1177633Sdfr/* $NetBSD: authunix_prot.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $ */ 2177633Sdfr 3258578Shrs/*- 4258578Shrs * Copyright (c) 2009, Sun Microsystems, Inc. 5258578Shrs * All rights reserved. 6177633Sdfr * 7258578Shrs * Redistribution and use in source and binary forms, with or without 8258578Shrs * modification, are permitted provided that the following conditions are met: 9258578Shrs * - Redistributions of source code must retain the above copyright notice, 10258578Shrs * this list of conditions and the following disclaimer. 11258578Shrs * - Redistributions in binary form must reproduce the above copyright notice, 12258578Shrs * this list of conditions and the following disclaimer in the documentation 13258578Shrs * and/or other materials provided with the distribution. 14258578Shrs * - Neither the name of Sun Microsystems, Inc. nor the names of its 15258578Shrs * contributors may be used to endorse or promote products derived 16258578Shrs * from this software without specific prior written permission. 17258578Shrs * 18258578Shrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19258578Shrs * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20258578Shrs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21258578Shrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22258578Shrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23258578Shrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24258578Shrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25258578Shrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26258578Shrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27258578Shrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28258578Shrs * POSSIBILITY OF SUCH DAMAGE. 29177633Sdfr */ 30177633Sdfr 31177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 32177633Sdfrstatic char *sccsid2 = "@(#)authunix_prot.c 1.15 87/08/11 Copyr 1984 Sun Micro"; 33177633Sdfrstatic char *sccsid = "@(#)authunix_prot.c 2.1 88/07/29 4.0 RPCSRC"; 34177633Sdfr#endif 35177633Sdfr#include <sys/cdefs.h> 36177633Sdfr__FBSDID("$FreeBSD$"); 37177633Sdfr 38177633Sdfr/* 39177633Sdfr * authunix_prot.c 40177633Sdfr * XDR for UNIX style authentication parameters for RPC 41177633Sdfr * 42177633Sdfr * Copyright (C) 1984, Sun Microsystems, Inc. 43177633Sdfr */ 44177633Sdfr 45177633Sdfr#include <sys/param.h> 46193066Sjamie#include <sys/jail.h> 47177633Sdfr#include <sys/kernel.h> 48177633Sdfr#include <sys/systm.h> 49177633Sdfr#include <sys/ucred.h> 50177633Sdfr 51177633Sdfr#include <rpc/types.h> 52177633Sdfr#include <rpc/xdr.h> 53177633Sdfr#include <rpc/auth.h> 54177633Sdfr 55177685Sdfr#include <rpc/rpc_com.h> 56177633Sdfr 57177633Sdfr/* gids compose part of a credential; there may not be more than 16 of them */ 58177633Sdfr#define NGRPS 16 59177633Sdfr 60177633Sdfr/* 61177633Sdfr * XDR for unix authentication parameters. 62177633Sdfr */ 63177633Sdfrbool_t 64177633Sdfrxdr_authunix_parms(XDR *xdrs, uint32_t *time, struct xucred *cred) 65177633Sdfr{ 66177633Sdfr uint32_t namelen; 67177633Sdfr uint32_t ngroups, i; 68177633Sdfr uint32_t junk; 69193066Sjamie char hostbuf[MAXHOSTNAMELEN]; 70177633Sdfr 71177633Sdfr if (xdrs->x_op == XDR_ENCODE) { 72180025Sdfr /* 73180025Sdfr * Restrict name length to 255 according to RFC 1057. 74180025Sdfr */ 75193066Sjamie getcredhostname(NULL, hostbuf, sizeof(hostbuf)); 76193066Sjamie namelen = strlen(hostbuf); 77180025Sdfr if (namelen > 255) 78180025Sdfr namelen = 255; 79177633Sdfr } else { 80177633Sdfr namelen = 0; 81177633Sdfr } 82177633Sdfr junk = 0; 83177633Sdfr 84177633Sdfr if (!xdr_uint32_t(xdrs, time) 85177633Sdfr || !xdr_uint32_t(xdrs, &namelen)) 86177633Sdfr return (FALSE); 87177633Sdfr 88177633Sdfr /* 89177633Sdfr * Ignore the hostname on decode. 90177633Sdfr */ 91177633Sdfr if (xdrs->x_op == XDR_ENCODE) { 92193066Sjamie if (!xdr_opaque(xdrs, hostbuf, namelen)) 93177633Sdfr return (FALSE); 94177633Sdfr } else { 95177633Sdfr xdr_setpos(xdrs, xdr_getpos(xdrs) + RNDUP(namelen)); 96177633Sdfr } 97177633Sdfr 98177633Sdfr if (!xdr_uint32_t(xdrs, &cred->cr_uid)) 99177633Sdfr return (FALSE); 100177633Sdfr if (!xdr_uint32_t(xdrs, &cred->cr_groups[0])) 101177633Sdfr return (FALSE); 102177633Sdfr 103177633Sdfr if (xdrs->x_op == XDR_ENCODE) { 104177633Sdfr ngroups = cred->cr_ngroups - 1; 105177633Sdfr if (ngroups > NGRPS) 106177633Sdfr ngroups = NGRPS; 107177633Sdfr } 108177633Sdfr 109177633Sdfr if (!xdr_uint32_t(xdrs, &ngroups)) 110177633Sdfr return (FALSE); 111177633Sdfr for (i = 0; i < ngroups; i++) { 112202143Sbrooks if (i + 1 < ngroups_max + 1) { 113177633Sdfr if (!xdr_uint32_t(xdrs, &cred->cr_groups[i + 1])) 114177633Sdfr return (FALSE); 115177633Sdfr } else { 116177633Sdfr if (!xdr_uint32_t(xdrs, &junk)) 117177633Sdfr return (FALSE); 118177633Sdfr } 119177633Sdfr } 120177633Sdfr 121177633Sdfr if (xdrs->x_op == XDR_DECODE) { 122202143Sbrooks if (ngroups + 1 > ngroups_max + 1) 123202143Sbrooks cred->cr_ngroups = ngroups_max + 1; 124177633Sdfr else 125177633Sdfr cred->cr_ngroups = ngroups + 1; 126177633Sdfr } 127177633Sdfr 128177633Sdfr return (TRUE); 129177633Sdfr} 130