Subversion Repositories hight

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

////                                                              ////

////  Subkey generator of key scheduler for HIGHT Crypto Core     ////

////                                                              ////

////  This file is part of the HIGHT Crypto Core project          ////

////  http://github.com/OpenSoCPlus/hight_crypto_core             ////

////  http://www.opencores.org/project,hight                      ////

////                                                              ////

////  Description                                                 ////

////  __description__                                             ////

////                                                              ////

////  Author(s):                                                  ////

////      - JoonSoo Ha, json.ha@gmail.com                         ////

////      - Younjoo Kim, younjookim.kr@gmail.com                  ////

////                                                              ////

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

////                                                              ////

//// Copyright (C) 2015 Authors, OpenSoCPlus 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 SKG(

        i_op       ,

        i_rnd_idx  ,

        i_mk       ,

        o_sk3x     ,

        o_sk2x     ,

        o_sk1x     ,

        o_sk0x

);

//=====================================

//

//          PARAMETERS 

//

//=====================================

//=====================================

//

//          I/O PORTS 

//

//=====================================

input        i_op       ;

input[4:0]   i_rnd_idx  ;

input[127:0] i_mk       ;

output[7:0]  o_sk3x     ;

output[7:0]  o_sk2x     ;

output[7:0]  o_sk1x     ;

output[7:0]  o_sk0x     ;

//=====================================

//

//          REGISTERS

//

//=====================================

//=====================================

//

//          WIRES

//

//=====================================

// w_mk15 ~ w_mk0

wire[7:0]   w_mk15 = i_mk[127:120];

wire[7:0]   w_mk14 = i_mk[119:112];

wire[7:0]   w_mk13 = i_mk[111:104];

wire[7:0]   w_mk12 = i_mk[103: 96];

wire[7:0]   w_mk11 = i_mk[ 95: 88];

wire[7:0]   w_mk10 = i_mk[ 87: 80];

wire[7:0]   w_mk9  = i_mk[ 79: 72];

wire[7:0]   w_mk8  = i_mk[ 71: 64];

wire[7:0]   w_mk7  = i_mk[ 63: 56];

wire[7:0]   w_mk6  = i_mk[ 55: 48];

wire[7:0]   w_mk5  = i_mk[ 47: 40];

wire[7:0]   w_mk4  = i_mk[ 39: 32];

wire[7:0]   w_mk3  = i_mk[ 31: 24];

wire[7:0]   w_mk2  = i_mk[ 23: 16];

wire[7:0]   w_mk1  = i_mk[ 15:  8];

wire[7:0]   w_mk0  = i_mk[  7:  0];

// w_base

wire[4:0]   w_base;

// w_d3x ~ w_d0x

reg[6:0]    w_d3x;

reg[6:0]    w_d2x;

reg[6:0]    w_d1x;

reg[6:0]    w_d0x;

// w_mk3x ~ w_mk0x

reg[7:0]    w_mk3x;

reg[7:0]    w_mk2x;

reg[7:0]    w_mk1x;

reg[7:0]    w_mk0x;

// w_sk3x_tmp ~ w_sk0x_tmp

wire[7:0]   w_sk3x_tmp;

wire[7:0]   w_sk2x_tmp;

wire[7:0]   w_sk1x_tmp;

wire[7:0]   w_sk0x_tmp;

//=====================================

//

//          MAIN

//

//=====================================

// w_base

assign      w_base = (~i_op) ? i_rnd_idx         :

                               5'd31 - i_rnd_idx ;

// w_d3x

always @(w_base)

        case(w_base)

