL) ? 0 : scred->bv_len,
 729                                 &prompts,
 730                                 (SASL_CONST char **)&ccred.bv_val,
 731                                 &credlen );
 732
 733 #ifdef NEW_LOGGING
 734                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 735                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc,0,0 );
 736 #else
 737                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 738                                 saslrc, 0, 0 );
 739 #endif
 740
 741                         if( saslrc == SASL_INTERACT ) {
 742                                 int res;
 743                                 if( !interact ) break;
 744                                 res = (interact)( ld, flags, defaults, prompts );
 745                                 if( res != LDAP_SUCCESS ) break;
 746                         }
 747                 } while ( saslrc == SASL_INTERACT );
 748
 749                 ccred.bv_len = credlen;
 750                 ber_bvfree( scred );
 751
 752                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 753                         ld->ld_errno = sasl_err2ldap( saslrc );
 754 #if SASL_VERSION_MAJOR >= 2
 755                         ld->ld_error = (char *)sasl_errdetail( ctx );
 756 #endif
 757                         rc = ld->ld_errno;
 758                         goto done;
 759                 }
 760         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 761
 762         if ( rc != LDAP_SUCCESS ) goto done;
 763
 764         if ( saslrc != SASL_OK ) {
 765 #if SASL_VERSION_MAJOR >= 2
 766                 ld->ld_error = (char *)sasl_errdetail( ctx );
 767 #endif
 768                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 769                 goto done;
 770         }
 771
 772         if( flags != LDAP_SASL_QUIET ) {
 773                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 774                 if( saslrc == SASL_OK && data && *data ) {
 775                         fprintf( stderr, "SASL username: %s\n", data );
 776                 }
 777
 778 #if SASL_VERSION_MAJOR < 2
 779                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 780                 if( saslrc == SASL_OK && data && *data ) {
 781                         fprintf( stderr, "SASL realm: %s\n", data );
 782                 }
 783 #endif
 784         }
 785
 786         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 787         if( saslrc == SASL_OK ) {
 788                 if( flags != LDAP_SASL_QUIET ) {
 789                         fprintf( stderr, "SASL SSF: %lu\n",
 790                                 (unsigned long) *ssf );
 791                 }
 792
 793                 if( ssf && *ssf ) {
 794                         if( flags != LDAP_SASL_QUIET ) {
 795                                 fprintf( stderr, "SASL installing layers\n" );
 796                         }
 797                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 798                                 oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 799                                 sasl_dispose( &oldctx );
 800                                 ldap_pvt_sasl_remove( ld->ld_sb );
 801                         }
 802                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 803                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 804                 }
 805         }
 806         ld->ld_defconn->lconn_sasl_authctx = ctx;
 807
 808 done:
 809         return rc;
 810 }
 811
 812 int
 813 ldap_int_sasl_external(
 814         LDAP *ld,
 815         LDAPConn *conn,
 816         const char * authid,
 817         ber_len_t ssf )
 818 {
 819         int sc;
 820         sasl_conn_t *ctx;
 821 #if SASL_VERSION_MAJOR < 2
 822         sasl_external_properties_t extprops;
 823 #endif
 824
 825         ctx = conn->lconn_sasl_authctx;
 826
 827         if ( ctx == NULL ) {
 828                 return LDAP_LOCAL_ERROR;
 829         }
 830
 831 #if SASL_VERSION_MAJOR >= 2
 832         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 833         if ( sc == SASL_OK )
 834                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 835 #else
 836         memset( &extprops, '\0', sizeof(extprops) );
 837         extprops.ssf = ssf;
 838         extprops.auth_id = (char *) authid;
 839
 840         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 841                 (void *) &extprops );
 842 #endif
 843
 844         if ( sc != SASL_OK ) {
 845                 return LDAP_LOCAL_ERROR;
 846         }
 847
 848         return LDAP_SUCCESS;
 849 }
 850
 851
 852 int ldap_pvt_sasl_secprops(
 853         const char *in,
 854         sasl_security_properties_t *secprops )
 855 {
 856         int i;
 857         char **props = ldap_str2charray( in, "," );
 858         unsigned sflags = 0;
 859         int got_sflags = 0;
 860         sasl_ssf_t max_ssf = 0;
 861         int got_max_ssf = 0;
 862         sasl_ssf_t min_ssf = 0;
 863         int got_min_ssf = 0;
 864         unsigned maxbufsize = 0;
 865         int got_maxbufsize = 0;
 866
 867         if( props == NULL || secprops == NULL ) {
 868                 return LDAP_PARAM_ERROR;
 869         }
 870
 871         for( i=0; props[i]; i++ ) {
 872                 if( !strcasecmp(props[i], "none") ) {
 873                         got_sflags++;
 874
 875                 } else if( !strcasecmp(props[i], "noplain") ) {
 876                         got_sflags++;
 877                         sflags |= SASL_SEC_NOPLAINTEXT;
 878
 879                 } else if( !strcasecmp(props[i], "noactive") ) {
