- u8 *digest = NULL;
- {
- digest = vlib_buffer_get_current (i_b0) + ip_hdr_size + icv_size;
- memset (digest, 0, icv_size);
- }
-
- hmac_calc (sa0->integ_alg, sa0->integ_key,
- sa0->integ_key_len,
- (u8 *) vlib_buffer_get_current (i_b0),
- i_b0->current_length, sig, sa0->use_esn, sa0->seq_hi);
-
- memcpy (digest, (char *) &sig[0], 12);
-
+ u8 *digest =
+ vlib_buffer_get_current (i_b0) + ip_hdr_size +
+ sizeof (ah_header_t);
+ memset (digest, 0, icv_size);
+
+ unsigned size = hmac_calc (sa0->integ_alg, sa0->integ_key,
+ sa0->integ_key_len,
+ vlib_buffer_get_current (i_b0),
+ i_b0->current_length, sig, sa0->use_esn,
+ sa0->seq_hi);
+
+ memcpy (digest, sig, size);