1 /* $NetBSD: svc_auth_unix.c,v 1.16 2000/07/14 08:40:42 fvdl Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: svc_auth_unix.c,v 1.16 2000/07/14 08:40:42 fvdl Exp $"); 39 #endif 40 #endif 41 42 /* 43 * svc_auth_unix.c 44 * Handles UNIX flavor authentication parameters on the service side of rpc. 45 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 46 * _svcauth_unix does full blown unix style uid,gid+gids auth, 47 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 48 * Note: the shorthand has been gutted for efficiency. 49 * 50 * Copyright (C) 1984, Sun Microsystems, Inc. 51 */ 52 53 #include "namespace.h" 54 55 #include <assert.h> 56 #include <stdio.h> 57 #include <string.h> 58 59 #include <rpc/rpc.h> 60 61 /* 62 * Unix longhand authenticator 63 */ 64 enum auth_stat 65 _svcauth_unix(rqst, msg) 66 struct svc_req *rqst; 67 struct rpc_msg *msg; 68 { 69 enum auth_stat stat; 70 XDR xdrs; 71 struct authunix_parms *aup; 72 int32_t *buf; 73 struct area { 74 struct authunix_parms area_aup; 75 char area_machname[MAX_MACHINE_NAME+1]; 76 int area_gids[NGRPS]; 77 } *area; 78 u_int auth_len; 79 size_t str_len, gid_len; 80 int i; 81 82 _DIAGASSERT(rqst != NULL); 83 _DIAGASSERT(msg != NULL); 84 85 area = (struct area *) rqst->rq_clntcred; 86 aup = &area->area_aup; 87 aup->aup_machname = area->area_machname; 88 aup->aup_gids = area->area_gids; 89 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 90 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 91 buf = XDR_INLINE(&xdrs, auth_len); 92 if (buf != NULL) { 93 aup->aup_time = IXDR_GET_INT32(buf); 94 str_len = (size_t)IXDR_GET_U_INT32(buf); 95 if (str_len > MAX_MACHINE_NAME) { 96 stat = AUTH_BADCRED; 97 goto done; 98 } 99 memmove(aup->aup_machname, buf, str_len); 100 aup->aup_machname[str_len] = 0; 101 str_len = RNDUP(str_len); 102 buf += str_len / sizeof (int32_t); 103 aup->aup_uid = (int)IXDR_GET_INT32(buf); 104 aup->aup_gid = (int)IXDR_GET_INT32(buf); 105 gid_len = (size_t)IXDR_GET_U_INT32(buf); 106 if (gid_len > NGRPS) { 107 stat = AUTH_BADCRED; 108 goto done; 109 } 110 aup->aup_len = gid_len; 111 for (i = 0; i < gid_len; i++) { 112 aup->aup_gids[i] = (int)IXDR_GET_INT32(buf); 113 } 114 /* 115 * five is the smallest unix credentials structure - 116 * timestamp, hostname len (0), uid, gid, and gids len (0). 117 */ 118 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 119 (void) printf("bad auth_len gid %ld str %ld auth %u\n", 120 (long)gid_len, (long)str_len, auth_len); 121 stat = AUTH_BADCRED; 122 goto done; 123 } 124 } else if (! xdr_authunix_parms(&xdrs, aup)) { 125 xdrs.x_op = XDR_FREE; 126 (void)xdr_authunix_parms(&xdrs, aup); 127 stat = AUTH_BADCRED; 128 goto done; 129 } 130 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 131 rqst->rq_xprt->xp_verf.oa_length = 0; 132 stat = AUTH_OK; 133 done: 134 XDR_DESTROY(&xdrs); 135 return (stat); 136 } 137 138 139 /* 140 * Shorthand unix authenticator 141 * Looks up longhand in a cache. 142 */ 143 /*ARGSUSED*/ 144 enum auth_stat 145 _svcauth_short(rqst, msg) 146 struct svc_req *rqst; 147 struct rpc_msg *msg; 148 { 149 return (AUTH_REJECTEDCRED); 150 } 151