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

   1 /* bind.c - ldbm backend bind and unbind routines */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6
   7 #include <ac/krb.h>
   8 #include <ac/socket.h>
   9 #include <ac/string.h>
  10 #include <ac/unistd.h>
  11
  12 #include "slap.h"
  13 #include "back-ldbm.h"
  14 #include "proto-back-ldbm.h"
  15
  16 #include <lutil.h>
  17
  18 #ifdef HAVE_KERBEROS
  19 extern int      krbv4_ldap_auth();
  20 #endif
  21
  22 static int
  23 crypted_value_find(
  24         struct berval       **vals,
  25         struct berval       *v,
  26         int                 syntax,
  27         int                 normalize,
  28         struct berval           *cred
  29 )
  30 {
  31         int     i;
  32         for ( i = 0; vals[i] != NULL; i++ ) {
  33                 if ( syntax != SYNTAX_BIN ) {
  34                         int result;
  35
  36 #ifdef SLAPD_CRYPT
  37                         ldap_pvt_thread_mutex_lock( &crypt_mutex );
  38 #endif
  39
  40                         result = lutil_passwd(
  41                                 (char*) cred->bv_val,
  42                                 (char*) vals[i]->bv_val,
  43                                 NULL );
  44
  45 #ifdef SLAPD_CRYPT
  46                         ldap_pvt_thread_mutex_unlock( &crypt_mutex );
  47 #endif
  48
  49                         return result;
  50
  51                 } else {
  52                 if ( value_cmp( vals[i], v, syntax, normalize ) == 0 ) {
  53                         return( 0 );
  54                 }
  55         }
  56         }
  57
  58         return( 1 );
  59 }
  60
  61 int
  62 ldbm_back_bind(
  63     Backend             *be,
  64     Connection          *conn,
  65     Operation           *op,
  66     char                *dn,
  67     int                 method,
  68         char            *mech,
  69     struct berval       *cred,
  70         char**  edn
  71 )
  72 {
  73         struct ldbminfo *li = (struct ldbminfo *) be->be_private;
  74         Entry           *e;
  75         Attribute       *a;
  76         int             rc;
  77         Entry           *matched;
  78 #ifdef HAVE_KERBEROS
  79         char            krbname[MAX_K_NAME_SZ + 1];
  80         AUTH_DAT        ad;
  81 #endif
  82
  83         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", dn, 0, 0);
  84
  85         *edn = NULL;
  86
  87         /* get entry with reader lock */
  88         if ( (e = dn2entry_r( be, dn, &matched )) == NULL ) {
  89                 char *matched_dn = NULL;
  90                 struct berval **refs = NULL;
  91
  92                 if( matched != NULL ) {
  93                         matched_dn = ch_strdup( matched->e_dn );
  94
  95                         refs = is_entry_referral( matched )
  96                                 ? get_entry_referrals( be, conn, op, matched )
  97                                 : NULL;
  98
  99                         cache_return_entry_r( &li->li_cache, matched );
 100                 } else {
 101                         refs = default_referral;
 102                 }
 103
 104                 /* allow noauth binds */
 105                 rc = 1;
 106                 if ( method == LDAP_AUTH_SIMPLE ) {
 107                         if( cred->bv_len == 0 ) {
 108                                 /* SUCCESS */
 109                                 send_ldap_result( conn, op, LDAP_SUCCESS,
 110                                         NULL, NULL, NULL, NULL );
 111
 112                         } else if ( be_isroot_pw( be, dn, cred ) ) {
 113                                 *edn = ch_strdup( be_root_dn( be ) );
 114                                 rc = 0; /* front end will send result */
 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                 }
 136
 137                 if ( matched != NULL ) {
 138                         ber_bvecfree( refs );
 139                         free( matched_dn );
 140                 }
 141                 return( rc );
 142         }
 143
 144         *edn = ch_strdup( e->e_dn );
 145
 146         /* check for deleted */
 147
 148         if ( ! access_allowed( be, conn, op, e,
 149                 "entry", NULL, ACL_AUTH ) )
 150         {
 151                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 152                         NULL, NULL, NULL, NULL );
 153                 rc = 1;
 154                 goto return_results;
 155         }
 156
 157         if ( is_entry_alias( e ) ) {
 158                 /* entry is an alias, don't allow bind */
 159                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 160                     0, 0 );
 161
 162                 send_ldap_result( conn, op, LDAP_ALIAS_PROBLEM,
 163                     NULL, NULL, NULL, NULL );
 164
 165                 rc = 1;
 166                 goto return_results;
 167         }
 168
 169         if ( is_entry_referral( e ) ) {
 170                 /* entry is a referral, don't allow bind */
 171                 struct berval **refs = get_entry_referrals( be,
 172                         conn, op, e );
 173
 174                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 175                     0, 0 );
 176
 177                 send_ldap_result( conn, op, LDAP_REFERRAL,
 178                     e->e_dn, NULL, refs, NULL );
 179
 180                 ber_bvecfree( refs );
 181
 182                 rc = 1;
 183                 goto return_results;
 184         }
 185
 186         switch ( method ) {
 187         case LDAP_AUTH_SIMPLE:
