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 #include "sdb.h"
  41 #include "sdb_hdb.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         struct sdb_entry_ex sdb_entry_ex = {};
  93         krb5_error_code code, ret;
  94
  95         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
  96                                            struct samba_kdc_db_context);
  97
  98         code = samba_kdc_fetch(context,
  99                                kdc_db_ctx,
 100                                principal,
 101                                flags,
 102                                kvno,
 103                                &sdb_entry_ex);
 104         /*
 105          * If SDB_ERR_WRONG_REALM is returned we need to process the sdb_entry
 106          * to fill the principal in the HDB entry.
 107          */
 108         if (code != 0 && code != SDB_ERR_WRONG_REALM) {
 109                 return code;
 110         }
 111
 112         ret = sdb_entry_ex_to_hdb_entry_ex(context, &sdb_entry_ex, entry_ex);
 113         sdb_free_entry(&sdb_entry_ex);
 114
 115         if (code == 0 && ret != 0) {
 116                 code = ret;
 117         }
 118
 119         return code;
 120 }
 121
 122 static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
 123                                         hdb_entry_ex *entry)
 124 {
 125         struct samba_kdc_db_context *kdc_db_ctx;
 126         struct sdb_entry_ex sdb_entry_ex = {};
 127         krb5_error_code ret;
 128
 129         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 130                                            struct samba_kdc_db_context);
 131
 132         ret = samba_kdc_firstkey(context, kdc_db_ctx, &sdb_entry_ex);
 133         if (ret) {
 134                 return ret;
 135         }
 136
 137         ret = sdb_entry_ex_to_hdb_entry_ex(context, &sdb_entry_ex, entry);
 138         sdb_free_entry(&sdb_entry_ex);
 139         return ret;
 140 }
 141
 142 static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
 143                                    hdb_entry_ex *entry)
 144 {
 145         struct samba_kdc_db_context *kdc_db_ctx;
 146         struct sdb_entry_ex sdb_entry_ex = {};
 147         krb5_error_code ret;
 148
 149         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 150                                            struct samba_kdc_db_context);
 151
 152         ret = samba_kdc_nextkey(context, kdc_db_ctx, &sdb_entry_ex);
 153         if (ret) {
 154                 return ret;
 155         }
 156
 157         ret = sdb_entry_ex_to_hdb_entry_ex(context, &sdb_entry_ex, entry);
 158         sdb_free_entry(&sdb_entry_ex);
 159         return ret;
 160 }
 161
 162 static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
 163 {
 164         talloc_free(db);
 165         return 0;
 166 }
 167
 168 static krb5_error_code
 169 hdb_samba4_check_constrained_delegation(krb5_context context, HDB *db,
 170                                         hdb_entry_ex *entry,
 171                                         krb5_const_principal target_principal)
 172 {
 173         struct samba_kdc_db_context *kdc_db_ctx;
 174         struct samba_kdc_entry *skdc_entry;
 175
 176         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 177                                            struct samba_kdc_db_context);
 178         skdc_entry = talloc_get_type_abort(entry->ctx,
 179                                            struct samba_kdc_entry);
 180
 181         return samba_kdc_check_s4u2proxy(context, kdc_db_ctx,
 182                                          skdc_entry,
 183                                          target_principal);
 184 }
 185
 186 static krb5_error_code
 187 hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
 188                                      hdb_entry_ex *entry,
 189                                      krb5_const_principal certificate_principal)
 190 {
 191         struct samba_kdc_db_context *kdc_db_ctx;
 192         struct samba_kdc_entry *skdc_entry;
 193
 194         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 195                                            struct samba_kdc_db_context);
 196         skdc_entry = talloc_get_type_abort(entry->ctx,
 197                                            struct samba_kdc_entry);
 198
 199         return samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
 200                                                    skdc_entry,
