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/trunk/decipher.v File deleted \ No newline at end of file
trunk/decipher.v Property changes : Deleted: svn:executable ## -1 +0,0 ## -* \ No newline at end of property Index: trunk/encipher.v =================================================================== --- trunk/encipher.v (revision 3) +++ trunk/encipher.v (nonexistent) @@ -1,106 +0,0 @@ -module encipher(clock, reset, data_in1, data_in2, key_in, data_out1, data_out2, all_done); - -parameter s0 = 4'd0, s1 = 4'd1, s2 = 4'd2, s3 = 4'd3, s4 = 4'd4, s5 = 4'd5, s6 = 4'd6, s7 = 4'd7, s8 = 4'd8, s9 = 4'd9, s14 = 4'd14, s15 = 4'd15; - -input clock, reset; -input[31:0] data_in, data_in2; -input[127:0] key_in; -output[31:0] data_out1, data_out2; -output all_done; - -wire clock, reset; -wire[31:0] data_in1, data_in2; -wire[127:0] key_in; - -reg all_done, while_flag; -reg[1:0] selectslice; -reg[3:0] state; -reg[7:0] x; -reg[31:0] data_out1, data_out2, sum, workunit1, workunit2, delta; - -always @(posedge clock or posedge reset) -begin - if (reset) - state = s0; - else begin - case (state) - s0: state = s1; - s1: state = s2; - s2: state = s15; - s15: state = while_flag ? s3 : s14; - s3: state = s4; - s4: state = s5; - s5: state = s6; - s6: state = s7; - s7: state = s2; - s14: state = s8; - s8: state = s9; - s9: state = s9; - default: state = 4'bxxxx; - endcase - end -end - -always @(posedge clock or posedge reset) -begin - if (reset) begin - data_out1 = 32'h00000000; - data_out2 = 32'h00000000; - x = 8'b00000000; - sum = 32'h00000000; - while_flag = 1'b0; - workunit1 = 32'h00000000; - workunit2 = 32'h00000000; - selectslice = 1'b0; - all_done = 1'b0; - delta = 32'h00000000; - end - else begin - case (state) - s1: begin - workunit1 = data_in1; - workunit2 = data_in2; - sum = 32'h00000000; - delta = 32'h9E3779B9; - end - s2: if (x < 8'd32) while_flag = 1'b1; else while_flag = 1'b0; - s15: begin - //do nothing - end - s3: selectslice = (sum & 32'd3); - s4: case (selectslice) - 2'b00: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[127:96])); - 2'b01: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[95:64])); - 2'b10: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[63:32])); - 2'b11: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[31:0])); - default: workunit1 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz; - endcase - s5: sum = sum + delta; - s6: selectslice = (sum >> 32'd11 & 32'd3); - s7: begin - case (selectslice) - 2'b00: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[127:96])); - 2'b01: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[95:64])); - 2'b10: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[63:32])); - 2'b11: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[31:0])); - default: workunit2 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz; - endcase - x = x + 1'b1; - end - s14: begin - //do nothing - end - s8: begin - data_out1 = workunit1; - data_out2 = workunit2; - end - s9: all_done = 1'b1; - default: begin - data_out1 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz; - data_out2 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz; - end - endcase - end -end - -endmodule \ No newline at end of file
trunk/encipher.v Property changes : Deleted: svn:executable ## -1 +0,0 ## -* \ No newline at end of property Index: trunk/LICENSE =================================================================== --- trunk/LICENSE (nonexistent) +++ trunk/LICENSE (revision 4) @@ -0,0 +1,502 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. It also counts + as the successor of the GNU Library Public License, version 2, hence + the version number 2.1.] + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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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 library; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +Also add information on how to contact you by electronic and paper mail. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the library, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random Hacker. + + , 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! \ No newline at end of file Index: trunk/testbench.v =================================================================== --- trunk/testbench.v (revision 3) +++ trunk/testbench.v (revision 4) @@ -1,3 +1,47 @@ +////////////////////////////////////////////////////////////////////// +//// //// +//// XTEA IP Core //// +//// //// +//// This file is part of the xtea project //// +//// http://www.opencores.org/projects.cgi/web/xtea/overview //// +//// //// +//// Test-bench for the XTEA encryption algorithm. //// +//// //// +//// TODO: //// +//// * Update for new combined encipher/decipher module //// +//// * Tidy //// +//// * Add interconnections //// +//// //// +//// Author: David Johnson, dj@david-web.co.uk //// +//// //// +////////////////////////////////////////////////////////////////////// +//// //// +//// Copyright (C) 2006 David Johnson //// +//// //// +//// 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, write to the //// +//// Free Software Foundation, Inc., 51 Franklin Street, Fifth //// +//// Floor, Boston, MA 02110-1301 USA //// +//// //// +////////////////////////////////////////////////////////////////////// +// +// CVS Revision History +// +// $Log: not supported by cvs2svn $ +// + module cipher_testbench (clock, reset, all_done_encipher, all_done_decipher, data_out_encipher1, data_out_encipher2, data_out_decipher1, data_out_decipher2, data_in_encipher1, data_in_encipher2, data_in_decipher1, data_in_decipher2, key_out, result, reset_out); input clock, reset, all_done_encipher, all_done_decipher;
/trunk/xtea.v
0,0 → 1,192
//////////////////////////////////////////////////////////////////////
//// ////
//// XTEA IP Core ////
//// ////
//// This file is part of the xtea project ////
//// http://www.opencores.org/projects.cgi/web/xtea/overview ////
//// ////
//// An implementation of the XTEA encryption algorithm. ////
//// ////
//// TODO: ////
//// * Write a spec ////
//// * Wishbone compliance ////
//// ////
//// Author: David Johnson, dj@david-web.co.uk ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2006 David Johnson ////
//// ////
//// 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 ////
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//// 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, write to the ////
//// Free Software Foundation, Inc., 51 Franklin Street, Fifth ////
//// Floor, Boston, MA 02110-1301 USA ////
//// ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
//
 
