git.sur5r.net Git - openldap/blob - servers/slapd/sasl.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 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 #include <ac/stdlib.h>
  11 #include <ac/string.h>
  12
  13 #include <lber.h>
  14 #include <ldap_log.h>
  15
  16 #include "slap.h"
  17
  18 #ifdef HAVE_CYRUS_SASL
  19 #include <limits.h>
  20
  21 #ifdef HAVE_SASL_SASL_H
  22 #include <sasl/sasl.h>
  23 #else
  24 #include <sasl.h>
  25 #endif
  26
  27 #if SASL_VERSION_MAJOR >= 2
  28 #include <lutil.h>
  29 #define SASL_CONST const
  30 #else
  31 #define SASL_CONST
  32 #endif
  33
  34 #include <ldap_pvt.h>
  35
  36 #ifdef SLAPD_SPASSWD
  37 #include <lutil.h>
  38 #endif
  39
  40 /* Flags for telling slap_sasl_getdn() what type of identity is being passed */
  41 #define FLAG_GETDN_FINAL   1
  42 #define FLAG_GETDN_AUTHCID 2
  43 #define FLAG_GETDN_AUTHZID 4
  44
  45 static sasl_security_properties_t sasl_secprops;
  46
  47 static int
  48 slap_sasl_log(
  49         void *context,
  50         int priority,
  51         const char *message)
  52 {
  53         Connection *conn = context;
  54         int level;
  55         const char * label;
  56
  57         if ( message == NULL ) {
  58                 return SASL_BADPARAM;
  59         }
  60
  61         switch (priority) {
  62 #if SASL_VERSION_MAJOR >= 2
  63         case SASL_LOG_NONE:
  64                 level = LDAP_DEBUG_NONE;
  65                 label = "None";
  66                 break;
  67         case SASL_LOG_ERR:
  68                 level = LDAP_DEBUG_ANY;
  69                 label = "Error";
  70                 break;
  71         case SASL_LOG_FAIL:
  72                 level = LDAP_DEBUG_ANY;
  73                 label = "Failure";
  74                 break;
  75         case SASL_LOG_WARN:
  76                 level = LDAP_DEBUG_TRACE;
  77                 label = "Warning";
  78                 break;
  79         case SASL_LOG_NOTE:
  80                 level = LDAP_DEBUG_TRACE;
  81                 label = "Notice";
  82                 break;
  83         case SASL_LOG_DEBUG:
  84                 level = LDAP_DEBUG_TRACE;
  85                 label = "Debug";
  86                 break;
  87         case SASL_LOG_TRACE:
  88                 level = LDAP_DEBUG_TRACE;
  89                 label = "Trace";
  90                 break;
  91         case SASL_LOG_PASS:
  92                 level = LDAP_DEBUG_TRACE;
  93                 label = "Password Trace";
  94                 break;
  95 #else
  96         case SASL_LOG_ERR:
  97                 level = LDAP_DEBUG_ANY;
  98                 label = "Error";
  99                 break;
 100         case SASL_LOG_WARNING:
 101                 level = LDAP_DEBUG_TRACE;
 102                 label = "Warning";
 103                 break;
 104         case SASL_LOG_INFO:
 105                 level = LDAP_DEBUG_TRACE;
 106                 label = "Info";
 107                 break;
 108 #endif
 109         default:
 110                 return SASL_BADPARAM;
 111         }
 112
 113 #ifdef NEW_LOGGING
 114         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 115                 "SASL [conn=%ld] %s: %s\n",
 116                 conn ? conn->c_connid : -1,
 117                 label, message ));
 118 #else
 119         Debug( level, "SASL [conn=%ld] %s: %s\n",
 120                 conn ? conn->c_connid: -1,
 121                 label, message );
 122 #endif
 123
 124
 125         return SASL_OK;
 126 }
 127
 128
 129 /* Take any sort of identity string and return a DN with the "dn:" prefix. The
 130    string returned in *dn is in its own allocated memory, and must be free'd
 131    by the calling process.
