374 lines
8.9 KiB
C
374 lines
8.9 KiB
C
/* $NetBSD: auth_unix.c,v 1.18 2000/07/06 03:03:30 christos Exp $ */
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char *sccsid2 = "@(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro";
|
|
static char *sccsid = "@(#)auth_unix.c 2.2 88/08/01 4.0 RPCSRC";
|
|
#endif
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* auth_unix.c, Implements UNIX style authentication parameters.
|
|
*
|
|
* Copyright (C) 1984, Sun Microsystems, Inc.
|
|
*
|
|
* The system is very weak. The client uses no encryption for it's
|
|
* credentials and only sends null verifiers. The server sends backs
|
|
* null verifiers or optionally a verifier that suggests a new short hand
|
|
* for the credentials.
|
|
*
|
|
*/
|
|
|
|
#include "namespace.h"
|
|
#include "reentrant.h"
|
|
#include <sys/param.h>
|
|
|
|
#include <assert.h>
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
|
|
#include <rpc/types.h>
|
|
#include <rpc/xdr.h>
|
|
#include <rpc/auth.h>
|
|
#include <rpc/auth_unix.h>
|
|
#include "un-namespace.h"
|
|
#include "mt_misc.h"
|
|
|
|
/* auth_unix.c */
|
|
static void authunix_nextverf (AUTH *);
|
|
static bool_t authunix_marshal (AUTH *, XDR *);
|
|
static bool_t authunix_validate (AUTH *, struct opaque_auth *);
|
|
static bool_t authunix_refresh (AUTH *, void *);
|
|
static void authunix_destroy (AUTH *);
|
|
static void marshal_new_auth (AUTH *);
|
|
static struct auth_ops *authunix_ops (void);
|
|
|
|
/*
|
|
* This struct is pointed to by the ah_private field of an auth_handle.
|
|
*/
|
|
struct audata {
|
|
struct opaque_auth au_origcred; /* original credentials */
|
|
struct opaque_auth au_shcred; /* short hand cred */
|
|
u_long au_shfaults; /* short hand cache faults */
|
|
char au_marshed[MAX_AUTH_BYTES];
|
|
u_int au_mpos; /* xdr pos at end of marshed */
|
|
};
|
|
#define AUTH_PRIVATE(auth) ((struct audata *)auth->ah_private)
|
|
|
|
/*
|
|
* Create a unix style authenticator.
|
|
* Returns an auth handle with the given stuff in it.
|
|
*/
|
|
AUTH *
|
|
authunix_create(machname, uid, gid, len, aup_gids)
|
|
char *machname;
|
|
int uid;
|
|
int gid;
|
|
int len;
|
|
int *aup_gids;
|
|
{
|
|
struct authunix_parms aup;
|
|
char mymem[MAX_AUTH_BYTES];
|
|
struct timeval now;
|
|
XDR xdrs;
|
|
AUTH *auth;
|
|
struct audata *au;
|
|
|
|
/*
|
|
* Allocate and set up auth handle
|
|
*/
|
|
au = NULL;
|
|
auth = mem_alloc(sizeof(*auth));
|
|
#ifndef _KERNEL
|
|
if (auth == NULL) {
|
|
warnx("authunix_create: out of memory");
|
|
goto cleanup_authunix_create;
|
|
}
|
|
#endif
|
|
au = mem_alloc(sizeof(*au));
|
|
#ifndef _KERNEL
|
|
if (au == NULL) {
|
|
warnx("authunix_create: out of memory");
|
|
goto cleanup_authunix_create;
|
|
}
|
|
#endif
|
|
auth->ah_ops = authunix_ops();
|
|
auth->ah_private = (caddr_t)au;
|
|
auth->ah_verf = au->au_shcred = _null_auth;
|
|
au->au_shfaults = 0;
|
|
au->au_origcred.oa_base = NULL;
|
|
|
|
/*
|
|
* fill in param struct from the given params
|
|
*/
|
|
(void)gettimeofday(&now, NULL);
|
|
aup.aup_time = now.tv_sec;
|
|
aup.aup_machname = machname;
|
|
aup.aup_uid = uid;
|
|
aup.aup_gid = gid;
|
|
aup.aup_len = (u_int)len;
|
|
aup.aup_gids = aup_gids;
|
|
|
|
/*
|
|
* Serialize the parameters into origcred
|
|
*/
|
|
xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
|
|
if (! xdr_authunix_parms(&xdrs, &aup))
|
|
abort();
|
|
au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs);
|
|
au->au_origcred.oa_flavor = AUTH_UNIX;
|
|
#ifdef _KERNEL
|
|
au->au_origcred.oa_base = mem_alloc((u_int) len);
|
|
#else
|
|
if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) {
|
|
warnx("authunix_create: out of memory");
|
|
goto cleanup_authunix_create;
|
|
}
|
|
#endif
|
|
memmove(au->au_origcred.oa_base, mymem, (size_t)len);
|
|
|
|
/*
|
|
* set auth handle to reflect new cred.
