Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2009 Kungliga Tekniska Högskolan
       3             :  * (Royal Institute of Technology, Stockholm, Sweden).
       4             :  * All rights reserved.
       5             :  *
       6             :  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
       7             :  *
       8             :  * Redistribution and use in source and binary forms, with or without
       9             :  * modification, are permitted provided that the following conditions
      10             :  * are met:
      11             :  *
      12             :  * 1. Redistributions of source code must retain the above copyright
      13             :  *    notice, this list of conditions and the following disclaimer.
      14             :  *
      15             :  * 2. Redistributions in binary form must reproduce the above copyright
      16             :  *    notice, this list of conditions and the following disclaimer in the
      17             :  *    documentation and/or other materials provided with the distribution.
      18             :  *
      19             :  * 3. Neither the name of the Institute nor the names of its contributors
      20             :  *    may be used to endorse or promote products derived from this software
      21             :  *    without specific prior written permission.
      22             :  *
      23             :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      24             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      25             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      26             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      27             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      28             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      29             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      30             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      31             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      32             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      33             :  * SUCH DAMAGE.
      34             :  */
      35             : 
      36             : #include "hdb_locl.h"
      37             : #include <assert.h>
      38             : 
      39             : typedef struct {
      40             :     char *path;
      41             :     krb5_keytab keytab;
      42             : } *hdb_keytab;
      43             : 
      44             : /*
      45             :  *
      46             :  */
      47             : 
      48             : static krb5_error_code
      49           0 : hkt_close(krb5_context context, HDB *db)
      50             : {
      51           0 :     hdb_keytab k = (hdb_keytab)db->hdb_db;
      52           0 :     krb5_error_code ret;
      53             : 
      54           0 :     assert(k->keytab);
      55             : 
      56           0 :     ret = krb5_kt_close(context, k->keytab);
      57           0 :     k->keytab = NULL;
      58             : 
      59           0 :     return ret;
      60             : }
      61             : 
      62             : static krb5_error_code
      63           0 : hkt_destroy(krb5_context context, HDB *db)
      64             : {
      65           0 :     hdb_keytab k = (hdb_keytab)db->hdb_db;
      66           0 :     krb5_error_code ret;
      67             : 
      68           0 :     ret = hdb_clear_master_key(context, db);
      69           0 :     krb5_config_free_strings(db->virtual_hostbased_princ_svcs);
      70             : 
      71           0 :     free(k->path);
      72           0 :     free(k);
      73             : 
      74           0 :     free(db->hdb_name);
      75           0 :     free(db);
      76           0 :     return ret;
      77             : }
      78             : 
      79             : static krb5_error_code
      80           0 : hkt_lock(krb5_context context, HDB *db, int operation)
      81             : {
      82           0 :     return 0;
      83             : }
      84             : 
      85             : static krb5_error_code
      86           0 : hkt_unlock(krb5_context context, HDB *db)
      87             : {
      88           0 :     return 0;
      89             : }
      90             : 
      91             : static krb5_error_code
      92           0 : hkt_firstkey(krb5_context context, HDB *db,
      93             :              unsigned flags, hdb_entry *entry)
      94             : {
      95           0 :     return HDB_ERR_DB_INUSE;
      96             : }
      97             : 
      98             : static krb5_error_code
      99           0 : hkt_nextkey(krb5_context context, HDB * db, unsigned flags,
     100             :              hdb_entry * entry)
     101             : {
     102           0 :     return HDB_ERR_DB_INUSE;
     103             : }
     104             : 
     105             : static krb5_error_code
     106           0 : hkt_open(krb5_context context, HDB * db, int flags, mode_t mode)
     107             : {
     108           0 :     hdb_keytab k = (hdb_keytab)db->hdb_db;
     109           0 :     krb5_error_code ret;
     110             : 
     111           0 :     assert(k->keytab == NULL);
     112             : 
     113           0 :     ret = krb5_kt_resolve(context, k->path, &k->keytab);
     114           0 :     if (ret)
     115           0 :         return ret;
     116             : 
     117           0 :     return 0;
     118             : }
     119             : 
     120             : static krb5_error_code
     121           0 : hkt_fetch_kvno(krb5_context context, HDB * db, krb5_const_principal principal,
     122             :                unsigned flags, krb5_kvno kvno, hdb_entry * entry)
     123             : {
     124           0 :     hdb_keytab k = (hdb_keytab)db->hdb_db;
     125           0 :     krb5_error_code ret;
     126           0 :     krb5_keytab_entry ktentry;
     127             : 
     128           0 :     if (!(flags & HDB_F_KVNO_SPECIFIED)) {
     129             :             /* Preserve previous behaviour if no kvno specified */
     130           0 :             kvno = 0;
     131             :     }
     132             : 
     133           0 :     memset(&ktentry, 0, sizeof(ktentry));
     134             : 
     135           0 :     entry->flags.server = 1;
     136           0 :     entry->flags.forwardable = 1;
     137           0 :     entry->flags.renewable = 1;
     138             : 
     139             :     /* Not recorded in the OD backend, make something up */
     140           0 :     ret = krb5_parse_name(context, "hdb/keytab@WELL-KNOWN:KEYTAB-BACKEND",
     141           0 :                           &entry->created_by.principal);
     142           0 :     if (ret)
     143           0 :         goto out;
     144             : 
     145             :     /*
     146             :      * XXX really needs to try all enctypes and just not pick the
     147             :      * first one, even if that happens to be des3-cbc-sha1 (ie best
     148             :      * enctype) in the Apple case. A while loop over all known
     149             :      * enctypes should work.
