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         /* stringify the version number, sasl.h doesn't do it for us */
  61 #define VSTR0(maj, min, pat)    #maj "." #min "." #pat
  62 #define VSTR(maj, min, pat)     VSTR0(maj, min, pat)
  63 #define SASL_VERSION_STRING     VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
  64                                 SASL_VERSION_STEP)
  65         { int rc;
  66         sasl_version( NULL, &rc );
  67         if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
  68                 (rc & 0xffff) < SASL_VERSION_STEP) {
  69                 char version[sizeof("xxx.xxx.xxxxx")];
  70                 sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
  71                         rc & 0xffff );
  72
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG( TRANSPORT, INFO,
  75                 "ldap_int_sasl_init: SASL library version mismatch:"
  76                 " expected " SASL_VERSION_STRING ","
  77                 " got %s\n", version, 0, 0 );
  78 #else
  79                 Debug( LDAP_DEBUG_ANY,
  80                 "ldap_int_sasl_init: SASL library version mismatch:"
  81                 " expected " SASL_VERSION_STRING ","
  82                 " got %s\n", version, 0, 0 );
  83 #endif
  84                 return -1;
  85         }
  86         }
  87 #endif
  88         if ( sasl_initialized ) {
  89                 return 0;
  90         }
  91
  92 /* SASL 2 takes care of its own memory completely internally */
  93 #if SASL_VERSION_MAJOR < 2 && !defined(CSRIMALLOC)
  94         sasl_set_alloc(
  95                 ber_memalloc,
  96                 ber_memcalloc,
  97                 ber_memrealloc,
  98                 ber_memfree );
  99 #endif /* CSRIMALLOC */
 100
 101 #ifdef LDAP_R_COMPILE
 102         sasl_set_mutex(
 103                 ldap_pvt_sasl_mutex_new,
 104                 ldap_pvt_sasl_mutex_lock,
 105                 ldap_pvt_sasl_mutex_unlock,
 106                 ldap_pvt_sasl_mutex_dispose );
 107
 108         ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
 109 #endif
 110
 111         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
 112                 sasl_initialized = 1;
 113                 return 0;
 114         }
 115
 116 #if SASL_VERSION_MAJOR < 2
 117         /* A no-op to make sure we link with Cyrus 1.5 */
 118         sasl_client_auth( NULL, NULL, NULL, 0, NULL, NULL );
 119 #endif
 120         return -1;
 121 }
 122
 123 /*
 124  * SASL encryption support for LBER Sockbufs
 125  */
 126
 127 struct sb_sasl_data {
 128         sasl_conn_t             *sasl_context;
 129         unsigned                *sasl_maxbuf;
 130         Sockbuf_Buf             sec_buf_in;
 131         Sockbuf_Buf             buf_in;
 132         Sockbuf_Buf             buf_out;
 133 };
 134
 135 static int
 136 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
 137 {
 138         struct sb_sasl_data     *p;
 139
 140         assert( sbiod != NULL );
 141
 142         p = LBER_MALLOC( sizeof( *p ) );
 143         if ( p == NULL )
 144                 return -1;
 145         p->sasl_context = (sasl_conn_t *)arg;
 146         ber_pvt_sb_buf_init( &p->sec_buf_in );
 147         ber_pvt_sb_buf_init( &p->buf_in );
 148         ber_pvt_sb_buf_init( &p->buf_out );
 149         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 150                 LBER_FREE( p );
 151                 errno = ENOMEM;
 152                 return -1;
 153         }
 154         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF,
 155                 (SASL_CONST void **) &p->sasl_maxbuf );
 156
 157         if ( p->sasl_maxbuf == 0 )
 158                 p->sasl_maxbuf = SASL_MAX_BUFF_SIZE;
 159
 160         sbiod->sbiod_pvt = p;
 161
 162         return 0;
 163 }
 164
 165 static int
 166 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 167 {
 168         struct sb_sasl_data     *p;
 169
 170         assert( sbiod != NULL );
 171
 172         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 173 #if SASL_VERSION_MAJOR >= 2
 174         /*
 175          * SASLv2 encode/decode buffers are managed by
 176          * libsasl2. Ensure they are not freed by liblber.
