You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
793 B
36 lines
793 B
20 years ago
|
#ifndef _NET_AH_H
|
||
|
|
#define _NET_AH_H
|
||
|
|
|
||
|
|
#include <net/xfrm.h>
|
||
|
|
|
||
|
|
/* This is the maximum truncated ICV length that we know of. */
|
||
|
|
#define MAX_AH_AUTH_LEN 12
|
||
|
|
|
||
|
|
struct ah_data
|
||
|
|
{
|
||
|
|
u8 *key;
|
||
|
|
int key_len;
|
||
|
|
u8 *work_icv;
|
||
|
|
int icv_full_len;
|
||
|
|
int icv_trunc_len;
|
||
|
|
|
||
|
|
void (*icv)(struct ah_data*,
|
||
|
|
struct sk_buff *skb, u8 *icv);
|
||
|
|
|
||
|
|
struct crypto_tfm *tfm;
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline void
|
||
|
|
ah_hmac_digest(struct ah_data *ahp, struct sk_buff *skb, u8 *auth_data)
|
||
|
|
{
|
||
|
|
struct crypto_tfm *tfm = ahp->tfm;
|
||
|
|
|
||
|
|
memset(auth_data, 0, ahp->icv_trunc_len);
|
||
|
|
crypto_hmac_init(tfm, ahp->key, &ahp->key_len);
|
||
|
|
skb_icv_walk(skb, tfm, 0, skb->len, crypto_hmac_update);
|
||
|
|
crypto_hmac_final(tfm, ahp->key, &ahp->key_len, ahp->work_icv);
|
||
|
|
memcpy(auth_data, ahp->work_icv, ahp->icv_trunc_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|