 132    -Mark Adamson, Carnegie Mellon
 133 */
 134
 135 #define SET_DN  1
 136 #define SET_U   2
 137
 138 static struct berval ext_bv = { sizeof("EXTERNAL")-1, "EXTERNAL" };
 139
 140 int slap_sasl_getdn( Connection *conn, char *id,
 141         char *user_realm, struct berval *dn, int flags )
 142 {
 143         char *c1;
 144         int rc, len, is_dn = 0;
 145         sasl_conn_t *ctx;
 146         struct berval dn2;
 147
 148 #ifdef NEW_LOGGING
 149         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 150                 "slap_sasl_getdn: conn %d id=%s\n",
 151                 conn ? conn->c_connid : -1,
 152                 id ? (*id ? id : "<empty>") : "NULL" ));
 153 #else
 154         Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: id=%s\n",
 155       id?(*id?id:"<empty>"):"NULL",0,0 );
 156 #endif
 157
 158         dn->bv_val = NULL;
 159         dn->bv_len = 0;
 160
 161         /* Blatantly anonymous ID */
 162         if( id &&
 163                 ( id[sizeof( "anonymous" )-1] == '\0'
 164                         || id[sizeof( "anonymous" )-1] == '@' ) &&
 165                 !strncasecmp( id, "anonymous", sizeof( "anonymous" )-1) ) {
 166                 return( LDAP_SUCCESS );
 167         }
 168         ctx = conn->c_sasl_context;
 169         len = strlen( id );
 170
 171         /* An authcID needs to be converted to authzID form */
 172         if( flags & FLAG_GETDN_AUTHCID ) {
 173                 if( sasl_external_x509dn_convert
 174                         && conn->c_sasl_bind_mech.bv_len == ext_bv.bv_len
 175                         && ( strcasecmp( ext_bv.bv_val, conn->c_sasl_bind_mech.bv_val ) == 0 )
 176                         && id[0] == '/' )
 177                 {
 178                         /* check SASL external for X.509 style DN and */
 179                         /* convert to dn:<dn> form */
 180                         dn->bv_val = ldap_dcedn2dn( id );
 181                         dn->bv_len = strlen(dn->bv_val);
 182                         is_dn = SET_DN;
 183
 184                 } else {
 185                         /* convert to u:<username> form */
 186                         ber_str2bv( id, len, 1, dn );
 187                         is_dn = SET_U;
 188                 }
 189         }
 190         if( !is_dn ) {
 191                 if( !strncasecmp( id, "u:", sizeof("u:")-1 )) {
 192                         is_dn = SET_U;
 193                         ber_str2bv( id+2, len-2, 1, dn );
 194                 } else if ( !strncasecmp( id, "dn:", sizeof("dn:")-1) ) {
 195                         is_dn = SET_DN;
 196                         ber_str2bv( id+3, len-3, 1, dn );
 197                 }
 198         }
 199
 200         /* An authzID must be properly prefixed */
 201         if( (flags & FLAG_GETDN_AUTHZID) && !is_dn ) {
 202                 free( dn->bv_val );
 203                 dn->bv_val = NULL;
 204                 dn->bv_len = 0;
 205                 return( LDAP_INAPPROPRIATE_AUTH );
 206         }
 207
 208         /* Username strings */
 209         if( is_dn == SET_U ) {
 210                 char *p;
 211                 len = dn->bv_len + sizeof("uid=")-1 + sizeof(",cn=auth")-1;
 212
 213                 if( user_realm && *user_realm ) {
 214                         len += strlen( user_realm ) + sizeof(",cn=")-1;
 215                 }
 216
 217                 if( conn->c_sasl_bind_mech.bv_len ) {
 218                         len += conn->c_sasl_bind_mech.bv_len + sizeof(",cn=")-1;
 219                 }
 220
 221                 /* Build the new dn */
 222                 c1 = dn->bv_val;
 223                 dn->bv_val = ch_malloc( len );
 224                 p = slap_strcopy( dn->bv_val, "uid=" );
 225                 p = slap_strcopy( p, c1 );
 226                 ch_free( c1 );
 227
 228                 if( user_realm && *user_realm ) {
 229                         p = slap_strcopy( p, ",cn=" );
 230                         p = slap_strcopy( p, user_realm );
 231                 }
 232                 if( conn->c_sasl_bind_mech.bv_len ) {
 233                         p = slap_strcopy( p, ",cn=" );
 234                         p = slap_strcopy( p, conn->c_sasl_bind_mech.bv_val );
 235                 }
 236                 p = slap_strcopy( p, ",cn=auth" );
 237                 dn->bv_len = p - dn->bv_val;
 238                 is_dn = SET_DN;
 239
 240 #ifdef NEW_LOGGING
 241                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 242                         "slap_sasl_getdn: u:id converted to %s.\n", dn->bv_val ));
 243 #else
 244                 Debug( LDAP_DEBUG_TRACE, "getdn: u:id converted to %s\n", dn->bv_val,0,0 );
 245 #endif
 246         }
 247
 248         /* DN strings that are a cn=auth identity to run through regexp */
 249         if( is_dn == SET_DN && ( ( flags & FLAG_GETDN_FINAL ) == 0 ) )
 250         {
 251                 slap_sasl2dn( dn, &dn2 );
 252                 if( dn2.bv_val ) {
 253                         ch_free( dn->bv_val );
 254                         *dn = dn2;
