1 /* $OpenBSD: svc_auth.c,v 1.7 2005/08/08 08:05:35 espie Exp $ */ 2 /* 3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 4 * unrestricted use provided that this legend is included on all tape 5 * media and as a part of the software program in whole or part. Users 6 * may copy or modify Sun RPC without charge, but are not authorized 7 * to license or distribute it to anyone else except as part of a product or 8 * program developed by the user. 9 * 10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 13 * 14 * Sun RPC is provided with no support and without any obligation on the 15 * part of Sun Microsystems, Inc. to assist in its use, correction, 16 * modification or enhancement. 17 * 18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 20 * OR ANY PART THEREOF. 21 * 22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 23 * or profits or other special, indirect and consequential damages, even if 24 * Sun has been advised of the possibility of such damages. 25 * 26 * Sun Microsystems, Inc. 27 * 2550 Garcia Avenue 28 * Mountain View, California 94043 29 */ 30 31 /* 32 * svc_auth_nodes.c, Server-side rpc authenticator interface, 33 * *WITHOUT* DES authentication. 34 * 35 * Copyright (C) 1984, Sun Microsystems, Inc. 36 */ 37 38 #include <rpc/rpc.h> 39 40 /* 41 * svcauthsw is the bdevsw of server side authentication. 42 * 43 * Server side authenticators are called from authenticate by 44 * using the client auth struct flavor field to index into svcauthsw. 45 * The server auth flavors must implement a routine that looks 46 * like: 47 * 48 * enum auth_stat 49 * flavorx_auth(rqst, msg) 50 * struct svc_req *rqst; 51 * struct rpc_msg *msg; 52 * 53 */ 54 55 /* no authentication */ 56 enum auth_stat _svcauth_null(void); 57 /* unix style (uid, gids) */ 58 enum auth_stat _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg); 59 /* short hand unix style */ 60 enum auth_stat _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg); 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(struct svc_req *rqst, struct rpc_msg *msg) 92 { 93 int cred_flavor; 94 95 rqst->rq_cred = msg->rm_call.cb_cred; 96 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; 97 rqst->rq_xprt->xp_verf.oa_length = 0; 98 cred_flavor = rqst->rq_cred.oa_flavor; 99 if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) { 100 return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg)); 101 } 102 103 return (AUTH_REJECTEDCRED); 104 } 105 106 enum auth_stat 107 _svcauth_null(void) 108 /*struct svc_req *rqst; 109 struct rpc_msg *msg;*/ 110 { 111 112 return (AUTH_OK); 113 } 114