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.c,v 1.5 2001/09/15 13:51:01 deraadt Exp $"; 32 #endif /* LIBC_SCCS and not lint */ 33 34 /* 35 * svc_auth_nodes.c, Server-side rpc authenticator interface, 36 * *WITHOUT* DES authentication. 37 * 38 * Copyright (C) 1984, Sun Microsystems, Inc. 39 */ 40 41 #include <rpc/rpc.h> 42 43 /* 44 * svcauthsw is the bdevsw of server side authentication. 45 * 46 * Server side authenticators are called from authenticate by 47 * using the client auth struct flavor field to index into svcauthsw. 48 * The server auth flavors must implement a routine that looks 49 * like: 50 * 51 * enum auth_stat 52 * flavorx_auth(rqst, msg) 53 * struct svc_req *rqst; 54 * struct rpc_msg *msg; 55 * 56 */ 57 58 enum auth_stat _svcauth_null(); /* no authentication */ 59 enum auth_stat _svcauth_unix(); /* unix style (uid, gids) */ 60 enum auth_stat _svcauth_short(); /* short hand unix style */ 61 62 static struct { 63 enum auth_stat (*authenticator)(); 64 } svcauthsw[] = { 65 { _svcauth_null }, /* AUTH_NULL */ 66 { _svcauth_unix }, /* AUTH_UNIX */ 67 { _svcauth_short } /* AUTH_SHORT */ 68 }; 69 #define AUTH_MAX 2 /* HIGHEST AUTH NUMBER */ 70 71 72 /* 73 * The call rpc message, msg has been obtained from the wire. The msg contains 74 * the raw form of credentials and verifiers. authenticate returns AUTH_OK 75 * if the msg is successfully authenticated. If AUTH_OK then the routine also 76 * does the following things: 77 * set rqst->rq_xprt->verf to the appropriate response verifier; 78 * sets rqst->rq_client_cred to the "cooked" form of the credentials. 79 * 80 * NB: rqst->rq_cxprt->verf must be pre-alloctaed; 81 * its length is set appropriately. 82 * 83 * The caller still owns and is responsible for msg->u.cmb.cred and 84 * msg->u.cmb.verf. The authentication system retains ownership of 85 * rqst->rq_client_cred, the cooked credentials. 86 * 87 * There is an assumption that any flavour less than AUTH_NULL is 88 * invalid. 89 */ 90 enum auth_stat 91 _authenticate(rqst, msg) 92 struct svc_req *rqst; 93 struct rpc_msg *msg; 94 { 95 int cred_flavor; 96 97 rqst->rq_cred = msg->rm_call.cb_cred; 98 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; 99 rqst->rq_xprt->xp_verf.oa_length = 0; 100 cred_flavor = rqst->rq_cred.oa_flavor; 101 if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) { 102 return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg)); 103 } 104 105 return (AUTH_REJECTEDCRED); 106 } 107 108 enum auth_stat 109 _svcauth_null(/*rqst, msg*/) 110 /*struct svc_req *rqst; 111 struct rpc_msg *msg;*/ 112 { 113 114 return (AUTH_OK); 115 } 116