/* -*-c-*-
*
- * $Id: rc4.h,v 1.2 1999/12/10 23:27:46 mdw Exp $
+ * $Id: rc4.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
*
* The alleged RC4 stream cipher
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: rc4.h,v $
- * Revision 1.2 1999/12/10 23:27:46 mdw
- * Generic cipher and RNG interfaces.
- *
- * Revision 1.1 1999/09/03 08:41:12 mdw
- * Initial import.
- *
- */
-
/*----- Notes on RC4 ------------------------------------------------------*
*
* RC4 is a stream cipher desgigned by Ron Rivest. For a while RC4 was a
/*----- Functions provided ------------------------------------------------*/
+/* --- @rc4_addkey@ --- *
+ *
+ * Arguments: @rc4_ctx *ctx@ = pointer to context to key
+ * @const void *k@ = pointer to key data to use
+ * @size_t sz@ = size of the key data
+ *
+ * Returns: ---
+ *
+ * Use: Mixes key data with an RC4 context. The RC4 context is not
+ * reset before mixing. This may be used to mix new key
+ * material with an existing RC4 context.
+ */
+
+extern void rc4_addkey(rc4_ctx */*ctx*/, const void */*k*/, size_t /*sz*/);
+
/* --- @rc4_init@ --- *
*
* Arguments: @rc4_ctx *ctx@ = pointer to context to initialize
/*----- Generic cipher interface ------------------------------------------*/
+#define RC4_KEYSZ 16
+extern const octet rc4_keysz[];
+
extern const gccipher rc4;
/*----- Generic random number generator interface -------------------------*/