4eb582cf1f
Add a /proc/<pid>/attr/keycreate entry that stores the appropriate context for newly-created keys. Modify the selinux_key_alloc hook to make use of the new entry. Update the flask headers to include a new "setkeycreate" permission for processes. Update the flask headers to include a new "create" permission for keys. Use the create permission to restrict which SIDs each task can assign to newly-created keys. Add a new parameter to the security hook "security_key_alloc" to indicate whether it is being invoked by the kernel, or from userspace. If it is being invoked by the kernel, the security hook should never fail. Update the documentation to reflect these changes. Signed-off-by: Michael LeMay <mdlemay@epoch.ncsc.mil> Signed-off-by: James Morris <jmorris@namei.org> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/*
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* NSA Security-Enhanced Linux (SELinux) security module
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*
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* This file contains the SELinux security data structures for kernel objects.
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*
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* Author(s): Stephen Smalley, <sds@epoch.ncsc.mil>
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* Chris Vance, <cvance@nai.com>
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* Wayne Salamon, <wsalamon@nai.com>
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* James Morris <jmorris@redhat.com>
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*
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* Copyright (C) 2001,2002 Networks Associates Technology, Inc.
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* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2,
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* as published by the Free Software Foundation.
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*/
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#ifndef _SELINUX_OBJSEC_H_
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#define _SELINUX_OBJSEC_H_
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#include <linux/list.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/binfmts.h>
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#include <linux/in.h>
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#include "flask.h"
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#include "avc.h"
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struct task_security_struct {
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struct task_struct *task; /* back pointer to task object */
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u32 osid; /* SID prior to last execve */
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u32 sid; /* current SID */
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u32 exec_sid; /* exec SID */
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u32 create_sid; /* fscreate SID */
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u32 keycreate_sid; /* keycreate SID */
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u32 ptrace_sid; /* SID of ptrace parent */
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};
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struct inode_security_struct {
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struct inode *inode; /* back pointer to inode object */
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struct list_head list; /* list of inode_security_struct */
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u32 task_sid; /* SID of creating task */
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u32 sid; /* SID of this object */
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u16 sclass; /* security class of this object */
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unsigned char initialized; /* initialization flag */
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struct semaphore sem;
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unsigned char inherit; /* inherit SID from parent entry */
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};
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struct file_security_struct {
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struct file *file; /* back pointer to file object */
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u32 sid; /* SID of open file description */
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u32 fown_sid; /* SID of file owner (for SIGIO) */
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};
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struct superblock_security_struct {
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struct super_block *sb; /* back pointer to sb object */
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struct list_head list; /* list of superblock_security_struct */
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u32 sid; /* SID of file system */
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u32 def_sid; /* default SID for labeling */
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unsigned int behavior; /* labeling behavior */
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unsigned char initialized; /* initialization flag */
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unsigned char proc; /* proc fs */
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struct semaphore sem;
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struct list_head isec_head;
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spinlock_t isec_lock;
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};
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struct msg_security_struct {
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struct msg_msg *msg; /* back pointer */
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u32 sid; /* SID of message */
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};
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struct ipc_security_struct {
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struct kern_ipc_perm *ipc_perm; /* back pointer */
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u16 sclass; /* security class of this object */
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u32 sid; /* SID of IPC resource */
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};
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struct bprm_security_struct {
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struct linux_binprm *bprm; /* back pointer to bprm object */
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u32 sid; /* SID for transformed process */
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unsigned char set;
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/*
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* unsafe is used to share failure information from bprm_apply_creds()
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* to bprm_post_apply_creds().
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*/
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char unsafe;
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};
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struct netif_security_struct {
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struct net_device *dev; /* back pointer */
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u32 if_sid; /* SID for this interface */
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u32 msg_sid; /* default SID for messages received on this interface */
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};
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struct sk_security_struct {
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struct sock *sk; /* back pointer to sk object */
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u32 peer_sid; /* SID of peer */
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};
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struct key_security_struct {
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struct key *obj; /* back pointer */
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u32 sid; /* SID of key */
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};
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extern unsigned int selinux_checkreqprot;
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#endif /* _SELINUX_OBJSEC_H_ */
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