diff options
| -rw-r--r-- | src/rtl/aes.v | 586 | ||||
| -rw-r--r-- | src/rtl/aes_core.v | 344 | ||||
| -rw-r--r-- | src/rtl/aes_decipher_block.v | 542 | ||||
| -rw-r--r-- | src/rtl/aes_encipher_block.v | 501 | ||||
| -rw-r--r-- | src/rtl/aes_inv_sbox.v | 1136 | ||||
| -rw-r--r-- | src/rtl/aes_key_mem.v | 479 | ||||
| -rw-r--r-- | src/rtl/aes_sbox.v | 1137 |
7 files changed, 4725 insertions, 0 deletions
diff --git a/src/rtl/aes.v b/src/rtl/aes.v new file mode 100644 index 0000000..2ead578 --- /dev/null +++ b/src/rtl/aes.v @@ -0,0 +1,586 @@ +//====================================================================== +// +// aes.v +// -------- +// Top level wrapper for the AES block cipher core. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes( + // Clock and reset. + input wire clk, + input wire reset_n, + + // Control. + input wire cs, + input wire we, + + // Data ports. + input wire [7 : 0] address, + input wire [31 : 0] write_data, + output wire [31 : 0] read_data, + output wire error + ); + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter ADDR_NAME0 = 8'h00; + parameter ADDR_NAME1 = 8'h01; + parameter ADDR_VERSION = 8'h02; + + parameter ADDR_CTRL = 8'h08; + parameter CTRL_INIT_BIT = 0; + parameter CTRL_NEXT_BIT = 1; + + parameter ADDR_CONFIG = 8'h09; + parameter CTRL_ENCDEC_BIT = 0; + parameter CTRL_KEYLEN_BIT = 1; + + parameter ADDR_STATUS = 8'h0a; + parameter STATUS_READY_BIT = 0; + parameter STATUS_VALID_BIT = 1; + + parameter ADDR_KEY0 = 8'h10; + parameter ADDR_KEY1 = 8'h11; + parameter ADDR_KEY2 = 8'h12; + parameter ADDR_KEY3 = 8'h13; + parameter ADDR_KEY4 = 8'h14; + parameter ADDR_KEY5 = 8'h15; + parameter ADDR_KEY6 = 8'h16; + parameter ADDR_KEY7 = 8'h17; + + parameter ADDR_BLOCK0 = 8'h20; + parameter ADDR_BLOCK1 = 8'h21; + parameter ADDR_BLOCK2 = 8'h22; + parameter ADDR_BLOCK3 = 8'h23; + + parameter ADDR_RESULT0 = 8'h30; + parameter ADDR_RESULT1 = 8'h31; + parameter ADDR_RESULT2 = 8'h32; + parameter ADDR_RESULT3 = 8'h33; + + parameter CORE_NAME0 = 32'h6165732d; // "aes-" + parameter CORE_NAME1 = 32'h31323820; // "128 " + parameter CORE_VERSION = 32'h302e3530; // "0.50" + + + //---------------------------------------------------------------- + // Registers including update variables and write enable. + //---------------------------------------------------------------- + reg init_reg; + reg init_new; + reg init_we; + reg init_set; + + reg next_reg; + reg next_new; + reg next_we; + reg next_set; + + reg encdec_reg; + reg keylen_reg; + reg config_we; + + reg [31 : 0] block0_reg; + reg block0_we; + reg [31 : 0] block1_reg; + reg block1_we; + reg [31 : 0] block2_reg; + reg block2_we; + reg [31 : 0] block3_reg; + reg block3_we; + + reg [31 : 0] key0_reg; + reg key0_we; + reg [31 : 0] key1_reg; + reg key1_we; + reg [31 : 0] key2_reg; + reg key2_we; + reg [31 : 0] key3_reg; + reg key3_we; + reg [31 : 0] key4_reg; + reg key4_we; + reg [31 : 0] key5_reg; + reg key5_we; + reg [31 : 0] key6_reg; + reg key6_we; + reg [31 : 0] key7_reg; + reg key7_we; + + reg [127 : 0] result_reg; + reg valid_reg; + reg ready_reg; + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg [31 : 0] tmp_read_data; + reg tmp_error; + + wire core_encdec; + wire core_init; + wire core_next; + wire core_ready; + wire [255 : 0] core_key; + wire core_keylen; + wire [127 : 0] core_block; + wire [127 : 0] core_result; + wire core_valid; + + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign read_data = tmp_read_data; + assign error = tmp_error; + + assign core_key = {key0_reg, key1_reg, key2_reg, key3_reg, + key4_reg, key5_reg, key6_reg, key7_reg}; + + assign core_block = {block0_reg, block1_reg, block2_reg, block3_reg}; + assign core_init = init_reg; + assign core_next = next_reg; + assign core_encdec = encdec_reg; + assign core_keylen = keylen_reg; + + + //---------------------------------------------------------------- + // core instantiation. + //---------------------------------------------------------------- + aes_core core( + .clk(clk), + .reset_n(reset_n), + + .encdec(core_encdec), + .init(core_init), + .next(core_next), + .ready(core_ready), + + .key(core_key), + .keylen(core_keylen), + + .block(core_block), + .result(core_result), + .result_valid(core_valid) + ); + + + //---------------------------------------------------------------- + // reg_update + // Update functionality for all registers in the core. + // All registers are positive edge triggered with asynchronous + // active low reset. + //---------------------------------------------------------------- + always @ (posedge clk or negedge reset_n) + begin + if (!reset_n) + begin + block0_reg <= 32'h00000000; + block1_reg <= 32'h00000000; + block2_reg <= 32'h00000000; + block3_reg <= 32'h00000000; + + key0_reg <= 32'h00000000; + key1_reg <= 32'h00000000; + key2_reg <= 32'h00000000; + key3_reg <= 32'h00000000; + key4_reg <= 32'h00000000; + key5_reg <= 32'h00000000; + key6_reg <= 32'h00000000; + key7_reg <= 32'h00000000; + + init_reg <= 0; + next_reg <= 0; + encdec_reg <= 0; + keylen_reg <= 0; + + result_reg <= 128'h00000000000000000000000000000000; + valid_reg <= 0; + ready_reg <= 0; + end + else + begin + ready_reg <= core_ready; + valid_reg <= core_valid; + result_reg <= core_result; + + if (init_we) + begin + init_reg <= init_new; + end + + if (next_we) + begin + next_reg <= next_new; + end + + if (config_we) + begin + encdec_reg <= write_data[CTRL_ENCDEC_BIT]; + keylen_reg <= write_data[CTRL_KEYLEN_BIT]; + end + + if (key0_we) + begin + key0_reg <= write_data; + end + + if (key1_we) + begin + key1_reg <= write_data; + end + + if (key2_we) + begin + key2_reg <= write_data; + end + + if (key3_we) + begin + key3_reg <= write_data; + end + + if (key4_we) + begin + key4_reg <= write_data; + end + + if (key5_we) + begin + key5_reg <= write_data; + end + + if (key6_we) + begin + key6_reg <= write_data; + end + + if (key7_we) + begin + key7_reg <= write_data; + end + + if (block0_we) + begin + block0_reg <= write_data; + end + + if (block1_we) + begin + block1_reg <= write_data; + end + + if (block2_we) + begin + block2_reg <= write_data; + end + + if (block3_we) + begin + block3_reg <= write_data; + end + end + end // reg_update + + + //---------------------------------------------------------------- + // flag_ctrl + // + // Logic to set and the automatically reset init- and + // next flags that has been set. + //---------------------------------------------------------------- + always @* + begin : flag_reset + init_new = 0; + init_we = 0; + next_new = 0; + next_we = 0; + + if (init_set) + begin + init_new = 1; + init_we = 1; + end + else if (init_reg) + begin + init_new = 0; + init_we = 1; + end + + if (next_set) + begin + next_new = 1; + next_we = 1; + end + else if (next_reg) + begin + next_new = 0; + next_we = 1; + end + end + + + //---------------------------------------------------------------- + // api + // + // The interface command decoding logic. + //---------------------------------------------------------------- + always @* + begin : api + init_set = 0; + next_set = 0; + config_we = 0; + key0_we = 0; + key1_we = 0; + key2_we = 0; + key3_we = 0; + key4_we = 0; + key5_we = 0; + key6_we = 0; + key7_we = 0; + block0_we = 0; + block1_we = 0; + block2_we = 0; + block3_we = 0; + tmp_read_data = 32'h00000000; + tmp_error = 0; + + if (cs) + begin + if (we) + begin + case (address) + // Write operations. + ADDR_CTRL: + begin + init_set = write_data[CTRL_INIT_BIT]; + next_set = write_data[CTRL_NEXT_BIT]; + end + + ADDR_CONFIG: + begin + config_we = 1; + end + + ADDR_KEY0: + begin + key0_we = 1; + end + + ADDR_KEY1: + begin + key1_we = 1; + end + + ADDR_KEY2: + begin + key2_we = 1; + end + + ADDR_KEY3: + begin + key3_we = 1; + end + + ADDR_KEY4: + begin + key4_we = 1; + end + + ADDR_KEY5: + begin + key5_we = 1; + end + + ADDR_KEY6: + begin + key6_we = 1; + end + + ADDR_KEY7: + begin + key7_we = 1; + end + + ADDR_BLOCK0: + begin + block0_we = 1; + end + + ADDR_BLOCK1: + begin + block1_we = 1; + end + + ADDR_BLOCK2: + begin + block2_we = 1; + end + + ADDR_BLOCK3: + begin + block3_we = 1; + end + + default: + begin + tmp_error = 1; + end + endcase // case (address) + end // if (we) + + else + begin + case (address) + // Read operations. + ADDR_NAME0: + begin + tmp_read_data = CORE_NAME0; + end + + ADDR_NAME1: + begin + tmp_read_data = CORE_NAME1; + end + + ADDR_VERSION: + begin + tmp_read_data = CORE_VERSION; + end + + ADDR_CTRL: + begin + tmp_read_data = {28'h0000000, keylen_reg, encdec_reg, + next_reg, init_reg}; + end + + ADDR_STATUS: + begin + tmp_read_data = {30'h00000000, valid_reg, ready_reg}; + end + + ADDR_KEY0: + begin + tmp_read_data = key0_reg; + end + + ADDR_KEY1: + begin + tmp_read_data = key1_reg; + end + + ADDR_KEY2: + begin + tmp_read_data = key2_reg; + end + + ADDR_KEY3: + begin + tmp_read_data = key3_reg; + end + + ADDR_KEY4: + begin + tmp_read_data = key4_reg; + end + + ADDR_KEY5: + begin + tmp_read_data = key5_reg; + end + + ADDR_KEY6: + begin + tmp_read_data = key6_reg; + end + + ADDR_KEY7: + begin + tmp_read_data = key7_reg; + end + + ADDR_BLOCK0: + begin + tmp_read_data = block0_reg; + end + + ADDR_BLOCK1: + begin + tmp_read_data = block1_reg; + end + + ADDR_BLOCK2: + begin + tmp_read_data = block2_reg; + end + + ADDR_BLOCK3: + begin + tmp_read_data = block3_reg; + end + + ADDR_RESULT0: + begin + tmp_read_data = result_reg[127 : 96]; + end + + ADDR_RESULT1: + begin + tmp_read_data = result_reg[95 : 64]; + end + + ADDR_RESULT2: + begin + tmp_read_data = result_reg[63 : 32]; + end + + ADDR_RESULT3: + begin + tmp_read_data = result_reg[31 : 0]; + end + + default: + begin + tmp_error = 1; + end + endcase // case (address) + end + end + end // addr_decoder +endmodule // aes + +//====================================================================== +// EOF aes.v +//====================================================================== diff --git a/src/rtl/aes_core.v b/src/rtl/aes_core.v new file mode 100644 index 0000000..c43c943 --- /dev/null +++ b/src/rtl/aes_core.v @@ -0,0 +1,344 @@ +//====================================================================== +// +// aes.core.v +// ---------- +// The AES core. This core supports key size of 128, and 256 bits. +// Most of the functionality is within the submodules. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes_core( + input wire clk, + input wire reset_n, + + input wire encdec, + input wire init, + input wire next, + output wire ready, + + input wire [255 : 0] key, + input wire keylen, + + input wire [127 : 0] block, + output wire [127 : 0] result, + output wire result_valid + ); + + + + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter CTRL_IDLE = 2'h0; + parameter CTRL_INIT = 2'h1; + parameter CTRL_NEXT = 2'h2; + + + //---------------------------------------------------------------- + // Registers including update variables and write enable. + //---------------------------------------------------------------- + reg [1 : 0] aes_core_ctrl_reg; + reg [1 : 0] aes_core_ctrl_new; + reg aes_core_ctrl_we; + + reg result_valid_reg; + reg result_valid_new; + reg result_valid_we; + + reg ready_reg; + reg ready_new; + reg ready_we; + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg init_state; + + wire [127 : 0] round_key; + wire key_ready; + + reg enc_next; + wire [3 : 0] enc_round_nr; + wire [127 : 0] enc_new_block; + wire enc_ready; + wire [31 : 0] enc_sboxw; + + reg dec_next; + wire [3 : 0] dec_round_nr; + wire [127 : 0] dec_new_block; + wire dec_ready; + + reg [127 : 0] muxed_new_block; + reg [3 : 0] muxed_round_nr; + reg muxed_ready; + + wire [31 : 0] keymem_sboxw; + + reg [31 : 0] muxed_sboxw; + wire [31 : 0] new_sboxw; + + + //---------------------------------------------------------------- + // Instantiations. + //---------------------------------------------------------------- + aes_encipher_block enc_block( + .clk(clk), + .reset_n(reset_n), + + .next(enc_next), + + .keylen(keylen), + .round(enc_round_nr), + .round_key(round_key), + + .sboxw(enc_sboxw), + .new_sboxw(new_sboxw), + + .block(block), + .new_block(enc_new_block), + .ready(enc_ready) + ); + + + aes_decipher_block dec_block( + .clk(clk), + .reset_n(reset_n), + + .next(dec_next), + + .keylen(keylen), + .round(dec_round_nr), + .round_key(round_key), + + .block(block), + .new_block(dec_new_block), + .ready(dec_ready) + ); + + + aes_key_mem keymem( + .clk(clk), + .reset_n(reset_n), + + .key(key), + .keylen(keylen), + .init(init), + + .round(muxed_round_nr), + .round_key(round_key), + .ready(key_ready), + + .sboxw(keymem_sboxw), + .new_sboxw(new_sboxw) + ); + + + aes_sbox sbox(.sboxw(muxed_sboxw), .new_sboxw(new_sboxw)); + + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign ready = ready_reg; + assign result = muxed_new_block; + assign result_valid = result_valid_reg; + + + //---------------------------------------------------------------- + // reg_update + // + // Update functionality for all registers in the core. + // All registers are positive edge triggered with asynchronous + // active low reset. All registers have write enable. + //---------------------------------------------------------------- + always @ (posedge clk or negedge reset_n) + begin: reg_update + if (!reset_n) + begin + result_valid_reg <= 1'b0; + ready_reg <= 1'b1; + aes_core_ctrl_reg <= CTRL_IDLE; + end + else + begin + if (result_valid_we) + begin + result_valid_reg <= result_valid_new; + end + + if (ready_we) + begin + ready_reg <= ready_new; + end + + if (aes_core_ctrl_we) + begin + aes_core_ctrl_reg <= aes_core_ctrl_new; + end + end + end // reg_update + + + //---------------------------------------------------------------- + // sbox_mux + // + // Controls which of the encipher datapath or the key memory + // that gets access to the sbox. + //---------------------------------------------------------------- + always @* + begin : sbox_mux + if (init_state) + begin + muxed_sboxw = keymem_sboxw; + end + else + begin + muxed_sboxw = enc_sboxw; + end + end // sbox_mux + + + //---------------------------------------------------------------- + // encdex_mux + // + // Controls which of the datapaths that get the next signal, have + // access to the memory as well as the block processing result. + //---------------------------------------------------------------- + always @* + begin : encdec_mux + enc_next = 0; + dec_next = 0; + + if (encdec) + begin + // Encipher operations + enc_next = next; + muxed_round_nr = enc_round_nr; + muxed_new_block = enc_new_block; + muxed_ready = enc_ready; + end + else + begin + // Decipher operations + dec_next = next; + muxed_round_nr = dec_round_nr; + muxed_new_block = dec_new_block; + muxed_ready = dec_ready; + end + end // encdec_mux + + + //---------------------------------------------------------------- + // aes_core_ctrl + // + // Control FSM for aes core. Basically tracks if we are in + // key init, encipher or decipher modes and connects the + // different submodules to shared resources and interface ports. + //---------------------------------------------------------------- + always @* + begin : aes_core_ctrl + init_state = 0; + ready_new = 0; + ready_we = 0; + result_valid_new = 0; + result_valid_we = 0; + aes_core_ctrl_new = CTRL_IDLE; + aes_core_ctrl_we = 0; + + case (aes_core_ctrl_reg) + CTRL_IDLE: + begin + if (init) + begin + init_state = 1; + ready_new = 0; + ready_we = 1; + result_valid_new = 0; + result_valid_we = 1; + aes_core_ctrl_new = CTRL_INIT; + aes_core_ctrl_we = 1; + end + else if (next) + begin + init_state = 0; + ready_new = 0; + ready_we = 1; + result_valid_new = 0; + result_valid_we = 1; + aes_core_ctrl_new = CTRL_NEXT; + aes_core_ctrl_we = 1; + end + end + + CTRL_INIT: + begin + init_state = 1; + + if (key_ready) + begin + ready_new = 1; + ready_we = 1; + aes_core_ctrl_new = CTRL_IDLE; + aes_core_ctrl_we = 1; + end + end + + CTRL_NEXT: + begin + init_state = 0; + + if (muxed_ready) + begin + ready_new = 1; + ready_we = 1; + result_valid_new = 1; + result_valid_we = 1; + aes_core_ctrl_new = CTRL_IDLE; + aes_core_ctrl_we = 1; + end + end + + default: + begin + + end + endcase // case (aes_core_ctrl_reg) + + end // aes_core_ctrl +endmodule // aes_core + +//====================================================================== +// EOF aes_core.v +//====================================================================== diff --git a/src/rtl/aes_decipher_block.v b/src/rtl/aes_decipher_block.v new file mode 100644 index 0000000..ebcd164 --- /dev/null +++ b/src/rtl/aes_decipher_block.v @@ -0,0 +1,542 @@ +//====================================================================== +// +// aes_decipher_block.v +// -------------------- +// The AES decipher round. A pure combinational module that implements +// the initial round, main round and final round logic for +// decciper operations. