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/*

 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for

 * unrestricted use provided that this legend is included on all tape

 * media and as a part of the software program in whole or part.  Users

 * may copy or modify Sun RPC without charge, but are not authorized

 * to license or distribute it to anyone else except as part of a product or

 * program developed by the user.

 *

 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE

 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.

 *

 * Sun RPC is provided with no support and without any obligation on the

 * part of Sun Microsystems, Inc. to assist in its use, correction,

 * modification or enhancement.

 *

 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE

 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC

 * OR ANY PART THEREOF.

 *

 * In no event will Sun Microsystems, Inc. be liable for any lost revenue

 * or profits or other special, indirect and consequential damages, even if

 * Sun has been advised of the possibility of such damages.

 *

 * Sun Microsystems, Inc.

 * 2550 Garcia Avenue

 * Mountain View, California  94043

 */

#if defined(LIBC_SCCS) && !defined(lint)

/*static char *sccsid = "from: @(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";*/

/*static char *sccsid = "from: @(#)svc_auth_unix.c      2.3 88/08/01 4.0 RPCSRC";*/

static char *rcsid = "$FreeBSD: src/lib/libc/rpc/svc_auth_unix.c,v 1.8 1999/08/28 00:00:49 peter Exp $";

#endif

/*

 * svc_auth_unix.c

 * Handles UNIX flavor authentication parameters on the service side of rpc.

 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.

 * _svcauth_unix does full blown unix style uid,gid+gids auth,

 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.

 * Note: the shorthand has been gutted for efficiency.

 *

 * Copyright (C) 1984, Sun Microsystems, Inc.

 */

#include <stdio.h>

#include <string.h>

#include <rpc/rpc.h>

/*

 * Unix longhand authenticator

 */

enum auth_stat

_svcauth_unix(rqst, msg)

        register struct svc_req *rqst;

        register struct rpc_msg *msg;

{

        register enum auth_stat stat;

        XDR xdrs;

        register struct authunix_parms *aup;

        register int32_t *buf;

        struct area {

                struct authunix_parms area_aup;

                char area_machname[MAX_MACHINE_NAME+1];

                int area_gids[NGRPS];

        } *area;

        u_int auth_len;

        int str_len, gid_len;

        register int i;

        area = (struct area *) rqst->rq_clntcred;

        aup = &area->area_aup;

        aup->aup_machname = area->area_machname;

        aup->aup_gids = area->area_gids;

        auth_len = (u_int)msg->rm_call.cb_cred.oa_length;

        xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE);

        buf = XDR_INLINE(&xdrs, auth_len);

        if (buf != NULL) {

                aup->aup_time = IXDR_GET_LONG(buf);

                str_len = IXDR_GET_U_LONG(buf);

                if (str_len > MAX_MACHINE_NAME) {

                        stat = AUTH_BADCRED;

                        goto done;

                }

                memcpy(aup->aup_machname, (caddr_t)buf, (u_int)str_len);

                aup->aup_machname[str_len] = 0;

                str_len = RNDUP(str_len);

                buf += str_len / sizeof (int32_t);

                aup->aup_uid = IXDR_GET_LONG(buf);

                aup->aup_gid = IXDR_GET_LONG(buf);

                gid_len = IXDR_GET_U_LONG(buf);

                if (gid_len > NGRPS) {

                        stat = AUTH_BADCRED;

                        goto done;

                }

                aup->aup_len = gid_len;

                for (i = 0; i < gid_len; i++) {

                        aup->aup_gids[i] = IXDR_GET_LONG(buf);

                }

                /*

                 * five is the smallest unix credentials structure -

                 * timestamp, hostname len (0), uid, gid, and gids len (0).

                 */

                if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {

                        (void) printf("bad auth_len gid %d str %d auth %d\n",

                            gid_len, str_len, auth_len);

                        stat = AUTH_BADCRED;

                        goto done;

                }

        } else if (! xdr_authunix_parms(&xdrs, aup)) {

                xdrs.x_op = XDR_FREE;

                (void)xdr_authunix_parms(&xdrs, aup);

                stat = AUTH_BADCRED;

                goto done;

        }

        /* get the verifier */

        if ((u_int)msg->rm_call.cb_verf.oa_length) {

                rqst->rq_xprt->xp_verf.oa_flavor =

                        msg->rm_call.cb_verf.oa_flavor;

                rqst->rq_xprt->xp_verf.oa_base =

                        msg->rm_call.cb_verf.oa_base;

                rqst->rq_xprt->xp_verf.oa_length =

                        msg->rm_call.cb_verf.oa_length;

        } else {

                rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;

                rqst->rq_xprt->xp_verf.oa_length = 0;

        }

        stat = AUTH_OK;

done:

        XDR_DESTROY(&xdrs);

        return (stat);

}

/*

 * Shorthand unix authenticator

 * Looks up longhand in a cache.

 */

/*ARGSUSED*/

enum auth_stat

_svcauth_short(rqst, msg)

        struct svc_req *rqst;

        struct rpc_msg *msg;

{

        return (AUTH_REJECTEDCRED);

}