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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
|
/*
* 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 "krb5_locl.h"
RCSID("$Id$");
krb5_error_code KRB5_LIB_FUNCTION
krb5_free_ticket(krb5_context context,
krb5_ticket *ticket)
{
free_EncTicketPart(&ticket->ticket);
krb5_free_principal(context, ticket->client);
krb5_free_principal(context, ticket->server);
free(ticket);
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_ticket(krb5_context context,
const krb5_ticket *from,
krb5_ticket **to)
{
krb5_error_code ret;
krb5_ticket *tmp;
*to = NULL;
tmp = malloc(sizeof(*tmp));
if(tmp == NULL) {
krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
return ENOMEM;
}
if((ret = copy_EncTicketPart(&from->ticket, &tmp->ticket))){
free(tmp);
return ret;
}
ret = krb5_copy_principal(context, from->client, &tmp->client);
if(ret){
free_EncTicketPart(&tmp->ticket);
free(tmp);
return ret;
}
ret = krb5_copy_principal(context, from->server, &tmp->server);
if(ret){
krb5_free_principal(context, tmp->client);
free_EncTicketPart(&tmp->ticket);
free(tmp);
return ret;
}
*to = tmp;
return 0;
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_client(krb5_context context,
const krb5_ticket *ticket,
krb5_principal *client)
{
return krb5_copy_principal(context, ticket->client, client);
}
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_server(krb5_context context,
const krb5_ticket *ticket,
krb5_principal *server)
{
return krb5_copy_principal(context, ticket->server, server);
}
time_t KRB5_LIB_FUNCTION
krb5_ticket_get_endtime(krb5_context context,
const krb5_ticket *ticket)
{
return ticket->ticket.endtime;
}
static int
find_type_in_ad(krb5_context context,
int type,
krb5_data *data,
krb5_boolean *found,
krb5_boolean failp,
krb5_keyblock *sessionkey,
const AuthorizationData *ad,
int level)
{
krb5_error_code ret = 0;
int i;
if (level > 9) {
ret = ENOENT; /* XXX */
krb5_set_error_message(context, ret,
"Authorization data nested deeper "
"then %d levels, stop searching", level);
goto out;
}
/*
* Only copy out the element the first time we get to it, we need
* to run over the whole authorization data fields to check if
* there are any container clases we need to care about.
*/
for (i = 0; i < ad->len; i++) {
if (!*found && ad->val[i].ad_type == type) {
ret = der_copy_octet_string(&ad->val[i].ad_data, data);
if (ret) {
krb5_set_error_message(context, ret, "malloc: out of memory");
goto out;
}
*found = TRUE;
continue;
}
switch (ad->val[i].ad_type) {
case KRB5_AUTHDATA_IF_RELEVANT: {
AuthorizationData child;
ret = decode_AuthorizationData(ad->val[i].ad_data.data,
ad->val[i].ad_data.length,
&child,
NULL);
if (ret) {
krb5_set_error_message(context, ret, "Failed to decode "
"IF_RELEVANT with %d", (int)ret);
goto out;
}
ret = find_type_in_ad(context, type, data, found, FALSE,
sessionkey, &child, level + 1);
free_AuthorizationData(&child);
if (ret)
goto out;
break;
}
#if 0 /* XXX test */
case KRB5_AUTHDATA_KDC_ISSUED: {
AD_KDCIssued child;
ret = decode_AD_KDCIssued(ad->val[i].ad_data.data,
ad->val[i].ad_data.length,
&child,
NULL);
if (ret) {
krb5_set_error_message(context, ret, "Failed to decode "
"AD_KDCIssued with %d", ret);
goto out;
}
if (failp) {
krb5_boolean valid;
krb5_data buf;
size_t len;
ASN1_MALLOC_ENCODE(AuthorizationData, buf.data, buf.length,
&child.elements, &len, ret);
if (ret) {
free_AD_KDCIssued(&child);
krb5_clear_error_string(context);
goto out;
}
if(buf.length != len)
krb5_abortx(context, "internal error in ASN.1 encoder");
ret = krb5_c_verify_checksum(context, sessionkey, 19, &buf,
&child.ad_checksum, &valid);
krb5_data_free(&buf);
if (ret) {
free_AD_KDCIssued(&child);
goto out;
}
if (!valid) {
krb5_clear_error_string(context);
ret = ENOENT;
free_AD_KDCIssued(&child);
goto out;
}
}
ret = find_type_in_ad(context, type, data, found, failp, sessionkey,
&child.elements, level + 1);
free_AD_KDCIssued(&child);
if (ret)
goto out;
break;
}
#endif
case KRB5_AUTHDATA_AND_OR:
if (!failp)
break;
ret = ENOENT; /* XXX */
krb5_set_error_message(context, ret, "Authorization data contains "
"AND-OR element that is unknown to the "
"application");
goto out;
default:
if (!failp)
break;
ret = ENOENT; /* XXX */
krb5_set_error_message(context, ret, "Authorization data contains "
"unknown type (%d) ", ad->val[i].ad_type);
goto out;
}
}
out:
if (ret) {
if (*found) {
krb5_data_free(data);
*found = 0;
}
}
return ret;
}
/*
* Extract the authorization data type of `type' from the
* 'ticket'. Store the field in `data'. This function is to use for
* kerberos applications.
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_ticket_get_authorization_data_type(krb5_context context,
krb5_ticket *ticket,
int type,
krb5_data *data)
{
AuthorizationData *ad;
krb5_error_code ret;
krb5_boolean found = FALSE;
krb5_data_zero(data);
ad = ticket->ticket.authorization_data;
if (ticket->ticket.authorization_data == NULL) {
krb5_set_error_message(context, ENOENT,
"Ticket have not authorization data");
return ENOENT; /* XXX */
}
ret = find_type_in_ad(context, type, data, &found, TRUE,
&ticket->ticket.key, ad, 0);
if (ret)
return ret;
if (!found) {
krb5_set_error_message(context, ENOENT, "Ticket have not "
"authorization data of type %d", type);
return ENOENT; /* XXX */
}
return 0;
}
|
