Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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> | |
1da177e4 | 10 | #include <linux/module.h> |
1da177e4 LT |
11 | #include <linux/utsname.h> |
12 | #include <linux/sunrpc/clnt.h> | |
13 | #include <linux/sched.h> | |
14 | ||
15 | #ifdef RPC_DEBUG | |
16 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
17 | #endif | |
18 | ||
19 | static struct rpc_auth null_auth; | |
20 | static struct rpc_cred null_cred; | |
21 | ||
22 | static struct rpc_auth * | |
23 | nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) | |
24 | { | |
25 | atomic_inc(&null_auth.au_count); | |
26 | return &null_auth; | |
27 | } | |
28 | ||
29 | static void | |
30 | nul_destroy(struct rpc_auth *auth) | |
31 | { | |
32 | } | |
33 | ||
34 | /* | |
35 | * Lookup NULL creds for current process | |
36 | */ | |
37 | static struct rpc_cred * | |
38 | nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) | |
39 | { | |
40 | return get_rpccred(&null_cred); | |
41 | } | |
42 | ||
43 | /* | |
44 | * Destroy cred handle. | |
45 | */ | |
46 | static void | |
47 | nul_destroy_cred(struct rpc_cred *cred) | |
48 | { | |
49 | } | |
50 | ||
51 | /* | |
52 | * Match cred handle against current process | |
53 | */ | |
54 | static int | |
55 | nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags) | |
56 | { | |
57 | return 1; | |
58 | } | |
59 | ||
60 | /* | |
61 | * Marshal credential. | |
62 | */ | |
63 | static u32 * | |
64 | nul_marshal(struct rpc_task *task, u32 *p) | |
65 | { | |
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 | */ | |
77 | static int | |
78 | nul_refresh(struct rpc_task *task) | |
79 | { | |
80 | task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE; | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static u32 * | |
85 | nul_validate(struct rpc_task *task, u32 *p) | |
86 | { | |
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); | |
93 | return NULL; | |
94 | } | |
95 | ||
96 | size = ntohl(*p++); | |
97 | if (size != 0) { | |
98 | printk("RPC: bad verf size: %u\n", size); | |
99 | return NULL; | |
100 | } | |
101 | ||
102 | return p; | |
103 | } | |
104 | ||
105 | struct rpc_authops authnull_ops = { | |
106 | .owner = THIS_MODULE, | |
107 | .au_flavor = RPC_AUTH_NULL, | |
108 | #ifdef RPC_DEBUG | |
109 | .au_name = "NULL", | |
110 | #endif | |
111 | .create = nul_create, | |
112 | .destroy = nul_destroy, | |
113 | .lookup_cred = nul_lookup_cred, | |
114 | }; | |
115 | ||
116 | static | |
117 | struct rpc_auth null_auth = { | |
118 | .au_cslack = 4, | |
119 | .au_rslack = 2, | |
120 | .au_ops = &authnull_ops, | |
121 | }; | |
122 | ||
123 | static | |
124 | struct rpc_credops null_credops = { | |
125 | .cr_name = "AUTH_NULL", | |
126 | .crdestroy = nul_destroy_cred, | |
127 | .crmatch = nul_match, | |
128 | .crmarshal = nul_marshal, | |
129 | .crrefresh = nul_refresh, | |
130 | .crvalidate = nul_validate, | |
131 | }; | |
132 | ||
133 | static | |
134 | struct rpc_cred null_cred = { | |
135 | .cr_ops = &null_credops, | |
136 | .cr_count = ATOMIC_INIT(1), | |
137 | .cr_flags = RPCAUTH_CRED_UPTODATE, | |
138 | #ifdef RPC_DEBUG | |
139 | .cr_magic = RPCAUTH_CRED_MAGIC, | |
140 | #endif | |
141 | }; |