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- /*
- * 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.
- */
- #define __FORCE_GLIBC
- #include <features.h>
- #include <limits.h>
- #include <stdio.h>
- #include <string.h>
- #include <unistd.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
- */
- 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;
- 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);
- 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)
- {
- 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;
- 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, (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;
- }
- 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);
- 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);
- return TRUE;
- }
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