 188                 if ( cred->bv_len == 0 ) {
 189                         send_ldap_result( conn, op, LDAP_SUCCESS,
 190                                 NULL, NULL, NULL, NULL );
 191
 192                         /* stop front end from sending result */
 193                         rc = 1;
 194                         goto return_results;
 195                 }
 196
 197                 /* check for root dn/passwd */
 198                 if ( be_isroot_pw( be, dn, cred ) ) {
 199                         /* front end will send result */
 200                         if(*edn != NULL) free( *edn );
 201                         *edn = ch_strdup( be_root_dn( be ) );
 202                         rc = 0;
 203                         goto return_results;
 204                 }
 205
 206                 if ( ! access_allowed( be, conn, op, e,
 207                         "userpassword", NULL, ACL_AUTH ) )
 208                 {
 209                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 210                                 NULL, NULL, NULL, NULL );
 211                         rc = 1;
 212                         goto return_results;
 213                 }
 214
 215                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 216                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 217                             NULL, NULL, NULL, NULL );
 218
 219                         /* stop front end from sending result */
 220                         rc = 1;
 221                         goto return_results;
 222                 }
 223
 224                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 225                 {
 226                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 227                                 NULL, NULL, NULL, NULL );
 228                         /* stop front end from sending result */
 229                         rc = 1;
 230                         goto return_results;
 231                 }
 232
 233                 rc = 0;
 234                 break;
 235
 236 #ifdef HAVE_KERBEROS
 237         case LDAP_AUTH_KRBV41:
 238                 if ( ! access_allowed( be, conn, op, e,
 239                         "krbname", NULL, ACL_AUTH ) )
 240                 {
 241                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 242                                 NULL, NULL, NULL, NULL );
 243                         rc = 1;
 244                         goto return_results;
 245                 }
 246
 247                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 248                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 249                             NULL, NULL, NULL, NULL );
 250                         rc = 1;
 251                         goto return_results;
 252                 }
 253
 254                 if ( ! access_allowed( be, conn, op, e,
 255                         "krbname", NULL, ACL_AUTH ) )
 256                 {
 257                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS,
 258                                 NULL, NULL, NULL, NULL );
 259                         rc = 1;
 260                         goto return_results;
 261                 }
 262
 263                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 264                     : "", ad.pinst, ad.prealm );
 265
 266
 267                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 268                         /*
 269                          * no krbName values present:  check against DN
 270                          */
 271                         if ( strcasecmp( dn, krbname ) == 0 ) {
 272                                 rc = 0;
 273                                 break;
 274                         }
 275                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 276                             NULL, NULL, NULL, NULL );
 277                         rc = 1;
 278                         goto return_results;
 279
 280                 } else {        /* look for krbName match */
 281                         struct berval   krbval;
 282
 283                         krbval.bv_val = krbname;
 284                         krbval.bv_len = strlen( krbname );
 285
 286                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 287                                 send_ldap_result( conn, op,
 288                                     LDAP_INVALID_CREDENTIALS,
 289                                         NULL, NULL, NULL, NULL );
 290                                 rc = 1;
 291                                 goto return_results;
 292                         }
 293                 }
 294                 rc = 0;
 295                 break;
 296
 297         case LDAP_AUTH_KRBV42:
 298                 send_ldap_result( conn, op, LDAP_SUCCESS,
 299                         NULL, NULL, NULL, NULL );
 300                 /* stop front end from sending result */
 301                 rc = 1;
 302                 goto return_results;
 303 #endif
 304
 305         case LDAP_AUTH_SASL:
 306                 /* insert SASL code here */
 307
 308         default:
 309                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 310                     NULL, "auth method not supported", NULL, NULL );
 311                 rc = 1;
 312                 goto return_results;
 313         }
 314
 315 return_results:;
 316         /* free entry and reader lock */
 317         cache_return_entry_r( &li->li_cache, e );
 318
 319         /* front end with send result on success (rc==0) */
 320         return( rc );
 321 }
 322