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/*-
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";
static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* 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 <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <sys/ucred.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#define MAX_MACHINE_NAME 255
#define NGRPS 16
/*
* Unix longhand authenticator
*/
enum auth_stat
_svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg)
{
enum auth_stat stat;
XDR xdrs;
int32_t *buf;
uint32_t time;
struct xucred *xcr;
u_int auth_len;
size_t str_len, gid_len;
u_int i;
xcr = rqst->rq_clntcred;
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) {
time = IXDR_GET_UINT32(buf);
str_len = (size_t)IXDR_GET_UINT32(buf);
if (str_len > MAX_MACHINE_NAME) {
stat = AUTH_BADCRED;
goto done;
}
str_len = RNDUP(str_len);
buf += str_len / sizeof (int32_t);
xcr->cr_uid = IXDR_GET_UINT32(buf);
xcr->cr_groups[0] = IXDR_GET_UINT32(buf);
gid_len = (size_t)IXDR_GET_UINT32(buf);
if (gid_len > NGRPS) {
stat = AUTH_BADCRED;
goto done;
}
for (i = 0; i < gid_len; i++) {
if (i + 1 < XU_NGROUPS)
xcr->cr_groups[i + 1] = IXDR_GET_INT32(buf);
else
buf++;
}
if (gid_len + 1 > XU_NGROUPS)
xcr->cr_ngroups = XU_NGROUPS;
else
xcr->cr_ngroups = gid_len + 1;
/*
* 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 %ld str %ld auth %u\n",
(long)gid_len, (long)str_len, auth_len);
stat = AUTH_BADCRED;
goto done;
}
} else if (! xdr_authunix_parms(&xdrs, &time, xcr)) {
stat = AUTH_BADCRED;
goto done;
}
rqst->rq_verf = _null_auth;
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);
}
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