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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Copyright 2017 Joyent Inc
* Use is subject to license terms.
*/
/*
* Handles the loopback UNIX flavor authentication parameters on the
* service side of rpc.
*/
#include "mt.h"
#include <stdio.h>
#include <rpc/rpc.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/debug.h>
/*
* NOTE: this has to fit inside RQCRED_SIZE bytes. If you update this struct,
* double-check it still fits.
*/
struct authlpbk_area {
struct authsys_parms area_aup;
char area_machname[MAX_MACHINE_NAME+1];
gid_t area_gids[NGRPS_LOOPBACK];
};
CTASSERT(sizeof (struct authlpbk_area) <= RQCRED_SIZE);
/*
* Loopback system (Unix) longhand authenticator
*/
enum auth_stat
__svcauth_loopback(struct svc_req *rqst, struct rpc_msg *msg)
{
struct authsys_parms *aup;
int32_t *buf;
struct authlpbk_area *area;
uint_t auth_len;
uint_t str_len, gid_len;
int i;
/* LINTED pointer cast */
area = (struct authlpbk_area *)rqst->rq_clntcred;
aup = &area->area_aup;
aup->aup_machname = area->area_machname;
aup->aup_gids = area->area_gids;
auth_len = msg->rm_call.cb_cred.oa_length;
if (auth_len == 0)
return (AUTH_BADCRED);
/* LINTED pointer cast */
buf = (int32_t *)msg->rm_call.cb_cred.oa_base;
aup->aup_time = IXDR_GET_INT32(buf);
str_len = IXDR_GET_U_INT32(buf);
if (str_len > MAX_MACHINE_NAME)
return (AUTH_BADCRED);
if (str_len > auth_len)
return (AUTH_BADCRED);
(void) memcpy(aup->aup_machname, buf, str_len);
aup->aup_machname[str_len] = 0;
str_len = RNDUP(str_len);
buf += str_len / sizeof (int);
aup->aup_uid = IXDR_GET_INT32(buf);
aup->aup_gid = IXDR_GET_INT32(buf);
gid_len = IXDR_GET_U_INT32(buf);
if (gid_len > NGRPS_LOOPBACK)
return (AUTH_BADCRED);
/*
* 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)
return (AUTH_BADCRED);
aup->aup_len = gid_len;
for (i = 0; i < gid_len; i++) {
aup->aup_gids[i] = (gid_t)IXDR_GET_INT32(buf);
}
rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
rqst->rq_xprt->xp_verf.oa_length = 0;
return (AUTH_OK);
}
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