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes_decipher_block( + input wire clk, + input wire reset_n, + + input wire next, + + input wire keylen, + output wire [3 : 0] round, + input wire [127 : 0] round_key, + + input wire [127 : 0] block, + output wire [127 : 0] new_block, + output wire ready + ); + + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter AES_128_BIT_KEY = 1'h0; + parameter AES_256_BIT_KEY = 1'h1; + + parameter AES128_ROUNDS = 4'ha; + parameter AES256_ROUNDS = 4'he; + + parameter NO_UPDATE = 3'h0; + parameter INIT_UPDATE = 3'h1; + parameter SBOX_UPDATE = 3'h2; + parameter MAIN_UPDATE = 3'h3; + parameter FINAL_UPDATE = 3'h4; + + parameter CTRL_IDLE = 3'h0; + parameter CTRL_INIT = 3'h1; + parameter CTRL_SBOX = 3'h2; + parameter CTRL_MAIN = 3'h3; + parameter CTRL_FINAL = 3'h4; + + + //---------------------------------------------------------------- + // Gaolis multiplication functions for Inverse MixColumn. + //---------------------------------------------------------------- + function [7 : 0] gm2(input [7 : 0] op); + begin + gm2 = {op[6 : 0], 1'b0} ^ (8'h1b & {8{op[7]}}); + end + endfunction // gm2 + + function [7 : 0] gm3(input [7 : 0] op); + begin + gm3 = gm2(op) ^ op; + end + endfunction // gm3 + + function [7 : 0] gm4(input [7 : 0] op); + begin + gm4 = gm2(gm2(op)); + end + endfunction // gm4 + + function [7 : 0] gm8(input [7 : 0] op); + begin + gm8 = gm2(gm4(op)); + end + endfunction // gm8 + + function [7 : 0] gm09(input [7 : 0] op); + begin + gm09 = gm8(op) ^ op; + end + endfunction // gm09 + + function [7 : 0] gm11(input [7 : 0] op); + begin + gm11 = gm8(op) ^ gm2(op) ^ op; + end + endfunction // gm11 + + function [7 : 0] gm13(input [7 : 0] op); + begin + gm13 = gm8(op) ^ gm4(op) ^ op; + end + endfunction // gm13 + + function [7 : 0] gm14(input [7 : 0] op); + begin + gm14 = gm8(op) ^ gm4(op) ^ gm2(op); + end + endfunction // gm14 + + function [31 : 0] inv_mixw(input [31 : 0] w); + reg [7 : 0] b0, b1, b2, b3; + reg [7 : 0] mb0, mb1, mb2, mb3; + begin + b0 = w[31 : 24]; + b1 = w[23 : 16]; + b2 = w[15 : 08]; + b3 = w[07 : 00]; + + mb0 = gm14(b0) ^ gm11(b1) ^ gm13(b2) ^ gm09(b3); + mb1 = gm09(b0) ^ gm14(b1) ^ gm11(b2) ^ gm13(b3); + mb2 = gm13(b0) ^ gm09(b1) ^ gm14(b2) ^ gm11(b3); + mb3 = gm11(b0) ^ gm13(b1) ^ gm09(b2) ^ gm14(b3); + + inv_mixw = {mb0, mb1, mb2, mb3}; + end + endfunction // mixw + + function [127 : 0] inv_mixcolumns(input [127 : 0] data); + reg [31 : 0] w0, w1, w2, w3; + reg [31 : 0] ws0, ws1, ws2, ws3; + begin + w0 = data[127 : 096]; + w1 = data[095 : 064]; + w2 = data[063 : 032]; + w3 = data[031 : 000]; + + ws0 = inv_mixw(w0); + ws1 = inv_mixw(w1); + ws2 = inv_mixw(w2); + ws3 = inv_mixw(w3); + + inv_mixcolumns = {ws0, ws1, ws2, ws3}; + end + endfunction // inv_mixcolumns + + function [127 : 0] inv_shiftrows(input [127 : 0] data); + reg [31 : 0] w0, w1, w2, w3; + reg [31 : 0] ws0, ws1, ws2, ws3; + begin + w0 = data[127 : 096]; + w1 = data[095 : 064]; + w2 = data[063 : 032]; + w3 = data[031 : 000]; + + ws0 = {w0[31 : 24], w3[23 : 16], w2[15 : 08], w1[07 : 00]}; + ws1 = {w1[31 : 24], w0[23 : 16], w3[15 : 08], w2[07 : 00]}; + ws2 = {w2[31 : 24], w1[23 : 16], w0[15 : 08], w3[07 : 00]}; + ws3 = {w3[31 : 24], w2[23 : 16], w1[15 : 08], w0[07 : 00]}; + + inv_shiftrows = {ws0, ws1, ws2, ws3}; + end + endfunction // inv_shiftrows + + function [127 : 0] addroundkey(input [127 : 0] data, input [127 : 0] rkey); + begin + addroundkey = data ^ rkey; + end + endfunction // addroundkey + + + //---------------------------------------------------------------- + // Registers including update variables and write enable. + //---------------------------------------------------------------- + reg [1 : 0] sword_ctr_reg; + reg [1 : 0] sword_ctr_new; + reg sword_ctr_we; + reg sword_ctr_inc; + reg sword_ctr_rst; + + reg [3 : 0] round_ctr_reg; + reg [3 : 0] round_ctr_new; + reg round_ctr_we; + reg round_ctr_set; + reg round_ctr_dec; + + reg [127 : 0] block_new; + reg [31 : 0] block_w0_reg; + reg [31 : 0] block_w1_reg; + reg [31 : 0] block_w2_reg; + reg [31 : 0] block_w3_reg; + reg block_w0_we; + reg block_w1_we; + reg block_w2_we; + reg block_w3_we; + + reg ready_reg; + reg ready_new; + reg ready_we; + + reg [2 : 0] dec_ctrl_reg; + reg [2 : 0] dec_ctrl_new; + reg dec_ctrl_we; + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg [31 : 0] tmp_sboxw; + wire [31 : 0] new_sboxw; + reg [2 : 0] update_type; + reg [3 : 0] num_rounds; + + + //---------------------------------------------------------------- + // Instantiations. + //---------------------------------------------------------------- + aes_inv_sbox inv_sbox(.sword(tmp_sboxw), .new_sword(new_sboxw)); + + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign round = round_ctr_reg; + assign new_block = {block_w0_reg, block_w1_reg, block_w2_reg, block_w3_reg}; + assign ready = ready_reg; + + + //---------------------------------------------------------------- + // reg_update + // + // Update functionality for all registers in the core. + // All registers are positive edge triggered with synchronous + // active low reset. All registers have write enable. + //---------------------------------------------------------------- + always @ (posedge clk or negedge reset_n) + begin: reg_update + if (!reset_n) + begin + block_w0_reg <= 32'h00000000; + block_w1_reg <= 32'h00000000; + block_w2_reg <= 32'h00000000; + block_w3_reg <= 32'h00000000; + sword_ctr_reg <= 2'h0; + round_ctr_reg <= 4'h0; + ready_reg <= 1; + dec_ctrl_reg <= CTRL_IDLE; + end + else + begin + if (block_w0_we) + begin + block_w0_reg <= block_new[127 : 096]; + end + + if (block_w1_we) + begin + block_w1_reg <= block_new[095 : 064]; + end + + if (block_w2_we) + begin + block_w2_reg <= block_new[063 : 032]; + end + + if (block_w3_we) + begin + block_w3_reg <= block_new[031 : 000]; + end + + if (sword_ctr_we) + begin + sword_ctr_reg <= sword_ctr_new; + end + + if (round_ctr_we) + begin + round_ctr_reg <= round_ctr_new; + end + + if (ready_we) + begin + ready_reg <= ready_new; + end + + if (dec_ctrl_we) + begin + dec_ctrl_reg <= dec_ctrl_new; + end + end + end // reg_update + + + //---------------------------------------------------------------- + // round_logic + // + // The logic needed to implement init, main and final rounds. + //---------------------------------------------------------------- + always @* + begin : round_logic + reg [127 : 0] old_block, inv_shiftrows_block, inv_mixcolumns_block; + reg [127 : 0] addkey_block; + + inv_shiftrows_block = 128'h00000000000000000000000000000000; + inv_mixcolumns_block = 128'h00000000000000000000000000000000; + addkey_block = 128'h00000000000000000000000000000000; + block_new = 128'h00000000000000000000000000000000; + tmp_sboxw = 32'h00000000; + block_w0_we = 0; + block_w1_we = 0; + block_w2_we = 0; + block_w3_we = 0; + + old_block = {block_w0_reg, block_w1_reg, block_w2_reg, block_w3_reg}; + + // Update based on update type. + case (update_type) + // InitRound + INIT_UPDATE: + begin + old_block = block; + addkey_block = addroundkey(old_block, round_key); + inv_shiftrows_block = inv_shiftrows(addkey_block); + block_new = inv_shiftrows_block; + block_w0_we = 1; + block_w1_we = 1; + block_w2_we = 1; + block_w3_we = 1; + end + + SBOX_UPDATE: + begin + block_new = {new_sboxw, new_sboxw, new_sboxw, new_sboxw}; + + case (sword_ctr_reg) + 2'h0: + begin + tmp_sboxw = block_w0_reg; + block_w0_we = 1; + end + + 2'h1: + begin + tmp_sboxw = block_w1_reg; + block_w1_we = 1; + end + + 2'h2: + begin + tmp_sboxw = block_w2_reg; + block_w2_we = 1; + end + + 2'h3: + begin + tmp_sboxw = block_w3_reg; + block_w3_we = 1; + end + endcase // case (sbox_mux_ctrl_reg) + end + + MAIN_UPDATE: + begin + addkey_block = addroundkey(old_block, round_key); + inv_mixcolumns_block = inv_mixcolumns(addkey_block); + inv_shiftrows_block = inv_shiftrows(inv_mixcolumns_block); + block_new = inv_shiftrows_block; + block_w0_we = 1; + block_w1_we = 1; + block_w2_we = 1; + block_w3_we = 1; + end + + FINAL_UPDATE: + begin + block_new = addroundkey(old_block, round_key); + block_w0_we = 1; + block_w1_we = 1; + block_w2_we = 1; + block_w3_we = 1; + end + + default: + begin + end + endcase // case (update_type) + end // round_logic + + + //---------------------------------------------------------------- + // sword_ctr + // + // The subbytes word counter with reset and increase logic. + //---------------------------------------------------------------- + always @* + begin : sword_ctr + sword_ctr_new = 2'h0; + sword_ctr_we = 1'b0; + + if (sword_ctr_rst) + begin + sword_ctr_new = 2'h0; + sword_ctr_we = 1'b1; + end + else if (sword_ctr_inc) + begin + sword_ctr_new = sword_ctr_reg + 1'b1; + sword_ctr_we = 1'b1; + end + end // sword_ctr + + + //---------------------------------------------------------------- + // round_ctr + // + // The round counter with reset and increase logic. + //---------------------------------------------------------------- + always @* + begin : round_ctr + round_ctr_new = 4'h0; + round_ctr_we = 1'b0; + + if (round_ctr_set) + begin + if (keylen == AES_256_BIT_KEY) + begin + round_ctr_new = AES256_ROUNDS; + end + else + begin + round_ctr_new = AES128_ROUNDS; + end + round_ctr_we = 1'b1; + end + else if (round_ctr_dec) + begin + round_ctr_new = round_ctr_reg - 1'b1; + round_ctr_we = 1'b1; + end + end // round_ctr + + + //---------------------------------------------------------------- + // decipher_ctrl + // + // The FSM that controls the decipher operations. + //---------------------------------------------------------------- + always @* + begin: decipher_ctrl + sword_ctr_inc = 0; + sword_ctr_rst = 0; + round_ctr_dec = 0; + round_ctr_set = 0; + ready_new = 0; + ready_we = 0; + update_type = NO_UPDATE; + dec_ctrl_new = CTRL_IDLE; + dec_ctrl_we = 0; + + case(dec_ctrl_reg) + CTRL_IDLE: + begin + if (next) + begin + round_ctr_set = 1; + ready_new = 0; + ready_we = 1; + dec_ctrl_new = CTRL_INIT; + dec_ctrl_we = 1; + end + end + + CTRL_INIT: + begin + sword_ctr_rst = 1; + update_type = INIT_UPDATE; + dec_ctrl_new = CTRL_SBOX; + dec_ctrl_we = 1; + end + + CTRL_SBOX: + begin + sword_ctr_inc = 1; + update_type = SBOX_UPDATE; + if (sword_ctr_reg == 2'h3) + begin + round_ctr_dec = 1; + dec_ctrl_new = CTRL_MAIN; + dec_ctrl_we = 1; + end + end + + CTRL_MAIN: + begin + sword_ctr_rst = 1; + if (round_ctr_reg > 0) + begin + update_type = MAIN_UPDATE; + dec_ctrl_new = CTRL_SBOX; + dec_ctrl_we = 1; + end + else + begin + update_type = FINAL_UPDATE; + ready_new = 1; + ready_we = 1; + dec_ctrl_new = CTRL_IDLE; + dec_ctrl_we = 1; + end + end + + default: + begin + // Empty. Just here to make the synthesis tool happy. + end + endcase // case (dec_ctrl_reg) + end // decipher_ctrl + +endmodule // aes_decipher_block + +//====================================================================== +// EOF aes_decipher_block.v +//====================================================================== diff --git a/src/rtl/aes_encipher_block.v b/src/rtl/aes_encipher_block.v new file mode 100644 index 0000000..2761d5b --- /dev/null +++ b/src/rtl/aes_encipher_block.v @@ -0,0 +1,501 @@ +//====================================================================== +// +// aes_encipher_block.v +// -------------------- +// The AES encipher round. A pure combinational module that implements +// the initial round, main round and final round logic for +// enciper operations. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes_encipher_block( + input wire clk, + input wire reset_n, + + input wire next, + + input wire keylen, + output wire [3 : 0] round, + input wire [127 : 0] round_key, + + output wire [31 : 0] sboxw, + input wire [31 : 0] new_sboxw, + + input wire [127 : 0] block, + output wire [127 : 0] new_block, + output wire ready + ); + + + //---------------------------------------------------------------- + // Internal constant and parameter definitions. + //---------------------------------------------------------------- + parameter AES_128_BIT_KEY = 1'h0; + parameter AES_256_BIT_KEY = 1'h1; + + parameter AES128_ROUNDS = 4'ha; + parameter AES256_ROUNDS = 4'he; + + parameter NO_UPDATE = 3'h0; + parameter INIT_UPDATE = 3'h1; + parameter SBOX_UPDATE = 3'h2; + parameter MAIN_UPDATE = 3'h3; + parameter FINAL_UPDATE = 3'h4; + + parameter CTRL_IDLE = 3'h0; + parameter CTRL_INIT = 3'h1; + parameter CTRL_SBOX = 3'h2; + parameter CTRL_MAIN = 3'h3; + parameter CTRL_FINAL = 3'h4; + + + //---------------------------------------------------------------- + // Round functions with sub functions. + //---------------------------------------------------------------- + function [7 : 0] gm2(input [7 : 0] op); + begin + gm2 = {op[6 : 0], 1'b0} ^ (8'h1b & {8{op[7]}}); + end + endfunction // gm2 + + function [7 : 0] gm3(input [7 : 0] op); + begin + gm3 = gm2(op) ^ op; + end + endfunction // gm3 + + function [31 : 0] mixw(input [31 : 0] w); + reg [7 : 0] b0, b1, b2, b3; + reg [7 : 0] mb0, mb1, mb2, mb3; + begin + b0 = w[31 : 24]; + b1 = w[23 : 16]; + b2 = w[15 : 08]; + b3 = w[07 : 00]; + + mb0 = gm2(b0) ^ gm3(b1) ^ b2 ^ b3; + mb1 = b0 ^ gm2(b1) ^ gm3(b2) ^ b3; + mb2 = b0 ^ b1 ^ gm2(b2) ^ gm3(b3); + mb3 = gm3(b0) ^ b1 ^ b2 ^ gm2(b3); + + mixw = {mb0, mb1, mb2, mb3}; + end + endfunction // mixw + + function [127 : 0] mixcolumns(input [127 : 0] data); + reg [31 : 0] w0, w1, w2, w3; + reg [31 : 0] ws0, ws1, ws2, ws3; + begin + w0 = data[127 : 096]; + w1 = data[095 : 064]; + w2 = data[063 : 032]; + w3 = data[031 : 000]; + + ws0 = mixw(w0); + ws1 = mixw(w1); + ws2 = mixw(w2); + ws3 = mixw(w3); + + mixcolumns = {ws0, ws1, ws2, ws3}; + end + endfunction // mixcolumns + + function [127 : 0] shiftrows(input [127 : 0] data); + reg [31 : 0] w0, w1, w2, w3; + reg [31 : 0] ws0, ws1, ws2, ws3; + begin + w0 = data[127 : 096]; + w1 = data[095 : 064]; + w2 = data[063 : 032]; + w3 = data[031 : 000]; + + ws0 = {w0[31 : 24], w1[23 : 16], w2[15 : 08], w3[07 : 00]}; + ws1 = {w1[31 : 24], w2[23 : 16], w3[15 : 08], w0[07 : 00]}; + ws2 = {w2[31 : 24], w3[23 : 16], w0[15 : 08], w1[07 : 00]}; + ws3 = {w3[31 : 24], w0[23 : 16], w1[15 : 08], w2[07 : 00]}; + + shiftrows = {ws0, ws1, ws2, ws3}; + end + endfunction // shiftrows + + function [127 : 0] addroundkey(input [127 : 0] data, input [127 : 0] rkey); + begin + addroundkey = data ^ rkey; + end + endfunction // addroundkey + + + //---------------------------------------------------------------- + // Registers including update variables and write enable. + //---------------------------------------------------------------- + reg [1 : 0] sword_ctr_reg; + reg [1 : 0] sword_ctr_new; + reg sword_ctr_we; + reg sword_ctr_inc; + reg sword_ctr_rst; + + reg [3 : 0] round_ctr_reg; + reg [3 : 0] round_ctr_new; + reg round_ctr_we; + reg round_ctr_rst; + reg round_ctr_inc; + + reg [127 : 0] block_new; + reg [31 : 0] block_w0_reg; + reg [31 : 0] block_w1_reg; + reg [31 : 0] block_w2_reg; + reg [31 : 0] block_w3_reg; + reg block_w0_we; + reg block_w1_we; + reg block_w2_we; + reg block_w3_we; + + reg ready_reg; + reg ready_new; + reg ready_we; + + reg [2 : 0] enc_ctrl_reg; + reg [2 : 0] enc_ctrl_new; + reg enc_ctrl_we; + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg [2 : 0] update_type; + reg [31 : 0] muxed_sboxw; + + + //---------------------------------------------------------------- + // Concurrent connectivity for ports etc. + //---------------------------------------------------------------- + assign round = round_ctr_reg; + assign sboxw = muxed_sboxw; + assign new_block = {block_w0_reg, block_w1_reg, block_w2_reg, block_w3_reg}; + assign ready = ready_reg; + + + //---------------------------------------------------------------- + // reg_update + // + // Update functionality for all registers in the core. + // All registers are positive edge triggered with asynchronous + // active low reset. All registers have write enable. + //---------------------------------------------------------------- + always @ (posedge clk or negedge reset_n) + begin: reg_update + if (!reset_n) + begin + block_w0_reg <= 32'h00000000; + block_w1_reg <= 32'h00000000; + block_w2_reg <= 32'h00000000; + block_w3_reg <= 32'h00000000; + sword_ctr_reg <= 2'h0; + round_ctr_reg <= 4'h0; + ready_reg <= 1; + enc_ctrl_reg <= CTRL_IDLE; + end + else + begin + if (block_w0_we) + begin + block_w0_reg <= block_new[127 : 096]; + end + + if (block_w1_we) + begin + block_w1_reg <= block_new[095 : 064]; + end + + if (block_w2_we) + begin + block_w2_reg <= block_new[063 : 032]; + end + + if (block_w3_we) + begin + block_w3_reg <= block_new[031 : 000]; + end + + if (sword_ctr_we) + begin + sword_ctr_reg <= sword_ctr_new; + end + + if (round_ctr_we) + begin + round_ctr_reg <= round_ctr_new; + end + + if (ready_we) + begin + ready_reg <= ready_new; + end + + if (enc_ctrl_we) + begin + enc_ctrl_reg <= enc_ctrl_new; + end + end + end // reg_update + + + //---------------------------------------------------------------- + // round_logic + // + // The logic needed to implement init, main and final rounds. + //---------------------------------------------------------------- + always @* + begin : round_logic + reg [127 : 0] old_block, shiftrows_block, mixcolumns_block; + reg [127 : 0] addkey_init_block, addkey_main_block, addkey_final_block; + + block_new = 128'h00000000000000000000000000000000; + muxed_sboxw = 32'h00000000; + block_w0_we = 0; + block_w1_we = 0; + block_w2_we = 0; + block_w3_we = 0; + + old_block = {block_w0_reg, block_w1_reg, block_w2_reg, block_w3_reg}; + shiftrows_block = shiftrows(old_block); + mixcolumns_block = mixcolumns(shiftrows_block); + addkey_init_block = addroundkey(block, round_key); + addkey_main_block = addroundkey(mixcolumns_block, round_key); + addkey_final_block = addroundkey(shiftrows_block, round_key); + + case (update_type) + INIT_UPDATE: + begin + block_new = addkey_init_block; + block_w0_we = 1; + block_w1_we = 1; + block_w2_we = 1; + block_w3_we = 1; + end + + SBOX_UPDATE: + begin + block_new = {new_sboxw, new_sboxw, new_sboxw, new_sboxw}; + + case (sword_ctr_reg) + 2'h0: + begin + muxed_sboxw = block_w0_reg; + block_w0_we = 1; + end + + 2'h1: + begin + muxed_sboxw = block_w1_reg; + block_w1_we = 1; + end + + 2'h2: + begin + muxed_sboxw = block_w2_reg; + block_w2_we = 1; + end + + 2'h3: + begin + muxed_sboxw = block_w3_reg; + block_w3_we = 1; + end + endcase // case (sbox_mux_ctrl_reg) + end + + MAIN_UPDATE: + begin + block_new = addkey_main_block; + block_w0_we = 1; + block_w1_we = 1; + block_w2_we = 1; + block_w3_we = 1; + end + + FINAL_UPDATE: + begin + block_new = addkey_final_block; + block_w0_we = 1; + block_w1_we = 1; + block_w2_we = 1; + block_w3_we = 1; + end + + default: + begin + end + endcase // case (update_type) + end // round_logic + + + //---------------------------------------------------------------- + // sword_ctr + // + // The subbytes word counter with reset and increase logic. + //---------------------------------------------------------------- + always @* + begin : sword_ctr + sword_ctr_new = 2'h0; + sword_ctr_we = 1'b0; + + if (sword_ctr_rst) + begin + sword_ctr_new = 2'h0; + sword_ctr_we = 1'b1; + end + else if (sword_ctr_inc) + begin + sword_ctr_new = sword_ctr_reg + 1'b1; + sword_ctr_we = 1'b1; + end + end // sword_ctr + + + //---------------------------------------------------------------- + // round_ctr + // + // The round counter with reset and increase logic. + //---------------------------------------------------------------- + always @* + begin : round_ctr + round_ctr_new = 4'h0; + round_ctr_we = 1'b0; + + if (round_ctr_rst) + begin + round_ctr_new = 4'h0; + round_ctr_we = 1'b1; + end + else if (round_ctr_inc) + begin + round_ctr_new = round_ctr_reg + 1'b1; + round_ctr_we = 1'b1; + end + end // round_ctr + + + //---------------------------------------------------------------- + // encipher_ctrl + // + // The FSM that controls the encipher operations. + //---------------------------------------------------------------- + always @* + begin: encipher_ctrl + reg [3 : 0] num_rounds; + + if (keylen == AES_256_BIT_KEY) + begin + num_rounds = AES256_ROUNDS; + end + else + begin + num_rounds = AES128_ROUNDS; + end + + sword_ctr_inc = 0; + sword_ctr_rst = 0; + round_ctr_inc = 0; + round_ctr_rst = 0; + ready_new = 0; + ready_we = 0; + update_type = NO_UPDATE; + enc_ctrl_new = CTRL_IDLE; + enc_ctrl_we = 0; + + case(enc_ctrl_reg) + CTRL_IDLE: + begin + if (next) + begin + round_ctr_rst = 1; + ready_new = 0; + ready_we = 1; + enc_ctrl_new = CTRL_INIT; + enc_ctrl_we = 1; + end + end + + CTRL_INIT: + begin + round_ctr_inc = 1; + sword_ctr_rst = 1; + update_type = INIT_UPDATE; + enc_ctrl_new = CTRL_SBOX; + enc_ctrl_we = 1; + end + + CTRL_SBOX: + begin + sword_ctr_inc = 1; + update_type = SBOX_UPDATE; + if (sword_ctr_reg == 2'h3) + begin + enc_ctrl_new = CTRL_MAIN; + enc_ctrl_we = 1; + end + end + + CTRL_MAIN: + begin + sword_ctr_rst = 1; + round_ctr_inc = 1; + if (round_ctr_reg < num_rounds) + begin + update_type = MAIN_UPDATE; + enc_ctrl_new = CTRL_SBOX; + enc_ctrl_we = 1; + end + else + begin + update_type = FINAL_UPDATE; + ready_new = 1; + ready_we = 1; + enc_ctrl_new = CTRL_IDLE; + enc_ctrl_we = 1; + end + end + + default: + begin + // Empty. Just here to make the synthesis tool happy. + end + endcase // case (enc_ctrl_reg) + end // encipher_ctrl + +endmodule // aes_encipher_block + +//====================================================================== +// EOF aes_encipher_block.v +//====================================================================== diff --git a/src/rtl/aes_inv_sbox.v b/src/rtl/aes_inv_sbox.v new file mode 100644 index 0000000..6a3c01a --- /dev/null +++ b/src/rtl/aes_inv_sbox.v @@ -0,0 +1,1136 @@ +//====================================================================== +// +// aes_inv_sbox.v +// -------------- +// The inverse AES S-box. Basically a 256 Byte ROM. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes_inv_sbox( + input wire [31 : 0] sword, + output wire [31 : 0] new_sword + ); + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg [7 : 0] tmp_new_sbox0; + reg [7 : 0] tmp_new_sbox1; + reg [7 : 0] tmp_new_sbox2; + reg [7 : 0] tmp_new_sbox3; + + + //---------------------------------------------------------------- + // Concurrent assignments for ports. + //---------------------------------------------------------------- + assign new_sword = {tmp_new_sbox0, tmp_new_sbox1, + tmp_new_sbox2, tmp_new_sbox3}; + + + //---------------------------------------------------------------- + // inv_sbox_rom0 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : inv_sbox_rom0 + case(sword[31 : 24]) + 8'h00: tmp_new_sbox0 = 8'h52; + 8'h01: tmp_new_sbox0 = 8'h09; + 8'h02: tmp_new_sbox0 = 8'h6a; + 8'h03: tmp_new_sbox0 = 8'hd5; + 8'h04: tmp_new_sbox0 = 8'h30; + 8'h05: tmp_new_sbox0 = 8'h36; + 8'h06: tmp_new_sbox0 = 8'ha5; + 8'h07: tmp_new_sbox0 = 8'h38; + 8'h08: tmp_new_sbox0 = 8'hbf; + 8'h09: tmp_new_sbox0 = 8'h40; + 8'h0a: tmp_new_sbox0 = 8'ha3; + 8'h0b: tmp_new_sbox0 = 8'h9e; + 8'h0c: tmp_new_sbox0 = 8'h81; + 8'h0d: tmp_new_sbox0 = 8'hf3; + 8'h0e: tmp_new_sbox0 = 8'hd7; + 8'h0f: tmp_new_sbox0 = 8'hfb; + 8'h10: tmp_new_sbox0 = 8'h7c; + 8'h11: tmp_new_sbox0 = 8'he3; + 8'h12: tmp_new_sbox0 = 8'h39; + 8'h13: tmp_new_sbox0 = 8'h82; + 8'h14: tmp_new_sbox0 = 8'h9b; + 8'h15: tmp_new_sbox0 = 8'h2f; + 8'h16: tmp_new_sbox0 = 8'hff; + 8'h17: tmp_new_sbox0 = 8'h87; + 8'h18: tmp_new_sbox0 = 8'h34; + 8'h19: tmp_new_sbox0 = 8'h8e; + 8'h1a: tmp_new_sbox0 = 8'h43; + 8'h1b: tmp_new_sbox0 = 8'h44; + 8'h1c: tmp_new_sbox0 = 8'hc4; + 8'h1d: tmp_new_sbox0 = 8'hde; + 8'h1e: tmp_new_sbox0 = 8'he9; + 8'h1f: tmp_new_sbox0 = 8'hcb; + 8'h20: tmp_new_sbox0 = 8'h54; + 8'h21: tmp_new_sbox0 = 8'h7b; + 8'h22: tmp_new_sbox0 = 8'h94; + 8'h23: tmp_new_sbox0 = 8'h32; + 8'h24: tmp_new_sbox0 = 8'ha6; + 8'h25: tmp_new_sbox0 = 8'hc2; + 8'h26: tmp_new_sbox0 = 8'h23; + 8'h27: tmp_new_sbox0 = 8'h3d; + 8'h28: tmp_new_sbox0 = 8'hee; + 8'h29: tmp_new_sbox0 = 8'h4c; + 8'h2a: tmp_new_sbox0 = 8'h95; + 8'h2b: tmp_new_sbox0 = 8'h0b; + 8'h2c: tmp_new_sbox0 = 8'h42; + 8'h2d: tmp_new_sbox0 = 8'hfa; + 8'h2e: tmp_new_sbox0 = 8'hc3; + 8'h2f: tmp_new_sbox0 = 8'h4e; + 8'h30: tmp_new_sbox0 = 8'h08; + 8'h31: tmp_new_sbox0 = 8'h2e; + 8'h32: tmp_new_sbox0 = 8'ha1; + 8'h33: tmp_new_sbox0 = 8'h66; + 8'h34: tmp_new_sbox0 = 8'h28; + 8'h35: tmp_new_sbox0 = 8'hd9; + 8'h36: tmp_new_sbox0 = 8'h24; + 8'h37: tmp_new_sbox0 = 8'hb2; + 8'h38: tmp_new_sbox0 = 8'h76; + 8'h39: tmp_new_sbox0 = 8'h5b; + 8'h3a: tmp_new_sbox0 = 8'ha2; + 8'h3b: tmp_new_sbox0 = 8'h49; + 8'h3c: tmp_new_sbox0 = 8'h6d; + 8'h3d: tmp_new_sbox0 = 8'h8b; + 8'h3e: tmp_new_sbox0 = 8'hd1; + 8'h3f: tmp_new_sbox0 = 8'h25; + 8'h40: tmp_new_sbox0 = 8'h72; + 8'h41: tmp_new_sbox0 = 8'hf8; + 8'h42: tmp_new_sbox0 = 8'hf6; + 8'h43: tmp_new_sbox0 = 8'h64; + 8'h44: tmp_new_sbox0 = 8'h86; + 8'h45: tmp_new_sbox0 = 8'h68; + 8'h46: tmp_new_sbox0 = 8'h98; + 8'h47: tmp_new_sbox0 = 8'h16; + 8'h48: tmp_new_sbox0 = 8'hd4; + 8'h49: tmp_new_sbox0 = 8'ha4; + 8'h4a: tmp_new_sbox0 = 8'h5c; + 8'h4b: tmp_new_sbox0 = 8'hcc; + 8'h4c: tmp_new_sbox0 = 8'h5d; + 8'h4d: tmp_new_sbox0 = 8'h65; + 8'h4e: tmp_new_sbox0 = 8'hb6; + 8'h4f: tmp_new_sbox0 = 8'h92; + 8'h50: tmp_new_sbox0 = 8'h6c; + 8'h51: tmp_new_sbox0 = 8'h70; + 8'h52: tmp_new_sbox0 = 8'h48; + 8'h53: tmp_new_sbox0 = 8'h50; + 8'h54: tmp_new_sbox0 = 8'hfd; + 8'h55: tmp_new_sbox0 = 8'hed; + 8'h56: tmp_new_sbox0 = 8'hb9; + 8'h57: tmp_new_sbox0 = 8'hda; + 8'h58: tmp_new_sbox0 = 8'h5e; + 8'h59: tmp_new_sbox0 = 8'h15; + 8'h5a: tmp_new_sbox0 = 8'h46; + 8'h5b: tmp_new_sbox0 = 8'h57; + 8'h5c: tmp_new_sbox0 = 8'ha7; + 8'h5d: tmp_new_sbox0 = 8'h8d; + 8'h5e: tmp_new_sbox0 = 8'h9d; + 8'h5f: tmp_new_sbox0 = 8'h84; + 8'h60: tmp_new_sbox0 = 8'h90; + 8'h61: tmp_new_sbox0 = 8'hd8; + 8'h62: tmp_new_sbox0 = 8'hab; + 8'h63: tmp_new_sbox0 = 8'h00; + 8'h64: tmp_new_sbox0 = 8'h8c; + 8'h65: tmp_new_sbox0 = 8'hbc; + 8'h66: tmp_new_sbox0 = 8'hd3; + 8'h67: tmp_new_sbox0 = 8'h0a; + 8'h68: tmp_new_sbox0 = 8'hf7; + 8'h69: tmp_new_sbox0 = 8'he4; + 8'h6a: tmp_new_sbox0 = 8'h58; + 8'h6b: tmp_new_sbox0 = 8'h05; + 8'h6c: tmp_new_sbox0 = 8'hb8; + 8'h6d: tmp_new_sbox0 = 8'hb3; + 