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 static int
 418 sasl_err2ldap( int saslerr )
 419 {
 420         int rc;
 421
 422         switch (saslerr) {
 423                 case SASL_CONTINUE:
 424                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 425                         break;
 426                 case SASL_INTERACT:
 427                         rc = LDAP_LOCAL_ERROR;
 428                         break;
 429                 case SASL_OK:
 430                         rc = LDAP_SUCCESS;
 431                         break;
 432                 case SASL_FAIL:
 433                         rc = LDAP_LOCAL_ERROR;
 434                         break;
 435                 case SASL_NOMEM:
 436                         rc = LDAP_NO_MEMORY;
 437                         break;
 438                 case SASL_NOMECH:
 439                         rc = LDAP_AUTH_UNKNOWN;
 440                         break;
 441                 case SASL_BADAUTH:
 442                         rc = LDAP_AUTH_UNKNOWN;
 443                         break;
 444                 case SASL_NOAUTHZ:
 445                         rc = LDAP_PARAM_ERROR;
 446                         break;
 447                 case SASL_TOOWEAK:
 448                 case SASL_ENCRYPT:
 449                         rc = LDAP_AUTH_UNKNOWN;
 450                         break;
 451                 default:
 452                         rc = LDAP_LOCAL_ERROR;
 453                         break;
 454         }
 455
 456         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 457         return rc;
 458 }
 459
 460 int
 461 ldap_int_sasl_open(
 462         LDAP *ld,
 463         LDAPConn *lc,
 464         const char * host )
 465 {
 466         int rc;
 467         sasl_conn_t *ctx;
 468
 469         assert( lc->lconn_sasl_ctx == NULL );
 470
 471         if ( host == NULL ) {
 472                 ld->ld_errno = LDAP_LOCAL_ERROR;
 473                 return ld->ld_errno;
 474         }
 475
 476 #if SASL_VERSION_MAJOR >= 2
 477         rc = sasl_client_new( "ldap", host, NULL, NULL,
 478                 NULL, 0, &ctx );
 479 #else
 480         rc = sasl_client_new( "ldap", host, NULL,
 481                 SASL_SECURITY_LAYER, &ctx );
 482 #endif
 483
 484         if ( rc != SASL_OK ) {
 485                 ld->ld_errno = sasl_err2ldap( rc );
 486                 return ld->ld_errno;
 487         }
 488
 489 #ifdef NEW_LOGGING
 490         LDAP_LOG ( TRANSPORT, DETAIL1, "ldap_int_sasl_open: host=%s\n",
 491                 host, 0, 0 );
 492 #else
 493         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 494                 host, 0, 0 );
 495 #endif
 496
 497         lc->lconn_sasl_ctx = ctx;
 498
 499         return LDAP_SUCCESS;
 500 }
 501
 502 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 503 {
 504         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 505
 506         if( ctx != NULL ) {
 507                 sasl_dispose( &ctx );
 508                 lc->lconn_sasl_ctx = NULL;
 509         }
 510
 511         return LDAP_SUCCESS;
 512 }
 513
 514 int
 515 ldap_int_sasl_bind(
 516         LDAP                    *ld,
 517         const char              *dn,
 518         const char              *mechs,
 519         LDAPControl             **sctrls,
 520         LDAPControl             **cctrls,
 521         unsigned                flags,
 522         LDAP_SASL_INTERACT_PROC *interact,
 523         void * defaults )
 524 {
 525         char *data;
 526         const char *mech = NULL;
 527         const char *pmech = NULL;
 528         int                     saslrc, rc;
 529         sasl_ssf_t              *ssf = NULL;
 530         sasl_conn_t     *ctx;
 531         sasl_interact_t *prompts = NULL;
 532         unsigned credlen;
 533         struct berval ccred;
 534         ber_socket_t            sd;
 535         void    *ssl;
 536
 537 #ifdef NEW_LOGGING
 538         LDAP_LOG ( TRANSPORT, ARGS, "ldap_int_sasl_bind: %s\n",
 539                 mechs ? mechs : "<null>", 0, 0 );
 540 #else
 541         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 542                 mechs ? mechs : "<null>", 0, 0 );
 543 #endif
 544
 545         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 546         if (ld->ld_version < LDAP_VERSION3) {
 547                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 548                 return ld->ld_errno;
 549         }
 550
 551         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 552
 553         if ( sd == AC_SOCKET_INVALID ) {
 554                 /* not connected yet */
 555                 int rc;