 177          */
 178         p->buf_in.buf_base = NULL;
 179         p->buf_out.buf_base = NULL;
 180 #endif
 181         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 182         ber_pvt_sb_buf_destroy( &p->buf_in );
 183         ber_pvt_sb_buf_destroy( &p->buf_out );
 184         LBER_FREE( p );
 185         sbiod->sbiod_pvt = NULL;
 186         return 0;
 187 }
 188
 189 static ber_len_t
 190 sb_sasl_pkt_length( const unsigned char *buf, unsigned max, int debuglevel )
 191 {
 192         ber_len_t               size;
 193
 194         assert( buf != NULL );
 195
 196         size = buf[0] << 24
 197                 | buf[1] << 16
 198                 | buf[2] << 8
 199                 | buf[3];
 200
 201         if ( size > SASL_MAX_BUFF_SIZE ) {
 202                 /* somebody is trying to mess me up. */
 203                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 204                         "sb_sasl_pkt_length: received illegal packet length "
 205                         "of %lu bytes\n", (unsigned long)size );
 206                 size = 16; /* this should lead to an error. */
 207         }
 208
 209         return size + 4; /* include the size !!! */
 210 }
 211
 212 /* Drop a processed packet from the input buffer */
 213 static void
 214 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, unsigned max, int debuglevel )
 215 {
 216         ber_slen_t                      len;
 217
 218         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 219         if ( len > 0 )
 220                 AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
 221                         sec_buf_in->buf_end, len );
 222
 223         if ( len >= 4 ) {
 224                 sec_buf_in->buf_end = sb_sasl_pkt_length(
 225                         (unsigned char *) sec_buf_in->buf_base, max, debuglevel);
 226         }
 227         else {
 228                 sec_buf_in->buf_end = 0;
 229         }
 230         sec_buf_in->buf_ptr = len;
 231 }
 232
 233 static ber_slen_t
 234 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 235 {
 236         struct sb_sasl_data     *p;
 237         ber_slen_t              ret, bufptr;
 238
 239         assert( sbiod != NULL );
 240         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 241
 242         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 243
 244         /* Are there anything left in the buffer? */
 245         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 246         bufptr = ret;
 247         len -= ret;
 248
 249         if ( len == 0 )
 250                 return bufptr;
 251
 252 #if SASL_VERSION_MAJOR >= 2
 253         ber_pvt_sb_buf_init( &p->buf_in );
 254 #else
 255         ber_pvt_sb_buf_destroy( &p->buf_in );
 256 #endif
 257
 258         /* Read the length of the packet */
 259         while ( p->sec_buf_in.buf_ptr < 4 ) {
 260                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 261                         4 - p->sec_buf_in.buf_ptr );
 262 #ifdef EINTR
 263                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 264                         continue;
 265 #endif
 266                 if ( ret <= 0 )
 267                         return bufptr ? bufptr : ret;
 268
 269                 p->sec_buf_in.buf_ptr += ret;
 270         }
 271
 272         /* The new packet always starts at p->sec_buf_in.buf_base */
 273         ret = sb_sasl_pkt_length( (unsigned char *) p->sec_buf_in.buf_base,
 274                 *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 275
 276         /* Grow the packet buffer if neccessary */
 277         if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
 278                 ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 )
 279         {
 280                 errno = ENOMEM;
 281                 return -1;
 282         }
 283         p->sec_buf_in.buf_end = ret;
 284
 285         /* Did we read the whole encrypted packet? */
 286         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 287                 /* No, we have got only a part of it */
 288                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 289
 290                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 291                         p->sec_buf_in.buf_ptr, ret );
 292 #ifdef EINTR
 293                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 294                         continue;
 295 #endif
 296                 if ( ret <= 0 )
 297                         return bufptr ? bufptr : ret;
 298
 299                 p->sec_buf_in.buf_ptr += ret;
 300         }
 301
 302         /* Decode the packet */
 303         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 304                 p->sec_buf_in.buf_end,
 305                 (SASL_CONST char **)&p->buf_in.buf_base,
 306                 (unsigned *)&p->buf_in.buf_end );
 307
 308         /* Drop the packet from the input buffer */
 309         sb_sasl_drop_packet( &p->sec_buf_in,
 310                         *p->sasl_maxbuf, sbiod->sbiod_sb->sb_debug );
 311
 312         if ( ret != SASL_OK ) {
 313                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 314                         "sb_sasl_read: failed to decode packet: %s\n",
