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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
#ident "@(#)svc_auth.c 1.16 94/04/24 SMI"
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
#endif
/*
* svc_auth.c, Server-side rpc authenticator interface.
*
*/
#ifdef KERNEL
#include <sys/param.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>
#include <rpc/clnt.h>
#include <rpc/rpc_msg.h>
#include <rpc/svc.h>
#include <rpc/svc_auth.h>
#else
#include <stdlib.h>
#include <rpc/rpc.h>
#endif
#include <sys/types.h>
/*
* svcauthsw is the bdevsw of server side authentication.
*
* Server side authenticators are called from authenticate by
* using the client auth struct flavor field to index into svcauthsw.
* The server auth flavors must implement a routine that looks
* like:
*
* enum auth_stat
* flavorx_auth(rqst, msg)
* register struct svc_req *rqst;
* register struct rpc_msg *msg;
*
*/
enum auth_stat _svcauth_null(); /* no authentication */
enum auth_stat _svcauth_unix(); /* (system) unix style (uid, gids) */
enum auth_stat _svcauth_short(); /* short hand unix style */
enum auth_stat _svcauth_des(); /* des style */
/* declarations to allow servers to specify new authentication flavors */
struct authsvc {
int flavor;
enum auth_stat (*handler)();
struct authsvc *next;
};
static struct authsvc *Auths = NULL;
/*
* The call rpc message, msg has been obtained from the wire. The msg contains
* the raw form of credentials and verifiers. authenticate returns AUTH_OK
* if the msg is successfully authenticated. If AUTH_OK then the routine also
* does the following things:
* set rqst->rq_xprt->verf to the appropriate response verifier;
* sets rqst->rq_client_cred to the "cooked" form of the credentials.
*
* NB: rqst->rq_cxprt->verf must be pre-alloctaed;
* its length is set appropriately.
*
* The caller still owns and is responsible for msg->u.cmb.cred and
* msg->u.cmb.verf. The authentication system retains ownership of
* rqst->rq_client_cred, the cooked credentials.
*
* There is an assumption that any flavour less than AUTH_NULL is
* invalid.
*/
enum auth_stat
_authenticate(rqst, msg)
register struct svc_req *rqst;
struct rpc_msg *msg;
{
register int cred_flavor;
register struct authsvc *asp;
rqst->rq_cred = msg->rm_call.cb_cred;
rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
rqst->rq_xprt->xp_verf.oa_length = 0;
cred_flavor = rqst->rq_cred.oa_flavor;
switch (cred_flavor) {
case AUTH_NULL:
return(_svcauth_null(rqst, msg));
case AUTH_UNIX:
return(_svcauth_unix(rqst, msg));
case AUTH_SHORT:
return(_svcauth_short(rqst, msg));
/*
* We leave AUTH_DES turned off by default because svcauth_des()
* needs getpublickey(), which is in librpcsvc, not libc. If we
* included AUTH_DES as a built-in flavor, programs that don't
* have -lrpcsvc in their Makefiles wouldn't link correctly, even
* though they don't use AUTH_DES. And I'm too lazy to go through
* the tree looking for all of them.
*/
#ifdef DES_BUILTIN
case AUTH_DES:
return(_svcauth_des(rqst, msg));
#endif
}
/* flavor doesn't match any of the builtin types, so try new ones */
for (asp = Auths; asp; asp = asp->next) {
if (asp->flavor == cred_flavor) {
enum auth_stat as;
as = (*asp->handler)(rqst, msg);
return (as);
}
}
return (AUTH_REJECTEDCRED);
}
/*ARGSUSED*/
enum auth_stat
_svcauth_null(rqst, msg)
struct svc_req *rqst;
struct rpc_msg *msg;
{
return (AUTH_OK);
}
/*
* Allow the rpc service to register new authentication types that it is
* prepared to handle. When an authentication flavor is registered,
* the flavor is checked against already registered values. If not
* registered, then a new Auths entry is added on the list.
*
* There is no provision to delete a registration once registered.
*
* This routine returns:
* 0 if registration successful
* 1 if flavor already registered
* -1 if can't register (errno set)
*/
int
svc_auth_reg(cred_flavor, handler)
register int cred_flavor;
enum auth_stat (*handler)();
{
register struct authsvc *asp;
switch (cred_flavor) {
case AUTH_NULL:
case AUTH_UNIX:
case AUTH_SHORT:
#ifdef DES_BUILTIN
case AUTH_DES:
#endif
/* already registered */
return (1);
default:
for (asp = Auths; asp; asp = asp->next) {
if (asp->flavor == cred_flavor) {
/* already registered */
return (1);
}
}
/* this is a new one, so go ahead and register it */
asp = (struct authsvc *)mem_alloc(sizeof (*asp));
if (asp == NULL) {
return (-1);
}
asp->flavor = cred_flavor;
asp->handler = handler;
asp->next = Auths;
Auths = asp;
break;
}
return (0);
}
|