 556
 557                 rc = ldap_open_defconn( ld );
 558                 if( rc < 0 ) return ld->ld_errno;
 559
 560                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 561
 562                 if( sd == AC_SOCKET_INVALID ) {
 563                         ld->ld_errno = LDAP_LOCAL_ERROR;
 564                         return ld->ld_errno;
 565                 }
 566         }
 567
 568         ctx = ld->ld_defconn->lconn_sasl_ctx;
 569
 570         /* If we already have a context, shut it down */
 571         if( ctx ) {
 572                 /* Do an anonymous bind to kill the server's context */
 573                 rc = ldap_simple_bind_s( ld, "", NULL );
 574
 575                 /* dispose of the old context */
 576                 ldap_int_sasl_close( ld, ld->ld_defconn );
 577         }
 578
 579         rc = ldap_int_sasl_open( ld, ld->ld_defconn,
 580                 ld->ld_defconn->lconn_server->lud_host ?
 581                 ld->ld_defconn->lconn_server->lud_host : "localhost" );
 582
 583         if ( rc != LDAP_SUCCESS ) return rc;
 584
 585         ctx = ld->ld_defconn->lconn_sasl_ctx;
 586
 587         /* Check for TLS */
 588         ssl = ldap_pvt_tls_sb_ctx( ld->ld_sb );
 589         if ( ssl ) {
 590                 struct berval authid = { 0, NULL };
 591                 ber_len_t fac;
 592
 593                 fac = ldap_pvt_tls_get_strength( ssl );
 594                 /* failure is OK, we just can't use SASL EXTERNAL */
 595                 (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 596
 597                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 598                 LDAP_FREE( authid.bv_val );
 599         }
 600
 601         /* Check for local */
 602         if ( ldap_pvt_url_scheme2proto( ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC ) {
 603                 char authid[sizeof("uidNumber=4294967295+gidNumber=4294967295,"
 604                         "cn=peercred,cn=external,cn=auth")];
 605                 sprintf( authid, "uidNumber=%d+gidNumber=%d,"
 606                         "cn=peercred,cn=external,cn=auth",
 607                         (int) geteuid(), (int) getegid() );
 608                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid, LDAP_PVT_SASL_LOCAL_SSF );
 609         }
 610
 611         /* (re)set security properties */
 612         sasl_setprop( ctx, SASL_SEC_PROPS,
 613                 &ld->ld_options.ldo_sasl_secprops );
 614
 615         ccred.bv_val = NULL;
 616         ccred.bv_len = 0;
 617
 618         do {
 619                 saslrc = sasl_client_start( ctx,
 620                         mechs,
 621 #if SASL_VERSION_MAJOR < 2
 622                         NULL,
 623 #endif
 624                         &prompts,
 625                         (SASL_CONST char **)&ccred.bv_val,
 626                         &credlen,
 627                         &mech );
 628
 629                 if( pmech == NULL && mech != NULL ) {
 630                         pmech = mech;
 631
 632                         if( flags != LDAP_SASL_QUIET ) {
 633                                 fprintf(stderr,
 634                                         "SASL/%s authentication started\n",
 635                                         pmech );
 636                         }
 637                 }
 638
 639                 if( saslrc == SASL_INTERACT ) {
 640                         int res;
 641                         if( !interact ) break;
 642                         res = (interact)( ld, flags, defaults, prompts );
 643
 644                         if( res != LDAP_SUCCESS ) break;
 645                 }
 646         } while ( saslrc == SASL_INTERACT );
 647
 648         ccred.bv_len = credlen;
 649
 650         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 651                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 652 #if SASL_VERSION_MAJOR >= 2
 653                 ld->ld_error = (char *)sasl_errdetail( ctx );
 654 #endif
 655                 goto done;
 656         }
 657
 658         do {
 659                 struct berval *scred;
 660                 unsigned credlen;
 661
 662                 scred = NULL;
 663
 664                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 665
 666                 if ( ccred.bv_val != NULL ) {
 667 #if SASL_VERSION_MAJOR < 2
 668                         LDAP_FREE( ccred.bv_val );
 669 #endif
 670                         ccred.bv_val = NULL;
 671                 }
 672
 673                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 674                         if( scred && scred->bv_len ) {
