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33 #ident "@(#)svc_auth.c 1.16 94/04/24 SMI"
35 #if !defined(lint) && defined(SCCSIDS)
37 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
39 static const char rcsid[] =
40 "$FreeBSD: src/lib/libc/rpc/svc_auth.c,v 1.7 1999/12/29 05:04:16 peter Exp $";
45 * svc_auth.c, Server-side rpc authenticator interface.
50 #include <sys/param.h>
51 #include <rpc/types.h>
55 #include <rpc/rpc_msg.h>
57 #include <rpc/svc_auth.h>
62 #include <sys/types.h>
65 * svcauthsw is the bdevsw of server side authentication.
67 * Server side authenticators are called from authenticate by
68 * using the client auth struct flavor field to index into svcauthsw.
69 * The server auth flavors must implement a routine that looks
73 * flavorx_auth(rqst, msg)
74 * register struct svc_req *rqst;
75 * register struct rpc_msg *msg;
79 enum auth_stat _svcauth_null(); /* no authentication */
80 enum auth_stat _svcauth_unix(); /* (system) unix style (uid, gids) */
81 enum auth_stat _svcauth_short(); /* short hand unix style */
82 enum auth_stat _svcauth_des(); /* des style */
84 /* declarations to allow servers to specify new authentication flavors */
87 enum auth_stat (*handler)();
90 static struct authsvc *Auths = NULL;
93 * The call rpc message, msg has been obtained from the wire. The msg contains
94 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
95 * if the msg is successfully authenticated. If AUTH_OK then the routine also
96 * does the following things:
97 * set rqst->rq_xprt->verf to the appropriate response verifier;
98 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
100 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
101 * its length is set appropriately.
103 * The caller still owns and is responsible for msg->u.cmb.cred and
104 * msg->u.cmb.verf. The authentication system retains ownership of
105 * rqst->rq_client_cred, the cooked credentials.
107 * There is an assumption that any flavour less than AUTH_NULL is
111 _authenticate(rqst, msg)
112 register struct svc_req *rqst;
115 register int cred_flavor;
116 register struct authsvc *asp;
118 rqst->rq_cred = msg->rm_call.cb_cred;
119 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
120 rqst->rq_xprt->xp_verf.oa_length = 0;
121 cred_flavor = rqst->rq_cred.oa_flavor;
122 switch (cred_flavor) {
124 return(_svcauth_null(rqst, msg));
126 return(_svcauth_unix(rqst, msg));
128 return(_svcauth_short(rqst, msg));
130 * We leave AUTH_DES turned off by default because svcauth_des()
131 * needs getpublickey(), which is in librpcsvc, not libc. If we
132 * included AUTH_DES as a built-in flavor, programs that don't
133 * have -lrpcsvc in their Makefiles wouldn't link correctly, even
134 * though they don't use AUTH_DES. And I'm too lazy to go through
135 * the tree looking for all of them.
139 return(_svcauth_des(rqst, msg));
143 /* flavor doesn't match any of the builtin types, so try new ones */
144 for (asp = Auths; asp; asp = asp->next) {
145 if (asp->flavor == cred_flavor) {
148 as = (*asp->handler)(rqst, msg);
153 return (AUTH_REJECTEDCRED);
158 _svcauth_null(rqst, msg)
159 struct svc_req *rqst;
166 * Allow the rpc service to register new authentication types that it is
167 * prepared to handle. When an authentication flavor is registered,
168 * the flavor is checked against already registered values. If not
169 * registered, then a new Auths entry is added on the list.
171 * There is no provision to delete a registration once registered.
173 * This routine returns:
174 * 0 if registration successful
175 * 1 if flavor already registered
176 * -1 if can't register (errno set)
180 svc_auth_reg(cred_flavor, handler)
181 register int cred_flavor;
182 enum auth_stat (*handler)();
184 register struct authsvc *asp;
186 switch (cred_flavor) {
193 /* already registered */
197 for (asp = Auths; asp; asp = asp->next) {
198 if (asp->flavor == cred_flavor) {
199 /* already registered */
204 /* this is a new one, so go ahead and register it */
205 asp = (struct authsvc *)mem_alloc(sizeof (*asp));
209 asp->flavor = cred_flavor;
210 asp->handler = handler;