143 lines
4.3 KiB
C
143 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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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 met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, 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 "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* svc_auth_unix.c
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* Handles UNIX flavor authentication parameters on the service side of rpc.
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* There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
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* _svcauth_unix does full blown unix style uid,gid+gids auth,
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* _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
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* Note: the shorthand has been gutted for efficiency.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <sys/ucred.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#define MAX_MACHINE_NAME 255
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#define NGRPS 16
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/*
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* Unix longhand authenticator
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*/
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enum auth_stat
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_svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg)
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{
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enum auth_stat stat;
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XDR xdrs;
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int32_t *buf;
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uint32_t time;
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struct xucred *xcr;
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u_int auth_len;
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size_t str_len, gid_len;
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u_int i;
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xcr = rqst->rq_clntcred;
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auth_len = (u_int)msg->rm_call.cb_cred.oa_length;
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xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,
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XDR_DECODE);
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buf = XDR_INLINE(&xdrs, auth_len);
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if (buf != NULL) {
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time = IXDR_GET_UINT32(buf);
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str_len = (size_t)IXDR_GET_UINT32(buf);
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if (str_len > MAX_MACHINE_NAME) {
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stat = AUTH_BADCRED;
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goto done;
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}
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str_len = RNDUP(str_len);
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buf += str_len / sizeof (int32_t);
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xcr->cr_uid = IXDR_GET_UINT32(buf);
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xcr->cr_groups[0] = IXDR_GET_UINT32(buf);
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gid_len = (size_t)IXDR_GET_UINT32(buf);
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if (gid_len > NGRPS) {
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stat = AUTH_BADCRED;
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goto done;
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}
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for (i = 0; i < gid_len; i++) {
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if (i + 1 < XU_NGROUPS)
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xcr->cr_groups[i + 1] = IXDR_GET_INT32(buf);
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else
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buf++;
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}
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if (gid_len + 1 > XU_NGROUPS)
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xcr->cr_ngroups = XU_NGROUPS;
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else
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xcr->cr_ngroups = gid_len + 1;
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/*
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* five is the smallest unix credentials structure -
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* timestamp, hostname len (0), uid, gid, and gids len (0).
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*/
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if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {
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(void) printf("bad auth_len gid %ld str %ld auth %u\n",
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(long)gid_len, (long)str_len, auth_len);
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stat = AUTH_BADCRED;
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goto done;
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}
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} else if (! xdr_authunix_parms(&xdrs, &time, xcr)) {
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stat = AUTH_BADCRED;
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goto done;
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}
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rqst->rq_verf = _null_auth;
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stat = AUTH_OK;
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done:
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XDR_DESTROY(&xdrs);
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return (stat);
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}
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/*
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* Shorthand unix authenticator
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* Looks up longhand in a cache.
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*/
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/*ARGSUSED*/
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enum auth_stat
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_svcauth_short(struct svc_req *rqst, struct rpc_msg *msg)
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{
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return (AUTH_REJECTEDCRED);
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}
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