[IPSEC]: Use HMAC template and hash interface
This patch converts IPsec to use the new HMAC template. The names of
existing simple digest algorithms may still be used to refer to their
HMAC composites.
The same structure can be used by other MACs such as AES-XCBC-MAC.
This patch also switches from the digest interface to hash.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ah.h b/include/net/ah.h
index 8e27c9b..8f257c1 100644
--- a/include/net/ah.h
+++ b/include/net/ah.h
@@ -15,22 +15,29 @@
int icv_full_len;
int icv_trunc_len;
- void (*icv)(struct ah_data*,
- struct sk_buff *skb, u8 *icv);
-
- struct crypto_tfm *tfm;
+ struct crypto_hash *tfm;
};
-static inline void
-ah_hmac_digest(struct ah_data *ahp, struct sk_buff *skb, u8 *auth_data)
+static inline int ah_mac_digest(struct ah_data *ahp, struct sk_buff *skb,
+ u8 *auth_data)
{
- struct crypto_tfm *tfm = ahp->tfm;
+ struct hash_desc desc;
+ int err;
+
+ desc.tfm = ahp->tfm;
+ desc.flags = 0;
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);
+ 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;
}
#endif