2d0c4d6d39
This has meant very little for a long time as configure.ac just hardcoded these values depending on the current OS versions at the time. The only place where this is really 'needed' is XlationSvc.c in DtSvc so that differences between locale specifications on various versions of an OS can be accounted for. So for now, we just define those when building DtSvc. We could probably safely remove them as well with an update to the Xlate locale DB to remove ancient cruft we don't care about anymore. For various other modules, like dtlogin, dtsession, etc we just use the code that was already being used due to the hardcoded values we've had for the last 10-ish years.
428 lines
9.7 KiB
C
428 lines
9.7 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $TOG: genauth.c /main/6 1997/03/25 12:33:13 barstow $ */
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/* (c) Copyright 1997, The Open Group */
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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/*
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* @DEC_COPYRIGHT@
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*/
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/*
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* HISTORY
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* $Log$
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* Revision 1.1.2.2 1995/04/21 13:05:23 Peter_Derr
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* dtlogin auth key fixes from deltacde
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* [1995/04/14 18:03:41 Peter_Derr]
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*
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* R6 xdm code used in dtlogin.
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* [1995/04/10 16:52:31 Peter_Derr]
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*
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* Revision 1.1.3.3 1995/02/20 21:03:19 Peter_Derr
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* merge XC fix-11
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* [1995/02/20 20:13:02 Peter_Derr]
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*
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* Revision 1.1.3.2 1994/07/13 19:26:25 Peter_Derr
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* Include Wrap.h to get definitions for XDM-AUTHENTICATION-1
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* authorization mechanism.
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* [1994/07/13 12:15:59 Peter_Derr]
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*
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* $EndLog$
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*/
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#ifndef lint
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static char *rcsid = "@(#)$RCSfile: genauth.c $ $Revision: /main/6 $ (DEC) $Date: 1997/03/25 12:33:13 $";
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#endif
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/*
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Copyright (c) 1988 X Consortium
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the X Consortium shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from the X Consortium.
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*/
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/*
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* xdm - display manager daemon
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* Author: Keith Packard, MIT X Consortium
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*/
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# include <X11/Xauth.h>
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# include <X11/Xos.h>
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# include "dm.h"
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#include <errno.h>
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#ifdef X_NOT_STDC_ENV
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#define Time_t long
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extern Time_t time ();
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extern int errno;
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#else
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#include <time.h>
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#define Time_t time_t
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#endif
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#if !defined(DONT_USE_DES) && !defined(USE_CRYPT)
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# if defined(AIXV3) || defined(__FreeBSD__)
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# define USE_CRYPT
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# elif defined(__OpenBSD__)
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# define DONT_USE_DES
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# elif defined(sun)
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# define USE_CRYPT
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# endif
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# define USE_ENCRYPT
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#endif
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#ifdef HASXDMAUTH
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static unsigned char key[8];
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#else
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static long key[2];
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#endif
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static int sumFile (char *name, long sum[2]);
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#ifdef HASXDMAUTH
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// Most of this comes from XDMCP's Wrap.h header
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typedef unsigned char auth_cblock[8]; /* block size */
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typedef struct auth_ks_struct { auth_cblock _; } auth_wrapper_schedule[16];
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void _XdmcpWrapperToOddParity();
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void _XdmcpAuthSetup (auth_cblock key, auth_wrapper_schedule schedule);
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void _XdmcpAuthDoIt (auth_cblock input, auth_cblock output,
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auth_wrapper_schedule schedule, int edflag);
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static void
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longtochars (long l, unsigned char *c)
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{
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c[0] = (l >> 24) & 0xff;
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c[1] = (l >> 16) & 0xff;
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c[2] = (l >> 8) & 0xff;
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c[3] = l & 0xff;
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}
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static void
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InitXdmcpWrapper (void)
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{
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long sum[2];
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unsigned char tmpkey[8];
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/*
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* randomFile is and xdm resource not defined in dtlogin.
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*
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* if (!sumFile (randomFile, sum)) {
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*/
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if (!sumFile ("/dev/mem", sum)) {
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sum[0] = time ((Time_t *) 0);
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sum[1] = time ((Time_t *) 0);
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}
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longtochars (sum[0], tmpkey+0);
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longtochars (sum[1], tmpkey+4);
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tmpkey[0] = 0;
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_XdmcpWrapperToOddParity (tmpkey, key);
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}
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#endif /* HASXDMAUTH */
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#ifndef HASXDMAUTH
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/* A random number generator that is more unpredictable
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than that shipped with some systems.
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This code is taken from the C standard. */
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static unsigned long int next = 1;
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static int
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xdm_rand(void)
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{
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next = next * 1103515245 + 12345;
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return (unsigned int)(next/65536) % 32768;
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}
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static void
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xdm_srand(unsigned int seed)
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{
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next = seed;
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}
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#endif /* no HASXDMAUTH */
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#ifdef USE_ENCRYPT
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static void
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bitsToBytes (unsigned long bits[2], char bytes[64])
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{
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int bit, byte;
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int i;
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i = 0;
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for (byte = 0; byte < 2; byte++)
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for (bit = 0; bit < 32; bit++)
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bytes[i++] = ((bits[byte] & (1 << bit)) != 0);
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}
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#endif /* USE_ENCRYPT */
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# define FILE_LIMIT 1024 /* no more than this many buffers */
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/* for linux/csrg we use a simpler method to get 2 random longs from
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* the OS's random number device.
