1 /* $OpenBSD: svc_auth.c,v 1.10 2016/09/23 02:53:46 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * svc_auth_nodes.c, Server-side rpc authenticator interface, 36 * *WITHOUT* DES authentication. 37 */ 38 39 #include <rpc/rpc.h> 40 41 /* 42 * svcauthsw is the bdevsw of server side authentication. 43 * 44 * Server side authenticators are called from authenticate by 45 * using the client auth struct flavor field to index into svcauthsw. 46 * The server auth flavors must implement a routine that looks 47 * like: 48 * 49 * enum auth_stat 50 * flavorx_auth(rqst, msg) 51 * struct svc_req *rqst; 52 * struct rpc_msg *msg; 53 * 54 */ 55 56 /* no authentication */ 57 enum auth_stat _svcauth_null(void); 58 PROTO_NORMAL(_svcauth_null); 59 60 static struct { 61 enum auth_stat (*authenticator)(); 62 } svcauthsw[] = { 63 { _svcauth_null }, /* AUTH_NULL */ 64 { _svcauth_unix }, /* AUTH_UNIX */ 65 { _svcauth_short } /* AUTH_SHORT */ 66 }; 67 #define AUTH_MAX 2 /* HIGHEST AUTH NUMBER */ 68 69 70 /* 71 * The call rpc message, msg has been obtained from the wire. The msg contains 72 * the raw form of credentials and verifiers. authenticate returns AUTH_OK 73 * if the msg is successfully authenticated. If AUTH_OK then the routine also 74 * does the following things: 75 * set rqst->rq_xprt->verf to the appropriate response verifier; 76 * sets rqst->rq_client_cred to the "cooked" form of the credentials. 77 * 78 * NB: rqst->rq_cxprt->verf must be pre-allocated; 79 * its length is set appropriately. 80 * 81 * The caller still owns and is responsible for msg->u.cmb.cred and 82 * msg->u.cmb.verf. The authentication system retains ownership of 83 * rqst->rq_client_cred, the cooked credentials. 84 * 85 * There is an assumption that any flavour less than AUTH_NULL is 86 * invalid. 87 */ 88 enum auth_stat 89 _authenticate(struct svc_req *rqst, struct rpc_msg *msg) 90 { 91 int cred_flavor; 92 93 rqst->rq_cred = msg->rm_call.cb_cred; 94 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; 95 rqst->rq_xprt->xp_verf.oa_length = 0; 96 cred_flavor = rqst->rq_cred.oa_flavor; 97 if ((cred_flavor <= AUTH_MAX) && (cred_flavor >= AUTH_NULL)) { 98 return ((*(svcauthsw[cred_flavor].authenticator))(rqst, msg)); 99 } 100 101 return (AUTH_REJECTEDCRED); 102 } 103 104 enum auth_stat 105 _svcauth_null(void) 106 /*struct svc_req *rqst; 107 struct rpc_msg *msg;*/ 108 { 109 110 return (AUTH_OK); 111 } 112 DEF_STRONG(_svcauth_null); 113