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Diffstat (limited to 'src/svc_auth.c')
| -rw-r--r-- | src/svc_auth.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/svc_auth.c b/src/svc_auth.c new file mode 100644 index 0000000..789d6af --- /dev/null +++ b/src/svc_auth.c @@ -0,0 +1,219 @@ + +/* + * Copyright (c) 2009, Sun Microsystems, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * - Neither the name of Sun Microsystems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +/* + * Copyright (c) 1986-1991 by Sun Microsystems Inc. + */ + +/* + * svc_auth.c, Server-side rpc authenticator interface. + * + */ +#include <pthread.h> +#include <reentrant.h> +#include <sys/types.h> +#include <rpc/rpc.h> +#include <rpc/auth_des.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; + * + */ + +/* declarations to allow servers to specify new authentication flavors */ +struct authsvc { + int flavor; + enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *); + struct authsvc *next; +}; +static struct authsvc *Auths = NULL; + +extern SVCAUTH svc_auth_none; + +#ifdef AUTHDES_SUPPORT +extern enum auth_stat _svcauth_des(struct svc_req *rqst, struct rpc_msg *msg); +#endif +/* + * 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 +_gss_authenticate(rqst, msg, no_dispatch) + struct svc_req *rqst; + struct rpc_msg *msg; + bool_t *no_dispatch; +{ + int cred_flavor; + struct authsvc *asp; + enum auth_stat dummy; + extern mutex_t authsvc_lock; + +/* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */ + + rqst->rq_cred = msg->rm_call.cb_cred; + SVC_XP_AUTH(rqst->rq_xprt).svc_ah_ops = svc_auth_none.svc_ah_ops; + SVC_XP_AUTH(rqst->rq_xprt).svc_ah_private = NULL; + 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_NONE: + dummy = _svcauth_none(rqst, msg); + return (dummy); + case AUTH_SYS: + dummy = _svcauth_unix(rqst, msg); + return (dummy); + case AUTH_SHORT: + dummy = _svcauth_short(rqst, msg); + return (dummy); + case AUTH_DES: +#ifdef AUTHDES_SUPPORT + dummy = _svcauth_des(rqst, msg); + return (dummy); +#else + return (AUTH_FAILED); +#endif +#ifdef HAVE_RPCSEC_GSS + case RPCSEC_GSS: + dummy = _svcauth_gss(rqst, msg, no_dispatch); + return (dummy); +#endif + default: + break; + } + + /* flavor doesn't match any of the builtin types, so try new ones */ + 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); + mutex_unlock(&authsvc_lock); + return (as); + } + } + mutex_unlock(&authsvc_lock); + + return (AUTH_REJECTEDCRED); +} + +enum auth_stat +_authenticate(struct svc_req *rqst, struct rpc_msg *msg) +{ + bool_t no_dispatch; + return _gss_authenticate(rqst, msg, &no_dispatch); +} + +/* + * 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) + int cred_flavor; + enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *); +{ + struct authsvc *asp; + extern mutex_t authsvc_lock; + + switch (cred_flavor) { + case AUTH_NULL: + case AUTH_SYS: + case AUTH_SHORT: + case AUTH_DES: +#ifndef AUTHDES_SUPPORT + return(-1); +#endif +#ifdef HAVE_RPCSEC_GSS + case RPCSEC_GSS: +#endif + /* already registered */ + return (1); + + default: + mutex_lock(&authsvc_lock); + for (asp = Auths; asp; asp = asp->next) { + if (asp->flavor == cred_flavor) { + /* already registered */ + mutex_unlock(&authsvc_lock); + return (1); + } + } + + /* this is a new one, so go ahead and register it */ + asp = mem_alloc(sizeof (*asp)); + if (asp == NULL) { + mutex_unlock(&authsvc_lock); + return (-1); + } + asp->flavor = cred_flavor; + asp->handler = handler; + asp->next = Auths; + Auths = asp; + mutex_unlock(&authsvc_lock); + break; + } + return (0); +} |