c447342094
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
350 lines
8.7 KiB
C
350 lines
8.7 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
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/*static char *sccsid = "from: @(#)auth_unix.c 2.2 88/08/01 4.0 RPCSRC";*/
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static char *rcsid = "$FreeBSD$";
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#endif
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/*
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* auth_unix.c, Implements UNIX style authentication parameters.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* The system is very weak. The client uses no encryption for it's
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* credentials and only sends null verifiers. The server sends backs
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* null verifiers or optionally a verifier that suggests a new short hand
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* for the credentials.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/param.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <rpc/auth.h>
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#include <rpc/auth_unix.h>
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/*
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* Unix authenticator operations vector
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*/
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static void authunix_nextverf();
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static bool_t authunix_marshal();
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static bool_t authunix_validate();
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static bool_t authunix_refresh();
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static void authunix_destroy();
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static struct auth_ops auth_unix_ops = {
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authunix_nextverf,
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authunix_marshal,
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authunix_validate,
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authunix_refresh,
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authunix_destroy
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};
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/*
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* This struct is pointed to by the ah_private field of an auth_handle.
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*/
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struct audata {
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struct opaque_auth au_origcred; /* original credentials */
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struct opaque_auth au_shcred; /* short hand cred */
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u_long au_shfaults; /* short hand cache faults */
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char au_marshed[MAX_AUTH_BYTES];
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u_int au_mpos; /* xdr pos at end of marshed */
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};
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#define AUTH_PRIVATE(auth) ((struct audata *)auth->ah_private)
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static void marshal_new_auth();
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/*
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* This goop is here because some servers refuse to accept a
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* credential with more than some number (usually 8) supplementary
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* groups. Blargh!
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*/
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static int authunix_maxgrouplist = 0;
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void
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set_rpc_maxgrouplist(int num)
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{
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authunix_maxgrouplist = num;
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}
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/*
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* Create a unix style authenticator.
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* Returns an auth handle with the given stuff in it.
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*/
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AUTH *
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authunix_create(machname, uid, gid, len, aup_gids)
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char *machname;
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int uid;
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int gid;
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register int len;
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int *aup_gids;
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{
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struct authunix_parms aup;
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char mymem[MAX_AUTH_BYTES];
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struct timeval now;
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XDR xdrs;
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register AUTH *auth;
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register struct audata *au;
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/*
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* Allocate and set up auth handle
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*/
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auth = (AUTH *)mem_alloc(sizeof(*auth));
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#ifndef _KERNEL
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if (auth == NULL) {
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(void)fprintf(stderr, "authunix_create: out of memory\n");
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return (NULL);
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}
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#endif
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au = (struct audata *)mem_alloc(sizeof(*au));
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#ifndef _KERNEL
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if (au == NULL) {
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(void)fprintf(stderr, "authunix_create: out of memory\n");
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return (NULL);
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}
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#endif
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auth->ah_ops = &auth_unix_ops;
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auth->ah_private = (caddr_t)au;
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auth->ah_verf = au->au_shcred = _null_auth;
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au->au_shfaults = 0;
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/*
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* fill in param struct from the given params
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*/
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(void)gettimeofday(&now, (struct timezone *)0);
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aup.aup_time = now.tv_sec;
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aup.aup_machname = machname;
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aup.aup_uid = uid;
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aup.aup_gid = gid;
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/* GW: continuation of max group list hack */
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if(authunix_maxgrouplist != 0) {
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aup.aup_len = ((len < authunix_maxgrouplist) ? len
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: authunix_maxgrouplist);
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} else {
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aup.aup_len = (u_int)len;
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}
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aup.aup_gids = aup_gids;
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/*
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* Serialize the parameters into origcred
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*/
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xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
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if (! xdr_authunix_parms(&xdrs, &aup))
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abort();
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au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs);
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au->au_origcred.oa_flavor = AUTH_UNIX;
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#ifdef _KERNEL
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au->au_origcred.oa_base = mem_alloc((u_int) len);
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#else
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if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) {
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(void)fprintf(stderr, "authunix_create: out of memory\n");
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return (NULL);
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}
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#endif
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memcpy(au->au_origcred.oa_base, mymem, (u_int)len);
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/*
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* set auth handle to reflect new cred.
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*/
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auth->ah_cred = au->au_origcred;
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marshal_new_auth(auth);
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return (auth);
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}
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/*
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* Returns an auth handle with parameters determined by doing lots of
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* syscalls.
