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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1999-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10
  11 #include <ac/socket.h>
  12 #include <ac/stdlib.h>
  13 #include <ac/string.h>
  14 #include <ac/time.h>
  15 #include <ac/errno.h>
  16 #include <ac/ctype.h>
  17
  18 #include "ldap-int.h"
  19
  20 #ifdef HAVE_CYRUS_SASL
  21
  22 #ifdef LDAP_R_COMPILE
  23 ldap_pvt_thread_mutex_t ldap_int_sasl_mutex;
  24 #endif
  25
  26 #ifdef HAVE_SASL_SASL_H
  27 #include <sasl/sasl.h>
  28 #else
  29 #include <sasl.h>
  30 #endif
  31
  32 #if SASL_VERSION_MAJOR >= 2
  33 #define SASL_CONST const
  34 #else
  35 #define SASL_CONST
  36 #endif
  37
  38 /*
  39 * Various Cyrus SASL related stuff.
  40 */
  41
  42 int ldap_int_sasl_init( void )
  43 {
  44         /* XXX not threadsafe */
  45         static int sasl_initialized = 0;
  46
  47         static sasl_callback_t client_callbacks[] = {
  48 #ifdef SASL_CB_GETREALM
  49                 { SASL_CB_GETREALM, NULL, NULL },
  50 #endif
  51                 { SASL_CB_USER, NULL, NULL },
  52                 { SASL_CB_AUTHNAME, NULL, NULL },
  53                 { SASL_CB_PASS, NULL, NULL },
  54                 { SASL_CB_ECHOPROMPT, NULL, NULL },
  55                 { SASL_CB_NOECHOPROMPT, NULL, NULL },
  56                 { SASL_CB_LIST_END, NULL, NULL }
  57         };
  58
  59         if ( sasl_initialized ) {
  60                 return 0;
  61         }
  62
  63 #ifndef CSRIMALLOC
  64         sasl_set_alloc(
  65                 ber_memalloc,
  66                 ber_memcalloc,
  67                 ber_memrealloc,
  68                 ber_memfree );
  69 #endif /* CSRIMALLOC */
  70
  71 #ifdef LDAP_R_COMPILE
  72         sasl_set_mutex(
  73                 ldap_pvt_sasl_mutex_new,
  74                 ldap_pvt_sasl_mutex_lock,
  75                 ldap_pvt_sasl_mutex_unlock,
  76                 ldap_pvt_sasl_mutex_dispose );
  77
  78         ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
  79 #endif
  80
  81         if ( sasl_client_init( client_callbacks ) == SASL_OK ) {
  82                 sasl_initialized = 1;
  83                 return 0;
  84         }
  85
  86         return -1;
  87 }
  88
  89 /*
  90  * SASL encryption support for LBER Sockbufs
  91  */
  92
  93 struct sb_sasl_data {
  94         sasl_conn_t             *sasl_context;
  95         Sockbuf_Buf             sec_buf_in;
  96         Sockbuf_Buf             buf_in;
  97         Sockbuf_Buf             buf_out;
  98 };
  99
 100 static int
 101 sb_sasl_setup( Sockbuf_IO_Desc *sbiod, void *arg )
 102 {
 103         struct sb_sasl_data     *p;
 104
 105         assert( sbiod != NULL );
 106
 107         p = LBER_MALLOC( sizeof( *p ) );
 108         if ( p == NULL )
 109                 return -1;
 110         p->sasl_context = (sasl_conn_t *)arg;
 111         ber_pvt_sb_buf_init( &p->sec_buf_in );
 112         ber_pvt_sb_buf_init( &p->buf_in );
 113         ber_pvt_sb_buf_init( &p->buf_out );
 114         if ( ber_pvt_sb_grow_buffer( &p->sec_buf_in, SASL_MIN_BUFF_SIZE ) < 0 ) {
 115                 errno = ENOMEM;
 116                 return -1;
 117         }
 118
 119         sbiod->sbiod_pvt = p;
 120
 121         return 0;
 122 }
 123
 124 static int
 125 sb_sasl_remove( Sockbuf_IO_Desc *sbiod )
 126 {
 127         struct sb_sasl_data     *p;
 128
 129         assert( sbiod != NULL );
 130
 131         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 132 #if SASL_VERSION_MAJOR >= 2
 133         /*
 134          * SASLv2 encode/decode buffers are managed by
 135          * libsasl2. Ensure they are not freed by liblber.
 136          */
 137         p->buf_in.buf_base = NULL;
 138         p->buf_out.buf_base = NULL;
 139 #endif
 140         ber_pvt_sb_buf_destroy( &p->sec_buf_in );
 141         ber_pvt_sb_buf_destroy( &p->buf_in );
 142         ber_pvt_sb_buf_destroy( &p->buf_out );
 143         LBER_FREE( p );
 144         sbiod->sbiod_pvt = NULL;
 145         return 0;
 146 }
 147
 148 static ber_len_t
 149 sb_sasl_pkt_length( const unsigned char *buf, int debuglevel )
 150 {
 151         ber_len_t               size;
 152
 153         assert( buf != NULL );
 154
 155         size = buf[0] << 24
 156                 | buf[1] << 16
 157                 | buf[2] << 8
 158                 | buf[3];
 159
 160         /* we really should check against actual buffer size set
 161          * in the secopts.
