1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char *rcsid = "$OpenBSD: svc_auth_unix.c,v 1.7 2001/09/15 13:51:01 deraadt Exp $"; 32 #endif /* LIBC_SCCS and not lint */ 33 34 /* 35 * svc_auth_unix.c 36 * Handles UNIX flavor authentication parameters on the service side of rpc. 37 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 38 * _svcauth_unix does full blown unix style uid,gid+gids auth, 39 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 40 * Note: the shorthand has been gutted for efficiency. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 */ 44 45 #include <stdio.h> 46 #include <rpc/rpc.h> 47 #include <string.h> 48 49 /* 50 * Unix longhand authenticator 51 */ 52 enum auth_stat 53 _svcauth_unix(rqst, msg) 54 struct svc_req *rqst; 55 struct rpc_msg *msg; 56 { 57 enum auth_stat stat; 58 XDR xdrs; 59 struct authunix_parms *aup; 60 int32_t *buf; 61 struct area { 62 struct authunix_parms area_aup; 63 char area_machname[MAX_MACHINE_NAME+1]; 64 int area_gids[NGRPS]; 65 } *area; 66 u_int auth_len; 67 u_int str_len, gid_len; 68 u_int i; 69 70 area = (struct area *) rqst->rq_clntcred; 71 aup = &area->area_aup; 72 aup->aup_machname = area->area_machname; 73 aup->aup_gids = area->area_gids; 74 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 75 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 76 buf = XDR_INLINE(&xdrs, auth_len); 77 if (buf != NULL) { 78 aup->aup_time = IXDR_GET_LONG(buf); 79 str_len = IXDR_GET_U_LONG(buf); 80 if (str_len > MAX_MACHINE_NAME) { 81 stat = AUTH_BADCRED; 82 goto done; 83 } 84 memcpy(aup->aup_machname, (caddr_t)buf, (u_int)str_len); 85 aup->aup_machname[str_len] = 0; 86 str_len = RNDUP(str_len); 87 buf += str_len / sizeof (int32_t); 88 aup->aup_uid = IXDR_GET_LONG(buf); 89 aup->aup_gid = IXDR_GET_LONG(buf); 90 gid_len = IXDR_GET_U_LONG(buf); 91 if (gid_len > NGRPS) { 92 stat = AUTH_BADCRED; 93 goto done; 94 } 95 aup->aup_len = gid_len; 96 for (i = 0; i < gid_len; i++) { 97 aup->aup_gids[i] = IXDR_GET_LONG(buf); 98 } 99 /* 100 * five is the smallest unix credentials structure - 101 * timestamp, hostname len (0), uid, gid, and gids len (0). 102 */ 103 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 104 (void) printf("bad auth_len gid %u str %u auth %u\n", 105 gid_len, str_len, auth_len); 106 stat = AUTH_BADCRED; 107 goto done; 108 } 109 } else if (! xdr_authunix_parms(&xdrs, aup)) { 110 xdrs.x_op = XDR_FREE; 111 (void)xdr_authunix_parms(&xdrs, aup); 112 stat = AUTH_BADCRED; 113 goto done; 114 } 115 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 116 rqst->rq_xprt->xp_verf.oa_length = 0; 117 stat = AUTH_OK; 118 done: 119 XDR_DESTROY(&xdrs); 120 return (stat); 121 } 122 123 124 /* 125 * Shorthand unix authenticator 126 * Looks up longhand in a cache. 127 */ 128 /*ARGSUSED*/ 129 enum auth_stat 130 _svcauth_short(rqst, msg) 131 struct svc_req *rqst; 132 struct rpc_msg *msg; 133 { 134 return (AUTH_REJECTEDCRED); 135 } 136