 315                         sasl_errstring( ret, NULL, NULL ) );
 316                 errno = EIO;
 317                 return -1;
 318         }
 319
 320         p->buf_in.buf_size = p->buf_in.buf_end;
 321
 322         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 323
 324         return bufptr;
 325 }
 326
 327 static ber_slen_t
 328 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 329 {
 330         struct sb_sasl_data     *p;
 331         int                     ret;
 332
 333         assert( sbiod != NULL );
 334         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 335
 336         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 337
 338         /* Are there anything left in the buffer? */
 339         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 340                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 341                 if ( ret < 0 )
 342                         return ret;
 343                 /* Still have something left?? */
 344                 if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 345                         errno = EAGAIN;
 346                         return 0;
 347                 }
 348         }
 349
 350         /* now encode the next packet. */
 351 #if SASL_VERSION_MAJOR >= 2
 352         ber_pvt_sb_buf_init( &p->buf_out );
 353         /* sasl v2 makes sure this number is correct */
 354         if ( len > *p->sasl_maxbuf )
 355                 len = *p->sasl_maxbuf;
 356 #else
 357         ber_pvt_sb_buf_destroy( &p->buf_out );
 358         if ( len > *p->sasl_maxbuf - 100 )
 359                 len = *p->sasl_maxbuf - 100;    /* For safety margin */
 360 #endif
 361         ret = sasl_encode( p->sasl_context, buf, len,
 362                 (SASL_CONST char **)&p->buf_out.buf_base,
 363                 (unsigned *)&p->buf_out.buf_size );
 364         if ( ret != SASL_OK ) {
 365                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 366                         "sb_sasl_write: failed to encode packet: %s\n",
 367                         sasl_errstring( ret, NULL, NULL ) );
 368                 return -1;
 369         }
 370         p->buf_out.buf_end = p->buf_out.buf_size;
 371
 372         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 373         if ( ret <= 0 )
 374                 return ret;
 375         return len;
 376 }
 377
 378 static int
 379 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 380 {
 381         struct sb_sasl_data     *p;
 382
 383         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 384
 385         if ( opt == LBER_SB_OPT_DATA_READY ) {
 386                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 387                         return 1;
 388         }
 389
 390         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 391 }
 392
 393 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 394         sb_sasl_setup,          /* sbi_setup */
 395         sb_sasl_remove,         /* sbi_remove */
 396         sb_sasl_ctrl,           /* sbi_ctrl */
 397         sb_sasl_read,           /* sbi_read */
 398         sb_sasl_write,          /* sbi_write */
 399         NULL                    /* sbi_close */
 400 };
 401
 402 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 403 {
 404 #ifdef NEW_LOGGING
 405         LDAP_LOG ( TRANSPORT, ENTRY, "ldap_pvt_sasl_install\n", 0, 0, 0 );
 406 #else
 407         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 408                 0, 0, 0 );
 409 #endif
 410
 411         /* don't install the stuff unless security has been negotiated */
 412
 413         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 414                         &ldap_pvt_sockbuf_io_sasl ) )
 415         {
 416 #ifdef LDAP_DEBUG
 417                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 418                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 419 #endif
 420                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 421                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 422         }
 423
 424         return LDAP_SUCCESS;
 425 }
 426
 427 void ldap_pvt_sasl_remove( Sockbuf *sb )
 428 {
 429         ber_sockbuf_remove_io( sb, &ldap_pvt_sockbuf_io_sasl,
 430                 LBER_SBIOD_LEVEL_APPLICATION );
 431 #ifdef LDAP_DEBUG
 432         ber_sockbuf_remove_io( sb, &ber_sockbuf_io_debug,
 433                 LBER_SBIOD_LEVEL_APPLICATION );
 434 #endif
 435 }
 436
 437 static int
 438 sasl_err2ldap( int saslerr )
 439 {
 440         int rc;
 441
 442         switch (saslerr) {
 443                 case SASL_CONTINUE:
 444                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 445                         break;
 446                 case SASL_INTERACT:
 447                         rc = LDAP_LOCAL_ERROR;
 448                         break;
 449                 case SASL_OK:
 450                         rc = LDAP_SUCCESS;
 451                         break;
 452                 case SASL_FAIL:
 453                         rc = LDAP_LOCAL_ERROR;
 454                         break;