 255 #ifdef NEW_LOGGING
 256                         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 257                                 "slap_sasl_getdn: dn:id converted to %s.\n", dn->bv_val ));
 258 #else
 259                         Debug( LDAP_DEBUG_TRACE, "getdn: dn:id converted to %s\n",
 260                                 dn->bv_val, 0, 0 );
 261 #endif
 262                 }
 263         }
 264
 265         if( flags & FLAG_GETDN_FINAL ) {
 266                 /* omit "dn:" prefix */
 267                 is_dn = 0;
 268         } else {
 269                 rc = dnNormalize2( NULL, dn, &dn2 );
 270                 free(dn->bv_val);
 271                 if ( rc != LDAP_SUCCESS ) {
 272                         *dn = slap_empty_bv;
 273                         return rc;
 274                 }
 275                 *dn = dn2;
 276         }
 277
 278         /* Attach the "dn:" prefix if needed */
 279         if ( is_dn == SET_DN ) {
 280                 c1 = ch_malloc( dn->bv_len + sizeof("dn:") );
 281                 strcpy( c1, "dn:" );
 282                 strcpy( c1 + 3, dn->bv_val );
 283                 free( dn->bv_val );
 284                 dn->bv_val = c1;
 285                 dn->bv_len += 3;
 286         }
 287
 288         return( LDAP_SUCCESS );
 289 }
 290
 291 #if SASL_VERSION_MAJOR >= 2
 292 static int
 293 slap_sasl_checkpass(
 294         sasl_conn_t *sconn,
 295         void *context,
 296         const char *username,
 297         const char *pass,
 298         unsigned passlen,
 299         struct propctx *propctx)
 300 {
 301         Connection *conn = (Connection *)context;
 302         struct berval dn, cred;
 303         int rc;
 304         BerVarray vals, bv;
 305
 306         cred.bv_val = (char *)pass;
 307         cred.bv_len = passlen;
 308
 309         /* XXX do we need to check sasldb as well? */
 310
 311         /* XXX can we do both steps at once? */
 312         rc = slap_sasl_getdn( conn, (char *)username, NULL, &dn,
 313                 FLAG_GETDN_AUTHCID | FLAG_GETDN_FINAL );
 314         if ( rc != LDAP_SUCCESS ) {
 315                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 316                 return SASL_NOUSER;
 317         }
 318
 319         if ( dn.bv_len == 0 ) {
 320                 sasl_seterror( sconn, 0,
 321                         "No password is associated with the Root DSE" );
 322                 if ( dn.bv_val != NULL ) {
 323                         ch_free( dn.bv_val );
 324                 }
 325                 return SASL_NOUSER;
 326         }
 327
 328         rc = backend_attribute( NULL, NULL, NULL, NULL, &dn,
 329                 slap_schema.si_ad_userPassword, &vals);
 330         if ( rc != LDAP_SUCCESS ) {
 331                 ch_free( dn.bv_val );
 332                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 333                 return SASL_NOVERIFY;
 334         }
 335
 336         rc = SASL_NOVERIFY;
 337
 338         if ( vals != NULL ) {
 339                 for ( bv = vals; bv->bv_val != NULL; bv++ ) {
 340                         if ( !lutil_passwd( bv, &cred, NULL ) ) {
 341                                 rc = SASL_OK;
 342                                 break;
 343                         }
 344                 }
 345                 ber_bvarray_free( vals );
 346         }
 347
 348         if ( rc != SASL_OK ) {
 349                 sasl_seterror( sconn, 0,
 350                         ldap_err2string( LDAP_INVALID_CREDENTIALS ) );
 351         }
 352
 353         ch_free( dn.bv_val );
 354
 355         return rc;
 356 }
 357
 358 static int
 359 slap_sasl_canonicalize(
 360         sasl_conn_t *sconn,
 361         void *context,
 362         const char *in,
 363         unsigned inlen,
 364         unsigned flags,
 365         const char *user_realm,
 366         char *out,
 367         unsigned out_max,
 368         unsigned *out_len)
 369 {
 370         Connection *conn = (Connection *)context;
 371         struct berval dn;
 372         int rc;
 373
 374         *out_len = 0;
 375
 376 #ifdef NEW_LOGGING
 377         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 378                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 379                         conn ? conn->c_connid : -1,
 380                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 381                         in ? in : "<empty>" ));
 382 #else
 383         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 384                 "%s=\"%s\"\n",
 385                         conn ? conn->c_connid : -1,
 386                         (flags == SASL_CU_AUTHID) ? "authcid" : "authzid",
 387                         in ? in : "<empty>" );
 388 #endif
 389
 390         rc = slap_sasl_getdn( conn, (char *)in, (char *)user_realm, &dn,
 391                 (flags == SASL_CU_AUTHID) ? FLAG_GETDN_AUTHCID : FLAG_GETDN_AUTHZID );
 392         if ( rc != LDAP_SUCCESS ) {
 393                 sasl_seterror( sconn, 0, ldap_err2string( rc ) );
 394                 return SASL_NOAUTHZ;
