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Diffstat (limited to 'nx-X11/lib/Xdmcp/Unwrap.c')
| -rw-r--r-- | nx-X11/lib/Xdmcp/Unwrap.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/nx-X11/lib/Xdmcp/Unwrap.c b/nx-X11/lib/Xdmcp/Unwrap.c new file mode 100644 index 000000000..0d60c2bed --- /dev/null +++ b/nx-X11/lib/Xdmcp/Unwrap.c @@ -0,0 +1,95 @@ +/* + * $Xorg: Unwrap.c,v 1.4 2001/02/09 02:03:48 xorgcvs Exp $ + * + * +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 + */ + +/* $XFree86: xc/lib/Xdmcp/Unwrap.c,v 1.3 2001/01/17 19:42:44 dawes Exp $ */ + +#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 */ |