git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb2/bind.c

   1 /* bind.c - bdb2 backend bind and unbind routines */
   2 /* $OpenLDAP$ */
   3
   4 #include "portable.h"
   5
   6 #include <stdio.h>
   7
   8 #include <ac/krb.h>
   9 #include <ac/socket.h>
  10 #include <ac/string.h>
  11 #include <ac/unistd.h>
  12
  13 #include "slap.h"
  14 #include "back-bdb2.h"
  15 #include "proto-back-bdb2.h"
  16
  17 #include <lutil.h>
  18
  19 #ifdef HAVE_KERBEROS
  20 extern int      bdb2i_krbv4_ldap_auth();
  21 #endif
  22
  23 static int
  24 crypted_value_find(
  25         struct berval       **vals,
  26         struct berval       *v,
  27         int                 syntax,
  28         int                 normalize,
  29         struct berval           *cred
  30 )
  31 {
  32         int     i;
  33         for ( i = 0; vals[i] != NULL; i++ ) {
  34                 if ( syntax != SYNTAX_BIN ) {
  35                         int result;
  36
  37 #ifdef SLAPD_CRYPT
  38                         ldap_pvt_thread_mutex_lock( &crypt_mutex );
  39 #endif
  40
  41                         result = lutil_passwd(
  42                                 (char*) cred->bv_val,
  43                                 (char*) vals[i]->bv_val,
  44                                 NULL );
  45
  46 #ifdef SLAPD_CRYPT
  47                         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
  48 #endif
  49
  50                         return result;
  51
  52                 } else {
  53                 if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
  54                         return( 0 );
  55                 }
  56         }
  57         }
  58
  59         return( 1 );
  60 }
  61
  62 static int
  63 bdb2i_back_bind_internal(
  64     BackendDB           *be,
  65     Connection          *conn,
  66     Operation           *op,
  67     char                *dn,
  68     int                 method,
  69         char            *mech,
  70     struct berval       *cred,
  71         char**  edn
  72 )
  73 {
  74         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  75         Entry           *e;
  76         Attribute       *a;
  77         int             rc;
  78         Entry           *matched;
  79 #ifdef HAVE_KERBEROS
  80         char            krbname[MAX_K_NAME_SZ + 1];
  81         AUTH_DAT        ad;
  82 #endif
  83
  84         Debug(LDAP_DEBUG_ARGS, "==> bdb2_back_bind: dn: %s\n", dn, 0, 0);
  85
  86         *edn = NULL;
  87
  88         /* get entry with reader lock */
  89         if ( (e = bdb2i_dn2entry_r( be, dn, &matched )) == NULL ) {
  90                 char *matched_dn = NULL;
  91                 struct berval **refs = NULL;
  92
  93                 if ( matched != NULL ) {
  94                         matched_dn = ch_strdup( matched->e_dn );
  95                         refs = is_entry_referral( matched )
  96                                 ? get_entry_referrals( be, conn, op, matched )
  97                                 : NULL;
  98                         bdb2i_cache_return_entry_r( &li->li_cache, matched );
  99                 } else {
 100                         refs = default_referral;
 101                 }
 102
 103                 /* allow noauth binds */
 104                 rc = 1;
 105                 if ( method == LDAP_AUTH_SIMPLE ) {
 106                         if( cred->bv_len == 0 ) {
 107                                 /* SUCCESS */
 108                                 send_ldap_result( conn, op, LDAP_SUCCESS,
 109                                         NULL, NULL, NULL, NULL );
 110
 111                         } else if ( be_isroot_pw( be, dn, cred ) ) {
 112                                 /* front end will send result */
 113                                 *edn = ch_strdup( be_root_dn( be ) );
 114                                 rc = 0;
 115
 116                         } else if ( refs != NULL ) {
 117                                 send_ldap_result( conn, op, LDAP_REFERRAL,
 118                                         matched_dn, NULL, refs, NULL );
 119
 120                         } else {
 121                                 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 122                                         NULL, NULL, NULL, NULL );
 123                         }
 124
 125                 } else if ( method == LDAP_AUTH_SASL ) {
 126                         if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") == 0 ) {
 127                                 /* insert DIGEST calls here */
 128                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 129                                         NULL, NULL, NULL, NULL );
 130
 131                         } else {
 132                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 133                                         NULL, NULL, NULL, NULL );
 134                         }
 135
 136                 } else if ( refs != NULL ) {
 137                         send_ldap_result( conn, op, LDAP_REFERRAL,
 138                                 matched_dn, NULL, refs, NULL );
 139
 140                 } else {
 141                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 142                                 NULL, NULL, NULL, NULL );
 143                 }
 144
 145                 if ( matched != NULL ) {
 146                         ber_bvecfree( refs );
 147                         free( matched_dn );
 148                 }
 149                 return( rc );
 150         }
 151
 152         *edn = ch_strdup( e->e_dn );
 153
 154         /* check for deleted */
 155
 156         if ( ! access_allowed( be, conn, op, e,
 157                 "entry", NULL, ACL_AUTH ) )
 158         {
 159                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 160                         NULL, NULL, NULL, NULL );
 161                 rc = 1;
 162                 goto return_results;
 163         }
 164
 165         if ( is_entry_alias( e ) ) {
 166                 /* entry is a alias, don't allow bind */
 167                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 168                         0, 0 );
 169
 170                 send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
 171                         NULL, NULL, NULL, NULL );
 172
 173                 rc = 1;
 174                 goto return_results;
 175         }
 176
 177
 178         if ( is_entry_referral( e ) ) {
 179                 /* entry is a referral, don't allow bind */
 180                 struct berval **refs = get_entry_referrals( be,
 181                         conn, op, e );
 182
 183                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 184                         0, 0 );
 185
 186                 if( refs != NULL ) {