8'h6e: tmp_new_sbox0 = 8'h45; + 8'h6f: tmp_new_sbox0 = 8'h06; + 8'h70: tmp_new_sbox0 = 8'hd0; + 8'h71: tmp_new_sbox0 = 8'h2c; + 8'h72: tmp_new_sbox0 = 8'h1e; + 8'h73: tmp_new_sbox0 = 8'h8f; + 8'h74: tmp_new_sbox0 = 8'hca; + 8'h75: tmp_new_sbox0 = 8'h3f; + 8'h76: tmp_new_sbox0 = 8'h0f; + 8'h77: tmp_new_sbox0 = 8'h02; + 8'h78: tmp_new_sbox0 = 8'hc1; + 8'h79: tmp_new_sbox0 = 8'haf; + 8'h7a: tmp_new_sbox0 = 8'hbd; + 8'h7b: tmp_new_sbox0 = 8'h03; + 8'h7c: tmp_new_sbox0 = 8'h01; + 8'h7d: tmp_new_sbox0 = 8'h13; + 8'h7e: tmp_new_sbox0 = 8'h8a; + 8'h7f: tmp_new_sbox0 = 8'h6b; + 8'h80: tmp_new_sbox0 = 8'h3a; + 8'h81: tmp_new_sbox0 = 8'h91; + 8'h82: tmp_new_sbox0 = 8'h11; + 8'h83: tmp_new_sbox0 = 8'h41; + 8'h84: tmp_new_sbox0 = 8'h4f; + 8'h85: tmp_new_sbox0 = 8'h67; + 8'h86: tmp_new_sbox0 = 8'hdc; + 8'h87: tmp_new_sbox0 = 8'hea; + 8'h88: tmp_new_sbox0 = 8'h97; + 8'h89: tmp_new_sbox0 = 8'hf2; + 8'h8a: tmp_new_sbox0 = 8'hcf; + 8'h8b: tmp_new_sbox0 = 8'hce; + 8'h8c: tmp_new_sbox0 = 8'hf0; + 8'h8d: tmp_new_sbox0 = 8'hb4; + 8'h8e: tmp_new_sbox0 = 8'he6; + 8'h8f: tmp_new_sbox0 = 8'h73; + 8'h90: tmp_new_sbox0 = 8'h96; + 8'h91: tmp_new_sbox0 = 8'hac; + 8'h92: tmp_new_sbox0 = 8'h74; + 8'h93: tmp_new_sbox0 = 8'h22; + 8'h94: tmp_new_sbox0 = 8'he7; + 8'h95: tmp_new_sbox0 = 8'had; + 8'h96: tmp_new_sbox0 = 8'h35; + 8'h97: tmp_new_sbox0 = 8'h85; + 8'h98: tmp_new_sbox0 = 8'he2; + 8'h99: tmp_new_sbox0 = 8'hf9; + 8'h9a: tmp_new_sbox0 = 8'h37; + 8'h9b: tmp_new_sbox0 = 8'he8; + 8'h9c: tmp_new_sbox0 = 8'h1c; + 8'h9d: tmp_new_sbox0 = 8'h75; + 8'h9e: tmp_new_sbox0 = 8'hdf; + 8'h9f: tmp_new_sbox0 = 8'h6e; + 8'ha0: tmp_new_sbox0 = 8'h47; + 8'ha1: tmp_new_sbox0 = 8'hf1; + 8'ha2: tmp_new_sbox0 = 8'h1a; + 8'ha3: tmp_new_sbox0 = 8'h71; + 8'ha4: tmp_new_sbox0 = 8'h1d; + 8'ha5: tmp_new_sbox0 = 8'h29; + 8'ha6: tmp_new_sbox0 = 8'hc5; + 8'ha7: tmp_new_sbox0 = 8'h89; + 8'ha8: tmp_new_sbox0 = 8'h6f; + 8'ha9: tmp_new_sbox0 = 8'hb7; + 8'haa: tmp_new_sbox0 = 8'h62; + 8'hab: tmp_new_sbox0 = 8'h0e; + 8'hac: tmp_new_sbox0 = 8'haa; + 8'had: tmp_new_sbox0 = 8'h18; + 8'hae: tmp_new_sbox0 = 8'hbe; + 8'haf: tmp_new_sbox0 = 8'h1b; + 8'hb0: tmp_new_sbox0 = 8'hfc; + 8'hb1: tmp_new_sbox0 = 8'h56; + 8'hb2: tmp_new_sbox0 = 8'h3e; + 8'hb3: tmp_new_sbox0 = 8'h4b; + 8'hb4: tmp_new_sbox0 = 8'hc6; + 8'hb5: tmp_new_sbox0 = 8'hd2; + 8'hb6: tmp_new_sbox0 = 8'h79; + 8'hb7: tmp_new_sbox0 = 8'h20; + 8'hb8: tmp_new_sbox0 = 8'h9a; + 8'hb9: tmp_new_sbox0 = 8'hdb; + 8'hba: tmp_new_sbox0 = 8'hc0; + 8'hbb: tmp_new_sbox0 = 8'hfe; + 8'hbc: tmp_new_sbox0 = 8'h78; + 8'hbd: tmp_new_sbox0 = 8'hcd; + 8'hbe: tmp_new_sbox0 = 8'h5a; + 8'hbf: tmp_new_sbox0 = 8'hf4; + 8'hc0: tmp_new_sbox0 = 8'h1f; + 8'hc1: tmp_new_sbox0 = 8'hdd; + 8'hc2: tmp_new_sbox0 = 8'ha8; + 8'hc3: tmp_new_sbox0 = 8'h33; + 8'hc4: tmp_new_sbox0 = 8'h88; + 8'hc5: tmp_new_sbox0 = 8'h07; + 8'hc6: tmp_new_sbox0 = 8'hc7; + 8'hc7: tmp_new_sbox0 = 8'h31; + 8'hc8: tmp_new_sbox0 = 8'hb1; + 8'hc9: tmp_new_sbox0 = 8'h12; + 8'hca: tmp_new_sbox0 = 8'h10; + 8'hcb: tmp_new_sbox0 = 8'h59; + 8'hcc: tmp_new_sbox0 = 8'h27; + 8'hcd: tmp_new_sbox0 = 8'h80; + 8'hce: tmp_new_sbox0 = 8'hec; + 8'hcf: tmp_new_sbox0 = 8'h5f; + 8'hd0: tmp_new_sbox0 = 8'h60; + 8'hd1: tmp_new_sbox0 = 8'h51; + 8'hd2: tmp_new_sbox0 = 8'h7f; + 8'hd3: tmp_new_sbox0 = 8'ha9; + 8'hd4: tmp_new_sbox0 = 8'h19; + 8'hd5: tmp_new_sbox0 = 8'hb5; + 8'hd6: tmp_new_sbox0 = 8'h4a; + 8'hd7: tmp_new_sbox0 = 8'h0d; + 8'hd8: tmp_new_sbox0 = 8'h2d; + 8'hd9: tmp_new_sbox0 = 8'he5; + 8'hda: tmp_new_sbox0 = 8'h7a; + 8'hdb: tmp_new_sbox0 = 8'h9f; + 8'hdc: tmp_new_sbox0 = 8'h93; + 8'hdd: tmp_new_sbox0 = 8'hc9; + 8'hde: tmp_new_sbox0 = 8'h9c; + 8'hdf: tmp_new_sbox0 = 8'hef; + 8'he0: tmp_new_sbox0 = 8'ha0; + 8'he1: tmp_new_sbox0 = 8'he0; + 8'he2: tmp_new_sbox0 = 8'h3b; + 8'he3: tmp_new_sbox0 = 8'h4d; + 8'he4: tmp_new_sbox0 = 8'hae; + 8'he5: tmp_new_sbox0 = 8'h2a; + 8'he6: tmp_new_sbox0 = 8'hf5; + 8'he7: tmp_new_sbox0 = 8'hb0; + 8'he8: tmp_new_sbox0 = 8'hc8; + 8'he9: tmp_new_sbox0 = 8'heb; + 8'hea: tmp_new_sbox0 = 8'hbb; + 8'heb: tmp_new_sbox0 = 8'h3c; + 8'hec: tmp_new_sbox0 = 8'h83; + 8'hed: tmp_new_sbox0 = 8'h53; + 8'hee: tmp_new_sbox0 = 8'h99; + 8'hef: tmp_new_sbox0 = 8'h61; + 8'hf0: tmp_new_sbox0 = 8'h17; + 8'hf1: tmp_new_sbox0 = 8'h2b; + 8'hf2: tmp_new_sbox0 = 8'h04; + 8'hf3: tmp_new_sbox0 = 8'h7e; + 8'hf4: tmp_new_sbox0 = 8'hba; + 8'hf5: tmp_new_sbox0 = 8'h77; + 8'hf6: tmp_new_sbox0 = 8'hd6; + 8'hf7: tmp_new_sbox0 = 8'h26; + 8'hf8: tmp_new_sbox0 = 8'he1; + 8'hf9: tmp_new_sbox0 = 8'h69; + 8'hfa: tmp_new_sbox0 = 8'h14; + 8'hfb: tmp_new_sbox0 = 8'h63; + 8'hfc: tmp_new_sbox0 = 8'h55; + 8'hfd: tmp_new_sbox0 = 8'h21; + 8'hfe: tmp_new_sbox0 = 8'h0c; + 8'hff: tmp_new_sbox0 = 8'h7d; + endcase // case (sword) + end // inv_sbox_rom0 + + + //---------------------------------------------------------------- + // inv_sbox_rom1 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : inv_sbox_rom1 + case(sword[23 : 16]) + 8'h00: tmp_new_sbox1 = 8'h52; + 8'h01: tmp_new_sbox1 = 8'h09; + 8'h02: tmp_new_sbox1 = 8'h6a; + 8'h03: tmp_new_sbox1 = 8'hd5; + 8'h04: tmp_new_sbox1 = 8'h30; + 8'h05: tmp_new_sbox1 = 8'h36; + 8'h06: tmp_new_sbox1 = 8'ha5; + 8'h07: tmp_new_sbox1 = 8'h38; + 8'h08: tmp_new_sbox1 = 8'hbf; + 8'h09: tmp_new_sbox1 = 8'h40; + 8'h0a: tmp_new_sbox1 = 8'ha3; + 8'h0b: tmp_new_sbox1 = 8'h9e; + 8'h0c: tmp_new_sbox1 = 8'h81; + 8'h0d: tmp_new_sbox1 = 8'hf3; + 8'h0e: tmp_new_sbox1 = 8'hd7; + 8'h0f: tmp_new_sbox1 = 8'hfb; + 8'h10: tmp_new_sbox1 = 8'h7c; + 8'h11: tmp_new_sbox1 = 8'he3; + 8'h12: tmp_new_sbox1 = 8'h39; + 8'h13: tmp_new_sbox1 = 8'h82; + 8'h14: tmp_new_sbox1 = 8'h9b; + 8'h15: tmp_new_sbox1 = 8'h2f; + 8'h16: tmp_new_sbox1 = 8'hff; + 8'h17: tmp_new_sbox1 = 8'h87; + 8'h18: tmp_new_sbox1 = 8'h34; + 8'h19: tmp_new_sbox1 = 8'h8e; + 8'h1a: tmp_new_sbox1 = 8'h43; + 8'h1b: tmp_new_sbox1 = 8'h44; + 8'h1c: tmp_new_sbox1 = 8'hc4; + 8'h1d: tmp_new_sbox1 = 8'hde; + 8'h1e: tmp_new_sbox1 = 8'he9; + 8'h1f: tmp_new_sbox1 = 8'hcb; + 8'h20: tmp_new_sbox1 = 8'h54; + 8'h21: tmp_new_sbox1 = 8'h7b; + 8'h22: tmp_new_sbox1 = 8'h94; + 8'h23: tmp_new_sbox1 = 8'h32; + 8'h24: tmp_new_sbox1 = 8'ha6; + 8'h25: tmp_new_sbox1 = 8'hc2; + 8'h26: tmp_new_sbox1 = 8'h23; + 8'h27: tmp_new_sbox1 = 8'h3d; + 8'h28: tmp_new_sbox1 = 8'hee; + 8'h29: tmp_new_sbox1 = 8'h4c; + 8'h2a: tmp_new_sbox1 = 8'h95; + 8'h2b: tmp_new_sbox1 = 8'h0b; + 8'h2c: tmp_new_sbox1 = 8'h42; + 8'h2d: tmp_new_sbox1 = 8'hfa; + 8'h2e: tmp_new_sbox1 = 8'hc3; + 8'h2f: tmp_new_sbox1 = 8'h4e; + 8'h30: tmp_new_sbox1 = 8'h08; + 8'h31: tmp_new_sbox1 = 8'h2e; + 8'h32: tmp_new_sbox1 = 8'ha1; + 8'h33: tmp_new_sbox1 = 8'h66; + 8'h34: tmp_new_sbox1 = 8'h28; + 8'h35: tmp_new_sbox1 = 8'hd9; + 8'h36: tmp_new_sbox1 = 8'h24; + 8'h37: tmp_new_sbox1 = 8'hb2; + 8'h38: tmp_new_sbox1 = 8'h76; + 8'h39: tmp_new_sbox1 = 8'h5b; + 8'h3a: tmp_new_sbox1 = 8'ha2; + 8'h3b: tmp_new_sbox1 = 8'h49; + 8'h3c: tmp_new_sbox1 = 8'h6d; + 8'h3d: tmp_new_sbox1 = 8'h8b; + 8'h3e: tmp_new_sbox1 = 8'hd1; + 8'h3f: tmp_new_sbox1 = 8'h25; + 8'h40: tmp_new_sbox1 = 8'h72; + 8'h41: tmp_new_sbox1 = 8'hf8; + 8'h42: tmp_new_sbox1 = 8'hf6; + 8'h43: tmp_new_sbox1 = 8'h64; + 8'h44: tmp_new_sbox1 = 8'h86; + 8'h45: tmp_new_sbox1 = 8'h68; + 8'h46: tmp_new_sbox1 = 8'h98; + 8'h47: tmp_new_sbox1 = 8'h16; + 8'h48: tmp_new_sbox1 = 8'hd4; + 8'h49: tmp_new_sbox1 = 8'ha4; + 8'h4a: tmp_new_sbox1 = 8'h5c; + 8'h4b: tmp_new_sbox1 = 8'hcc; + 8'h4c: tmp_new_sbox1 = 8'h5d; + 8'h4d: tmp_new_sbox1 = 8'h65; + 8'h4e: tmp_new_sbox1 = 8'hb6; + 8'h4f: tmp_new_sbox1 = 8'h92; + 8'h50: tmp_new_sbox1 = 8'h6c; + 8'h51: tmp_new_sbox1 = 8'h70; + 8'h52: tmp_new_sbox1 = 8'h48; + 8'h53: tmp_new_sbox1 = 8'h50; + 8'h54: tmp_new_sbox1 = 8'hfd; + 8'h55: tmp_new_sbox1 = 8'hed; + 8'h56: tmp_new_sbox1 = 8'hb9; + 8'h57: tmp_new_sbox1 = 8'hda; + 8'h58: tmp_new_sbox1 = 8'h5e; + 8'h59: tmp_new_sbox1 = 8'h15; + 8'h5a: tmp_new_sbox1 = 8'h46; + 8'h5b: tmp_new_sbox1 = 8'h57; + 8'h5c: tmp_new_sbox1 = 8'ha7; + 8'h5d: tmp_new_sbox1 = 8'h8d; + 8'h5e: tmp_new_sbox1 = 8'h9d; + 8'h5f: tmp_new_sbox1 = 8'h84; + 8'h60: tmp_new_sbox1 = 8'h90; + 8'h61: tmp_new_sbox1 = 8'hd8; + 8'h62: tmp_new_sbox1 = 8'hab; + 8'h63: tmp_new_sbox1 = 8'h00; + 8'h64: tmp_new_sbox1 = 8'h8c; + 8'h65: tmp_new_sbox1 = 8'hbc; + 8'h66: tmp_new_sbox1 = 8'hd3; + 8'h67: tmp_new_sbox1 = 8'h0a; + 8'h68: tmp_new_sbox1 = 8'hf7; + 8'h69: tmp_new_sbox1 = 8'he4; + 8'h6a: tmp_new_sbox1 = 8'h58; + 8'h6b: tmp_new_sbox1 = 8'h05; + 8'h6c: tmp_new_sbox1 = 8'hb8; + 8'h6d: tmp_new_sbox1 = 8'hb3; + 8'h6e: tmp_new_sbox1 = 8'h45; + 8'h6f: tmp_new_sbox1 = 8'h06; + 8'h70: tmp_new_sbox1 = 8'hd0; + 8'h71: tmp_new_sbox1 = 8'h2c; + 8'h72: tmp_new_sbox1 = 8'h1e; + 