 162          */
 163         if ( size > SASL_MAX_BUFF_SIZE ) {
 164                 /* somebody is trying to mess me up. */
 165                 ber_log_printf( LDAP_DEBUG_ANY, debuglevel,
 166                         "sb_sasl_pkt_length: received illegal packet length "
 167                         "of %lu bytes\n", (unsigned long)size );
 168                 size = 16; /* this should lead to an error. */
 169         }
 170
 171         return size + 4; /* include the size !!! */
 172 }
 173
 174 /* Drop a processed packet from the input buffer */
 175 static void
 176 sb_sasl_drop_packet ( Sockbuf_Buf *sec_buf_in, int debuglevel )
 177 {
 178         ber_slen_t                      len;
 179
 180         len = sec_buf_in->buf_ptr - sec_buf_in->buf_end;
 181         if ( len > 0 )
 182                 AC_MEMCPY( sec_buf_in->buf_base, sec_buf_in->buf_base +
 183                         sec_buf_in->buf_end, len );
 184
 185         if ( len >= 4 ) {
 186                 sec_buf_in->buf_end = sb_sasl_pkt_length( sec_buf_in->buf_base,
 187                         debuglevel);
 188         }
 189         else {
 190                 sec_buf_in->buf_end = 0;
 191         }
 192         sec_buf_in->buf_ptr = len;
 193 }
 194
 195 static ber_slen_t
 196 sb_sasl_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 197 {
 198         struct sb_sasl_data     *p;
 199         ber_slen_t              ret, bufptr;
 200
 201         assert( sbiod != NULL );
 202         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 203
 204         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 205
 206         /* Are there anything left in the buffer? */
 207         ret = ber_pvt_sb_copy_out( &p->buf_in, buf, len );
 208         bufptr = ret;
 209         len -= ret;
 210
 211         if ( len == 0 )
 212                 return bufptr;
 213
 214 #if SASL_VERSION_MAJOR >= 2
 215         ber_pvt_sb_buf_init( &p->buf_in );
 216 #else
 217         ber_pvt_sb_buf_destroy( &p->buf_in );
 218 #endif
 219
 220         /* Read the length of the packet */
 221         while ( p->sec_buf_in.buf_ptr < 4 ) {
 222                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base,
 223                         4 - p->sec_buf_in.buf_ptr );
 224 #ifdef EINTR
 225                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 226                         continue;
 227 #endif
 228                 if ( ret <= 0 )
 229                         return ret;
 230
 231                 p->sec_buf_in.buf_ptr += ret;
 232         }
 233
 234         /* The new packet always starts at p->sec_buf_in.buf_base */
 235         ret = sb_sasl_pkt_length( p->sec_buf_in.buf_base,
 236                 sbiod->sbiod_sb->sb_debug );
 237
 238         /* Grow the packet buffer if neccessary */
 239         if ( ( p->sec_buf_in.buf_size < (ber_len_t) ret ) &&
 240                 ber_pvt_sb_grow_buffer( &p->sec_buf_in, ret ) < 0 )
 241         {
 242                 errno = ENOMEM;
 243                 return -1;
 244         }
 245         p->sec_buf_in.buf_end = ret;
 246
 247         /* Did we read the whole encrypted packet? */
 248         while ( p->sec_buf_in.buf_ptr < p->sec_buf_in.buf_end ) {
 249                 /* No, we have got only a part of it */
 250                 ret = p->sec_buf_in.buf_end - p->sec_buf_in.buf_ptr;
 251
 252                 ret = LBER_SBIOD_READ_NEXT( sbiod, p->sec_buf_in.buf_base +
 253                         p->sec_buf_in.buf_ptr, ret );
 254 #ifdef EINTR
 255                 if ( ( ret < 0 ) && ( errno == EINTR ) )
 256                         continue;
 257 #endif
 258                 if ( ret <= 0 )
 259                         return ret;
 260
 261                 p->sec_buf_in.buf_ptr += ret;
 262         }
 263
 264         /* Decode the packet */
 265         ret = sasl_decode( p->sasl_context, p->sec_buf_in.buf_base,
 266                 p->sec_buf_in.buf_end,
 267                 (SASL_CONST char **)&p->buf_in.buf_base,
 268                 (unsigned *)&p->buf_in.buf_end );
 269         if ( ret != SASL_OK ) {
 270                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 271                         "sb_sasl_read: failed to decode packet: %s\n",
 272                         sasl_errstring( ret, NULL, NULL ) );
 273                 sb_sasl_drop_packet( &p->sec_buf_in,
 274                         sbiod->sbiod_sb->sb_debug );
 275                 errno = EIO;
 276                 return -1;
 277         }
 278
 279         /* Drop the packet from the input buffer */
 280         sb_sasl_drop_packet( &p->sec_buf_in, sbiod->sbiod_sb->sb_debug );
 281
 282         p->buf_in.buf_size = p->buf_in.buf_end;
 283
 284         bufptr += ber_pvt_sb_copy_out( &p->buf_in, (char*) buf + bufptr, len );
 285
 286         return bufptr;
 287 }
 288
 289 static ber_slen_t
 290 sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 291 {
 292         struct sb_sasl_data     *p;
 293         int                     ret;
 294         unsigned                *max;
 295
 296         assert( sbiod != NULL );