        5'd00 : w_d3x <= 7'h1b; // idx : 3

        5'd01 : w_d3x <= 7'h41; // idx : 7

        5'd02 : w_d3x <= 7'h4c; // idx : 11

        5'd03 : w_d3x <= 7'h2c; // idx : 15

        5'd04 : w_d3x <= 7'h4a; // idx : 19

        5'd05 : w_d3x <= 7'h1c; // idx : 23

        5'd06 : w_d3x <= 7'h79; // idx : 27

        5'd07 : w_d3x <= 7'h37; // idx : 31

        5'd08 : w_d3x <= 7'h0b; // idx : 35

        5'd09 : w_d3x <= 7'h50; // idx : 39

        5'd10 : w_d3x <= 7'h55; // idx : 43

        5'd11 : w_d3x <= 7'h7d; // idx : 47

        5'd12 : w_d3x <= 7'h17; // idx : 51

        5'd13 : w_d3x <= 7'h29; // idx : 55

        5'd14 : w_d3x <= 7'h62; // idx : 59

        5'd15 : w_d3x <= 7'h76; // idx : 63

        5'd16 : w_d3x <= 7'h47; // idx : 67

        5'd17 : w_d3x <= 7'h7c; // idx : 71

        5'd18 : w_d3x <= 7'h1f; // idx : 75

        5'd19 : w_d3x <= 7'h61; // idx : 79

        5'd20 : w_d3x <= 7'h6e; // idx : 83

        5'd21 : w_d3x <= 7'h1e; // idx : 87

        5'd22 : w_d3x <= 7'h69; // idx : 91

        5'd23 : w_d3x <= 7'h26; // idx : 95

        5'd24 : w_d3x <= 7'h12; // idx : 99

        5'd25 : w_d3x <= 7'h01; // idx : 103

        5'd26 : w_d3x <= 7'h08; // idx : 107

        5'd27 : w_d3x <= 7'h48; // idx : 111

        5'd28 : w_d3x <= 7'h0c; // idx : 115

        5'd29 : w_d3x <= 7'h68; // idx : 119

        5'd30 : w_d3x <= 7'h2e; // idx : 123

        5'd31 : w_d3x <= 7'h5a; // idx : 127

        endcase

// w_d2x

always @(w_base)

        case(w_base)

        5'd00 : w_d2x <= 7'h36; // idx : 2 

        5'd01 : w_d2x <= 7'h03; // idx : 6

        5'd02 : w_d2x <= 7'h18; // idx : 10

        5'd03 : w_d2x <= 7'h59; // idx : 14

        5'd04 : w_d2x <= 7'h15; // idx : 18

        5'd05 : w_d2x <= 7'h39; // idx : 22

        5'd06 : w_d2x <= 7'h73; // idx : 26

        5'd07 : w_d2x <= 7'h6f; // idx : 30

        5'd08 : w_d2x <= 7'h16; // idx : 34

        5'd09 : w_d2x <= 7'h21; // idx : 38

        5'd10 : w_d2x <= 7'h2a; // idx : 42

        5'd11 : w_d2x <= 7'h7a; // idx : 46

        5'd12 : w_d2x <= 7'h2f; // idx : 50

        5'd13 : w_d2x <= 7'h52; // idx : 54

        5'd14 : w_d2x <= 7'h45; // idx : 58

        5'd15 : w_d2x <= 7'h6c; // idx : 62

        5'd16 : w_d2x <= 7'h0e; // idx : 66

        5'd17 : w_d2x <= 7'h78; // idx : 70

        5'd18 : w_d2x <= 7'h3f; // idx : 74

        5'd19 : w_d2x <= 7'h43; // idx : 78

        5'd20 : w_d2x <= 7'h5c; // idx : 82

        5'd21 : w_d2x <= 7'h3d; // idx : 86

        5'd22 : w_d2x <= 7'h53; // idx : 90

        5'd23 : w_d2x <= 7'h4d; // idx : 94

        5'd24 : w_d2x <= 7'h24; // idx : 98

        5'd25 : w_d2x <= 7'h02; // idx : 102

        5'd26 : w_d2x <= 7'h10; // idx : 106

        5'd27 : w_d2x <= 7'h11; // idx : 110

        5'd28 : w_d2x <= 7'h19; // idx : 114

        5'd29 : w_d2x <= 7'h51; // idx : 118

        5'd30 : w_d2x <= 7'h5d; // idx : 122

        5'd31 : w_d2x <= 7'h35; // idx : 126

        endcase

// w_d1x

always @(w_base)

        case(w_base)