 455                 case SASL_NOMEM:
 456                         rc = LDAP_NO_MEMORY;
 457                         break;
 458                 case SASL_NOMECH:
 459                         rc = LDAP_AUTH_UNKNOWN;
 460                         break;
 461                 case SASL_BADAUTH:
 462                         rc = LDAP_AUTH_UNKNOWN;
 463                         break;
 464                 case SASL_NOAUTHZ:
 465                         rc = LDAP_PARAM_ERROR;
 466                         break;
 467                 case SASL_TOOWEAK:
 468                 case SASL_ENCRYPT:
 469                         rc = LDAP_AUTH_UNKNOWN;
 470                         break;
 471                 default:
 472                         rc = LDAP_LOCAL_ERROR;
 473                         break;
 474         }
 475
 476         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 477         return rc;
 478 }
 479
 480 int
 481 ldap_int_sasl_open(
 482         LDAP *ld,
 483         LDAPConn *lc,
 484         const char * host )
 485 {
 486         int rc;
 487         sasl_conn_t *ctx;
 488
 489         assert( lc->lconn_sasl_authctx == NULL );
 490
 491         if ( host == NULL ) {
 492                 ld->ld_errno = LDAP_LOCAL_ERROR;
 493                 return ld->ld_errno;
 494         }
 495
 496 #if SASL_VERSION_MAJOR >= 2
 497         rc = sasl_client_new( "ldap", host, NULL, NULL,
 498                 NULL, 0, &ctx );
 499 #else
 500         rc = sasl_client_new( "ldap", host, NULL,
 501                 SASL_SECURITY_LAYER, &ctx );
 502 #endif
 503
 504         if ( rc != SASL_OK ) {
 505                 ld->ld_errno = sasl_err2ldap( rc );
 506                 return ld->ld_errno;
 507         }
 508
 509 #ifdef NEW_LOGGING
 510         LDAP_LOG ( TRANSPORT, DETAIL1, "ldap_int_sasl_open: host=%s\n",
 511                 host, 0, 0 );
 512 #else
 513         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 514                 host, 0, 0 );
 515 #endif
 516
 517         lc->lconn_sasl_authctx = ctx;
 518
 519         return LDAP_SUCCESS;
 520 }
 521
 522 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 523 {
 524         sasl_conn_t *ctx = lc->lconn_sasl_authctx;
 525
 526         if( ctx != NULL ) {
 527                 sasl_dispose( &ctx );
 528                 if ( lc->lconn_sasl_sockctx &&
 529                         lc->lconn_sasl_authctx != lc->lconn_sasl_sockctx ) {
 530                         ctx = lc->lconn_sasl_sockctx;
 531                         sasl_dispose( &ctx );
 532                 }
 533                 lc->lconn_sasl_sockctx = NULL;
 534                 lc->lconn_sasl_authctx = NULL;
 535         }
 536
 537         return LDAP_SUCCESS;
 538 }
 539
 540 int
 541 ldap_int_sasl_bind(
 542         LDAP                    *ld,
 543         const char              *dn,
 544         const char              *mechs,
 545         LDAPControl             **sctrls,
 546         LDAPControl             **cctrls,
 547         unsigned                flags,
 548         LDAP_SASL_INTERACT_PROC *interact,
 549         void * defaults )
 550 {
 551         char *data;
 552         const char *mech = NULL;
 553         const char *pmech = NULL;
 554         int                     saslrc, rc;
 555         sasl_ssf_t              *ssf = NULL;
 556         sasl_conn_t     *ctx, *oldctx = NULL;
 557         sasl_interact_t *prompts = NULL;
 558         unsigned credlen;
 559         struct berval ccred;
 560         ber_socket_t            sd;
 561         void    *ssl;
 562
 563 #ifdef NEW_LOGGING
 564         LDAP_LOG ( TRANSPORT, ARGS, "ldap_int_sasl_bind: %s\n",
 565                 mechs ? mechs : "<null>", 0, 0 );
 566 #else
 567         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 568                 mechs ? mechs : "<null>", 0, 0 );
 569 #endif
 570
 571         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 572         if (ld->ld_version < LDAP_VERSION3) {
 573                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 574                 return ld->ld_errno;
 575         }
 576
 577         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 578
 579         if ( sd == AC_SOCKET_INVALID ) {
 580                 /* not connected yet */
 581                 int rc;
 582
 583                 rc = ldap_open_defconn( ld );
 584                 if( rc < 0 ) return ld->ld_errno;
 585
 586                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 587
 588                 if( sd == AC_SOCKET_INVALID ) {
 589                         ld->ld_errno = LDAP_LOCAL_ERROR;
 590                         return ld->ld_errno;
 591                 }
 592         }
 593
 594         oldctx = ld->ld_defconn->lconn_sasl_authctx;
 595
 596         /* If we already have an authentication context, clear it out */
 597         if( oldctx ) {
 598                 if ( oldctx != ld->ld_defconn->lconn_sasl_sockctx ) {
 599                         sasl_dispose( &oldctx );
 600                 }
 601                 ld->ld_defconn->lconn_sasl_authctx = NULL;
 602         }
 603
 604         rc = ldap_int_sasl_open( ld, ld->ld_defconn,
 605                 ld->ld_defconn->lconn_server->lud_host ?
