1 /*
2 * Copyright (c) 2010, Oracle America, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following
12 * disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 * * Neither the name of the "Oracle America, Inc." nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
25 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31 /*
32 * auth_none.c
33 * Creates a client authentication handle for passing "null"
34 * credentials and verifiers to remote systems.
35 */
36
37 #include <rpc/rpc.h>
38 #include <libc-lock.h>
39 #include <shlib-compat.h>
40
41 #define MAX_MARSHAL_SIZE 20
42
43 /*
44 * Authenticator operations routines
45 */
46 static void authnone_verf (AUTH *);
47 static void authnone_destroy (AUTH *);
48 static bool_t authnone_marshal (AUTH *, XDR *);
49 static bool_t authnone_validate (AUTH *, struct opaque_auth *);
50 static bool_t authnone_refresh (AUTH *);
51
52 static const struct auth_ops ops = {
53 authnone_verf,
54 authnone_marshal,
55 authnone_validate,
56 authnone_refresh,
57 authnone_destroy
58 };
59
60 /* Internal data and routines */
61
62 struct authnone_private_s {
63 AUTH no_client;
64 char marshalled_client[MAX_MARSHAL_SIZE];
65 u_int mcnt;
66 };
67
68 static struct authnone_private_s authnone_private;
69 __libc_once_define(static, authnone_private_guard);
70
71 static void authnone_create_once (void);
72
73 static void
authnone_create_once(void)74 authnone_create_once (void)
75 {
76 struct authnone_private_s *ap;
77 XDR xdr_stream;
78 XDR *xdrs;
79
80 ap = &authnone_private;
81
82 ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
83 ap->no_client.ah_ops = (struct auth_ops *) &ops;
84 xdrs = &xdr_stream;
85 xdrmem_create (xdrs, ap->marshalled_client,
86 (u_int) MAX_MARSHAL_SIZE, XDR_ENCODE);
87 (void) xdr_opaque_auth (xdrs, &ap->no_client.ah_cred);
88 (void) xdr_opaque_auth (xdrs, &ap->no_client.ah_verf);
89 ap->mcnt = XDR_GETPOS (xdrs);
90 XDR_DESTROY (xdrs);
91 }
92
93 AUTH *
authnone_create(void)94 authnone_create (void)
95 {
96 __libc_once (authnone_private_guard, authnone_create_once);
97 return &authnone_private.no_client;
98 }
libc_hidden_nolink_sunrpc(authnone_create,GLIBC_2_0)99 libc_hidden_nolink_sunrpc (authnone_create, GLIBC_2_0)
100
101 static bool_t
102 authnone_marshal (AUTH *client, XDR *xdrs)
103 {
104 struct authnone_private_s *ap;
105
106 /* authnone_create returned authnone_private->no_client, which is
107 the first field of struct authnone_private_s. */
108 ap = (struct authnone_private_s *) client;
109 if (ap == NULL)
110 return FALSE;
111 return (*xdrs->x_ops->x_putbytes) (xdrs, ap->marshalled_client, ap->mcnt);
112 }
113
114 static void
authnone_verf(AUTH * auth)115 authnone_verf (AUTH *auth)
116 {
117 }
118
119 static bool_t
authnone_validate(AUTH * auth,struct opaque_auth * oa)120 authnone_validate (AUTH *auth, struct opaque_auth *oa)
121 {
122 return TRUE;
123 }
124
125 static bool_t
authnone_refresh(AUTH * auth)126 authnone_refresh (AUTH *auth)
127 {
128 return FALSE;
129 }
130
131 static void
authnone_destroy(AUTH * auth)132 authnone_destroy (AUTH *auth)
133 {
134 }
135