324 lines
8.4 KiB
C
324 lines
8.4 KiB
C
/*
|
|
* 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
|
|
*/
|
|
/*
|
|
* Copyright (C) 1984, Sun Microsystems, Inc.
|
|
*/
|
|
/*
|
|
* auth_unix.c, Implements UNIX style authentication parameters.
|
|
*
|
|
* 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 <limits.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <libintl.h>
|
|
#include <sys/param.h>
|
|
|
|
#include <rpc/types.h>
|
|
#include <rpc/xdr.h>
|
|
#include <rpc/auth.h>
|
|
#include <rpc/auth_unix.h>
|
|
|
|
#ifdef USE_IN_LIBIO
|
|
# include <wchar.h>
|
|
#endif
|
|
|
|
/*
|
|
* Unix authenticator operations vector
|
|
*/
|
|
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 *);
|
|
static void authunix_destroy (AUTH *);
|
|
|
|
static struct auth_ops auth_unix_ops = {
|
|
authunix_nextverf,
|
|
authunix_marshal,
|
|
authunix_validate,
|
|
authunix_refresh,
|
|
authunix_destroy
|
|
};
|
|
|
|
/*
|
|
* 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)
|
|
|
|
static bool_t marshal_new_auth (AUTH *) internal_function;
|
|
|
|
|
|
/*
|
|
* Create a unix style authenticator.
|
|
* Returns an auth handle with the given stuff in it.
|
|
*/
|
|
AUTH *
|
|
authunix_create (char *machname, uid_t uid, gid_t gid, int len,
|
|
gid_t *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
|
|
*/
|
|
auth = (AUTH *) mem_alloc (sizeof (*auth));
|
|
au = (struct audata *) mem_alloc (sizeof (*au));
|
|
if (auth == NULL || au == NULL)
|
|
{
|
|
no_memory:
|
|
#ifdef USE_IN_LIBIO
|
|
if (_IO_fwide (stderr, 0) > 0)
|
|
(void) __fwprintf (stderr, L"%s",
|
|
_("authunix_create: out of memory\n"));
|
|
else
|
|
#endif
|
|
(void) fputs (_("authunix_create: out of memory\n"), stderr);
|
|
mem_free (auth, sizeof (*auth));
|
|
mem_free (au, sizeof (*au));
|
|
return NULL;
|
|
}
|
|
auth->ah_ops = &auth_unix_ops;
|
|
auth->ah_private = (caddr_t) au;
|
|
auth->ah_verf = au->au_shcred = _null_auth;
|
|
au->au_shfaults = 0;
|
|
|
|
/*
|
|
* fill in param struct from the given params
|
|
*/
|
|
(void) __gettimeofday (&now, (struct timezone *) 0);
|
|
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
|
|
*/
|
|
INTUSE(xdrmem_create) (&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
|
|
if (!INTUSE(xdr_authunix_parms) (&xdrs, &aup))
|
|
abort ();
|
|
au->au_origcred.oa_length = len = XDR_GETPOS (&xdrs);
|
|
au->au_origcred.oa_flavor = AUTH_UNIX;
|
|
au->au_origcred.oa_base = mem_alloc ((u_int) len);
|
|
if (au->au_origcred.oa_base == NULL)
|
|
goto no_memory;
|
|
memcpy(au->au_origcred.oa_base, mymem, (u_int) len);
|
|
|
|
/*
|
|
* set auth handle to reflect new cred.
|
|
*/
|
|
auth->ah_cred = au->au_origcred;
|
|
marshal_new_auth (auth);
|
|
return auth;
|
|
}
|
|
|
|
/*
|
|
* Returns an auth handle with parameters determined by doing lots of
|
|
* syscalls.
