/* * svc_auth.c, Server-side rpc authenticator interface. * * Copyright (C) 1984, Sun Microsystems, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * Neither the name of Sun Microsystems, Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <rpc/rpc.h> #include <rpc/svc.h> #include <rpc/svc_auth.h> /* * svcauthsw is the bdevsw of server side authentication. * * Server side authenticators are called from authenticate by * using the client auth struct flavor field to index into svcauthsw. * The server auth flavors must implement a routine that looks * like: * * enum auth_stat * flavorx_auth(rqst, msg) * register struct svc_req *rqst; * register struct rpc_msg *msg; * */ static enum auth_stat _svcauth_null (struct svc_req *, struct rpc_msg *); /* no authentication */ extern enum auth_stat _svcauth_unix (struct svc_req *, struct rpc_msg *); /* unix style (uid, gids) */ extern enum auth_stat _svcauth_short (struct svc_req *, struct rpc_msg *); /* short hand unix style */ extern enum auth_stat _svcauth_des (struct svc_req *, struct rpc_msg *); /* des style */ static const struct { enum auth_stat (*authenticator) (struct svc_req *, struct rpc_msg *); } svcauthsw[] = { { _svcauth_null }, /* AUTH_NULL */ { _svcauth_unix }, /* AUTH_UNIX */ { _svcauth_short }, /* AUTH_SHORT */ { _svcauth_des } /* AUTH_DES */ }; #define AUTH_MAX 3 /* HIGHEST AUTH NUMBER */ /* * The call rpc message, msg has been obtained from the wire. The msg contains * the raw form of credentials and verifiers. authenticate returns AUTH_OK * if the msg is successfully authenticated. If AUTH_OK then the routine also * does the following things: * set rqst->rq_xprt->verf to the appropriate response verifier; * sets rqst->rq_client_cred to the "cooked" form of the credentials. * * NB: rqst->rq_cxprt->verf must be pre-allocated; * its length is set appropriately. * * The caller still owns and is responsible for msg->u.cmb.cred and * msg->u.cmb.verf. The authentication system retains ownership of * rqst->rq_client_cred, the cooked credentials. * * There is an assumption that any flavour less than AUTH_NULL is * invalid. */ enum auth_stat _authenticate (register struct svc_req *rqst, struct rpc_msg *msg) { register int cred_flavor; rqst->rq_cred = msg->rm_call.cb_cred; rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; rqst->rq_xprt->xp_verf.oa_length = 0; cred_flavor = rqst->rq_cred.oa_flavor; if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) return (*(svcauthsw[cred_flavor].authenticator)) (rqst, msg); return AUTH_REJECTEDCRED; } INTDEF(_authenticate) static enum auth_stat _svcauth_null (struct svc_req *rqst, struct rpc_msg *msg) { return AUTH_OK; }