svc_auth.c revision 267654
1219019Sgabor/* $NetBSD: svc_auth.c,v 1.12 2000/07/06 03:10:35 christos Exp $ */ 2219019Sgabor 3219019Sgabor/*- 4219019Sgabor * Copyright (c) 2009, Sun Microsystems, Inc. 5219019Sgabor * All rights reserved. 6219019Sgabor * 7219019Sgabor * Redistribution and use in source and binary forms, with or without 8219019Sgabor * modification, are permitted provided that the following conditions are met: 9219019Sgabor * - Redistributions of source code must retain the above copyright notice, 10219019Sgabor * this list of conditions and the following disclaimer. 11219019Sgabor * - Redistributions in binary form must reproduce the above copyright notice, 12219019Sgabor * this list of conditions and the following disclaimer in the documentation 13219019Sgabor * and/or other materials provided with the distribution. 14219019Sgabor * - Neither the name of Sun Microsystems, Inc. nor the names of its 15219019Sgabor * contributors may be used to endorse or promote products derived 16219019Sgabor * from this software without specific prior written permission. 17219019Sgabor * 18219019Sgabor * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19219019Sgabor * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20219019Sgabor * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21219019Sgabor * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22219019Sgabor * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23219019Sgabor * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24219019Sgabor * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25219019Sgabor * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26219019Sgabor * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27219019Sgabor * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28219019Sgabor * POSSIBILITY OF SUCH DAMAGE. 29219019Sgabor */ 30219019Sgabor/* 31219019Sgabor * Copyright (c) 1986-1991 by Sun Microsystems Inc. 32219019Sgabor */ 33219019Sgabor 34219019Sgabor#if defined(LIBC_SCCS) && !defined(lint) 35219019Sgabor#ident "@(#)svc_auth.c 1.16 94/04/24 SMI" 36219019Sgaborstatic char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro"; 37219019Sgabor#endif 38219019Sgabor#include <sys/cdefs.h> 39219019Sgabor__FBSDID("$FreeBSD: releng/9.3/sys/rpc/svc_auth.c 261057 2014-01-23 00:28:17Z mav $"); 40219019Sgabor 41219019Sgabor/* 42219019Sgabor * svc_auth.c, Server-side rpc authenticator interface. 43219019Sgabor * 44219019Sgabor */ 45219019Sgabor 46219019Sgabor#include <sys/param.h> 47219019Sgabor#include <sys/lock.h> 48219019Sgabor#include <sys/mutex.h> 49219019Sgabor#include <sys/systm.h> 50219019Sgabor#include <sys/jail.h> 51219019Sgabor#include <sys/ucred.h> 52219019Sgabor 53219019Sgabor#include <rpc/rpc.h> 54219019Sgabor 55219019Sgaborstatic enum auth_stat (*_svcauth_rpcsec_gss)(struct svc_req *, 56219019Sgabor struct rpc_msg *) = NULL; 57219019Sgaborstatic int (*_svcauth_rpcsec_gss_getcred)(struct svc_req *, 58219019Sgabor struct ucred **, int *); 59219019Sgabor 60219019Sgaborstatic struct svc_auth_ops svc_auth_null_ops; 61219019Sgabor 62219019Sgabor/* 63219019Sgabor * The call rpc message, msg has been obtained from the wire. The msg contains 64219019Sgabor * the raw form of credentials and verifiers. authenticate returns AUTH_OK 65219019Sgabor * if the msg is successfully authenticated. If AUTH_OK then the routine also 66219019Sgabor * does the following things: 67219019Sgabor * set rqst->rq_xprt->verf to the appropriate response verifier; 68219019Sgabor * sets rqst->rq_client_cred to the "cooked" form of the credentials. 69219019Sgabor * 70219019Sgabor * NB: rqst->rq_cxprt->verf must be pre-alloctaed; 71219019Sgabor * its length is set appropriately. 72219019Sgabor * 73219019Sgabor * The caller still owns and is responsible for msg->u.cmb.cred and 74219019Sgabor * msg->u.cmb.verf. The authentication system retains ownership of 75219019Sgabor * rqst->rq_client_cred, the cooked credentials. 76219019Sgabor * 77219019Sgabor * There is an assumption that any flavour less than AUTH_NULL is 78219019Sgabor * invalid. 