blob: c2a2b584a056ab3b716b985ebf52058f3326fd37 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/net/sunrpc/auth_null.c
3 *
4 * AUTH_NULL authentication. Really :-)
5 *
6 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
7 */
8
9#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/sunrpc/clnt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
Jeff Laytonf895b252014-11-17 16:58:04 -050013#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
Linus Torvalds1da177e2005-04-16 15:20:36 -070014# define RPCDBG_FACILITY RPCDBG_AUTH
15#endif
16
17static struct rpc_auth null_auth;
18static struct rpc_cred null_cred;
19
20static struct rpc_auth *
Trond Myklebustc2190662013-08-26 19:23:04 -040021nul_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022{
23 atomic_inc(&null_auth.au_count);
24 return &null_auth;
25}
26
27static void
28nul_destroy(struct rpc_auth *auth)
29{
30}
31
32/*
33 * Lookup NULL creds for current process
34 */
35static struct rpc_cred *
36nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
37{
NeilBrownbd956082014-07-14 11:28:20 +100038 if (flags & RPCAUTH_LOOKUP_RCU)
39 return &null_cred;
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 return get_rpccred(&null_cred);
41}
42
43/*
44 * Destroy cred handle.
45 */
46static void
47nul_destroy_cred(struct rpc_cred *cred)
48{
49}
50
51/*
52 * Match cred handle against current process
53 */
54static int
55nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
56{
57 return 1;
58}
59
60/*
61 * Marshal credential.
62 */
Alexey Dobriyand8ed0292006-09-26 22:29:38 -070063static __be32 *
64nul_marshal(struct rpc_task *task, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
66 *p++ = htonl(RPC_AUTH_NULL);
67 *p++ = 0;
68 *p++ = htonl(RPC_AUTH_NULL);
69 *p++ = 0;
70
71 return p;
72}
73
74/*
75 * Refresh credential. This is a no-op for AUTH_NULL
76 */
77static int
78nul_refresh(struct rpc_task *task)
79{
Trond Myklebusta17c2152010-07-31 14:29:08 -040080 set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 return 0;
82}
83
Alexey Dobriyand8ed0292006-09-26 22:29:38 -070084static __be32 *
85nul_validate(struct rpc_task *task, __be32 *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
87 rpc_authflavor_t flavor;
88 u32 size;
89
90 flavor = ntohl(*p++);
91 if (flavor != RPC_AUTH_NULL) {
92 printk("RPC: bad verf flavor: %u\n", flavor);
Andy Adamson35fa5f72013-08-14 11:59:17 -040093 return ERR_PTR(-EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 }
95
96 size = ntohl(*p++);
97 if (size != 0) {
98 printk("RPC: bad verf size: %u\n", size);
Andy Adamson35fa5f72013-08-14 11:59:17 -040099 return ERR_PTR(-EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
101
102 return p;
103}
104
Trond Myklebustf1c0a862007-06-23 20:17:58 -0400105const struct rpc_authops authnull_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 .owner = THIS_MODULE,
107 .au_flavor = RPC_AUTH_NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 .au_name = "NULL",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 .create = nul_create,
110 .destroy = nul_destroy,
111 .lookup_cred = nul_lookup_cred,
112};
113
114static
115struct rpc_auth null_auth = {
116 .au_cslack = 4,
117 .au_rslack = 2,
118 .au_ops = &authnull_ops,
Trond Myklebust81039f12006-06-09 09:34:34 -0400119 .au_flavor = RPC_AUTH_NULL,
120 .au_count = ATOMIC_INIT(0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121};
122
123static
Trond Myklebustf1c0a862007-06-23 20:17:58 -0400124const struct rpc_credops null_credops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 .cr_name = "AUTH_NULL",
126 .crdestroy = nul_destroy_cred,
Trond Myklebust5c691042008-03-12 16:21:07 -0400127 .crbind = rpcauth_generic_bind_cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 .crmatch = nul_match,
129 .crmarshal = nul_marshal,
130 .crrefresh = nul_refresh,
131 .crvalidate = nul_validate,
132};
133
134static
135struct rpc_cred null_cred = {
Trond Myklebuste092bdc2007-06-23 19:45:36 -0400136 .cr_lru = LIST_HEAD_INIT(null_cred.cr_lru),
Trond Myklebust4a8c1342007-06-07 10:14:14 -0400137 .cr_auth = &null_auth,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 .cr_ops = &null_credops,
139 .cr_count = ATOMIC_INIT(1),
Trond Myklebustfc432dd2007-06-25 10:15:15 -0400140 .cr_flags = 1UL << RPCAUTH_CRED_UPTODATE,
Jeff Laytonf895b252014-11-17 16:58:04 -0500141#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 .cr_magic = RPCAUTH_CRED_MAGIC,
143#endif
144};