ReactOS 0.4.15-dev-8219-ge8b88cf
svc_auth.c
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1
2/*
3 * Copyright (c) 2009, Sun Microsystems, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 * - Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * - Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * - Neither the name of Sun Microsystems, Inc. nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29/*
30 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
31 */
32
33/*
34 * svc_auth.c, Server-side rpc authenticator interface.
35 *
36 */
37#include <wintirpc.h>
38//#include <pthread.h>
39#include <reentrant.h>
40#include <sys/types.h>
41#include <rpc/rpc.h>
42#include <stdlib.h>
43
44/*
45 * svcauthsw is the bdevsw of server side authentication.
46 *
47 * Server side authenticators are called from authenticate by
48 * using the client auth struct flavor field to index into svcauthsw.
49 * The server auth flavors must implement a routine that looks
50 * like:
51 *
52 * enum auth_stat
53 * flavorx_auth(rqst, msg)
54 * struct svc_req *rqst;
55 * struct rpc_msg *msg;
56 *
57 */
58
59/* declarations to allow servers to specify new authentication flavors */
60struct authsvc {
61 int flavor;
62 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *);
63 struct authsvc *next;
64};
65static struct authsvc *Auths = NULL;
66
67/*
68 * The call rpc message, msg has been obtained from the wire. The msg contains
69 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
70 * if the msg is successfully authenticated. If AUTH_OK then the routine also
71 * does the following things:
72 * set rqst->rq_xprt->verf to the appropriate response verifier;
73 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
74 *
75 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
76 * its length is set appropriately.
77 *
78 * The caller still owns and is responsible for msg->u.cmb.cred and
79 * msg->u.cmb.verf. The authentication system retains ownership of
80 * rqst->rq_client_cred, the cooked credentials.
81 *
82 * There is an assumption that any flavour less than AUTH_NULL is
83 * invalid.
84 */
85enum auth_stat
87 struct svc_req *rqst;
88 struct rpc_msg *msg;
89{
90 int cred_flavor;
91 struct authsvc *asp;
92 enum auth_stat dummy;
93 extern mutex_t authsvc_lock;
94
95/* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */
96
97 rqst->rq_cred = msg->rm_call.cb_cred;
98 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
99 rqst->rq_xprt->xp_verf.oa_length = 0;
100 cred_flavor = rqst->rq_cred.oa_flavor;
101 switch (cred_flavor) {
102 case AUTH_NULL:
103 dummy = _svcauth_null(rqst, msg);
104 return (dummy);
105 case AUTH_SYS:
106 dummy = _svcauth_unix(rqst, msg);
107 return (dummy);
108 case AUTH_SHORT:
109 dummy = _svcauth_short(rqst, msg);
110 return (dummy);
111#ifdef DES_BUILTIN
112 case AUTH_DES:
113 dummy = _svcauth_des(rqst, msg);
114 return (dummy);
115#endif
116 default:
117 break;
118 }
119
120 /* flavor doesn't match any of the builtin types, so try new ones */
122 for (asp = Auths; asp; asp = asp->next) {
123 if (asp->flavor == cred_flavor) {
124 enum auth_stat as;
125
126 as = (*asp->handler)(rqst, msg);
128 return (as);
129 }
130 }
132
133 return (AUTH_REJECTEDCRED);
134}
135
136/*ARGSUSED*/
137enum auth_stat
139 struct svc_req *rqst;
140 struct rpc_msg *msg;
141{
142 return (AUTH_OK);
143}
144
145/*
146 * Allow the rpc service to register new authentication types that it is
147 * prepared to handle. When an authentication flavor is registered,
148 * the flavor is checked against already registered values. If not
149 * registered, then a new Auths entry is added on the list.
150 *
151 * There is no provision to delete a registration once registered.
152 *
153 * This routine returns:
154 * 0 if registration successful
155 * 1 if flavor already registered
156 * -1 if can't register (errno set)
157 */
158
159int
161 int cred_flavor;
162 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *);
163{
164 struct authsvc *asp;
165 extern mutex_t authsvc_lock;
166
167 switch (cred_flavor) {
168 case AUTH_NULL:
169 case AUTH_SYS:
170 case AUTH_SHORT:
171#ifdef DES_BUILTIN
172 case AUTH_DES:
173#endif
174 /* already registered */
175 return (1);
176
177 default:
179 for (asp = Auths; asp; asp = asp->next) {
180 if (asp->flavor == cred_flavor) {
181 /* already registered */
183 return (1);
184 }
185 }
186
187 /* this is a new one, so go ahead and register it */
188 asp = mem_alloc(sizeof (*asp));
189 if (asp == NULL) {
191 return (-1);
192 }
193 asp->flavor = cred_flavor;
194 asp->handler = handler;
195 asp->next = Auths;
196 Auths = asp;
198 break;
199 }
200 return (0);
201}
#define msg(x)
Definition: auth_time.c:54
#define AUTH_SYS
Definition: auth.h:403
#define AUTH_SHORT
Definition: auth.h:405
auth_stat
Definition: auth.h:144
@ AUTH_OK
Definition: auth.h:145
@ AUTH_REJECTEDCRED
Definition: auth.h:150
#define AUTH_DES
Definition: auth.h:407
#define AUTH_NULL
Definition: auth.h:402
#define NULL
Definition: types.h:112
#define mem_alloc(bsize)
Definition: types.h:123
UINT(* handler)(MSIPACKAGE *)
Definition: action.c:7482
mutex_t authsvc_lock
Definition: mt_misc.c:47
#define mutex_lock(m)
Definition: reentrant.h:128
#define mutex_unlock(m)
Definition: reentrant.h:129
struct opaque_auth _null_auth
struct opaque_auth xp_verf
Definition: svc.h:121
int flavor
Definition: svc_auth.c:61
enum auth_stat(* handler)(struct svc_req *, struct rpc_msg *)
Definition: svc_auth.c:62
struct authsvc * next
Definition: svc_auth.c:63
Definition: module.h:456
Definition: svc.h:132
struct opaque_auth rq_cred
Definition: svc.h:137
SVCXPRT * rq_xprt
Definition: svc.h:139
enum auth_stat _svcauth_null(struct svc_req *rqst, struct rpc_msg *msg)
Definition: svc_auth.c:138
int svc_auth_reg(int cred_flavor, enum auth_stat *handler)
Definition: svc_auth.c:160
enum auth_stat _authenticate(struct svc_req *rqst, struct rpc_msg *msg)
Definition: svc_auth.c:86
static struct authsvc * Auths
Definition: svc_auth.c:65
enum auth_stat _svcauth_des(struct svc_req *rqst, struct rpc_msg *msg)
Definition: svc_auth_des.c:106
enum auth_stat _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg)
Definition: svc_auth_unix.c:51
enum auth_stat _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg)