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95f51977 C |
1 | /* |
2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
3 | * unrestricted use provided that this legend is included on all tape | |
4 | * media and as a part of the software program in whole or part. Users | |
5 | * may copy or modify Sun RPC without charge, but are not authorized | |
6 | * to license or distribute it to anyone else except as part of a product or | |
7 | * program developed by the user. | |
8 | * | |
9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
12 | * | |
13 | * Sun RPC is provided with no support and without any obligation on the | |
14 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
15 | * modification or enhancement. | |
16 | * | |
17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
19 | * OR ANY PART THEREOF. | |
20 | * | |
21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
22 | * or profits or other special, indirect and consequential damages, even if | |
23 | * Sun has been advised of the possibility of such damages. | |
24 | * | |
25 | * Sun Microsystems, Inc. | |
26 | * 2550 Garcia Avenue | |
27 | * Mountain View, California 94043 | |
28 | */ | |
29 | #ifndef lint | |
30 | static char sccsid[] = "@(#)svc_auth.c 1.4 85/03/17 Copyr 1984 Sun Micro"; | |
31 | #endif | |
32 | ||
33 | /* | |
34 | * svc_auth.c, Server-side rpc authenticator interface. | |
35 | * | |
36 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
37 | */ | |
38 | ||
39 | #include "types.h" | |
40 | #include <netinet/in.h> | |
41 | #include "xdr.h" | |
42 | #include "auth.h" | |
43 | #include "clnt.h" | |
44 | #include "rpc_msg.h" | |
45 | #include "svc.h" | |
46 | #include "svc_auth.h" | |
47 | ||
48 | /* | |
49 | * svcauthsw is the bdevsw of server side authentication. | |
50 | * | |
51 | * Server side authenticators are called from authenticate by | |
52 | * using the client auth struct flavor field to index into svcauthsw. | |
53 | * The server auth flavors must implement a routine that looks | |
54 | * like: | |
55 | * | |
56 | * enum auth_stat | |
57 | * flavorx_auth(rqst, msg) | |
58 | * register struct svc_req *rqst; | |
59 | * register struct rpc_msg *msg; | |
60 | * | |
61 | */ | |
62 | ||
63 | enum auth_stat _svcauth_null(); /* no authentication */ | |
64 | enum auth_stat _svcauth_unix(); /* unix style (uid, gids) */ | |
65 | enum auth_stat _svcauth_short(); /* short hand unix style */ | |
66 | ||
67 | static struct { | |
68 | enum auth_stat (*authenticator)(); | |
69 | } svcauthsw[] = { | |
70 | _svcauth_null, /* AUTH_NULL */ | |
71 | _svcauth_unix, /* AUTH_UNIX */ | |
72 | _svcauth_short /* AUTH_SHORT */ | |
73 | }; | |
74 | #define AUTH_MAX 2 /* HIGHEST AUTH NUMBER */ | |
75 | ||
76 | ||
77 | /* | |
78 | * The call rpc message, msg has been obtained from the wire. The msg contains | |
79 | * the raw form of credentials and verifiers. authenticate returns AUTH_OK | |
80 | * if the msg is successfully authenticated. If AUTH_OK then the routine also | |
81 | * does the following things: | |
82 | * set rqst->rq_xprt->verf to the appropriate response verifier; | |
83 | * sets rqst->rq_client_cred to the "cooked" form of the credentials. | |
84 | * | |
85 | * NB: rqst->rq_cxprt->verf must be pre-alloctaed; | |
86 | * its length is set appropriately. | |
87 | * | |
88 | * The caller still owns and is responsible for msg->u.cmb.cred and | |
89 | * msg->u.cmb.verf. The authentication system retains ownership of | |
90 | * rqst->rq_client_cred, the cooked credentials. | |
91 | */ | |
92 | enum auth_stat | |
93 | _authenticate(rqst, msg) | |
94 | register struct svc_req *rqst; | |
95 | struct rpc_msg *msg; | |
96 | { | |
97 | register int cred_flavor; | |
98 | ||
99 | rqst->rq_cred = msg->rm_call.cb_cred; | |
100 | rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; | |
101 | rqst->rq_xprt->xp_verf.oa_length = 0; | |
102 | rqst->rq_clntcred = (caddr_t)AUTH_NULL; | |
103 | cred_flavor = rqst->rq_cred.oa_flavor; | |
104 | if (cred_flavor <= AUTH_MAX) { | |
105 | return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg)); | |
106 | } | |
107 | ||
108 | return (AUTH_REJECTEDCRED); | |
109 | } | |
110 | ||
111 | enum auth_stat | |
112 | _svcauth_null(/*rqst, msg*/) | |
113 | /*struct svc_req *rqst; | |
114 | struct rpc_msg *msg;*/ | |
115 | { | |
116 | ||
117 | return (AUTH_OK); | |
118 | } |