- 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);
+ err = crypto_hash_init(&desc);
+ if (unlikely(err))
+ goto out;
+ err = skb_icv_walk(skb, &desc, 0, skb->len, crypto_hash_update);
+ if (unlikely(err))
+ goto out;
+ err = crypto_hash_final(&desc, ahp->work_icv);
+
+out:
+ return err;
+}
+
+struct ip_auth_hdr;
+
+static inline struct ip_auth_hdr *ip_auth_hdr(const struct sk_buff *skb)
+{
+ return (struct ip_auth_hdr *)skb_transport_header(skb);