1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* RxRPC security handling
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/module.h>
10 #include <linux/skbuff.h>
11 #include <linux/udp.h>
12 #include <linux/crypto.h>
14 #include <net/af_rxrpc.h>
15 #include <keys/rxrpc-type.h>
16 #include "ar-internal.h"
18 static const struct rxrpc_security *rxrpc_security_types[] = {
19 [RXRPC_SECURITY_NONE] = &rxrpc_no_security,
21 [RXRPC_SECURITY_RXKAD] = &rxkad,
25 int __init rxrpc_init_security(void)
29 for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) {
30 if (rxrpc_security_types[i]) {
31 ret = rxrpc_security_types[i]->init();
40 for (i--; i >= 0; i--)
41 if (rxrpc_security_types[i])
42 rxrpc_security_types[i]->exit();
46 void rxrpc_exit_security(void)
50 for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++)
51 if (rxrpc_security_types[i])
52 rxrpc_security_types[i]->exit();
56 * look up an rxrpc security module
58 static const struct rxrpc_security *rxrpc_security_lookup(u8 security_index)
60 if (security_index >= ARRAY_SIZE(rxrpc_security_types))
62 return rxrpc_security_types[security_index];
66 * initialise the security on a client connection
68 int rxrpc_init_client_conn_security(struct rxrpc_connection *conn)
70 const struct rxrpc_security *sec;
71 struct rxrpc_key_token *token;
72 struct key *key = conn->params.key;
75 _enter("{%d},{%x}", conn->debug_id, key_serial(key));
80 ret = key_validate(key);
84 token = key->payload.data[0];
88 sec = rxrpc_security_lookup(token->security_index);
93 ret = conn->security->init_connection_security(conn);
95 conn->security = &rxrpc_no_security;
104 * initialise the security on a server connection
106 int rxrpc_init_server_conn_security(struct rxrpc_connection *conn)
108 const struct rxrpc_security *sec;
109 struct rxrpc_local *local = conn->params.local;
110 struct rxrpc_sock *rx;
113 char kdesc[5 + 1 + 3 + 1];
117 sprintf(kdesc, "%u:%u", conn->service_id, conn->security_ix);
119 sec = rxrpc_security_lookup(conn->security_ix);
121 _leave(" = -ENOKEY [lookup]");
125 /* find the service */
126 read_lock(&local->services_lock);
127 rx = rcu_dereference_protected(local->service,
128 lockdep_is_held(&local->services_lock));
129 if (rx && (rx->srx.srx_service == conn->service_id ||
130 rx->second_service == conn->service_id))
133 /* the service appears to have died */
134 read_unlock(&local->services_lock);
135 _leave(" = -ENOENT");
139 if (!rx->securities) {
140 read_unlock(&local->services_lock);
141 _leave(" = -ENOKEY");
145 /* look through the service's keyring */
146 kref = keyring_search(make_key_ref(rx->securities, 1UL),
147 &key_type_rxrpc_s, kdesc, true);
149 read_unlock(&local->services_lock);
150 _leave(" = %ld [search]", PTR_ERR(kref));
151 return PTR_ERR(kref);
154 key = key_ref_to_ptr(kref);
155 read_unlock(&local->services_lock);
157 conn->server_key = key;
158 conn->security = sec;