2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 name_type_ok(krb5_context context
,
38 krb5_kdc_configuration
*config
,
39 krb5_const_principal principal
)
41 int nt
= krb5_principal_get_type(context
, principal
);
43 if (!krb5_principal_is_krbtgt(context
, principal
))
45 if (nt
== KRB5_NT_SRV_INST
|| nt
== KRB5_NT_UNKNOWN
)
47 if (config
->strict_nametypes
== 0)
52 struct timeval _kdc_now
;
55 _kdc_db_fetch(krb5_context context
,
56 krb5_kdc_configuration
*config
,
57 krb5_const_principal principal
,
63 hdb_entry_ex
*ent
= NULL
;
64 krb5_error_code ret
= HDB_ERR_NOENTRY
;
67 krb5_principal enterprise_principal
= NULL
;
68 krb5_const_principal princ
;
72 if (!name_type_ok(context
, config
, principal
))
75 if (kvno_ptr
!= NULL
&& *kvno_ptr
!= 0) {
77 flags
|= HDB_F_KVNO_SPECIFIED
;
79 flags
|= HDB_F_ALL_KVNOS
;
82 ent
= calloc(1, sizeof (*ent
));
84 return krb5_enomem(context
);
86 if (principal
->name
.name_type
== KRB5_NT_ENTERPRISE_PRINCIPAL
) {
87 if (principal
->name
.name_string
.len
!= 1) {
88 ret
= KRB5_PARSE_MALFORMED
;
89 krb5_set_error_message(context
, ret
,
91 "enterprise name with %d name components",
92 principal
->name
.name_string
.len
);
95 ret
= krb5_parse_name(context
, principal
->name
.name_string
.val
[0],
96 &enterprise_principal
);
101 for (i
= 0; i
< config
->num_db
; i
++) {
102 ret
= config
->db
[i
]->hdb_open(context
, config
->db
[i
], O_RDONLY
, 0);
104 const char *msg
= krb5_get_error_message(context
, ret
);
105 kdc_log(context
, config
, 0, "Failed to open database: %s", msg
);
106 krb5_free_error_message(context
, msg
);
111 if (!(config
->db
[i
]->hdb_capability_flags
& HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL
) && enterprise_principal
)
112 princ
= enterprise_principal
;
114 ret
= config
->db
[i
]->hdb_fetch_kvno(context
,
117 flags
| HDB_F_DECRYPT
,
120 config
->db
[i
]->hdb_close(context
, config
->db
[i
]);
123 case HDB_ERR_WRONG_REALM
:
125 * the ent->entry.principal just contains hints for the client
126 * to retry. This is important for enterprise principal routing
137 case HDB_ERR_NOENTRY
:
138 /* Check the other databases */
143 * This is really important, because errors like
144 * HDB_ERR_NOT_FOUND_HERE (used to indicate to Samba that
145 * the RODC on which this code is running does not have
146 * the key we need, and so a proxy to the KDC is required)
147 * have specific meaning, and need to be propogated up.
154 if (ret
== HDB_ERR_NOENTRY
) {
155 krb5_set_error_message(context
, ret
, "no such entry found in hdb");
158 krb5_free_principal(context
, enterprise_principal
);
164 _kdc_free_ent(krb5_context context
, hdb_entry_ex
*ent
)
166 hdb_free_entry (context
, ent
);
171 * Use the order list of preferred encryption types and sort the
172 * available keys and return the most preferred key.
176 _kdc_get_preferred_key(krb5_context context
,
177 krb5_kdc_configuration
*config
,
180 krb5_enctype
*enctype
,
186 if (config
->use_strongest_server_key
) {
187 const krb5_enctype
*p
= krb5_kerberos_enctypes(context
);
189 for (i
= 0; p
[i
] != (krb5_enctype
)ETYPE_NULL
; i
++) {
190 if (krb5_enctype_valid(context
, p
[i
]) != 0 &&
191 !_kdc_is_weak_exception(h
->entry
.principal
, p
[i
]))
193 ret
= hdb_enctype2key(context
, &h
->entry
, NULL
, p
[i
], key
);
203 for (i
= 0; i
< h
->entry
.keys
.len
; i
++) {
204 if (krb5_enctype_valid(context
, h
->entry
.keys
.val
[i
].key
.keytype
) != 0 &&
205 !_kdc_is_weak_exception(h
->entry
.principal
, h
->entry
.keys
.val
[i
].key
.keytype
))
207 ret
= hdb_enctype2key(context
, &h
->entry
, NULL
,
208 h
->entry
.keys
.val
[i
].key
.keytype
, key
);
212 *enctype
= (*key
)->key
.keytype
;
217 krb5_set_error_message(context
, EINVAL
,
218 "No valid kerberos key found for %s", name
);
219 return EINVAL
; /* XXX */