 297         assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
 298
 299         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 300
 301         /* Are there anything left in the buffer? */
 302         if ( p->buf_out.buf_ptr != p->buf_out.buf_end ) {
 303                 ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 304                 if ( ret <= 0 )
 305                         return ret;
 306         }
 307
 308         /* now encode the next packet. */
 309 #if SASL_VERSION_MAJOR >= 2
 310         ber_pvt_sb_buf_init( &p->buf_out );
 311         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF, (const void **)&max );
 312 #else
 313         ber_pvt_sb_buf_destroy( &p->buf_out );
 314         sasl_getprop( p->sasl_context, SASL_MAXOUTBUF, (void **)&max );
 315 #endif
 316         if ( len > *max - 100 )
 317                 len = *max - 100;       /* For safety margin */
 318         ret = sasl_encode( p->sasl_context, buf, len,
 319                 (SASL_CONST char **)&p->buf_out.buf_base,
 320                 (unsigned *)&p->buf_out.buf_size );
 321         if ( ret != SASL_OK ) {
 322                 ber_log_printf( LDAP_DEBUG_ANY, sbiod->sbiod_sb->sb_debug,
 323                         "sb_sasl_write: failed to encode packet: %s\n",
 324                         sasl_errstring( ret, NULL, NULL ) );
 325                 return -1;
 326         }
 327         p->buf_out.buf_end = p->buf_out.buf_size;
 328
 329         ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 330         if ( ret <= 0 )
 331                 return ret;
 332         return len;
 333 }
 334
 335 static int
 336 sb_sasl_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
 337 {
 338         struct sb_sasl_data     *p;
 339
 340         p = (struct sb_sasl_data *)sbiod->sbiod_pvt;
 341
 342         if ( opt == LBER_SB_OPT_DATA_READY ) {
 343                 if ( p->buf_in.buf_ptr != p->buf_in.buf_end )
 344                         return 1;
 345         }
 346
 347         return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
 348 }
 349
 350 Sockbuf_IO ldap_pvt_sockbuf_io_sasl = {
 351         sb_sasl_setup,          /* sbi_setup */
 352         sb_sasl_remove,         /* sbi_remove */
 353         sb_sasl_ctrl,           /* sbi_ctrl */
 354         sb_sasl_read,           /* sbi_read */
 355         sb_sasl_write,          /* sbi_write */
 356         NULL                    /* sbi_close */
 357 };
 358
 359 int ldap_pvt_sasl_install( Sockbuf *sb, void *ctx_arg )
 360 {
 361 #ifdef NEW_LOGGING
 362         LDAP_LOG (( "cyrus", LDAP_LEVEL_ENTRY, "ldap_pvt_sasl_install\n" ));
 363 #else
 364         Debug( LDAP_DEBUG_TRACE, "ldap_pvt_sasl_install\n",
 365                 0, 0, 0 );
 366 #endif
 367
 368         /* don't install the stuff unless security has been negotiated */
 369
 370         if ( !ber_sockbuf_ctrl( sb, LBER_SB_OPT_HAS_IO,
 371                         &ldap_pvt_sockbuf_io_sasl ) )
 372         {
 373 #ifdef LDAP_DEBUG
 374                 ber_sockbuf_add_io( sb, &ber_sockbuf_io_debug,
 375                         LBER_SBIOD_LEVEL_APPLICATION, (void *)"sasl_" );
 376 #endif
 377                 ber_sockbuf_add_io( sb, &ldap_pvt_sockbuf_io_sasl,
 378                         LBER_SBIOD_LEVEL_APPLICATION, ctx_arg );
 379         }
 380
 381         return LDAP_SUCCESS;
 382 }
 383
 384 static int
 385 sasl_err2ldap( int saslerr )
 386 {
 387         int rc;
 388
 389         switch (saslerr) {
 390                 case SASL_CONTINUE:
 391                         rc = LDAP_MORE_RESULTS_TO_RETURN;
 392                         break;
 393                 case SASL_INTERACT:
 394                         rc = LDAP_LOCAL_ERROR;
 395                         break;
 396                 case SASL_OK:
 397                         rc = LDAP_SUCCESS;
 398                         break;
 399                 case SASL_FAIL:
 400                         rc = LDAP_LOCAL_ERROR;
 401                         break;
 402                 case SASL_NOMEM:
 403                         rc = LDAP_NO_MEMORY;
 404                         break;
 405                 case SASL_NOMECH:
 406                         rc = LDAP_AUTH_UNKNOWN;
 407                         break;
 408                 case SASL_BADAUTH:
 409                         rc = LDAP_AUTH_UNKNOWN;
 410                         break;
 411                 case SASL_NOAUTHZ:
 412                         rc = LDAP_PARAM_ERROR;
 413                         break;
 414                 case SASL_TOOWEAK:
 415                 case SASL_ENCRYPT:
 416                         rc = LDAP_AUTH_UNKNOWN;
 417                         break;
 418                 default:
 419                         rc = LDAP_LOCAL_ERROR;
 420                         break;
 421         }
 422
 423         assert( rc == LDAP_SUCCESS || LDAP_API_ERROR( rc ) );
 424         return rc;
 425 }
 426
 427 int
 428 ldap_int_sasl_open(
 429         LDAP *ld,
 430         LDAPConn *lc,
 431         const char * host,
 432         ber_len_t ssf )
 433 {
 434         int rc;
 435         sasl_conn_t *ctx;
 436
 437         assert( lc->lconn_sasl_ctx == NULL );