        5'd00 : w_d1x <= 7'h6d; // idx : 1

        5'd01 : w_d1x <= 7'h06; // idx : 5

        5'd02 : w_d1x <= 7'h30; // idx : 9

        5'd03 : w_d1x <= 7'h33; // idx : 13

        5'd04 : w_d1x <= 7'h2b; // idx : 17

        5'd05 : w_d1x <= 7'h72; // idx : 21

        5'd06 : w_d1x <= 7'h67; // idx : 25

        5'd07 : w_d1x <= 7'h5e; // idx : 29

        5'd08 : w_d1x <= 7'h2d; // idx : 33

        5'd09 : w_d1x <= 7'h42; // idx : 37

        5'd10 : w_d1x <= 7'h54; // idx : 41

        5'd11 : w_d1x <= 7'h75; // idx : 45

        5'd12 : w_d1x <= 7'h5f; // idx : 49

        5'd13 : w_d1x <= 7'h25; // idx : 53

        5'd14 : w_d1x <= 7'h0a; // idx : 57

        5'd15 : w_d1x <= 7'h58; // idx : 61

        5'd16 : w_d1x <= 7'h1d; // idx : 65

        5'd17 : w_d1x <= 7'h71; // idx : 69

        5'd18 : w_d1x <= 7'h7f; // idx : 73

        5'd19 : w_d1x <= 7'h07; // idx : 77

        5'd20 : w_d1x <= 7'h38; // idx : 81

        5'd21 : w_d1x <= 7'h7b; // idx : 85

        5'd22 : w_d1x <= 7'h27; // idx : 89

        5'd23 : w_d1x <= 7'h1a; // idx : 93

        5'd24 : w_d1x <= 7'h49; // idx : 97

        5'd25 : w_d1x <= 7'h04; // idx : 101

        5'd26 : w_d1x <= 7'h20; // idx : 105

        5'd27 : w_d1x <= 7'h22; // idx : 109

        5'd28 : w_d1x <= 7'h32; // idx : 113

        5'd29 : w_d1x <= 7'h23; // idx : 117

        5'd30 : w_d1x <= 7'h3a; // idx : 121

        5'd31 : w_d1x <= 7'h6b; // idx : 125

        endcase

// w_d0x

always @(w_base)

        case(w_base)

