Line data Source code
1 : /*
2 : * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 : * (Royal Institute of Technology, Stockholm, Sweden).
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions
8 : * are met:
9 : *
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : *
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.
16 : *
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.
20 : *
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
29 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 : * SUCH DAMAGE.
32 : */
33 :
34 : #include "krb5_locl.h"
35 :
36 : /**
37 : * Free content of krb5_creds.
38 : *
39 : * @param context Kerberos 5 context.
40 : * @param c krb5_creds to free.
41 : *
42 : * @return Returns 0 to indicate success. Otherwise an kerberos et
43 : * error code is returned, see krb5_get_error_message().
44 : *
45 : * @ingroup krb5
46 : */
47 :
48 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
49 2916260 : krb5_free_cred_contents (krb5_context context, krb5_creds *c)
50 : {
51 2916260 : krb5_free_principal (context, c->client);
52 2916260 : c->client = NULL;
53 2916260 : krb5_free_principal (context, c->server);
54 2916260 : c->server = NULL;
55 2916260 : krb5_free_keyblock_contents (context, &c->session);
56 2916260 : krb5_data_free (&c->ticket);
57 2916260 : krb5_data_free (&c->second_ticket);
58 2916260 : free_AuthorizationData (&c->authdata);
59 2916260 : krb5_free_addresses (context, &c->addresses);
60 2916260 : memset(c, 0, sizeof(*c));
61 2916260 : return 0;
62 : }
63 :
64 : /**
65 : * Copy content of krb5_creds.
66 : *
67 : * @param context Kerberos 5 context.
68 : * @param incred source credential
69 : * @param c destination credential, free with krb5_free_cred_contents().
70 : *
71 : * @return Returns 0 to indicate success. Otherwise an kerberos et
72 : * error code is returned, see krb5_get_error_message().
73 : *
74 : * @ingroup krb5
75 : */
76 :
77 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
78 1930333 : krb5_copy_creds_contents (krb5_context context,
79 : const krb5_creds *incred,
80 : krb5_creds *c)
81 : {
82 40266 : krb5_error_code ret;
83 :
84 1930333 : memset(c, 0, sizeof(*c));
85 1930333 : ret = krb5_copy_principal (context, incred->client, &c->client);
86 1930333 : if (ret)
87 0 : goto fail;
88 1930333 : ret = krb5_copy_principal (context, incred->server, &c->server);
89 1930333 : if (ret)
90 0 : goto fail;
91 1930333 : ret = krb5_copy_keyblock_contents (context, &incred->session, &c->session);
92 1930333 : if (ret)
93 0 : goto fail;
94 1930333 : c->times = incred->times;
95 1970599 : ret = krb5_data_copy (&c->ticket,
96 1930333 : incred->ticket.data,
97 1930333 : incred->ticket.length);
98 1930333 : if (ret)
99 0 : goto fail;
100 1970599 : ret = krb5_data_copy (&c->second_ticket,
101 1930333 : incred->second_ticket.data,
102 1930333 : incred->second_ticket.length);
103 1930333 : if (ret)
104 0 : goto fail;
105 1930333 : ret = copy_AuthorizationData(&incred->authdata, &c->authdata);
106 1930333 : if (ret)
107 0 : goto fail;
108 1930333 : ret = krb5_copy_addresses (context,
109 : &incred->addresses,
110 : &c->addresses);
111 1930333 : if (ret)
112 0 : goto fail;
113 1930333 : c->flags = incred->flags;
114 1930333 : return 0;
115 :
116 0 : fail:
117 0 : krb5_free_cred_contents (context, c);
118 0 : return ret;
119 : }
120 :
121 : /**
122 : * Copy krb5_creds.
123 : *
124 : * @param context Kerberos 5 context.
125 : * @param incred source credential
126 : * @param outcred destination credential, free with krb5_free_creds().
127 : *
128 : * @return Returns 0 to indicate success. Otherwise an kerberos et
129 : * error code is returned, see krb5_get_error_message().
130 : *
131 : * @ingroup krb5
132 : */
133 :
134 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
135 2162 : krb5_copy_creds (krb5_context context,
136 : const krb5_creds *incred,
137 : krb5_creds **outcred)
138 : {
139 0 : krb5_creds *c;
140 :
141 2162 : c = calloc(1, sizeof(*c));
142 2162 : if (c == NULL)
143 0 : return krb5_enomem(context);
144 2162 : *outcred = c;
145 2162 : return krb5_copy_creds_contents (context, incred, c);
146 : }
147 :
148 : /**
149 : * Free krb5_creds.
150 : *
151 : * @param context Kerberos 5 context.
152 : * @param c krb5_creds to free.
153 : *
154 : * @return Returns 0 to indicate success. Otherwise an kerberos et
155 : * error code is returned, see krb5_get_error_message().
156 : *
157 : * @ingroup krb5
158 : */
159 :
160 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
161 284346 : krb5_free_creds (krb5_context context, krb5_creds *c)
162 : {
163 284346 : if (c != NULL)
164 200897 : krb5_free_cred_contents(context, c);
165 284346 : free(c);
166 284346 : return 0;
167 : }
168 :
169 : /* XXX this do not belong here */
170 : static krb5_boolean
171 0 : krb5_times_equal(const krb5_times *a, const krb5_times *b)
172 : {
173 0 : return a->starttime == b->starttime &&
174 0 : a->authtime == b->authtime &&
175 0 : a->endtime == b->endtime &&
176 0 : a->renew_till == b->renew_till;
177 : }
178 :
179 : /**
180 : * Return TRUE if `mcreds' and `creds' are equal (`whichfields'
181 : * determines what equal means).
