1 /* $NetBSD: svc_auth_unix.c,v 1.5 1997/07/13 20:13:22 christos 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 1.5 1997/07/13 20:13:22 christos 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 <stdio.h> 54 #include <string.h> 55 #include <rpc/rpc.h> 56 57 /* 58 * Unix longhand authenticator 59 */ 60 enum auth_stat 61 _svcauth_unix(rqst, msg) 62 register struct svc_req *rqst; 63 register struct rpc_msg *msg; 64 { 65 register enum auth_stat stat; 66 XDR xdrs; 67 register struct authunix_parms *aup; 68 register int32_t *buf; 69 struct area { 70 struct authunix_parms area_aup; 71 char area_machname[MAX_MACHINE_NAME+1]; 72 int area_gids[NGRPS]; 73 } *area; 74 u_int auth_len; 75 int str_len, gid_len; 76 register int i; 77 78 area = (struct area *) rqst->rq_clntcred; 79 aup = &area->area_aup; 80 aup->aup_machname = area->area_machname; 81 aup->aup_gids = area->area_gids; 82 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 83 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 84 buf = XDR_INLINE(&xdrs, auth_len); 85 if (buf != NULL) { 86 aup->aup_time = IXDR_GET_LONG(buf); 87 str_len = IXDR_GET_U_LONG(buf); 88 if (str_len > MAX_MACHINE_NAME) { 89 stat = AUTH_BADCRED; 90 goto done; 91 } 92 bcopy((caddr_t)buf, aup->aup_machname, (u_int)str_len); 93 aup->aup_machname[str_len] = 0; 94 str_len = RNDUP(str_len); 95 buf += str_len / sizeof (int32_t); 96 aup->aup_uid = IXDR_GET_LONG(buf); 97 aup->aup_gid = IXDR_GET_LONG(buf); 98 gid_len = IXDR_GET_U_LONG(buf); 99 if (gid_len > NGRPS) { 100 stat = AUTH_BADCRED; 101 goto done; 102 } 103 aup->aup_len = gid_len; 104 for (i = 0; i < gid_len; i++) { 105 aup->aup_gids[i] = IXDR_GET_LONG(buf); 106 } 107 /* 108 * five is the smallest unix credentials structure - 109 * timestamp, hostname len (0), uid, gid, and gids len (0). 110 */ 111 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 112 (void) printf("bad auth_len gid %d str %d auth %d\n", 113 gid_len, str_len, auth_len); 114 stat = AUTH_BADCRED; 115 goto done; 116 } 117 } else if (! xdr_authunix_parms(&xdrs, aup)) { 118 xdrs.x_op = XDR_FREE; 119 (void)xdr_authunix_parms(&xdrs, aup); 120 stat = AUTH_BADCRED; 121 goto done; 122 } 123 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 124 rqst->rq_xprt->xp_verf.oa_length = 0; 125 stat = AUTH_OK; 126 done: 127 XDR_DESTROY(&xdrs); 128 return (stat); 129 } 130 131 132 /* 133 * Shorthand unix authenticator 134 * Looks up longhand in a cache. 135 */ 136 /*ARGSUSED*/ 137 enum auth_stat 138 _svcauth_short(rqst, msg) 139 struct svc_req *rqst; 140 struct rpc_msg *msg; 141 { 142 return (AUTH_REJECTEDCRED); 143 } 144