/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ /* * Portions of this source code were derived from Berkeley * 4.3 BSD under license from the Regents of the University of * California. */ /* * svc_auth.c, Server-side rpc authenticator interface. * */ #include "mt.h" #include "rpc_mt.h" #include <rpc/rpc.h> #include <sys/types.h> #include <stdlib.h> /* * 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) * struct svc_req *rqst; * struct rpc_msg *msg; * * The RPCSEC_GSS flavor is an exception. Its routine takes an * additional boolean parameter that gets set to TRUE when the call * is not to be dispatched to the server. */ enum auth_stat __svcauth_null(); /* no authentication */ enum auth_stat __svcauth_sys(); /* (system) unix style (uid, gids) */ enum auth_stat __svcauth_short(); /* short hand unix style */ enum auth_stat __svcauth_des(); /* des style */ enum auth_stat __svcauth_loopback(); /* (loopback) unix style (uid, gids) */ extern enum auth_stat __svcrpcsec_gss(); /* GSS style */ /* declarations to allow servers to specify new authentication flavors */ struct authsvc { int flavor; enum auth_stat (*handler)(); struct authsvc *next; }; static struct authsvc *Auths = NULL; /* * The call rpc message, msg has been obtained from the wire. The msg contains * the raw form of credentials and verifiers. no_dispatch is used and * dereferenced in subsequent gss function calls. 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 __gss_authenticate(struct svc_req *rqst, struct rpc_msg *msg, bool_t *no_dispatch) { int cred_flavor; struct authsvc *asp; extern mutex_t authsvc_lock; /* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */ 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; *no_dispatch = FALSE; switch (cred_flavor) { case AUTH_NULL: return (__svcauth_null(rqst, msg)); case AUTH_SYS: return (__svcauth_sys(rqst, msg)); case AUTH_SHORT: return (__svcauth_short(rqst, msg)); case AUTH_DES: return (__svcauth_des(rqst, msg)); case AUTH_LOOPBACK: return (__svcauth_loopback(rqst, msg)); case RPCSEC_GSS: return (__svcrpcsec_gss(rqst, msg, no_dispatch)); } /* flavor doesn't match any of the builtin types, so try new ones */ (void) mutex_lock(&authsvc_lock); for (asp = Auths; asp; asp = asp->next) { if (asp->flavor == cred_flavor) { enum auth_stat as; as = (*asp->handler)(rqst, msg); (void) mutex_unlock(&authsvc_lock); return (as); } } (void) mutex_unlock(&authsvc_lock); return (AUTH_REJECTEDCRED); } /* * The following function __authenticate(rqst, msg) is preserved for * backward compatibility. */ enum auth_stat __authenticate(struct svc_req *rqst, struct rpc_msg *msg) { bool_t no_dispatch; return (__gss_authenticate(rqst, msg, &no_dispatch)); } /*ARGSUSED*/ enum auth_stat __svcauth_null(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(int cred_flavor, enum auth_stat (*handler)()) { struct authsvc *asp; extern mutex_t authsvc_lock; switch (cred_flavor) { case AUTH_NULL: case AUTH_SYS: case AUTH_SHORT: case AUTH_DES: case AUTH_LOOPBACK: case RPCSEC_GSS: /* already registered */ return (1); } (void) mutex_lock(&authsvc_lock); for (asp = Auths; asp; asp = asp->next) { if (asp->flavor == cred_flavor) { /* already registered */ (void) mutex_unlock(&authsvc_lock); return (1); } } /* this is a new one, so go ahead and register it */ asp = malloc(sizeof (*asp)); if (asp == NULL) { (void) mutex_unlock(&authsvc_lock); return (-1); } asp->flavor = cred_flavor; asp->handler = handler; asp->next = Auths; Auths = asp; (void) mutex_unlock(&authsvc_lock); return (0); }
