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
  39 static krb5_error_code hdb_samba4_open(krb5_context context, HDB *db, int flags, mode_t mode)
  40 {
  41         if (db->hdb_master_key_set) {
  42                 krb5_error_code ret = HDB_ERR_NOENTRY;
  43                 krb5_warnx(context, "hdb_samba4_open: use of a master key incompatible with LDB\n");
  44                 krb5_set_error_message(context, ret, "hdb_samba4_open: use of a master key incompatible with LDB\n");
  45                 return ret;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static krb5_error_code hdb_samba4_close(krb5_context context, HDB *db)
  52 {
  53         return 0;
  54 }
  55
  56 static krb5_error_code hdb_samba4_lock(krb5_context context, HDB *db, int operation)
  57 {
  58         return 0;
  59 }
  60
  61 static krb5_error_code hdb_samba4_unlock(krb5_context context, HDB *db)
  62 {
  63         return 0;
  64 }
  65
  66 static krb5_error_code hdb_samba4_rename(krb5_context context, HDB *db, const char *new_name)
  67 {
  68         return HDB_ERR_DB_INUSE;
  69 }
  70
  71 static krb5_error_code hdb_samba4_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
  72 {
  73         return HDB_ERR_DB_INUSE;
  74 }
  75
  76 static krb5_error_code hdb_samba4_remove(krb5_context context, HDB *db, krb5_const_principal principal)
  77 {
  78         return HDB_ERR_DB_INUSE;
  79 }
  80
  81 static krb5_error_code hdb_samba4_fetch_kvno(krb5_context context, HDB *db,
  82                                              krb5_const_principal principal,
  83                                              unsigned flags,
  84                                              krb5_kvno kvno,
  85                                              hdb_entry_ex *entry_ex)
  86 {
  87         struct samba_kdc_db_context *kdc_db_ctx;
  88
  89         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
  90                                            struct samba_kdc_db_context);
  91
  92         return samba_kdc_fetch(context, kdc_db_ctx, principal, flags, kvno, entry_ex);
  93 }
  94
  95 static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
  96                                         hdb_entry_ex *entry)
  97 {
  98         struct samba_kdc_db_context *kdc_db_ctx;
  99
 100         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 101                                            struct samba_kdc_db_context);
 102
 103         return samba_kdc_firstkey(context, kdc_db_ctx, entry);
 104 }
 105
 106 static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
 107                                    hdb_entry_ex *entry)
 108 {
 109         struct samba_kdc_db_context *kdc_db_ctx;
 110
 111         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 112                                            struct samba_kdc_db_context);
 113
 114         return samba_kdc_nextkey(context, kdc_db_ctx, entry);
 115 }
 116
 117 static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
 118 {
 119         talloc_free(db);
 120         return 0;
 121 }
 122
 123 static krb5_error_code
 124 hdb_samba4_check_identical_client_and_server(krb5_context context, HDB *db,
 125                                         hdb_entry_ex *entry,
 126                                         krb5_const_principal target_principal)
 127 {
 128         struct samba_kdc_db_context *kdc_db_ctx;
 129
 130         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 131                                            struct samba_kdc_db_context);
 132
 133         return samba_kdc_check_identical_client_and_server(context, kdc_db_ctx,
 134                                                            entry,
 135                                                            target_principal);
 136 }
 137
 138 static krb5_error_code
 139 hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
 140                                      hdb_entry_ex *entry,
 141                                      krb5_const_principal certificate_principal)
 142 {
 143         struct samba_kdc_db_context *kdc_db_ctx;
 144
 145         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 146                                            struct samba_kdc_db_context);
 147
 148         return samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
 149                                                    entry,
 150                                                    certificate_principal);
 151 }
 152
 153 /* This interface is to be called by the KDC and libnet_keytab_dump,
 154  * which is expecting Samba calling conventions.
 155  * It is also called by a wrapper (hdb_samba4_create) from the
 156  * kpasswdd -> krb5 -> keytab_hdb -> hdb code */
 157
 158 NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
 159                                krb5_context context, struct HDB **db)
 160 {
 161         struct samba_kdc_db_context *kdc_db_ctx;
 162         NTSTATUS nt_status;
 163
 164         *db = talloc(base_ctx, HDB);
 165         if (!*db) {
 166                 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 167                 return NT_STATUS_NO_MEMORY;
 168         }
 169
 170         (*db)->hdb_master_key_set = 0;
 171         (*db)->hdb_db = NULL;
 172         (*db)->hdb_capability_flags = 0;
 173
 174         nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
 175         if (!NT_STATUS_IS_OK(nt_status)) {
 176                 talloc_free(*db);
 177                 return nt_status;
 178         }
 179         (*db)->hdb_db = kdc_db_ctx;
 180
 181         (*db)->hdb_dbc = NULL;
 182         (*db)->hdb_open = hdb_samba4_open;
 183         (*db)->hdb_close = hdb_samba4_close;
 184         (*db)->hdb_fetch_kvno = hdb_samba4_fetch_kvno;
 185         (*db)->hdb_store = hdb_samba4_store;
 186         (*db)->hdb_remove = hdb_samba4_remove;
 187         (*db)->hdb_firstkey = hdb_samba4_firstkey;
 188         (*db)->hdb_nextkey = hdb_samba4_nextkey;
 189         (*db)->hdb_lock = hdb_samba4_lock;
 190         (*db)->hdb_unlock = hdb_samba4_unlock;
 191         (*db)->hdb_rename = hdb_samba4_rename;
 192         /* we don't implement these, as we are not a lockable database */
 193         (*db)->hdb__get = NULL;
 194         (*db)->hdb__put = NULL;
 195         /* kadmin should not be used for deletes - use other tools instead */
 196         (*db)->hdb__del = NULL;
 197         (*db)->hdb_destroy = hdb_samba4_destroy;
 198
 199         (*db)->hdb_auth_status = NULL;
 200         (*db)->hdb_check_constrained_delegation = hdb_samba4_check_identical_client_and_server;
 201         (*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
 202         (*db)->hdb_check_s4u2self = hdb_samba4_check_identical_client_and_server;
 203
 204         return NT_STATUS_OK;
 205 }
 206
 207 static krb5_error_code hdb_samba4_create(krb5_context context, struct HDB **db, const char *arg)
 208 {
 209         NTSTATUS nt_status;
 210         void *ptr;
 211         struct samba_kdc_base_context *base_ctx;
 212
 213         if (sscanf(arg, "&%p", &ptr) != 1) {
 214                 return EINVAL;
 215         }
 216         base_ctx = talloc_get_type_abort(ptr, struct samba_kdc_base_context);
 217         /* The global kdc_mem_ctx and kdc_lp_ctx, Disgusting, ugly hack, but it means one less private hook */
 218         nt_status = hdb_samba4_create_kdc(base_ctx, context, db);
 219
 220         if (NT_STATUS_IS_OK(nt_status)) {
 221                 return 0;
 222         }
 223         return EINVAL;
 224 }
 225
 226 /* Only used in the hdb-backed keytab code
 227  * for a keytab of 'samba4&<address>', to find
 228  * kpasswd's key in the main DB, and to
 229  * copy all the keys into a file (libnet_keytab_export)
 230  *
 231  * The <address> is the string form of a pointer to a talloced struct hdb_samba_context
 232  */
 233 struct hdb_method hdb_samba4 = {
 234         .interface_version = HDB_INTERFACE_VERSION,
 235         .prefix = "samba4",
 236         .create = hdb_samba4_create
 237 };