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973c9f4f | 1 | /* 32-bit compatibility syscall for 64-bit systems |
1da177e4 | 2 | * |
3e30148c | 3 | * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved. |
1da177e4 LT |
4 | * Written by David Howells (dhowells@redhat.com) |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/syscalls.h> |
13 | #include <linux/keyctl.h> | |
14 | #include <linux/compat.h> | |
ee009e4a | 15 | #include <linux/slab.h> |
1da177e4 LT |
16 | #include "internal.h" |
17 | ||
ee009e4a DH |
18 | /* |
19 | * Instantiate a key with the specified compatibility multipart payload and | |
20 | * link the key into the destination keyring if one is given. | |
21 | * | |
22 | * The caller must have the appropriate instantiation permit set for this to | |
23 | * work (see keyctl_assume_authority). No other permissions are required. | |
24 | * | |
25 | * If successful, 0 will be returned. | |
26 | */ | |
27 | long compat_keyctl_instantiate_key_iov( | |
28 | key_serial_t id, | |
29 | const struct compat_iovec __user *_payload_iov, | |
30 | unsigned ioc, | |
31 | key_serial_t ringid) | |
32 | { | |
33 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; | |
34 | long ret; | |
35 | ||
36 | if (_payload_iov == 0 || ioc == 0) | |
37 | goto no_payload; | |
38 | ||
39 | ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc, | |
40 | ARRAY_SIZE(iovstack), | |
41 | iovstack, &iov); | |
42 | if (ret < 0) | |
43 | return ret; | |
44 | if (ret == 0) | |
45 | goto no_payload_free; | |
46 | ||
47 | ret = keyctl_instantiate_key_common(id, iov, ioc, ret, ringid); | |
48 | ||
49 | if (iov != iovstack) | |
50 | kfree(iov); | |
51 | return ret; | |
52 | ||
53 | no_payload_free: | |
54 | if (iov != iovstack) | |
55 | kfree(iov); | |
56 | no_payload: | |
57 | return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid); | |
58 | } | |
59 | ||
1da177e4 | 60 | /* |
973c9f4f DH |
61 | * The key control system call, 32-bit compatibility version for 64-bit archs |
62 | * | |
63 | * This should only be called if the 64-bit arch uses weird pointers in 32-bit | |
64 | * mode or doesn't guarantee that the top 32-bits of the argument registers on | |
65 | * taking a 32-bit syscall are zero. If you can, you should call sys_keyctl() | |
66 | * directly. | |
1da177e4 LT |
67 | */ |
68 | asmlinkage long compat_sys_keyctl(u32 option, | |
3e30148c | 69 | u32 arg2, u32 arg3, u32 arg4, u32 arg5) |
1da177e4 LT |
70 | { |
71 | switch (option) { | |
72 | case KEYCTL_GET_KEYRING_ID: | |
73 | return keyctl_get_keyring_ID(arg2, arg3); | |
74 | ||
75 | case KEYCTL_JOIN_SESSION_KEYRING: | |
76 | return keyctl_join_session_keyring(compat_ptr(arg2)); | |
77 | ||
78 | case KEYCTL_UPDATE: | |
79 | return keyctl_update_key(arg2, compat_ptr(arg3), arg4); | |
80 | ||
81 | case KEYCTL_REVOKE: | |
82 | return keyctl_revoke_key(arg2); | |
83 | ||
84 | case KEYCTL_DESCRIBE: | |
85 | return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); | |
86 | ||
87 | case KEYCTL_CLEAR: | |
88 | return keyctl_keyring_clear(arg2); | |
89 | ||
90 | case KEYCTL_LINK: | |
91 | return keyctl_keyring_link(arg2, arg3); | |
92 | ||
93 | case KEYCTL_UNLINK: | |
94 | return keyctl_keyring_unlink(arg2, arg3); | |
95 | ||
96 | case KEYCTL_SEARCH: | |
97 | return keyctl_keyring_search(arg2, compat_ptr(arg3), | |
98 | compat_ptr(arg4), arg5); | |
99 | ||
100 | case KEYCTL_READ: | |
101 | return keyctl_read_key(arg2, compat_ptr(arg3), arg4); | |
102 | ||
103 | case KEYCTL_CHOWN: | |
104 | return keyctl_chown_key(arg2, arg3, arg4); | |
105 | ||
106 | case KEYCTL_SETPERM: | |
107 | return keyctl_setperm_key(arg2, arg3); | |
108 | ||
109 | case KEYCTL_INSTANTIATE: | |
110 | return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4, | |
111 | arg5); | |
112 | ||
113 | case KEYCTL_NEGATE: | |
114 | return keyctl_negate_key(arg2, arg3, arg4); | |
115 | ||
3e30148c DH |
116 | case KEYCTL_SET_REQKEY_KEYRING: |
117 | return keyctl_set_reqkey_keyring(arg2); | |
118 | ||
017679c4 DH |
119 | case KEYCTL_SET_TIMEOUT: |
120 | return keyctl_set_timeout(arg2, arg3); | |
121 | ||
b5f545c8 DH |
122 | case KEYCTL_ASSUME_AUTHORITY: |
123 | return keyctl_assume_authority(arg2); | |
124 | ||
70a5bb72 DH |
125 | case KEYCTL_GET_SECURITY: |
126 | return keyctl_get_security(arg2, compat_ptr(arg3), arg4); | |
127 | ||
ee18d64c DH |
128 | case KEYCTL_SESSION_TO_PARENT: |
129 | return keyctl_session_to_parent(); | |
130 | ||
fdd1b945 DH |
131 | case KEYCTL_REJECT: |
132 | return keyctl_reject_key(arg2, arg3, arg4, arg5); | |
133 | ||
ee009e4a DH |
134 | case KEYCTL_INSTANTIATE_IOV: |
135 | return compat_keyctl_instantiate_key_iov( | |
136 | arg2, compat_ptr(arg3), arg4, arg5); | |
137 | ||
1da177e4 LT |
138 | default: |
139 | return -EOPNOTSUPP; | |
140 | } | |
a8b17ed0 | 141 | } |