1 /* $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $ */
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35 #if defined(LIBC_SCCS) && !defined(lint)
36 #ident "@(#)svc_auth.c 1.16 94/04/24 SMI"
37 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
43 * svc_auth.c, Server-side rpc authenticator interface.
47 #include "namespace.h"
48 #include "reentrant.h"
49 #include <sys/types.h>
52 #include "un-namespace.h"
56 * svcauthsw is the bdevsw of server side authentication.
58 * Server side authenticators are called from authenticate by
59 * using the client auth struct flavor field to index into svcauthsw.
60 * The server auth flavors must implement a routine that looks
64 * flavorx_auth(rqst, msg)
65 * struct svc_req *rqst;
66 * struct rpc_msg *msg;
70 /* declarations to allow servers to specify new authentication flavors */
73 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *);
76 static struct authsvc *Auths = NULL;
78 struct svc_auth_ops svc_auth_null_ops;
81 * The call rpc message, msg has been obtained from the wire. The msg contains
82 * the raw form of credentials and verifiers. authenticate returns AUTH_OK
83 * if the msg is successfully authenticated. If AUTH_OK then the routine also
84 * does the following things:
85 * set rqst->rq_xprt->verf to the appropriate response verifier;
86 * sets rqst->rq_client_cred to the "cooked" form of the credentials.
88 * NB: rqst->rq_cxprt->verf must be pre-alloctaed;
89 * its length is set appropriately.
91 * The caller still owns and is responsible for msg->u.cmb.cred and
92 * msg->u.cmb.verf. The authentication system retains ownership of
93 * rqst->rq_client_cred, the cooked credentials.
95 * There is an assumption that any flavour less than AUTH_NULL is
99 _authenticate(rqst, msg)
100 struct svc_req *rqst;
105 enum auth_stat dummy;
107 /* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */
109 rqst->rq_cred = msg->rm_call.cb_cred;
110 SVC_AUTH(rqst->rq_xprt).svc_ah_ops = &svc_auth_null_ops;
111 SVC_AUTH(rqst->rq_xprt).svc_ah_private = NULL;
112 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
113 rqst->rq_xprt->xp_verf.oa_length = 0;
114 cred_flavor = rqst->rq_cred.oa_flavor;
115 switch (cred_flavor) {
117 dummy = _svcauth_null(rqst, msg);
120 dummy = _svcauth_unix(rqst, msg);
123 dummy = _svcauth_short(rqst, msg);
127 dummy = _svcauth_des(rqst, msg);
134 /* flavor doesn't match any of the builtin types, so try new ones */
135 mutex_lock(&authsvc_lock);
136 for (asp = Auths; asp; asp = asp->next) {
137 if (asp->flavor == cred_flavor) {
140 as = (*asp->handler)(rqst, msg);
141 mutex_unlock(&authsvc_lock);
145 mutex_unlock(&authsvc_lock);
147 return (AUTH_REJECTEDCRED);
151 * A set of null auth methods used by any authentication protocols
152 * that don't need to inspect or modify the message body.
155 svcauth_null_wrap(auth, xdrs, xdr_func, xdr_ptr)
162 return (xdr_func(xdrs, xdr_ptr));
165 struct svc_auth_ops svc_auth_null_ops = {
172 _svcauth_null(rqst, msg)
173 struct svc_req *rqst;
180 * Allow the rpc service to register new authentication types that it is
181 * prepared to handle. When an authentication flavor is registered,
182 * the flavor is checked against already registered values. If not
183 * registered, then a new Auths entry is added on the list.
185 * There is no provision to delete a registration once registered.
187 * This routine returns:
188 * 0 if registration successful
189 * 1 if flavor already registered
190 * -1 if can't register (errno set)
194 svc_auth_reg(cred_flavor, handler)
196 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *);
200 switch (cred_flavor) {
207 /* already registered */
211 mutex_lock(&authsvc_lock);
212 for (asp = Auths; asp; asp = asp->next) {
213 if (asp->flavor == cred_flavor) {
214 /* already registered */
215 mutex_unlock(&authsvc_lock);
220 /* this is a new one, so go ahead and register it */
221 asp = mem_alloc(sizeof (*asp));
223 mutex_unlock(&authsvc_lock);
226 asp->flavor = cred_flavor;
227 asp->handler = handler;
230 mutex_unlock(&authsvc_lock);