source4/kdc/hdb-samba4.c

   1 /*
   2  * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
   3  * Copyright (c) 2004-2009, Andrew Bartlett <abartlet@samba.org>.
   4  * Copyright (c) 2004, Stefan Metzmacher <metze@samba.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * 3. Neither the name of PADL Software  nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "includes.h"
  36 #include "auth/auth.h"
  37 #include "auth/credentials/credentials.h"
  38 #include "dsdb/samdb/samdb.h"
  39 #include "param/param.h"
  40 #include "kdc/kdc-glue.h"
  41 #include "kdc/db-glue.h"
  42
  43 static krb5_error_code hdb_samba4_open(krb5_context context, HDB *db, int flags, mode_t mode)
  44 {
  45         if (db->hdb_master_key_set) {
  46                 krb5_error_code ret = HDB_ERR_NOENTRY;
  47                 krb5_warnx(context, "hdb_samba4_open: use of a master key incompatible with LDB\n");
  48                 krb5_set_error_message(context, ret, "hdb_samba4_open: use of a master key incompatible with LDB\n");
  49                 return ret;
  50         }
  51
  52         return 0;
  53 }
  54
  55 static krb5_error_code hdb_samba4_close(krb5_context context, HDB *db)
  56 {
  57         return 0;
  58 }
  59
  60 static krb5_error_code hdb_samba4_lock(krb5_context context, HDB *db, int operation)
  61 {
  62         return 0;
  63 }
  64
  65 static krb5_error_code hdb_samba4_unlock(krb5_context context, HDB *db)
  66 {
  67         return 0;
  68 }
  69
  70 static krb5_error_code hdb_samba4_rename(krb5_context context, HDB *db, const char *new_name)
  71 {
  72         return HDB_ERR_DB_INUSE;
  73 }
  74
  75 static krb5_error_code hdb_samba4_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
  76 {
  77         return HDB_ERR_DB_INUSE;
  78 }
  79
  80 static krb5_error_code hdb_samba4_remove(krb5_context context, HDB *db, krb5_const_principal principal)
  81 {
  82         return HDB_ERR_DB_INUSE;
  83 }
  84
  85 static krb5_error_code hdb_samba4_fetch_kvno(krb5_context context, HDB *db,
  86                                              krb5_const_principal principal,
  87                                              unsigned flags,
  88                                              krb5_kvno kvno,
  89                                              hdb_entry_ex *entry_ex)
  90 {
  91         struct samba_kdc_db_context *kdc_db_ctx;
  92
  93         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
  94                                            struct samba_kdc_db_context);
  95
  96         return samba_kdc_fetch(context, kdc_db_ctx, principal, flags, kvno, entry_ex);
  97 }
  98
  99 static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
 100                                         hdb_entry_ex *entry)
 101 {
 102         struct samba_kdc_db_context *kdc_db_ctx;
 103
 104         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 105                                            struct samba_kdc_db_context);
 106
 107         return samba_kdc_firstkey(context, kdc_db_ctx, entry);
 108 }
 109
 110 static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
 111                                    hdb_entry_ex *entry)
 112 {
 113         struct samba_kdc_db_context *kdc_db_ctx;
 114
 115         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 116                                            struct samba_kdc_db_context);
 117
 118         return samba_kdc_nextkey(context, kdc_db_ctx, entry);
 119 }
 120
 121 static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
 122 {
 123         talloc_free(db);
 124         return 0;
 125 }
 126
 127 static krb5_error_code
 128 hdb_samba4_check_identical_client_and_server(krb5_context context, HDB *db,
 129                                         hdb_entry_ex *entry,
 130                                         krb5_const_principal target_principal)
 131 {
 132         struct samba_kdc_db_context *kdc_db_ctx;
 133
 134         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 135                                            struct samba_kdc_db_context);
 136
 137         return samba_kdc_check_identical_client_and_server(context, kdc_db_ctx,
 138                                                            entry,
 139                                                            target_principal);
 140 }
 141
 142 static krb5_error_code
 143 hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
 144                                      hdb_entry_ex *entry,
 145                                      krb5_const_principal certificate_principal)
 146 {
 147         struct samba_kdc_db_context *kdc_db_ctx;
 148
 149         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 150                                            struct samba_kdc_db_context);
 151
 152         return samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
 153                                                    entry,
 154                                                    certificate_principal);
 155 }
 156
 157 /* This interface is to be called by the KDC and libnet_keytab_dump,
 158  * which is expecting Samba calling conventions.
