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29 * @(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro
30 * $FreeBSD: src/lib/libc/rpc/svc_auth.c,v 1.7 1999/12/29 05:04:16 peter Exp $
31 * $DragonFly: src/lib/libcr/rpc/Attic/svc_auth.c,v 1.3 2004/10/25 19:38:25 drhodus Exp $
34 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
37 #ident "@(#)svc_auth.c 1.16 94/04/24 SMI"
40 * svc_auth.c, Server-side rpc authenticator interface.
45 #include <sys/param.h>
46 #include <rpc/types.h>
50 #include <rpc/rpc_msg.h>
52 #include <rpc/svc_auth.h>
57 #include <sys/types.h>
60 * svcauthsw is the bdevsw of server side authentication.
62 * Server side authenticators are called from authenticate by
63 * using the client auth struct flavor field to index into svcauthsw.
64 * The server auth flavors must implement a routine that looks
68 * flavorx_auth(rqst, msg)
69 * struct svc_req *rqst;
70 * struct rpc_msg *msg;
74 enum auth_stat _svcauth_null(); /* no authentication */
75 enum auth_stat _svcauth_unix(); /* (system) unix style (uid, gids) */
76 enum auth_stat _svcauth_short(); /* short hand unix style */
77 enum auth_stat _svcauth_des(); /* des style */
79 /* declarations to allow servers to specify new authentication flavors */
82 enum auth_stat (*handler)();
85 static struct authsvc *Auths = NULL;
88 * The call rpc message, msg has been obtained from the wire. The msg contains
89 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
90 * if the msg is successfully authenticated. If AUTH_OK then the routine also
91 * does the following things:
92 * set rqst->rq_xprt->verf to the appropriate response verifier;
93 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
95 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
96 * its length is set appropriately.
98 * The caller still owns and is responsible for msg->u.cmb.cred and
99 * msg->u.cmb.verf. The authentication system retains ownership of
100 * rqst->rq_client_cred, the cooked credentials.
102 * There is an assumption that any flavour less than AUTH_NULL is
106 _authenticate(rqst, msg)
107 struct svc_req *rqst;
113 rqst->rq_cred = msg->rm_call.cb_cred;
114 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
115 rqst->rq_xprt->xp_verf.oa_length = 0;
116 cred_flavor = rqst->rq_cred.oa_flavor;
117 switch (cred_flavor) {
119 return(_svcauth_null(rqst, msg));
121 return(_svcauth_unix(rqst, msg));
123 return(_svcauth_short(rqst, msg));
125 * We leave AUTH_DES turned off by default because svcauth_des()
126 * needs getpublickey(), which is in librpcsvc, not libc. If we
127 * included AUTH_DES as a built-in flavor, programs that don't
128 * have -lrpcsvc in their Makefiles wouldn't link correctly, even
129 * though they don't use AUTH_DES. And I'm too lazy to go through
130 * the tree looking for all of them.
134 return(_svcauth_des(rqst, msg));
138 /* flavor doesn't match any of the builtin types, so try new ones */
139 for (asp = Auths; asp; asp = asp->next) {
140 if (asp->flavor == cred_flavor) {
143 as = (*asp->handler)(rqst, msg);
148 return (AUTH_REJECTEDCRED);
153 _svcauth_null(rqst, msg)
154 struct svc_req *rqst;
161 * Allow the rpc service to register new authentication types that it is
162 * prepared to handle. When an authentication flavor is registered,
163 * the flavor is checked against already registered values. If not
164 * registered, then a new Auths entry is added on the list.
166 * There is no provision to delete a registration once registered.
168 * This routine returns:
169 * 0 if registration successful
170 * 1 if flavor already registered
171 * -1 if can't register (errno set)
175 svc_auth_reg(cred_flavor, handler)
177 enum auth_stat (*handler)();
181 switch (cred_flavor) {
188 /* already registered */
192 for (asp = Auths; asp; asp = asp->next) {
193 if (asp->flavor == cred_flavor) {
194 /* already registered */
199 /* this is a new one, so go ahead and register it */
200 asp = (struct authsvc *)mem_alloc(sizeof (*asp));
204 asp->flavor = cred_flavor;
205 asp->handler = handler;