 395         }
 396
 397         if ( out_max < dn.bv_len ) {
 398                 return SASL_BUFOVER;
 399         }
 400
 401         AC_MEMCPY( out, dn.bv_val, dn.bv_len );
 402         out[dn.bv_len] = '\0';
 403
 404         *out_len = dn.bv_len;
 405
 406         ch_free( dn.bv_val );
 407
 408 #ifdef NEW_LOGGING
 409         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 410                 "slap_sasl_canonicalize: conn %d %s=\"%s\"\n",
 411                         conn ? conn->c_connid : -1,
 412                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 413                         out ));
 414 #else
 415         Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: "
 416                 "%s=\"%s\"\n",
 417                         conn ? conn->c_connid : -1,
 418                         (flags == SASL_CU_AUTHID) ? "authcDN" : "authzDN",
 419                         out );
 420 #endif
 421
 422         return SASL_OK;
 423 }
 424
 425 static int
 426 slap_sasl_authorize(
 427         sasl_conn_t *sconn,
 428         void *context,
 429         const char *requested_user,
 430         unsigned rlen,
 431         const char *auth_identity,
 432         unsigned alen,
 433         const char *def_realm,
 434         unsigned urlen,
 435         struct propctx *propctx)
 436 {
 437         Connection *conn = (Connection *)context;
 438         struct berval authcDN, authzDN;
 439         int rc;
 440
 441         authcDN.bv_val = (char *)auth_identity;
 442         authcDN.bv_len = alen;
 443
 444         authzDN.bv_val = (char *)requested_user;
 445         authzDN.bv_len = rlen;
 446
 447 #ifdef NEW_LOGGING
 448         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 449                 "slap_sasl_authorize: conn %d authcDN=\"%s\" authzDN=\"%s\"\n",
 450                         conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val));
 451 #else
 452         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 453                 "authcDN=\"%s\" authzDN=\"%s\"\n",
 454                 conn ? conn->c_connid : -1, authcDN.bv_val, authzDN.bv_val );
 455 #endif
 456
 457         rc = slap_sasl_authorized( &authcDN, &authzDN );
 458         if ( rc != LDAP_SUCCESS ) {
 459 #ifdef NEW_LOGGING
 460                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 461                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 462                            (long)(conn ? conn->c_connid : -1), rc ));
 463 #else
 464                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 465                         " authorization disallowed (%d)\n",
 466                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 467 #endif
 468
 469                 sasl_seterror( sconn, 0, "not authorized" );
 470                 return SASL_NOAUTHZ;
 471         }
 472
 473 #ifdef NEW_LOGGING
 474         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 475                    "slap_sasl_authorize: conn %d authorization allowed\n",
 476                    (long)(conn ? conn->c_connid : -1 ) ));
 477 #else
 478         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 479                 " authorization allowed\n",
 480                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 481 #endif
 482
 483         return SASL_OK;
 484 }
 485 #else
 486 static int
 487 slap_sasl_authorize(
 488         void *context,
 489         const char *authcid,
 490         const char *authzid,
 491         const char **user,
 492         const char **errstr)
 493 {
 494         struct berval authcDN, authzDN;
 495         int rc;
 496         Connection *conn = context;
 497         char *realm;
 498
 499         *user = NULL;
 500
 501 #ifdef NEW_LOGGING
 502         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 503                    "slap_sasl_authorize: conn %d         authcid=\"%s\" authzid=\"%s\"\n",
 504                    conn ? conn->c_connid : -1,
 505                    authcid ? authcid : "<empty>",
 506                    authzid ? authzid : "<empty>" ));
 507 #else
 508         Debug( LDAP_DEBUG_ARGS, "SASL Authorize [conn=%ld]: "
 509                 "authcid=\"%s\" authzid=\"%s\"\n",
 510                 (long) (conn ? conn->c_connid : -1),
 511                 authcid ? authcid : "<empty>",
 512                 authzid ? authzid : "<empty>" );
 513 #endif
 514
 515         /* Figure out how much data we have for the dn */
 516         rc = sasl_getprop( conn->c_sasl_context, SASL_REALM, (void **)&realm );
 517         if( rc != SASL_OK && rc != SASL_NOTDONE ) {
 518 #ifdef NEW_LOGGING
 519                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 520                         "slap_sasl_authorize: getprop(REALM) failed.\n" ));
 521 #else
 522                 Debug(LDAP_DEBUG_TRACE,
 523                         "authorize: getprop(REALM) failed!\n", 0,0,0);
 524 #endif
 525                 *errstr = "Could not extract realm";
 526                 return SASL_NOAUTHZ;
 527         }
 528
