/* 32-bit compatibility syscall for 64-bit systems * * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/syscalls.h>#include <linux/keyctl.h>#include <linux/compat.h>#include <linux/slab.h>#include "internal.h" /* * Instantiate a key with the specified compatibility multipart payload and * link the key into the destination keyring if one is given. * * The caller must have the appropriate instantiation permit set for this to * work (see keyctl_assume_authority). No other permissions are required. * * If successful, 0 will be returned. */long compat_keyctl_instantiate_key_iov( key_serial_t id, const struct compat_iovec __user *_payload_iov, unsigned ioc, key_serial_t ringid){ struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; long ret; if (_payload_iov == 0 || ioc == 0) goto no_payload; ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc, ARRAY_SIZE(iovstack), iovstack, &iov); if (ret < 0) return ret; if (ret == 0) goto no_payload_free; ret = keyctl_instantiate_key_common(id, iov, ioc, ret, ringid); if (iov != iovstack) kfree(iov); return ret; no_payload_free: if (iov != iovstack) kfree(iov);no_payload: return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid);} /* * The key control system call, 32-bit compatibility version for 64-bit archs * * This should only be called if the 64-bit arch uses weird pointers in 32-bit * mode or doesn't guarantee that the top 32-bits of the argument registers on * taking a 32-bit syscall are zero. If you can, you should call sys_keyctl() * directly. */asmlinkage long compat_sys_keyctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5){ switch (option) { case KEYCTL_GET_KEYRING_ID: return keyctl_get_keyring_ID(arg2, arg3); case KEYCTL_JOIN_SESSION_KEYRING: return keyctl_join_session_keyring(compat_ptr(arg2)); case KEYCTL_UPDATE: return keyctl_update_key(arg2, compat_ptr(arg3), arg4); case KEYCTL_REVOKE: return keyctl_revoke_key(arg2); case KEYCTL_DESCRIBE: return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); case KEYCTL_CLEAR: return keyctl_keyring_clear(arg2); case KEYCTL_LINK: return keyctl_keyring_link(arg2, arg3); case KEYCTL_UNLINK: return keyctl_keyring_unlink(arg2, arg3); case KEYCTL_SEARCH: return keyctl_keyring_search(arg2, compat_ptr(arg3), compat_ptr(arg4), arg5); case KEYCTL_READ: return keyctl_read_key(arg2, compat_ptr(arg3), arg4); case KEYCTL_CHOWN: return keyctl_chown_key(arg2, arg3, arg4); case KEYCTL_SETPERM: return keyctl_setperm_key(arg2, arg3); case KEYCTL_INSTANTIATE: return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4, arg5); case KEYCTL_NEGATE: return keyctl_negate_key(arg2, arg3, arg4); case KEYCTL_SET_REQKEY_KEYRING: return keyctl_set_reqkey_keyring(arg2); case KEYCTL_SET_TIMEOUT: return keyctl_set_timeout(arg2, arg3); case KEYCTL_ASSUME_AUTHORITY: return keyctl_assume_authority(arg2); case KEYCTL_GET_SECURITY: return keyctl_get_security(arg2, compat_ptr(arg3), arg4); case KEYCTL_SESSION_TO_PARENT: return keyctl_session_to_parent(); case KEYCTL_REJECT: return keyctl_reject_key(arg2, arg3, arg4, arg5); case KEYCTL_INSTANTIATE_IOV: return compat_keyctl_instantiate_key_iov( arg2, compat_ptr(arg3), arg4, arg5); case KEYCTL_INVALIDATE: return keyctl_invalidate_key(arg2); default: return -EOPNOTSUPP; }}
/* 32-bit compatibility syscall for 64-bit systems
*
* Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/syscalls.h>
#include <linux/keyctl.h>
#include <linux/compat.h>
#include <linux/slab.h>
#include "internal.h"
/*
* Instantiate a key with the specified compatibility multipart payload and
* link the key into the destination keyring if one is given.
*
* The caller must have the appropriate instantiation permit set for this to
* work (see keyctl_assume_authority). No other permissions are required.
*
* If successful, 0 will be returned.
*/
long compat_keyctl_instantiate_key_iov(
key_serial_t id,
const struct compat_iovec __user *_payload_iov,
unsigned ioc,
key_serial_t ringid)
{
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
long ret;
if (_payload_iov == 0 || ioc == 0)
goto no_payload;
ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc,
ARRAY_SIZE(iovstack),
iovstack, &iov);
if (ret < 0)
return ret;
if (ret == 0)
goto no_payload_free;
ret = keyctl_instantiate_key_common(id, iov, ioc, ret, ringid);
if (iov != iovstack)
kfree(iov);
return ret;
no_payload_free:
if (iov != iovstack)
kfree(iov);
no_payload:
return keyctl_instantiate_key_common(id, NULL, 0, 0, ringid);
}
/*
* The key control system call, 32-bit compatibility version for 64-bit archs
*
* This should only be called if the 64-bit arch uses weird pointers in 32-bit
* mode or doesn't guarantee that the top 32-bits of the argument registers on
* taking a 32-bit syscall are zero. If you can, you should call sys_keyctl()
* directly.
*/
asmlinkage long compat_sys_keyctl(u32 option,
u32 arg2, u32 arg3, u32 arg4, u32 arg5)
{
switch (option) {
case KEYCTL_GET_KEYRING_ID:
return keyctl_get_keyring_ID(arg2, arg3);
case KEYCTL_JOIN_SESSION_KEYRING:
return keyctl_join_session_keyring(compat_ptr(arg2));
case KEYCTL_UPDATE:
return keyctl_update_key(arg2, compat_ptr(arg3), arg4);
case KEYCTL_REVOKE:
return keyctl_revoke_key(arg2);
case KEYCTL_DESCRIBE:
return keyctl_describe_key(arg2, compat_ptr(arg3), arg4);
case KEYCTL_CLEAR:
return keyctl_keyring_clear(arg2);
case KEYCTL_LINK:
return keyctl_keyring_link(arg2, arg3);
case KEYCTL_UNLINK:
return keyctl_keyring_unlink(arg2, arg3);
case KEYCTL_SEARCH:
return keyctl_keyring_search(arg2, compat_ptr(arg3),
compat_ptr(arg4), arg5);
case KEYCTL_READ:
return keyctl_read_key(arg2, compat_ptr(arg3), arg4);
case KEYCTL_CHOWN:
return keyctl_chown_key(arg2, arg3, arg4);
case KEYCTL_SETPERM:
return keyctl_setperm_key(arg2, arg3);
case KEYCTL_INSTANTIATE:
return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4,
arg5);
case KEYCTL_NEGATE:
return keyctl_negate_key(arg2, arg3, arg4);
case KEYCTL_SET_REQKEY_KEYRING:
return keyctl_set_reqkey_keyring(arg2);
case KEYCTL_SET_TIMEOUT:
return keyctl_set_timeout(arg2, arg3);
case KEYCTL_ASSUME_AUTHORITY:
return keyctl_assume_authority(arg2);
case KEYCTL_GET_SECURITY:
return keyctl_get_security(arg2, compat_ptr(arg3), arg4);
case KEYCTL_SESSION_TO_PARENT:
return keyctl_session_to_parent();
case KEYCTL_REJECT:
return keyctl_reject_key(arg2, arg3, arg4, arg5);
case KEYCTL_INSTANTIATE_IOV:
return compat_keyctl_instantiate_key_iov(
arg2, compat_ptr(arg3), arg4, arg5);
case KEYCTL_INVALIDATE:
return keyctl_invalidate_key(arg2);
default:
return -EOPNOTSUPP;
}
}