1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "kdc_locl.h"
struct timeval _kdc_now;
krb5_error_code
_kdc_db_fetch(krb5_context context,
krb5_kdc_configuration *config,
krb5_const_principal principal,
unsigned flags,
krb5int32 *kvno_ptr,
HDB **db,
hdb_entry_ex **h)
{
hdb_entry_ex *ent;
krb5_error_code ret = HDB_ERR_NOENTRY;
int i;
unsigned kvno = 0;
if (kvno_ptr) {
kvno = *kvno_ptr;
flags |= HDB_F_KVNO_SPECIFIED;
}
ent = calloc (1, sizeof (*ent));
if (ent == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
for(i = 0; i < config->num_db; i++) {
krb5_principal enterprise_principal = NULL;
if (!(config->db[i]->hdb_capability_flags & HDB_CAP_F_HANDLE_ENTERPRISE_PRINCIPAL)
&& principal->name.name_type == KRB5_NT_ENTERPRISE_PRINCIPAL) {
if (principal->name.name_string.len != 1) {
ret = KRB5_PARSE_MALFORMED;
krb5_set_error_message(context, ret,
"malformed request: "
"enterprise name with %d name components",
principal->name.name_string.len);
free(ent);
return ret;
}
ret = krb5_parse_name(context, principal->name.name_string.val[0],
&enterprise_principal);
if (ret) {
free(ent);
return ret;
}
principal = enterprise_principal;
}
ret = config->db[i]->hdb_open(context, config->db[i], O_RDONLY, 0);
if (ret) {
const char *msg = krb5_get_error_message(context, ret);
kdc_log(context, config, 0, "Failed to open database: %s", msg);
krb5_free_error_message(context, msg);
continue;
}
ret = config->db[i]->hdb_fetch_kvno(context,
config->db[i],
principal,
flags | HDB_F_DECRYPT,
kvno,
ent);
krb5_free_principal(context, enterprise_principal);
config->db[i]->hdb_close(context, config->db[i]);
if(ret == 0) {
if (db)
*db = config->db[i];
*h = ent;
return 0;
}
}
free(ent);
krb5_set_error_message(context, ret,
"no such entry found in hdb");
return ret;
}
void
_kdc_free_ent(krb5_context context, hdb_entry_ex *ent)
{
hdb_free_entry (context, ent);
free (ent);
}
/*
* Use the order list of preferred encryption types and sort the
* available keys and return the most preferred key.
*/
krb5_error_code
_kdc_get_preferred_key(krb5_context context,
krb5_kdc_configuration *config,
hdb_entry_ex *h,
const char *name,
krb5_enctype *enctype,
Key **key)
{
const krb5_enctype *p;
krb5_error_code ret;
int i;
p = krb5_kerberos_enctypes(context);
for (i = 0; p[i] != ETYPE_NULL; i++) {
if (krb5_enctype_valid(context, p[i]) != 0)
continue;
ret = hdb_enctype2key(context, &h->entry, p[i], key);
if (ret == 0) {
*enctype = p[i];
return 0;
}
}
krb5_set_error_message(context, EINVAL,
"No valid kerberos key found for %s", name);
return EINVAL;
}
|