 529         /* Convert the identities to DN's. If no authzid was given, client will
 530            be bound as the DN matching their username */
 531         rc = slap_sasl_getdn( conn, (char *)authcid, realm, &authcDN, FLAG_GETDN_AUTHCID );
 532         if( rc != LDAP_SUCCESS ) {
 533                 *errstr = ldap_err2string( rc );
 534                 return SASL_NOAUTHZ;
 535         }
 536         if( ( authzid == NULL ) || !strcmp( authcid,authzid ) ) {
 537 #ifdef NEW_LOGGING
 538                 LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 539                            "slap_sasl_authorize: conn %d  Using authcDN=%s\n",
 540                            conn ? conn->c_connid : -1, authcDN.bv_val ));
 541 #else
 542                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 543                  "Using authcDN=%s\n", (long) (conn ? conn->c_connid : -1), authcDN.bv_val,0 );
 544 #endif
 545
 546                 *user = authcDN.bv_val;
 547                 *errstr = NULL;
 548                 return SASL_OK;
 549         }
 550         rc = slap_sasl_getdn( conn, (char *)authzid, realm, &authzDN, FLAG_GETDN_AUTHZID );
 551         if( rc != LDAP_SUCCESS ) {
 552                 ch_free( authcDN.bv_val );
 553                 *errstr = ldap_err2string( rc );
 554                 return SASL_NOAUTHZ;
 555         }
 556
 557         rc = slap_sasl_authorized( &authcDN, &authzDN );
 558         if( rc ) {
 559 #ifdef NEW_LOGGING
 560                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 561                            "slap_sasl_authorize: conn %ld  authorization disallowed (%d)\n",
 562                            (long)(conn ? conn->c_connid : -1), rc ));
 563 #else
 564                 Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 565                         " authorization disallowed (%d)\n",
 566                         (long) (conn ? conn->c_connid : -1), rc, 0 );
 567 #endif
 568
 569                 *errstr = "not authorized";
 570                 ch_free( authcDN.bv_val );
 571                 ch_free( authzDN.bv_val );
 572                 return SASL_NOAUTHZ;
 573         }
 574
 575 #ifdef NEW_LOGGING
 576         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 577                    "slap_sasl_authorize: conn %d authorization allowed\n",
 578                    (long)(conn ? conn->c_connid : -1 ) ));
 579 #else
 580         Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
 581                 " authorization allowed\n",
 582                 (long) (conn ? conn->c_connid : -1), 0, 0 );
 583 #endif
 584
 585
 586         ch_free( authcDN.bv_val );
 587         *user = authzDN.bv_val;
 588         *errstr = NULL;
 589         return SASL_OK;
 590 }
 591 #endif /* SASL_VERSION_MAJOR >= 2 */
 592
 593 static int
 594 slap_sasl_err2ldap( int saslerr )
 595 {
 596         int rc;
 597
 598         switch (saslerr) {
 599                 case SASL_CONTINUE:
 600                         rc = LDAP_SASL_BIND_IN_PROGRESS;
 601                         break;
 602                 case SASL_FAIL:
 603                         rc = LDAP_OTHER;
 604                         break;
 605                 case SASL_NOMEM:
 606                         rc = LDAP_OTHER;
 607                         break;
 608                 case SASL_NOMECH:
 609                         rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 610                         break;
 611                 case SASL_BADAUTH:
 612                         rc = LDAP_INVALID_CREDENTIALS;
 613                         break;
 614                 case SASL_NOAUTHZ:
 615                         rc = LDAP_INSUFFICIENT_ACCESS;
 616                         break;
 617                 case SASL_TOOWEAK:
 618                 case SASL_ENCRYPT:
 619                         rc = LDAP_INAPPROPRIATE_AUTH;
 620                         break;
 621                 default:
 622                         rc = LDAP_OTHER;
 623                         break;
 624         }
 625
 626         return rc;
 627 }
 628 #endif
 629
 630
 631 int slap_sasl_init( void )
 632 {
 633 #ifdef HAVE_CYRUS_SASL
 634         int rc;
 635         static sasl_callback_t server_callbacks[] = {
 636                 { SASL_CB_LOG, &slap_sasl_log, NULL },
 637                 { SASL_CB_LIST_END, NULL, NULL }
 638         };
 639
 640         sasl_set_alloc(
 641                 ch_malloc,
 642                 ch_calloc,
 643                 ch_realloc,
 644                 ch_free );
 645
 646         sasl_set_mutex(
 647                 ldap_pvt_sasl_mutex_new,
 648                 ldap_pvt_sasl_mutex_lock,
 649                 ldap_pvt_sasl_mutex_unlock,
 650                 ldap_pvt_sasl_mutex_dispose );
 651
 652         /* should provide callbacks for logging */
 653         /* server name should be configurable */
 654         rc = sasl_server_init( server_callbacks, "slapd" );
 655
 656         if( rc != SASL_OK ) {
 657 #ifdef NEW_LOGGING
 658                 LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 659                            "slap_sasl_init: init failed.\n" ));
