Linux kernel mirror (for testing)
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linux
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>
10#include <linux/socket.h>
11#include <linux/module.h>
12#include <linux/in.h>
13#include <linux/utsname.h>
14#include <linux/sunrpc/clnt.h>
15#include <linux/sched.h>
16
17#ifdef RPC_DEBUG
18# define RPCDBG_FACILITY RPCDBG_AUTH
19#endif
20
21static struct rpc_auth null_auth;
22static struct rpc_cred null_cred;
23
24static struct rpc_auth *
25nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
26{
27 atomic_inc(&null_auth.au_count);
28 return &null_auth;
29}
30
31static void
32nul_destroy(struct rpc_auth *auth)
33{
34}
35
36/*
37 * Lookup NULL creds for current process
38 */
39static struct rpc_cred *
40nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
41{
42 return get_rpccred(&null_cred);
43}
44
45/*
46 * Destroy cred handle.
47 */
48static void
49nul_destroy_cred(struct rpc_cred *cred)
50{
51}
52
53/*
54 * Match cred handle against current process
55 */
56static int
57nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
58{
59 return 1;
60}
61
62/*
63 * Marshal credential.
64 */
65static u32 *
66nul_marshal(struct rpc_task *task, u32 *p)
67{
68 *p++ = htonl(RPC_AUTH_NULL);
69 *p++ = 0;
70 *p++ = htonl(RPC_AUTH_NULL);
71 *p++ = 0;
72
73 return p;
74}
75
76/*
77 * Refresh credential. This is a no-op for AUTH_NULL
78 */
79static int
80nul_refresh(struct rpc_task *task)
81{
82 task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
83 return 0;
84}
85
86static u32 *
87nul_validate(struct rpc_task *task, u32 *p)
88{
89 rpc_authflavor_t flavor;
90 u32 size;
91
92 flavor = ntohl(*p++);
93 if (flavor != RPC_AUTH_NULL) {
94 printk("RPC: bad verf flavor: %u\n", flavor);
95 return NULL;
96 }
97
98 size = ntohl(*p++);
99 if (size != 0) {
100 printk("RPC: bad verf size: %u\n", size);
101 return NULL;
102 }
103
104 return p;
105}
106
107struct rpc_authops authnull_ops = {
108 .owner = THIS_MODULE,
109 .au_flavor = RPC_AUTH_NULL,
110#ifdef RPC_DEBUG
111 .au_name = "NULL",
112#endif
113 .create = nul_create,
114 .destroy = nul_destroy,
115 .lookup_cred = nul_lookup_cred,
116};
117
118static
119struct rpc_auth null_auth = {
120 .au_cslack = 4,
121 .au_rslack = 2,
122 .au_ops = &authnull_ops,
123};
124
125static
126struct rpc_credops null_credops = {
127 .cr_name = "AUTH_NULL",
128 .crdestroy = nul_destroy_cred,
129 .crmatch = nul_match,
130 .crmarshal = nul_marshal,
131 .crrefresh = nul_refresh,
132 .crvalidate = nul_validate,
133};
134
135static
136struct rpc_cred null_cred = {
137 .cr_ops = &null_credops,
138 .cr_count = ATOMIC_INIT(1),
139 .cr_flags = RPCAUTH_CRED_UPTODATE,
140#ifdef RPC_DEBUG
141 .cr_magic = RPCAUTH_CRED_MAGIC,
142#endif
143};