 675                                 /* and server provided us with data? */
 676 #ifdef NEW_LOGGING
 677                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 678                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 679                                         rc, saslrc, scred->bv_len );
 680 #else
 681                                 Debug( LDAP_DEBUG_TRACE,
 682                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 683                                         rc, saslrc, scred->bv_len );
 684 #endif
 685                                 ber_bvfree( scred );
 686                         }
 687                         rc = ld->ld_errno;
 688                         goto done;
 689                 }
 690
 691                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 692                         /* we're done, no need to step */
 693                         if( scred && scred->bv_len ) {
 694                                 /* but server provided us with data! */
 695 #ifdef NEW_LOGGING
 696                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 697                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 698                                         rc, saslrc, scred->bv_len );
 699 #else
 700                                 Debug( LDAP_DEBUG_TRACE,
 701                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 702                                         rc, saslrc, scred->bv_len );
 703 #endif
 704                                 ber_bvfree( scred );
 705                                 rc = ld->ld_errno = LDAP_LOCAL_ERROR;
 706                                 goto done;
 707                         }
 708                         break;
 709                 }
 710
 711                 do {
 712                         saslrc = sasl_client_step( ctx,
 713                                 (scred == NULL) ? NULL : scred->bv_val,
 714                                 (scred == NULL) ? 0 : scred->bv_len,
 715                                 &prompts,
 716                                 (SASL_CONST char **)&ccred.bv_val,
 717                                 &credlen );
 718
 719 #ifdef NEW_LOGGING
 720                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 721                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc,0,0 );
 722 #else
 723                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 724                                 saslrc, 0, 0 );
 725 #endif
 726
 727                         if( saslrc == SASL_INTERACT ) {
 728                                 int res;
 729                                 if( !interact ) break;
 730                                 res = (interact)( ld, flags, defaults, prompts );
 731                                 if( res != LDAP_SUCCESS ) break;
 732                         }
 733                 } while ( saslrc == SASL_INTERACT );
 734
 735                 ccred.bv_len = credlen;
 736                 ber_bvfree( scred );
 737
 738                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 739                         ld->ld_errno = sasl_err2ldap( saslrc );
 740 #if SASL_VERSION_MAJOR >= 2
 741                         ld->ld_error = (char *)sasl_errdetail( ctx );
 742 #endif
 743                         rc = ld->ld_errno;
 744                         goto done;
 745                 }
 746         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 747
 748         if ( rc != LDAP_SUCCESS ) goto done;
 749
 750         if ( saslrc != SASL_OK ) {
 751 #if SASL_VERSION_MAJOR >= 2
 752                 ld->ld_error = (char *)sasl_errdetail( ctx );
 753 #endif
 754                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 755                 goto done;
 756         }
 757
 758         if( flags != LDAP_SASL_QUIET ) {
 759                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 760                 if( saslrc == SASL_OK && data && *data ) {
 761                         fprintf( stderr, "SASL username: %s\n", data );
 762                 }
 763
 764 #if SASL_VERSION_MAJOR < 2
 765                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 766                 if( saslrc == SASL_OK && data && *data ) {
 767                         fprintf( stderr, "SASL realm: %s\n", data );
 768                 }
 769 #endif
 770         }
 771
 772         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 773         if( saslrc == SASL_OK ) {
 774                 if( flags != LDAP_SASL_QUIET ) {
 775                         fprintf( stderr, "SASL SSF: %lu\n",
