1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 32-bit compatibility syscall for 64-bit systems
4 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/syscalls.h>
9 #include <linux/keyctl.h>
10 #include <linux/compat.h>
11 #include <linux/slab.h>
15 * Instantiate a key with the specified compatibility multipart payload and
16 * link the key into the destination keyring if one is given.
18 * The caller must have the appropriate instantiation permit set for this to
19 * work (see keyctl_assume_authority). No other permissions are required.
21 * If successful, 0 will be returned.
23 static long compat_keyctl_instantiate_key_iov(
25 const struct compat_iovec __user *_payload_iov,
29 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
36 ret = compat_import_iovec(WRITE, _payload_iov, ioc,
37 ARRAY_SIZE(iovstack), &iov,
42 ret = keyctl_instantiate_key_common(id, &from, ringid);
48 * The key control system call, 32-bit compatibility version for 64-bit archs
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()
55 COMPAT_SYSCALL_DEFINE5(keyctl, u32, option,
56 u32, arg2, u32, arg3, u32, arg4, u32, arg5)
59 case KEYCTL_GET_KEYRING_ID:
60 return keyctl_get_keyring_ID(arg2, arg3);
62 case KEYCTL_JOIN_SESSION_KEYRING:
63 return keyctl_join_session_keyring(compat_ptr(arg2));
66 return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
69 return keyctl_revoke_key(arg2);
72 return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
75 return keyctl_keyring_clear(arg2);
78 return keyctl_keyring_link(arg2, arg3);
81 return keyctl_keyring_unlink(arg2, arg3);
84 return keyctl_keyring_search(arg2, compat_ptr(arg3),
85 compat_ptr(arg4), arg5);
88 return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
91 return keyctl_chown_key(arg2, arg3, arg4);
94 return keyctl_setperm_key(arg2, arg3);
96 case KEYCTL_INSTANTIATE:
97 return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
101 return keyctl_negate_key(arg2, arg3, arg4);
103 case KEYCTL_SET_REQKEY_KEYRING:
104 return keyctl_set_reqkey_keyring(arg2);
106 case KEYCTL_SET_TIMEOUT:
107 return keyctl_set_timeout(arg2, arg3);
109 case KEYCTL_ASSUME_AUTHORITY:
110 return keyctl_assume_authority(arg2);
112 case KEYCTL_GET_SECURITY:
113 return keyctl_get_security(arg2, compat_ptr(arg3), arg4);
115 case KEYCTL_SESSION_TO_PARENT:
116 return keyctl_session_to_parent();
119 return keyctl_reject_key(arg2, arg3, arg4, arg5);
121 case KEYCTL_INSTANTIATE_IOV:
122 return compat_keyctl_instantiate_key_iov(
123 arg2, compat_ptr(arg3), arg4, arg5);
125 case KEYCTL_INVALIDATE:
126 return keyctl_invalidate_key(arg2);
128 case KEYCTL_GET_PERSISTENT:
129 return keyctl_get_persistent(arg2, arg3);
131 case KEYCTL_DH_COMPUTE:
132 return compat_keyctl_dh_compute(compat_ptr(arg2),
134 arg4, compat_ptr(arg5));
136 case KEYCTL_RESTRICT_KEYRING:
137 return keyctl_restrict_keyring(arg2, compat_ptr(arg3),
140 case KEYCTL_PKEY_QUERY:
143 return keyctl_pkey_query(arg2,
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));
154 case KEYCTL_PKEY_VERIFY:
155 return keyctl_pkey_verify(compat_ptr(arg2), compat_ptr(arg3),
156 compat_ptr(arg4), compat_ptr(arg5));
159 return keyctl_keyring_move(arg2, arg3, arg4, arg5);
161 case KEYCTL_CAPABILITIES:
162 return keyctl_capabilities(compat_ptr(arg2), arg3);