 660 #else
 661                 Debug( LDAP_DEBUG_ANY, "sasl_server_init failed\n",
 662                         0, 0, 0 );
 663 #endif
 664
 665                 return -1;
 666         }
 667
 668 #ifdef NEW_LOGGING
 669         LDAP_LOG(( "sasl", LDAP_LEVEL_INFO,
 670                    "slap_sasl_init: initialized!\n"));
 671 #else
 672         Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
 673                 0, 0, 0 );
 674 #endif
 675
 676
 677         /* default security properties */
 678         memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
 679         sasl_secprops.max_ssf = INT_MAX;
 680         sasl_secprops.maxbufsize = 65536;
 681         sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
 682 #endif
 683
 684         return 0;
 685 }
 686
 687 int slap_sasl_destroy( void )
 688 {
 689 #ifdef HAVE_CYRUS_SASL
 690         sasl_done();
 691 #endif
 692         free( global_host );
 693         global_host = NULL;
 694
 695         return 0;
 696 }
 697
 698 int slap_sasl_open( Connection *conn )
 699 {
 700         int cb, sc = LDAP_SUCCESS;
 701 #if SASL_VERSION_MAJOR >= 2
 702         char *ipremoteport = NULL, *iplocalport = NULL;
 703 #endif
 704
 705 #ifdef HAVE_CYRUS_SASL
 706         sasl_conn_t *ctx = NULL;
 707         sasl_callback_t *session_callbacks;
 708
 709         assert( conn->c_sasl_context == NULL );
 710         assert( conn->c_sasl_extra == NULL );
 711
 712         conn->c_sasl_layers = 0;
 713
 714         session_callbacks =
 715 #if SASL_VERSION_MAJOR >= 2
 716                 ch_calloc( 5, sizeof(sasl_callback_t));
 717 #else
 718                 ch_calloc( 3, sizeof(sasl_callback_t));
 719 #endif
 720         conn->c_sasl_extra = session_callbacks;
 721
 722         session_callbacks[cb=0].id = SASL_CB_LOG;
 723         session_callbacks[cb].proc = &slap_sasl_log;
 724         session_callbacks[cb++].context = conn;
 725
 726         session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
 727         session_callbacks[cb].proc = &slap_sasl_authorize;
 728         session_callbacks[cb++].context = conn;
 729
 730 #if SASL_VERSION_MAJOR >= 2
 731         session_callbacks[cb].id = SASL_CB_CANON_USER;
 732         session_callbacks[cb].proc = &slap_sasl_canonicalize;
 733         session_callbacks[cb++].context = conn;
 734
 735         /* XXXX: this should be conditional */
 736         session_callbacks[cb].id = SASL_CB_SERVER_USERDB_CHECKPASS;
 737         session_callbacks[cb].proc = &slap_sasl_checkpass;
 738         session_callbacks[cb++].context = conn;
 739 #endif
 740
 741         session_callbacks[cb].id = SASL_CB_LIST_END;
 742         session_callbacks[cb].proc = NULL;
 743         session_callbacks[cb++].context = NULL;
 744
 745         if( global_host == NULL ) {
 746                 global_host = ldap_pvt_get_fqdn( NULL );
 747         }
 748
 749         /* create new SASL context */
 750 #if SASL_VERSION_MAJOR >= 2
 751         if ( conn->c_sock_name.bv_len != 0 &&
 752              strncmp( conn->c_sock_name.bv_val, "IP=", 3 ) == 0) {
 753                 char *p;
 754
 755                 iplocalport = ch_strdup( conn->c_sock_name.bv_val + 3 );
 756                 /* Convert IPv6 addresses to address;port syntax. */
 757                 p = strrchr( iplocalport, ' ' );
 758                 if ( p != NULL ) {
 759                         *p = ';';
 760                 }
 761         }
 762         if ( conn->c_peer_name.bv_len != 0 &&
 763              strncmp( conn->c_peer_name.bv_val, "IP=", 3 ) == 0) {
 764                 char *p;
 765
 766                 ipremoteport = ch_strdup( conn->c_peer_name.bv_val + 3 );
 767                 /* Convert IPv6 addresses to address;port syntax. */
 768                 p = strrchr( ipremoteport, ' ' );
 769                 if ( p != NULL ) {
 770                         *p = ';';
 771                 }
 772         }
 773         sc = sasl_server_new( "ldap", global_host, global_realm,
 774                 iplocalport, ipremoteport, session_callbacks, 0, &ctx );
 775         if ( iplocalport != NULL ) {
 776                 ch_free( iplocalport );
 777         }
 778         if ( ipremoteport != NULL ) {
 779                 ch_free( ipremoteport );
 780         }
 781 #else
 782         sc = sasl_server_new( "ldap", global_host, global_realm,
 783                 session_callbacks, SASL_SECURITY_LAYER, &ctx );
 784 #endif
 785
 786         if( sc != SASL_OK ) {
 787 #ifdef NEW_LOGGING
 788                 LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 789                            "slap_sasl_open: sasl_server_new failed: %d\n", sc ));
 790 #else
 791                 Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
 792                         sc, 0, 0 );
 793 #endif
 794
 795                 return -1;
 796         }
 797
 798         conn->c_sasl_context = ctx;
 799
 800         if( sc == SASL_OK ) {
 801                 sc = sasl_setprop( ctx,
 802                         SASL_SEC_PROPS, &sasl_secprops );
