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dff8da6b | 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
c84142e8 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
c84142e8 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
c84142e8 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 RM |
17 | |
18 | #include <hurd.h> | |
19 | #include <hurd/port.h> | |
20 | #include <hurd/id.h> | |
fb4cc8a0 | 21 | #include <hurdlock.h> |
28f540f4 RM |
22 | #include "set-hooks.h" |
23 | ||
24 | /* Things in the library which want to be run when the auth port changes. */ | |
25 | DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth)); | |
26 | ||
18c2ab9a | 27 | static unsigned int reauth_lock = LLL_LOCK_INITIALIZER; |
28f540f4 RM |
28 | |
29 | /* Set the auth port to NEW, and reauthenticate | |
30 | everything used by the library. */ | |
31 | error_t | |
32 | _hurd_setauth (auth_t new) | |
33 | { | |
34 | error_t err; | |
1e9dc039 | 35 | unsigned int d; |
28f540f4 RM |
36 | mach_port_t newport, ref; |
37 | ||
38 | /* Give the new send right a user reference. | |
39 | This is a good way to check that it is valid. */ | |
40 | if (err = __mach_port_mod_refs (__mach_task_self (), new, | |
41 | MACH_PORT_RIGHT_SEND, 1)) | |
42 | return err; | |
43 | ||
44 | HURD_CRITICAL_BEGIN; | |
45 | ||
46 | /* We lock against another thread doing setauth. Anyone who sets | |
47 | _hurd_ports[INIT_PORT_AUTH] some other way is asking to lose. */ | |
48 | __mutex_lock (&reauth_lock); | |
49 | ||
50 | /* Install the new port in the cell. */ | |
51 | __mutex_lock (&_hurd_id.lock); | |
52 | _hurd_port_set (&_hurd_ports[INIT_PORT_AUTH], new); | |
53 | _hurd_id.valid = 0; | |
54 | if (_hurd_id.rid_auth) | |
55 | { | |
56 | __mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth); | |
57 | _hurd_id.rid_auth = MACH_PORT_NULL; | |
58 | } | |
59 | __mutex_unlock (&_hurd_id.lock); | |
60 | ||
61 | if (_hurd_init_dtable != NULL) | |
62 | /* We just have the simple table we got at startup. | |
63 | Otherwise, a reauth_hook in dtable.c takes care of this. */ | |
64 | for (d = 0; d < _hurd_init_dtablesize; ++d) | |
65 | if (_hurd_init_dtable[d] != MACH_PORT_NULL) | |
66 | { | |
67 | mach_port_t new; | |
68 | ref = __mach_reply_port (); | |
69 | if (! __io_reauthenticate (_hurd_init_dtable[d], | |
34a5a146 JM |
70 | ref, MACH_MSG_TYPE_MAKE_SEND) |
71 | && ! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH], | |
72 | __auth_user_authenticate | |
73 | (port, | |
74 | ref, MACH_MSG_TYPE_MAKE_SEND, | |
75 | &new))) | |
28f540f4 RM |
76 | { |
77 | __mach_port_deallocate (__mach_task_self (), | |
78 | _hurd_init_dtable[d]); | |
79 | _hurd_init_dtable[d] = new; | |
80 | } | |
81 | __mach_port_destroy (__mach_task_self (), ref); | |
82 | } | |
83 | ||
84 | ref = __mach_reply_port (); | |
85 | if (__USEPORT (CRDIR, | |
86 | ! __io_reauthenticate (port, | |
34a5a146 JM |
87 | ref, MACH_MSG_TYPE_MAKE_SEND) |
88 | && ! __auth_user_authenticate (new, | |
89 | ref, MACH_MSG_TYPE_MAKE_SEND, | |
90 | &newport))) | |
28f540f4 RM |
91 | _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport); |
92 | __mach_port_destroy (__mach_task_self (), ref); | |
93 | ||
94 | ref = __mach_reply_port (); | |
95 | if (__USEPORT (CWDIR, | |
96 | ! __io_reauthenticate (port, | |
34a5a146 JM |
97 | ref, MACH_MSG_TYPE_MAKE_SEND) |
98 | && ! __auth_user_authenticate (new, | |
99 | ref, MACH_MSG_TYPE_MAKE_SEND, | |
100 | &newport))) | |
28f540f4 RM |
101 | _hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport); |
102 | __mach_port_destroy (__mach_task_self (), ref); | |
103 | ||
104 | /* Run things which want to do reauthorization stuff. */ | |
105 | RUN_HOOK (_hurd_reauth_hook, (new)); | |
106 | ||
107 | __mutex_unlock (&reauth_lock); | |
108 | ||
109 | HURD_CRITICAL_END; | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | int | |
115 | __setauth (auth_t new) | |
116 | { | |
117 | error_t err = _hurd_setauth (new); | |
118 | return err ? __hurd_fail (err) : 0; | |
119 | } | |
120 | ||
121 | weak_alias (__setauth, setauth) |