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
275
276
277
278
279
280
281
282
|
/*
* Copyright (c) 1997 - 2005 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"
/**
* Free content of krb5_creds.
*
* @param context Kerberos 5 context.
* @param c krb5_creds to free.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_free_cred_contents (krb5_context context, krb5_creds *c)
{
krb5_free_principal (context, c->client);
c->client = NULL;
krb5_free_principal (context, c->server);
c->server = NULL;
krb5_free_keyblock_contents (context, &c->session);
krb5_data_free (&c->ticket);
krb5_data_free (&c->second_ticket);
free_AuthorizationData (&c->authdata);
krb5_free_addresses (context, &c->addresses);
memset(c, 0, sizeof(*c));
return 0;
}
/**
* Copy content of krb5_creds.
*
* @param context Kerberos 5 context.
* @param incred source credential
* @param c destination credential, free with krb5_free_cred_contents().
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_copy_creds_contents (krb5_context context,
const krb5_creds *incred,
krb5_creds *c)
{
krb5_error_code ret;
memset(c, 0, sizeof(*c));
ret = krb5_copy_principal (context, incred->client, &c->client);
if (ret)
goto fail;
ret = krb5_copy_principal (context, incred->server, &c->server);
if (ret)
goto fail;
ret = krb5_copy_keyblock_contents (context, &incred->session, &c->session);
if (ret)
goto fail;
c->times = incred->times;
ret = krb5_data_copy (&c->ticket,
incred->ticket.data,
incred->ticket.length);
if (ret)
goto fail;
ret = krb5_data_copy (&c->second_ticket,
incred->second_ticket.data,
incred->second_ticket.length);
if (ret)
goto fail;
ret = copy_AuthorizationData(&incred->authdata, &c->authdata);
if (ret)
goto fail;
ret = krb5_copy_addresses (context,
&incred->addresses,
&c->addresses);
if (ret)
goto fail;
c->flags = incred->flags;
return 0;
fail:
krb5_free_cred_contents (context, c);
return ret;
}
/**
* Copy krb5_creds.
*
* @param context Kerberos 5 context.
* @param incred source credential
* @param outcred destination credential, free with krb5_free_creds().
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_copy_creds (krb5_context context,
const krb5_creds *incred,
krb5_creds **outcred)
{
krb5_creds *c;
c = calloc(1, sizeof(*c));
if (c == NULL)
return krb5_enomem(context);
*outcred = c;
return krb5_copy_creds_contents (context, incred, c);
}
/**
* Free krb5_creds.
*
* @param context Kerberos 5 context.
* @param c krb5_creds to free.
*
* @return Returns 0 to indicate success. Otherwise an kerberos et
* error code is returned, see krb5_get_error_message().
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_free_creds (krb5_context context, krb5_creds *c)
{
if (c != NULL)
krb5_free_cred_contents(context, c);
free(c);
return 0;
}
/* XXX this do not belong here */
static krb5_boolean
krb5_times_equal(const krb5_times *a, const krb5_times *b)
{
return a->starttime == b->starttime &&
a->authtime == b->authtime &&
a->endtime == b->endtime &&
a->renew_till == b->renew_till;
}
/**
* Return TRUE if `mcreds' and `creds' are equal (`whichfields'
* determines what equal means).
*
*
* The following flags, set in whichfields affects the comparison:
* - KRB5_TC_MATCH_SRV_NAMEONLY Consider all realms equal when comparing the service principal.
* - KRB5_TC_MATCH_KEYTYPE Compare enctypes.
* - KRB5_TC_MATCH_FLAGS_EXACT Make sure that the ticket flags are identical.
* - KRB5_TC_MATCH_FLAGS Make sure that all ticket flags set in mcreds are also present in creds .
* - KRB5_TC_MATCH_TIMES_EXACT Compares the ticket times exactly.
* - KRB5_TC_MATCH_TIMES Compares only the expiration times of the creds.
* - KRB5_TC_MATCH_AUTHDATA Compares the authdata fields.
* - KRB5_TC_MATCH_2ND_TKT Compares the second tickets (used by user-to-user authentication).
* - KRB5_TC_MATCH_IS_SKEY Compares the existence of the second ticket.
*
* @param context Kerberos 5 context.
* @param whichfields which fields to compare.
* @param mcreds cred to compare with.
* @param creds cred to compare with.
*
* @return return TRUE if mcred and creds are equal, FALSE if not.
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_compare_creds(krb5_context context, krb5_flags whichfields,
const krb5_creds * mcreds, const krb5_creds * creds)
{
krb5_boolean match = TRUE;
if (match && mcreds->server) {
if (whichfields & (KRB5_TC_DONT_MATCH_REALM | KRB5_TC_MATCH_SRV_NAMEONLY))
match = krb5_principal_compare_any_realm (context, mcreds->server,
creds->server);
else
match = krb5_principal_compare (context, mcreds->server,
creds->server);
}
if (match && mcreds->client) {
if(whichfields & KRB5_TC_DONT_MATCH_REALM)
match = krb5_principal_compare_any_realm (context, mcreds->client,
creds->client);
else
match = krb5_principal_compare (context, mcreds->client,
creds->client);
}
if (match && (whichfields & KRB5_TC_MATCH_KEYTYPE))
match = mcreds->session.keytype == creds->session.keytype;
if (match && (whichfields & KRB5_TC_MATCH_FLAGS_EXACT))
match = mcreds->flags.i == creds->flags.i;
if (match && (whichfields & KRB5_TC_MATCH_FLAGS))
match = (creds->flags.i & mcreds->flags.i) == mcreds->flags.i;
if (match && (whichfields & KRB5_TC_MATCH_TIMES_EXACT))
match = krb5_times_equal(&mcreds->times, &creds->times);
if (match && (whichfields & KRB5_TC_MATCH_TIMES))
/* compare only expiration times */
match = (mcreds->times.renew_till <= creds->times.renew_till) &&
(mcreds->times.endtime <= creds->times.endtime);
if (match && (whichfields & KRB5_TC_MATCH_AUTHDATA)) {
unsigned int i;
if(mcreds->authdata.len != creds->authdata.len)
match = FALSE;
else
for(i = 0; match && i < mcreds->authdata.len; i++)
match = (mcreds->authdata.val[i].ad_type ==
creds->authdata.val[i].ad_type) &&
(krb5_data_cmp(&mcreds->authdata.val[i].ad_data,
&creds->authdata.val[i].ad_data) == 0);
}
if (match && (whichfields & KRB5_TC_MATCH_2ND_TKT))
match = (krb5_data_cmp(&mcreds->second_ticket, &creds->second_ticket) == 0);
if (match && (whichfields & KRB5_TC_MATCH_IS_SKEY))
match = ((mcreds->second_ticket.length == 0) ==
(creds->second_ticket.length == 0));
return match;
}
/**
* Returns the ticket flags for the credentials in creds.
* See also krb5_ticket_get_flags().
*
* @param creds credential to get ticket flags from
*
* @return ticket flags
*
* @ingroup krb5
*/
KRB5_LIB_FUNCTION unsigned long KRB5_LIB_CALL
krb5_creds_get_ticket_flags(krb5_creds *creds)
{
return TicketFlags2int(creds->flags.b);
}
|
