1 /* $NetBSD: svc_auth_unix.c,v 1.20 2012/06/25 22:32:45 abs 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 1.20 2012/06/25 22:32:45 abs 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(struct svc_req *rqst, struct rpc_msg *msg) 66 { 67 enum auth_stat stat; 68 XDR xdrs; 69 struct authunix_parms *aup; 70 int32_t *buf; 71 struct area { 72 struct authunix_parms area_aup; 73 char area_machname[MAX_MACHINE_NAME+1]; 74 int area_gids[NGRPS]; 75 } *area; 76 u_int auth_len; 77 size_t str_len, gid_len, i; 78 79 _DIAGASSERT(rqst != NULL); 80 _DIAGASSERT(msg != NULL); 81 82 area = (struct area *) rqst->rq_clntcred; 83 aup = &area->area_aup; 84 aup->aup_machname = area->area_machname; 85 aup->aup_gids = area->area_gids; 86 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 87 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 88 buf = XDR_INLINE(&xdrs, auth_len); 89 if (buf != NULL) { 90 aup->aup_time = IXDR_GET_INT32(buf); 91 str_len = (size_t)IXDR_GET_U_INT32(buf); 92 if (str_len > MAX_MACHINE_NAME) { 93 stat = AUTH_BADCRED; 94 goto done; 95 } 96 memmove(aup->aup_machname, buf, str_len); 97 aup->aup_machname[str_len] = 0; 98 str_len = RNDUP(str_len); 99 buf += str_len / sizeof (int32_t); 100 aup->aup_uid = (int)IXDR_GET_INT32(buf); 101 aup->aup_gid = (int)IXDR_GET_INT32(buf); 102 gid_len = (size_t)IXDR_GET_U_INT32(buf); 103 if (gid_len > NGRPS) { 104 stat = AUTH_BADCRED; 105 goto done; 106 } 107 _DIAGASSERT(__type_fit(u_int, gid_len)); 108 aup->aup_len = (u_int)gid_len; 109 for (i = 0; i < gid_len; i++) { 110 aup->aup_gids[i] = (int)IXDR_GET_INT32(buf); 111 } 112 /* 113 * five is the smallest unix credentials structure - 114 * timestamp, hostname len (0), uid, gid, and gids len (0). 115 */ 116 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 117 (void) printf("bad auth_len gid %ld str %ld auth %u\n", 118 (long)gid_len, (long)str_len, auth_len); 119 stat = AUTH_BADCRED; 120 goto done; 121 } 122 } else if (! xdr_authunix_parms(&xdrs, aup)) { 123 xdrs.x_op = XDR_FREE; 124 (void)xdr_authunix_parms(&xdrs, aup); 125 stat = AUTH_BADCRED; 126 goto done; 127 } 128 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 129 rqst->rq_xprt->xp_verf.oa_length = 0; 130 stat = AUTH_OK; 131 done: 132 XDR_DESTROY(&xdrs); 133 return (stat); 134 } 135 136 137 /* 138 * Shorthand unix authenticator 139 * Looks up longhand in a cache. 140 */ 141 /*ARGSUSED*/ 142 enum auth_stat 143 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 144 { 145 return (AUTH_REJECTEDCRED); 146 } 147