2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
19 #include <vnet/ip/ip.h>
20 #include <vnet/ipsec/ipsec.h>
22 #include <openssl/hmac.h>
23 #include <openssl/rand.h>
24 #include <openssl/evp.h>
29 unsigned char nexthdr;
31 unsigned short reserved;
34 unsigned char auth_data[0];
39 typedef CLIB_PACKED (struct {
42 }) ip4_and_ah_header_t;
46 typedef CLIB_PACKED (struct {
49 }) ip6_and_ah_header_t;
53 ah_calc_icv_padding_len (u8 icv_size, int is_ipv6)
55 ASSERT (0 == is_ipv6 || 1 == is_ipv6);
56 const u8 req_multiple = 4 + 4 * is_ipv6; // 4 for ipv4, 8 for ipv6
57 const u8 total_size = sizeof (ah_header_t) + icv_size;
58 return (req_multiple - total_size % req_multiple) % req_multiple;
64 * fd.io coding-style-patch-verification: ON
67 * eval: (c-set-style "gnu")