79219019Sgabor */ 80219019Sgaborenum auth_stat 81219019Sgabor_authenticate(struct svc_req *rqst, struct rpc_msg *msg) 82219019Sgabor{ 83219019Sgabor int cred_flavor; 84219019Sgabor enum auth_stat dummy; 85219019Sgabor 86219019Sgabor rqst->rq_cred = msg->rm_call.cb_cred; 87219019Sgabor rqst->rq_auth.svc_ah_ops = &svc_auth_null_ops; 88219019Sgabor rqst->rq_auth.svc_ah_private = NULL; 89219019Sgabor cred_flavor = rqst->rq_cred.oa_flavor; 90219019Sgabor switch (cred_flavor) { 91219019Sgabor case AUTH_NULL: 92219019Sgabor dummy = _svcauth_null(rqst, msg); 93219019Sgabor return (dummy); 94219019Sgabor case AUTH_SYS: 95219019Sgabor dummy = _svcauth_unix(rqst, msg); 96219019Sgabor return (dummy); 97219019Sgabor case AUTH_SHORT: 98219019Sgabor dummy = _svcauth_short(rqst, msg); 99219019Sgabor return (dummy); 100219019Sgabor case RPCSEC_GSS: 101219019Sgabor if (!_svcauth_rpcsec_gss) 102219019Sgabor return (AUTH_REJECTEDCRED); 103219019Sgabor dummy = _svcauth_rpcsec_gss(rqst, msg); 104219019Sgabor return (dummy); 105219019Sgabor default: 106219019Sgabor break; 107219019Sgabor } 108219019Sgabor 109219019Sgabor return (AUTH_REJECTEDCRED); 110219019Sgabor} 111219019Sgabor 112219019Sgabor/* 113219019Sgabor * A set of null auth methods used by any authentication protocols 114219019Sgabor * that don't need to inspect or modify the message body. 115219019Sgabor */ 116219019Sgaborstatic bool_t 117219019Sgaborsvcauth_null_wrap(SVCAUTH *auth, struct mbuf **mp) 118219019Sgabor{ 119219019Sgabor 120219019Sgabor return (TRUE); 121219019Sgabor} 122219019Sgabor 123219019Sgaborstatic bool_t 124219019Sgaborsvcauth_null_unwrap(SVCAUTH *auth, struct mbuf **mp) 125219019Sgabor{ 126219019Sgabor 127219019Sgabor return (TRUE); 128219019Sgabor} 129219019Sgabor 130219019Sgaborstatic void 131219019Sgaborsvcauth_null_release(SVCAUTH *auth) 132219019Sgabor{ 133219019Sgabor 134219019Sgabor} 135219019Sgabor 136219019Sgaborstatic struct svc_auth_ops svc_auth_null_ops = { 137219019Sgabor svcauth_null_wrap, 138219019Sgabor svcauth_null_unwrap, 139219019Sgabor svcauth_null_release, 140219019Sgabor}; 141219019Sgabor 142219019Sgabor/*ARGSUSED*/ 143219019Sgaborenum auth_stat 144219019Sgabor_svcauth_null(struct svc_req *rqst, struct rpc_msg *msg) 145219019Sgabor{ 146219019Sgabor 147219019Sgabor rqst->rq_verf = _null_auth; 148219019Sgabor return (AUTH_OK); 149219019Sgabor} 150219019Sgabor 151219019Sgaborint 152219019Sgaborsvc_auth_reg(int flavor, 153219019Sgabor enum auth_stat (*svcauth)(struct svc_req *, struct rpc_msg *), 154219019Sgabor int (*getcred)(struct svc_req *, struct ucred **, int *)) 155219019Sgabor{ 156219019Sgabor 157219019Sgabor if (flavor == RPCSEC_GSS) { 158219019Sgabor _svcauth_rpcsec_gss = svcauth; 159219019Sgabor _svcauth_rpcsec_gss_getcred = getcred; 160219019Sgabor } 161219019Sgabor return (TRUE); 162219019Sgabor} 163219019Sgabor 164219019Sgaborint 165219019Sgaborsvc_getcred(struct svc_req *rqst, struct ucred **crp, int *flavorp) 166219019Sgabor{ 167219019Sgabor struct ucred *cr = NULL; 168219019Sgabor int flavor; 169219019Sgabor struct xucred *xcr; 170219019Sgabor 171219019Sgabor flavor = rqst->rq_cred.oa_flavor; 172219019Sgabor if (flavorp) 173219019Sgabor *flavorp = flavor; 174219019Sgabor 175219019Sgabor switch (flavor) { 176219019Sgabor case AUTH_UNIX: 177219019Sgabor xcr = (struct xucred *) rqst->rq_clntcred; 178219019Sgabor cr = crget(); 179219019Sgabor cr->cr_uid = cr->cr_ruid = cr->cr_svuid = xcr->cr_uid; 180219019Sgabor crsetgroups(cr, xcr->cr_ngroups, xcr->cr_groups); 181219019Sgabor cr->cr_rgid = cr->cr_svgid = cr->cr_groups[0]; 182219019Sgabor cr->cr_prison = &prison0; 183219019Sgabor prison_hold(cr->cr_prison); 184219019Sgabor *crp = cr; 185219019Sgabor return (TRUE); 186219019Sgabor 187219019Sgabor case RPCSEC_GSS: 188219019Sgabor if (!_svcauth_rpcsec_gss_getcred) 189219019Sgabor return (FALSE); 190219019Sgabor return (_svcauth_rpcsec_gss_getcred(rqst, crp, flavorp)); 191219019Sgabor 192219019Sgabor default: 193219019Sgabor return (FALSE); 194219019Sgabor } 195219019Sgabor} 196219019Sgabor 197219019Sgabor