1 /* $OpenBSD: auth_none.c,v 1.15 2022/02/14 03:38:59 guenther Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * auth_none.c
36 * Creates a client authentication handle for passing "null"
37 * credentials and verifiers to remote systems.
38 */
39
40 #include <stdlib.h>
41 #include <rpc/types.h>
42 #include <rpc/rpc.h>
43 #include <rpc/xdr.h>
44 #include <rpc/auth.h>
45 #define MAX_MARSHEL_SIZE 20
46
47 /*
48 * Authenticator operations routines
49 */
50 static void authnone_destroy(struct __rpc_auth *);
51 static void authnone_verf(struct __rpc_auth *);
52 static bool_t authnone_validate(struct __rpc_auth *, struct opaque_auth *);
53 static bool_t authnone_marshal(struct __rpc_auth *, XDR *);
54 static bool_t authnone_refresh(struct __rpc_auth *);
55
56 static const struct auth_ops ops = {
57 authnone_verf,
58 authnone_marshal,
59 authnone_validate,
60 authnone_refresh,
61 authnone_destroy
62 };
63
64 static struct authnone_private {
65 AUTH no_client;
66 char marshalled_client[MAX_MARSHEL_SIZE];
67 u_int mcnt;
68 } *authnone_private;
69
70 AUTH *
authnone_create(void)71 authnone_create(void)
72 {
73 struct authnone_private *ap = authnone_private;
74 XDR xdr_stream;
75 XDR *xdrs;
76
77 if (ap == NULL) {
78 ap = calloc(1, sizeof (*ap));
79 if (ap == NULL)
80 return (NULL);
81 authnone_private = ap;
82 }
83 if (!ap->mcnt) {
84 ap->no_client.ah_cred = ap->no_client.ah_verf = _null_auth;
85 ap->no_client.ah_ops = &ops;
86 xdrs = &xdr_stream;
87 xdrmem_create(xdrs, ap->marshalled_client, (u_int)MAX_MARSHEL_SIZE,
88 XDR_ENCODE);
89 (void)xdr_opaque_auth(xdrs, &ap->no_client.ah_cred);
90 (void)xdr_opaque_auth(xdrs, &ap->no_client.ah_verf);
91 ap->mcnt = XDR_GETPOS(xdrs);
92 XDR_DESTROY(xdrs);
93 }
94 return (&ap->no_client);
95 }
96 DEF_WEAK(authnone_create);
97
98 static bool_t
authnone_marshal(AUTH * client,XDR * xdrs)99 authnone_marshal(AUTH *client, XDR *xdrs)
100 {
101 struct authnone_private *ap = authnone_private;
102
103 if (ap == NULL)
104 return (0);
105 return ((*xdrs->x_ops->x_putbytes)(xdrs,
106 ap->marshalled_client, ap->mcnt));
107 }
108
109 static void
authnone_verf(struct __rpc_auth * none)110 authnone_verf(struct __rpc_auth *none)
111 {
112 }
113
114 static bool_t
authnone_validate(struct __rpc_auth * none,struct opaque_auth * noauth)115 authnone_validate(struct __rpc_auth *none, struct opaque_auth *noauth)
116 {
117
118 return (TRUE);
119 }
120
121 static bool_t
authnone_refresh(struct __rpc_auth * none)122 authnone_refresh(struct __rpc_auth *none)
123 {
124
125 return (FALSE);
126 }
127
128 static void
authnone_destroy(struct __rpc_auth * none)129 authnone_destroy(struct __rpc_auth *none)
130 {
131 }
132