svc_auth.c revision 261057
1133362Sobrien/* $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $ */ 2133362Sobrien 3284193Sdelphij/*- 4284193Sdelphij * Copyright (c) 2009, Sun Microsystems, Inc. 5284193Sdelphij * All rights reserved. 6284193Sdelphij * 7284193Sdelphij * Redistribution and use in source and binary forms, with or without 8284193Sdelphij * modification, are permitted provided that the following conditions are met: 9284193Sdelphij * - Redistributions of source code must retain the above copyright notice, 10284193Sdelphij * this list of conditions and the following disclaimer. 11175299Sobrien * - Redistributions in binary form must reproduce the above copyright notice, 12208341Smarius * this list of conditions and the following disclaimer in the documentation 13133362Sobrien * and/or other materials provided with the distribution. 14268515Sdelphij * - Neither the name of Sun Microsystems, Inc. nor the names of its 15268515Sdelphij * contributors may be used to endorse or promote products derived 16268515Sdelphij * from this software without specific prior written permission. 17208341Smarius * 18133362Sobrien * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19133362Sobrien * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20208341Smarius * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21133362Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22133362Sobrien * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23268515Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24268515Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25268515Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26191771Sobrien * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27191771Sobrien * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28191771Sobrien * POSSIBILITY OF SUCH DAMAGE. 29268515Sdelphij */ 30268515Sdelphij/* 31268515Sdelphij * Copyright (c) 1986-1991 by Sun Microsystems Inc. 32208341Smarius */ 33133362Sobrien 34133362Sobrien#if defined(LIBC_SCCS) && !defined(lint) 35234449Sobrien#ident "@(#)svc_auth.c 1.16 94/04/24 SMI" 36234449Sobrienstatic char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro"; 37234449Sobrien#endif 38234449Sobrien#include <sys/cdefs.h> 39234449Sobrien__FBSDID("$FreeBSD: stable/9/sys/rpc/svc_auth.c 261057 2014-01-23 00:28:17Z mav $"); 40234449Sobrien 41234449Sobrien/* 42234449Sobrien * svc_auth.c, Server-side rpc authenticator interface. 43159769Sobrien * 44159769Sobrien */ 45133362Sobrien 46191771Sobrien#include <sys/param.h> 47191771Sobrien#include <sys/lock.h> 48191771Sobrien#include <sys/mutex.h> 49133362Sobrien#include <sys/systm.h> 50133362Sobrien#include <sys/jail.h> 51133362Sobrien#include <sys/ucred.h> 52268515Sdelphij 53268515Sdelphij#include <rpc/rpc.h> 54268515Sdelphij 55234449Sobrienstatic enum auth_stat (*_svcauth_rpcsec_gss)(struct svc_req *, 56234449Sobrien struct rpc_msg *) = NULL; 57234449Sobrienstatic int (*_svcauth_rpcsec_gss_getcred)(struct svc_req *, 58284193Sdelphij struct ucred **, int *); 59284193Sdelphij 60284193Sdelphijstatic struct svc_auth_ops svc_auth_null_ops; 61284193Sdelphij 62284193Sdelphij/* 63191771Sobrien * The call rpc message, msg has been obtained from the wire. The msg contains 64191771Sobrien * the raw form of credentials and verifiers. authenticate returns AUTH_OK 65191771Sobrien * if the msg is successfully authenticated. If AUTH_OK then the routine also 66234449Sobrien * does the following things: 67234449Sobrien * set rqst->rq_xprt->verf to the appropriate response verifier; 68234449Sobrien * sets rqst->rq_client_cred to the "cooked" form of the credentials. 69133362Sobrien * 70133362Sobrien * NB: rqst->rq_cxprt->verf must be pre-alloctaed; 71133362Sobrien * its length is set appropriately. 72133362Sobrien * 73133362Sobrien * The caller still owns and is responsible for msg->u.cmb.cred and 74133362Sobrien * msg->u.cmb.verf. The authentication system retains ownership of 75268515Sdelphij * rqst->rq_client_cred, the cooked credentials. 76268515Sdelphij * 77191771Sobrien * There is an assumption that any flavour less than AUTH_NULL is 78268515Sdelphij * invalid. 