 803
 804                 if( sc != SASL_OK ) {
 805 #ifdef NEW_LOGGING
 806                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 807                                    "slap_sasl_open: sasl_setprop failed: %d \n", sc ));
 808 #else
 809                         Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
 810                                 sc, 0, 0 );
 811 #endif
 812
 813                         slap_sasl_close( conn );
 814                         return -1;
 815                 }
 816         }
 817
 818         sc = slap_sasl_err2ldap( sc );
 819 #endif
 820         return sc;
 821 }
 822
 823 int slap_sasl_external(
 824         Connection *conn,
 825         slap_ssf_t ssf,
 826         const char *auth_id )
 827 {
 828 #if SASL_VERSION_MAJOR >= 2
 829         int sc;
 830         sasl_conn_t *ctx = conn->c_sasl_context;
 831
 832         if ( ctx == NULL ) {
 833                 return LDAP_UNAVAILABLE;
 834         }
 835
 836         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
 837
 838         if ( sc != SASL_OK ) {
 839                 return LDAP_OTHER;
 840         }
 841
 842         sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL, auth_id );
 843
 844         if ( sc != SASL_OK ) {
 845                 return LDAP_OTHER;
 846         }
 847
 848 #elif defined(HAVE_CYRUS_SASL)
 849         int sc;
 850         sasl_conn_t *ctx = conn->c_sasl_context;
 851         sasl_external_properties_t extprops;
 852
 853         if ( ctx == NULL ) {
 854                 return LDAP_UNAVAILABLE;
 855         }
 856
 857         memset( &extprops, '\0', sizeof(extprops) );
 858         extprops.ssf = ssf;
 859         extprops.auth_id = (char *) auth_id;
 860
 861         sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL,
 862                 (void *) &extprops );
 863
 864         if ( sc != SASL_OK ) {
 865                 return LDAP_OTHER;
 866         }
 867 #endif
 868
 869         return LDAP_SUCCESS;
 870 }
 871
 872 int slap_sasl_reset( Connection *conn )
 873 {
 874 #ifdef HAVE_CYRUS_SASL
 875         sasl_conn_t *ctx = conn->c_sasl_context;
 876
 877         if( ctx != NULL ) {
 878         }
 879 #endif
 880         /* must return "anonymous" */
 881         return LDAP_SUCCESS;
 882 }
 883
 884 char ** slap_sasl_mechs( Connection *conn )
 885 {
 886         char **mechs = NULL;
 887
 888 #ifdef HAVE_CYRUS_SASL
 889         sasl_conn_t *ctx = conn->c_sasl_context;
 890
 891         if( ctx != NULL ) {
 892                 int sc;
 893                 SASL_CONST char *mechstr;
 894
 895                 sc = sasl_listmech( ctx,
 896                         NULL, NULL, ",", NULL,
 897                         &mechstr, NULL, NULL );
 898
 899                 if( sc != SASL_OK ) {
 900 #ifdef NEW_LOGGING
 901                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
 902                                 "slap_sasl_mechs: sasl_listmech failed: %d\n", sc ));
 903 #else
 904                         Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
 905                                 sc, 0, 0 );
 906 #endif
 907
 908                         return NULL;
 909                 }
 910
 911                 mechs = str2charray( mechstr, "," );
 912
 913 #if SASL_VERSION_MAJOR < 2
 914                 ch_free( mechstr );
 915 #endif
 916         }
 917 #endif
 918
 919         return mechs;
 920 }
 921
 922 int slap_sasl_close( Connection *conn )
 923 {
 924 #ifdef HAVE_CYRUS_SASL
 925         sasl_conn_t *ctx = conn->c_sasl_context;
 926
 927         if( ctx != NULL ) {
 928                 sasl_dispose( &ctx );
 929         }
 930
 931         conn->c_sasl_context = NULL;
 932
 933         free( conn->c_sasl_extra );
 934         conn->c_sasl_extra = NULL;
 935 #endif
 936
 937         return LDAP_SUCCESS;
 938 }
 939
 940 int slap_sasl_bind(
 941     Connection          *conn,
 942     Operation           *op,
 943     struct berval       *dn,
 944     struct berval       *ndn,
 945     struct berval       *cred,
 946         struct berval                   *edn,
 947         slap_ssf_t              *ssfp )
 948 {
 949         int rc = 1;
 950
 951 #ifdef HAVE_CYRUS_SASL
 952         sasl_conn_t *ctx = conn->c_sasl_context;
 953         struct berval response;
 954         unsigned reslen = 0;
 955         const char *errstr = NULL;
 956         int sc;
 957
 958 #ifdef NEW_LOGGING
 959         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
 960                 "sasl_bind: conn %ld dn=\"%s\" mech=%s datalen=%ld\n",
 961                 conn->c_connid,
 962                 dn->bv_len ? dn->bv_val : "",
 963                 conn->c_sasl_bind_in_progress ? "<continuing>" : conn->c_sasl_bind_mech.bv_val,
 964                 cred ? cred->bv_len : 0 ));
 965 #else
 966         Debug(LDAP_DEBUG_ARGS,
 967                 "==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
 968                 dn->bv_len ? dn->bv_val : "",
 969                 conn->c_sasl_bind_in_progress ? "<continuing>":conn->c_sasl_bind_mech.bv_val,
