/*-----------------------------------------------
 * * f8.h
 * *---------------------------------------------
 */

/* The code has been referred from
 * 1. https://www.gsma.com/aboutus/wp-content/uploads/2014/12/uea2uia2d1v21.pdf
 * 2. https://www.gsma.com/aboutus/wp-content/uploads/2014/12/snow3gspec.pdf
 */


#ifndef F8_H_
#define F8_H_
#include "snow_3g.h"


/* f8.
 * Input key: 128 bit Confidentiality Key.
 * Input count:32-bit Count, Frame dependent input.
 * Input bearer: 5-bit Bearer identity (in the LSB side).
 * Input dir:1 bit, direction of transmission.
 * Input data: length number of bits, input bit stream.
 * Input length: 32 bit Length, i.e., the number of bits to be encrypted or
 * decrypted.
 * Output data: Output bit stream. Assumes data is suitably memory
 * allocated.
 * Encrypts/decrypts blocks of data between 1 and 2^32 bits in length as
 * defined in Section 3 of
 * https://www.gsma.com/aboutus/wp-content/uploads/2014/12/snow3gspec.pdf
 * specs document
*/


void f8( u8 *key, u32 count, u32 bearer, u32 dir, u8 *data, u32 length );


#endif