mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
bf355b8d2c
This patch adds the necessary functions to compute and check the HMAC signature of an SR-enabled packet. Two HMAC algorithms are supported: hmac(sha1) and hmac(sha256). In order to avoid dynamic memory allocation for each HMAC computation, a per-cpu ring buffer is allocated for this purpose. A new per-interface sysctl called seg6_require_hmac is added, allowing a user-defined policy for processing HMAC-signed SR-enabled packets. A value of -1 means that the HMAC field will always be ignored. A value of 0 means that if an HMAC field is present, its validity will be enforced (the packet is dropped is the signature is incorrect). Finally, a value of 1 means that any SR-enabled packet that does not contain an HMAC signature or whose signature is incorrect will be dropped. Signed-off-by: David Lebrun <david.lebrun@uclouvain.be> Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
|
|
* SR-IPv6 implementation
|
|
*
|
|
* Author:
|
|
* David Lebrun <david.lebrun@uclouvain.be>
|
|
*
|
|
*
|
|
* 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 _NET_SEG6_HMAC_H
|
|
#define _NET_SEG6_HMAC_H
|
|
|
|
#include <net/flow.h>
|
|
#include <net/ip6_fib.h>
|
|
#include <net/sock.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/route.h>
|
|
#include <net/seg6.h>
|
|
#include <linux/seg6_hmac.h>
|
|
#include <linux/rhashtable.h>
|
|
|
|
#define SEG6_HMAC_MAX_DIGESTSIZE 160
|
|
#define SEG6_HMAC_RING_SIZE 256
|
|
|
|
struct seg6_hmac_info {
|
|
struct rhash_head node;
|
|
struct rcu_head rcu;
|
|
|
|
u32 hmackeyid;
|
|
char secret[SEG6_HMAC_SECRET_LEN];
|
|
u8 slen;
|
|
u8 alg_id;
|
|
};
|
|
|
|
struct seg6_hmac_algo {
|
|
u8 alg_id;
|
|
char name[64];
|
|
struct crypto_shash * __percpu *tfms;
|
|
struct shash_desc * __percpu *shashs;
|
|
};
|
|
|
|
extern int seg6_hmac_compute(struct seg6_hmac_info *hinfo,
|
|
struct ipv6_sr_hdr *hdr, struct in6_addr *saddr,
|
|
u8 *output);
|
|
extern struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key);
|
|
extern int seg6_hmac_info_add(struct net *net, u32 key,
|
|
struct seg6_hmac_info *hinfo);
|
|
extern int seg6_hmac_info_del(struct net *net, u32 key);
|
|
extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
|
|
struct ipv6_sr_hdr *srh);
|
|
extern bool seg6_hmac_validate_skb(struct sk_buff *skb);
|
|
extern int seg6_hmac_init(void);
|
|
extern void seg6_hmac_exit(void);
|
|
extern int seg6_hmac_net_init(struct net *net);
|
|
extern void seg6_hmac_net_exit(struct net *net);
|
|
|
|
#endif
|