2 * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Kungliga Tekniska
20 * Högskolan and its contributors.
22 * 4. Neither the name of the Institute nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #include <krb5_locl.h>
44 krb5_rd_priv(krb5_context context
,
45 krb5_auth_context auth_context
,
46 const krb5_data
*inbuf
,
48 /*krb5_replay_data*/ void *outdata
)
57 ret
= decode_KRB_PRIV (inbuf
->data
, inbuf
->length
, &priv
, &len
);
61 ret
= KRB5KRB_AP_ERR_BADVERSION
;
64 if (priv
.msg_type
!= krb_priv
) {
65 ret
= KRB5KRB_AP_ERR_MSG_TYPE
;
69 /* XXX - Is this right? */
71 if (auth_context
->local_subkey
.keytype
)
72 key
= &auth_context
->local_subkey
;
73 else if (auth_context
->remote_subkey
.keytype
)
74 key
= &auth_context
->remote_subkey
;
76 key
= auth_context
->keyblock
;
78 ret
= krb5_decrypt (context
,
79 priv
.enc_part
.cipher
.data
,
80 priv
.enc_part
.cipher
.length
,
87 ret
= decode_EncKrbPrivPart (plain
.data
, plain
.length
, &part
, &len
);
88 krb5_data_free (&plain
);
92 /* check sender address */
95 && auth_context
->remote_address
96 && !krb5_address_compare (context
,
97 auth_context
->remote_address
,
99 ret
= KRB5KRB_AP_ERR_BADADDR
;
103 /* check receiver address */
106 && auth_context
->local_address
107 && !krb5_address_compare (context
,
108 auth_context
->local_address
,
110 ret
= KRB5KRB_AP_ERR_BADADDR
;
114 /* check timestamp */
115 if (auth_context
->flags
& KRB5_AUTH_CONTEXT_DO_TIME
) {
118 krb5_timeofday (context
, &sec
);
119 if (part
.timestamp
== NULL
||
121 abs(*part
.timestamp
- sec
) > context
->max_skew
) {
122 ret
= KRB5KRB_AP_ERR_SKEW
;
127 /* XXX - check replay cache */
129 /* check sequence number */
130 if (auth_context
->flags
& KRB5_AUTH_CONTEXT_DO_SEQUENCE
) {
131 if (part
.seq_number
== NULL
||
132 *part
.seq_number
!= ++auth_context
->remote_seqnumber
) {
133 ret
= KRB5KRB_AP_ERR_BADORDER
;
138 ret
= krb5_data_copy (outbuf
, part
.user_data
.data
, part
.user_data
.length
);
142 free_EncKrbPrivPart (&part
);
143 free_KRB_PRIV (&priv
);
147 free_EncKrbPrivPart (&part
);
150 free_KRB_PRIV (&priv
);