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 | * Work out how much data we can put in an unsecured packet. |
19 | */ |
20 | static 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 | |
28 | static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) |
29 | { |
30 | return 0; |
31 | } |
32 | |
33 | static 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 | |
41 | static void none_free_call_crypto(struct rxrpc_call *call) |
42 | { |
43 | } |
44 | |
45 | static 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 | |
52 | static 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 | |
59 | static void none_clear(struct rxrpc_connection *conn) |
60 | { |
61 | } |
62 | |
63 | static int none_init(void) |
64 | { |
65 | return 0; |
66 | } |
67 | |
68 | static void none_exit(void) |
69 | { |
70 | } |
71 | |
72 | /* |
73 | * RxRPC Kerberos-based security |
74 | */ |
75 | const 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 | |