1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* linux/net/sunrpc/rpcauth_null.c
*
* AUTH_NULL authentication. Really :-)
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/utsname.h>
#include <linux/sunrpc/clnt.h>
#ifdef RPC_DEBUG
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
static struct rpc_auth *
nul_create(struct rpc_clnt *clnt)
{
struct rpc_auth *auth;
dprintk("RPC: creating NULL authenticator for client %p\n", clnt);
if (!(auth = (struct rpc_auth *) rpc_allocate(0, sizeof(*auth))))
return NULL;
auth->au_cslack = 4;
auth->au_rslack = 2;
auth->au_ops = &authnull_ops;
auth->au_expire = 1800 * HZ;
rpcauth_init_credcache(auth);
return (struct rpc_auth *) auth;
}
static void
nul_destroy(struct rpc_auth *auth)
{
dprintk("RPC: destroying NULL authenticator %p\n", auth);
rpcauth_free_credcache(auth);
rpc_free(auth);
}
/*
* Create NULL creds for current process
*/
static struct rpc_cred *
nul_create_cred(int flags)
{
struct rpc_cred *cred;
if (!(cred = (struct rpc_cred *) rpc_allocate(flags, sizeof(*cred))))
return NULL;
cred->cr_count = 0;
cred->cr_flags = RPCAUTH_CRED_UPTODATE;
cred->cr_uid = current->uid;
return cred;
}
/*
* Destroy cred handle.
*/
static void
nul_destroy_cred(struct rpc_cred *cred)
{
rpc_free(cred);
}
/*
* Match cred handle against current process
*/
static int
nul_match(struct rpc_cred *cred, int taskflags)
{
return 1;
}
/*
* Marshal credential.
*/
static u32 *
nul_marshal(struct rpc_task *task, u32 *p, int ruid)
{
*p++ = htonl(RPC_AUTH_NULL);
*p++ = 0;
*p++ = htonl(RPC_AUTH_NULL);
*p++ = 0;
return p;
}
/*
* Refresh credential. This is a no-op for AUTH_NULL
*/
static int
nul_refresh(struct rpc_task *task)
{
return task->tk_status = -EACCES;
}
static u32 *
nul_validate(struct rpc_task *task, u32 *p)
{
u32 n = ntohl(*p++);
if (n != RPC_AUTH_NULL) {
printk("RPC: bad verf flavor: %ld\n", (unsigned long) n);
return NULL;
}
if ((n = ntohl(*p++)) != 0) {
printk("RPC: bad verf size: %ld\n", (unsigned long) n);
return NULL;
}
return p;
}
struct rpc_authops authnull_ops = {
RPC_AUTH_NULL,
#ifdef RPC_DEBUG
"NULL",
#endif
nul_create,
nul_destroy,
nul_create_cred,
nul_destroy_cred,
nul_match,
nul_marshal,
nul_refresh,
nul_validate
};
|