 606                 ld->ld_defconn->lconn_server->lud_host : "localhost" );
 607
 608         if ( rc != LDAP_SUCCESS ) return rc;
 609
 610         ctx = ld->ld_defconn->lconn_sasl_authctx;
 611
 612         /* Check for TLS */
 613         ssl = ldap_pvt_tls_sb_ctx( ld->ld_sb );
 614         if ( ssl ) {
 615                 struct berval authid = { 0, NULL };
 616                 ber_len_t fac;
 617
 618                 fac = ldap_pvt_tls_get_strength( ssl );
 619                 /* failure is OK, we just can't use SASL EXTERNAL */
 620                 (void) ldap_pvt_tls_get_my_dn( ssl, &authid, NULL, 0 );
 621
 622                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid.bv_val, fac );
 623                 LDAP_FREE( authid.bv_val );
 624         }
 625
 626         /* Check for local */
 627         if ( ldap_pvt_url_scheme2proto( ld->ld_defconn->lconn_server->lud_scheme ) == LDAP_PROTO_IPC ) {
 628                 char authid[sizeof("uidNumber=4294967295+gidNumber=4294967295,"
 629                         "cn=peercred,cn=external,cn=auth")];
 630                 sprintf( authid, "uidNumber=%d+gidNumber=%d,"
 631                         "cn=peercred,cn=external,cn=auth",
 632                         (int) geteuid(), (int) getegid() );
 633                 (void) ldap_int_sasl_external( ld, ld->ld_defconn, authid, LDAP_PVT_SASL_LOCAL_SSF );
 634         }
 635
 636         /* (re)set security properties */
 637         sasl_setprop( ctx, SASL_SEC_PROPS,
 638                 &ld->ld_options.ldo_sasl_secprops );
 639
 640         ccred.bv_val = NULL;
 641         ccred.bv_len = 0;
 642
 643         do {
 644                 saslrc = sasl_client_start( ctx,
 645                         mechs,
 646 #if SASL_VERSION_MAJOR < 2
 647                         NULL,
 648 #endif
 649                         &prompts,
 650                         (SASL_CONST char **)&ccred.bv_val,
 651                         &credlen,
 652                         &mech );
 653
 654                 if( pmech == NULL && mech != NULL ) {
 655                         pmech = mech;
 656
 657                         if( flags != LDAP_SASL_QUIET ) {
 658                                 fprintf(stderr,
 659                                         "SASL/%s authentication started\n",
 660                                         pmech );
 661                         }
 662                 }
 663
 664                 if( saslrc == SASL_INTERACT ) {
 665                         int res;
 666                         if( !interact ) break;
 667                         res = (interact)( ld, flags, defaults, prompts );
 668
 669                         if( res != LDAP_SUCCESS ) break;
 670                 }
 671         } while ( saslrc == SASL_INTERACT );
 672
 673         ccred.bv_len = credlen;
 674
 675         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 676                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 677 #if SASL_VERSION_MAJOR >= 2
 678                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 679 #endif
 680                 goto done;
 681         }
 682
 683         do {
 684                 struct berval *scred;
 685                 unsigned credlen;
 686
 687                 scred = NULL;
 688
 689                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 690
 691                 if ( ccred.bv_val != NULL ) {
 692 #if SASL_VERSION_MAJOR < 2
 693                         LDAP_FREE( ccred.bv_val );
 694 #endif
 695                         ccred.bv_val = NULL;
 696                 }
 697
 698                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 699                         if( scred && scred->bv_len ) {
 700                                 /* and server provided us with data? */
 701 #ifdef NEW_LOGGING
 702                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 703                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 704                                         rc, saslrc, scred->bv_len );
 705 #else
 706                                 Debug( LDAP_DEBUG_TRACE,
 707                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 708                                         rc, saslrc, scred->bv_len );
 709 #endif
 710                                 ber_bvfree( scred );
 711                         }
 712                         rc = ld->ld_errno;
 713                         goto done;
 714                 }
 715
 716                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 717                         /* we're done, no need to step */
 718                         if( scred && scred->bv_len ) {
 719                                 /* but server provided us with data! */
 720 #ifdef NEW_LOGGING
 721                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 722                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 723                                         rc, saslrc, scred->bv_len );
 724 #else
 725                                 Debug( LDAP_DEBUG_TRACE,
 726                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 727                                         rc, saslrc, scred->bv_len );
 728 #endif
 729                                 ber_bvfree( scred );
 730                                 rc = ld->ld_errno = LDAP_LOCAL_ERROR;
 731                                 goto done;
 732                         }
 733                         break;
 734                 }
 735
 736                 do {
 737                         saslrc = sasl_client_step( ctx,
 738                                 (scred == NULL) ? NULL : scred->bv_val,