79268515Sdelphij */ 80191771Sobrienenum auth_stat 81133362Sobrien_authenticate(struct svc_req *rqst, struct rpc_msg *msg) 82133362Sobrien{ 83133362Sobrien int cred_flavor; 84234449Sobrien enum auth_stat dummy; 85234449Sobrien 86234449Sobrien rqst->rq_cred = msg->rm_call.cb_cred; 87133362Sobrien rqst->rq_auth.svc_ah_ops = &svc_auth_null_ops; 88133362Sobrien rqst->rq_auth.svc_ah_private = NULL; 89133362Sobrien cred_flavor = rqst->rq_cred.oa_flavor; 90169967Sobrien switch (cred_flavor) { 91169967Sobrien case AUTH_NULL: 92169967Sobrien dummy = _svcauth_null(rqst, msg); 93133362Sobrien return (dummy); 94133362Sobrien case AUTH_SYS: 95133362Sobrien dummy = _svcauth_unix(rqst, msg); 96268515Sdelphij return (dummy); 97133362Sobrien case AUTH_SHORT: 98133362Sobrien dummy = _svcauth_short(rqst, msg); 99159769Sobrien return (dummy); 100159769Sobrien case RPCSEC_GSS: 101159769Sobrien if (!_svcauth_rpcsec_gss) 102133362Sobrien return (AUTH_REJECTEDCRED); 103133362Sobrien dummy = _svcauth_rpcsec_gss(rqst, msg); 104133362Sobrien return (dummy); 105268515Sdelphij default: 106268515Sdelphij break; 107268515Sdelphij } 108133362Sobrien 109133362Sobrien return (AUTH_REJECTEDCRED); 110133362Sobrien} 111268515Sdelphij 112133362Sobrien/* 113133362Sobrien * A set of null auth methods used by any authentication protocols 114284193Sdelphij * that don't need to inspect or modify the message body. 115284193Sdelphij */ 116284193Sdelphijstatic bool_t 117284193Sdelphijsvcauth_null_wrap(SVCAUTH *auth, struct mbuf **mp) 118284193Sdelphij{ 119268515Sdelphij 120268515Sdelphij return (TRUE); 121234449Sobrien} 122284193Sdelphij 123284193Sdelphijstatic bool_t 124284193Sdelphijsvcauth_null_unwrap(SVCAUTH *auth, struct mbuf **mp) 125268515Sdelphij{ 126268515Sdelphij 127268515Sdelphij return (TRUE); 128133362Sobrien} 129133362Sobrien 130133362Sobrienstatic void 131133362Sobriensvcauth_null_release(SVCAUTH *auth) 132133362Sobrien{ 133133362Sobrien 134268515Sdelphij} 135268515Sdelphij 136268515Sdelphijstatic struct svc_auth_ops svc_auth_null_ops = { 137133362Sobrien svcauth_null_wrap, 138133362Sobrien svcauth_null_unwrap, 139133362Sobrien svcauth_null_release, 140133362Sobrien}; 141133362Sobrien 142133362Sobrien/*ARGSUSED*/ 143133362Sobrienenum auth_stat 144133362Sobrien_svcauth_null(struct svc_req *rqst, struct rpc_msg *msg) 145133362Sobrien{ 146191771Sobrien 147191771Sobrien rqst->rq_verf = _null_auth; 148191771Sobrien return (AUTH_OK); 149191771Sobrien} 150191771Sobrien 151191771Sobrienint 152169946Sobriensvc_auth_reg(int flavor, 153185777Skib enum auth_stat (*svcauth)(struct svc_req *, struct rpc_msg *), 154169946Sobrien int (*getcred)(struct svc_req *, struct ucred **, int *)) 155175299Sobrien{ 156175299Sobrien 157175299Sobrien if (flavor == RPCSEC_GSS) { 158133362Sobrien _svcauth_rpcsec_gss = svcauth; 159133362Sobrien _svcauth_rpcsec_gss_getcred = getcred; 160133362Sobrien } 161208341Smarius return (TRUE); 162208341Smarius} 163208341Smarius 164234449Sobrienint 165133362Sobriensvc_getcred(struct svc_req *rqst, struct ucred **crp, int *flavorp) 166133362Sobrien{ 167234449Sobrien struct ucred *cr = NULL; 168191771Sobrien int flavor; 169191771Sobrien struct xucred *xcr; 170234449Sobrien 171191771Sobrien flavor = rqst->rq_cred.oa_flavor; 172191771Sobrien if (flavorp) 173133362Sobrien *flavorp = flavor; 174133362Sobrien 175133362Sobrien switch (flavor) { 176268515Sdelphij case AUTH_UNIX: 177268515Sdelphij xcr = (struct xucred *) rqst->rq_clntcred; 178268515Sdelphij cr = crget(); 179133362Sobrien cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid; 180133362Sobrien crsetgroups(cr, xcr->cr_ngroups, xcr->cr_groups); 181133362Sobrien cr->cr_rgid = cr->cr_svgid = cr->cr_groups[0]; 182169946Sobrien cr->cr_prison = &prison0; 183169946Sobrien prison_hold(cr->cr_prison); 184169946Sobrien *crp = cr; 185133362Sobrien return (TRUE); 186133362Sobrien 187133362Sobrien case RPCSEC_GSS: 188133362Sobrien if (!_svcauth_rpcsec_gss_getcred) 189133362Sobrien return (FALSE); 190133362Sobrien return (_svcauth_rpcsec_gss_getcred(rqst, crp, flavorp)); 191133362Sobrien 192133362Sobrien default: 193133362Sobrien return (FALSE); 194208341Smarius } 195159769Sobrien} 196159769Sobrien 197133362Sobrien