        5'd00 : w_d0x <= 7'h5a; // idx : 0

        5'd01 : w_d0x <= 7'h0d; // idx : 4 

        5'd02 : w_d0x <= 7'h60; // idx : 8

        5'd03 : w_d0x <= 7'h66; // idx : 12 

        5'd04 : w_d0x <= 7'h56; // idx : 16

        5'd05 : w_d0x <= 7'h65; // idx : 20

        5'd06 : w_d0x <= 7'h4e; // idx : 24

        5'd07 : w_d0x <= 7'h3c; // idx : 28

        5'd08 : w_d0x <= 7'h5b; // idx : 32

        5'd09 : w_d0x <= 7'h05; // idx : 36

        5'd10 : w_d0x <= 7'h28; // idx : 40

        5'd11 : w_d0x <= 7'h6a; // idx : 44

        5'd12 : w_d0x <= 7'h3e; // idx : 48

        5'd13 : w_d0x <= 7'h4b; // idx : 52

        5'd14 : w_d0x <= 7'h14; // idx : 56

        5'd15 : w_d0x <= 7'h31; // idx : 60

        5'd16 : w_d0x <= 7'h3b; // idx : 64

        5'd17 : w_d0x <= 7'h63; // idx : 68

        5'd18 : w_d0x <= 7'h7e; // idx : 72

        5'd19 : w_d0x <= 7'h0f; // idx : 76

        5'd20 : w_d0x <= 7'h70; // idx : 80

        5'd21 : w_d0x <= 7'h77; // idx : 84

        5'd22 : w_d0x <= 7'h4f; // idx : 88

        5'd23 : w_d0x <= 7'h34; // idx : 92

        5'd24 : w_d0x <= 7'h13; // idx : 96

        5'd25 : w_d0x <= 7'h09; // idx : 100

        5'd26 : w_d0x <= 7'h40; // idx : 104

        5'd27 : w_d0x <= 7'h44; // idx : 108

        5'd28 : w_d0x <= 7'h64; // idx : 112

        5'd29 : w_d0x <= 7'h46; // idx : 116

        5'd30 : w_d0x <= 7'h74; // idx : 120

        5'd31 : w_d0x <= 7'h57; // idx : 124

        endcase

// w_mk3x

always @(*)

        case(w_base)

        5'd00 : w_mk3x <= w_mk3 ; // idx : 3

        5'd01 : w_mk3x <= w_mk7 ; // idx : 7    

        5'd02 : w_mk3x <= w_mk11; // idx : 11

        5'd03 : w_mk3x <= w_mk15; // idx : 15

        5'd04 : w_mk3x <= w_mk2 ; // idx : 19

        5'd05 : w_mk3x <= w_mk6 ; // idx : 23

        5'd06 : w_mk3x <= w_mk10; // idx : 27

        5'd07 : w_mk3x <= w_mk14; // idx : 31

        5'd08 : w_mk3x <= w_mk1 ; // idx : 35

        5'd09 : w_mk3x <= w_mk5 ; // idx : 39

        5'd10 : w_mk3x <= w_mk9 ; // idx : 43

        5'd11 : w_mk3x <= w_mk13; // idx : 47

        5'd12 : w_mk3x <= w_mk0 ; // idx : 51

        5'd13 : w_mk3x <= w_mk4 ; // idx : 55

        5'd14 : w_mk3x <= w_mk8 ; // idx : 59

        5'd15 : w_mk3x <= w_mk12; // idx : 63

        5'd16 : w_mk3x <= w_mk7 ; // idx : 67

        5'd17 : w_mk3x <= w_mk3 ; // idx : 71

        5'd18 : w_mk3x <= w_mk15; // idx : 75

        5'd19 : w_mk3x <= w_mk11; // idx : 79

        5'd20 : w_mk3x <= w_mk6 ; // idx : 83

        5'd21 : w_mk3x <= w_mk2 ; // idx : 87

        5'd22 : w_mk3x <= w_mk14; // idx : 91

        5'd23 : w_mk3x <= w_mk10; // idx : 95

        5'd24 : w_mk3x <= w_mk5 ; // idx : 99

        5'd25 : w_mk3x <= w_mk1 ; // idx : 103

        5'd26 : w_mk3x <= w_mk13; // idx : 107

        5'd27 : w_mk3x <= w_mk9 ; // idx : 111

        5'd28 : w_mk3x <= w_mk4 ; // idx : 115

        5'd29 : w_mk3x <= w_mk0 ; // idx : 119

        5'd30 : w_mk3x <= w_mk12; // idx : 123

        5'd31 : w_mk3x <= w_mk8 ; // idx : 127

        endcase

// w_mk2x

always @(*)

        case(w_base)