 438
 439         if ( host == NULL ) {
 440                 ld->ld_errno = LDAP_LOCAL_ERROR;
 441                 return ld->ld_errno;
 442         }
 443
 444 #if SASL_VERSION_MAJOR >= 2
 445         rc = sasl_client_new( "ldap", host, NULL, NULL,
 446                 NULL, 0, &ctx );
 447 #else
 448         rc = sasl_client_new( "ldap", host, NULL,
 449                 SASL_SECURITY_LAYER, &ctx );
 450 #endif
 451
 452         if ( rc != SASL_OK ) {
 453                 ld->ld_errno = sasl_err2ldap( rc );
 454                 return ld->ld_errno;
 455         }
 456
 457 #ifdef NEW_LOGGING
 458         LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 459                 "ldap_int_sasl_open: host=%s\n", host ));
 460 #else
 461         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: host=%s\n",
 462                 host, 0, 0 );
 463 #endif
 464
 465         lc->lconn_sasl_ctx = ctx;
 466
 467         if( ssf ) {
 468 #if SASL_VERSION_MAJOR >= 2
 469                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 470                         (void *) &ssf );
 471 #else
 472                 sasl_external_properties_t extprops;
 473                 memset(&extprops, 0L, sizeof(extprops));
 474                 extprops.ssf = ssf;
 475
 476                 (void) sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 477                         (void *) &extprops );
 478 #endif
 479 #ifdef NEW_LOGGING
 480                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 481                         "ldap_int_sasl_open: ssf=%ld\n", (long) ssf ));
 482 #else
 483                 Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_open: ssf=%ld\n",
 484                         (long) ssf, 0, 0 );
 485 #endif
 486         }
 487
 488         return LDAP_SUCCESS;
 489 }
 490
 491 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
 492 {
 493         sasl_conn_t *ctx = lc->lconn_sasl_ctx;
 494
 495         if( ctx != NULL ) {
 496                 sasl_dispose( &ctx );
 497                 lc->lconn_sasl_ctx = NULL;
 498         }
 499
 500         return LDAP_SUCCESS;
 501 }
 502
 503 int
 504 ldap_int_sasl_bind(
 505         LDAP                    *ld,
 506         const char              *dn,
 507         const char              *mechs,
 508         LDAPControl             **sctrls,
 509         LDAPControl             **cctrls,
 510         unsigned                flags,
 511         LDAP_SASL_INTERACT_PROC *interact,
 512         void * defaults )
 513 {
 514         char *data;
 515         const char *mech = NULL;
 516         const char *pmech = NULL;
 517         int                     saslrc, rc;
 518         sasl_ssf_t              *ssf = NULL;
 519         sasl_conn_t     *ctx;
 520         sasl_interact_t *prompts = NULL;
 521         unsigned credlen;
 522         struct berval ccred;
 523         ber_socket_t            sd;
 524
 525 #ifdef NEW_LOGGING
 526         LDAP_LOG (( "cyrus", LDAP_LEVEL_ARGS,
 527                         "ldap_int_sasl_bind: %s\n", mechs ? mechs : "<null>" ));
 528 #else
 529         Debug( LDAP_DEBUG_TRACE, "ldap_int_sasl_bind: %s\n",
 530                 mechs ? mechs : "<null>", 0, 0 );
 531 #endif
 532
 533         /* do a quick !LDAPv3 check... ldap_sasl_bind will do the rest. */
 534         if (ld->ld_version < LDAP_VERSION3) {
 535                 ld->ld_errno = LDAP_NOT_SUPPORTED;
 536                 return ld->ld_errno;
 537         }
 538
 539         ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 540
 541         if ( sd == AC_SOCKET_INVALID ) {
 542                 /* not connected yet */
 543                 int rc;
 544
 545                 rc = ldap_open_defconn( ld );
 546                 if( rc < 0 ) return ld->ld_errno;
 547
 548                 ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, &sd );
 549
 550                 if( sd == AC_SOCKET_INVALID ) {
 551                         ld->ld_errno = LDAP_LOCAL_ERROR;
 552                         return ld->ld_errno;
 553                 }
 554         }
 555
 556         ctx = ld->ld_defconn->lconn_sasl_ctx;
 557
 558         if( ctx == NULL ) {
 559                 ld->ld_errno = LDAP_LOCAL_ERROR;
 560                 return ld->ld_errno;
 561         }
 562
 563         /* (re)set security properties */
 564         sasl_setprop( ctx, SASL_SEC_PROPS,
 565                 &ld->ld_options.ldo_sasl_secprops );
 566
 567         ccred.bv_val = NULL;
 568         ccred.bv_len = 0;
 569
 570         do {
 571                 saslrc = sasl_client_start( ctx,
 572                         mechs,
 573 #if SASL_VERSION_MAJOR < 2
 574                         NULL,
 575 #endif
 576                         &prompts,
 577                         (SASL_CONST char **)&ccred.bv_val,
 578                         &credlen,
 579                         &mech );
 580
 581                 if( pmech == NULL && mech != NULL ) {
 582                         pmech = mech;
 583
 584                         if( flags != LDAP_SASL_QUIET ) {
 585                                 fprintf(stderr,
