1 files changed, 102 insertions, 0 deletions
diff --git a/libXdmcp/Key.c b/libXdmcp/Key.c
new file mode 100644
index 000000000..ab1cb33c6
--- /dev/null
+++ b/libXdmcp/Key.c
@@ -0,0 +1,102 @@
+/*
+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>
+
+static void
+getbits (long data, unsigned char *dst)
+{
+    dst[0] = (data      ) & 0xff;
+    dst[1] = (data >>  8) & 0xff;
+    dst[2] = (data >> 16) & 0xff;
+    dst[3] = (data >> 24) & 0xff;
+}
+
+#define Time_t time_t
+
+#include <stdlib.h>
+
+#if defined(HAVE_LRAND48) && defined(HAVE_SRAND48)
+#define srandom srand48
+#define random lrand48
+#endif
+#ifdef WIN32
+#include <process.h>
+#define srandom srand
+#define random rand
+#define getpid(x) _getpid(x)
+#endif
+
+void
+XdmcpGenerateKey (XdmAuthKeyPtr key)
+{
+    long    lowbits, highbits;
+
+    srandom ((int)getpid() ^ time((Time_t *)0));
+    lowbits = random ();
+    highbits = random ();
+    getbits (lowbits, key->data);
+    getbits (highbits, key->data + 4);
+}
+
+int
+XdmcpCompareKeys (const XdmAuthKeyPtr a, const XdmAuthKeyPtr b)
+{
+    int	i;
+
+    for (i = 0; i < 8; i++)
+	if (a->data[i] != b->data[i])
+	    return FALSE;
+    return TRUE;
+}
+
+void
+XdmcpIncrementKey (XdmAuthKeyPtr key)
+{
+    int	i;
+
+    i = 7;
+    while (++key->data[i] == 0)
+	if (--i < 0)
+	    break;
+}
+
+void
+XdmcpDecrementKey (XdmAuthKeyPtr key)
+{
+    int	i;
+
+    i = 7;
+    while (key->data[i]-- == 0)
+	if (--i < 0)
+	    break;
+}