+++ /dev/null
-/*
- * $XConsortium: Wrap.c,v 1.9 94/04/17 20:16:48 keith Exp $
- *
- *
-Copyright (c) 1989 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.
- * *
- * Author: Keith Packard, MIT X Consortium
- */
-
-#include <X11/Xos.h>
-#include <X11/X.h>
-#include <X11/Xmd.h>
-#include <X11/Xdmcp.h>
-
-#ifdef HASXDMAUTH
-
-/*
- * The following function exists only to demonstrate the
- * desired functional interface for this routine. You will
- * need to add the appropriate algorithm if you wish to
- * use XDM-AUTHENTICATION-1/XDM-AUTHORIZATION-1.
- *
- * Examine the XDMCP specification for the correct algorithm
- */
-
-#include "Wrap.h"
-
-void
-XdmcpWrap (input, wrapper, output, bytes)
- unsigned char *input, *output;
- unsigned char *wrapper;
- int bytes;
-{
- int i, j;
- int len;
- unsigned char tmp[8];
- unsigned char expand_wrapper[8];
- auth_wrapper_schedule schedule;
-
- _XdmcpWrapperToOddParity (wrapper, expand_wrapper);
- _XdmcpAuthSetup (expand_wrapper, schedule);
- for (j = 0; j < bytes; j += 8)
- {
- len = 8;
- if (bytes - j < len)
- len = bytes - j;
- /* block chaining */
- for (i = 0; i < len; i++)
- {
- if (j == 0)
- tmp[i] = input[i];
- else
- tmp[i] = input[j + i] ^ output[j - 8 + i];
- }
- for (; i < 8; i++)
- {
- if (j == 0)
- tmp[i] = 0;
- else
- tmp[i] = 0 ^ output[j - 8 + i];
- }
- _XdmcpAuthDoIt (tmp, (output + j), schedule, 1);
- }
-}
-
-/*
- * Given a 56 bit wrapper in XDMCP format, create a 56
- * bit wrapper in 7-bits + odd parity format
- */
-
-static int
-OddParity (c)
- unsigned char c;
-{
- c = c ^ (c >> 4);
- c = c ^ (c >> 2);
- c = c ^ (c >> 1);
- return ~c & 0x1;
-}
-
-/*
- * Spread the 56 bit wrapper among 8 bytes, using the upper 7 bits
- * of each byte, and storing an odd parity bit in the low bit
- */
-
-void
-_XdmcpWrapperToOddParity (in, out)
- unsigned char *in, *out;
-{
- int ashift, bshift;
- int i;
- unsigned char c;
-
- ashift = 7;
- bshift = 1;
- for (i = 0; i < 7; i++)
- {
- c = ((in[i] << ashift) | (in[i+1] >> bshift)) & 0x7f;
- out[i] = (c << 1) | OddParity (c);
- ashift--;
- bshift++;
- }
- c = in[i];
- out[i] = (c << 1) | OddParity(c);
-}
-
-#endif