 776                                 (unsigned long) *ssf );
 777                 }
 778
 779                 if( ssf && *ssf ) {
 780                         if( flags != LDAP_SASL_QUIET ) {
 781                                 fprintf( stderr, "SASL installing layers\n" );
 782                         }
 783                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 784                 }
 785         }
 786
 787 done:
 788         return rc;
 789 }
 790
 791 int
 792 ldap_int_sasl_external(
 793         LDAP *ld,
 794         LDAPConn *conn,
 795         const char * authid,
 796         ber_len_t ssf )
 797 {
 798         int sc;
 799         sasl_conn_t *ctx;
 800 #if SASL_VERSION_MAJOR < 2
 801         sasl_external_properties_t extprops;
 802 #endif
 803
 804         ctx = conn->lconn_sasl_ctx;
 805
 806         if ( ctx == NULL ) {
 807                 return LDAP_LOCAL_ERROR;
 808         }
 809
 810 #if SASL_VERSION_MAJOR >= 2
 811         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 812         if ( sc == SASL_OK )
 813                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 814 #else
 815         memset( &extprops, '\0', sizeof(extprops) );
 816         extprops.ssf = ssf;
 817         extprops.auth_id = (char *) authid;
 818
 819         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 820                 (void *) &extprops );
 821 #endif
 822
 823         if ( sc != SASL_OK ) {
 824                 return LDAP_LOCAL_ERROR;
 825         }
 826
 827         return LDAP_SUCCESS;
 828 }
 829
 830
 831 int ldap_pvt_sasl_secprops(
 832         const char *in,
 833         sasl_security_properties_t *secprops )
 834 {
 835         int i;
 836         char **props = ldap_str2charray( in, "," );
 837         unsigned sflags = 0;
 838         int got_sflags = 0;
 839         sasl_ssf_t max_ssf = 0;
 840         int got_max_ssf = 0;
 841         sasl_ssf_t min_ssf = 0;
 842         int got_min_ssf = 0;
 843         unsigned maxbufsize = 0;
 844         int got_maxbufsize = 0;
 845
 846         if( props == NULL || secprops == NULL ) {
 847                 return LDAP_PARAM_ERROR;
 848         }
 849
 850         for( i=0; props[i]; i++ ) {
 851                 if( !strcasecmp(props[i], "none") ) {
 852                         got_sflags++;
 853
 854                 } else if( !strcasecmp(props[i], "noplain") ) {
 855                         got_sflags++;
 856                         sflags |= SASL_SEC_NOPLAINTEXT;
 857
 858                 } else if( !strcasecmp(props[i], "noactive") ) {
 859                         got_sflags++;
 860                         sflags |= SASL_SEC_NOACTIVE;
 861
 862                 } else if( !strcasecmp(props[i], "nodict") ) {
 863                         got_sflags++;
 864                         sflags |= SASL_SEC_NODICTIONARY;
 865
 866                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 867                         got_sflags++;
 868                         sflags |= SASL_SEC_FORWARD_SECRECY;
 869
 870                 } else if( !strcasecmp(props[i], "noanonymous")) {
 871                         got_sflags++;
 872                         sflags |= SASL_SEC_NOANONYMOUS;
 873
 874                 } else if( !strcasecmp(props[i], "passcred") ) {
 875                         got_sflags++;
 876                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 877
 878                 } else if( !strncasecmp(props[i],
 879                         "minssf=", sizeof("minssf")) )
 880                 {
 881                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 882                                 got_min_ssf++;
 883                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 884                         } else {
 885                                 return LDAP_NOT_SUPPORTED;
 886                         }
 887
 888                 } else if( !strncasecmp(props[i],
 889                         "maxssf=", sizeof("maxssf")) )
 890                 {
 891                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 892                                 got_max_ssf++;
 893                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 894                         } else {
 895                                 return LDAP_NOT_SUPPORTED;
 896                         }
 897
 898                 } else if( !strncasecmp(props[i],
 899                         "maxbufsize=", sizeof("maxbufsize")) )
 900                 {
 901                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 902                                 got_maxbufsize++;
