diff options
Diffstat (limited to 'net/rxrpc/ar-security.c')
| -rw-r--r-- | net/rxrpc/ar-security.c | 166 |
1 files changed, 35 insertions, 131 deletions
diff --git a/net/rxrpc/ar-security.c b/net/rxrpc/ar-security.c index ceff6394a65f..d223253b22fa 100644 --- a/net/rxrpc/ar-security.c +++ b/net/rxrpc/ar-security.c @@ -22,109 +22,60 @@ static LIST_HEAD(rxrpc_security_methods); static DECLARE_RWSEM(rxrpc_security_sem); -/* - * get an RxRPC security module - */ -static struct rxrpc_security *rxrpc_security_get(struct rxrpc_security *sec) -{ - return try_module_get(sec->owner) ? sec : NULL; -} - -/* - * release an RxRPC security module - */ -static void rxrpc_security_put(struct rxrpc_security *sec) +static const struct rxrpc_security *rxrpc_security_types[] = { + [RXRPC_SECURITY_NONE] = &rxrpc_no_security, +#ifdef CONFIG_RXKAD + [RXRPC_SECURITY_RXKAD] = &rxkad, +#endif +}; + +int __init rxrpc_init_security(void) { - module_put(sec->owner); -} - -/* - * look up an rxrpc security module - */ -static struct rxrpc_security *rxrpc_security_lookup(u8 security_index) -{ - struct rxrpc_security *sec = NULL; - - _enter(""); + int i, ret; - down_read(&rxrpc_security_sem); - - list_for_each_entry(sec, &rxrpc_security_methods, link) { - if (sec->security_index == security_index) { - if (unlikely(!rxrpc_security_get(sec))) - break; - goto out; + for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) { + if (rxrpc_security_types[i]) { + ret = rxrpc_security_types[i]->init(); + if (ret < 0) + goto failed; } } - sec = NULL; -out: - up_read(&rxrpc_security_sem); - _leave(" = %p [%s]", sec, sec ? sec->name : ""); - return sec; + return 0; + +failed: + for (i--; i >= 0; i--) + if (rxrpc_security_types[i]) + rxrpc_security_types[i]->exit(); + return ret; } -/** - * rxrpc_register_security - register an RxRPC security handler - * @sec: security module - * - * register an RxRPC security handler for use by RxRPC - */ -int rxrpc_register_security(struct rxrpc_security *sec) +void rxrpc_exit_security(void) { - struct rxrpc_security *psec; - int ret; + int i; - _enter(""); - down_write(&rxrpc_security_sem); - - ret = -EEXIST; - list_for_each_entry(psec, &rxrpc_security_methods, link) { - if (psec->security_index == sec->security_index) - goto out; - } - - list_add(&sec->link, &rxrpc_security_methods); - - printk(KERN_NOTICE "RxRPC: Registered security type %d '%s'\n", - sec->security_index, sec->name); - ret = 0; - -out: - up_write(&rxrpc_security_sem); - _leave(" = %d", ret); - return ret; + for (i = 0; i < ARRAY_SIZE(rxrpc_security_types); i++) + if (rxrpc_security_types[i]) + rxrpc_security_types[i]->exit(); } -EXPORT_SYMBOL_GPL(rxrpc_register_security); - -/** - * rxrpc_unregister_security - unregister an RxRPC security handler - * @sec: security module - * - * unregister an RxRPC security handler +/* + * look up an rxrpc security module */ -void rxrpc_unregister_security(struct rxrpc_security *sec) +static const struct rxrpc_security *rxrpc_security_lookup(u8 security_index) { - - _enter(""); - down_write(&rxrpc_security_sem); - list_del_init(&sec->link); - up_write(&rxrpc_security_sem); - - printk(KERN_NOTICE "RxRPC: Unregistered security type %d '%s'\n", - sec->security_index, sec->name); + if (security_index >= ARRAY_SIZE(rxrpc_security_types)) + return NULL; + return rxrpc_security_types[security_index]; } -EXPORT_SYMBOL_GPL(rxrpc_unregister_security); - /* * initialise the security on a client connection */ int rxrpc_init_client_conn_security(struct rxrpc_connection *conn) { + const struct rxrpc_security *sec; struct rxrpc_key_token *token; - struct rxrpc_security *sec; struct key *key = conn->key; int ret; @@ -148,8 +99,7 @@ int rxrpc_init_client_conn_security(struct rxrpc_connection *conn) ret = conn->security->init_connection_security(conn); if (ret < 0) { - rxrpc_security_put(conn->security); - conn->security = NULL; + conn->security = &rxrpc_no_security; return ret; } @@ -162,7 +112,7 @@ int rxrpc_init_client_conn_security(struct rxrpc_connection *conn) */ int rxrpc_init_server_conn_security(struct rxrpc_connection *conn) { - struct rxrpc_security *sec; + const struct rxrpc_security *sec; struct rxrpc_local *local = conn->trans->local; struct rxrpc_sock *rx; struct key *key; @@ -188,14 +138,12 @@ int rxrpc_init_server_conn_security(struct rxrpc_connection *conn) /* the service appears to have died */ read_unlock_bh(&local->services_lock); - rxrpc_security_put(sec); _leave(" = -ENOENT"); return -ENOENT; found_service: if (!rx->securities) { read_unlock_bh(&local->services_lock); - rxrpc_security_put(sec); _leave(" = -ENOKEY"); return -ENOKEY; } @@ -205,7 +153,6 @@ found_service: &key_type_rxrpc_s, kdesc); if (IS_ERR(kref)) { read_unlock_bh(&local->services_lock); - rxrpc_security_put(sec); _leave(" = %ld [search]", PTR_ERR(kref)); return PTR_ERR(kref); } @@ -219,46 +166,3 @@ found_service: _leave(" = 0"); return 0; } - -/* - * secure a packet prior to transmission - */ -int rxrpc_secure_packet(const struct rxrpc_call *call, - struct sk_buff *skb, - size_t data_size, - void *sechdr) -{ - if (call->conn->security) - return call->conn->security->secure_packet( - call, skb, data_size, sechdr); - return 0; -} - -/* - * secure a packet prior to transmission - */ -int rxrpc_verify_packet(const struct rxrpc_call *call, struct sk_buff *skb, - u32 *_abort_code) -{ - if (call->conn->security) - return call->conn->security->verify_packet( - call, skb, _abort_code); - return 0; -} - -/* - * clear connection security - */ -void rxrpc_clear_conn_security(struct rxrpc_connection *conn) -{ - _enter("{%d}", conn->debug_id); - - if (conn->security) { - conn->security->clear(conn); - rxrpc_security_put(conn->security); - conn->security = NULL; - } - - key_put(conn->key); - key_put(conn->server_key); -} |