Subversion Repositories apbtoaes128

//////////////////////////////////////////////////////////////////

////

////

////    AES CORE BLOCK

////

////

////

//// This file is part of the APB to I2C project

////

//// http://www.opencores.org/cores/apbi2c/

////

////

////

//// Description

////

//// Implementation of APB IP core according to

////

//// aes128_spec IP core specification document.

////

////

////

//// To Do: Things are right here but always all block can suffer changes

////

////

////

////

////

//// Author(s): - Felipe Fernandes Da Costa, fefe2560@gmail.com

////              Julio Cesar 

////

///////////////////////////////////////////////////////////////// 

////

////

//// Copyright (C) 2009 Authors and OPENCORES.ORG

////

////

////

//// This source file may be used and distributed without

////

//// restriction provided that this copyright statement is not

////

//// removed from the file and that any derivative work contains

//// the original copyright notice and the associated disclaimer.

////

////

//// This source file is free software; you can redistribute it

////

//// and/or modify it under the terms of the GNU Lesser General

////

//// Public License as published by the Free Software Foundation;

//// either version 2.1 of the License, or (at your option) any

////

//// later version.

////

////

////

//// This source 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. See the GNU Lesser General Public License for more

//// details.

////

////

////

//// You should have received a copy of the GNU Lesser General

////

//// Public License along with this source; if not, download it

////

//// from http://www.opencores.org/lgpl.shtml

////

////

///////////////////////////////////////////////////////////////////

module aes_core

(

        //OUTPUTS

        output [31:0] col_out,

        output [31:0] key_out,

        output [31:0] iv_out,

        output end_aes,

        //INPUTS

        input  [31:0] bus_in,

        input  [ 3:0] iv_en,

        input  [ 3:0] iv_sel_rd,

        input  [ 3:0] key_en,

        input  [ 1:0] key_sel_rd,

        input  [ 1:0] data_type,

        input  [ 1:0] addr,

        input  [ 1:0] op_mode,

        input  [ 1:0] aes_mode,

        input start,

        input disable_core,

        input write_en,

        input read_en,

        input first_block,

        input rst_n,

        input clk

);

wire [ 1:0] rk_sel;

wire [ 1:0] key_out_sel;

wire [ 3:0] round;

wire [ 2:0] sbox_sel;

wire [ 3:0] col_en_host;

wire [ 3:0] iv_en_host;

wire [ 3:0] col_en_cnt_unit;

wire [ 3:0] key_en_host;

wire [ 3:0] key_en_cnt_unit;

wire [ 1:0] col_sel;

wire        key_sel;

wire bypass_rk;

wire bypass_key_en;

wire last_round;

wire iv_cnt_en;

wire iv_cnt_sel;

wire mode_ctr;

wire mode_cbc;

wire key_init;

wire key_gen;

wire [1:0] col_addr_host;

assign col_en_host = (4'b0001 << addr) & {4{write_en}};

assign col_addr_host = addr & {2{read_en}};

assign iv_en_host  = iv_en;

assign key_en_host = key_en;

datapath AES_CORE_DATAPATH

(

        .col_bus           ( col_out           ),

        .key_bus           ( key_out           ),

        .iv_bus            ( iv_out            ),

        .bus_in                              ( bus_in                              ),

        .end_aes           ( end_aes           ),

        .data_type         ( data_type                     ),

        .rk_sel                                    ( rk_sel                        ),

        .key_out_sel               ( key_out_sel                   ),

        .round                                     ( round                         ),

        .sbox_sel                                  ( sbox_sel                      ),

        .iv_en                                     ( iv_en_host                    ),

        .iv_sel_rd         ( iv_sel_rd         ),

        .col_en_host       ( col_en_host       ),

        .col_en_cnt_unit   ( col_en_cnt_unit   ),

        .key_host_en               ( key_en_host       ),

        .key_en                                    ( key_en_cnt_unit   ),

        .key_sel_rd        ( key_sel_rd        ),

        .col_sel_host              ( col_addr_host         ),

        .col_sel           ( col_sel           ),

        .key_sel                                   ( key_sel               ),

        .bypass_rk                         ( bypass_rk             ),

        .bypass_key_en     ( bypass_key_en         ),

        .first_block       ( first_block           ),

        .last_round        ( last_round        ),

        .iv_cnt_en         ( iv_cnt_en             ),

        .iv_cnt_sel                        ( iv_cnt_sel            ),

        .enc_dec                                   ( enc_dec               ),

        .mode_ctr                                  ( mode_ctr              ),

        .mode_cbc                                  ( mode_cbc              ),

        .key_init          ( key_init          ),

        .key_gen           ( key_gen           ),

        .key_derivation_en ( key_derivation_en ),

        .end_comp          ( end_comp          ),

        .rst_n                                     ( rst_n                 ),

        .clk                                               ( clk                           )

);

control_unit AES_CORE_CONTROL_UNIT

(

        .end_comp          ( end_comp          ),

        .sbox_sel          ( sbox_sel          ),

        .rk_sel            ( rk_sel            ),

        .key_out_sel       ( key_out_sel       ),

        .col_sel           ( col_sel           ),

        .key_en            ( key_en_cnt_unit   ),

        .col_en            ( col_en_cnt_unit   ),

        .round               ( round             ),

        .bypass_rk         ( bypass_rk         ),

        .bypass_key_en     ( bypass_key_en     ),

        .key_sel           ( key_sel           ),

        .last_round        ( last_round        ),

        .iv_cnt_en         ( iv_cnt_en         ),

        .iv_cnt_sel        ( iv_cnt_sel        ),

        .mode_ctr          ( mode_ctr          ),

        .mode_cbc          ( mode_cbc          ),

        .key_init          ( key_init          ),

        .encrypt_decrypt   ( enc_dec                               ),

        .key_gen           ( key_gen           ),

        .operation_mode    ( op_mode                               ),

        .aes_mode                                  ( aes_mode                              ),

        .start                                     ( start                                         ),

        .key_derivation_en ( key_derivation_en ),

        .disable_core      ( disable_core      ),

        .clk                                               ( clk                                                         ),

        .rst_n                                           ( rst_n                                                 )

);

endmodule