8360efbd6c
associated changes that had to happen to make this possible as well as bugs fixed along the way. Bring in required TLI library routines to support this. Since we don't support TLI we've essentially copied what NetBSD has done, adding a thin layer to emulate direct the TLI calls into BSD socket calls. This is mostly from Sun's tirpc release that was made in 1994, however some fixes were backported from the 1999 release (supposedly only made available after this porting effort was underway). The submitter has agreed to continue on and bring us up to the 1999 release. Several key features are introduced with this update: Client calls are thread safe. (1999 code has server side thread safe) Updated, a more modern interface. Many userland updates were done to bring the code up to par with the recent RPC API. There is an update to the pthreads library, a function pthread_main_np() was added to emulate a function of Sun's threads library. While we're at it, bring in NetBSD's lockd, it's been far too long of a wait. New rpcbind(8) replaces portmap(8) (supporting communication over an authenticated Unix-domain socket, and by default only allowing set and unset requests over that channel). It's much more secure than the old portmapper. Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded to support TI-RPC and to support IPV6. Umount(8) is also fixed to unmount pathnames longer than 80 chars, which are currently truncated by the Kernel statfs structure. Submitted by: Martin Blapp <mb@imp.ch> Manpage review: ru Secure RPC implemented by: wpaul
374 lines
9.0 KiB
C
374 lines
9.0 KiB
C
/* $NetBSD: auth_unix.c,v 1.18 2000/07/06 03:03:30 christos Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *rcsid = "$FreeBSD$";
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static char *sccsid = "@(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)auth_unix.c 2.2 88/08/01 4.0 RPCSRC";
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#endif
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/*
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* auth_unix.c, Implements UNIX style authentication parameters.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* The system is very weak. The client uses no encryption for it's
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* credentials and only sends null verifiers. The server sends backs
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* null verifiers or optionally a verifier that suggests a new short hand
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* for the credentials.
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*
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*/
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#include "reentrant.h"
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#include "namespace.h"
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#include <sys/param.h>
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#include <assert.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <rpc/auth.h>
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#include <rpc/auth_unix.h>
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#include "un-namespace.h"
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/* auth_unix.c */
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static void authunix_nextverf (AUTH *);
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static bool_t authunix_marshal (AUTH *, XDR *);
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static bool_t authunix_validate (AUTH *, struct opaque_auth *);
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static bool_t authunix_refresh (AUTH *, void *);
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static void authunix_destroy (AUTH *);
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static void marshal_new_auth (AUTH *);
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static struct auth_ops *authunix_ops (void);
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/*
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* This struct is pointed to by the ah_private field of an auth_handle.
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*/
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struct audata {
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struct opaque_auth au_origcred; /* original credentials */
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struct opaque_auth au_shcred; /* short hand cred */
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u_long au_shfaults; /* short hand cache faults */
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char au_marshed[MAX_AUTH_BYTES];
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u_int au_mpos; /* xdr pos at end of marshed */
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};
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#define AUTH_PRIVATE(auth) ((struct audata *)auth->ah_private)
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/*
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* Create a unix style authenticator.
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* Returns an auth handle with the given stuff in it.
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*/
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AUTH *
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authunix_create(machname, uid, gid, len, aup_gids)
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char *machname;
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int uid;
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int gid;
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int len;
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int *aup_gids;
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{
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struct authunix_parms aup;
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char mymem[MAX_AUTH_BYTES];
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struct timeval now;
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XDR xdrs;
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AUTH *auth;
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struct audata *au;
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/*
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* Allocate and set up auth handle
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*/
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au = NULL;
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auth = mem_alloc(sizeof(*auth));
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#ifndef _KERNEL
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if (auth == NULL) {
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warnx("authunix_create: out of memory");
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goto cleanup_authunix_create;
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}
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#endif
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au = mem_alloc(sizeof(*au));
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#ifndef _KERNEL
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if (au == NULL) {
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warnx("authunix_create: out of memory");
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goto cleanup_authunix_create;
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}
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#endif
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auth->ah_ops = authunix_ops();
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auth->ah_private = (caddr_t)au;
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auth->ah_verf = au->au_shcred = _null_auth;
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au->au_shfaults = 0;
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au->au_origcred.oa_base = NULL;
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/*
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* fill in param struct from the given params
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*/
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(void)gettimeofday(&now, NULL);
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aup.aup_time = now.tv_sec;
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aup.aup_machname = machname;
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aup.aup_uid = uid;
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aup.aup_gid = gid;
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aup.aup_len = (u_int)len;
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aup.aup_gids = aup_gids;
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/*
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* Serialize the parameters into origcred
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*/
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xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
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if (! xdr_authunix_parms(&xdrs, &aup))
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abort();
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au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs);
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au->au_origcred.oa_flavor = AUTH_UNIX;
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#ifdef _KERNEL
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au->au_origcred.oa_base = mem_alloc((u_int) len);
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#else
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if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) {
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warnx("authunix_create: out of memory");
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goto cleanup_authunix_create;
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}
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#endif
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memmove(au->au_origcred.oa_base, mymem, (size_t)len);
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/*
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* set auth handle to reflect new cred.
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*/
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auth->ah_cred = au->au_origcred;
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marshal_new_auth(auth);
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return (auth);
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#ifndef _KERNEL
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cleanup_authunix_create:
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if (auth)
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mem_free(auth, sizeof(*auth));
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if (au) {
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if (au->au_origcred.oa_base)
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mem_free(au->au_origcred.oa_base, (u_int)len);
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mem_free(au, sizeof(*au));
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}
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return (NULL);
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#endif
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}
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/*
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* Returns an auth handle with parameters determined by doing lots of
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* syscalls.