 159  * It is also called by a wrapper (hdb_samba4_create) from the
 160  * kpasswdd -> krb5 -> keytab_hdb -> hdb code */
 161
 162 NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
 163                                krb5_context context, struct HDB **db)
 164 {
 165         struct samba_kdc_db_context *kdc_db_ctx;
 166         NTSTATUS nt_status;
 167
 168         *db = talloc(base_ctx, HDB);
 169         if (!*db) {
 170                 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 171                 return NT_STATUS_NO_MEMORY;
 172         }
 173
 174         (*db)->hdb_master_key_set = 0;
 175         (*db)->hdb_db = NULL;
 176         (*db)->hdb_capability_flags = 0;
 177
 178         nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
 179         if (!NT_STATUS_IS_OK(nt_status)) {
 180                 talloc_free(*db);
 181                 return nt_status;
 182         }
 183         (*db)->hdb_db = kdc_db_ctx;
 184
 185         (*db)->hdb_dbc = NULL;
 186         (*db)->hdb_open = hdb_samba4_open;
 187         (*db)->hdb_close = hdb_samba4_close;
 188         (*db)->hdb_fetch_kvno = hdb_samba4_fetch_kvno;
 189         (*db)->hdb_store = hdb_samba4_store;
 190         (*db)->hdb_remove = hdb_samba4_remove;
 191         (*db)->hdb_firstkey = hdb_samba4_firstkey;
 192         (*db)->hdb_nextkey = hdb_samba4_nextkey;
 193         (*db)->hdb_lock = hdb_samba4_lock;
 194         (*db)->hdb_unlock = hdb_samba4_unlock;
 195         (*db)->hdb_rename = hdb_samba4_rename;
 196         /* we don't implement these, as we are not a lockable database */
 197         (*db)->hdb__get = NULL;
 198         (*db)->hdb__put = NULL;
 199         /* kadmin should not be used for deletes - use other tools instead */
 200         (*db)->hdb__del = NULL;
 201         (*db)->hdb_destroy = hdb_samba4_destroy;
 202
 203         (*db)->hdb_auth_status = NULL;
 204         (*db)->hdb_check_constrained_delegation = hdb_samba4_check_identical_client_and_server;
 205         (*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
 206         (*db)->hdb_check_s4u2self = hdb_samba4_check_identical_client_and_server;
 207
 208         return NT_STATUS_OK;
 209 }
 210
 211 static krb5_error_code hdb_samba4_create(krb5_context context, struct HDB **db, const char *arg)
 212 {
 213         NTSTATUS nt_status;
 214         void *ptr;
 215         struct samba_kdc_base_context *base_ctx;
 216
 217         if (sscanf(arg, "&%p", &ptr) != 1) {
 218                 return EINVAL;
 219         }
 220         base_ctx = talloc_get_type_abort(ptr, struct samba_kdc_base_context);
 221         /* The global kdc_mem_ctx and kdc_lp_ctx, Disgusting, ugly hack, but it means one less private hook */
 222         nt_status = hdb_samba4_create_kdc(base_ctx, context, db);
 223
 224         if (NT_STATUS_IS_OK(nt_status)) {
 225                 return 0;
 226         }
 227         return EINVAL;
 228 }
 229
 230 /* Only used in the hdb-backed keytab code
 231  * for a keytab of 'samba4&<address>', to find
 232  * kpasswd's key in the main DB, and to
 233  * copy all the keys into a file (libnet_keytab_export)
 234  *
 235  * The <address> is the string form of a pointer to a talloced struct hdb_samba_context
 236  */
 237 struct hdb_method hdb_samba4 = {
 238         .interface_version = HDB_INTERFACE_VERSION,
 239         .prefix = "samba4",
 240         .create = hdb_samba4_create
 241 };