1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 32-bit compatibility syscall for 64-bit sys 1 /* 32-bit compatibility syscall for 64-bit systems
3 * 2 *
4 * Copyright (C) 2004-5 Red Hat, Inc. All Righ 3 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.c 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.
6 */ 10 */
7 11
8 #include <linux/syscalls.h> 12 #include <linux/syscalls.h>
9 #include <linux/keyctl.h> 13 #include <linux/keyctl.h>
10 #include <linux/compat.h> 14 #include <linux/compat.h>
11 #include <linux/slab.h> 15 #include <linux/slab.h>
12 #include "internal.h" 16 #include "internal.h"
13 17
14 /* 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 static 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 /*
15 * The key control system call, 32-bit compati 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.
16 */ 58 */
17 COMPAT_SYSCALL_DEFINE5(keyctl, u32, option, 59 COMPAT_SYSCALL_DEFINE5(keyctl, u32, option,
18 u32, arg2, u32, arg3, u 60 u32, arg2, u32, arg3, u32, arg4, u32, arg5)
19 { 61 {
20 switch (option) { 62 switch (option) {
21 case KEYCTL_GET_KEYRING_ID: 63 case KEYCTL_GET_KEYRING_ID:
22 return keyctl_get_keyring_ID(a 64 return keyctl_get_keyring_ID(arg2, arg3);
23 65
24 case KEYCTL_JOIN_SESSION_KEYRING: 66 case KEYCTL_JOIN_SESSION_KEYRING:
25 return keyctl_join_session_key 67 return keyctl_join_session_keyring(compat_ptr(arg2));
26 68
27 case KEYCTL_UPDATE: 69 case KEYCTL_UPDATE:
28 return keyctl_update_key(arg2, 70 return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
29 71
30 case KEYCTL_REVOKE: 72 case KEYCTL_REVOKE:
31 return keyctl_revoke_key(arg2) 73 return keyctl_revoke_key(arg2);
32 74
33 case KEYCTL_DESCRIBE: 75 case KEYCTL_DESCRIBE:
34 return keyctl_describe_key(arg 76 return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
35 77
36 case KEYCTL_CLEAR: 78 case KEYCTL_CLEAR:
37 return keyctl_keyring_clear(ar 79 return keyctl_keyring_clear(arg2);
38 80
39 case KEYCTL_LINK: 81 case KEYCTL_LINK:
40 return keyctl_keyring_link(arg 82 return keyctl_keyring_link(arg2, arg3);
41 83
42 case KEYCTL_UNLINK: 84 case KEYCTL_UNLINK:
43 return keyctl_keyring_unlink(a 85 return keyctl_keyring_unlink(arg2, arg3);
44 86
45 case KEYCTL_SEARCH: 87 case KEYCTL_SEARCH:
46 return keyctl_keyring_search(a 88 return keyctl_keyring_search(arg2, compat_ptr(arg3),
47 c 89 compat_ptr(arg4), arg5);
48 90
49 case KEYCTL_READ: 91 case KEYCTL_READ:
50 return keyctl_read_key(arg2, c 92 return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
51 93
52 case KEYCTL_CHOWN: 94 case KEYCTL_CHOWN:
53 return keyctl_chown_key(arg2, 95 return keyctl_chown_key(arg2, arg3, arg4);
54 96
55 case KEYCTL_SETPERM: 97 case KEYCTL_SETPERM:
56 return keyctl_setperm_key(arg2 98 return keyctl_setperm_key(arg2, arg3);
57 99
58 case KEYCTL_INSTANTIATE: 100 case KEYCTL_INSTANTIATE:
59 return keyctl_instantiate_key( 101 return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
60 102 arg5);
61 103
62 case KEYCTL_NEGATE: 104 case KEYCTL_NEGATE:
63 return keyctl_negate_key(arg2, 105 return keyctl_negate_key(arg2, arg3, arg4);
64 106
65 case KEYCTL_SET_REQKEY_KEYRING: 107 case KEYCTL_SET_REQKEY_KEYRING:
66 return keyctl_set_reqkey_keyri 108 return keyctl_set_reqkey_keyring(arg2);
67 109
68 case KEYCTL_SET_TIMEOUT: 110 case KEYCTL_SET_TIMEOUT:
69 return keyctl_set_timeout(arg2 111 return keyctl_set_timeout(arg2, arg3);
70 112
71 case KEYCTL_ASSUME_AUTHORITY: 113 case KEYCTL_ASSUME_AUTHORITY:
72 return keyctl_assume_authority 114 return keyctl_assume_authority(arg2);
73 115
74 case KEYCTL_GET_SECURITY: 116 case KEYCTL_GET_SECURITY:
75 return keyctl_get_security(arg 117 return keyctl_get_security(arg2, compat_ptr(arg3), arg4);
76 118
77 case KEYCTL_SESSION_TO_PARENT: 119 case KEYCTL_SESSION_TO_PARENT:
78 return keyctl_session_to_paren 120 return keyctl_session_to_parent();
79 121
80 case KEYCTL_REJECT: 122 case KEYCTL_REJECT:
81 return keyctl_reject_key(arg2, 123 return keyctl_reject_key(arg2, arg3, arg4, arg5);
82 124
83 case KEYCTL_INSTANTIATE_IOV: 125 case KEYCTL_INSTANTIATE_IOV:
84 return keyctl_instantiate_key_ !! 126 return compat_keyctl_instantiate_key_iov(
85 !! 127 arg2, compat_ptr(arg3), arg4, arg5);
86 128
87 case KEYCTL_INVALIDATE: 129 case KEYCTL_INVALIDATE:
88 return keyctl_invalidate_key(a 130 return keyctl_invalidate_key(arg2);
89 131
90 case KEYCTL_GET_PERSISTENT: 132 case KEYCTL_GET_PERSISTENT:
91 return keyctl_get_persistent(a 133 return keyctl_get_persistent(arg2, arg3);
92 134
93 case KEYCTL_DH_COMPUTE: 135 case KEYCTL_DH_COMPUTE:
94 return compat_keyctl_dh_comput !! 136 return keyctl_dh_compute(compat_ptr(arg2), compat_ptr(arg3),
95 !! 137 arg4, compat_ptr(arg5));
96 <<
97 <<
98 case KEYCTL_RESTRICT_KEYRING: <<
99 return keyctl_restrict_keyring <<
100 <<
101 <<
102 case KEYCTL_PKEY_QUERY: <<
103 if (arg3 != 0) <<
104 return -EINVAL; <<
105 return keyctl_pkey_query(arg2, <<
106 compa <<
107 compa <<
108 <<
109 case KEYCTL_PKEY_ENCRYPT: <<
110 case KEYCTL_PKEY_DECRYPT: <<
111 case KEYCTL_PKEY_SIGN: <<
112 return keyctl_pkey_e_d_s(optio <<
113 compa <<
114 compa <<
115 <<
116 case KEYCTL_PKEY_VERIFY: <<
117 return keyctl_pkey_verify(comp <<
118 comp <<
119 <<
120 case KEYCTL_MOVE: <<
121 return keyctl_keyring_move(arg <<
122 <<
123 case KEYCTL_CAPABILITIES: <<
124 return keyctl_capabilities(com <<
125 <<
126 case KEYCTL_WATCH_KEY: <<
127 return keyctl_watch_key(arg2, <<
128 138
129 default: 139 default:
130 return -EOPNOTSUPP; 140 return -EOPNOTSUPP;
131 } 141 }
132 } 142 }
133 143
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