 201                                                    certificate_principal);
 202 }
 203
 204 static krb5_error_code
 205 hdb_samba4_check_s4u2self(krb5_context context, HDB *db,
 206                           hdb_entry_ex *entry,
 207                           krb5_const_principal target_principal)
 208 {
 209         struct samba_kdc_db_context *kdc_db_ctx;
 210         struct samba_kdc_entry *skdc_entry;
 211
 212         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 213                                            struct samba_kdc_db_context);
 214         skdc_entry = talloc_get_type_abort(entry->ctx,
 215                                            struct samba_kdc_entry);
 216
 217         return samba_kdc_check_s4u2self(context, kdc_db_ctx,
 218                                         skdc_entry,
 219                                         target_principal);
 220 }
 221
 222 static krb5_error_code hdb_samba4_auth_status(krb5_context context, HDB *db,
 223                                               hdb_entry_ex *entry,
 224                                               int hdb_auth_status)
 225 {
 226         struct samba_kdc_db_context *kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
 227                                                                         struct samba_kdc_db_context);
 228         struct samba_kdc_entry *p = talloc_get_type(entry->ctx, struct samba_kdc_entry);
 229
 230         if (hdb_auth_status == HDB_AUTH_WRONG_PASSWORD) {
 231                 authsam_update_bad_pwd_count(kdc_db_ctx->samdb, p->msg, ldb_get_default_basedn(kdc_db_ctx->samdb));
 232         } else if (hdb_auth_status == HDB_AUTH_SUCCESS) {
 233                 authsam_zero_bad_pwd_count(kdc_db_ctx->samdb, p->msg);
 234         }
 235         return 0;
 236 }
 237
 238 /* This interface is to be called by the KDC and libnet_keytab_dump,
 239  * which is expecting Samba calling conventions.
 240  * It is also called by a wrapper (hdb_samba4_create) from the
 241  * kpasswdd -> krb5 -> keytab_hdb -> hdb code */
 242
 243 NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
 244                                krb5_context context, struct HDB **db)
 245 {
 246         struct samba_kdc_db_context *kdc_db_ctx;
 247         NTSTATUS nt_status;
 248
 249         if (hdb_interface_version != HDB_INTERFACE_VERSION) {
 250                 krb5_set_error_message(context, EINVAL, "Heimdal HDB interface version mismatch between build-time and run-time libraries!");
 251                 return NT_STATUS_ERROR_DS_INCOMPATIBLE_VERSION;
 252         }
 253
 254         *db = talloc(base_ctx, HDB);
 255         if (!*db) {
 256                 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 257                 return NT_STATUS_NO_MEMORY;
 258         }
 259
 260         (*db)->hdb_master_key_set = 0;
 261         (*db)->hdb_db = NULL;
 262         (*db)->hdb_capability_flags = HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL;
 263
 264         nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
 265         if (!NT_STATUS_IS_OK(nt_status)) {
 266                 talloc_free(*db);
 267                 return nt_status;
 268         }
 269         (*db)->hdb_db = kdc_db_ctx;
 270
 271         (*db)->hdb_dbc = NULL;
 272         (*db)->hdb_open = hdb_samba4_open;
 273         (*db)->hdb_close = hdb_samba4_close;
 274         (*db)->hdb_fetch_kvno = hdb_samba4_fetch_kvno;
 275         (*db)->hdb_store = hdb_samba4_store;
 276         (*db)->hdb_remove = hdb_samba4_remove;
 277         (*db)->hdb_firstkey = hdb_samba4_firstkey;
 278         (*db)->hdb_nextkey = hdb_samba4_nextkey;
 279         (*db)->hdb_lock = hdb_samba4_lock;
 280         (*db)->hdb_unlock = hdb_samba4_unlock;
 281         (*db)->hdb_rename = hdb_samba4_rename;
 282         /* we don't implement these, as we are not a lockable database */
 283         (*db)->hdb__get = NULL;
 284         (*db)->hdb__put = NULL;
 285         /* kadmin should not be used for deletes - use other tools instead */
 286         (*db)->hdb__del = NULL;
 287         (*db)->hdb_destroy = hdb_samba4_destroy;
 288
 289         (*db)->hdb_auth_status = hdb_samba4_auth_status;
 290         (*db)->hdb_check_constrained_delegation = hdb_samba4_check_constrained_delegation;
 291         (*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
 292         (*db)->hdb_check_s4u2self = hdb_samba4_check_s4u2self;
 293
 294         return NT_STATUS_OK;
 295 }