module xtea(clock, reset, mode, data_in1, data_in2, key_in, data_out1, data_out2, all_done);
 
parameter s0 = 8'd0, s1 = 8'd1, s2 = 8'd2, s3 = 8'd3, s4 = 8'd4, s5 = 8'd5, s6 = 8'd6, s7 = 8'd7, s8 = 8'd8, s9 = 8'd9, s10 = 8'd10,
s11 = 8'd11, s12 = 8'd12, s13 = 8'd13, s14 = 8'd14, s15 = 8'd15, s16 = 8'd16, s17 = 8'd17;
 
input clock, reset, mode;
input[31:0] data_in1, data_in2;
input[127:0] key_in;
output[31:0] data_out1, data_out2;
output all_done;
 
wire clock, reset;
wire[31:0] data_in1, data_in2;
wire[127:0] key_in;
reg all_done, while_flag, modereg;
reg[1:0] selectslice;
reg[7:0] state;
reg[7:0] x;
reg[31:0] data_out1, data_out2, sum, workunit1, workunit2, delta;
 
always @(posedge clock or posedge reset)
begin
if (reset)
//reset state
state = s0;
else begin
case (state)
s0: state = s1;
s1: state = s2;
s2: state = s3;
s3: state = while_flag ? s4 : s14;
s4: state = modereg ? s10 : s5;
s5: state = s6;
s6: state = s7;
s7: state = s8;
s8: state = s9;
s9: state = s2;
s10: state = s11;
s11: state = s12;
s12: state = s13;
s13: state = s14;
s14: state = s2;
s15: state = s16;
s16: state = s17;
s17: state = s17;
default: state = 4'bxxxx;
endcase
end
end
 
always @(posedge clock or posedge reset)
begin
if (reset) begin
//reset all our outputs and registers
data_out1 = 32'h00000000;
data_out2 = 32'h00000000;
x = 8'b00000000;
sum = 32'h00000000;
while_flag = 1'b0;
workunit1 = 32'h00000000;
workunit2 = 32'h00000000;
selectslice = 1'b0;
all_done = 1'b0;
delta = 32'h00000000;
modereg = 1'b0;
end
else begin
case (state)
s1: begin
//store input values to registers in case they're not stable
workunit1 = data_in1;
workunit2 = data_in2;
delta = 32'h9E3779B9;
sum = 32'hc6ef3720;
modereg = mode;
end
s2: if (x < 8'd32) while_flag = 1'b1; else while_flag = 1'b0;
s3: begin
//This null state was necessary to fix a timing issue.
//s2 sets while_flag and previously the control path read it in the same state
//(but in the next clock cycle), however the reg wasn't set when we tried to
//read it, so this state was inserted to add a delay. This was when running @25MHz.
//FIXME: there's got to be a better solution to this...
end
s4: begin
//This state does nothing in the data path; it's used for an if statement in the
//control path.
end
/* States 5-9 used for decipher operations */
s5: selectslice = (sum >> 32'd11 & 32'd3);
s6: case (selectslice)
2'b00: workunit2 = workunit2 - (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[127:96]));
2'b01: workunit2 = workunit2 - (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[95:64]));
2'b10: workunit2 = workunit2 - (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[63:32]));
2'b11: workunit2 = workunit2 - (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[31:0]));
default: workunit2 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz;
endcase
s7: sum = sum - delta;
s8: selectslice = (sum & 32'd3);
s9: begin
case (selectslice)
2'b00: workunit1 = workunit1 - (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[127:96]));
2'b01: workunit1 = workunit1 - (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[95:64]));
2'b10: workunit1 = workunit1 - (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[63:32]));
2'b11: workunit1 = workunit1 - (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[31:0]));
default: workunit1 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz;
endcase
x = x + 1'b1;
end
/* States 10-14 used for encipher operations */
s10: selectslice = (sum & 32'd3);
s11: case (selectslice)
2'b00: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[127:96]));
2'b01: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[95:64]));
2'b10: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[63:32]));
2'b11: workunit1 = workunit1 + (((workunit2 << 4 ^ workunit2 >> 5) + workunit2) ^ (sum + key_in[31:0]));
default: workunit1 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz;
endcase
s12: sum = sum + delta;
s13: selectslice = (sum >> 32'd11 & 32'd3);
s14: begin
case (selectslice)
2'b00: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[127:96]));
2'b01: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[95:64]));
2'b10: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[63:32]));
2'b11: workunit2 = workunit2 + (((workunit1 << 4 ^ workunit1 >> 5) + workunit1) ^ (sum + key_in[31:0]));
default: workunit2 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz;
endcase
x = x + 1'b1;
end
s15: begin
//This state was added to fix a timing issue.
//Same issue as above - trying to read workunit1 & workunit2 before they've settled.
end
s16: begin
//set the outputs to the working registers
data_out1 = workunit1;
data_out2 = workunit2;
end
s17: all_done = 1'b1;
default: begin
data_out1 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz;
data_out2 = 32'bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz;
end
endcase
end
end
 
endmodule

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