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
11 static int none_init_connection_security(struct rxrpc_connection *conn,
12 struct rxrpc_key_token *token)
13 {
14 return 0;
15 }
16
17 /*
18 * Allocate an appropriately sized buffer for the amount of data remaining.
19 */
20 static struct rxrpc_txbuf *none_alloc_txbuf(struct rxrpc_call *call, size_t remain, gfp_t gfp)
21 {
22 return rxrpc_alloc_data_txbuf(call, min_t(size_t, remain, RXRPC_JUMBO_DATALEN), 1, gfp);
23 }
24
25 static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
26 {
27 return 0;
28 }
29
30 static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb)
31 {
32 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
33
34 sp->flags |= RXRPC_RX_VERIFIED;
35 return 0;
36 }
37
38 static void none_free_call_crypto(struct rxrpc_call *call)
39 {
40 }
41
42 static int none_respond_to_challenge(struct rxrpc_connection *conn,
43 struct sk_buff *skb)
44 {
45 return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,
46 rxrpc_eproto_rxnull_challenge);
47 }
48
49 static int none_verify_response(struct rxrpc_connection *conn,
50 struct sk_buff *skb)
51 {
52 return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,
53 rxrpc_eproto_rxnull_response);
54 }
55
56 static void none_clear(struct rxrpc_connection *conn)
57 {
58 }
59
60 static int none_init(void)
61 {
62 return 0;
63 }
64
65 static void none_exit(void)
66 {
67 }
68
69 /*
70 * RxRPC Kerberos-based security
71 */
72 const struct rxrpc_security rxrpc_no_security = {
73 .name = "none",
74 .security_index = RXRPC_SECURITY_NONE,
75 .init = none_init,
76 .exit = none_exit,
77 .init_connection_security = none_init_connection_security,
78 .free_call_crypto = none_free_call_crypto,
79 .alloc_txbuf = none_alloc_txbuf,
80 .secure_packet = none_secure_packet,
81 .verify_packet = none_verify_packet,
82 .respond_to_challenge = none_respond_to_challenge,
83 .verify_response = none_verify_response,
84 .clear = none_clear,
85 };
86
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