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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/net/sunrpc/auth_null.c | |
4 | * | |
5 | * AUTH_NULL authentication. Really :-) | |
6 | * | |
7 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> | |
8 | */ | |
9 | ||
10 | #include <linux/types.h> | |
1da177e4 | 11 | #include <linux/module.h> |
1da177e4 | 12 | #include <linux/sunrpc/clnt.h> |
1da177e4 | 13 | |
f895b252 | 14 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
1da177e4 LT |
15 | # define RPCDBG_FACILITY RPCDBG_AUTH |
16 | #endif | |
17 | ||
18 | static struct rpc_auth null_auth; | |
19 | static struct rpc_cred null_cred; | |
20 | ||
21 | static struct rpc_auth * | |
82b98ca5 | 22 | nul_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
1da177e4 | 23 | { |
331bc71c | 24 | refcount_inc(&null_auth.au_count); |
1da177e4 LT |
25 | return &null_auth; |
26 | } | |
27 | ||
28 | static void | |
29 | nul_destroy(struct rpc_auth *auth) | |
30 | { | |
31 | } | |
32 | ||
33 | /* | |
34 | * Lookup NULL creds for current process | |
35 | */ | |
36 | static struct rpc_cred * | |
37 | nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) | |
38 | { | |
bd956080 N |
39 | if (flags & RPCAUTH_LOOKUP_RCU) |
40 | return &null_cred; | |
1da177e4 LT |
41 | return get_rpccred(&null_cred); |
42 | } | |
43 | ||
44 | /* | |
45 | * Destroy cred handle. | |
46 | */ | |
47 | static void | |
48 | nul_destroy_cred(struct rpc_cred *cred) | |
49 | { | |
50 | } | |
51 | ||
52 | /* | |
53 | * Match cred handle against current process | |
54 | */ | |
55 | static int | |
56 | nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags) | |
57 | { | |
58 | return 1; | |
59 | } | |
60 | ||
61 | /* | |
62 | * Marshal credential. | |
63 | */ | |
d8ed029d AD |
64 | static __be32 * |
65 | nul_marshal(struct rpc_task *task, __be32 *p) | |
1da177e4 LT |
66 | { |
67 | *p++ = htonl(RPC_AUTH_NULL); | |
68 | *p++ = 0; | |
69 | *p++ = htonl(RPC_AUTH_NULL); | |
70 | *p++ = 0; | |
71 | ||
72 | return p; | |
73 | } | |
74 | ||
75 | /* | |
76 | * Refresh credential. This is a no-op for AUTH_NULL | |
77 | */ | |
78 | static int | |
79 | nul_refresh(struct rpc_task *task) | |
80 | { | |
a17c2153 | 81 | set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags); |
1da177e4 LT |
82 | return 0; |
83 | } | |
84 | ||
d8ed029d AD |
85 | static __be32 * |
86 | nul_validate(struct rpc_task *task, __be32 *p) | |
1da177e4 LT |
87 | { |
88 | rpc_authflavor_t flavor; | |
89 | u32 size; | |
90 | ||
91 | flavor = ntohl(*p++); | |
92 | if (flavor != RPC_AUTH_NULL) { | |
93 | printk("RPC: bad verf flavor: %u\n", flavor); | |
35fa5f7b | 94 | return ERR_PTR(-EIO); |
1da177e4 LT |
95 | } |
96 | ||
97 | size = ntohl(*p++); | |
98 | if (size != 0) { | |
99 | printk("RPC: bad verf size: %u\n", size); | |
35fa5f7b | 100 | return ERR_PTR(-EIO); |
1da177e4 LT |
101 | } |
102 | ||
103 | return p; | |
104 | } | |
105 | ||
f1c0a861 | 106 | const struct rpc_authops authnull_ops = { |
1da177e4 LT |
107 | .owner = THIS_MODULE, |
108 | .au_flavor = RPC_AUTH_NULL, | |
1da177e4 | 109 | .au_name = "NULL", |
1da177e4 LT |
110 | .create = nul_create, |
111 | .destroy = nul_destroy, | |
112 | .lookup_cred = nul_lookup_cred, | |
113 | }; | |
114 | ||
115 | static | |
116 | struct rpc_auth null_auth = { | |
4500632f CL |
117 | .au_cslack = NUL_CALLSLACK, |
118 | .au_rslack = NUL_REPLYSLACK, | |
ce52914e | 119 | .au_flags = RPCAUTH_AUTH_NO_CRKEY_TIMEOUT, |
1da177e4 | 120 | .au_ops = &authnull_ops, |
81039f1f | 121 | .au_flavor = RPC_AUTH_NULL, |
331bc71c | 122 | .au_count = REFCOUNT_INIT(1), |
1da177e4 LT |
123 | }; |
124 | ||
125 | static | |
f1c0a861 | 126 | const struct rpc_credops null_credops = { |
1da177e4 LT |
127 | .cr_name = "AUTH_NULL", |
128 | .crdestroy = nul_destroy_cred, | |
5c691044 | 129 | .crbind = rpcauth_generic_bind_cred, |
1da177e4 LT |
130 | .crmatch = nul_match, |
131 | .crmarshal = nul_marshal, | |
132 | .crrefresh = nul_refresh, | |
133 | .crvalidate = nul_validate, | |
134 | }; | |
135 | ||
136 | static | |
137 | struct rpc_cred null_cred = { | |
e092bdcd | 138 | .cr_lru = LIST_HEAD_INIT(null_cred.cr_lru), |
4a8c1344 | 139 | .cr_auth = &null_auth, |
1da177e4 | 140 | .cr_ops = &null_credops, |
79b18181 | 141 | .cr_count = REFCOUNT_INIT(2), |
fc432dd9 | 142 | .cr_flags = 1UL << RPCAUTH_CRED_UPTODATE, |
1da177e4 | 143 | }; |