 586                                         "SASL/%s authentication started\n",
 587                                         pmech );
 588                         }
 589                 }
 590
 591 #if SASL_VERSION_MAJOR >= 2
 592                 /* XXX the application should free interact results. */
 593                 if ( prompts != NULL && prompts->result != NULL ) {
 594                         LDAP_FREE( (void *)prompts->result );
 595                         prompts->result = NULL;
 596                 }
 597 #endif
 598
 599                 if( saslrc == SASL_INTERACT ) {
 600                         int res;
 601                         if( !interact ) break;
 602                         res = (interact)( ld, flags, defaults, prompts );
 603                         if( res != LDAP_SUCCESS ) {
 604                                 break;
 605                         }
 606                 }
 607         } while ( saslrc == SASL_INTERACT );
 608
 609         ccred.bv_len = credlen;
 610
 611         if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 612                 ld->ld_errno = sasl_err2ldap( saslrc );
 613 #if SASL_VERSION_MAJOR >= 2
 614                 ld->ld_error = (char *)sasl_errdetail( ctx );
 615 #endif
 616                 return ld->ld_errno;
 617         }
 618
 619         do {
 620                 struct berval *scred;
 621                 unsigned credlen;
 622
 623                 scred = NULL;
 624
 625                 rc = ldap_sasl_bind_s( ld, dn, mech, &ccred, sctrls, cctrls, &scred );
 626
 627                 if ( ccred.bv_val != NULL ) {
 628 #if SASL_VERSION_MAJOR < 2
 629                         LDAP_FREE( ccred.bv_val );
 630 #endif
 631                         ccred.bv_val = NULL;
 632                 }
 633
 634                 if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
 635                         if( scred && scred->bv_len ) {
 636                                 /* and server provided us with data? */
 637 #ifdef NEW_LOGGING
 638                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 639                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 640                                         rc, saslrc, scred->bv_len ));
 641 #else
 642                                 Debug( LDAP_DEBUG_TRACE,
 643                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 644                                         rc, saslrc, scred->bv_len );
 645 #endif
 646                                 ber_bvfree( scred );
 647                         }
 648                         return ld->ld_errno;
 649                 }
 650
 651                 if( rc == LDAP_SUCCESS && saslrc == SASL_OK ) {
 652                         /* we're done, no need to step */
 653                         if( scred && scred->bv_len ) {
 654                                 /* but server provided us with data! */
 655 #ifdef NEW_LOGGING
 656                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 657                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 658                                         rc, saslrc, scred->bv_len ));
 659 #else
 660                                 Debug( LDAP_DEBUG_TRACE,
 661                                         "ldap_int_sasl_bind: rc=%d sasl=%d len=%ld\n",
 662                                         rc, saslrc, scred->bv_len );
 663 #endif
 664                                 ber_bvfree( scred );
 665                                 return ld->ld_errno = LDAP_LOCAL_ERROR;
 666                         }
 667                         break;
 668                 }
 669
 670                 do {
 671                         saslrc = sasl_client_step( ctx,
 672                                 (scred == NULL) ? NULL : scred->bv_val,
 673                                 (scred == NULL) ? 0 : scred->bv_len,
 674                                 &prompts,
 675                                 (SASL_CONST char **)&ccred.bv_val,
 676                                 &credlen );
 677
 678 #ifdef NEW_LOGGING
 679                                 LDAP_LOG (( "cyrus", LDAP_LEVEL_DETAIL1,
 680                                         "ldap_int_sasl_bind: sasl_client_step: %d\n", saslrc ));
 681 #else
 682                         Debug( LDAP_DEBUG_TRACE, "sasl_client_step: %d\n",
 683                                 saslrc, 0, 0 );
 684 #endif
 685
 686 #if SASL_VERSION_MAJOR >= 2
 687                         /* XXX the application should free interact results. */
 688                         if ( prompts != NULL && prompts->result != NULL ) {
 689                                 LDAP_FREE( (void *)prompts->result );
 690                                 prompts->result = NULL;
 691                         }
 692 #endif
 693
 694                         if( saslrc == SASL_INTERACT ) {
 695                                 int res;
 696                                 if( !interact ) break;
 697                                 res = (interact)( ld, flags, defaults, prompts );
 698                                 if( res != LDAP_SUCCESS ) {
