2 * Copyright (c) 2005, PADL Software Pty Ltd.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of PADL Software nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 kcm_access(krb5_context context
,
48 KCM_ASSERT_VALID(ccache
);
51 case KCM_OP_INITIALIZE
:
54 case KCM_OP_REMOVE_CRED
:
55 case KCM_OP_SET_FLAGS
:
58 case KCM_OP_GET_INITIAL_TICKET
:
59 case KCM_OP_GET_TICKET
:
60 case KCM_OP_MOVE_CACHE
:
69 case KCM_OP_GET_PRINCIPAL
:
70 case KCM_OP_GET_FIRST
:
79 if (ccache
->flags
& KCM_FLAGS_OWNER_IS_SYSTEM
) {
80 /* System caches cannot be reinitialized or destroyed by users */
81 if (opcode
== KCM_OP_INITIALIZE
||
82 opcode
== KCM_OP_DESTROY
||
83 opcode
== KCM_OP_REMOVE_CRED
||
84 opcode
== KCM_OP_MOVE_CACHE
) {
89 /* Let root always read system caches */
90 if (client
->uid
== 0) {
98 /* Root may do whatever they like */
99 if (client
->uid
== ccache
->uid
|| CLIENT_IS_ROOT(client
)) {
104 } else if (client
->gid
== ccache
->gid
|| CLIENT_IS_ROOT(client
)) {
116 ret
= ((ccache
->mode
& mask
) == mask
) ? 0 : KRB5_FCC_PERM
;
120 kcm_log(2, "Process %d is not permitted to call %s on cache %s",
121 client
->pid
, kcm_op2string(opcode
), ccache
->name
);
128 kcm_chmod(krb5_context context
,
133 KCM_ASSERT_VALID(ccache
);
135 /* System cache mode can only be set at startup */
136 if (ccache
->flags
& KCM_FLAGS_OWNER_IS_SYSTEM
)
137 return KRB5_FCC_PERM
;
139 if (ccache
->uid
!= client
->uid
)
140 return KRB5_FCC_PERM
;
142 if (ccache
->gid
!= client
->gid
)
143 return KRB5_FCC_PERM
;
145 HEIMDAL_MUTEX_lock(&ccache
->mutex
);
149 HEIMDAL_MUTEX_unlock(&ccache
->mutex
);
155 kcm_chown(krb5_context context
,
161 KCM_ASSERT_VALID(ccache
);
163 /* System cache owner can only be set at startup */
164 if (ccache
->flags
& KCM_FLAGS_OWNER_IS_SYSTEM
)
165 return KRB5_FCC_PERM
;
167 if (ccache
->uid
!= client
->uid
)
168 return KRB5_FCC_PERM
;
170 if (ccache
->gid
!= client
->gid
)
171 return KRB5_FCC_PERM
;
173 HEIMDAL_MUTEX_lock(&ccache
->mutex
);
178 HEIMDAL_MUTEX_unlock(&ccache
->mutex
);