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/* Definitions for key type implementations
*
* Copyright (C) 2007 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 Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef _LINUX_KEY_TYPE_H
#define _LINUX_KEY_TYPE_H
#include <linux/key.h>
#ifdef CONFIG_KEYS
struct key_construction {
struct key *key;
struct key *authkey;
};
typedef int (*request_key_actor_t)(struct key_construction *key,
const char *op, void *aux);
struct key_type {
const char *name;
size_t def_datalen;
int (*vet_description)(const char *description);
int (*instantiate)(struct key *key, const void *data, size_t datalen);
int (*update)(struct key *key, const void *data, size_t datalen);
int (*match)(const struct key *key, const void *desc);
void (*revoke)(struct key *key);
void (*destroy)(struct key *key);
void (*describe)(const struct key *key, struct seq_file *p);
long (*read)(const struct key *key, char __user *buffer, size_t buflen);
request_key_actor_t request_key;
struct list_head link;
struct lock_class_key lock_class;
};
extern struct key_type key_type_keyring;
extern int register_key_type(struct key_type *ktype);
extern void unregister_key_type(struct key_type *ktype);
extern int key_payload_reserve(struct key *key, size_t datalen);
extern int key_instantiate_and_link(struct key *key,
const void *data,
size_t datalen,
struct key *keyring,
struct key *instkey);
extern int key_reject_and_link(struct key *key,
unsigned timeout,
unsigned error,
struct key *keyring,
struct key *instkey);
extern void complete_request_key(struct key_construction *cons, int error);
static inline int key_negate_and_link(struct key *key,
unsigned timeout,
struct key *keyring,
struct key *instkey)
{
return key_reject_and_link(key, timeout, ENOKEY, keyring, instkey);
}
#endif
#endif
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