        5'd00 : w_mk2x <= w_mk2 ; // idx : 2 

        5'd01 : w_mk2x <= w_mk6 ; // idx : 6    

        5'd02 : w_mk2x <= w_mk10; // idx : 10

        5'd03 : w_mk2x <= w_mk14; // idx : 14

        5'd04 : w_mk2x <= w_mk1 ; // idx : 18

        5'd05 : w_mk2x <= w_mk5 ; // idx : 22

        5'd06 : w_mk2x <= w_mk9 ; // idx : 26

        5'd07 : w_mk2x <= w_mk13; // idx : 30

        5'd08 : w_mk2x <= w_mk0 ; // idx : 34

        5'd09 : w_mk2x <= w_mk4 ; // idx : 38

        5'd10 : w_mk2x <= w_mk8 ; // idx : 42

        5'd11 : w_mk2x <= w_mk12; // idx : 46

        5'd12 : w_mk2x <= w_mk7 ; // idx : 50

        5'd13 : w_mk2x <= w_mk3 ; // idx : 54

        5'd14 : w_mk2x <= w_mk15; // idx : 58

        5'd15 : w_mk2x <= w_mk11; // idx : 62

        5'd16 : w_mk2x <= w_mk6 ; // idx : 66

        5'd17 : w_mk2x <= w_mk2 ; // idx : 70

        5'd18 : w_mk2x <= w_mk14; // idx : 74

        5'd19 : w_mk2x <= w_mk10; // idx : 78

        5'd20 : w_mk2x <= w_mk5 ; // idx : 82

        5'd21 : w_mk2x <= w_mk1 ; // idx : 86

        5'd22 : w_mk2x <= w_mk13; // idx : 90

        5'd23 : w_mk2x <= w_mk9 ; // idx : 94

        5'd24 : w_mk2x <= w_mk4 ; // idx : 98

        5'd25 : w_mk2x <= w_mk0 ; // idx : 102

        5'd26 : w_mk2x <= w_mk12; // idx : 106

        5'd27 : w_mk2x <= w_mk8 ; // idx : 110

        5'd28 : w_mk2x <= w_mk3 ; // idx : 114

        5'd29 : w_mk2x <= w_mk7 ; // idx : 118

        5'd30 : w_mk2x <= w_mk11; // idx : 122

        5'd31 : w_mk2x <= w_mk15; // idx : 126

        endcase

// w_mk1x

always @(*)

        case(w_base)

        5'd00 : w_mk1x <= w_mk1 ; // idx : 1

        5'd01 : w_mk1x <= w_mk5 ; // idx : 5    

        5'd02 : w_mk1x <= w_mk9 ; // idx : 9

        5'd03 : w_mk1x <= w_mk13; // idx : 13

        5'd04 : w_mk1x <= w_mk0 ; // idx : 17

        5'd05 : w_mk1x <= w_mk4 ; // idx : 21

        5'd06 : w_mk1x <= w_mk8 ; // idx : 25

        5'd07 : w_mk1x <= w_mk12; // idx : 29

        5'd08 : w_mk1x <= w_mk7 ; // idx : 33

        5'd09 : w_mk1x <= w_mk3 ; // idx : 37

        5'd10 : w_mk1x <= w_mk15; // idx : 41

        5'd11 : w_mk1x <= w_mk11; // idx : 45

        5'd12 : w_mk1x <= w_mk6 ; // idx : 49

        5'd13 : w_mk1x <= w_mk2 ; // idx : 53

        5'd14 : w_mk1x <= w_mk14; // idx : 57

        5'd15 : w_mk1x <= w_mk10; // idx : 61

        5'd16 : w_mk1x <= w_mk5 ; // idx : 65

        5'd17 : w_mk1x <= w_mk1 ; // idx : 69

        5'd18 : w_mk1x <= w_mk13; // idx : 73

        5'd19 : w_mk1x <= w_mk9 ; // idx : 77

        5'd20 : w_mk1x <= w_mk4 ; // idx : 81

        5'd21 : w_mk1x <= w_mk0 ; // idx : 85

        5'd22 : w_mk1x <= w_mk12; // idx : 89

        5'd23 : w_mk1x <= w_mk8 ; // idx : 93

        5'd24 : w_mk1x <= w_mk3 ; // idx : 97

        5'd25 : w_mk1x <= w_mk7 ; // idx : 101

        5'd26 : w_mk1x <= w_mk11; // idx : 105

        5'd27 : w_mk1x <= w_mk15; // idx : 109

        5'd28 : w_mk1x <= w_mk2 ; // idx : 113

        5'd29 : w_mk1x <= w_mk6 ; // idx : 117

        5'd30 : w_mk1x <= w_mk10; // idx : 121

        5'd31 : w_mk1x <= w_mk14; // idx : 125

        endcase

// w_mk0x

always @(*)

        case(w_base)

