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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
973c9f4f | 2 | /* 32-bit compatibility syscall for 64-bit systems |
1da177e4 | 3 | * |
3e30148c | 4 | * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved. |
1da177e4 | 5 | * Written by David Howells (dhowells@redhat.com) |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 LT |
8 | #include <linux/syscalls.h> |
9 | #include <linux/keyctl.h> | |
10 | #include <linux/compat.h> | |
ee009e4a | 11 | #include <linux/slab.h> |
1da177e4 LT |
12 | #include "internal.h" |
13 | ||
ee009e4a DH |
14 | /* |
15 | * Instantiate a key with the specified compatibility multipart payload and | |
16 | * link the key into the destination keyring if one is given. | |
17 | * | |
18 | * The caller must have the appropriate instantiation permit set for this to | |
19 | * work (see keyctl_assume_authority). No other permissions are required. | |
20 | * | |
21 | * If successful, 0 will be returned. | |
22 | */ | |
423b9788 | 23 | static long compat_keyctl_instantiate_key_iov( |
ee009e4a DH |
24 | key_serial_t id, |
25 | const struct compat_iovec __user *_payload_iov, | |
26 | unsigned ioc, | |
27 | key_serial_t ringid) | |
28 | { | |
29 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; | |
b353a1f7 | 30 | struct iov_iter from; |
ee009e4a DH |
31 | long ret; |
32 | ||
b353a1f7 AV |
33 | if (!_payload_iov) |
34 | ioc = 0; | |
ee009e4a | 35 | |
b353a1f7 AV |
36 | ret = compat_import_iovec(WRITE, _payload_iov, ioc, |
37 | ARRAY_SIZE(iovstack), &iov, | |
38 | &from); | |
ee009e4a | 39 | if (ret < 0) |
b353a1f7 | 40 | return ret; |
ee009e4a | 41 | |
b353a1f7 AV |
42 | ret = keyctl_instantiate_key_common(id, &from, ringid); |
43 | kfree(iov); | |
ee009e4a | 44 | return ret; |
ee009e4a DH |
45 | } |
46 | ||
1da177e4 | 47 | /* |
973c9f4f DH |
48 | * The key control system call, 32-bit compatibility version for 64-bit archs |
49 | * | |
50 | * This should only be called if the 64-bit arch uses weird pointers in 32-bit | |
51 | * mode or doesn't guarantee that the top 32-bits of the argument registers on | |
52 | * taking a 32-bit syscall are zero. If you can, you should call sys_keyctl() | |
53 | * directly. | |
1da177e4 | 54 | */ |
875ec3da HC |
55 | COMPAT_SYSCALL_DEFINE5(keyctl, u32, option, |
56 | u32, arg2, u32, arg3, u32, arg4, u32, arg5) | |
1da177e4 LT |
57 | { |
58 | switch (option) { | |
59 | case KEYCTL_GET_KEYRING_ID: | |
60 | return keyctl_get_keyring_ID(arg2, arg3); | |
61 | ||
62 | case KEYCTL_JOIN_SESSION_KEYRING: | |
63 | return keyctl_join_session_keyring(compat_ptr(arg2)); | |
64 | ||
65 | case KEYCTL_UPDATE: | |
66 | return keyctl_update_key(arg2, compat_ptr(arg3), arg4); | |
67 | ||
68 | case KEYCTL_REVOKE: | |
69 | return keyctl_revoke_key(arg2); | |
70 | ||
71 | case KEYCTL_DESCRIBE: | |
72 | return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); | |
73 | ||
74 | case KEYCTL_CLEAR: | |
