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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/net/esp.h
4 #include <linux/crypto.h>
6 #include <linux/scatterlist.h>
8 #define ESP_NUM_FAST_SG 4
12 struct scatterlist sgbuf
[ESP_NUM_FAST_SG
];
16 int padlen
; /* 0..255 */
17 /* ivlen is offset from enc_data, where encrypted data start.
18 * It is logically different of crypto_tfm_alg_ivsize(tfm).
19 * We assume that it is either zero (no ivec), or
20 * >= crypto_tfm_alg_ivsize(tfm). */
23 u8
*ivec
; /* ivec buffer */
24 struct crypto_blkcipher
*tfm
; /* crypto handle */
27 /* Integrity. It is active when icv_full_len != 0 */
32 struct crypto_hash
*tfm
;
36 extern void *pskb_put(struct sk_buff
*skb
, struct sk_buff
*tail
, int len
);
38 static inline int esp_mac_digest(struct esp_data
*esp
, struct sk_buff
*skb
,
41 struct hash_desc desc
;
44 desc
.tfm
= esp
->auth
.tfm
;
47 err
= crypto_hash_init(&desc
);
50 err
= skb_icv_walk(skb
, &desc
, offset
, len
, crypto_hash_update
);
53 return crypto_hash_final(&desc
, esp
->auth
.work_icv
);
58 static inline struct ip_esp_hdr
*ip_esp_hdr(const struct sk_buff
*skb
)
60 return (struct ip_esp_hdr
*)skb_transport_header(skb
);