 880                         got_sflags++;
 881                         sflags |= SASL_SEC_NOACTIVE;
 882
 883                 } else if( !strcasecmp(props[i], "nodict") ) {
 884                         got_sflags++;
 885                         sflags |= SASL_SEC_NODICTIONARY;
 886
 887                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 888                         got_sflags++;
 889                         sflags |= SASL_SEC_FORWARD_SECRECY;
 890
 891                 } else if( !strcasecmp(props[i], "noanonymous")) {
 892                         got_sflags++;
 893                         sflags |= SASL_SEC_NOANONYMOUS;
 894
 895                 } else if( !strcasecmp(props[i], "passcred") ) {
 896                         got_sflags++;
 897                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 898
 899                 } else if( !strncasecmp(props[i],
 900                         "minssf=", sizeof("minssf")) )
 901                 {
 902                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 903                                 got_min_ssf++;
 904                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 905                         } else {
 906                                 return LDAP_NOT_SUPPORTED;
 907                         }
 908
 909                 } else if( !strncasecmp(props[i],
 910                         "maxssf=", sizeof("maxssf")) )
 911                 {
 912                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 913                                 got_max_ssf++;
 914                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 915                         } else {
 916                                 return LDAP_NOT_SUPPORTED;
 917                         }
 918
 919                 } else if( !strncasecmp(props[i],
 920                         "maxbufsize=", sizeof("maxbufsize")) )
 921                 {
 922                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 923                                 got_maxbufsize++;
 924                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 925                         } else {
 926                                 return LDAP_NOT_SUPPORTED;
 927                         }
 928
 929                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 930                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 931                         {
 932                                 /* bad maxbufsize */
 933                                 return LDAP_PARAM_ERROR;
 934                         }
 935
 936                 } else {
 937                         return LDAP_NOT_SUPPORTED;
 938                 }
 939         }
 940
 941         if(got_sflags) {
 942                 secprops->security_flags = sflags;
 943         }
 944         if(got_min_ssf) {
 945                 secprops->min_ssf = min_ssf;
 946         }
 947         if(got_max_ssf) {
 948                 secprops->max_ssf = max_ssf;
 949         }
 950         if(got_maxbufsize) {
 951                 secprops->maxbufsize = maxbufsize;
 952         }
 953
 954         ldap_charray_free( props );
 955         return LDAP_SUCCESS;
 956 }
 957
 958 int
 959 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 960 {
 961         int rc;
 962
 963         switch( option ) {
 964         case LDAP_OPT_X_SASL_SECPROPS:
 965                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 966                 if( rc == LDAP_SUCCESS ) return 0;
 967         }
 968
 969         return -1;
 970 }
 971
 972 int
 973 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 974 {
 975         if ( ld == NULL )
 976                 return -1;
 977
 978         switch ( option ) {
 979                 case LDAP_OPT_X_SASL_MECH: {
 980                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 981                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 982                 } break;
 983                 case LDAP_OPT_X_SASL_REALM: {
 984                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 985                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 986                 } break;
 987                 case LDAP_OPT_X_SASL_AUTHCID: {
 988                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 989                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 990                 } break;
 991                 case LDAP_OPT_X_SASL_AUTHZID: {
 992                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 993                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 994                 } break;
 995
 996                 case LDAP_OPT_X_SASL_SSF: {
 997                         int sc;
 998                         sasl_ssf_t      *ssf;
 999                         sasl_conn_t *ctx;
1000
1001                         if( ld->ld_defconn == NULL ) {
1002                                 return -1;
1003                         }
1004
1005                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
1006
1007                         if ( ctx == NULL ) {
1008                                 return -1;
1009                         }
1010
1011                         sc = sasl_getprop( ctx, SASL_SSF,
1012                                 (SASL_CONST void **) &ssf );
1013
1014                         if ( sc != SASL_OK ) {
1015                                 return -1;
1016                         }
1017
1018                         *(ber_len_t *)arg = *ssf;
1019                 } break;
1020
1021                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
