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115 lines
4.2 KiB
C
115 lines
4.2 KiB
C
/*
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* svc_auth.c, Server-side rpc authenticator interface.
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*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <rpc/rpc.h>
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#include <rpc/svc.h>
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#include <rpc/svc_auth.h>
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/*
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* svcauthsw is the bdevsw of server side authentication.
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*
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* Server side authenticators are called from authenticate by
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* using the client auth struct flavor field to index into svcauthsw.
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* The server auth flavors must implement a routine that looks
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* like:
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*
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* enum auth_stat
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* flavorx_auth(rqst, msg)
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* register struct svc_req *rqst;
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* register struct rpc_msg *msg;
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*
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*/
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static enum auth_stat _svcauth_null (struct svc_req *, struct rpc_msg *);
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/* no authentication */
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extern enum auth_stat _svcauth_unix (struct svc_req *, struct rpc_msg *);
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/* unix style (uid, gids) */
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extern enum auth_stat _svcauth_short (struct svc_req *, struct rpc_msg *);
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/* short hand unix style */
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extern enum auth_stat _svcauth_des (struct svc_req *, struct rpc_msg *);
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/* des style */
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static const struct
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{
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enum auth_stat (*authenticator) (struct svc_req *, struct rpc_msg *);
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}
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svcauthsw[] =
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{
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{ _svcauth_null }, /* AUTH_NULL */
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{ _svcauth_unix }, /* AUTH_UNIX */
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{ _svcauth_short }, /* AUTH_SHORT */
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{ _svcauth_des } /* AUTH_DES */
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};
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#define AUTH_MAX 3 /* HIGHEST AUTH NUMBER */
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/*
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* The call rpc message, msg has been obtained from the wire. The msg contains
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* the raw form of credentials and verifiers. authenticate returns AUTH_OK
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* if the msg is successfully authenticated. If AUTH_OK then the routine also
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* does the following things:
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* set rqst->rq_xprt->verf to the appropriate response verifier;
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* sets rqst->rq_client_cred to the "cooked" form of the credentials.
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*
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* NB: rqst->rq_cxprt->verf must be pre-allocated;
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* its length is set appropriately.
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*
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* The caller still owns and is responsible for msg->u.cmb.cred and
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* msg->u.cmb.verf. The authentication system retains ownership of
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* rqst->rq_client_cred, the cooked credentials.
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*
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* There is an assumption that any flavour less than AUTH_NULL is
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* invalid.
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*/
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enum auth_stat
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_authenticate (register struct svc_req *rqst, struct rpc_msg *msg)
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{
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register int cred_flavor;
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rqst->rq_cred = msg->rm_call.cb_cred;
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rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor;
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rqst->rq_xprt->xp_verf.oa_length = 0;
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cred_flavor = rqst->rq_cred.oa_flavor;
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if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL))
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return (*(svcauthsw[cred_flavor].authenticator)) (rqst, msg);
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return AUTH_REJECTEDCRED;
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}
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INTDEF(_authenticate)
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static enum auth_stat
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_svcauth_null (struct svc_req *rqst, struct rpc_msg *msg)
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{
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return AUTH_OK;
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}
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