svc_auth_unix.c revision 177685
1208946Sae/* 2208946Sae * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3208946Sae * unrestricted use provided that this legend is included on all tape 4208946Sae * media and as a part of the software program in whole or part. Users 5208946Sae * may copy or modify Sun RPC without charge, but are not authorized 6208946Sae * to license or distribute it to anyone else except as part of a product or 7208946Sae * program developed by the user. 8208946Sae * 9208946Sae * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10208946Sae * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11208946Sae * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12208946Sae * 13208946Sae * Sun RPC is provided with no support and without any obligation on the 14208946Sae * part of Sun Microsystems, Inc. to assist in its use, correction, 15208946Sae * modification or enhancement. 16208946Sae * 17208946Sae * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18208946Sae * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19208946Sae * OR ANY PART THEREOF. 20208946Sae * 21208946Sae * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22208946Sae * or profits or other special, indirect and consequential damages, even if 23208946Sae * Sun has been advised of the possibility of such damages. 24208946Sae * 25208946Sae * Sun Microsystems, Inc. 26208946Sae * 2550 Garcia Avenue 27208946Sae * Mountain View, California 94043 28208946Sae */ 29208946Sae 30208946Sae#if defined(LIBC_SCCS) && !defined(lint) 31208946Saestatic char *sccsid2 = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro"; 32208946Saestatic char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC"; 33208989Sae#endif 34208946Sae#include <sys/cdefs.h> 35208946Sae__FBSDID("$FreeBSD: head/sys/rpc/svc_auth_unix.c 177685 2008-03-28 09:50:32Z dfr $"); 36208989Sae 37208946Sae/* 38208946Sae * svc_auth_unix.c 39208989Sae * Handles UNIX flavor authentication parameters on the service side of rpc. 40208989Sae * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 41208946Sae * _svcauth_unix does full blown unix style uid,gid+gids auth, 42208946Sae * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 43208946Sae * Note: the shorthand has been gutted for efficiency. 44208946Sae * 45208946Sae * Copyright (C) 1984, Sun Microsystems, Inc. 46208946Sae */ 47208946Sae 48208946Sae#include <sys/param.h> 49208946Sae#include <sys/lock.h> 50208946Sae#include <sys/mutex.h> 51208946Sae#include <sys/systm.h> 52208946Sae#include <sys/ucred.h> 53208946Sae 54208946Sae#include <rpc/rpc.h> 55208946Sae 56208946Sae#include <rpc/rpc_com.h> 57208946Sae 58208946Sae#define MAX_MACHINE_NAME 255 59208946Sae#define NGRPS 16 60208946Sae 61208946Sae/* 62208946Sae * Unix longhand authenticator 63208946Sae */ 64208946Saeenum auth_stat 65208946Sae_svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 66208946Sae{ 67208946Sae enum auth_stat stat; 68208946Sae XDR xdrs; 69208946Sae int32_t *buf; 70208946Sae uint32_t time; 71208946Sae struct xucred *xcr; 72208946Sae u_int auth_len; 73208989Sae size_t str_len, gid_len; 74208946Sae u_int i; 75208946Sae 76208946Sae xcr = rqst->rq_clntcred; 77208946Sae auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 78208946Sae xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, 79208946Sae XDR_DECODE); 80208946Sae buf = XDR_INLINE(&xdrs, auth_len); 81208946Sae if (buf != NULL) { 82208946Sae time = IXDR_GET_UINT32(buf); 83208946Sae str_len = (size_t)IXDR_GET_UINT32(buf); 84208946Sae if (str_len > MAX_MACHINE_NAME) { 85208946Sae stat = AUTH_BADCRED; 86208946Sae goto done; 87208989Sae } 88208946Sae str_len = RNDUP(str_len); 89208946Sae buf += str_len / sizeof (int32_t); 90208946Sae xcr->cr_uid = IXDR_GET_UINT32(buf); 91208946Sae xcr->cr_groups[0] = IXDR_GET_UINT32(buf); 92208946Sae gid_len = (size_t)IXDR_GET_UINT32(buf); 93208946Sae if (gid_len > NGRPS) { 94208946Sae stat = AUTH_BADCRED; 95208946Sae goto done; 96208946Sae } 97208946Sae for (i = 0; i < gid_len; i++) { 98208946Sae if (i + 1 < NGROUPS) 99208946Sae xcr->cr_groups[i + 1] = IXDR_GET_INT32(buf); 100208989Sae else 101208946Sae buf++; 102208946Sae } 103208946Sae if (gid_len + 1 > NGROUPS) 104208946Sae xcr->cr_ngroups = NGROUPS; 105208946Sae else 106208946Sae xcr->cr_ngroups = gid_len + 1; 107208946Sae 108 /* 109 * five is the smallest unix credentials structure - 110 * timestamp, hostname len (0), uid, gid, and gids len (0). 111 */ 112 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 113 (void) printf("bad auth_len gid %ld str %ld auth %u\n", 114 (long)gid_len, (long)str_len, auth_len); 115 stat = AUTH_BADCRED; 116 goto done; 117 } 118 } else if (! xdr_authunix_parms(&xdrs, &time, xcr)) { 119 stat = AUTH_BADCRED; 120 goto done; 121 } 122 123 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 124 rqst->rq_xprt->xp_verf.oa_length = 0; 125 stat = AUTH_OK; 126done: 127 XDR_DESTROY(&xdrs); 128 129 return (stat); 130} 131 132 133/* 134 * Shorthand unix authenticator 135 * Looks up longhand in a cache. 136 */ 137/*ARGSUSED*/ 138enum auth_stat 139_svcauth_short(rqst, msg) 140 struct svc_req *rqst; 141 struct rpc_msg *msg; 142{ 143 return (AUTH_REJECTEDCRED); 144} 145