/* * 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 */ /* * svc_auth_unix.c * Handles UNIX flavor authentication parameters on the service side of rpc. * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. * _svcauth_unix does full blown unix style uid,gid+gids auth, * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. * Note: the shorthand has been gutted for efficiency. * * Copyright (C) 1984, Sun Microsystems, Inc. */ #define __FORCE_GLIBC #include <features.h> #include <stdio.h> #include <string.h> #include <rpc/rpc.h> #include <rpc/svc.h> /* Experimentally off - libc_hidden_proto(memcpy) */ /* libc_hidden_proto(printf) */ /* libc_hidden_proto(xdrmem_create) */ /* libc_hidden_proto(xdr_authunix_parms) */ /* * Unix longhand authenticator */ enum auth_stat _svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg) attribute_hidden; enum auth_stat _svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg) { enum auth_stat stat; XDR xdrs; struct authunix_parms *aup; int32_t *buf; struct area { struct authunix_parms area_aup; char area_machname[MAX_MACHINE_NAME + 1]; gid_t area_gids[NGRPS]; } *area; u_int auth_len; u_int str_len, gid_len; u_int i; area = (struct area *) rqst->rq_clntcred; aup = &area->area_aup; aup->aup_machname = area->area_machname; aup->aup_gids = area->area_gids; auth_len = (u_int) msg->rm_call.cb_cred.oa_length; xdrmem_create (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, XDR_DECODE); buf = XDR_INLINE (&xdrs, auth_len); if (buf != NULL) { aup->aup_time = IXDR_GET_LONG (buf); str_len = IXDR_GET_U_INT32 (buf); if (str_len > MAX_MACHINE_NAME) { stat = AUTH_BADCRED; goto done; } memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len); aup->aup_machname[str_len] = 0; str_len = RNDUP (str_len); buf = (int32_t *) ((char *) buf + str_len); aup->aup_uid = IXDR_GET_LONG (buf); aup->aup_gid = IXDR_GET_LONG (buf); gid_len = IXDR_GET_U_INT32 (buf); if (gid_len > NGRPS) { stat = AUTH_BADCRED; goto done; } aup->aup_len = gid_len; for (i = 0; i < gid_len; i++) { aup->aup_gids[i] = IXDR_GET_LONG (buf); } /* * five is the smallest unix credentials structure - * timestamp, hostname len (0), uid, gid, and gids len (0). */ if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { (void) printf ("bad auth_len gid %d str %d auth %d\n", gid_len, str_len, auth_len); stat = AUTH_BADCRED; goto done; } } else if (!xdr_authunix_parms (&xdrs, aup)) { xdrs.x_op = XDR_FREE; (void) xdr_authunix_parms (&xdrs, aup); stat = AUTH_BADCRED; goto done; } /* get the verifier */ if ((u_int)msg->rm_call.cb_verf.oa_length) { rqst->rq_xprt->xp_verf.oa_flavor = msg->rm_call.cb_verf.oa_flavor; rqst->rq_xprt->xp_verf.oa_base = msg->rm_call.cb_verf.oa_base; rqst->rq_xprt->xp_verf.oa_length = msg->rm_call.cb_verf.oa_length; } else { rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; rqst->rq_xprt->xp_verf.oa_length = 0; } stat = AUTH_OK; done: XDR_DESTROY (&xdrs); return stat; } /* * Shorthand unix authenticator * Looks up longhand in a cache. */ /*ARGSUSED */ enum auth_stat _svcauth_short (struct svc_req *rqst attribute_unused, struct rpc_msg *msg attribute_unused) attribute_hidden; enum auth_stat _svcauth_short (struct svc_req *rqst attribute_unused, struct rpc_msg *msg attribute_unused) { return AUTH_REJECTEDCRED; }