1/* Null security operations.
 2 *
 3 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
 4 * Written by David Howells (dhowells@redhat.com)
 5 *
 6 * This program is free software; you can redistribute it and/or
 7 * modify it under the terms of the GNU General Public Licence
 8 * as published by the Free Software Foundation; either version
 9 * 2 of the Licence, or (at your option) any later version.
10 */
11
12#include <net/af_rxrpc.h>
13#include "ar-internal.h"
14
15static int none_init_connection_security(struct rxrpc_connection *conn)
16{
17	return 0;
18}
19
20static int none_prime_packet_security(struct rxrpc_connection *conn)
21{
22	return 0;
23}
24
25static int none_secure_packet(struct rxrpc_call *call,
26			      struct sk_buff *skb,
27			      size_t data_size,
28			      void *sechdr)
29{
30	return 0;
31}
32
33static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb,
34			      unsigned int offset, unsigned int len,
35			      rxrpc_seq_t seq, u16 expected_cksum)
36{
37	return 0;
38}
39
40static void none_locate_data(struct rxrpc_call *call, struct sk_buff *skb,
41			     unsigned int *_offset, unsigned int *_len)
42{
43}
44
45static int none_respond_to_challenge(struct rxrpc_connection *conn,
46				     struct sk_buff *skb,
47				     u32 *_abort_code)
48{
49	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
50
51	trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
52			      tracepoint_string("chall_none"));
53	return -EPROTO;
54}
55
56static int none_verify_response(struct rxrpc_connection *conn,
57				struct sk_buff *skb,
58				u32 *_abort_code)
59{
60	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
61
62	trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
63			      tracepoint_string("resp_none"));
64	return -EPROTO;
65}
66
67static void none_clear(struct rxrpc_connection *conn)
68{
69}
70
71static int none_init(void)
72{
73	return 0;
74}
75
76static void none_exit(void)
77{
78}
79
80/*
81 * RxRPC Kerberos-based security
82 */
83const struct rxrpc_security rxrpc_no_security = {
84	.name				= "none",
85	.security_index			= RXRPC_SECURITY_NONE,
86	.init				= none_init,
87	.exit				= none_exit,
88	.init_connection_security	= none_init_connection_security,
89	.prime_packet_security		= none_prime_packet_security,
90	.secure_packet			= none_secure_packet,
91	.verify_packet			= none_verify_packet,
92	.locate_data			= none_locate_data,
93	.respond_to_challenge		= none_respond_to_challenge,
94	.verify_response		= none_verify_response,
95	.clear				= none_clear,
96};