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+#ifndef D3DES_H
+#define D3DES_H
+
+/*
+ * This is D3DES (V5.09) by Richard Outerbridge with the double and
+ * triple-length support removed for use in VNC.
+ *
+ * These changes are:
+ * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* d3des.h -
+ *
+ * Headers and defines for d3des.c
+ * Graven Imagery, 1992.
+ *
+ * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge
+ * (GEnie : OUTER; CIS : [71755,204])
+ */
+
+#define EN0 0 /* MODE == encrypt */
+#define DE1 1 /* MODE == decrypt */
+
+extern void deskey(unsigned char *, int);
+/* hexkey[8] MODE
+ * Sets the internal key register according to the hexadecimal
+ * key contained in the 8 bytes of hexkey, according to the DES,
+ * for encryption or decryption according to MODE.
+ */
+
+extern void usekey(unsigned long *);
+/* cookedkey[32]
+ * Loads the internal key register with the data in cookedkey.
+ */
+
+extern void cpkey(unsigned long *);
+/* cookedkey[32]
+ * Copies the contents of the internal key register into the storage
+ * located at &cookedkey[0].
+ */
+
+extern void des(unsigned char *, unsigned char *);
+/* from[8] to[8]
+ * Encrypts/Decrypts (according to the key currently loaded in the
+ * internal key register) one block of eight bytes at address 'from'
+ * into the block at address 'to'. They can be the same.
+ */
+
+/* d3des.h V5.09 rwo 9208.04 15:06 Graven Imagery
+ ********************************************************************/
+
+#endif