1 /* $NetBSD: svc_auth_unix.c,v 1.4 1996/12/20 20:47:56 cgd 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 #if defined(LIBC_SCCS) && !defined(lint) 33 /*static char *sccsid = "from: @(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";*/ 34 /*static char *sccsid = "from: @(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC";*/ 35 static char *rcsid = "$NetBSD: svc_auth_unix.c,v 1.4 1996/12/20 20:47:56 cgd Exp $"; 36 #endif 37 38 /* 39 * svc_auth_unix.c 40 * Handles UNIX flavor authentication parameters on the service side of rpc. 41 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 42 * _svcauth_unix does full blown unix style uid,gid+gids auth, 43 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 44 * Note: the shorthand has been gutted for efficiency. 45 * 46 * Copyright (C) 1984, Sun Microsystems, Inc. 47 */ 48 49 #include <stdio.h> 50 #include <string.h> 51 #include <rpc/rpc.h> 52 53 /* 54 * Unix longhand authenticator 55 */ 56 enum auth_stat 57 _svcauth_unix(rqst, msg) 58 register struct svc_req *rqst; 59 register struct rpc_msg *msg; 60 { 61 register enum auth_stat stat; 62 XDR xdrs; 63 register struct authunix_parms *aup; 64 register int32_t *buf; 65 struct area { 66 struct authunix_parms area_aup; 67 char area_machname[MAX_MACHINE_NAME+1]; 68 int area_gids[NGRPS]; 69 } *area; 70 u_int auth_len; 71 int str_len, gid_len; 72 register int i; 73 74 area = (struct area *) rqst->rq_clntcred; 75 aup = &area->area_aup; 76 aup->aup_machname = area->area_machname; 77 aup->aup_gids = area->area_gids; 78 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 79 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 80 buf = XDR_INLINE(&xdrs, auth_len); 81 if (buf != NULL) { 82 aup->aup_time = IXDR_GET_LONG(buf); 83 str_len = IXDR_GET_U_LONG(buf); 84 if (str_len > MAX_MACHINE_NAME) { 85 stat = AUTH_BADCRED; 86 goto done; 87 } 88 bcopy((caddr_t)buf, aup->aup_machname, (u_int)str_len); 89 aup->aup_machname[str_len] = 0; 90 str_len = RNDUP(str_len); 91 buf += str_len / sizeof (int32_t); 92 aup->aup_uid = IXDR_GET_LONG(buf); 93 aup->aup_gid = IXDR_GET_LONG(buf); 94 gid_len = IXDR_GET_U_LONG(buf); 95 if (gid_len > NGRPS) { 96 stat = AUTH_BADCRED; 97 goto done; 98 } 99 aup->aup_len = gid_len; 100 for (i = 0; i < gid_len; i++) { 101 aup->aup_gids[i] = IXDR_GET_LONG(buf); 102 } 103 /* 104 * five is the smallest unix credentials structure - 105 * timestamp, hostname len (0), uid, gid, and gids len (0). 106 */ 107 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 108 (void) printf("bad auth_len gid %d str %d auth %d\n", 109 gid_len, str_len, auth_len); 110 stat = AUTH_BADCRED; 111 goto done; 112 } 113 } else if (! xdr_authunix_parms(&xdrs, aup)) { 114 xdrs.x_op = XDR_FREE; 115 (void)xdr_authunix_parms(&xdrs, aup); 116 stat = AUTH_BADCRED; 117 goto done; 118 } 119 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 120 rqst->rq_xprt->xp_verf.oa_length = 0; 121 stat = AUTH_OK; 122 done: 123 XDR_DESTROY(&xdrs); 124 return (stat); 125 } 126 127 128 /* 129 * Shorthand unix authenticator 130 * Looks up longhand in a cache. 131 */ 132 /*ARGSUSED*/ 133 enum auth_stat 134 _svcauth_short(rqst, msg) 135 struct svc_req *rqst; 136 struct rpc_msg *msg; 137 { 138 return (AUTH_REJECTEDCRED); 139 } 140