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 {
 117                                 send_ldap_result( conn, op, LDAP_REFERRAL,
 118                                         matched_dn, NULL, refs, NULL );
 119                         }
 120
 121                 } else if ( method == LDAP_AUTH_SASL ) {
 122                         if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") == 0 ) {
 123                                 /* insert DIGEST calls here */
 124                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 125                                         NULL, NULL, NULL, NULL );
 126
 127                         } else {
 128                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 129                                         NULL, NULL, NULL, NULL );
 130                         }
 131
 132                 } else {
 133                         send_ldap_result( conn, op, LDAP_REFERRAL,
 134                                 matched_dn, NULL, refs, NULL );
 135                         rc = 1;
 136                 }
 137
 138                 if ( matched != NULL ) {
 139                         ber_bvecfree( refs );
 140                         free( matched_dn );
 141                 }
 142                 return( rc );
 143         }
 144
 145         *edn = ch_strdup( e->e_dn );
 146
 147         /* check for deleted */
 148
 149         if ( ! access_allowed( be, conn, op, e,
 150                 "entry", NULL, ACL_AUTH ) )
 151         {
 152                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 153                         NULL, NULL, NULL, NULL );
 154                 rc = 1;
 155                 goto return_results;
 156         }
 157
 158         if ( is_entry_alias( e ) ) {
 159                 /* entry is a alias, don't allow bind */
 160                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 161                         0, 0 );
 162
 163                 send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
 164                         NULL, NULL, NULL, NULL );
 165
 166                 rc = 1;
 167                 goto return_results;
 168         }
 169
 170
 171         if ( is_entry_referral( e ) ) {
 172                 /* entry is a referral, don't allow bind */
 173                 struct berval **refs = get_entry_referrals( be,
 174                         conn, op, e );
 175
 176                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 177                         0, 0 );
 178
 179                 send_ldap_result( conn, op, LDAP_REFERRAL,
 180                         e->e_dn, NULL, refs, NULL );
 181
 182                 ber_bvecfree( refs );
 183
 184                 rc = 1;
 185                 goto return_results;
 186         }
 187
 188         switch ( method ) {
 189         case LDAP_AUTH_SIMPLE:
 190                 if ( cred->bv_len == 0 ) {
 191                         send_ldap_result( conn, op, LDAP_SUCCESS,
 192                                 NULL, NULL, NULL, NULL );
 193
 194                         /* stop front end from sending result */
 195                         rc = 1;
 196                         goto return_results;
 197                 }
 198
 199                 /* check for root dn/passwd */
 200                 if ( be_isroot_pw( be, dn, cred ) ) {
 201                         /* front end will send result */
 202                         if( *edn != NULL ) free( *edn );
 203                         *edn = ch_strdup( be_root_dn( be ) );
 204                         rc = 0;
 205                         goto return_results;
 206                 }
 207
 208                 if ( ! access_allowed( be, conn, op, e,
 209                         "userpassword", NULL, ACL_AUTH ) )
 210                 {
 211                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 212                                 NULL, NULL, NULL, NULL);
 213                         rc = 1;
 214                         goto return_results;
 215                 }
 216
 217                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 218                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 219                                 NULL, NULL, NULL, NULL);
 220
 221                         /* stop front end from sending result */
 222                         rc = 1;
 223                         goto return_results;
 224                 }
 225
 226                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 227                 {
 228                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 229                                 NULL, NULL, NULL, NULL);
 230                         /* stop front end from sending result */
 231                         rc = 1;
 232                         goto return_results;
 233                 }
 234                 rc = 0;
 235                 break;
 236
 237 #ifdef HAVE_KERBEROS
 238         case LDAP_AUTH_KRBV41:
 239                 if ( bdb2i_krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 240                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 241                                 NULL, NULL, NULL, NULL);
 242                         rc = 1;
 243                         goto return_results;
 244                 }
 245
 246                 if ( ! access_allowed( be, conn, op, e,
 247                         "krbname", NULL, ACL_AUTH ) )
 248                 {
 249                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 250                                 NULL, NULL, NULL, NULL);
 251                         rc = 1;
 252                         goto return_results;
 253                 }
 254
 255                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 256                     : "", ad.pinst, ad.prealm );
 257
 258                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 259                         /*
 260                          * no krbName values present:  check against DN
 261                          */
 262                         if ( strcasecmp( dn, krbname ) == 0 ) {
 263                                 rc = 0; /* XXX wild ass guess */
 264                                 break;
 265                         }
 266                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 267                                 NULL, NULL, NULL, NULL);
 268                         rc = 1;
 269                         goto return_results;
 270                 } else {        /* look for krbName match */
 271                         struct berval   krbval;
 272
 273                         krbval.bv_val = krbname;
 274                         krbval.bv_len = strlen( krbname );
 275
 276                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 277                                 send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 278                                         NULL, NULL, NULL, NULL);
 279                                 rc = 1;
 280                                 goto return_results;
 281                         }
 282                 }
 283                 rc = 0;
 284                 break;
 285
 286         case LDAP_AUTH_KRBV42:
 287                 send_ldap_result( conn, op, LDAP_SUCCESS,
 288                         NULL, NULL, NULL, NULL );
 289                 /* stop front end from sending result */
 290                 rc = 1;
 291                 goto return_results;
 292 #endif
 293
 294         case LDAP_AUTH_SASL:
 295                 /* insert sasl code here */
 296
 297         default:
 298                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 299                     NULL, "auth method not supported", NULL, NULL );
 300                 rc = 1;
 301                 goto return_results;
 302         }
 303
 304 return_results:;
 305         /* free entry and reader lock */
 306         bdb2i_cache_return_entry_r( &li->li_cache, e );
 307
 308         /* front end with send result on success (rc==0) */
 309         return( rc );
 310 }
 311
 312
 313 int
 314 bdb2_back_bind(
 315     BackendDB           *be,
 316     Connection          *conn,
 317     Operation           *op,
 318     char                *dn,
 319     int                 method,
 320         char            *mech,
 321     struct berval       *cred,
 322         char**  edn
 323 )
 324 {
 325         DB_LOCK         lock;
 326         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
 327         struct timeval  time1;
 328         int             ret;
 329
 330         bdb2i_start_timing( be->bd_info, &time1 );
 331
 332         if ( bdb2i_enter_backend_r( &lock ) != 0 ) {
 333                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 334                         NULL, NULL, NULL, NULL );
 335                 return( 1 );
 336         }
 337
 338         ret = bdb2i_back_bind_internal( be, conn, op, dn, method, mech, cred, edn );
 339
 340         (void) bdb2i_leave_backend_r( lock );
 341
 342         bdb2i_stop_timing( be->bd_info, time1, "BIND", conn, op );
 343
 344         return( ret );
 345 }
 346
 347