raymondrc / FPGA_SM4

FPGA implementation of Chinese SM4 encryption algorithm.

FPGA implementation of Chinese SM4 encryption algorithm.

Introduction

This project is an implementation of Chinese SM4 (also known as sms4) encryption algorithm.

Features

• Pipeline architecture,
• 128-bit datapath,
• following algorithms are supported:
  • key expansion
  • Encryption
  • Decryption

Architecture

Interface

Interface	direction	width	description
clk	in	1-bit	clock signal
resetn	in	1-bit	reset signal, 0 reset
sm4_enable_in	in	1-bit	enable sm4 core to work
encdec_sel_in	in	1-bit	select of encryption or decryption
enable_key_exp_in	in	1-bit	enable key expansion for sm4
user_key_valid_in	in	1-bit	valid signal of user key
user_key_in	in	128-bit	128-bit user key
encdec_enable_in	in	1-bit	enable encryption to work
valid_in	in	1-bit	valid signal of plain text
data_in	in	128-bit	plain text, 128-bit, 16 Bytes
key_exp_ready_out	out	1-bit	ready signal of key expansion
ready_out	out	1-bit	ready signal of encryption result
result_out	out	128-bit	encryption result

Timing

Timing diagram is edited by WaveDrom

{signal: [
  {name: 'clk', wave: 'p.....................|.'},
  {name: 'resetn', wave: '01....................|.'},
  {name: 'sm4_enable_in', wave: '0.1...................|.'},
  {name: 'encdec_sel_in', wave: '0.1...................|.'},
  {name: 'enable_key_exp_in', wave: '0..1..................|.'},
  {name: 'user_key_valid_in', wave: '0....10...............|.'},
  {name: 'user_key_in', wave: 'x....3x|..............|.',data:["Key"]},
  {name: 'key_exp_ready_out', wave: '0......|1.............|.'},
  {name: 'valid_in', wave: '0........|101010......|.'},
  {name: 'data_in', wave: 'x........|4x4x4x......|.', data:["Plain 1", "Plain 2", "Plain 3"]},
  {name: 'ready_out', wave: '0........|.....|101010|.'},
  {name: 'data_in', wave: 'x........|.....|5x5x5x|.', data:["Cpiher 1", "Cpiher 2","Cpiher 3",]},   
],
   config : { "hscale" : 2 }
}

FPGA resource utilization

FPGA Power Report

FPGA Timing Report

The period of clock is set to 2ns.