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
none_init_connection_security(struct rxrpc_connection * conn,struct rxrpc_key_token * token)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 */
none_how_much_data(struct rxrpc_call * call,size_t remain,size_t * _buf_size,size_t * _data_size,size_t * _offset)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
none_secure_packet(struct rxrpc_call * call,struct sk_buff * skb,size_t data_size)28 static int none_secure_packet(struct rxrpc_call *call, struct sk_buff *skb,
29 size_t data_size)
30 {
31 return 0;
32 }
33
none_verify_packet(struct rxrpc_call * call,struct sk_buff * skb,unsigned int offset,unsigned int len,rxrpc_seq_t seq,u16 expected_cksum)34 static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb,
35 unsigned int offset, unsigned int len,
36 rxrpc_seq_t seq, u16 expected_cksum)
37 {
38 return 0;
39 }
40
none_free_call_crypto(struct rxrpc_call * call)41 static void none_free_call_crypto(struct rxrpc_call *call)
42 {
43 }
44
none_locate_data(struct rxrpc_call * call,struct sk_buff * skb,unsigned int * _offset,unsigned int * _len)45 static void none_locate_data(struct rxrpc_call *call, struct sk_buff *skb,
46 unsigned int *_offset, unsigned int *_len)
47 {
48 }
49
none_respond_to_challenge(struct rxrpc_connection * conn,struct sk_buff * skb,u32 * _abort_code)50 static int none_respond_to_challenge(struct rxrpc_connection *conn,
51 struct sk_buff *skb,
52 u32 *_abort_code)
53 {
54 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
55
56 trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
57 tracepoint_string("chall_none"));
58 return -EPROTO;
59 }
60
none_verify_response(struct rxrpc_connection * conn,struct sk_buff * skb,u32 * _abort_code)61 static int none_verify_response(struct rxrpc_connection *conn,
62 struct sk_buff *skb,
63 u32 *_abort_code)
64 {
65 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
66
67 trace_rxrpc_rx_eproto(NULL, sp->hdr.serial,
68 tracepoint_string("resp_none"));
69 return -EPROTO;
70 }
71
none_clear(struct rxrpc_connection * conn)72 static void none_clear(struct rxrpc_connection *conn)
73 {
74 }
75
none_init(void)76 static int none_init(void)
77 {
78 return 0;
79 }
80
none_exit(void)81 static void none_exit(void)
82 {
83 }
84
85 /*
86 * RxRPC Kerberos-based security
87 */
88 const struct rxrpc_security rxrpc_no_security = {
89 .name = "none",
90 .security_index = RXRPC_SECURITY_NONE,
91 .init = none_init,
92 .exit = none_exit,
93 .init_connection_security = none_init_connection_security,
94 .free_call_crypto = none_free_call_crypto,
95 .how_much_data = none_how_much_data,
96 .secure_packet = none_secure_packet,
97 .verify_packet = none_verify_packet,
98 .locate_data = none_locate_data,
99 .respond_to_challenge = none_respond_to_challenge,
100 .verify_response = none_verify_response,
101 .clear = none_clear,
102 };
103