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 1998-1999 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 #include <lutil.h>
  22
  23 #ifdef HAVE_KERBEROS
  24 extern int      krbv4_ldap_auth();
  25 #endif
  26
  27 static int
  28 crypted_value_find(
  29         struct berval       **vals,
  30         struct berval       *v,
  31         int                 syntax,
  32         int                 normalize,
  33         struct berval           *cred
  34 )
  35 {
  36         int     i;
  37         for ( i = 0; vals[i] != NULL; i++ ) {
  38                 if ( syntax != SYNTAX_BIN ) {
  39                         int result;
  40
  41 #ifdef SLAPD_CRYPT
  42                         ldap_pvt_thread_mutex_lock( &crypt_mutex );
  43 #endif
  44
  45                         result = lutil_passwd(
  46                                 (char*) cred->bv_val,
  47                                 (char*) vals[i]->bv_val,
  48                                 NULL );
  49
  50 #ifdef SLAPD_CRYPT
  51                         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
  52 #endif
  53
  54                         return result;
  55
  56                 } else {
  57                 if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
  58                         return( 0 );
  59                 }
  60         }
  61         }
  62
  63         return( 1 );
  64 }
  65
  66 int
  67 ldbm_back_bind(
  68     Backend             *be,
  69     Connection          *conn,
  70     Operation           *op,
  71     char                *dn,
  72     char                *ndn,
  73     int                 method,
  74         char            *mech,
  75     struct berval       *cred,
  76         char**  edn
  77 )
  78 {
  79         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  80         Entry           *e;
  81         Attribute       *a;
  82         int             rc;
  83         Entry           *matched;
  84 #ifdef HAVE_KERBEROS
  85         char            krbname[MAX_K_NAME_SZ + 1];
  86         AUTH_DAT        ad;
  87 #endif
  88
  89         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
  90
  91         *edn = NULL;
  92         dn = ndn;
  93
  94         /* get entry with reader lock */
  95         if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
  96                 char *matched_dn = NULL;
  97                 struct berval **refs = NULL;
  98
  99                 if( matched != NULL ) {
 100                         matched_dn = ch_strdup( matched->e_dn );
 101
 102                         refs = is_entry_referral( matched )
 103                                 ? get_entry_referrals( be, conn, op, matched )
 104                                 : NULL;
 105
 106                         cache_return_entry_r( &li->li_cache, matched );
 107                 } else {
 108                         refs = default_referral;
 109                 }
 110
 111                 /* allow noauth binds */
 112                 rc = 1;
 113                 if ( method == LDAP_AUTH_SIMPLE ) {
 114                         if( cred->bv_len == 0 ) {
 115                                 /* SUCCESS */
 116                                 send_ldap_result( conn, op, LDAP_SUCCESS,
 117                                         NULL, NULL, NULL, NULL );
 118
 119                         } else if ( be_isroot_pw( be, dn, cred ) ) {
 120                                 *edn = ch_strdup( be_root_dn( be ) );
 121                                 rc = 0; /* front end will send result */
 122
 123                         } else {
 124                                 send_ldap_result( conn, op, LDAP_REFERRAL,
 125                                         matched_dn, NULL, refs, NULL );
 126                         }
 127
 128                 } else if ( method == LDAP_AUTH_SASL ) {
 129                         if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") == 0 ) {
 130                                 /* insert DIGEST calls here */
 131                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 132                                         NULL, NULL, NULL, NULL );
 133
 134                         } else {
 135                                 send_ldap_result( conn, op, LDAP_AUTH_METHOD_NOT_SUPPORTED,
 136                                         NULL, NULL, NULL, NULL );
 137                         }
 138
 139                 } else {
 140                         send_ldap_result( conn, op, LDAP_REFERRAL,
 141                                 matched_dn, NULL, refs, NULL );
 142                 }
 143
 144                 if ( matched != NULL ) {
 145                         ber_bvecfree( refs );
 146                         free( matched_dn );
 147                 }
 148                 return( rc );
 149         }
 150
 151         *edn = ch_strdup( e->e_dn );
 152
 153         /* check for deleted */
 154
 155         if ( ! access_allowed( be, conn, op, e,
 156                 "entry", NULL, ACL_AUTH ) )
 157         {
 158                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 159                         NULL, NULL, NULL, NULL );
 160                 rc = 1;
 161                 goto return_results;
 162         }
 163
 164         if ( is_entry_alias( e ) ) {
 165                 /* entry is an alias, don't allow bind */
 166                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 167                     0, 0 );
 168
 169                 send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
 170                     NULL, NULL, NULL, NULL );
 171
 172                 rc = 1;
 173                 goto return_results;
 174         }
 175
 176         if ( is_entry_referral( e ) ) {
 177                 /* entry is a referral, don't allow bind */
 178                 struct berval **refs = get_entry_referrals( be,
 179                         conn, op, e );
 180
 181                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 182                     0, 0 );
