- struct crypto_tfm *tfm = esp->auth.tfm;
- char *icv = esp->auth.work_icv;
-
- memset(auth_data, 0, esp->auth.icv_trunc_len);
- crypto_hmac_init(tfm, esp->auth.key, &esp->auth.key_len);
- skb_icv_walk(skb, tfm, offset, len, crypto_hmac_update);
- crypto_hmac_final(tfm, esp->auth.key, &esp->auth.key_len, icv);
- memcpy(auth_data, icv, esp->auth.icv_trunc_len);
+ struct hash_desc desc;
+ int err;
+
+ desc.tfm = esp->auth.tfm;
+ desc.flags = 0;
+
+ err = crypto_hash_init(&desc);
+ if (unlikely(err))
+ return err;
+ err = skb_icv_walk(skb, &desc, offset, len, crypto_hash_update);
+ if (unlikely(err))
+ return err;
+ return crypto_hash_final(&desc, esp->auth.work_icv);