114 lines
3.7 KiB
C
114 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/* SCTP kernel implementation
|
|
* (C) Copyright 2007 Hewlett-Packard Development Company, L.P.
|
|
*
|
|
* This file is part of the SCTP kernel implementation
|
|
*
|
|
* Please send any bug reports or fixes you make to the
|
|
* email address(es):
|
|
* lksctp developers <linux-sctp@vger.kernel.org>
|
|
*
|
|
* Written or modified by:
|
|
* Vlad Yasevich <vladislav.yasevich@hp.com>
|
|
*/
|
|
|
|
#ifndef __sctp_auth_h__
|
|
#define __sctp_auth_h__
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/refcount.h>
|
|
|
|
struct sctp_endpoint;
|
|
struct sctp_association;
|
|
struct sctp_authkey;
|
|
struct sctp_hmacalgo;
|
|
struct crypto_shash;
|
|
|
|
/*
|
|
* Define a generic struct that will hold all the info
|
|
* necessary for an HMAC transform
|
|
*/
|
|
struct sctp_hmac {
|
|
__u16 hmac_id; /* one of the above ids */
|
|
char *hmac_name; /* name for loading */
|
|
__u16 hmac_len; /* length of the signature */
|
|
};
|
|
|
|
/* This is generic structure that containst authentication bytes used
|
|
* as keying material. It's a what is referred to as byte-vector all
|
|
* over SCTP-AUTH
|
|
*/
|
|
struct sctp_auth_bytes {
|
|
refcount_t refcnt;
|
|
__u32 len;
|
|
__u8 data[];
|
|
};
|
|
|
|
/* Definition for a shared key, weather endpoint or association */
|
|
struct sctp_shared_key {
|
|
struct list_head key_list;
|
|
struct sctp_auth_bytes *key;
|
|
refcount_t refcnt;
|
|
__u16 key_id;
|
|
__u8 deactivated;
|
|
};
|
|
|
|
#define key_for_each(__key, __list_head) \
|
|
list_for_each_entry(__key, __list_head, key_list)
|
|
|
|
#define key_for_each_safe(__key, __tmp, __list_head) \
|
|
list_for_each_entry_safe(__key, __tmp, __list_head, key_list)
|
|
|
|
static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key)
|
|
{
|
|
if (!key)
|
|
return;
|
|
|
|
refcount_inc(&key->refcnt);
|
|
}
|
|
|
|
void sctp_auth_key_put(struct sctp_auth_bytes *key);
|
|
struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp);
|
|
void sctp_auth_destroy_keys(struct list_head *keys);
|
|
int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp);
|
|
struct sctp_shared_key *sctp_auth_get_shkey(
|
|
const struct sctp_association *asoc,
|
|
__u16 key_id);
|
|
int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep,
|
|
struct sctp_association *asoc,
|
|
gfp_t gfp);
|
|
int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp);
|
|
void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[]);
|
|
struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id);
|
|
struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc);
|
|
void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc,
|
|
struct sctp_hmac_algo_param *hmacs);
|
|
int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc,
|
|
__be16 hmac_id);
|
|
int sctp_auth_send_cid(enum sctp_cid chunk,
|
|
const struct sctp_association *asoc);
|
|
int sctp_auth_recv_cid(enum sctp_cid chunk,
|
|
const struct sctp_association *asoc);
|
|
void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
|
|
struct sk_buff *skb, struct sctp_auth_chunk *auth,
|
|
struct sctp_shared_key *ep_key, gfp_t gfp);
|
|
void sctp_auth_shkey_release(struct sctp_shared_key *sh_key);
|
|
void sctp_auth_shkey_hold(struct sctp_shared_key *sh_key);
|
|
|
|
/* API Helpers */
|
|
int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id);
|
|
int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
|
|
struct sctp_hmacalgo *hmacs);
|
|
int sctp_auth_set_key(struct sctp_endpoint *ep, struct sctp_association *asoc,
|
|
struct sctp_authkey *auth_key);
|
|
int sctp_auth_set_active_key(struct sctp_endpoint *ep,
|
|
struct sctp_association *asoc, __u16 key_id);
|
|
int sctp_auth_del_key_id(struct sctp_endpoint *ep,
|
|
struct sctp_association *asoc, __u16 key_id);
|
|
int sctp_auth_deact_key_id(struct sctp_endpoint *ep,
|
|
struct sctp_association *asoc, __u16 key_id);
|
|
int sctp_auth_init(struct sctp_endpoint *ep, gfp_t gfp);
|
|
void sctp_auth_free(struct sctp_endpoint *ep);
|
|
|
|
#endif
|