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