 739                                 (scred == NULL) ? 0 : scred->bv_len,
 740                                 &prompts,
 741                                 (SASL_CONST char **)&ccred.bv_val,
 742                                 &credlen );
 743
 744 #ifdef NEW_LOGGING
 745                                 LDAP_LOG ( TRANSPORT, DETAIL1,
 746                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc,0,0 );
 747 #else
 748                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 749                                 saslrc, 0, 0 );
 750 #endif
 751
 752                         if( saslrc == SASL_INTERACT ) {
 753                                 int res;
 754                                 if( !interact ) break;
 755                                 res = (interact)( ld, flags, defaults, prompts );
 756                                 if( res != LDAP_SUCCESS ) break;
 757                         }
 758                 } while ( saslrc == SASL_INTERACT );
 759
 760                 ccred.bv_len = credlen;
 761                 ber_bvfree( scred );
 762
 763                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 764                         ld->ld_errno = sasl_err2ldap( saslrc );
 765 #if SASL_VERSION_MAJOR >= 2
 766                         ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 767 #endif
 768                         rc = ld->ld_errno;
 769                         goto done;
 770                 }
 771         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 772
 773         if ( rc != LDAP_SUCCESS ) goto done;
 774
 775         if ( saslrc != SASL_OK ) {
 776 #if SASL_VERSION_MAJOR >= 2
 777                 ld->ld_error = LDAP_STRDUP( sasl_errdetail( ctx ) );
 778 #endif
 779                 rc = ld->ld_errno = sasl_err2ldap( saslrc );
 780                 goto done;
 781         }
 782
 783         if( flags != LDAP_SASL_QUIET ) {
 784                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 785                 if( saslrc == SASL_OK && data && *data ) {
 786                         fprintf( stderr, "SASL username: %s\n", data );
 787                 }
 788
 789 #if SASL_VERSION_MAJOR < 2
 790                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 791                 if( saslrc == SASL_OK && data && *data ) {
 792                         fprintf( stderr, "SASL realm: %s\n", data );
 793                 }
 794 #endif
 795         }
 796
 797         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 798         if( saslrc == SASL_OK ) {
 799                 if( flags != LDAP_SASL_QUIET ) {
 800                         fprintf( stderr, "SASL SSF: %lu\n",
 801                                 (unsigned long) *ssf );
 802                 }
 803
 804                 if( ssf && *ssf ) {
 805                         if( flags != LDAP_SASL_QUIET ) {
 806                                 fprintf( stderr, "SASL installing layers\n" );
 807                         }
 808                         if ( ld->ld_defconn->lconn_sasl_sockctx ) {
 809                                 oldctx = ld->ld_defconn->lconn_sasl_sockctx;
 810                                 sasl_dispose( &oldctx );
 811                                 ldap_pvt_sasl_remove( ld->ld_sb );
 812                         }
 813                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 814                         ld->ld_defconn->lconn_sasl_sockctx = ctx;
 815                 }
 816         }
 817         ld->ld_defconn->lconn_sasl_authctx = ctx;
 818
 819 done:
 820         return rc;
 821 }
 822
 823 int
 824 ldap_int_sasl_external(
 825         LDAP *ld,
 826         LDAPConn *conn,
 827         const char * authid,
 828         ber_len_t ssf )
 829 {
 830         int sc;
 831         sasl_conn_t *ctx;
 832 #if SASL_VERSION_MAJOR < 2
 833         sasl_external_properties_t extprops;
 834 #endif
 835
 836         ctx = conn->lconn_sasl_authctx;
 837
 838         if ( ctx == NULL ) {
 839                 return LDAP_LOCAL_ERROR;
 840         }
 841
 842 #if SASL_VERSION_MAJOR >= 2
 843         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 844         if ( sc == SASL_OK )
 845                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 846 #else
 847         memset( &extprops, '\0', sizeof(extprops) );
 848         extprops.ssf = ssf;
 849         extprops.auth_id = (char *) authid;
 850
 851         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 852                 (void *) &extprops );
 853 #endif
 854
 855         if ( sc != SASL_OK ) {
 856                 return LDAP_LOCAL_ERROR;
 857         }
 858
 859         return LDAP_SUCCESS;
 860 }
 861
 862
 863 int ldap_pvt_sasl_secprops(
 864         const char *in,
 865         sasl_security_properties_t *secprops )
 866 {
 867         int i;
 868         char **props = ldap_str2charray( in, "," );
 869         unsigned sflags = 0;
 870         int got_sflags = 0;
 871         sasl_ssf_t max_ssf = 0;
 872         int got_max_ssf = 0;
 873         sasl_ssf_t min_ssf = 0;
 874         int got_min_ssf = 0;
 875         unsigned maxbufsize = 0;
 876         int got_maxbufsize = 0;
 877
 878         if( props == NULL || secprops == NULL ) {
 879                 return LDAP_PARAM_ERROR;
 880         }
 881
 882         for( i=0; props[i]; i++ ) {
 883                 if( !strcasecmp(props[i], "none") ) {
 884                         got_sflags++;
 885
 886                 } else if( !strcasecmp(props[i], "noplain") ) {
 887                         got_sflags++;
 888                         sflags |= SASL_SEC_NOPLAINTEXT;
 889
 890                 } else if( !strcasecmp(props[i], "noactive") ) {