|
|
*/
|
|
AUTH *
|
|
authunix_create_default (void)
|
|
{
|
|
int len;
|
|
char machname[MAX_MACHINE_NAME + 1];
|
|
uid_t uid;
|
|
gid_t gid;
|
|
int max_nr_groups = __sysconf (_SC_NGROUPS_MAX);
|
|
gid_t gids[max_nr_groups];
|
|
|
|
if (__gethostname (machname, MAX_MACHINE_NAME) == -1)
|
|
abort ();
|
|
machname[MAX_MACHINE_NAME] = 0;
|
|
uid = __geteuid ();
|
|
gid = __getegid ();
|
|
|
|
if ((len = __getgroups (max_nr_groups, gids)) < 0)
|
|
abort ();
|
|
/* This braindamaged Sun code forces us here to truncate the
|
|
list of groups to NGRPS members since the code in
|
|
authuxprot.c transforms a fixed array. Grrr. */
|
|
return authunix_create (machname, uid, gid, MIN (NGRPS, len), gids);
|
|
}
|
|
|
|
/*
|
|
* authunix operations
|
|
*/
|
|
|
|
static void
|
|
authunix_nextverf (AUTH *auth)
|
|
{
|
|
/* no action necessary */
|
|
}
|
|
|
|
static bool_t
|
|
authunix_marshal (AUTH *auth, XDR *xdrs)
|
|
{
|
|
struct audata *au = AUTH_PRIVATE (auth);
|
|
|
|
return XDR_PUTBYTES (xdrs, au->au_marshed, au->au_mpos);
|
|
}
|
|
|
|
static bool_t
|
|
authunix_validate (AUTH *auth, struct opaque_auth *verf)
|
|
{
|
|
struct audata *au;
|
|
XDR xdrs;
|
|
|
|
if (verf->oa_flavor == AUTH_SHORT)
|
|
{
|
|
au = AUTH_PRIVATE (auth);
|
|
INTUSE(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 (INTUSE(xdr_opaque_auth) (&xdrs, &au->au_shcred))
|
|
{
|
|
auth->ah_cred = au->au_shcred;
|
|
}
|
|
else
|
|
{
|
|
xdrs.x_op = XDR_FREE;
|
|
(void) INTUSE(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)
|
|
{
|
|
struct audata *au = AUTH_PRIVATE (auth);
|
|
struct authunix_parms aup;
|
|
struct timeval now;
|
|
XDR xdrs;
|
|
int stat;
|
|
|
|
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 = (gid_t *) NULL;
|
|
INTUSE(xdrmem_create) (&xdrs, au->au_origcred.oa_base,
|
|
au->au_origcred.oa_length, XDR_DECODE);
|
|
stat = INTUSE(xdr_authunix_parms) (&xdrs, &aup);
|
|
if (!stat)
|
|
goto done;
|
|
|
|
/* update the time and serialize in place */
|
|
(void) __gettimeofday (&now, (struct timezone *) 0);
|
|
aup.aup_time = now.tv_sec;
|
|
xdrs.x_op = XDR_ENCODE;
|
|
XDR_SETPOS (&xdrs, 0);
|
|
stat = INTUSE(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) INTUSE(xdr_authunix_parms) (&xdrs, &aup);
|
|
XDR_DESTROY (&xdrs);
|
|
return stat;
|
|
}
|
|
|
|
static void
|
|
authunix_destroy (AUTH *auth)
|
|
{
|
|
struct audata *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 ((caddr_t) auth, sizeof (*auth));
|
|
}
|
|
|
|
/*
|
|
* Marshals (pre-serializes) an auth struct.
|
|
* sets private data, au_marshed and au_mpos
|
|
*/
|
|
static bool_t
|
|
internal_function
|
|
marshal_new_auth (AUTH *auth)
|
|
{
|
|
XDR xdr_stream;
|
|
XDR *xdrs = &xdr_stream;
|
|
struct audata *au = AUTH_PRIVATE (auth);
|
|
|
|
INTUSE(xdrmem_create) (xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
|
|
if ((!INTUSE(xdr_opaque_auth) (xdrs, &(auth->ah_cred))) ||
|
|
(!INTUSE(xdr_opaque_auth) (xdrs, &(auth->ah_verf))))
|
|
perror (_("auth_none.c - Fatal marshalling problem"));
|
|
else
|
|
au->au_mpos = XDR_GETPOS (xdrs);
|
|
|
|
XDR_DESTROY (xdrs);
|
|
|
|
return TRUE;
|
|
}
|