1022                         /* this option is write only */
1023                         return -1;
1024
1025                 case LDAP_OPT_X_SASL_SSF_MIN:
1026                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
1027                         break;
1028                 case LDAP_OPT_X_SASL_SSF_MAX:
1029                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
1030                         break;
1031                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1032                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1033                         break;
1034
1035                 case LDAP_OPT_X_SASL_SECPROPS:
1036                         /* this option is write only */
1037                         return -1;
1038
1039                 default:
1040                         return -1;
1041         }
1042         return 0;
1043 }
1044
1045 int
1046 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1047 {
1048         if ( ld == NULL )
1049                 return -1;
1050
1051         switch ( option ) {
1052         case LDAP_OPT_X_SASL_SSF:
1053                 /* This option is read-only */
1054                 return -1;
1055
1056         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1057                 int sc;
1058 #if SASL_VERSION_MAJOR < 2
1059                 sasl_external_properties_t extprops;
1060 #endif
1061                 sasl_conn_t *ctx;
1062
1063                 if( ld->ld_defconn == NULL ) {
1064                         return -1;
1065                 }
1066
1067                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1068
1069                 if ( ctx == NULL ) {
1070                         return -1;
1071                 }
1072
1073 #if SASL_VERSION_MAJOR >= 2
1074                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1075 #else
1076                 memset(&extprops, 0L, sizeof(extprops));
1077
1078                 extprops.ssf = * (ber_len_t *) arg;
1079
1080                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1081                         (void *) &extprops );
1082 #endif
1083
1084                 if ( sc != SASL_OK ) {
1085                         return -1;
1086                 }
1087                 } break;
1088
1089         case LDAP_OPT_X_SASL_SSF_MIN:
1090                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1091                 break;
1092         case LDAP_OPT_X_SASL_SSF_MAX:
1093                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1094                 break;
1095         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1096                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1097                 break;
1098
1099         case LDAP_OPT_X_SASL_SECPROPS: {
1100                 int sc;
1101                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1102                         &ld->ld_options.ldo_sasl_secprops );
1103
1104                 return sc == LDAP_SUCCESS ? 0 : -1;
1105                 }
1106
1107         default:
1108                 return -1;
1109         }
1110         return 0;
1111 }
1112
1113 #ifdef LDAP_R_COMPILE
1114 #define LDAP_DEBUG_R_SASL
1115 void *ldap_pvt_sasl_mutex_new(void)
1116 {
1117         ldap_pvt_thread_mutex_t *mutex;
1118
1119         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1120                 sizeof(ldap_pvt_thread_mutex_t) );
1121
1122         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1123                 return mutex;
1124         }
1125 #ifndef LDAP_DEBUG_R_SASL
1126         assert( 0 );
1127 #endif /* !LDAP_DEBUG_R_SASL */
1128         return NULL;
1129 }
1130
1131 int ldap_pvt_sasl_mutex_lock(void *mutex)
1132 {
1133 #ifdef LDAP_DEBUG_R_SASL
1134         if ( mutex == NULL ) {
1135                 return SASL_OK;
1136         }
1137 #else /* !LDAP_DEBUG_R_SASL */
1138         assert( mutex );
1139 #endif /* !LDAP_DEBUG_R_SASL */
1140         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1141                 ? SASL_FAIL : SASL_OK;
1142 }
1143
1144 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1145 {
1146 #ifdef LDAP_DEBUG_R_SASL
1147         if ( mutex == NULL ) {
1148                 return SASL_OK;
1149         }
1150 #else /* !LDAP_DEBUG_R_SASL */
1151         assert( mutex );
1152 #endif /* !LDAP_DEBUG_R_SASL */
1153         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1154                 ? SASL_FAIL : SASL_OK;
1155 }
1156
1157 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1158 {
1159 #ifdef LDAP_DEBUG_R_SASL
1160         if ( mutex == NULL ) {
1161                 return;
1162         }
1163 #else /* !LDAP_DEBUG_R_SASL */
1164         assert( mutex );
1165 #endif /* !LDAP_DEBUG_R_SASL */
1166         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1167         LDAP_FREE( mutex );
1168 }
1169 #endif
1170
1171 #else
1172 int ldap_int_sasl_init( void )
1173 { return LDAP_SUCCESS; }
1174
1175 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1176 { return LDAP_SUCCESS; }
1177
1178 int
1179 ldap_int_sasl_bind(
1180         LDAP                    *ld,
1181         const char              *dn,
1182         const char              *mechs,
1183         LDAPControl             **sctrls,
1184         LDAPControl             **cctrls,
1185         unsigned                flags,
1186         LDAP_SASL_INTERACT_PROC *interact,
1187         void * defaults )
1188 { return LDAP_NOT_SUPPORTED; }
1189
1190 int
1191 ldap_int_sasl_external(
1192         LDAP *ld,
1193         LDAPConn *conn,
1194         const char * authid,
1195         ber_len_t ssf )
1196 { return LDAP_SUCCESS; }
1197
1198 #endif /* HAVE_CYRUS_SASL */