 891                         got_sflags++;
 892                         sflags |= SASL_SEC_NOACTIVE;
 893
 894                 } else if( !strcasecmp(props[i], "nodict") ) {
 895                         got_sflags++;
 896                         sflags |= SASL_SEC_NODICTIONARY;
 897
 898                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 899                         got_sflags++;
 900                         sflags |= SASL_SEC_FORWARD_SECRECY;
 901
 902                 } else if( !strcasecmp(props[i], "noanonymous")) {
 903                         got_sflags++;
 904                         sflags |= SASL_SEC_NOANONYMOUS;
 905
 906                 } else if( !strcasecmp(props[i], "passcred") ) {
 907                         got_sflags++;
 908                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 909
 910                 } else if( !strncasecmp(props[i],
 911                         "minssf=", sizeof("minssf")) )
 912                 {
 913                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 914                                 got_min_ssf++;
 915                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 916                         } else {
 917                                 return LDAP_NOT_SUPPORTED;
 918                         }
 919
 920                 } else if( !strncasecmp(props[i],
 921                         "maxssf=", sizeof("maxssf")) )
 922                 {
 923                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 924                                 got_max_ssf++;
 925                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 926                         } else {
 927                                 return LDAP_NOT_SUPPORTED;
 928                         }
 929
 930                 } else if( !strncasecmp(props[i],
 931                         "maxbufsize=", sizeof("maxbufsize")) )
 932                 {
 933                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 934                                 got_maxbufsize++;
 935                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 936                         } else {
 937                                 return LDAP_NOT_SUPPORTED;
 938                         }
 939
 940                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 941                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 942                         {
 943                                 /* bad maxbufsize */
 944                                 return LDAP_PARAM_ERROR;
 945                         }
 946
 947                 } else {
 948                         return LDAP_NOT_SUPPORTED;
 949                 }
 950         }
 951
 952         if(got_sflags) {
 953                 secprops->security_flags = sflags;
 954         }
 955         if(got_min_ssf) {
 956                 secprops->min_ssf = min_ssf;
 957         }
 958         if(got_max_ssf) {
 959                 secprops->max_ssf = max_ssf;
 960         }
 961         if(got_maxbufsize) {
 962                 secprops->maxbufsize = maxbufsize;
 963         }
 964
 965         ldap_charray_free( props );
 966         return LDAP_SUCCESS;
 967 }
 968
 969 int
 970 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 971 {
 972         int rc;
 973
 974         switch( option ) {
 975         case LDAP_OPT_X_SASL_SECPROPS:
 976                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 977                 if( rc == LDAP_SUCCESS ) return 0;
 978         }
 979
 980         return -1;
 981 }
 982
 983 int
 984 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 985 {
 986         if ( ld == NULL )
 987                 return -1;
 988
 989         switch ( option ) {
 990                 case LDAP_OPT_X_SASL_MECH: {
 991                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 992                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 993                 } break;
 994                 case LDAP_OPT_X_SASL_REALM: {
 995                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 996                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 997                 } break;
 998                 case LDAP_OPT_X_SASL_AUTHCID: {
 999                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
1000                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
1001                 } break;
1002                 case LDAP_OPT_X_SASL_AUTHZID: {
1003                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
1004                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
1005                 } break;
1006
1007                 case LDAP_OPT_X_SASL_SSF: {
1008                         int sc;
1009                         sasl_ssf_t      *ssf;
1010                         sasl_conn_t *ctx;
1011
1012                         if( ld->ld_defconn == NULL ) {
1013                                 return -1;
1014                         }
1015
1016                         ctx = ld->ld_defconn->lconn_sasl_sockctx;
1017
1018                         if ( ctx == NULL ) {
1019                                 return -1;
1020                         }
1021
1022                         sc = sasl_getprop( ctx, SASL_SSF,
1023                                 (SASL_CONST void **) &ssf );
1024
1025                         if ( sc != SASL_OK ) {
1026                                 return -1;
1027                         }
1028
1029                         *(ber_len_t *)arg = *ssf;
1030                 } break;
1031
1032                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
