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 "kdc/kdc-glue.h"
  37 #include "kdc/db-glue.h"
  38 #include "auth/auth_sam.h"
  39 #include <ldb.h>
  40
  41 static krb5_error_code hdb_samba4_open(krb5_context context, HDB *db, int flags, mode_t mode)
  42 {
  43         if (db->hdb_master_key_set) {
  44                 krb5_error_code ret = HDB_ERR_NOENTRY;
  45                 krb5_warnx(context, "hdb_samba4_open: use of a master key incompatible with LDB\n");
  46                 krb5_set_error_message(context, ret, "hdb_samba4_open: use of a master key incompatible with LDB\n");
  47                 return ret;
  48         }
  49
  50         return 0;
  51 }
  52
  53 static krb5_error_code hdb_samba4_close(krb5_context context, HDB *db)
  54 {
  55         return 0;
  56 }
  57
  58 static krb5_error_code hdb_samba4_lock(krb5_context context, HDB *db, int operation)
  59 {
  60         return 0;
  61 }
  62
  63 static krb5_error_code hdb_samba4_unlock(krb5_context context, HDB *db)
  64 {
  65         return 0;
  66 }
  67
  68 static krb5_error_code hdb_samba4_rename(krb5_context context, HDB *db, const char *new_name)
  69 {
  70         return HDB_ERR_DB_INUSE;
  71 }
  72
  73 static krb5_error_code hdb_samba4_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
  74 {
  75         return HDB_ERR_DB_INUSE;
  76 }
  77
  78 static krb5_error_code hdb_samba4_remove(krb5_context context, HDB *db, krb5_const_principal principal)
  79 {
  80         return HDB_ERR_DB_INUSE;
  81 }
  82
  83 static krb5_error_code hdb_samba4_fetch_kvno(krb5_context context, HDB *db,
  84                                              krb5_const_principal principal,
  85                                              unsigned flags,
  86                                              krb5_kvno kvno,
  87                                              hdb_entry_ex *entry_ex)
  88 {
  89         struct samba_kdc_db_context *kdc_db_ctx;
  90
  91         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
  92                                            struct samba_kdc_db_context);
  93
  94         return samba_kdc_fetch(context, kdc_db_ctx, principal, flags, kvno, entry_ex);
  95 }
  96
  97 static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
  98                                         hdb_entry_ex *entry)
  99 {
 100         struct samba_kdc_db_context *kdc_db_ctx;
 101
 102         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 103                                            struct samba_kdc_db_context);
 104
 105         return samba_kdc_firstkey(context, kdc_db_ctx, entry);
 106 }
 107
 108 static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
 109                                    hdb_entry_ex *entry)
 110 {
 111         struct samba_kdc_db_context *kdc_db_ctx;
 112
 113         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 114                                            struct samba_kdc_db_context);
 115
 116         return samba_kdc_nextkey(context, kdc_db_ctx, entry);
 117 }
 118
 119 static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
 120 {
 121         talloc_free(db);
 122         return 0;
 123 }
 124
 125 static krb5_error_code
 126 hdb_samba4_check_constrained_delegation(krb5_context context, HDB *db,
 127                                         hdb_entry_ex *entry,
 128                                         krb5_const_principal target_principal)
 129 {
 130         struct samba_kdc_db_context *kdc_db_ctx;
 131         struct samba_kdc_entry *skdc_entry;
 132
 133         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 134                                            struct samba_kdc_db_context);
 135         skdc_entry = talloc_get_type_abort(entry->ctx,
 136                                            struct samba_kdc_entry);
 137
 138         return samba_kdc_check_s4u2proxy(context, kdc_db_ctx,
 139                                          skdc_entry,
 140                                          target_principal);
 141 }
 142
 143 static krb5_error_code
 144 hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
 145                                      hdb_entry_ex *entry,
 146                                      krb5_const_principal certificate_principal)
 147 {
 148         struct samba_kdc_db_context *kdc_db_ctx;
 149         struct samba_kdc_entry *skdc_entry;
 150
 151         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 152                                            struct samba_kdc_db_context);
 153         skdc_entry = talloc_get_type_abort(entry->ctx,