     150             :      */
     151             : 
     152           0 :     ret = krb5_kt_get_entry(context, k->keytab, principal, kvno, 0, &ktentry);
     153           0 :     if (ret) {
     154           0 :         ret = HDB_ERR_NOENTRY;
     155           0 :         goto out;
     156             :     }
     157             : 
     158           0 :     ret = krb5_copy_principal(context, principal, &entry->principal);
     159           0 :     if (ret)
     160           0 :         goto out;
     161             : 
     162           0 :     ret = _hdb_keytab2hdb_entry(context, &ktentry, entry);
     163             : 
     164           0 :  out:
     165           0 :     if (ret) {
     166           0 :         free_HDB_entry(entry);
     167           0 :         memset(entry, 0, sizeof(*entry));
     168             :     }
     169           0 :     krb5_kt_free_entry(context, &ktentry);
     170             : 
     171           0 :     return ret;
     172             : }
     173             : 
     174             : static krb5_error_code
     175           0 : hkt_store(krb5_context context, HDB * db, unsigned flags,
     176             :           hdb_entry * entry)
     177             : {
     178           0 :     return HDB_ERR_DB_INUSE;
     179             : }
     180             : 
     181             : 
     182             : krb5_error_code
     183           0 : hdb_keytab_create(krb5_context context, HDB ** db, const char *arg)
     184             : {
     185           0 :     hdb_keytab k;
     186             : 
     187           0 :     *db = calloc(1, sizeof(**db));
     188           0 :     if (*db == NULL) {
     189           0 :         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
     190           0 :         return ENOMEM;
     191             :     }
     192           0 :     memset(*db, 0, sizeof(**db));
     193             : 
     194           0 :     k = calloc(1, sizeof(*k));
     195           0 :     if (k == NULL) {
     196           0 :         free(*db);
     197           0 :         *db = NULL;
     198           0 :         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
     199           0 :         return ENOMEM;
     200             :     }
     201             : 
     202           0 :     k->path = strdup(arg);
     203           0 :     if (k->path == NULL) {
     204           0 :         free(k);
     205           0 :         free(*db);
     206           0 :         *db = NULL;
     207           0 :         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
     208           0 :         return ENOMEM;
     209             :     }
     210             : 
     211             : 
     212           0 :     (*db)->hdb_db = k;
     213             : 
     214           0 :     (*db)->hdb_master_key_set = 0;
     215           0 :     (*db)->hdb_openp = 0;
     216           0 :     (*db)->hdb_open = hkt_open;
     217           0 :     (*db)->hdb_close = hkt_close;
     218           0 :     (*db)->hdb_fetch_kvno = hkt_fetch_kvno;
     219           0 :     (*db)->hdb_store = hkt_store;
     220           0 :     (*db)->hdb_remove = NULL;
     221           0 :     (*db)->hdb_firstkey = hkt_firstkey;
     222           0 :     (*db)->hdb_nextkey = hkt_nextkey;
     223           0 :     (*db)->hdb_lock = hkt_lock;
     224           0 :     (*db)->hdb_unlock = hkt_unlock;
     225           0 :     (*db)->hdb_rename = NULL;
     226           0 :     (*db)->hdb__get = NULL;
     227           0 :     (*db)->hdb__put = NULL;
     228           0 :     (*db)->hdb__del = NULL;
     229           0 :     (*db)->hdb_destroy = hkt_destroy;
     230             : 
     231           0 :     return 0;
     232             : }