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*/
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AUTH *
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authunix_create_default()
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{
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int len;
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char machname[MAXHOSTNAMELEN + 1];
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uid_t uid;
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gid_t gid;
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gid_t gids[NGRPS];
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if (gethostname(machname, sizeof machname) == -1)
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abort();
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machname[sizeof(machname) - 1] = 0;
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uid = geteuid();
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gid = getegid();
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if ((len = getgroups(NGRPS, gids)) < 0)
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abort();
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/* XXX: interface problem; those should all have been unsigned */
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return (authunix_create(machname, (int)uid, (int)gid, len,
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(int *)gids));
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}
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/*
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* authunix operations
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*/
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/* ARGSUSED */
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static void
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authunix_nextverf(auth)
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AUTH *auth;
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{
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/* no action necessary */
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}
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static bool_t
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authunix_marshal(auth, xdrs)
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AUTH *auth;
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XDR *xdrs;
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{
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struct audata *au;
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assert(auth != NULL);
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assert(xdrs != NULL);
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au = AUTH_PRIVATE(auth);
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return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
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}
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static bool_t
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authunix_validate(auth, verf)
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AUTH *auth;
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struct opaque_auth *verf;
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{
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struct audata *au;
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XDR xdrs;
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assert(auth != NULL);
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assert(verf != NULL);
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if (verf->oa_flavor == AUTH_SHORT) {
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au = AUTH_PRIVATE(auth);
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xdrmem_create(&xdrs, verf->oa_base, verf->oa_length,
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XDR_DECODE);
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if (au->au_shcred.oa_base != NULL) {
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mem_free(au->au_shcred.oa_base,
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au->au_shcred.oa_length);
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au->au_shcred.oa_base = NULL;
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}
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if (xdr_opaque_auth(&xdrs, &au->au_shcred)) {
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auth->ah_cred = au->au_shcred;
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} else {
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xdrs.x_op = XDR_FREE;
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(void)xdr_opaque_auth(&xdrs, &au->au_shcred);
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au->au_shcred.oa_base = NULL;
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auth->ah_cred = au->au_origcred;
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}
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marshal_new_auth(auth);
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}
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return (TRUE);
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}
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static bool_t
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authunix_refresh(AUTH *auth, void *dummy)
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{
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struct audata *au = AUTH_PRIVATE(auth);
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struct authunix_parms aup;
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struct timeval now;
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XDR xdrs;
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int stat;
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assert(auth != NULL);
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if (auth->ah_cred.oa_base == au->au_origcred.oa_base) {
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/* there is no hope. Punt */
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return (FALSE);
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}
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au->au_shfaults ++;
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/* first deserialize the creds back into a struct authunix_parms */
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aup.aup_machname = NULL;
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aup.aup_gids = NULL;
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xdrmem_create(&xdrs, au->au_origcred.oa_base,
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au->au_origcred.oa_length, XDR_DECODE);
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stat = xdr_authunix_parms(&xdrs, &aup);
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if (! stat)
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goto done;
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/* update the time and serialize in place */
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(void)gettimeofday(&now, NULL);
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aup.aup_time = now.tv_sec;
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xdrs.x_op = XDR_ENCODE;
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XDR_SETPOS(&xdrs, 0);
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stat = xdr_authunix_parms(&xdrs, &aup);
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if (! stat)
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goto done;
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auth->ah_cred = au->au_origcred;
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marshal_new_auth(auth);
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done:
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/* free the struct authunix_parms created by deserializing */
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xdrs.x_op = XDR_FREE;
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(void)xdr_authunix_parms(&xdrs, &aup);
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XDR_DESTROY(&xdrs);
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return (stat);
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}
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static void
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authunix_destroy(auth)
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AUTH *auth;
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{
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struct audata *au;
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assert(auth != NULL);
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au = AUTH_PRIVATE(auth);
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mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length);
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if (au->au_shcred.oa_base != NULL)
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mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length);
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mem_free(auth->ah_private, sizeof(struct audata));
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if (auth->ah_verf.oa_base != NULL)
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mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length);
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mem_free(auth, sizeof(*auth));
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}
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/*
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* Marshals (pre-serializes) an auth struct.
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* sets private data, au_marshed and au_mpos
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*/
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static void
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marshal_new_auth(auth)
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AUTH *auth;
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{
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XDR xdr_stream;
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XDR *xdrs = &xdr_stream;
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struct audata *au;
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assert(auth != NULL);
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au = AUTH_PRIVATE(auth);
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xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
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if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) ||
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(! xdr_opaque_auth(xdrs, &(auth->ah_verf))))
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warnx("auth_none.c - Fatal marshalling problem");
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else
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au->au_mpos = XDR_GETPOS(xdrs);
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XDR_DESTROY(xdrs);
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}
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static struct auth_ops *
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authunix_ops()
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{
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static struct auth_ops ops;
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extern mutex_t ops_lock;
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/* VARIABLES PROTECTED BY ops_lock: ops */
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mutex_lock(&ops_lock);
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if (ops.ah_nextverf == NULL) {
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ops.ah_nextverf = authunix_nextverf;
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ops.ah_marshal = authunix_marshal;
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ops.ah_validate = authunix_validate;
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ops.ah_refresh = authunix_refresh;
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ops.ah_destroy = authunix_destroy;
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}
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mutex_unlock(&ops_lock);
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return (&ops);
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}
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