 154                                            struct samba_kdc_entry);
 155
 156         return samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
 157                                                    skdc_entry,
 158                                                    certificate_principal);
 159 }
 160
 161 static krb5_error_code
 162 hdb_samba4_check_s4u2self(krb5_context context, HDB *db,
 163                           hdb_entry_ex *entry,
 164                           krb5_const_principal target_principal)
 165 {
 166         struct samba_kdc_db_context *kdc_db_ctx;
 167         struct samba_kdc_entry *skdc_entry;
 168
 169         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 170                                            struct samba_kdc_db_context);
 171         skdc_entry = talloc_get_type_abort(entry->ctx,
 172                                            struct samba_kdc_entry);
 173
 174         return samba_kdc_check_s4u2self(context, kdc_db_ctx,
 175                                         skdc_entry,
 176                                         target_principal);
 177 }
 178
 179 static krb5_error_code hdb_samba4_auth_status(krb5_context context, HDB *db,
 180                                               hdb_entry_ex *entry,
 181                                               int hdb_auth_status)
 182 {
 183         struct samba_kdc_db_context *kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 184                                                                         struct samba_kdc_db_context);
 185         struct samba_kdc_entry *p = talloc_get_type(entry->ctx, struct samba_kdc_entry);
 186
 187         if (hdb_auth_status == HDB_AUTH_WRONG_PASSWORD) {
 188                 authsam_update_bad_pwd_count(kdc_db_ctx->samdb, p->msg, ldb_get_default_basedn(kdc_db_ctx->samdb));
 189         } else if (hdb_auth_status == HDB_AUTH_SUCCESS) {
 190                 authsam_zero_bad_pwd_count(kdc_db_ctx->samdb, p->msg);
 191         }
 192         return 0;
 193 }
 194
 195 /* This interface is to be called by the KDC and libnet_keytab_dump,
 196  * which is expecting Samba calling conventions.
 197  * It is also called by a wrapper (hdb_samba4_create) from the
 198  * kpasswdd -> krb5 -> keytab_hdb -> hdb code */
 199
 200 NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
 201                                krb5_context context, struct HDB **db)
 202 {
 203         struct samba_kdc_db_context *kdc_db_ctx;
 204         NTSTATUS nt_status;
 205
 206         if (hdb_interface_version != HDB_INTERFACE_VERSION) {
 207                 krb5_set_error_message(context, EINVAL, "Heimdal HDB interface version mismatch between build-time and run-time libraries!");
 208                 return NT_STATUS_ERROR_DS_INCOMPATIBLE_VERSION;
 209         }
 210
 211         *db = talloc(base_ctx, HDB);
 212         if (!*db) {
 213                 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 214                 return NT_STATUS_NO_MEMORY;
 215         }
 216
 217         (*db)->hdb_master_key_set = 0;
 218         (*db)->hdb_db = NULL;
 219         (*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
 220
 221         nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
 222         if (!NT_STATUS_IS_OK(nt_status)) {
 223                 talloc_free(*db);
 224                 return nt_status;
 225         }
 226         (*db)->hdb_db = kdc_db_ctx;
 227
 228         (*db)->hdb_dbc = NULL;
 229         (*db)->hdb_open = hdb_samba4_open;
 230         (*db)->hdb_close = hdb_samba4_close;
 231         (*db)->hdb_fetch_kvno = hdb_samba4_fetch_kvno;
 232         (*db)->hdb_store = hdb_samba4_store;
 233         (*db)->hdb_remove = hdb_samba4_remove;
 234         (*db)->hdb_firstkey = hdb_samba4_firstkey;
 235         (*db)->hdb_nextkey = hdb_samba4_nextkey;
 236         (*db)->hdb_lock = hdb_samba4_lock;
 237         (*db)->hdb_unlock = hdb_samba4_unlock;
 238         (*db)->hdb_rename = hdb_samba4_rename;
 239         /* we don't implement these, as we are not a lockable database */
 240         (*db)->hdb__get = NULL;
 241         (*db)->hdb__put = NULL;
 242         /* kadmin should not be used for deletes - use other tools instead */
 243         (*db)->hdb__del = NULL;
 244         (*db)->hdb_destroy = hdb_samba4_destroy;
 245
 246         (*db)->hdb_auth_status = hdb_samba4_auth_status;
 247         (*db)->hdb_check_constrained_delegation = hdb_samba4_check_constrained_delegation;
 248         (*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
 249         (*db)->hdb_check_s4u2self = hdb_samba4_check_s4u2self;
 250
 251         return NT_STATUS_OK;
 252 }