/* auth_unix.c - implements UNIX style authentication parameters *//* Copyright 1984-2000 Wind River Systems, Inc. */#include "copyright_wrs.h"/* * Copyright (c) 1987 Wind River Systems, Inc. * Copyright (C) 1984, Sun Microsystems, Inc. * * 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 *//*modification history--------------------01q,23oct01,rae  fixed SPR #7100801p,18apr00,ham  fixed compilation warnings.01o,26may92,rrr  the tree shuffle01n,04oct91,rrr  passed through the ansification filter		  -changed includes to have absolute path from h/		  -fixed #else and #endif		  -changed copyright notice01m,25oct90,dnw   removed include of utime.h.01l,15jul90,dnw   coerced mem_alloc() to (char*) where necessary01k,11may90,yao   added missing modification history (01i) for the last checkin.01i,09may90,yao   deleted declaration of malloc.01h,19apr90,hjb   de-linted.01g,27oct89,hjb   upgraded to 4.001f,04jun88,llk   got rid of "bizarre behavior" message in _create and _refresh.01e,05apr88,gae   changed fprintf() to printErr().01d,04jan88,rdc   kludged the date in authunix_create for nfs.01c,11nov87,jlf   added wrs copyright, title, mod history, etc.01b,06nov87,dnw   changed conditionals on KERNEL to DONT_PRINT_ERRORS.01a,01nov87,rdc   first VxWorks version*//* * 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 "rpc/rpctypes.h"#include "rpc/xdr.h"#include "rpc/auth.h"#include "rpc/auth_unix.h"#include "vxWorks.h"#include "memLib.h"#include "stdio.h"#include "stdlib.h"#include "string.h"IMPORT bool_t xdr_opaque_auth ();/* * Unix authenticator operations vector */LOCAL void	authunix_nextverf();			/* 4.0 */LOCAL bool_t	authunix_marshal();			/* 4.0 */LOCAL bool_t	authunix_validate();			/* 4.0 */LOCAL bool_t	authunix_refresh();			/* 4.0 */LOCAL void	authunix_destroy();			/* 4.0 */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)LOCAL void marshal_new_auth();			/* 4.0 *//* * 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;	register int len;	int *aup_gids;{	struct authunix_parms aup;	char mymem[MAX_AUTH_BYTES];	/*struct timeval now;*/	XDR xdrs;	register AUTH *auth;	register struct audata *au;	/*	 * Allocate and set up auth handle	 */	auth = (AUTH *)mem_alloc(sizeof(*auth));#ifndef DONT_PRINT_ERRORS	if (auth == NULL) {		printErr ("authunix_create: out of memory\n");		return (NULL);	}#endif	au = (struct audata *)mem_alloc(sizeof(*au));#ifndef DONT_PRINT_ERRORS	if (au == NULL) {		printErr ("authunix_create: out of memory\n");		return (NULL);	}#endif	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	 */	/* WARNING: gettimeofday unimplemented - be wary of bizarre behavior. */	/* XXX (void)gettimeofday(&now,  (struct timezone *)0); */	/* XXX aup.aup_time = now.tv_sec; */	aup.aup_time = 10000;	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 DONT_PRINT_ERRORS	au->au_origcred.oa_base = (char *) mem_alloc(len);#else	if ((au->au_origcred.oa_base = (char *) mem_alloc((unsigned) len)) ==									NULL) {		printErr ("authunix_create: out of memory\n");		return (NULL);	}#endif	bcopy(mymem, au->au_origcred.oa_base, len);	/*	 * set auth handle to reflect new cred.	 */	auth->ah_cred = au->au_origcred;	marshal_new_auth(auth);	return (auth);}/* XXX We're not going to support this - it's too hard. */#if FALSE/* * Returns an auth handle with parameters determined by doing lots of * syscalls. */AUTH *authunix_create_default(){	register int len;	char machname[MAX_MACHINE_NAME + 1];	register int uid;	register int gid;	int gids[NGRPS];	if (gethostname(machname, MAX_MACHINE_NAME) == -1)		abort();	machname[MAX_MACHINE_NAME] = 0;	uid = geteuid();	gid = getegid();	if ((len = getgroups(NGRPS, gids)) < 0)		abort();	return (authunix_create(machname, uid, gid, len, gids));}#endif	/* FALSE *//* * authunix operations *//* ARGSUSED0 */LOCAL void			/* 4.0 */authunix_nextverf(auth)	AUTH *auth;{	/* no action necessary */}LOCAL bool_t			/* 4.0 */authunix_marshal(auth, xdrs)	AUTH *auth;	XDR *xdrs;{	register struct audata *au = AUTH_PRIVATE(auth);	return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));}LOCAL bool_t			/* 4.0 */authunix_validate(auth, verf)	register AUTH *auth;	struct opaque_auth *verf;{	register struct audata *au;	XDR xdrs;	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);}LOCAL bool_t			/* 4.0 */authunix_refresh(auth)	register AUTH *auth;{	register struct audata *au = AUTH_PRIVATE(auth);	struct authunix_parms aup;	struct timeval now;	XDR xdrs;	register 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 = (int *)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 */	/* WARNING: gettimeofday unimplemented - be wary of bizarre behavior. */	/* XXX (void)gettimeofday(&now, (struct timezone *)0); */	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);}LOCAL void			/* 4.0 */authunix_destroy(auth)	register AUTH *auth;{	register 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 */LOCAL void			/* 4.0 */marshal_new_auth(auth)	register AUTH *auth;{	XDR		xdr_stream;	register XDR	*xdrs = &xdr_stream;	register struct audata *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)))) {		perror("auth_none.c - Fatal marshalling problem");	} else {		au->au_mpos = XDR_GETPOS(xdrs);	}	XDR_DESTROY(xdrs);}