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

   1 /* bind.c - ldbm backend bind and unbind routines */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/krb.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15 #include <ac/unistd.h>
  16
  17 #include "slap.h"
  18 #include "back-ldbm.h"
  19 #include "proto-back-ldbm.h"
  20
  21 int
  22 ldbm_back_bind(
  23     Operation           *op,
  24     SlapReply           *rs )
  25 {
  26         struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
  27         Entry           *e;
  28         Attribute       *a;
  29         int             rc;
  30         Entry           *matched;
  31 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  32         char            krbname[MAX_K_NAME_SZ + 1];
  33         AttributeDescription *krbattr = slap_schema.si_ad_krbName;
  34         AUTH_DAT        ad;
  35 #endif
  36
  37         AttributeDescription *password = slap_schema.si_ad_userPassword;
  38
  39 #ifdef NEW_LOGGING
  40         LDAP_LOG( BACK_LDBM, ENTRY,
  41                 "ldbm_back_bind: dn: %s.\n", op->o_req_dn.bv_val, 0, 0 );
  42 #else
  43         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  44 #endif
  45
  46         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  47                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  48                 /* front end will send result */
  49                 return LDAP_SUCCESS;
  50         }
  51
  52         /* grab giant lock for reading */
  53         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  54
  55         /* get entry with reader lock */
  56         if ( (e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched )) == NULL ) {
  57                 if( matched != NULL ) {
  58                         rs->sr_matched = ch_strdup( matched->e_dn );
  59
  60                         rs->sr_ref = is_entry_referral( matched )
  61                                 ? get_entry_referrals( op, matched )
  62                                 : NULL;
  63
  64                         cache_return_entry_r( &li->li_cache, matched );
  65
  66                 } else {
  67                         rs->sr_ref = referral_rewrite( default_referral,
  68                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  69                 }
  70
  71                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  72
  73                 /* allow noauth binds */
  74                 rc = 1;
  75                 if ( rs->sr_ref != NULL ) {
  76                         rs->sr_err = LDAP_REFERRAL;
  77                 } else {
  78                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  79                 }
  80                 send_ldap_result( op, rs );
  81
  82                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  83                 if ( rs->sr_matched ) free( (char *)rs->sr_matched );
  84                 return( rc );
  85         }
  86
  87         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
  88
  89         /* check for deleted */
  90
  91         if ( is_entry_alias( e ) ) {
  92                 /* entry is an alias, don't allow bind */
  93 #ifdef NEW_LOGGING
  94                 LDAP_LOG( BACK_LDBM, INFO,
  95                         "ldbm_back_bind: entry (%s) is an alias.\n", e->e_name.bv_val, 0, 0 );
  96 #else
  97                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
  98                     0, 0 );
  99 #endif
 100
 101
 102                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 103                     "entry is alias" );
 104
 105                 rc = 1;
 106                 goto return_results;
 107         }
 108
 109         if ( is_entry_referral( e ) ) {
 110                 /* entry is a referral, don't allow bind */
 111                 rs->sr_ref = get_entry_referrals( op, e );
 112
 113 #ifdef NEW_LOGGING
 114                 LDAP_LOG( BACK_LDBM, INFO,
 115                            "ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
 116 #else
 117                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 118                     0, 0 );
 119 #endif
 120
 121
 122                 if( rs->sr_ref != NULL ) {
 123                         rs->sr_err = LDAP_REFERRAL;
 124                         rs->sr_matched = e->e_name.bv_val;
 125
 126                 } else {
 127                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 128                 }
 129                 send_ldap_result( op, rs );
 130
 131                 ber_bvarray_free( rs->sr_ref );
 132
 133                 rc = 1;
 134                 goto return_results;
 135         }
 136
 137         switch ( op->oq_bind.rb_method ) {
 138         case LDAP_AUTH_SIMPLE:
 139                 if ( ! access_allowed( op, e,
 140                         password, NULL, ACL_AUTH, NULL ) )
 141                 {
 142                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 143                         rc = 1;
 144                         goto return_results;
 145                 }
 146
 147                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 148                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 149
 150                         /* stop front end from sending result */
 151                         rc = 1;
 152                         goto return_results;
 153                 }
 154
 155                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred ) != 0 ) {
 156                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 157                         /* stop front end from sending result */
 158                         rc = 1;
 159                         goto return_results;
 160                 }
 161
 162                 rc = 0;
 163                 break;
 164
 165 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 166         case LDAP_AUTH_KRBV41:
 167                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 168                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 169                         rc = 1;
 170                         goto return_results;
 171                 }
 172
 173                 if ( ! access_allowed( op, e,
 174                         krbattr, NULL, ACL_AUTH, NULL ) )
 175                 {
 176                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 177                                 NULL );
 178                         rc = 1;
 179                         goto return_results;
 180                 }
 181
 182                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 183                     : "", ad.pinst, ad.prealm );
 184
 185                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 186                         /*
 187                          * no krbname values present:  check against DN
 188                          */
 189                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 190                                 rc = 0;
 191                                 break;
 192                         }
 193                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 194                         rc = 1;
 195                         goto return_results;
 196
 197                 } else {        /* look for krbname match */
 198                         struct berval   krbval;
 199
 200                         krbval.bv_val = krbname;
 201                         krbval.bv_len = strlen( krbname );
 202
 203                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 204                                 send_ldap_error( op, rs,
 205                                     LDAP_INVALID_CREDENTIALS, NULL );
 206                                 rc = 1;
 207                                 goto return_results;
 208                         }
 209                 }
 210                 rc = 0;
 211                 break;
 212
 213         case LDAP_AUTH_KRBV42:
 214                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 215                         "Kerberos bind step 2 not supported" );
 216                 /* stop front end from sending result */
 217                 rc = LDAP_UNWILLING_TO_PERFORM;
 218                 goto return_results;
 219 #endif
 220
 221         default:
 222                 send_ldap_error( op, rs, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 223                     "authentication method not supported" );
 224                 rc = 1;
 225                 goto return_results;
 226         }
 227
 228 return_results:;
 229         /* free entry and reader lock */
 230         cache_return_entry_r( &li->li_cache, e );
 231         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 232
 233         /* front end will send result on success (rc==0) */
 234         return( rc );
 235 }
 236