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*/
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#define READ_LIMIT (sizeof (long) * 2)
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static int
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sumFile (char *name, long sum[2])
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{
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long buf[2];
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int fd;
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int ret_status = 0;
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if ( (fd = open (name, 0)) < 0 )
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{
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LogError((unsigned char *) "Cannot open randomFile \"%s\", errno = %d\n",
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name, errno);
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return 0;
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}
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sum[0] = 0;
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sum[1] = 0;
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if (read(fd, (char *)buf, READ_LIMIT) != READ_LIMIT)
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{
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LogError((unsigned char *) "Could not read %d bytes from '%s'\n",
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READ_LIMIT, name);
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/* cheap fallback */
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sum[0] = (long)time((Time_t *) 0);
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sum[1] = sum[0];
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}
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else
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{
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sum[0] = buf[0];
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sum[1] = buf[1];
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ret_status = 1;
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}
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close(fd);
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return ret_status;
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}
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#undef READ_LIMIT
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void
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GenerateAuthData (char *auth, int len)
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{
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long ldata[2];
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#ifdef ITIMER_REAL
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{
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struct timeval now;
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X_GETTIMEOFDAY (&now);
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ldata[0] = now.tv_sec;
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ldata[1] = now.tv_usec;
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}
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#else
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{
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long time ();
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ldata[0] = time ((long *) 0);
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ldata[1] = getpid ();
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}
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#endif /* ITIMER_REAL */
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#ifdef HASXDMAUTH
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{
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int bit;
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int i;
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auth_wrapper_schedule schedule;
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unsigned char tdata[8];
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static int xdmcpAuthInited;
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longtochars (ldata[0], tdata+0);
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longtochars (ldata[1], tdata+4);
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if (!xdmcpAuthInited)
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{
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InitXdmcpWrapper ();
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xdmcpAuthInited = 1;
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}
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_XdmcpAuthSetup (key, schedule);
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for (i = 0; i < len; i++) {
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auth[i] = 0;
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for (bit = 1; bit < 256; bit <<= 1) {
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_XdmcpAuthDoIt (tdata, tdata, schedule, 1);
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if (tdata[0] + tdata[1] & 0x4)
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auth[i] |= bit;
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}
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}
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}
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#else
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InitCryptoKey ();
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#if defined(USE_CRYPT)
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{
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int i, j, k;
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char *result, *crypt ();
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char cdata[9];
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long sdata;
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for (j = 0; j < 2; j++)
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{
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sdata = ldata[j];
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for (i = 0; i < 4; i++)
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{
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k = j * 4 + i;
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cdata[k] = sdata & 0xff;
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if (cdata[k] == 0)
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cdata[k] = 1;
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sdata >>= 8;
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}
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}
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cdata[8] = '\0';
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for (i = 0; i < len; i += 4)
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{
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result = crypt (cdata, (const char *) key);
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k = 4;
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if (i + k > len)
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k = len - i;
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for (j = 0; j < k; j++)
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auth[i + j] = result[2 + j];
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for (j = 0; j < 8; j++)
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cdata[j] = result[2 + j];
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}
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}
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#elif defined(USE_ENCRYPT)
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{
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char key_bits[64];
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char data_bits[64];
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int bit;
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int i;
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bitsToBytes (key, key_bits);
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bitsToBytes (ldata, data_bits);
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setkey (key_bits);
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for (i = 0; i < len; i++) {
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auth[i] = 0;
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for (bit = 1; bit < 256; bit <<= 1) {
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encrypt (data_bits, 0);
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if (data_bits[bit])
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auth[i] |= bit;
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}
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}
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}
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#else
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{
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int seed;
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int value;
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int i;
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seed = (ldata[0] + key[0]) +
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((ldata[1] + key[1]) << 16);
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xdm_srand (seed);
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for (i = 0; i < len; i++)
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{
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value = xdm_rand ();
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auth[i] = (value & 0xff00) >> 8;
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}
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value = len;
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if (value > sizeof (key))
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value = sizeof (key);
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memmove( (char *) key, auth, value);
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}
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#endif
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#endif
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}
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#ifndef HASXDMAUTH
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static int cryptoInited = 0;
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int
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InitCryptoKey( void )
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{
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#if defined(__linux__)
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/* non-blocking */
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char *key_file = "/dev/urandom";
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#elif defined(CSRG_BASED) || defined(sun)
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/* non-blocking */
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char *key_file = "/dev/random";
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#else
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# warning "Using /dev/mem for random bits."
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/* JET - this seems like a really bad idea. */
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char *key_file = "/dev/mem";
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#endif
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if (cryptoInited)
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return 0;
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/*
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* If the sumFile fails to produce a result
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* use the time of day.
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*/
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if (!sumFile (key_file, key)) {
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#ifdef ITIMER_REAL
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{
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struct timeval now;
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struct timezone zone;
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gettimeofday (&now, &zone);
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key[0] = now.tv_sec;
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key[1] = now.tv_usec;
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}
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#else
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{
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long time ();
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key[0] = time ((long *) 0);
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key[1] = getpid ();
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}
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#endif
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}
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cryptoInited = 1;
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return 1;
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}
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#endif /* HASXDMAUTH */
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