 903                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 904                         } else {
 905                                 return LDAP_NOT_SUPPORTED;
 906                         }
 907
 908                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 909                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 910                         {
 911                                 /* bad maxbufsize */
 912                                 return LDAP_PARAM_ERROR;
 913                         }
 914
 915                 } else {
 916                         return LDAP_NOT_SUPPORTED;
 917                 }
 918         }
 919
 920         if(got_sflags) {
 921                 secprops->security_flags = sflags;
 922         }
 923         if(got_min_ssf) {
 924                 secprops->min_ssf = min_ssf;
 925         }
 926         if(got_max_ssf) {
 927                 secprops->max_ssf = max_ssf;
 928         }
 929         if(got_maxbufsize) {
 930                 secprops->maxbufsize = maxbufsize;
 931         }
 932
 933         ldap_charray_free( props );
 934         return LDAP_SUCCESS;
 935 }
 936
 937 int
 938 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 939 {
 940         int rc;
 941
 942         switch( option ) {
 943         case LDAP_OPT_X_SASL_SECPROPS:
 944                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 945                 if( rc == LDAP_SUCCESS ) return 0;
 946         }
 947
 948         return -1;
 949 }
 950
 951 int
 952 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 953 {
 954         if ( ld == NULL )
 955                 return -1;
 956
 957         switch ( option ) {
 958                 case LDAP_OPT_X_SASL_MECH: {
 959                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 960                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 961                 } break;
 962                 case LDAP_OPT_X_SASL_REALM: {
 963                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 964                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 965                 } break;
 966                 case LDAP_OPT_X_SASL_AUTHCID: {
 967                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 968                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 969                 } break;
 970                 case LDAP_OPT_X_SASL_AUTHZID: {
 971                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 972                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 973                 } break;
 974
 975                 case LDAP_OPT_X_SASL_SSF: {
 976                         int sc;
 977                         sasl_ssf_t      *ssf;
 978                         sasl_conn_t *ctx;
 979
 980                         if( ld->ld_defconn == NULL ) {
 981                                 return -1;
 982                         }
 983
 984                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 985
 986                         if ( ctx == NULL ) {
 987                                 return -1;
 988                         }
 989
 990                         sc = sasl_getprop( ctx, SASL_SSF,
 991                                 (SASL_CONST void **) &ssf );
 992
 993                         if ( sc != SASL_OK ) {
 994                                 return -1;
 995                         }
 996
 997                         *(ber_len_t *)arg = *ssf;
 998                 } break;
 999
1000                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
1001                         /* this option is write only */
1002                         return -1;
1003
1004                 case LDAP_OPT_X_SASL_SSF_MIN:
1005                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
1006                         break;
1007                 case LDAP_OPT_X_SASL_SSF_MAX:
1008                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
1009                         break;
1010                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1011                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1012                         break;
1013
1014                 case LDAP_OPT_X_SASL_SECPROPS:
1015                         /* this option is write only */
1016                         return -1;
1017
1018                 default:
1019                         return -1;
1020         }
1021         return 0;
1022 }
1023
1024 int
1025 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1026 {
1027         if ( ld == NULL )
1028                 return -1;
1029
1030         switch ( option ) {
