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+/*********************************************************************
+* Filename: arcfour.h
+* Author: Brad Conte (brad AT bradconte.com)
+* Copyright:
+* Disclaimer: This code is presented "as is" without any guarantees.
+* Details: Defines the API for the corresponding ARCFOUR implementation.
+*********************************************************************/
+
+#ifndef ARCFOUR_H
+#define ARCFOUR_H
+
+/*************************** HEADER FILES ***************************/
+#include <stddef.h>
+
+/**************************** DATA TYPES ****************************/
+typedef unsigned char BYTE; // 8-bit byte
+
+/*********************** FUNCTION DECLARATIONS **********************/
+// Input: state - the state used to generate the keystream
+// key - Key to use to initialize the state
+// len - length of key in bytes (valid lenth is 1 to 256)
+void arcfour_key_setup(BYTE state[], const BYTE key[], int len);
+
+// Pseudo-Random Generator Algorithm
+// Input: state - the state used to generate the keystream
+// out - Must be allocated to be of at least "len" length
+// len - number of bytes to generate
+void arcfour_generate_stream(BYTE state[], BYTE out[], size_t len);
+
+#endif // ARCFOUR_H