|
|
*/
|
|
auth->ah_cred = au->au_origcred;
|
|
marshal_new_auth(auth);
|
|
return (auth);
|
|
#ifndef _KERNEL
|
|
cleanup_authunix_create:
|
|
if (auth)
|
|
mem_free(auth, sizeof(*auth));
|
|
if (au) {
|
|
if (au->au_origcred.oa_base)
|
|
mem_free(au->au_origcred.oa_base, (u_int)len);
|
|
mem_free(au, sizeof(*au));
|
|
}
|
|
return (NULL);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Returns an auth handle with parameters determined by doing lots of
|
|
* syscalls.
|
|
*/
|
|
AUTH *
|
|
authunix_create_default()
|
|
{
|
|
int len;
|
|
char machname[MAXHOSTNAMELEN + 1];
|
|
uid_t uid;
|
|
gid_t gid;
|
|
gid_t gids[NGRPS];
|
|
|
|
if (gethostname(machname, sizeof machname) == -1)
|
|
abort();
|
|
machname[sizeof(machname) - 1] = 0;
|
|
uid = geteuid();
|
|
gid = getegid();
|
|
if ((len = getgroups(NGRPS, gids)) < 0)
|
|
abort();
|
|
/* XXX: interface problem; those should all have been unsigned */
|
|
return (authunix_create(machname, (int)uid, (int)gid, len,
|
|
(int *)gids));
|
|
}
|
|
|
|
/*
|
|
* authunix operations
|
|
*/
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
authunix_nextverf(auth)
|
|
AUTH *auth;
|
|
{
|
|
/* no action necessary */
|
|
}
|
|
|
|
static bool_t
|
|
authunix_marshal(auth, xdrs)
|
|
AUTH *auth;
|
|
XDR *xdrs;
|
|
{
|
|
struct audata *au;
|
|
|
|
assert(auth != NULL);
|
|
assert(xdrs != NULL);
|
|
|
|
au = AUTH_PRIVATE(auth);
|
|
return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
|
|
}
|
|
|
|
static bool_t
|
|
authunix_validate(auth, verf)
|
|
AUTH *auth;
|
|
struct opaque_auth *verf;
|
|
{
|
|
struct audata *au;
|
|
XDR xdrs;
|
|
|
|
assert(auth != NULL);
|
|
assert(verf != NULL);
|
|
|
|
if (verf->oa_flavor == AUTH_SHORT) {
|
|
au = AUTH_PRIVATE(auth);
|
|
xdrmem_create(&xdrs, verf->oa_base, verf->oa_length,
|
|
XDR_DECODE);
|
|
|
|
if (au->au_shcred.oa_base != NULL) {
|
|
mem_free(au->au_shcred.oa_base,
|
|
au->au_shcred.oa_length);
|
|
au->au_shcred.oa_base = NULL;
|
|
}
|
|
if (xdr_opaque_auth(&xdrs, &au->au_shcred)) {
|
|
auth->ah_cred = au->au_shcred;
|
|
} else {
|
|
xdrs.x_op = XDR_FREE;
|
|
(void)xdr_opaque_auth(&xdrs, &au->au_shcred);
|
|
au->au_shcred.oa_base = NULL;
|
|
auth->ah_cred = au->au_origcred;
|
|
}
|
|
marshal_new_auth(auth);
|
|
}
|
|
return (TRUE);
|
|
}
|
|
|
|
static bool_t
|
|
authunix_refresh(AUTH *auth, void *dummy)
|
|
{
|
|
struct audata *au = AUTH_PRIVATE(auth);
|
|
struct authunix_parms aup;
|
|
struct timeval now;
|
|
XDR xdrs;
|
|
int stat;
|
|
|
|
assert(auth != NULL);
|
|
|
|
if (auth->ah_cred.oa_base == au->au_origcred.oa_base) {