8'h73: tmp_new_sbox1 = 8'h8f; + 8'h74: tmp_new_sbox1 = 8'hca; + 8'h75: tmp_new_sbox1 = 8'h3f; + 8'h76: tmp_new_sbox1 = 8'h0f; + 8'h77: tmp_new_sbox1 = 8'h02; + 8'h78: tmp_new_sbox1 = 8'hc1; + 8'h79: tmp_new_sbox1 = 8'haf; + 8'h7a: tmp_new_sbox1 = 8'hbd; + 8'h7b: tmp_new_sbox1 = 8'h03; + 8'h7c: tmp_new_sbox1 = 8'h01; + 8'h7d: tmp_new_sbox1 = 8'h13; + 8'h7e: tmp_new_sbox1 = 8'h8a; + 8'h7f: tmp_new_sbox1 = 8'h6b; + 8'h80: tmp_new_sbox1 = 8'h3a; + 8'h81: tmp_new_sbox1 = 8'h91; + 8'h82: tmp_new_sbox1 = 8'h11; + 8'h83: tmp_new_sbox1 = 8'h41; + 8'h84: tmp_new_sbox1 = 8'h4f; + 8'h85: tmp_new_sbox1 = 8'h67; + 8'h86: tmp_new_sbox1 = 8'hdc; + 8'h87: tmp_new_sbox1 = 8'hea; + 8'h88: tmp_new_sbox1 = 8'h97; + 8'h89: tmp_new_sbox1 = 8'hf2; + 8'h8a: tmp_new_sbox1 = 8'hcf; + 8'h8b: tmp_new_sbox1 = 8'hce; + 8'h8c: tmp_new_sbox1 = 8'hf0; + 8'h8d: tmp_new_sbox1 = 8'hb4; + 8'h8e: tmp_new_sbox1 = 8'he6; + 8'h8f: tmp_new_sbox1 = 8'h73; + 8'h90: tmp_new_sbox1 = 8'h96; + 8'h91: tmp_new_sbox1 = 8'hac; + 8'h92: tmp_new_sbox1 = 8'h74; + 8'h93: tmp_new_sbox1 = 8'h22; + 8'h94: tmp_new_sbox1 = 8'he7; + 8'h95: tmp_new_sbox1 = 8'had; + 8'h96: tmp_new_sbox1 = 8'h35; + 8'h97: tmp_new_sbox1 = 8'h85; + 8'h98: tmp_new_sbox1 = 8'he2; + 8'h99: tmp_new_sbox1 = 8'hf9; + 8'h9a: tmp_new_sbox1 = 8'h37; + 8'h9b: tmp_new_sbox1 = 8'he8; + 8'h9c: tmp_new_sbox1 = 8'h1c; + 8'h9d: tmp_new_sbox1 = 8'h75; + 8'h9e: tmp_new_sbox1 = 8'hdf; + 8'h9f: tmp_new_sbox1 = 8'h6e; + 8'ha0: tmp_new_sbox1 = 8'h47; + 8'ha1: tmp_new_sbox1 = 8'hf1; + 8'ha2: tmp_new_sbox1 = 8'h1a; + 8'ha3: tmp_new_sbox1 = 8'h71; + 8'ha4: tmp_new_sbox1 = 8'h1d; + 8'ha5: tmp_new_sbox1 = 8'h29; + 8'ha6: tmp_new_sbox1 = 8'hc5; + 8'ha7: tmp_new_sbox1 = 8'h89; + 8'ha8: tmp_new_sbox1 = 8'h6f; + 8'ha9: tmp_new_sbox1 = 8'hb7; + 8'haa: tmp_new_sbox1 = 8'h62; + 8'hab: tmp_new_sbox1 = 8'h0e; + 8'hac: tmp_new_sbox1 = 8'haa; + 8'had: tmp_new_sbox1 = 8'h18; + 8'hae: tmp_new_sbox1 = 8'hbe; + 8'haf: tmp_new_sbox1 = 8'h1b; + 8'hb0: tmp_new_sbox1 = 8'hfc; + 8'hb1: tmp_new_sbox1 = 8'h56; + 8'hb2: tmp_new_sbox1 = 8'h3e; + 8'hb3: tmp_new_sbox1 = 8'h4b; + 8'hb4: tmp_new_sbox1 = 8'hc6; + 8'hb5: tmp_new_sbox1 = 8'hd2; + 8'hb6: tmp_new_sbox1 = 8'h79; + 8'hb7: tmp_new_sbox1 = 8'h20; + 8'hb8: tmp_new_sbox1 = 8'h9a; + 8'hb9: tmp_new_sbox1 = 8'hdb; + 8'hba: tmp_new_sbox1 = 8'hc0; + 8'hbb: tmp_new_sbox1 = 8'hfe; + 8'hbc: tmp_new_sbox1 = 8'h78; + 8'hbd: tmp_new_sbox1 = 8'hcd; + 8'hbe: tmp_new_sbox1 = 8'h5a; + 8'hbf: tmp_new_sbox1 = 8'hf4; + 8'hc0: tmp_new_sbox1 = 8'h1f; + 8'hc1: tmp_new_sbox1 = 8'hdd; + 8'hc2: tmp_new_sbox1 = 8'ha8; + 8'hc3: tmp_new_sbox1 = 8'h33; + 8'hc4: tmp_new_sbox1 = 8'h88; + 8'hc5: tmp_new_sbox1 = 8'h07; + 8'hc6: tmp_new_sbox1 = 8'hc7; + 8'hc7: tmp_new_sbox1 = 8'h31; + 8'hc8: tmp_new_sbox1 = 8'hb1; + 8'hc9: tmp_new_sbox1 = 8'h12; + 8'hca: tmp_new_sbox1 = 8'h10; + 8'hcb: tmp_new_sbox1 = 8'h59; + 8'hcc: tmp_new_sbox1 = 8'h27; + 8'hcd: tmp_new_sbox1 = 8'h80; + 8'hce: tmp_new_sbox1 = 8'hec; + 8'hcf: tmp_new_sbox1 = 8'h5f; + 8'hd0: tmp_new_sbox1 = 8'h60; + 8'hd1: tmp_new_sbox1 = 8'h51; + 8'hd2: tmp_new_sbox1 = 8'h7f; + 8'hd3: tmp_new_sbox1 = 8'ha9; + 8'hd4: tmp_new_sbox1 = 8'h19; + 8'hd5: tmp_new_sbox1 = 8'hb5; + 8'hd6: tmp_new_sbox1 = 8'h4a; + 8'hd7: tmp_new_sbox1 = 8'h0d; + 8'hd8: tmp_new_sbox1 = 8'h2d; + 8'hd9: tmp_new_sbox1 = 8'he5; + 8'hda: tmp_new_sbox1 = 8'h7a; + 8'hdb: tmp_new_sbox1 = 8'h9f; + 8'hdc: tmp_new_sbox1 = 8'h93; + 8'hdd: tmp_new_sbox1 = 8'hc9; + 8'hde: tmp_new_sbox1 = 8'h9c; + 8'hdf: tmp_new_sbox1 = 8'hef; + 8'he0: tmp_new_sbox1 = 8'ha0; + 8'he1: tmp_new_sbox1 = 8'he0; + 8'he2: tmp_new_sbox1 = 8'h3b; + 8'he3: tmp_new_sbox1 = 8'h4d; + 8'he4: tmp_new_sbox1 = 8'hae; + 8'he5: tmp_new_sbox1 = 8'h2a; + 8'he6: tmp_new_sbox1 = 8'hf5; + 8'he7: tmp_new_sbox1 = 8'hb0; + 8'he8: tmp_new_sbox1 = 8'hc8; + 8'he9: tmp_new_sbox1 = 8'heb; + 8'hea: tmp_new_sbox1 = 8'hbb; + 8'heb: tmp_new_sbox1 = 8'h3c; + 8'hec: tmp_new_sbox1 = 8'h83; + 8'hed: tmp_new_sbox1 = 8'h53; + 8'hee: tmp_new_sbox1 = 8'h99; + 8'hef: tmp_new_sbox1 = 8'h61; + 8'hf0: tmp_new_sbox1 = 8'h17; + 8'hf1: tmp_new_sbox1 = 8'h2b; + 8'hf2: tmp_new_sbox1 = 8'h04; + 8'hf3: tmp_new_sbox1 = 8'h7e; + 8'hf4: tmp_new_sbox1 = 8'hba; + 8'hf5: tmp_new_sbox1 = 8'h77; + 8'hf6: tmp_new_sbox1 = 8'hd6; + 8'hf7: tmp_new_sbox1 = 8'h26; + 8'hf8: tmp_new_sbox1 = 8'he1; + 8'hf9: tmp_new_sbox1 = 8'h69; + 8'hfa: tmp_new_sbox1 = 8'h14; + 8'hfb: tmp_new_sbox1 = 8'h63; + 8'hfc: tmp_new_sbox1 = 8'h55; + 8'hfd: tmp_new_sbox1 = 8'h21; + 8'hfe: tmp_new_sbox1 = 8'h0c; + 8'hff: tmp_new_sbox1 = 8'h7d; + endcase // case (sword) + end // inv_sbox_rom1 + + + //---------------------------------------------------------------- + // inv_sbox_rom2 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : inv_sbox_rom2 + case(sword[15 : 8]) + 8'h00: tmp_new_sbox2 = 8'h52; + 8'h01: tmp_new_sbox2 = 8'h09; + 8'h02: tmp_new_sbox2 = 8'h6a; + 8'h03: tmp_new_sbox2 = 8'hd5; + 8'h04: tmp_new_sbox2 = 8'h30; + 8'h05: tmp_new_sbox2 = 8'h36; + 8'h06: tmp_new_sbox2 = 8'ha5; + 8'h07: tmp_new_sbox2 = 8'h38; + 8'h08: tmp_new_sbox2 = 8'hbf; + 8'h09: tmp_new_sbox2 = 8'h40; + 8'h0a: tmp_new_sbox2 = 8'ha3; + 8'h0b: tmp_new_sbox2 = 8'h9e; + 8'h0c: tmp_new_sbox2 = 8'h81; + 8'h0d: tmp_new_sbox2 = 8'hf3; + 8'h0e: tmp_new_sbox2 = 8'hd7; + 8'h0f: tmp_new_sbox2 = 8'hfb; + 8'h10: tmp_new_sbox2 = 8'h7c; + 8'h11: tmp_new_sbox2 = 8'he3; + 8'h12: tmp_new_sbox2 = 8'h39; + 8'h13: tmp_new_sbox2 = 8'h82; + 8'h14: tmp_new_sbox2 = 8'h9b; + 8'h15: tmp_new_sbox2 = 8'h2f; + 8'h16: tmp_new_sbox2 = 8'hff; + 8'h17: tmp_new_sbox2 = 8'h87; + 8'h18: tmp_new_sbox2 = 8'h34; + 8'h19: tmp_new_sbox2 = 8'h8e; + 8'h1a: tmp_new_sbox2 = 8'h43; + 8'h1b: tmp_new_sbox2 = 8'h44; + 8'h1c: tmp_new_sbox2 = 8'hc4; + 8'h1d: tmp_new_sbox2 = 8'hde; + 8'h1e: tmp_new_sbox2 = 8'he9; + 8'h1f: tmp_new_sbox2 = 8'hcb; + 8'h20: tmp_new_sbox2 = 8'h54; + 8'h21: tmp_new_sbox2 = 8'h7b; + 8'h22: tmp_new_sbox2 = 8'h94; + 8'h23: tmp_new_sbox2 = 8'h32; + 8'h24: tmp_new_sbox2 = 8'ha6; + 8'h25: tmp_new_sbox2 = 8'hc2; + 8'h26: tmp_new_sbox2 = 8'h23; + 8'h27: tmp_new_sbox2 = 8'h3d; + 8'h28: tmp_new_sbox2 = 8'hee; + 8'h29: tmp_new_sbox2 = 8'h4c; + 8'h2a: tmp_new_sbox2 = 8'h95; + 8'h2b: tmp_new_sbox2 = 8'h0b; + 8'h2c: tmp_new_sbox2 = 8'h42; + 8'h2d: tmp_new_sbox2 = 8'hfa; + 8'h2e: tmp_new_sbox2 = 8'hc3; + 8'h2f: tmp_new_sbox2 = 8'h4e; + 8'h30: tmp_new_sbox2 = 8'h08; + 8'h31: tmp_new_sbox2 = 8'h2e; + 8'h32: tmp_new_sbox2 = 8'ha1; + 8'h33: tmp_new_sbox2 = 8'h66; + 8'h34: tmp_new_sbox2 = 8'h28; + 8'h35: tmp_new_sbox2 = 8'hd9; + 8'h36: tmp_new_sbox2 = 8'h24; + 8'h37: tmp_new_sbox2 = 8'hb2; + 8'h38: tmp_new_sbox2 = 8'h76; + 8'h39: tmp_new_sbox2 = 8'h5b; + 8'h3a: tmp_new_sbox2 = 8'ha2; + 8'h3b: tmp_new_sbox2 = 8'h49; + 8'h3c: tmp_new_sbox2 = 8'h6d; + 8'h3d: tmp_new_sbox2 = 8'h8b; + 8'h3e: tmp_new_sbox2 = 8'hd1; + 8'h3f: tmp_new_sbox2 = 8'h25; + 8'h40: tmp_new_sbox2 = 8'h72; + 8'h41: tmp_new_sbox2 = 8'hf8; + 8'h42: tmp_new_sbox2 = 8'hf6; + 8'h43: tmp_new_sbox2 = 8'h64; + 8'h44: tmp_new_sbox2 = 8'h86; + 8'h45: tmp_new_sbox2 = 8'h68; + 8'h46: tmp_new_sbox2 = 8'h98; + 8'h47: tmp_new_sbox2 = 8'h16; + 8'h48: tmp_new_sbox2 = 8'hd4; + 8'h49: tmp_new_sbox2 = 8'ha4; + 8'h4a: tmp_new_sbox2 = 8'h5c; + 8'h4b: tmp_new_sbox2 = 8'hcc; + 8'h4c: tmp_new_sbox2 = 8'h5d; + 8'h4d: tmp_new_sbox2 = 8'h65; + 8'h4e: tmp_new_sbox2 = 8'hb6; + 8'h4f: tmp_new_sbox2 = 8'h92; + 8'h50: tmp_new_sbox2 = 8'h6c; + 8'h51: tmp_new_sbox2 = 8'h70; + 8'h52: tmp_new_sbox2 = 8'h48; + 8'h53: tmp_new_sbox2 = 8'h50; + 8'h54: tmp_new_sbox2 = 8'hfd; + 8'h55: tmp_new_sbox2 = 8'hed; + 8'h56: tmp_new_sbox2 = 8'hb9; + 8'h57: tmp_new_sbox2 = 8'hda; + 8'h58: tmp_new_sbox2 = 8'h5e; + 8'h59: tmp_new_sbox2 = 8'h15; + 8'h5a: tmp_new_sbox2 = 8'h46; + 8'h5b: tmp_new_sbox2 = 8'h57; + 8'h5c: tmp_new_sbox2 = 8'ha7; + 8'h5d: tmp_new_sbox2 = 8'h8d; + 8'h5e: tmp_new_sbox2 = 8'h9d; + 8'h5f: tmp_new_sbox2 = 8'h84; + 8'h60: tmp_new_sbox2 = 8'h90; + 8'h61: tmp_new_sbox2 = 8'hd8; + 8'h62: tmp_new_sbox2 = 8'hab; + 8'h63: tmp_new_sbox2 = 8'h00; + 8'h64: tmp_new_sbox2 = 8'h8c; + 8'h65: tmp_new_sbox2 = 8'hbc; + 8'h66: tmp_new_sbox2 = 8'hd3; + 8'h67: tmp_new_sbox2 = 8'h0a; + 8'h68: tmp_new_sbox2 = 8'hf7; + 8'h69: tmp_new_sbox2 = 8'he4; + 8'h6a: tmp_new_sbox2 = 8'h58; + 8'h6b: tmp_new_sbox2 = 8'h05; + 8'h6c: tmp_new_sbox2 = 8'hb8; + 8'h6d: tmp_new_sbox2 = 8'hb3; + 8'h6e: tmp_new_sbox2 = 8'h45; + 8'h6f: tmp_new_sbox2 = 8'h06; + 8'h70: tmp_new_sbox2 = 8'hd0; + 8'h71: tmp_new_sbox2 = 8'h2c; + 8'h72: tmp_new_sbox2 = 8'h1e; + 8'h73: tmp_new_sbox2 = 8'h8f; + 8'h74: tmp_new_sbox2 = 8'hca; + 8'h75: tmp_new_sbox2 = 8'h3f; + 8'h76: tmp_new_sbox2 = 8'h0f; + 8'h77: tmp_new_sbox2 = 