75 | return keyctl_keyring_clear(arg2); | |
76 | ||
77 | case KEYCTL_LINK: | |
78 | return keyctl_keyring_link(arg2, arg3); | |
79 | ||
80 | case KEYCTL_UNLINK: | |
81 | return keyctl_keyring_unlink(arg2, arg3); | |
82 | ||
83 | case KEYCTL_SEARCH: | |
84 | return keyctl_keyring_search(arg2, compat_ptr(arg3), | |
85 | compat_ptr(arg4), arg5); | |
86 | ||
87 | case KEYCTL_READ: | |
88 | return keyctl_read_key(arg2, compat_ptr(arg3), arg4); | |
89 | ||
90 | case KEYCTL_CHOWN: | |
91 | return keyctl_chown_key(arg2, arg3, arg4); | |
92 | ||
93 | case KEYCTL_SETPERM: | |
94 | return keyctl_setperm_key(arg2, arg3); | |
95 | ||
96 | case KEYCTL_INSTANTIATE: | |
97 | return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4, | |
98 | arg5); | |
99 | ||
100 | case KEYCTL_NEGATE: | |
101 | return keyctl_negate_key(arg2, arg3, arg4); | |
102 | ||
3e30148c DH |
103 | case KEYCTL_SET_REQKEY_KEYRING: |
104 | return keyctl_set_reqkey_keyring(arg2); | |
105 | ||
017679c4 DH |
106 | case KEYCTL_SET_TIMEOUT: |
107 | return keyctl_set_timeout(arg2, arg3); | |
108 | ||
b5f545c8 DH |
109 | case KEYCTL_ASSUME_AUTHORITY: |
110 | return keyctl_assume_authority(arg2); | |
111 | ||
70a5bb72 DH |
112 | case KEYCTL_GET_SECURITY: |
113 | return keyctl_get_security(arg2, compat_ptr(arg3), arg4); | |
114 | ||
ee18d64c DH |
115 | case KEYCTL_SESSION_TO_PARENT: |
116 | return keyctl_session_to_parent(); | |
117 | ||
fdd1b945 DH |
118 | case KEYCTL_REJECT: |
119 | return keyctl_reject_key(arg2, arg3, arg4, arg5); | |
120 | ||
ee009e4a DH |
121 | case KEYCTL_INSTANTIATE_IOV: |
122 | return compat_keyctl_instantiate_key_iov( | |
123 | arg2, compat_ptr(arg3), arg4, arg5); | |
124 | ||
fd75815f DH |
125 | case KEYCTL_INVALIDATE: |
126 | return keyctl_invalidate_key(arg2); | |
127 | ||
f36f8c75 DH |
128 | case KEYCTL_GET_PERSISTENT: |
129 | return keyctl_get_persistent(arg2, arg3); | |
130 | ||
ddbb4114 | 131 | case KEYCTL_DH_COMPUTE: |
f1c316a3 SM |
132 | return compat_keyctl_dh_compute(compat_ptr(arg2), |
133 | compat_ptr(arg3), | |
134 | arg4, compat_ptr(arg5)); | |
ddbb4114 | 135 | |
6563c91f MM |
136 | case KEYCTL_RESTRICT_KEYRING: |
137 | return keyctl_restrict_keyring(arg2, compat_ptr(arg3), | |
138 | compat_ptr(arg4)); | |
139 | ||
00d60fd3 DH |
140 | case KEYCTL_PKEY_QUERY: |
141 | if (arg3 != 0) | |
142 | return -EINVAL; | |
143 | return keyctl_pkey_query(arg2, | |
144 | compat_ptr(arg4), | |
145 | compat_ptr(arg5)); | |
146 | ||
147 | case KEYCTL_PKEY_ENCRYPT: | |
148 | case KEYCTL_PKEY_DECRYPT: | |
149 | case KEYCTL_PKEY_SIGN: | |
150 | return keyctl_pkey_e_d_s(option, | |
151 | compat_ptr(arg2), compat_ptr(arg3), | |
152 | compat_ptr(arg4), compat_ptr(arg5)); | |
153 | ||
154 | case KEYCTL_PKEY_VERIFY: | |
155 | return keyctl_pkey_verify(compat_ptr(arg2), compat_ptr(arg3), | |
156 | compat_ptr(arg4), compat_ptr(arg5)); | |
157 | ||
1da177e4 LT |
158 | default: |
159 | return -EOPNOTSUPP; | |
160 | } | |
a8b17ed0 | 161 | } |