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1/* 32-bit compatibility syscall for 64-bit systems
2 *
3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
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
12#include <linux/syscalls.h>
13#include <linux/keyctl.h>
14#include <linux/compat.h>
15#include <linux/slab.h>
16#include "internal.h"
17
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 */
27static 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 struct iov_iter from;
35 long ret;
36
37 if (!_payload_iov)
38 ioc = 0;
39
40 ret = compat_import_iovec(WRITE, _payload_iov, ioc,
41 ARRAY_SIZE(iovstack), &iov,
42 &from);
43 if (ret < 0)
44 return ret;
45
46 ret = keyctl_instantiate_key_common(id, &from, ringid);
47 kfree(iov);
48 return ret;
49}
50
51/*
52 * The key control system call, 32-bit compatibility version for 64-bit archs
53 *
54 * This should only be called if the 64-bit arch uses weird pointers in 32-bit
55 * mode or doesn't guarantee that the top 32-bits of the argument registers on
56 * taking a 32-bit syscall are zero. If you can, you should call sys_keyctl()
57 * directly.
58 */
59COMPAT_SYSCALL_DEFINE5(keyctl, u32, option,
60 u32, arg2, u32, arg3, u32, arg4, u32, arg5)
61{
62 switch (option) {
63 case KEYCTL_GET_KEYRING_ID:
64 return keyctl_get_keyring_ID(arg2, arg3);
65
66 case KEYCTL_JOIN_SESSION_KEYRING:
67 return keyctl_join_session_keyring(compat_ptr(arg2));
68
69 case KEYCTL_UPDATE:
70 return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
71
72 case KEYCTL_REVOKE:
73 return keyctl_revoke_key(arg2);
74
75 case KEYCTL_DESCRIBE:
76 return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
77
78 case KEYCTL_CLEAR:
79 return keyctl_keyring_clear(arg2);
80
81 case KEYCTL_LINK:
82 return keyctl_keyring_link(arg2, arg3);
83
84 case KEYCTL_UNLINK:
85 return keyctl_keyring_unlink(arg2, arg3);
86
87 case KEYCTL_SEARCH:
88 return keyctl_keyring_search(arg2, compat_ptr(arg3),
89 compat_ptr(arg4), arg5);
90
91 case KEYCTL_READ:
92 return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
93
94 case KEYCTL_CHOWN:
95 return keyctl_chown_key(arg2, arg3, arg4);
96
97 case KEYCTL_SETPERM:
98 return keyctl_setperm_key(arg2, arg3);
99
100 case KEYCTL_INSTANTIATE:
101 return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
102 arg5);
103
104 case KEYCTL_NEGATE:
105 return keyctl_negate_key(arg2, arg3, arg4);
106
107 case KEYCTL_SET_REQKEY_KEYRING:
108 return keyctl_set_reqkey_keyring(arg2);
109
110 case KEYCTL_SET_TIMEOUT:
111 return keyctl_set_timeout(arg2, arg3);
112
113 case KEYCTL_ASSUME_AUTHORITY:
114 return keyctl_assume_authority(arg2);
115
116 case KEYCTL_GET_SECURITY:
117 return keyctl_get_security(arg2, compat_ptr(arg3), arg4);
118
119 case KEYCTL_SESSION_TO_PARENT:
120 return keyctl_session_to_parent();
121
122 case KEYCTL_REJECT:
123 return keyctl_reject_key(arg2, arg3, arg4, arg5);
124
125 case KEYCTL_INSTANTIATE_IOV:
126 return compat_keyctl_instantiate_key_iov(
127 arg2, compat_ptr(arg3), arg4, arg5);
128
129 case KEYCTL_INVALIDATE:
130 return keyctl_invalidate_key(arg2);
131
132 case KEYCTL_GET_PERSISTENT:
133 return keyctl_get_persistent(arg2, arg3);
134
135 default:
136 return -EOPNOTSUPP;
137 }
138}
1/* 32-bit compatibility syscall for 64-bit systems
2 *
3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
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
12#include <linux/syscalls.h>
13#include <linux/keyctl.h>
14#include <linux/compat.h>
15#include <linux/slab.h>
16#include "internal.h"
17
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 */
27long 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
53no_payload_free:
54 if (iov != iovstack)
55 kfree(iov);
56no_payload:
57 return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid);
58}
59
60/*
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.
67 */
68asmlinkage long compat_sys_keyctl(u32 option,
69 u32 arg2, u32 arg3, u32 arg4, u32 arg5)
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
116 case KEYCTL_SET_REQKEY_KEYRING:
117 return keyctl_set_reqkey_keyring(arg2);
118
119 case KEYCTL_SET_TIMEOUT:
120 return keyctl_set_timeout(arg2, arg3);
121
122 case KEYCTL_ASSUME_AUTHORITY:
123 return keyctl_assume_authority(arg2);
124
125 case KEYCTL_GET_SECURITY:
126 return keyctl_get_security(arg2, compat_ptr(arg3), arg4);
127
128 case KEYCTL_SESSION_TO_PARENT:
129 return keyctl_session_to_parent();
130
131 case KEYCTL_REJECT:
132 return keyctl_reject_key(arg2, arg3, arg4, arg5);
133
134 case KEYCTL_INSTANTIATE_IOV:
135 return compat_keyctl_instantiate_key_iov(
136 arg2, compat_ptr(arg3), arg4, arg5);
137
138 case KEYCTL_INVALIDATE:
139 return keyctl_invalidate_key(arg2);
140
141 default:
142 return -EOPNOTSUPP;
143 }
144}