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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/net/sunrpc/auth_null.c | |
3 | * | |
4 | * AUTH_NULL authentication. Really :-) | |
5 | * | |
6 | * Copyright (C) 1996, Olaf Kirch <[email protected]> | |
7 | */ | |
8 | ||
9 | #include <linux/types.h> | |
1da177e4 | 10 | #include <linux/module.h> |
1da177e4 | 11 | #include <linux/sunrpc/clnt.h> |
1da177e4 LT |
12 | |
13 | #ifdef RPC_DEBUG | |
14 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
15 | #endif | |
16 | ||
17 | static struct rpc_auth null_auth; | |
18 | static struct rpc_cred null_cred; | |
19 | ||
20 | static struct rpc_auth * | |
21 | nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) | |
22 | { | |
23 | atomic_inc(&null_auth.au_count); | |
24 | return &null_auth; | |
25 | } | |
26 | ||
27 | static void | |
28 | nul_destroy(struct rpc_auth *auth) | |
29 | { | |
30 | } | |
31 | ||
32 | /* | |
33 | * Lookup NULL creds for current process | |
34 | */ | |
35 | static struct rpc_cred * | |
36 | nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) | |
37 | { | |
38 | return get_rpccred(&null_cred); | |
39 | } | |
40 | ||
41 | /* | |
42 | * Destroy cred handle. | |
43 | */ | |
44 | static void | |
45 | nul_destroy_cred(struct rpc_cred *cred) | |
46 | { | |
47 | } | |
48 | ||
49 | /* | |
50 | * Match cred handle against current process | |
51 | */ | |
52 | static int | |
53 | nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags) | |
54 | { | |
55 | return 1; | |
56 | } | |
57 | ||
58 | /* | |
59 | * Marshal credential. | |
60 | */ | |
d8ed029d AD |
61 | static __be32 * |
62 | nul_marshal(struct rpc_task *task, __be32 *p) | |
1da177e4 LT |
63 | { |
64 | *p++ = htonl(RPC_AUTH_NULL); | |
65 | *p++ = 0; | |
66 | *p++ = htonl(RPC_AUTH_NULL); | |
67 | *p++ = 0; | |
68 | ||
69 | return p; | |
70 | } | |
71 | ||
72 | /* | |
73 | * Refresh credential. This is a no-op for AUTH_NULL | |
74 | */ | |
75 | static int | |
76 | nul_refresh(struct rpc_task *task) | |
77 | { | |
fc432dd9 | 78 | set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_msg.rpc_cred->cr_flags); |
1da177e4 LT |
79 | return 0; |
80 | } | |
81 | ||
d8ed029d AD |
82 | static __be32 * |
83 | nul_validate(struct rpc_task *task, __be32 *p) | |
1da177e4 LT |
84 | { |
85 | rpc_authflavor_t flavor; | |
86 | u32 size; | |
87 | ||
88 | flavor = ntohl(*p++); | |
89 | if (flavor != RPC_AUTH_NULL) { | |
90 | printk("RPC: bad verf flavor: %u\n", flavor); | |
91 | return NULL; | |
92 | } | |
93 | ||
94 | size = ntohl(*p++); | |
95 | if (size != 0) { | |
96 | printk("RPC: bad verf size: %u\n", size); | |
97 | return NULL; | |
98 | } | |
99 | ||
100 | return p; | |
101 | } | |
102 | ||
f1c0a861 | 103 | const struct rpc_authops authnull_ops = { |
1da177e4 LT |
104 | .owner = THIS_MODULE, |
105 | .au_flavor = RPC_AUTH_NULL, | |
1da177e4 | 106 | .au_name = "NULL", |
1da177e4 LT |
107 | .create = nul_create, |
108 | .destroy = nul_destroy, | |
109 | .lookup_cred = nul_lookup_cred, | |
110 | }; | |
111 | ||
112 | static | |
113 | struct rpc_auth null_auth = { | |
114 | .au_cslack = 4, | |
115 | .au_rslack = 2, | |
116 | .au_ops = &authnull_ops, | |
81039f1f TM |
117 | .au_flavor = RPC_AUTH_NULL, |
118 | .au_count = ATOMIC_INIT(0), | |
1da177e4 LT |
119 | }; |
120 | ||
121 | static | |
f1c0a861 | 122 | const struct rpc_credops null_credops = { |
1da177e4 LT |
123 | .cr_name = "AUTH_NULL", |
124 | .crdestroy = nul_destroy_cred, | |
5c691044 | 125 | .crbind = rpcauth_generic_bind_cred, |
1da177e4 LT |
126 | .crmatch = nul_match, |
127 | .crmarshal = nul_marshal, | |
128 | .crrefresh = nul_refresh, | |
129 | .crvalidate = nul_validate, | |
130 | }; | |
131 | ||
132 | static | |
133 | struct rpc_cred null_cred = { | |
e092bdcd | 134 | .cr_lru = LIST_HEAD_INIT(null_cred.cr_lru), |
4a8c1344 | 135 | .cr_auth = &null_auth, |
1da177e4 LT |
136 | .cr_ops = &null_credops, |
137 | .cr_count = ATOMIC_INIT(1), | |
fc432dd9 | 138 | .cr_flags = 1UL << RPCAUTH_CRED_UPTODATE, |
1da177e4 LT |
139 | #ifdef RPC_DEBUG |
140 | .cr_magic = RPCAUTH_CRED_MAGIC, | |
141 | #endif | |
142 | }; |