 970                 cred ? cred->bv_len : 0 );
 971 #endif
 972
 973
 974         if( ctx == NULL ) {
 975                 send_ldap_result( conn, op, LDAP_UNAVAILABLE,
 976                         NULL, "SASL unavailable on this session", NULL, NULL );
 977                 return rc;
 978         }
 979
 980 #if SASL_VERSION_MAJOR >= 2
 981 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 982         sasl_server_start( ctx, mech, cred, clen, resp, rlen )
 983 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 984         sasl_server_step( ctx, cred, clen, resp, rlen )
 985 #else
 986 #define START( ctx, mech, cred, clen, resp, rlen, err ) \
 987         sasl_server_start( ctx, mech, cred, clen, resp, rlen, err )
 988 #define STEP( ctx, cred, clen, resp, rlen, err ) \
 989         sasl_server_step( ctx, cred, clen, resp, rlen, err )
 990 #endif
 991
 992         if ( !conn->c_sasl_bind_in_progress ) {
 993                 sc = START( ctx,
 994                         conn->c_sasl_bind_mech.bv_val,
 995                         cred->bv_len ? cred->bv_val : "",
 996                         cred->bv_len,
 997                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
 998
 999         } else {
1000                 sc = STEP( ctx,
1001                         cred->bv_val, cred->bv_len,
1002                         (SASL_CONST char **)&response.bv_val, &reslen, &errstr );
1003         }
1004
1005         response.bv_len = reslen;
1006
1007         if ( sc == SASL_OK ) {
1008                 char *username = NULL;
1009                 char *realm = NULL;
1010
1011 #if SASL_VERSION_MAJOR >= 2
1012                 sc = sasl_getprop( ctx, SASL_DEFUSERREALM, (const void **)&realm );
1013 #else
1014                 sc = sasl_getprop( ctx, SASL_REALM, (void **)&realm );
1015 #endif
1016                 sc = sasl_getprop( ctx,
1017                         SASL_USERNAME, (SASL_CONST void **)&username );
1018
1019                 if ( sc != SASL_OK ) {
1020 #ifdef NEW_LOGGING
1021                         LDAP_LOG(( "sasl", LDAP_LEVEL_ERR,
1022                                 "slap_sasl_bind: getprop(USERNAME) failed: %d\n", sc ));
1023 #else
1024                         Debug(LDAP_DEBUG_TRACE,
1025                                 "slap_sasl_bind: getprop(USERNAME) failed!\n",
1026                                 0, 0, 0);
1027 #endif
1028
1029
1030                         send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1031                                 NULL, "no SASL username", NULL, NULL );
1032
1033                 } else {
1034                         rc = slap_sasl_getdn( conn, username, realm, edn, FLAG_GETDN_FINAL );
1035
1036                         if( rc == LDAP_SUCCESS ) {
1037                                 sasl_ssf_t *ssf = NULL;
1038                                 (void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
1039                                 *ssfp = ssf ? *ssf : 0;
1040
1041                                 if( *ssfp ) {
1042                                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1043                                         conn->c_sasl_layers++;
1044                                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1045                                 }
1046
1047                                 send_ldap_sasl( conn, op, rc,
1048                                         NULL, NULL, NULL, NULL,
1049                                         response.bv_len ? &response : NULL );
1050
1051                         } else {
1052                                 send_ldap_result( conn, op, rc,
1053                                         NULL, errstr, NULL, NULL );
1054                         }
1055                 }
1056
1057         } else if ( sc == SASL_CONTINUE ) {
1058                 send_ldap_sasl( conn, op, rc = LDAP_SASL_BIND_IN_PROGRESS,
1059                         NULL, NULL, NULL, NULL, &response );
1060
1061         } else {
1062                 send_ldap_result( conn, op, rc = slap_sasl_err2ldap( sc ),
1063                         NULL, errstr, NULL, NULL );
1064         }
1065
1066 #if SASL_VERSION_MAJOR < 2
1067         if( response.bv_len ) {
1068                 ch_free( response.bv_val );
1069         }
1070 #endif
1071
1072 #ifdef NEW_LOGGING
1073         LDAP_LOG(( "sasl", LDAP_LEVEL_ENTRY,
1074                 "slap_sasl_bind: rc=%d\n", rc ));
1075 #else
1076         Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rc, 0, 0);
1077 #endif
1078
1079
1080 #else
1081         send_ldap_result( conn, op, rc = LDAP_UNAVAILABLE,
1082                 NULL, "SASL not supported", NULL, NULL );
1083 #endif
1084
1085         return rc;
1086 }
1087
1088 char* slap_sasl_secprops( const char *in )
1089 {
1090 #ifdef HAVE_CYRUS_SASL
1091         int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
1092
1093         return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
1094 #else
1095         return "SASL not supported";
1096 #endif
1097 }