]>
Commit | Line | Data |
---|---|---|
17926a79 DH |
1 | /* RxRPC security handling |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/net.h> | |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/udp.h> | |
16 | #include <linux/crypto.h> | |
17 | #include <net/sock.h> | |
18 | #include <net/af_rxrpc.h> | |
33941284 | 19 | #include <keys/rxrpc-type.h> |
17926a79 DH |
20 | #include "ar-internal.h" |
21 | ||
22 | static LIST_HEAD(rxrpc_security_methods); | |
23 | static DECLARE_RWSEM(rxrpc_security_sem); | |
24 | ||
648af7fc | 25 | static const struct rxrpc_security *rxrpc_security_types[] = { |
e0e4d82f | 26 | [RXRPC_SECURITY_NONE] = &rxrpc_no_security, |
648af7fc DH |
27 | #ifdef CONFIG_RXKAD |
28 | [RXRPC_SECURITY_RXKAD] = &rxkad, | |
29 | #endif | |
30 | }; | |
17926a79 | 31 | |
648af7fc | 32 | int __init rxrpc_init_security(void) |
17926a79 | 33 | { |
648af7fc | 34 | int i, ret; |
17926a79 | 35 | |
648af7fc DH |
36 | for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) { |
37 | if (rxrpc_security_types[i]) { | |
38 | ret = rxrpc_security_types[i]->init(); | |
39 | if (ret < 0) | |
40 | goto failed; | |
17926a79 DH |
41 | } |
42 | } | |
43 | ||
648af7fc DH |
44 | return 0; |
45 | ||
46 | failed: | |
47 | for (i--; i >= 0; i--) | |
48 | if (rxrpc_security_types[i]) | |
49 | rxrpc_security_types[i]->exit(); | |
50 | return ret; | |
17926a79 DH |
51 | } |
52 | ||
648af7fc | 53 | void rxrpc_exit_security(void) |
17926a79 | 54 | { |
648af7fc | 55 | int i; |
17926a79 | 56 | |
648af7fc DH |
57 | for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) |
58 | if (rxrpc_security_types[i]) | |
59 | rxrpc_security_types[i]->exit(); | |
17926a79 DH |
60 | } |
61 | ||
648af7fc DH |
62 | /* |
63 | * look up an rxrpc security module | |
17926a79 | 64 | */ |
648af7fc | 65 | static const struct rxrpc_security *rxrpc_security_lookup(u8 security_index) |
17926a79 | 66 | { |
648af7fc DH |
67 | if (security_index >= ARRAY_SIZE(rxrpc_security_types)) |
68 | return NULL; | |
69 | return rxrpc_security_types[security_index]; | |
17926a79 DH |
70 | } |
71 | ||
17926a79 DH |
72 | /* |
73 | * initialise the security on a client connection | |
74 | */ | |
75 | int rxrpc_init_client_conn_security(struct rxrpc_connection *conn) | |
76 | { | |
648af7fc | 77 | const struct rxrpc_security *sec; |
33941284 | 78 | struct rxrpc_key_token *token; |
19ffa01c | 79 | struct key *key = conn->params.key; |
17926a79 DH |
80 | int ret; |
81 | ||
82 | _enter("{%d},{%x}", conn->debug_id, key_serial(key)); | |
83 | ||
84 | if (!key) | |
85 | return 0; | |
86 | ||
87 | ret = key_validate(key); | |
88 | if (ret < 0) | |
89 | return ret; | |
90 | ||
146aa8b1 DH |
91 | token = key->payload.data[0]; |
92 | if (!token) | |
33941284 | 93 | return -EKEYREJECTED; |
33941284 DH |
94 | |
95 | sec = rxrpc_security_lookup(token->security_index); | |
17926a79 DH |
96 | if (!sec) |
97 | return -EKEYREJECTED; | |
98 | conn->security = sec; | |
99 | ||
100 | ret = conn->security->init_connection_security(conn); | |
101 | if (ret < 0) { | |
e0e4d82f | 102 | conn->security = &rxrpc_no_security; |
17926a79 DH |
103 | return ret; |
104 | } | |
105 | ||
106 | _leave(" = 0"); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | /* | |
111 | * initialise the security on a server connection | |
112 | */ | |
113 | int rxrpc_init_server_conn_security(struct rxrpc_connection *conn) | |
114 | { | |
648af7fc | 115 | const struct rxrpc_security *sec; |
85f32278 | 116 | struct rxrpc_local *local = conn->params.local; |
17926a79 DH |
117 | struct rxrpc_sock *rx; |
118 | struct key *key; | |
119 | key_ref_t kref; | |
b4f1342f | 120 | char kdesc[5 + 1 + 3 + 1]; |
17926a79 DH |
121 | |
122 | _enter(""); | |
123 | ||
19ffa01c | 124 | sprintf(kdesc, "%u:%u", conn->params.service_id, conn->security_ix); |
17926a79 DH |
125 | |
126 | sec = rxrpc_security_lookup(conn->security_ix); | |
127 | if (!sec) { | |
128 | _leave(" = -ENOKEY [lookup]"); | |
129 | return -ENOKEY; | |
130 | } | |
131 | ||
132 | /* find the service */ | |
248f219c | 133 | read_lock(&local->services_lock); |
1e9e5c95 DH |
134 | rx = rcu_dereference_protected(local->service, |
135 | lockdep_is_held(&local->services_lock)); | |
136 | if (rx && rx->srx.srx_service == conn->params.service_id) | |
137 | goto found_service; | |
17926a79 DH |
138 | |
139 | /* the service appears to have died */ | |
248f219c | 140 | read_unlock(&local->services_lock); |
17926a79 DH |
141 | _leave(" = -ENOENT"); |
142 | return -ENOENT; | |
143 | ||
144 | found_service: | |
145 | if (!rx->securities) { | |
248f219c | 146 | read_unlock(&local->services_lock); |
17926a79 DH |
147 | _leave(" = -ENOKEY"); |
148 | return -ENOKEY; | |
149 | } | |
150 | ||
151 | /* look through the service's keyring */ | |
152 | kref = keyring_search(make_key_ref(rx->securities, 1UL), | |
153 | &key_type_rxrpc_s, kdesc); | |
154 | if (IS_ERR(kref)) { | |
248f219c | 155 | read_unlock(&local->services_lock); |
17926a79 DH |
156 | _leave(" = %ld [search]", PTR_ERR(kref)); |
157 | return PTR_ERR(kref); | |
158 | } | |
159 | ||
160 | key = key_ref_to_ptr(kref); | |
248f219c | 161 | read_unlock(&local->services_lock); |
17926a79 DH |
162 | |
163 | conn->server_key = key; | |
164 | conn->security = sec; | |
165 | ||
166 | _leave(" = 0"); | |
167 | return 0; | |
168 | } |