s4-kdc Add common setup, handle RODC setup case
[samba.git] / 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.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(krb5_context context, HDB *db,
86                                  krb5_const_principal principal,
87                                  unsigned flags,
88                                  hdb_entry_ex *entry_ex)
89 {
90         struct samba_kdc_db_context *kdc_db_ctx;
91
92         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
93                                            struct samba_kdc_db_context);
94
95         return samba_kdc_fetch(context, kdc_db_ctx, principal, flags, entry_ex);
96 }
97
98 static krb5_error_code hdb_samba4_firstkey(krb5_context context, HDB *db, unsigned flags,
99                                         hdb_entry_ex *entry)
100 {
101         struct samba_kdc_db_context *kdc_db_ctx;
102
103         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
104                                            struct samba_kdc_db_context);
105
106         return samba_kdc_firstkey(context, kdc_db_ctx, entry);
107 }
108
109 static krb5_error_code hdb_samba4_nextkey(krb5_context context, HDB *db, unsigned flags,
110                                    hdb_entry_ex *entry)
111 {
112         struct samba_kdc_db_context *kdc_db_ctx;
113
114         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
115                                            struct samba_kdc_db_context);
116
117         return samba_kdc_nextkey(context, kdc_db_ctx, entry);
118 }
119
120 static krb5_error_code hdb_samba4_destroy(krb5_context context, HDB *db)
121 {
122         talloc_free(db);
123         return 0;
124 }
125
126 static krb5_error_code
127 hdb_samba4_check_identical_client_and_server(krb5_context context, HDB *db,
128                                         hdb_entry_ex *entry,
129                                         krb5_const_principal target_principal)
130 {
131         struct samba_kdc_db_context *kdc_db_ctx;
132
133         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
134                                            struct samba_kdc_db_context);
135
136         return samba_kdc_check_identical_client_and_server(context, kdc_db_ctx,
137                                                            entry,
138                                                            target_principal);
139 }
140
141 static krb5_error_code
142 hdb_samba4_check_pkinit_ms_upn_match(krb5_context context, HDB *db,
143                                      hdb_entry_ex *entry,
144                                      krb5_const_principal certificate_principal)
145 {
146         struct samba_kdc_db_context *kdc_db_ctx;
147
148         kdc_db_ctx = talloc_get_type_abort(db->hdb_db,
149                                            struct samba_kdc_db_context);
150
151         return samba_kdc_check_pkinit_ms_upn_match(context, kdc_db_ctx,
152                                                    entry,
153                                                    certificate_principal);
154 }
155
156 /* This interface is to be called by the KDC and libnet_keytab_dump,
157  * which is expecting Samba calling conventions.
158  * It is also called by a wrapper (hdb_samba4_create) from the
159  * kpasswdd -> krb5 -> keytab_hdb -> hdb code */
160
161 NTSTATUS hdb_samba4_create_kdc(struct samba_kdc_base_context *base_ctx,
162                                krb5_context context, struct HDB **db)
163 {
164         struct samba_kdc_db_context *kdc_db_ctx;
165         NTSTATUS nt_status;
166
167         *db = talloc(base_ctx, HDB);
168         if (!*db) {
169                 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
170                 return NT_STATUS_NO_MEMORY;
171         }
172
173         (*db)->hdb_master_key_set = 0;
174         (*db)->hdb_db = NULL;
175         (*db)->hdb_capability_flags = 0;
176
177         nt_status = samba_kdc_setup_db_ctx(*db, base_ctx, &kdc_db_ctx);
178         if (!NT_STATUS_IS_OK(nt_status)) {
179                 talloc_free(*db);
180                 return nt_status;
181         }
182         (*db)->hdb_db = kdc_db_ctx;
183
184         (*db)->hdb_dbc = NULL;
185         (*db)->hdb_open = hdb_samba4_open;
186         (*db)->hdb_close = hdb_samba4_close;
187         (*db)->hdb_fetch = hdb_samba4_fetch;
188         (*db)->hdb_store = hdb_samba4_store;
189         (*db)->hdb_remove = hdb_samba4_remove;
190         (*db)->hdb_firstkey = hdb_samba4_firstkey;
191         (*db)->hdb_nextkey = hdb_samba4_nextkey;
192         (*db)->hdb_lock = hdb_samba4_lock;
193         (*db)->hdb_unlock = hdb_samba4_unlock;
194         (*db)->hdb_rename = hdb_samba4_rename;
195         /* we don't implement these, as we are not a lockable database */
196         (*db)->hdb__get = NULL;
197         (*db)->hdb__put = NULL;
198         /* kadmin should not be used for deletes - use other tools instead */
199         (*db)->hdb__del = NULL;
200         (*db)->hdb_destroy = hdb_samba4_destroy;
201
202         (*db)->hdb_auth_status = NULL;
203         (*db)->hdb_check_constrained_delegation = hdb_samba4_check_identical_client_and_server;
204         (*db)->hdb_check_pkinit_ms_upn_match = hdb_samba4_check_pkinit_ms_upn_match;
205         (*db)->hdb_check_s4u2self = hdb_samba4_check_identical_client_and_server;
206
207         return NT_STATUS_OK;
208 }
209
210 static krb5_error_code hdb_samba4_create(krb5_context context, struct HDB **db, const char *arg)
211 {
212         NTSTATUS nt_status;
213         void *ptr;
214         struct samba_kdc_base_context *base_ctx;
215
216         if (sscanf(arg, "&%p", &ptr) != 1) {
217                 return EINVAL;
218         }
219         base_ctx = talloc_get_type_abort(ptr, struct samba_kdc_base_context);
220         /* The global kdc_mem_ctx and kdc_lp_ctx, Disgusting, ugly hack, but it means one less private hook */
221         nt_status = hdb_samba4_create_kdc(base_ctx, context, db);
222
223         if (NT_STATUS_IS_OK(nt_status)) {
224                 return 0;
225         }
226         return EINVAL;
227 }
228
229 /* Only used in the hdb-backed keytab code
230  * for a keytab of 'samba4&<address>', to find
231  * kpasswd's key in the main DB, and to
232  * copy all the keys into a file (libnet_keytab_export)
233  *
234  * The <address> is the string form of a pointer to a talloced struct hdb_samba_context
235  */
236 struct hdb_method hdb_samba4 = {
237         .interface_version = HDB_INTERFACE_VERSION,
238         .prefix = "samba4",
239         .create = hdb_samba4_create
240 };