1033                         /* this option is write only */
1034                         return -1;
1035
1036                 case LDAP_OPT_X_SASL_SSF_MIN:
1037                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
1038                         break;
1039                 case LDAP_OPT_X_SASL_SSF_MAX:
1040                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
1041                         break;
1042                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
1043                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
1044                         break;
1045
1046                 case LDAP_OPT_X_SASL_SECPROPS:
1047                         /* this option is write only */
1048                         return -1;
1049
1050                 default:
1051                         return -1;
1052         }
1053         return 0;
1054 }
1055
1056 int
1057 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
1058 {
1059         if ( ld == NULL )
1060                 return -1;
1061
1062         switch ( option ) {
1063         case LDAP_OPT_X_SASL_SSF:
1064                 /* This option is read-only */
1065                 return -1;
1066
1067         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1068                 int sc;
1069 #if SASL_VERSION_MAJOR < 2
1070                 sasl_external_properties_t extprops;
1071 #endif
1072                 sasl_conn_t *ctx;
1073
1074                 if( ld->ld_defconn == NULL ) {
1075                         return -1;
1076                 }
1077
1078                 ctx = ld->ld_defconn->lconn_sasl_authctx;
1079
1080                 if ( ctx == NULL ) {
1081                         return -1;
1082                 }
1083
1084 #if SASL_VERSION_MAJOR >= 2
1085                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1086 #else
1087                 memset(&extprops, 0L, sizeof(extprops));
1088
1089                 extprops.ssf = * (ber_len_t *) arg;
1090
1091                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1092                         (void *) &extprops );
1093 #endif
1094
1095                 if ( sc != SASL_OK ) {
1096                         return -1;
1097                 }
1098                 } break;
1099
1100         case LDAP_OPT_X_SASL_SSF_MIN:
1101                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1102                 break;
1103         case LDAP_OPT_X_SASL_SSF_MAX:
1104                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1105                 break;
1106         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1107                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1108                 break;
1109
1110         case LDAP_OPT_X_SASL_SECPROPS: {
1111                 int sc;
1112                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1113                         &ld->ld_options.ldo_sasl_secprops );
1114
1115                 return sc == LDAP_SUCCESS ? 0 : -1;
1116                 }
1117
1118         default:
1119                 return -1;
1120         }
1121         return 0;
1122 }
1123
1124 #ifdef LDAP_R_COMPILE
1125 #define LDAP_DEBUG_R_SASL
1126 void *ldap_pvt_sasl_mutex_new(void)
1127 {
1128         ldap_pvt_thread_mutex_t *mutex;
1129
1130         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1131                 sizeof(ldap_pvt_thread_mutex_t) );
1132
1133         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1134                 return mutex;
1135         }
1136 #ifndef LDAP_DEBUG_R_SASL
1137         assert( 0 );
1138 #endif /* !LDAP_DEBUG_R_SASL */
1139         return NULL;
1140 }
1141
1142 int ldap_pvt_sasl_mutex_lock(void *mutex)
1143 {
1144 #ifdef LDAP_DEBUG_R_SASL
1145         if ( mutex == NULL ) {
1146                 return SASL_OK;
1147         }
1148 #else /* !LDAP_DEBUG_R_SASL */
1149         assert( mutex );
1150 #endif /* !LDAP_DEBUG_R_SASL */
1151         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1152                 ? SASL_FAIL : SASL_OK;
1153 }
1154
1155 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1156 {
1157 #ifdef LDAP_DEBUG_R_SASL
1158         if ( mutex == NULL ) {
1159                 return SASL_OK;
1160         }
1161 #else /* !LDAP_DEBUG_R_SASL */
1162         assert( mutex );
1163 #endif /* !LDAP_DEBUG_R_SASL */
1164         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1165                 ? SASL_FAIL : SASL_OK;
1166 }
1167
1168 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1169 {
1170 #ifdef LDAP_DEBUG_R_SASL
1171         if ( mutex == NULL ) {
1172                 return;
1173         }
1174 #else /* !LDAP_DEBUG_R_SASL */
1175         assert( mutex );
1176 #endif /* !LDAP_DEBUG_R_SASL */
1177         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1178         LDAP_FREE( mutex );
1179 }
1180 #endif
1181
1182 #else
1183 int ldap_int_sasl_init( void )
1184 { return LDAP_SUCCESS; }
1185
1186 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1187 { return LDAP_SUCCESS; }
1188
1189 int
1190 ldap_int_sasl_bind(
1191         LDAP                    *ld,
1192         const char              *dn,
1193         const char              *mechs,
1194         LDAPControl             **sctrls,
1195         LDAPControl             **cctrls,
1196         unsigned                flags,
1197         LDAP_SASL_INTERACT_PROC *interact,
1198         void * defaults )
1199 { return LDAP_NOT_SUPPORTED; }
1200
1201 int
1202 ldap_int_sasl_external(
1203         LDAP *ld,
1204         LDAPConn *conn,
1205         const char * authid,
1206         ber_len_t ssf )
1207 { return LDAP_SUCCESS; }
1208
1209 #endif /* HAVE_CYRUS_SASL */