/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ /* * Copyright (c) 1986-1991 by Sun Microsystems Inc. */ #ident "@(#)svc_auth.c 1.16 94/04/24 SMI" #if !defined(lint) && defined(SCCSIDS) #if 0 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro"; #else static const char rcsid[] = "$FreeBSD: src/lib/libc/rpc/svc_auth.c,v 1.7 1999/12/29 05:04:16 peter Exp $"; #endif #endif /* * svc_auth.c, Server-side rpc authenticator interface. * */ #ifdef _KERNEL #include #include #include #include #include #include #include #include #else #include #include #endif #include /* * svcauthsw is the bdevsw of server side authentication. * * Server side authenticators are called from authenticate by * using the client auth struct flavor field to index into svcauthsw. * The server auth flavors must implement a routine that looks * like: * * enum auth_stat * flavorx_auth(rqst, msg) * register struct svc_req *rqst; * register struct rpc_msg *msg; * */ enum auth_stat _svcauth_null(); /* no authentication */ enum auth_stat _svcauth_unix(); /* (system) unix style (uid, gids) */ enum auth_stat _svcauth_short(); /* short hand unix style */ enum auth_stat _svcauth_des(); /* des style */ /* declarations to allow servers to specify new authentication flavors */ struct authsvc { int flavor; enum auth_stat (*handler)(); struct authsvc *next; }; #define Auths ((struct authsvc *)((struct rtems_rpc_task_variables *)rtems_rpc_task_variables)->svc_auths_Auths) /* * The call rpc message, msg has been obtained from the wire. The msg contains * the raw form of credentials and verifiers. authenticate returns AUTH_OK * if the msg is successfully authenticated. If AUTH_OK then the routine also * does the following things: * set rqst->rq_xprt->verf to the appropriate response verifier; * sets rqst->rq_client_cred to the "cooked" form of the credentials. * * NB: rqst->rq_cxprt->verf must be pre-alloctaed; * its length is set appropriately. * * The caller still owns and is responsible for msg->u.cmb.cred and * msg->u.cmb.verf. The authentication system retains ownership of * rqst->rq_client_cred, the cooked credentials. * * There is an assumption that any flavour less than AUTH_NULL is * invalid. */ enum auth_stat _authenticate(rqst, msg) register struct svc_req *rqst; struct rpc_msg *msg; { register int cred_flavor; register struct authsvc *asp; rqst->rq_cred = msg->rm_call.cb_cred; rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; rqst->rq_xprt->xp_verf.oa_length = 0; cred_flavor = rqst->rq_cred.oa_flavor; switch (cred_flavor) { case AUTH_NULL: return(_svcauth_null(rqst, msg)); case AUTH_UNIX: return(_svcauth_unix(rqst, msg)); case AUTH_SHORT: return(_svcauth_short(rqst, msg)); /* * We leave AUTH_DES turned off by default because svcauth_des() * needs getpublickey(), which is in librpcsvc, not libc. If we * included AUTH_DES as a built-in flavor, programs that don't * have -lrpcsvc in their Makefiles wouldn't link correctly, even * though they don't use AUTH_DES. And I'm too lazy to go through * the tree looking for all of them. */ #ifdef DES_BUILTIN case AUTH_DES: return(_svcauth_des(rqst, msg)); #endif } /* flavor doesn't match any of the builtin types, so try new ones */ for (asp = Auths; asp; asp = asp->next) { if (asp->flavor == cred_flavor) { enum auth_stat as; as = (*asp->handler)(rqst, msg); return (as); } } return (AUTH_REJECTEDCRED); } /*ARGSUSED*/ enum auth_stat _svcauth_null(rqst, msg) struct svc_req *rqst; struct rpc_msg *msg; { return (AUTH_OK); } /* * Allow the rpc service to register new authentication types that it is * prepared to handle. When an authentication flavor is registered, * the flavor is checked against already registered values. If not * registered, then a new Auths entry is added on the list. * * There is no provision to delete a registration once registered. * * This routine returns: * 0 if registration successful * 1 if flavor already registered * -1 if can't register (errno set) */ int svc_auth_reg(cred_flavor, handler) register int cred_flavor; enum auth_stat (*handler)(); { register struct authsvc *asp; switch (cred_flavor) { case AUTH_NULL: case AUTH_UNIX: case AUTH_SHORT: #ifdef DES_BUILTIN case AUTH_DES: #endif /* already registered */ return (1); default: for (asp = Auths; asp; asp = asp->next) { if (asp->flavor == cred_flavor) { /* already registered */ return (1); } } /* this is a new one, so go ahead and register it */ asp = (struct authsvc *)mem_alloc(sizeof (*asp)); if (asp == NULL) { return (-1); } asp->flavor = cred_flavor; asp->handler = handler; asp->next = Auths; Auths = asp; break; } return (0); }