 183
 184                 send_ldap_result( conn, op, LDAP_REFERRAL,
 185                     e->e_dn, NULL, refs, NULL );
 186
 187                 ber_bvecfree( refs );
 188
 189                 rc = 1;
 190                 goto return_results;
 191         }
 192
 193         switch ( method ) {
 194         case LDAP_AUTH_SIMPLE:
 195                 if ( cred->bv_len == 0 ) {
 196                         send_ldap_result( conn, op, LDAP_SUCCESS,
 197                                 NULL, NULL, NULL, NULL );
 198
 199                         /* stop front end from sending result */
 200                         rc = 1;
 201                         goto return_results;
 202                 }
 203
 204                 /* check for root dn/passwd */
 205                 if ( be_isroot_pw( be, dn, cred ) ) {
 206                         /* front end will send result */
 207                         if(*edn != NULL) free( *edn );
 208                         *edn = ch_strdup( be_root_dn( be ) );
 209                         rc = 0;
 210                         goto return_results;
 211                 }
 212
 213                 if ( ! access_allowed( be, conn, op, e,
 214                         "userpassword", NULL, ACL_AUTH ) )
 215                 {
 216                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 217                                 NULL, NULL, NULL, NULL );
 218                         rc = 1;
 219                         goto return_results;
 220                 }
 221
 222                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 223                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 224                             NULL, NULL, NULL, NULL );
 225
 226                         /* stop front end from sending result */
 227                         rc = 1;
 228                         goto return_results;
 229                 }
 230
 231                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 232                 {
 233                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 234                                 NULL, NULL, NULL, NULL );
 235                         /* stop front end from sending result */
 236                         rc = 1;
 237                         goto return_results;
 238                 }
 239
 240                 rc = 0;
 241                 break;
 242
 243 #ifdef HAVE_KERBEROS
 244         case LDAP_AUTH_KRBV41:
 245                 if ( ! access_allowed( be, conn, op, e,
 246                         "krbname", NULL, ACL_AUTH ) )
 247                 {
 248                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 249                                 NULL, NULL, NULL, NULL );
 250                         rc = 1;
 251                         goto return_results;
 252                 }
 253
 254                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 255                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 256                             NULL, NULL, NULL, NULL );
 257                         rc = 1;
 258                         goto return_results;
 259                 }
 260
 261                 if ( ! access_allowed( be, conn, op, e,
 262                         "krbname", NULL, ACL_AUTH ) )
 263                 {
 264                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 265                                 NULL, NULL, NULL, NULL );
 266                         rc = 1;
 267                         goto return_results;
 268                 }
 269
 270                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 271                     : "", ad.pinst, ad.prealm );
 272
 273
 274                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 275                         /*
 276                          * no krbName values present:  check against DN
 277                          */
 278                         if ( strcasecmp( dn, krbname ) == 0 ) {
 279                                 rc = 0;
 280                                 break;
 281                         }
 282                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 283                             NULL, NULL, NULL, NULL );
 284                         rc = 1;
 285                         goto return_results;
 286
 287                 } else {        /* look for krbName match */
 288                         struct berval   krbval;
 289
 290                         krbval.bv_val = krbname;
 291                         krbval.bv_len = strlen( krbname );
 292
 293                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 294                                 send_ldap_result( conn, op,
 295                                     LDAP_INVALID_CREDENTIALS,
 296                                         NULL, NULL, NULL, NULL );
 297                                 rc = 1;
 298                                 goto return_results;
 299                         }
 300                 }
 301                 rc = 0;
 302                 break;
 303
 304         case LDAP_AUTH_KRBV42:
 305                 send_ldap_result( conn, op, LDAP_SUCCESS,
 306                         NULL, NULL, NULL, NULL );
 307                 /* stop front end from sending result */
 308                 rc = 1;
 309                 goto return_results;
 310 #endif
 311
 312         case LDAP_AUTH_SASL:
 313                 /* insert SASL code here */
 314
 315         default:
 316                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 317                     NULL, "auth method not supported", NULL, NULL );
 318                 rc = 1;
 319                 goto return_results;
 320         }
 321
 322 return_results:;
 323         /* free entry and reader lock */
 324         cache_return_entry_r( &li->li_cache, e );
 325
 326         /* front end with send result on success (rc==0) */
 327         return( rc );
 328 }
 329