1031         case LDAP_OPT_X_SASL_SSF:
1032                 /* This option is read-only */
1033                 return -1;
1034
1035         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1036                 int sc;
1037 #if SASL_VERSION_MAJOR < 2
1038                 sasl_external_properties_t extprops;
1039 #endif
1040                 sasl_conn_t *ctx;
1041
1042                 if( ld->ld_defconn == NULL ) {
1043                         return -1;
1044                 }
1045
1046                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1047
1048                 if ( ctx == NULL ) {
1049                         return -1;
1050                 }
1051
1052 #if SASL_VERSION_MAJOR >= 2
1053                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1054 #else
1055                 memset(&extprops, 0L, sizeof(extprops));
1056
1057                 extprops.ssf = * (ber_len_t *) arg;
1058
1059                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1060                         (void *) &extprops );
1061 #endif
1062
1063                 if ( sc != SASL_OK ) {
1064                         return -1;
1065                 }
1066                 } break;
1067
1068         case LDAP_OPT_X_SASL_SSF_MIN:
1069                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1070                 break;
1071         case LDAP_OPT_X_SASL_SSF_MAX:
1072                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1073                 break;
1074         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1075                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1076                 break;
1077
1078         case LDAP_OPT_X_SASL_SECPROPS: {
1079                 int sc;
1080                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1081                         &ld->ld_options.ldo_sasl_secprops );
1082
1083                 return sc == LDAP_SUCCESS ? 0 : -1;
1084                 }
1085
1086         default:
1087                 return -1;
1088         }
1089         return 0;
1090 }
1091
1092 #ifdef LDAP_R_COMPILE
1093 #define LDAP_DEBUG_R_SASL
1094 void *ldap_pvt_sasl_mutex_new(void)
1095 {
1096         ldap_pvt_thread_mutex_t *mutex;
1097
1098         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1099                 sizeof(ldap_pvt_thread_mutex_t) );
1100
1101         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1102                 return mutex;
1103         }
1104 #ifndef LDAP_DEBUG_R_SASL
1105         assert( 0 );
1106 #endif /* !LDAP_DEBUG_R_SASL */
1107         return NULL;
1108 }
1109
1110 int ldap_pvt_sasl_mutex_lock(void *mutex)
1111 {
1112 #ifdef LDAP_DEBUG_R_SASL
1113         if ( mutex == NULL ) {
1114                 return SASL_OK;
1115         }
1116 #else /* !LDAP_DEBUG_R_SASL */
1117         assert( mutex );
1118 #endif /* !LDAP_DEBUG_R_SASL */
1119         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1120                 ? SASL_FAIL : SASL_OK;
1121 }
1122
1123 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1124 {
1125 #ifdef LDAP_DEBUG_R_SASL
1126         if ( mutex == NULL ) {
1127                 return SASL_OK;
1128         }
1129 #else /* !LDAP_DEBUG_R_SASL */
1130         assert( mutex );
1131 #endif /* !LDAP_DEBUG_R_SASL */
1132         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1133                 ? SASL_FAIL : SASL_OK;
1134 }
1135
1136 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1137 {
1138 #ifdef LDAP_DEBUG_R_SASL
1139         if ( mutex == NULL ) {
1140                 return;
1141         }
1142 #else /* !LDAP_DEBUG_R_SASL */
1143         assert( mutex );
1144 #endif /* !LDAP_DEBUG_R_SASL */
1145         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1146         LDAP_FREE( mutex );
1147 }
1148 #endif
1149
1150 #else
1151 int ldap_int_sasl_init( void )
1152 { return LDAP_SUCCESS; }
1153
1154 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1155 { return LDAP_SUCCESS; }
1156
1157 int
1158 ldap_int_sasl_bind(
1159         LDAP                    *ld,
1160         const char              *dn,
1161         const char              *mechs,
1162         LDAPControl             **sctrls,
1163         LDAPControl             **cctrls,
1164         unsigned                flags,
1165         LDAP_SASL_INTERACT_PROC *interact,
1166         void * defaults )
1167 { return LDAP_NOT_SUPPORTED; }
1168
1169 int
1170 ldap_int_sasl_external(
1171         LDAP *ld,
1172         LDAPConn *conn,
1173         const char * authid,
1174         ber_len_t ssf )
1175 { return LDAP_SUCCESS; }
1176
1177 #endif /* HAVE_CYRUS_SASL */