116 lines
4.2 KiB
C
116 lines
4.2 KiB
C
|
/*
|
||
|
|
* svc_auth.c, Server-side rpc authenticator interface.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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>
|
||
|
|
#include <shlib-compat.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;
|
||
|
|
}
|
||
|
|
libc_hidden_nolink_sunrpc (_authenticate, GLIBC_2_1)
|
||
|
|
|
||
|
|
static enum auth_stat
|
||
|
|
_svcauth_null (struct svc_req *rqst, struct rpc_msg *msg)
|
||
|
|
{
|
||
|
|
return AUTH_OK;
|
||
|
|
}
|