1 /* $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $ */
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31 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 #if defined(LIBC_SCCS) && !defined(lint)
35 #ident "@(#)svc_auth.c 1.16 94/04/24 SMI"
36 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * svc_auth.c, Server-side rpc authenticator interface.
46 #include "namespace.h"
47 #include "reentrant.h"
48 #include <sys/types.h>
51 #include "un-namespace.h"
55 * svcauthsw is the bdevsw of server side authentication.
57 * Server side authenticators are called from authenticate by
58 * using the client auth struct flavor field to index into svcauthsw.
59 * The server auth flavors must implement a routine that looks
63 * flavorx_auth(rqst, msg)
64 * struct svc_req *rqst;
65 * struct rpc_msg *msg;
69 /* declarations to allow servers to specify new authentication flavors */
72 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *);
75 static struct authsvc *Auths = NULL;
77 struct svc_auth_ops svc_auth_null_ops;
80 * The call rpc message, msg has been obtained from the wire. The msg contains
81 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
82 * if the msg is successfully authenticated. If AUTH_OK then the routine also
83 * does the following things:
84 * set rqst->rq_xprt->verf to the appropriate response verifier;
85 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
87 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
88 * its length is set appropriately.
90 * The caller still owns and is responsible for msg->u.cmb.cred and
91 * msg->u.cmb.verf. The authentication system retains ownership of
92 * rqst->rq_client_cred, the cooked credentials.
94 * There is an assumption that any flavour less than AUTH_NULL is
98 _authenticate(rqst, msg)
104 enum auth_stat dummy;
106 /* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */
108 rqst->rq_cred = msg->rm_call.cb_cred;
109 SVC_AUTH(rqst->rq_xprt).svc_ah_ops = &svc_auth_null_ops;
110 SVC_AUTH(rqst->rq_xprt).svc_ah_private = NULL;
111 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
112 rqst->rq_xprt->xp_verf.oa_length = 0;
113 cred_flavor = rqst->rq_cred.oa_flavor;
114 switch (cred_flavor) {
116 dummy = _svcauth_null(rqst, msg);
119 dummy = _svcauth_unix(rqst, msg);
122 dummy = _svcauth_short(rqst, msg);
126 dummy = _svcauth_des(rqst, msg);
133 /* flavor doesn't match any of the builtin types, so try new ones */
134 mutex_lock(&authsvc_lock);
135 for (asp = Auths; asp; asp = asp->next) {
136 if (asp->flavor == cred_flavor) {
139 as = (*asp->handler)(rqst, msg);
140 mutex_unlock(&authsvc_lock);
144 mutex_unlock(&authsvc_lock);
146 return (AUTH_REJECTEDCRED);
150 * A set of null auth methods used by any authentication protocols
151 * that don't need to inspect or modify the message body.
154 svcauth_null_wrap(auth, xdrs, xdr_func, xdr_ptr)
161 return (xdr_func(xdrs, xdr_ptr));
164 struct svc_auth_ops svc_auth_null_ops = {
171 _svcauth_null(rqst, msg)
172 struct svc_req *rqst;
179 * Allow the rpc service to register new authentication types that it is
180 * prepared to handle. When an authentication flavor is registered,
181 * the flavor is checked against already registered values. If not
182 * registered, then a new Auths entry is added on the list.
184 * There is no provision to delete a registration once registered.
186 * This routine returns:
187 * 0 if registration successful
188 * 1 if flavor already registered
189 * -1 if can't register (errno set)
193 svc_auth_reg(cred_flavor, handler)
195 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *);
199 switch (cred_flavor) {
206 /* already registered */
210 mutex_lock(&authsvc_lock);
211 for (asp = Auths; asp; asp = asp->next) {
212 if (asp->flavor == cred_flavor) {
213 /* already registered */
214 mutex_unlock(&authsvc_lock);
219 /* this is a new one, so go ahead and register it */
220 asp = mem_alloc(sizeof (*asp));
222 mutex_unlock(&authsvc_lock);
225 asp->flavor = cred_flavor;
226 asp->handler = handler;
229 mutex_unlock(&authsvc_lock);