124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/* internal.h: authentication token and access key management internal defs
|
|
*
|
|
* Copyright (C) 2003 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.
|
|
*/
|
|
|
|
#ifndef _INTERNAL_H
|
|
#define _INTERNAL_H
|
|
|
|
#include <linux/key.h>
|
|
#include <linux/key-ui.h>
|
|
|
|
extern struct key_type key_type_dead;
|
|
extern struct key_type key_type_user;
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* keep track of keys for a user
|
|
* - this needs to be separate to user_struct to avoid a refcount-loop
|
|
* (user_struct pins some keyrings which pin this struct)
|
|
* - this also keeps track of keys under request from userspace for this UID
|
|
*/
|
|
struct key_user {
|
|
struct rb_node node;
|
|
struct list_head consq; /* construction queue */
|
|
spinlock_t lock;
|
|
atomic_t usage; /* for accessing qnkeys & qnbytes */
|
|
atomic_t nkeys; /* number of keys */
|
|
atomic_t nikeys; /* number of instantiated keys */
|
|
uid_t uid;
|
|
int qnkeys; /* number of keys allocated to this user */
|
|
int qnbytes; /* number of bytes allocated to this user */
|
|
};
|
|
|
|
#define KEYQUOTA_MAX_KEYS 100
|
|
#define KEYQUOTA_MAX_BYTES 10000
|
|
#define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */
|
|
|
|
extern struct rb_root key_user_tree;
|
|
extern spinlock_t key_user_lock;
|
|
extern struct key_user root_key_user;
|
|
|
|
extern struct key_user *key_user_lookup(uid_t uid);
|
|
extern void key_user_put(struct key_user *user);
|
|
|
|
|
|
|
|
extern struct rb_root key_serial_tree;
|
|
extern spinlock_t key_serial_lock;
|
|
extern struct semaphore key_alloc_sem;
|
|
extern struct rw_semaphore key_construction_sem;
|
|
extern wait_queue_head_t request_key_conswq;
|
|
|
|
|
|
extern void keyring_publish_name(struct key *keyring);
|
|
|
|
extern int __key_link(struct key *keyring, struct key *key);
|
|
|
|
extern struct key *__keyring_search_one(struct key *keyring,
|
|
const struct key_type *type,
|
|
const char *description,
|
|
key_perm_t perm);
|
|
|
|
typedef int (*key_match_func_t)(const struct key *, const void *);
|
|
|
|
extern struct key *keyring_search_aux(struct key *keyring,
|
|
struct key_type *type,
|
|
const void *description,
|
|
key_match_func_t match);
|
|
|
|
extern struct key *search_process_keyrings_aux(struct key_type *type,
|
|
const void *description,
|
|
key_match_func_t match);
|
|
|
|
extern struct key *find_keyring_by_name(const char *name, key_serial_t bound);
|
|
|
|
extern int install_thread_keyring(struct task_struct *tsk);
|
|
|
|
/*
|
|
* keyctl functions
|
|
*/
|
|
extern long keyctl_get_keyring_ID(key_serial_t, int);
|
|
extern long keyctl_join_session_keyring(const char __user *);
|
|
extern long keyctl_update_key(key_serial_t, const void __user *, size_t);
|
|
extern long keyctl_revoke_key(key_serial_t);
|
|
extern long keyctl_keyring_clear(key_serial_t);
|
|
extern long keyctl_keyring_link(key_serial_t, key_serial_t);
|
|
extern long keyctl_keyring_unlink(key_serial_t, key_serial_t);
|
|
extern long keyctl_describe_key(key_serial_t, char __user *, size_t);
|
|
extern long keyctl_keyring_search(key_serial_t, const char __user *,
|
|
const char __user *, key_serial_t);
|
|
extern long keyctl_read_key(key_serial_t, char __user *, size_t);
|
|
extern long keyctl_chown_key(key_serial_t, uid_t, gid_t);
|
|
extern long keyctl_setperm_key(key_serial_t, key_perm_t);
|
|
extern long keyctl_instantiate_key(key_serial_t, const void __user *,
|
|
size_t, key_serial_t);
|
|
extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t);
|
|
|
|
|
|
/*
|
|
* debugging key validation
|
|
*/
|
|
#ifdef KEY_DEBUGGING
|
|
extern void __key_check(const struct key *);
|
|
|
|
static inline void key_check(const struct key *key)
|
|
{
|
|
if (key && (IS_ERR(key) || key->magic != KEY_DEBUG_MAGIC))
|
|
__key_check(key);
|
|
}
|
|
|
|
#else
|
|
|
|
#define key_check(key) do {} while(0)
|
|
|
|
#endif
|
|
|
|
#endif /* _INTERNAL_H */
|