 699                                         break;
 700                                 }
 701                         }
 702                 } while ( saslrc == SASL_INTERACT );
 703
 704                 ccred.bv_len = credlen;
 705                 ber_bvfree( scred );
 706
 707                 if ( (saslrc != SASL_OK) && (saslrc != SASL_CONTINUE) ) {
 708                         ld->ld_errno = sasl_err2ldap( saslrc );
 709 #if SASL_VERSION_MAJOR >= 2
 710                         ld->ld_error = (char *)sasl_errdetail( ctx );
 711 #endif
 712                         return ld->ld_errno;
 713                 }
 714         } while ( rc == LDAP_SASL_BIND_IN_PROGRESS );
 715
 716         if ( rc != LDAP_SUCCESS ) {
 717                 return rc;
 718         }
 719
 720         if ( saslrc != SASL_OK ) {
 721 #if SASL_VERSION_MAJOR >= 2
 722                 ld->ld_error = (char *)sasl_errdetail( ctx );
 723 #endif
 724                 return ld->ld_errno = sasl_err2ldap( saslrc );
 725         }
 726
 727         if( flags != LDAP_SASL_QUIET ) {
 728                 saslrc = sasl_getprop( ctx, SASL_USERNAME, (SASL_CONST void **) &data );
 729                 if( saslrc == SASL_OK && data && *data ) {
 730                         fprintf( stderr, "SASL username: %s\n", data );
 731                 }
 732
 733 #if SASL_VERSION_MAJOR >= 2
 734                 saslrc = sasl_getprop( ctx, SASL_DEFUSERREALM, (SASL_CONST void **) &data );
 735 #else
 736                 saslrc = sasl_getprop( ctx, SASL_REALM, (SASL_CONST void **) &data );
 737 #endif
 738                 if( saslrc == SASL_OK && data && *data ) {
 739                         fprintf( stderr, "SASL realm: %s\n", data );
 740                 }
 741         }
 742
 743         saslrc = sasl_getprop( ctx, SASL_SSF, (SASL_CONST void **) &ssf );
 744         if( saslrc == SASL_OK ) {
 745                 if( flags != LDAP_SASL_QUIET ) {
 746                         fprintf( stderr, "SASL SSF: %lu\n",
 747                                 (unsigned long) *ssf );
 748                 }
 749
 750                 if( ssf && *ssf ) {
 751                         if( flags != LDAP_SASL_QUIET ) {
 752                                 fprintf( stderr, "SASL installing layers\n" );
 753                         }
 754                         ldap_pvt_sasl_install( ld->ld_conns->lconn_sb, ctx );
 755                 }
 756         }
 757
 758         return rc;
 759 }
 760
 761 int
 762 ldap_int_sasl_external(
 763         LDAP *ld,
 764         LDAPConn *conn,
 765         const char * authid,
 766         ber_len_t ssf )
 767 {
 768         int sc;
 769         sasl_conn_t *ctx;
 770 #if SASL_VERSION_MAJOR < 2
 771         sasl_external_properties_t extprops;
 772 #endif
 773
 774         ctx = conn->lconn_sasl_ctx;
 775
 776         if ( ctx == NULL ) {
 777                 return LDAP_LOCAL_ERROR;
 778         }
 779
 780 #if SASL_VERSION_MAJOR >= 2
 781         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 782         if ( sc == SASL_OK )
 783                 sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
 784 #else
 785         memset( &extprops, '\0', sizeof(extprops) );
 786         extprops.ssf = ssf;
 787         extprops.auth_id = (char *) authid;
 788
 789         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 790                 (void *) &extprops );
 791 #endif
 792
 793         if ( sc != SASL_OK ) {
 794                 return LDAP_LOCAL_ERROR;
 795         }
 796
 797         return LDAP_SUCCESS;
 798 }
 799
 800
 801 int ldap_pvt_sasl_secprops(
 802         const char *in,
 803         sasl_security_properties_t *secprops )
 804 {
 805         int i;
 806         char **props = ldap_str2charray( in, "," );
 807         unsigned sflags = 0;
 808         int got_sflags = 0;
 809         sasl_ssf_t max_ssf = 0;
 810         int got_max_ssf = 0;
 811         sasl_ssf_t min_ssf = 0;
 812         int got_min_ssf = 0;
 813         unsigned maxbufsize = 0;
 814         int got_maxbufsize = 0;
 815
 816         if( props == NULL || secprops == NULL ) {
 817                 return LDAP_PARAM_ERROR;
 818         }
 819
 820         for( i=0; props[i]; i++ ) {
 821                 if( !strcasecmp(props[i], "none") ) {
 822                         got_sflags++;
 823
 824                 } else if( !strcasecmp(props[i], "noplain") ) {
 825                         got_sflags++;
 826                         sflags |= SASL_SEC_NOPLAINTEXT;
 827
 828                 } else if( !strcasecmp(props[i], "noactive") ) {
 829                         got_sflags++;
 830                         sflags |= SASL_SEC_NOACTIVE;
 831
 832                 } else if( !strcasecmp(props[i], "nodict") ) {
 833                         got_sflags++;
 834                         sflags |= SASL_SEC_NODICTIONARY;
 835
 836                 } else if( !strcasecmp(props[i], "forwardsec") ) {
 837                         got_sflags++;
 838                         sflags |= SASL_SEC_FORWARD_SECRECY;
 839
 840                 } else if( !strcasecmp(props[i], "noanonymous")) {
 841                         got_sflags++;
