seg6_hmac.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 *  SR-IPv6 implementation
 4 *
 5 *  Author:
 6 *  David Lebrun <david.lebrun@uclouvain.be>
 7 */
 8
 9#ifndef _NET_SEG6_HMAC_H
10#define _NET_SEG6_HMAC_H
11
12#include <crypto/sha1.h>
13#include <crypto/sha2.h>
14#include <net/flow.h>
15#include <net/ip6_fib.h>
16#include <net/sock.h>
17#include <linux/ip.h>
18#include <linux/ipv6.h>
19#include <linux/route.h>
20#include <net/seg6.h>
21#include <linux/seg6_hmac.h>
22#include <linux/rhashtable-types.h>
23
24#define SEG6_HMAC_RING_SIZE		256
25
26struct seg6_hmac_info {
27	struct rhash_head node;
28	struct rcu_head rcu;
29
30	u32 hmackeyid;
31	/* The raw key, kept only so it can be returned back to userspace */
32	char secret[SEG6_HMAC_SECRET_LEN];
33	u8 slen;
34	u8 alg_id;
35	/* The prepared key, which the calculations actually use */
36	union {
37		struct hmac_sha1_key sha1;
38		struct hmac_sha256_key sha256;
39	} key;
40};
41
42extern int seg6_hmac_compute(struct seg6_hmac_info *hinfo,
43			     struct ipv6_sr_hdr *hdr, struct in6_addr *saddr,
44			     u8 *output);
45extern struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key);
46extern int seg6_hmac_info_add(struct net *net, u32 key,
47			      struct seg6_hmac_info *hinfo);
48extern int seg6_hmac_info_del(struct net *net, u32 key);
49extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
50			  struct ipv6_sr_hdr *srh);
51extern bool seg6_hmac_validate_skb(struct sk_buff *skb);
52#ifdef CONFIG_IPV6_SEG6_HMAC
53extern int seg6_hmac_net_init(struct net *net);
54extern void seg6_hmac_net_exit(struct net *net);
55#else
56static inline int seg6_hmac_net_init(struct net *net) { return 0; }
57static inline void seg6_hmac_net_exit(struct net *net) {}
58#endif
59
60#endif