 187                         send_ldap_result( conn, op, LDAP_REFERRAL,
 188                                 e->e_dn, NULL, refs, NULL );
 189                 } else {
 190                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 191                                 NULL, NULL, NULL, NULL );
 192                 }
 193
 194                 ber_bvecfree( refs );
 195
 196                 rc = 1;
 197                 goto return_results;
 198         }
 199
 200         switch ( method ) {
 201         case LDAP_AUTH_SIMPLE:
 202                 if ( cred->bv_len == 0 ) {
 203                         send_ldap_result( conn, op, LDAP_SUCCESS,
 204                                 NULL, NULL, NULL, NULL );
 205
 206                         /* stop front end from sending result */
 207                         rc = 1;
 208                         goto return_results;
 209                 }
 210
 211                 /* check for root dn/passwd */
 212                 if ( be_isroot_pw( be, dn, cred ) ) {
 213                         /* front end will send result */
 214                         if( *edn != NULL ) free( *edn );
 215                         *edn = ch_strdup( be_root_dn( be ) );
 216                         rc = 0;
 217                         goto return_results;
 218                 }
 219
 220                 if ( ! access_allowed( be, conn, op, e,
 221                         "userpassword", NULL, ACL_AUTH ) )
 222                 {
 223                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 224                                 NULL, NULL, NULL, NULL);
 225                         rc = 1;
 226                         goto return_results;
 227                 }
 228
 229                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 230                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 231                                 NULL, NULL, NULL, NULL);
 232
 233                         /* stop front end from sending result */
 234                         rc = 1;
 235                         goto return_results;
 236                 }
 237
 238                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 239                 {
 240                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 241                                 NULL, NULL, NULL, NULL);
 242                         /* stop front end from sending result */
 243                         rc = 1;
 244                         goto return_results;
 245                 }
 246                 rc = 0;
 247                 break;
 248
 249 #ifdef HAVE_KERBEROS
 250         case LDAP_AUTH_KRBV41:
 251                 if ( bdb2i_krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 252                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 253                                 NULL, NULL, NULL, NULL);
 254                         rc = 1;
 255                         goto return_results;
 256                 }
 257
 258                 if ( ! access_allowed( be, conn, op, e,
 259                         "krbname", NULL, ACL_AUTH ) )
 260                 {
 261                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 262                                 NULL, NULL, NULL, NULL);
 263                         rc = 1;
 264                         goto return_results;
 265                 }
 266
 267                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 268                     : "", ad.pinst, ad.prealm );
 269
 270                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 271                         /*
 272                          * no krbName values present:  check against DN
 273                          */
 274                         if ( strcasecmp( dn, krbname ) == 0 ) {
 275                                 rc = 0; /* XXX wild ass guess */
 276                                 break;
 277                         }
 278                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 279                                 NULL, NULL, NULL, NULL);
 280                         rc = 1;
 281                         goto return_results;
 282                 } else {        /* look for krbName match */
 283                         struct berval   krbval;
 284
 285                         krbval.bv_val = krbname;
 286                         krbval.bv_len = strlen( krbname );
 287
 288                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 289                                 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 290                                         NULL, NULL, NULL, NULL);
 291                                 rc = 1;
 292                                 goto return_results;
 293                         }
 294                 }
 295                 rc = 0;
 296                 break;
 297
 298         case LDAP_AUTH_KRBV42:
 299                 send_ldap_result( conn, op, LDAP_SUCCESS,
 300                         NULL, NULL, NULL, NULL );
 301                 /* stop front end from sending result */
 302                 rc = 1;
 303                 goto return_results;
 304 #endif
 305
 306         case LDAP_AUTH_SASL:
 307                 /* insert sasl code here */
 308
 309         default:
 310                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 311                     NULL, "auth method not supported", NULL, NULL );
 312                 rc = 1;
 313                 goto return_results;
 314         }
 315
 316 return_results:;
 317         /* free entry and reader lock */
 318         bdb2i_cache_return_entry_r( &li->li_cache, e );
 319
 320         /* front end with send result on success (rc==0) */
 321         return( rc );
 322 }
 323
 324
 325 int
 326 bdb2_back_bind(
 327     BackendDB           *be,
 328     Connection          *conn,
 329     Operation           *op,
 330     char                *dn,
 331     char                *ndn,
 332     int                 method,
 333         char            *mech,
 334     struct berval       *cred,
 335         char**  edn
 336 )
 337 {
 338         DB_LOCK         lock;
 339         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
 340         struct timeval  time1;
 341         int             ret;
 342
 343         bdb2i_start_timing( be->bd_info, &time1 );
 344
 345         if ( bdb2i_enter_backend_r( &lock ) != 0 ) {
 346                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 347                         NULL, NULL, NULL, NULL );
 348                 return( 1 );
 349         }
 350
 351         ret = bdb2i_back_bind_internal( be, conn, op, ndn, method, mech, cred, edn );
 352
 353         (void) bdb2i_leave_backend_r( lock );
 354
 355         bdb2i_stop_timing( be->bd_info, time1, "BIND", conn, op );
 356
 357         return( ret );
 358 }
 359
 360