 842                         sflags |= SASL_SEC_NOANONYMOUS;
 843
 844                 } else if( !strcasecmp(props[i], "passcred") ) {
 845                         got_sflags++;
 846                         sflags |= SASL_SEC_PASS_CREDENTIALS;
 847
 848                 } else if( !strncasecmp(props[i],
 849                         "minssf=", sizeof("minssf")) )
 850                 {
 851                         if( isdigit( (unsigned char) props[i][sizeof("minssf")] ) ) {
 852                                 got_min_ssf++;
 853                                 min_ssf = atoi( &props[i][sizeof("minssf")] );
 854                         } else {
 855                                 return LDAP_NOT_SUPPORTED;
 856                         }
 857
 858                 } else if( !strncasecmp(props[i],
 859                         "maxssf=", sizeof("maxssf")) )
 860                 {
 861                         if( isdigit( (unsigned char) props[i][sizeof("maxssf")] ) ) {
 862                                 got_max_ssf++;
 863                                 max_ssf = atoi( &props[i][sizeof("maxssf")] );
 864                         } else {
 865                                 return LDAP_NOT_SUPPORTED;
 866                         }
 867
 868                 } else if( !strncasecmp(props[i],
 869                         "maxbufsize=", sizeof("maxbufsize")) )
 870                 {
 871                         if( isdigit( (unsigned char) props[i][sizeof("maxbufsize")] ) ) {
 872                                 got_maxbufsize++;
 873                                 maxbufsize = atoi( &props[i][sizeof("maxbufsize")] );
 874                         } else {
 875                                 return LDAP_NOT_SUPPORTED;
 876                         }
 877
 878                         if( maxbufsize && (( maxbufsize < SASL_MIN_BUFF_SIZE )
 879                                 || (maxbufsize > SASL_MAX_BUFF_SIZE )))
 880                         {
 881                                 /* bad maxbufsize */
 882                                 return LDAP_PARAM_ERROR;
 883                         }
 884
 885                 } else {
 886                         return LDAP_NOT_SUPPORTED;
 887                 }
 888         }
 889
 890         if(got_sflags) {
 891                 secprops->security_flags = sflags;
 892         }
 893         if(got_min_ssf) {
 894                 secprops->min_ssf = min_ssf;
 895         }
 896         if(got_max_ssf) {
 897                 secprops->max_ssf = max_ssf;
 898         }
 899         if(got_maxbufsize) {
 900                 secprops->maxbufsize = maxbufsize;
 901         }
 902
 903         ldap_charray_free( props );
 904         return LDAP_SUCCESS;
 905 }
 906
 907 int
 908 ldap_int_sasl_config( struct ldapoptions *lo, int option, const char *arg )
 909 {
 910         int rc;
 911
 912         switch( option ) {
 913         case LDAP_OPT_X_SASL_SECPROPS:
 914                 rc = ldap_pvt_sasl_secprops( arg, &lo->ldo_sasl_secprops );
 915                 if( rc == LDAP_SUCCESS ) return 0;
 916         }
 917
 918         return -1;
 919 }
 920
 921 int
 922 ldap_int_sasl_get_option( LDAP *ld, int option, void *arg )
 923 {
 924         if ( ld == NULL )
 925                 return -1;
 926
 927         switch ( option ) {
 928                 case LDAP_OPT_X_SASL_MECH: {
 929                         *(char **)arg = ld->ld_options.ldo_def_sasl_mech
 930                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_mech ) : NULL;
 931                 } break;
 932                 case LDAP_OPT_X_SASL_REALM: {
 933                         *(char **)arg = ld->ld_options.ldo_def_sasl_realm
 934                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_realm ) : NULL;
 935                 } break;
 936                 case LDAP_OPT_X_SASL_AUTHCID: {
 937                         *(char **)arg = ld->ld_options.ldo_def_sasl_authcid
 938                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authcid ) : NULL;
 939                 } break;
 940                 case LDAP_OPT_X_SASL_AUTHZID: {
 941                         *(char **)arg = ld->ld_options.ldo_def_sasl_authzid
 942                                 ? LDAP_STRDUP( ld->ld_options.ldo_def_sasl_authzid ) : NULL;
 943                 } break;
 944
 945                 case LDAP_OPT_X_SASL_SSF: {
 946                         int sc;
 947                         sasl_ssf_t      *ssf;
 948                         sasl_conn_t *ctx;
 949
 950                         if( ld->ld_defconn == NULL ) {
 951                                 return -1;
 952                         }
 953
 954                         ctx = ld->ld_defconn->lconn_sasl_ctx;
 955
 956                         if ( ctx == NULL ) {
 957                                 return -1;
 958                         }
 959
 960                         sc = sasl_getprop( ctx, SASL_SSF,
 961                                 (SASL_CONST void **) &ssf );
 962
 963                         if ( sc != SASL_OK ) {
 964                                 return -1;
