1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Null security operations.
3 *
4 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8#include <net/af_rxrpc.h>
9#include "ar-internal.h"
10
11static int none_init_connection_security(struct rxrpc_connection *conn,
12 struct rxrpc_key_token *token)
13{
14 return 0;
15}
16
17/*
18 * Work out how much data we can put in an unsecured packet.
19 */
20static int none_how_much_data(struct rxrpc_call *call, size_t remain,
21 size_t *_buf_size, size_t *_data_size, size_t *_offset)
22{
23 *_buf_size = *_data_size = min_t(size_t, remain, RXRPC_JUMBO_DATALEN);
24 *_offset = 0;
25 return 0;
26}
27
28static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
29{
30 return 0;
31}
32
33static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb)
34{
35 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
36
37 sp->flags |= RXRPC_RX_VERIFIED;
38 return 0;
39}
40
41static void none_free_call_crypto(struct rxrpc_call *call)
42{
43}
44
45static int none_respond_to_challenge(struct rxrpc_connection *conn,
46 struct sk_buff *skb)
47{
48 return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, err: -EPROTO,
49 why: rxrpc_eproto_rxnull_challenge);
50}
51
52static int none_verify_response(struct rxrpc_connection *conn,
53 struct sk_buff *skb)
54{
55 return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, err: -EPROTO,
56 why: rxrpc_eproto_rxnull_response);
57}
58
59static void none_clear(struct rxrpc_connection *conn)
60{
61}
62
63static int none_init(void)
64{
65 return 0;
66}
67
68static void none_exit(void)
69{
70}
71
72/*
73 * RxRPC Kerberos-based security
74 */
75const struct rxrpc_security rxrpc_no_security = {
76 .name = "none",
77 .security_index = RXRPC_SECURITY_NONE,
78 .init = none_init,
79 .exit = none_exit,
80 .init_connection_security = none_init_connection_security,
81 .free_call_crypto = none_free_call_crypto,
82 .how_much_data = none_how_much_data,
83 .secure_packet = none_secure_packet,
84 .verify_packet = none_verify_packet,
85 .respond_to_challenge = none_respond_to_challenge,
86 .verify_response = none_verify_response,
87 .clear = none_clear,
88};
89

source code of linux/net/rxrpc/insecure.c