182 : *
183 : *
184 : * The following flags, set in whichfields affects the comparison:
185 : * - KRB5_TC_MATCH_SRV_NAMEONLY Consider all realms equal when comparing the service principal.
186 : * - KRB5_TC_MATCH_KEYTYPE Compare enctypes.
187 : * - KRB5_TC_MATCH_FLAGS_EXACT Make sure that the ticket flags are identical.
188 : * - KRB5_TC_MATCH_FLAGS Make sure that all ticket flags set in mcreds are also present in creds .
189 : * - KRB5_TC_MATCH_TIMES_EXACT Compares the ticket times exactly.
190 : * - KRB5_TC_MATCH_TIMES Compares only the expiration times of the creds.
191 : * - KRB5_TC_MATCH_AUTHDATA Compares the authdata fields.
192 : * - KRB5_TC_MATCH_2ND_TKT Compares the second tickets (used by user-to-user authentication).
193 : * - KRB5_TC_MATCH_IS_SKEY Compares the existence of the second ticket.
194 : *
195 : * @param context Kerberos 5 context.
196 : * @param whichfields which fields to compare.
197 : * @param mcreds cred to compare with.
198 : * @param creds cred to compare with.
199 : *
200 : * @return return TRUE if mcred and creds are equal, FALSE if not.
201 : *
202 : * @ingroup krb5
203 : */
204 :
205 : KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
206 1218047 : krb5_compare_creds(krb5_context context, krb5_flags whichfields,
207 : const krb5_creds * mcreds, const krb5_creds * creds)
208 : {
209 1218047 : krb5_boolean match = TRUE;
210 :
211 1218047 : if (match && mcreds->server) {
212 1218047 : if (whichfields & (KRB5_TC_DONT_MATCH_REALM | KRB5_TC_MATCH_SRV_NAMEONLY))
213 59376 : match = krb5_principal_compare_any_realm (context, mcreds->server,
214 59376 : creds->server);
215 : else
216 1158671 : match = krb5_principal_compare (context, mcreds->server,
217 1158671 : creds->server);
218 : }
219 :
220 1218047 : if (match && mcreds->client) {
221 226030 : if(whichfields & KRB5_TC_DONT_MATCH_REALM)
222 0 : match = krb5_principal_compare_any_realm (context, mcreds->client,
223 0 : creds->client);
224 : else
225 226030 : match = krb5_principal_compare (context, mcreds->client,
226 226030 : creds->client);
227 : }
228 :
229 1218047 : if (match && (whichfields & KRB5_TC_MATCH_KEYTYPE))
230 0 : match = mcreds->session.keytype == creds->session.keytype;
231 :
232 1218047 : if (match && (whichfields & KRB5_TC_MATCH_FLAGS_EXACT))
233 0 : match = mcreds->flags.i == creds->flags.i;
234 :
235 1218047 : if (match && (whichfields & KRB5_TC_MATCH_FLAGS))
236 0 : match = (creds->flags.i & mcreds->flags.i) == mcreds->flags.i;
237 :
238 1218047 : if (match && (whichfields & KRB5_TC_MATCH_TIMES_EXACT))
239 0 : match = krb5_times_equal(&mcreds->times, &creds->times);
240 :
241 1218047 : if (match && (whichfields & KRB5_TC_MATCH_TIMES))
242 : /* compare only expiration times */
243 214174 : match = (mcreds->times.renew_till <= creds->times.renew_till) &&
244 109157 : (mcreds->times.endtime <= creds->times.endtime);
245 :
246 1218047 : if (match && (whichfields & KRB5_TC_MATCH_AUTHDATA)) {
247 0 : unsigned int i;
248 0 : if(mcreds->authdata.len != creds->authdata.len)
249 0 : match = FALSE;
250 : else
251 0 : for(i = 0; match && i < mcreds->authdata.len; i++)
252 0 : match = (mcreds->authdata.val[i].ad_type ==
253 0 : creds->authdata.val[i].ad_type) &&
254 0 : (krb5_data_cmp(&mcreds->authdata.val[i].ad_data,
255 0 : &creds->authdata.val[i].ad_data) == 0);
256 : }
257 1218047 : if (match && (whichfields & KRB5_TC_MATCH_2ND_TKT))
258 0 : match = (krb5_data_cmp(&mcreds->second_ticket, &creds->second_ticket) == 0);
259 :
260 1218047 : if (match && (whichfields & KRB5_TC_MATCH_IS_SKEY))
261 0 : match = ((mcreds->second_ticket.length == 0) ==
262 0 : (creds->second_ticket.length == 0));
263 :
264 1218047 : return match;
265 : }
266 :
267 : /**
268 : * Returns the ticket flags for the credentials in creds.
269 : * See also krb5_ticket_get_flags().
270 : *
271 : * @param creds credential to get ticket flags from
272 : *
273 : * @return ticket flags
274 : *
275 : * @ingroup krb5
276 : */
277 :
278 : KRB5_LIB_FUNCTION unsigned long KRB5_LIB_CALL
279 0 : krb5_creds_get_ticket_flags(krb5_creds *creds)
280 : {
281 0 : return TicketFlags2int(creds->flags.b);
282 : }
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