 965                         }
 966
 967                         *(ber_len_t *)arg = *ssf;
 968                 } break;
 969
 970                 case LDAP_OPT_X_SASL_SSF_EXTERNAL:
 971                         /* this option is write only */
 972                         return -1;
 973
 974                 case LDAP_OPT_X_SASL_SSF_MIN:
 975                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.min_ssf;
 976                         break;
 977                 case LDAP_OPT_X_SASL_SSF_MAX:
 978                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.max_ssf;
 979                         break;
 980                 case LDAP_OPT_X_SASL_MAXBUFSIZE:
 981                         *(ber_len_t *)arg = ld->ld_options.ldo_sasl_secprops.maxbufsize;
 982                         break;
 983
 984                 case LDAP_OPT_X_SASL_SECPROPS:
 985                         /* this option is write only */
 986                         return -1;
 987
 988                 default:
 989                         return -1;
 990         }
 991         return 0;
 992 }
 993
 994 int
 995 ldap_int_sasl_set_option( LDAP *ld, int option, void *arg )
 996 {
 997         if ( ld == NULL )
 998                 return -1;
 999
1000         switch ( option ) {
1001         case LDAP_OPT_X_SASL_SSF:
1002                 /* This option is read-only */
1003                 return -1;
1004
1005         case LDAP_OPT_X_SASL_SSF_EXTERNAL: {
1006                 int sc;
1007 #if SASL_VERSION_MAJOR < 2
1008                 sasl_external_properties_t extprops;
1009 #endif
1010                 sasl_conn_t *ctx;
1011
1012                 if( ld->ld_defconn == NULL ) {
1013                         return -1;
1014                 }
1015
1016                 ctx = ld->ld_defconn->lconn_sasl_ctx;
1017
1018                 if ( ctx == NULL ) {
1019                         return -1;
1020                 }
1021
1022 #if SASL_VERSION_MAJOR >= 2
1023                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, arg);
1024 #else
1025                 memset(&extprops, 0L, sizeof(extprops));
1026
1027                 extprops.ssf = * (ber_len_t *) arg;
1028
1029                 sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
1030                         (void *) &extprops );
1031 #endif
1032
1033                 if ( sc != SASL_OK ) {
1034                         return -1;
1035                 }
1036                 } break;
1037
1038         case LDAP_OPT_X_SASL_SSF_MIN:
1039                 ld->ld_options.ldo_sasl_secprops.min_ssf = *(ber_len_t *)arg;
1040                 break;
1041         case LDAP_OPT_X_SASL_SSF_MAX:
1042                 ld->ld_options.ldo_sasl_secprops.max_ssf = *(ber_len_t *)arg;
1043                 break;
1044         case LDAP_OPT_X_SASL_MAXBUFSIZE:
1045                 ld->ld_options.ldo_sasl_secprops.maxbufsize = *(ber_len_t *)arg;
1046                 break;
1047
1048         case LDAP_OPT_X_SASL_SECPROPS: {
1049                 int sc;
1050                 sc = ldap_pvt_sasl_secprops( (char *) arg,
1051                         &ld->ld_options.ldo_sasl_secprops );
1052
1053                 return sc == LDAP_SUCCESS ? 0 : -1;
1054                 }
1055
1056         default:
1057                 return -1;
1058         }
1059         return 0;
1060 }
1061
1062 #ifdef LDAP_R_COMPILE
1063 void *ldap_pvt_sasl_mutex_new(void)
1064 {
1065         ldap_pvt_thread_mutex_t *mutex;
1066
1067         mutex = (ldap_pvt_thread_mutex_t *) LDAP_MALLOC(
1068                 sizeof(ldap_pvt_thread_mutex_t) );
1069
1070         if ( ldap_pvt_thread_mutex_init( mutex ) == 0 ) {
1071                 return mutex;
1072         }
1073         return NULL;
1074 }
1075
1076 int ldap_pvt_sasl_mutex_lock(void *mutex)
1077 {
1078         return ldap_pvt_thread_mutex_lock( (ldap_pvt_thread_mutex_t *)mutex )
1079                 ? SASL_FAIL : SASL_OK;
1080 }
1081
1082 int ldap_pvt_sasl_mutex_unlock(void *mutex)
1083 {
1084         return ldap_pvt_thread_mutex_unlock( (ldap_pvt_thread_mutex_t *)mutex )
1085                 ? SASL_FAIL : SASL_OK;
1086 }
1087
1088 void ldap_pvt_sasl_mutex_dispose(void *mutex)
1089 {
1090         (void) ldap_pvt_thread_mutex_destroy( (ldap_pvt_thread_mutex_t *)mutex );
1091         LDAP_FREE( mutex );
1092 }
1093 #endif
1094
1095 #else
1096 int ldap_int_sasl_init( void )
1097 { return LDAP_SUCCESS; }
1098
1099 int ldap_int_sasl_close( LDAP *ld, LDAPConn *lc )
1100 { return LDAP_SUCCESS; }
1101
1102 int
1103 ldap_int_sasl_bind(
1104         LDAP                    *ld,
1105         const char              *dn,
1106         const char              *mechs,
1107         LDAPControl             **sctrls,
1108         LDAPControl             **cctrls,
1109         unsigned                flags,
1110         LDAP_SASL_INTERACT_PROC *interact,
1111         void * defaults )
1112 { return LDAP_NOT_SUPPORTED; }
1113
1114 int
1115 ldap_int_sasl_external(
1116         LDAP *ld,
1117         LDAPConn *conn,
1118         const char * authid,
1119         ber_len_t ssf )
1120 { return LDAP_SUCCESS; }
1121
1122 #endif /* HAVE_CYRUS_SASL */