        5'd00 : w_mk0x <= w_mk0 ; // idx : 0

        5'd01 : w_mk0x <= w_mk4 ; // idx : 4    

        5'd02 : w_mk0x <= w_mk8 ; // idx : 8

        5'd03 : w_mk0x <= w_mk12; // idx : 12 

        5'd04 : w_mk0x <= w_mk7 ; // idx : 16

        5'd05 : w_mk0x <= w_mk3 ; // idx : 20

        5'd06 : w_mk0x <= w_mk15; // idx : 24

        5'd07 : w_mk0x <= w_mk11; // idx : 28

        5'd08 : w_mk0x <= w_mk6 ; // idx : 32

        5'd09 : w_mk0x <= w_mk2 ; // idx : 36

        5'd10 : w_mk0x <= w_mk14; // idx : 40

        5'd11 : w_mk0x <= w_mk10; // idx : 44

        5'd12 : w_mk0x <= w_mk5 ; // idx : 48

        5'd13 : w_mk0x <= w_mk1 ; // idx : 52

        5'd14 : w_mk0x <= w_mk13; // idx : 56

        5'd15 : w_mk0x <= w_mk9 ; // idx : 60

        5'd16 : w_mk0x <= w_mk4 ; // idx : 64

        5'd17 : w_mk0x <= w_mk0 ; // idx : 68

        5'd18 : w_mk0x <= w_mk12; // idx : 72

        5'd19 : w_mk0x <= w_mk8 ; // idx : 76

        5'd20 : w_mk0x <= w_mk3 ; // idx : 80

        5'd21 : w_mk0x <= w_mk7 ; // idx : 84

        5'd22 : w_mk0x <= w_mk11; // idx : 88

        5'd23 : w_mk0x <= w_mk15; // idx : 92

        5'd24 : w_mk0x <= w_mk2 ; // idx : 96

        5'd25 : w_mk0x <= w_mk6 ; // idx : 100

        5'd26 : w_mk0x <= w_mk10; // idx : 104

        5'd27 : w_mk0x <= w_mk14; // idx : 108

        5'd28 : w_mk0x <= w_mk1 ; // idx : 112

        5'd29 : w_mk0x <= w_mk5 ; // idx : 116

        5'd30 : w_mk0x <= w_mk9 ; // idx : 120

        5'd31 : w_mk0x <= w_mk13; // idx : 124

        endcase

// w_sk3x_tmp

assign      w_sk3x_tmp = {1'b0,w_d3x} + w_mk3x;

// w_sk2x_tmp

assign      w_sk2x_tmp = {1'b0,w_d2x} + w_mk2x;

// w_sk1x_tmp

assign      w_sk1x_tmp = {1'b0,w_d1x} + w_mk1x;

// w_sk0x_tmp

assign      w_sk0x_tmp = {1'b0,w_d0x} + w_mk0x;

// o_sk3x

assign      o_sk3x     = (~i_op) ? w_sk3x_tmp : // i_op == 0

                                   w_sk0x_tmp ; // i_op == 1

// o_sk2x

assign      o_sk2x     = (~i_op) ? w_sk2x_tmp : // i_op == 0  

                                   w_sk1x_tmp ; // i_op == 1

// o_sk1x

assign      o_sk1x     = (~i_op) ? w_sk1x_tmp : // i_op == 0  

                                   w_sk2x_tmp ; // i_op == 1

// o_sk0x

assign      o_sk0x     = (~i_op) ? w_sk0x_tmp : // i_op == 0  

                                   w_sk3x_tmp ; // i_op == 1

endmodule