91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
|
/*
|
||
|
|
Copyright 1989, 1998 The Open Group
|
||
|
|
|
||
|
|
Permission to use, copy, modify, distribute, and sell this software and its
|
||
|
|
documentation for any purpose is hereby granted without fee, provided that
|
||
|
|
the above copyright notice appear in all copies and that both that
|
||
|
|
copyright notice and this permission notice appear in supporting
|
||
|
|
documentation.
|
||
|
|
|
||
|
|
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
|
||
|
|
OPEN GROUP 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 Open Group 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 Open Group.
|
||
|
|
* *
|
||
|
|
* Author: Keith Packard, MIT X Consortium
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
#include <config.h>
|
||
|
|
#endif
|
||
|
|
#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.
|
||
|
|
*
|
||
|
|
* The interface for this routine is quite simple. All three
|
||
|
|
* arguments are arrays of 8 unsigned characters, the first two
|
||
|
|
* are 64 bits of useful data, the last is 56 bits of useful
|
||
|
|
* data packed into 8 bytes, using the low 7 bits of each
|
||
|
|
* byte, filling the high bit with odd parity.
|
||
|
|
*
|
||
|
|
* Examine the XDMCP specification for the correct algorithm
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "Wrap.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
XdmcpUnwrap (
|
||
|
|
unsigned char *input,
|
||
|
|
unsigned char *wrapper,
|
||
|
|
unsigned char *output,
|
||
|
|
int bytes)
|
||
|
|
{
|
||
|
|
int i, j, k;
|
||
|
|
unsigned char tmp[8];
|
||
|
|
unsigned char blocks[2][8];
|
||
|
|
unsigned char expand_wrapper[8];
|
||
|
|
auth_wrapper_schedule schedule;
|
||
|
|
|
||
|
|
_XdmcpWrapperToOddParity (wrapper, expand_wrapper);
|
||
|
|
_XdmcpAuthSetup (expand_wrapper, schedule);
|
||
|
|
|
||
|
|
k = 0;
|
||
|
|
for (j = 0; j < bytes; j += 8)
|
||
|
|
{
|
||
|
|
if (bytes - j < 8)
|
||
|
|
return; /* bad input length */
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
blocks[k][i] = input[j + i];
|
||
|
|
_XdmcpAuthDoIt ((unsigned char *) (input + j), (unsigned char *) tmp, schedule, 0);
|
||
|
|
/* block chaining */
|
||
|
|
k = (k == 0) ? 1 : 0;
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
{
|
||
|
|
if (j == 0)
|
||
|
|
output[j + i] = tmp[i];
|
||
|
|
else
|
||
|
|
output[j + i] = tmp[i] ^ blocks[k][i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* HASXDMAUTH */
|