|
|
/* there is no hope. Punt */
|
|
return (FALSE);
|
|
}
|
|
au->au_shfaults ++;
|
|
|
|
/* first deserialize the creds back into a struct authunix_parms */
|
|
aup.aup_machname = NULL;
|
|
aup.aup_gids = NULL;
|
|
xdrmem_create(&xdrs, au->au_origcred.oa_base,
|
|
au->au_origcred.oa_length, XDR_DECODE);
|
|
stat = xdr_authunix_parms(&xdrs, &aup);
|
|
if (! stat)
|
|
goto done;
|
|
|
|
/* update the time and serialize in place */
|
|
(void)gettimeofday(&now, NULL);
|
|
aup.aup_time = now.tv_sec;
|
|
xdrs.x_op = XDR_ENCODE;
|
|
XDR_SETPOS(&xdrs, 0);
|
|
stat = xdr_authunix_parms(&xdrs, &aup);
|
|
if (! stat)
|
|
goto done;
|
|
auth->ah_cred = au->au_origcred;
|
|
marshal_new_auth(auth);
|
|
done:
|
|
/* free the struct authunix_parms created by deserializing */
|
|
xdrs.x_op = XDR_FREE;
|
|
(void)xdr_authunix_parms(&xdrs, &aup);
|
|
XDR_DESTROY(&xdrs);
|
|
return (stat);
|
|
}
|
|
|
|
static void
|
|
authunix_destroy(auth)
|
|
AUTH *auth;
|
|
{
|
|
struct audata *au;
|
|
|
|
assert(auth != NULL);
|
|
|
|
au = AUTH_PRIVATE(auth);
|
|
mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length);
|
|
|
|
if (au->au_shcred.oa_base != NULL)
|
|
mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length);
|
|
|
|
mem_free(auth->ah_private, sizeof(struct audata));
|
|
|
|
if (auth->ah_verf.oa_base != NULL)
|
|
mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length);
|
|
|
|
mem_free(auth, sizeof(*auth));
|
|
}
|
|
|
|
/*
|
|
* Marshals (pre-serializes) an auth struct.
|
|
* sets private data, au_marshed and au_mpos
|
|
*/
|
|
static void
|
|
marshal_new_auth(auth)
|
|
AUTH *auth;
|
|
{
|
|
XDR xdr_stream;
|
|
XDR *xdrs = &xdr_stream;
|
|
struct audata *au;
|
|
|
|
assert(auth != NULL);
|
|
|
|
au = AUTH_PRIVATE(auth);
|
|
xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
|
|
if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) ||
|
|
(! xdr_opaque_auth(xdrs, &(auth->ah_verf))))
|
|
warnx("auth_none.c - Fatal marshalling problem");
|
|
else
|
|
au->au_mpos = XDR_GETPOS(xdrs);
|
|
XDR_DESTROY(xdrs);
|
|
}
|
|
|
|
static struct auth_ops *
|
|
authunix_ops()
|
|
{
|
|
static struct auth_ops ops;
|
|
|
|
/* VARIABLES PROTECTED BY ops_lock: ops */
|
|
|
|
mutex_lock(&ops_lock);
|
|
if (ops.ah_nextverf == NULL) {
|
|
ops.ah_nextverf = authunix_nextverf;
|
|
ops.ah_marshal = authunix_marshal;
|
|
ops.ah_validate = authunix_validate;
|
|
ops.ah_refresh = authunix_refresh;
|
|
ops.ah_destroy = authunix_destroy;
|
|
}
|
|
mutex_unlock(&ops_lock);
|
|
return (&ops);
|
|
}
|