#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$Id: auth_unix.c,v 1.4 2002/02/19 20:36:22 epeyton Exp $";
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>
#include <rpc/auth_unix.h>
extern bool_t xdr_opaque_auth();
static void authunix_nextverf();
static bool_t authunix_marshal();
static bool_t authunix_validate();
static bool_t authunix_refresh();
static void authunix_destroy();
static struct auth_ops auth_unix_ops = {
authunix_nextverf,
authunix_marshal,
authunix_validate,
authunix_refresh,
authunix_destroy
};
struct audata {
struct opaque_auth au_origcred;
struct opaque_auth au_shcred;
#ifdef __LP64__
uint32_t au_shfaults;
#else
u_long au_shfaults;
#endif
char au_marshed[MAX_AUTH_BYTES];
u_int au_mpos;
};
#define AUTH_PRIVATE(auth) ((struct audata *)auth->ah_private)
static void marshal_new_auth();
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;
auth = (AUTH *)mem_alloc(sizeof(*auth));
#ifndef KERNEL
if (auth == NULL) {
(void)fprintf(stderr, "authunix_create: out of memory\n");
return (NULL);
}
#endif
au = (struct audata *)mem_alloc(sizeof(*au));
#ifndef KERNEL
if (au == NULL) {
mem_free(auth, sizeof(*auth));
(void)fprintf(stderr, "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;
(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;
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) {
mem_free(auth, sizeof(*auth));
mem_free(au, sizeof(*au));
(void)fprintf(stderr, "authunix_create: out of memory\n");
return (NULL);
}
#endif
bcopy(mymem, au->au_origcred.oa_base, (u_int)len);
auth->ah_cred = au->au_origcred;
marshal_new_auth(auth);
return (auth);
}
static int maxgrplist = NGROUPS;
void
set_rpc_maxgrouplist(num)
int num;
{
if (num < NGROUPS)
maxgrplist = num;
}
AUTH *
authunix_create_default()
{
register int len;
char machname[MAX_MACHINE_NAME + 1];
register int uid;
register int gid;
gid_t gids[NGROUPS];
if (gethostname(machname, MAX_MACHINE_NAME) == -1)
abort();
machname[MAX_MACHINE_NAME] = 0;
uid = geteuid();
gid = getegid();
if ((len = getgroups(NGROUPS, gids)) < 0)
abort();
if (len > maxgrplist) {
len = maxgrplist;
}
return (authunix_create(machname, uid, gid, len, (int *)gids));
}
static void
authunix_nextverf(auth)
AUTH *auth;
{
}
static bool_t
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));
}
static bool_t
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);
}
static bool_t
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) {
return (FALSE);
}
au->au_shfaults ++;
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;
(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:
xdrs.x_op = XDR_FREE;
(void)xdr_authunix_parms(&xdrs, &aup);
XDR_DESTROY(&xdrs);
return (stat);
}
static void
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));
}
static void
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);
}