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*/
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AUTH *
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authunix_create_default()
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{
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register int len;
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char machname[MAX_MACHINE_NAME + 1];
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register int uid;
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register int gid;
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int gids[NGRPS];
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int i;
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gid_t real_gids[NGROUPS];
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if (gethostname(machname, MAX_MACHINE_NAME) == -1)
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abort();
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machname[MAX_MACHINE_NAME] = 0;
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uid = (int)geteuid();
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gid = (int)getegid();
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if ((len = getgroups(NGROUPS, real_gids)) < 0)
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abort();
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if(len > NGRPS) len = NGRPS; /* GW: turn `gid_t's into `int's */
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for(i = 0; i < len; i++) {
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gids[i] = (int)real_gids[i];
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}
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return (authunix_create(machname, uid, gid, len, gids));
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}
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/*
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* authunix operations
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*/
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static void
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authunix_nextverf(auth)
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AUTH *auth;
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{
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/* no action necessary */
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}
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static bool_t
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authunix_marshal(auth, xdrs)
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AUTH *auth;
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XDR *xdrs;
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{
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register struct audata *au = AUTH_PRIVATE(auth);
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return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
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}
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static bool_t
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authunix_validate(auth, verf)
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register AUTH *auth;
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struct opaque_auth verf;
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{
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register struct audata *au;
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XDR xdrs;
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if (verf.oa_flavor == AUTH_SHORT) {
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au = AUTH_PRIVATE(auth);
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xdrmem_create(&xdrs, verf.oa_base, verf.oa_length, XDR_DECODE);
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if (au->au_shcred.oa_base != NULL) {
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mem_free(au->au_shcred.oa_base,
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au->au_shcred.oa_length);
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au->au_shcred.oa_base = NULL;
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}
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if (xdr_opaque_auth(&xdrs, &au->au_shcred)) {
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auth->ah_cred = au->au_shcred;
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} else {
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xdrs.x_op = XDR_FREE;
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(void)xdr_opaque_auth(&xdrs, &au->au_shcred);
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au->au_shcred.oa_base = NULL;
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auth->ah_cred = au->au_origcred;
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}
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marshal_new_auth(auth);
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}
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return (TRUE);
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}
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static bool_t
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authunix_refresh(auth)
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register AUTH *auth;
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{
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register struct audata *au = AUTH_PRIVATE(auth);
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struct authunix_parms aup;
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struct timeval now;
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XDR xdrs;
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register int stat;
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if (auth->ah_cred.oa_base == au->au_origcred.oa_base) {
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/* there is no hope. Punt */
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return (FALSE);
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}
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au->au_shfaults ++;
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/* first deserialize the creds back into a struct authunix_parms */
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aup.aup_machname = NULL;
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aup.aup_gids = (int *)NULL;
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xdrmem_create(&xdrs, au->au_origcred.oa_base,
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au->au_origcred.oa_length, XDR_DECODE);
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stat = xdr_authunix_parms(&xdrs, &aup);
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if (! stat)
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goto done;
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/* update the time and serialize in place */
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(void)gettimeofday(&now, (struct timezone *)0);
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aup.aup_time = now.tv_sec;
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xdrs.x_op = XDR_ENCODE;
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XDR_SETPOS(&xdrs, 0);
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stat = xdr_authunix_parms(&xdrs, &aup);
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if (! stat)
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goto done;
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auth->ah_cred = au->au_origcred;
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marshal_new_auth(auth);
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done:
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/* free the struct authunix_parms created by deserializing */
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xdrs.x_op = XDR_FREE;
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(void)xdr_authunix_parms(&xdrs, &aup);
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XDR_DESTROY(&xdrs);
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return (stat);
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}
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static void
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authunix_destroy(auth)
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register AUTH *auth;
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{
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register struct audata *au = AUTH_PRIVATE(auth);
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mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length);
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if (au->au_shcred.oa_base != NULL)
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mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length);
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mem_free(auth->ah_private, sizeof(struct audata));
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if (auth->ah_verf.oa_base != NULL)
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mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length);
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mem_free((caddr_t)auth, sizeof(*auth));
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}
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/*
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* Marshals (pre-serializes) an auth struct.
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* sets private data, au_marshed and au_mpos
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*/
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static void
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marshal_new_auth(auth)
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register AUTH *auth;
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{
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XDR xdr_stream;
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register XDR *xdrs = &xdr_stream;
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register struct audata *au = AUTH_PRIVATE(auth);
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xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
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if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) ||
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(! xdr_opaque_auth(xdrs, &(auth->ah_verf)))) {
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perror("auth_none.c - Fatal marshalling problem");
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} else {
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au->au_mpos = XDR_GETPOS(xdrs);
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}
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XDR_DESTROY(xdrs);
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}
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