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         char            *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                 /* allow noauth binds */
  90                 rc = 1;
  91                 if ( method == LDAP_AUTH_SIMPLE ) {
  92                         if( cred->bv_len == 0 ) {
  93                                 /* SUCCESS */
  94                                 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
  95
  96                         } else if ( be_isroot_pw( be, dn, cred ) ) {
  97                                 *edn = ch_strdup( be_root_dn( be ) );
  98                                 rc = 0; /* front end will send result */
  99
 100                         } else {
 101                                 send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT, matched, NULL );
 102                         }
 103
 104                 } else if ( method == LDAP_AUTH_SASL ) {
 105                         if( mech != NULL && strcasecmp(mech,"DIGEST-MD5") ) {
 106                                 /* insert DIGEST calls here */
 107                                 send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH, NULL, NULL );
 108
 109                         } else {
 110                                 send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH, NULL, NULL );
 111                         }
 112
 113                 } else {
 114                         send_ldap_result( conn, op, LDAP_NO_SUCH_OBJECT, matched, NULL );
 115                 }
 116
 117                 if ( matched != NULL ) {
 118                         free( matched );
 119                 }
 120                 return( rc );
 121         }
 122
 123         *edn = ch_strdup( e->e_dn );
 124
 125         /* check for deleted */
 126
 127 #ifdef SLAPD_ACLAUTH
 128         if ( ! access_allowed( be, conn, op, e,
 129                 "entry", NULL, ACL_AUTH ) )
 130         {
 131                 send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
 132                 rc = 1;
 133                 goto return_results;
 134         }
 135 #endif
 136
 137         switch ( method ) {
 138         case LDAP_AUTH_SIMPLE:
 139                 if ( cred->bv_len == 0 ) {
 140                         send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 141
 142                         /* stop front end from sending result */
 143                         rc = 1;
 144                         goto return_results;
 145                 }
 146
 147                 /* check for root dn/passwd */
 148                 if ( be_isroot_pw( be, dn, cred ) ) {
 149                         /* front end will send result */
 150                         if(*edn != NULL) free( *edn );
 151                         *edn = ch_strdup( be_root_dn( be ) );
 152                         rc = 0;
 153                         goto return_results;
 154                 }
 155
 156 #ifdef SLAPD_ACLAUTH
 157                 if ( ! access_allowed( be, conn, op, e,
 158                         "userpassword", NULL, ACL_AUTH ) )
 159                 {
 160                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
 161                         rc = 1;
 162                         goto return_results;
 163                 }
 164 #endif
 165
 166                 if ( (a = attr_find( e->e_attrs, "userpassword" )) == NULL ) {
 167                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 168                             NULL, NULL );
 169
 170                         /* stop front end from sending result */
 171                         rc = 1;
 172                         goto return_results;
 173                 }
 174
 175                 if ( crypted_value_find( a->a_vals, cred, a->a_syntax, 0, cred ) != 0 )
 176                 {
 177                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 178                                 NULL, NULL );
 179                         /* stop front end from sending result */
 180                         rc = 1;
 181                         goto return_results;
 182                 }
 183
 184                 rc = 0;
 185                 break;
 186
 187 #ifdef HAVE_KERBEROS
 188         case LDAP_AUTH_KRBV41:
 189 #ifdef SLAPD_ACLAUTH
 190                 if ( ! access_allowed( be, conn, op, e,
 191                         "krbname", NULL, ACL_AUTH ) )
 192                 {
 193                         send_ldap_result( conn, op, LDAP_INSUFFICIENT_ACCESS, "", "" );
 194                         rc = 1;
 195                         goto return_results;
 196                 }
 197 #endif
 198                 if ( krbv4_ldap_auth( be, cred, &ad ) != LDAP_SUCCESS ) {
 199                         send_ldap_result( conn, op, LDAP_INVALID_CREDENTIALS,
 200                             NULL, NULL );
 201                         rc = 0;
 202                         goto return_results;
 203                 }
 204                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 205                     : "", ad.pinst, ad.prealm );
 206                 if ( (a = attr_find( e->e_attrs, "krbname" )) == NULL ) {
 207                         /*
 208                          * no krbName values present:  check against DN
 209                          */
 210                         if ( strcasecmp( dn, krbname ) == 0 ) {
 211                                 rc = 0;
 212                                 break;
 213                         }
 214                         send_ldap_result( conn, op, LDAP_INAPPROPRIATE_AUTH,
 215                             NULL, NULL );
 216                         rc = 1;
 217                         goto return_results;
 218
 219                 } else {        /* look for krbName match */
 220                         struct berval   krbval;
 221
 222                         krbval.bv_val = krbname;
 223                         krbval.bv_len = strlen( krbname );
 224
 225                         if ( value_find( a->a_vals, &krbval, a->a_syntax, 3 ) != 0 ) {
 226                                 send_ldap_result( conn, op,
 227                                     LDAP_INVALID_CREDENTIALS, NULL, NULL );
 228                                 rc = 1;
 229                                 goto return_results;
 230                         }
 231                 }
 232                 rc = 0;
 233                 break;
 234
 235         case LDAP_AUTH_KRBV42:
 236                 send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
 237                 /* stop front end from sending result */
 238                 rc = 1;
 239                 goto return_results;
 240 #endif
 241
 242         default:
 243                 send_ldap_result( conn, op, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 244                     NULL, "auth method not supported" );
 245                 rc = 1;
 246                 goto return_results;
 247         }
 248
 249 return_results:;
 250         /* free entry and reader lock */
 251         cache_return_entry_r( &li->li_cache, e );
 252
 253         /* front end with send result on success (rc==0) */
 254         return( rc );
 255 }
 256