8'h02; + 8'h78: tmp_new_sbox2 = 8'hc1; + 8'h79: tmp_new_sbox2 = 8'haf; + 8'h7a: tmp_new_sbox2 = 8'hbd; + 8'h7b: tmp_new_sbox2 = 8'h03; + 8'h7c: tmp_new_sbox2 = 8'h01; + 8'h7d: tmp_new_sbox2 = 8'h13; + 8'h7e: tmp_new_sbox2 = 8'h8a; + 8'h7f: tmp_new_sbox2 = 8'h6b; + 8'h80: tmp_new_sbox2 = 8'h3a; + 8'h81: tmp_new_sbox2 = 8'h91; + 8'h82: tmp_new_sbox2 = 8'h11; + 8'h83: tmp_new_sbox2 = 8'h41; + 8'h84: tmp_new_sbox2 = 8'h4f; + 8'h85: tmp_new_sbox2 = 8'h67; + 8'h86: tmp_new_sbox2 = 8'hdc; + 8'h87: tmp_new_sbox2 = 8'hea; + 8'h88: tmp_new_sbox2 = 8'h97; + 8'h89: tmp_new_sbox2 = 8'hf2; + 8'h8a: tmp_new_sbox2 = 8'hcf; + 8'h8b: tmp_new_sbox2 = 8'hce; + 8'h8c: tmp_new_sbox2 = 8'hf0; + 8'h8d: tmp_new_sbox2 = 8'hb4; + 8'h8e: tmp_new_sbox2 = 8'he6; + 8'h8f: tmp_new_sbox2 = 8'h73; + 8'h90: tmp_new_sbox2 = 8'h96; + 8'h91: tmp_new_sbox2 = 8'hac; + 8'h92: tmp_new_sbox2 = 8'h74; + 8'h93: tmp_new_sbox2 = 8'h22; + 8'h94: tmp_new_sbox2 = 8'he7; + 8'h95: tmp_new_sbox2 = 8'had; + 8'h96: tmp_new_sbox2 = 8'h35; + 8'h97: tmp_new_sbox2 = 8'h85; + 8'h98: tmp_new_sbox2 = 8'he2; + 8'h99: tmp_new_sbox2 = 8'hf9; + 8'h9a: tmp_new_sbox2 = 8'h37; + 8'h9b: tmp_new_sbox2 = 8'he8; + 8'h9c: tmp_new_sbox2 = 8'h1c; + 8'h9d: tmp_new_sbox2 = 8'h75; + 8'h9e: tmp_new_sbox2 = 8'hdf; + 8'h9f: tmp_new_sbox2 = 8'h6e; + 8'ha0: tmp_new_sbox2 = 8'h47; + 8'ha1: tmp_new_sbox2 = 8'hf1; + 8'ha2: tmp_new_sbox2 = 8'h1a; + 8'ha3: tmp_new_sbox2 = 8'h71; + 8'ha4: tmp_new_sbox2 = 8'h1d; + 8'ha5: tmp_new_sbox2 = 8'h29; + 8'ha6: tmp_new_sbox2 = 8'hc5; + 8'ha7: tmp_new_sbox2 = 8'h89; + 8'ha8: tmp_new_sbox2 = 8'h6f; + 8'ha9: tmp_new_sbox2 = 8'hb7; + 8'haa: tmp_new_sbox2 = 8'h62; + 8'hab: tmp_new_sbox2 = 8'h0e; + 8'hac: tmp_new_sbox2 = 8'haa; + 8'had: tmp_new_sbox2 = 8'h18; + 8'hae: tmp_new_sbox2 = 8'hbe; + 8'haf: tmp_new_sbox2 = 8'h1b; + 8'hb0: tmp_new_sbox2 = 8'hfc; + 8'hb1: tmp_new_sbox2 = 8'h56; + 8'hb2: tmp_new_sbox2 = 8'h3e; + 8'hb3: tmp_new_sbox2 = 8'h4b; + 8'hb4: tmp_new_sbox2 = 8'hc6; + 8'hb5: tmp_new_sbox2 = 8'hd2; + 8'hb6: tmp_new_sbox2 = 8'h79; + 8'hb7: tmp_new_sbox2 = 8'h20; + 8'hb8: tmp_new_sbox2 = 8'h9a; + 8'hb9: tmp_new_sbox2 = 8'hdb; + 8'hba: tmp_new_sbox2 = 8'hc0; + 8'hbb: tmp_new_sbox2 = 8'hfe; + 8'hbc: tmp_new_sbox2 = 8'h78; + 8'hbd: tmp_new_sbox2 = 8'hcd; + 8'hbe: tmp_new_sbox2 = 8'h5a; + 8'hbf: tmp_new_sbox2 = 8'hf4; + 8'hc0: tmp_new_sbox2 = 8'h1f; + 8'hc1: tmp_new_sbox2 = 8'hdd; + 8'hc2: tmp_new_sbox2 = 8'ha8; + 8'hc3: tmp_new_sbox2 = 8'h33; + 8'hc4: tmp_new_sbox2 = 8'h88; + 8'hc5: tmp_new_sbox2 = 8'h07; + 8'hc6: tmp_new_sbox2 = 8'hc7; + 8'hc7: tmp_new_sbox2 = 8'h31; + 8'hc8: tmp_new_sbox2 = 8'hb1; + 8'hc9: tmp_new_sbox2 = 8'h12; + 8'hca: tmp_new_sbox2 = 8'h10; + 8'hcb: tmp_new_sbox2 = 8'h59; + 8'hcc: tmp_new_sbox2 = 8'h27; + 8'hcd: tmp_new_sbox2 = 8'h80; + 8'hce: tmp_new_sbox2 = 8'hec; + 8'hcf: tmp_new_sbox2 = 8'h5f; + 8'hd0: tmp_new_sbox2 = 8'h60; + 8'hd1: tmp_new_sbox2 = 8'h51; + 8'hd2: tmp_new_sbox2 = 8'h7f; + 8'hd3: tmp_new_sbox2 = 8'ha9; + 8'hd4: tmp_new_sbox2 = 8'h19; + 8'hd5: tmp_new_sbox2 = 8'hb5; + 8'hd6: tmp_new_sbox2 = 8'h4a; + 8'hd7: tmp_new_sbox2 = 8'h0d; + 8'hd8: tmp_new_sbox2 = 8'h2d; + 8'hd9: tmp_new_sbox2 = 8'he5; + 8'hda: tmp_new_sbox2 = 8'h7a; + 8'hdb: tmp_new_sbox2 = 8'h9f; + 8'hdc: tmp_new_sbox2 = 8'h93; + 8'hdd: tmp_new_sbox2 = 8'hc9; + 8'hde: tmp_new_sbox2 = 8'h9c; + 8'hdf: tmp_new_sbox2 = 8'hef; + 8'he0: tmp_new_sbox2 = 8'ha0; + 8'he1: tmp_new_sbox2 = 8'he0; + 8'he2: tmp_new_sbox2 = 8'h3b; + 8'he3: tmp_new_sbox2 = 8'h4d; + 8'he4: tmp_new_sbox2 = 8'hae; + 8'he5: tmp_new_sbox2 = 8'h2a; + 8'he6: tmp_new_sbox2 = 8'hf5; + 8'he7: tmp_new_sbox2 = 8'hb0; + 8'he8: tmp_new_sbox2 = 8'hc8; + 8'he9: tmp_new_sbox2 = 8'heb; + 8'hea: tmp_new_sbox2 = 8'hbb; + 8'heb: tmp_new_sbox2 = 8'h3c; + 8'hec: tmp_new_sbox2 = 8'h83; + 8'hed: tmp_new_sbox2 = 8'h53; + 8'hee: tmp_new_sbox2 = 8'h99; + 8'hef: tmp_new_sbox2 = 8'h61; + 8'hf0: tmp_new_sbox2 = 8'h17; + 8'hf1: tmp_new_sbox2 = 8'h2b; + 8'hf2: tmp_new_sbox2 = 8'h04; + 8'hf3: tmp_new_sbox2 = 8'h7e; + 8'hf4: tmp_new_sbox2 = 8'hba; + 8'hf5: tmp_new_sbox2 = 8'h77; + 8'hf6: tmp_new_sbox2 = 8'hd6; + 8'hf7: tmp_new_sbox2 = 8'h26; + 8'hf8: tmp_new_sbox2 = 8'he1; + 8'hf9: tmp_new_sbox2 = 8'h69; + 8'hfa: tmp_new_sbox2 = 8'h14; + 8'hfb: tmp_new_sbox2 = 8'h63; + 8'hfc: tmp_new_sbox2 = 8'h55; + 8'hfd: tmp_new_sbox2 = 8'h21; + 8'hfe: tmp_new_sbox2 = 8'h0c; + 8'hff: tmp_new_sbox2 = 8'h7d; + endcase // case (sword) + end // inv_sbox_rom2 + + + //---------------------------------------------------------------- + // inv_sbox_rom3 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : inv_sbox_rom3 + case(sword[7 : 0]) + 8'h00: tmp_new_sbox3 = 8'h52; + 8'h01: tmp_new_sbox3 = 8'h09; + 8'h02: tmp_new_sbox3 = 8'h6a; + 8'h03: tmp_new_sbox3 = 8'hd5; + 8'h04: tmp_new_sbox3 = 8'h30; + 8'h05: tmp_new_sbox3 = 8'h36; + 8'h06: tmp_new_sbox3 = 8'ha5; + 8'h07: tmp_new_sbox3 = 8'h38; + 8'h08: tmp_new_sbox3 = 8'hbf; + 8'h09: tmp_new_sbox3 = 8'h40; + 8'h0a: tmp_new_sbox3 = 8'ha3; + 8'h0b: tmp_new_sbox3 = 8'h9e; + 8'h0c: tmp_new_sbox3 = 8'h81; + 8'h0d: tmp_new_sbox3 = 8'hf3; + 8'h0e: tmp_new_sbox3 = 8'hd7; + 8'h0f: tmp_new_sbox3 = 8'hfb; + 8'h10: tmp_new_sbox3 = 8'h7c; + 8'h11: tmp_new_sbox3 = 8'he3; + 8'h12: tmp_new_sbox3 = 8'h39; + 8'h13: tmp_new_sbox3 = 8'h82; + 8'h14: tmp_new_sbox3 = 8'h9b; + 8'h15: tmp_new_sbox3 = 8'h2f; + 8'h16: tmp_new_sbox3 = 8'hff; + 8'h17: tmp_new_sbox3 = 8'h87; + 8'h18: tmp_new_sbox3 = 8'h34; + 8'h19: tmp_new_sbox3 = 8'h8e; + 8'h1a: tmp_new_sbox3 = 8'h43; + 8'h1b: tmp_new_sbox3 = 8'h44; + 8'h1c: tmp_new_sbox3 = 8'hc4; + 8'h1d: tmp_new_sbox3 = 8'hde; + 8'h1e: tmp_new_sbox3 = 8'he9; + 8'h1f: tmp_new_sbox3 = 8'hcb; + 8'h20: tmp_new_sbox3 = 8'h54; + 8'h21: tmp_new_sbox3 = 8'h7b; + 8'h22: tmp_new_sbox3 = 8'h94; + 8'h23: tmp_new_sbox3 = 8'h32; + 8'h24: tmp_new_sbox3 = 8'ha6; + 8'h25: tmp_new_sbox3 = 8'hc2; + 8'h26: tmp_new_sbox3 = 8'h23; + 8'h27: tmp_new_sbox3 = 8'h3d; + 8'h28: tmp_new_sbox3 = 8'hee; + 8'h29: tmp_new_sbox3 = 8'h4c; + 8'h2a: tmp_new_sbox3 = 8'h95; + 8'h2b: tmp_new_sbox3 = 8'h0b; + 8'h2c: tmp_new_sbox3 = 8'h42; + 8'h2d: tmp_new_sbox3 = 8'hfa; + 8'h2e: tmp_new_sbox3 = 8'hc3; + 8'h2f: tmp_new_sbox3 = 8'h4e; + 8'h30: tmp_new_sbox3 = 8'h08; + 8'h31: tmp_new_sbox3 = 8'h2e; + 8'h32: tmp_new_sbox3 = 8'ha1; + 8'h33: tmp_new_sbox3 = 8'h66; + 8'h34: tmp_new_sbox3 = 8'h28; + 8'h35: tmp_new_sbox3 = 8'hd9; + 8'h36: tmp_new_sbox3 = 8'h24; + 8'h37: tmp_new_sbox3 = 8'hb2; + 8'h38: tmp_new_sbox3 = 8'h76; + 8'h39: tmp_new_sbox3 = 8'h5b; + 8'h3a: tmp_new_sbox3 = 8'ha2; + 8'h3b: tmp_new_sbox3 = 8'h49; + 8'h3c: tmp_new_sbox3 = 8'h6d; + 8'h3d: tmp_new_sbox3 = 8'h8b; + 8'h3e: tmp_new_sbox3 = 8'hd1; + 8'h3f: tmp_new_sbox3 = 8'h25; + 8'h40: tmp_new_sbox3 = 8'h72; + 8'h41: tmp_new_sbox3 = 8'hf8; + 8'h42: tmp_new_sbox3 = 8'hf6; + 8'h43: tmp_new_sbox3 = 8'h64; + 8'h44: tmp_new_sbox3 = 8'h86; + 8'h45: tmp_new_sbox3 = 8'h68; + 8'h46: tmp_new_sbox3 = 8'h98; + 8'h47: tmp_new_sbox3 = 8'h16; + 8'h48: tmp_new_sbox3 = 8'hd4; + 8'h49: tmp_new_sbox3 = 8'ha4; + 8'h4a: tmp_new_sbox3 = 8'h5c; + 8'h4b: tmp_new_sbox3 = 8'hcc; + 8'h4c: tmp_new_sbox3 = 8'h5d; + 8'h4d: tmp_new_sbox3 = 8'h65; + 8'h4e: tmp_new_sbox3 = 8'hb6; + 8'h4f: tmp_new_sbox3 = 8'h92; + 8'h50: tmp_new_sbox3 = 8'h6c; + 8'h51: tmp_new_sbox3 = 8'h70; + 8'h52: tmp_new_sbox3 = 8'h48; + 8'h53: tmp_new_sbox3 = 8'h50; + 8'h54: tmp_new_sbox3 = 8'hfd; + 8'h55: tmp_new_sbox3 = 8'hed; + 8'h56: tmp_new_sbox3 = 8'hb9; + 8'h57: tmp_new_sbox3 = 8'hda; + 8'h58: tmp_new_sbox3 = 8'h5e; + 8'h59: tmp_new_sbox3 = 8'h15; + 8'h5a: tmp_new_sbox3 = 8'h46; + 8'h5b: tmp_new_sbox3 = 8'h57; + 8'h5c: tmp_new_sbox3 = 8'ha7; + 8'h5d: tmp_new_sbox3 = 8'h8d; + 8'h5e: tmp_new_sbox3 = 8'h9d; + 8'h5f: tmp_new_sbox3 = 8'h84; + 8'h60: tmp_new_sbox3 = 8'h90; + 8'h61: tmp_new_sbox3 = 8'hd8; + 8'h62: tmp_new_sbox3 = 8'hab; + 8'h63: tmp_new_sbox3 = 8'h00; + 8'h64: tmp_new_sbox3 = 8'h8c; + 8'h65: tmp_new_sbox3 = 8'hbc; + 8'h66: tmp_new_sbox3 = 8'hd3; + 8'h67: tmp_new_sbox3 = 8'h0a; + 8'h68: tmp_new_sbox3 = 8'hf7; + 8'h69: tmp_new_sbox3 = 8'he4; + 8'h6a: tmp_new_sbox3 = 8'h58; + 8'h6b: tmp_new_sbox3 = 8'h05; + 8'h6c: tmp_new_sbox3 = 8'hb8; + 8'h6d: tmp_new_sbox3 = 8'hb3; + 8'h6e: tmp_new_sbox3 = 8'h45; + 8'h6f: tmp_new_sbox3 = 8'h06; + 8'h70: tmp_new_sbox3 = 8'hd0; + 8'h71: tmp_new_sbox3 = 8'h2c; + 8'h72: tmp_new_sbox3 = 8'h1e; + 8'h73: tmp_new_sbox3 = 8'h8f; + 8'h74: tmp_new_sbox3 = 8'hca; + 8'h75: tmp_new_sbox3 = 8'h3f; + 8'h76: tmp_new_sbox3 = 8'h0f; + 8'h77: tmp_new_sbox3 = 8'h02; + 8'h78: tmp_new_sbox3 = 8'hc1; + 8'h79: tmp_new_sbox3 = 8'haf; + 8'h7a: tmp_new_sbox3 = 8'hbd; + 8'h7b: tmp_new_sbox3 = 8'h03; + 8'h7c: tmp_new_sbox3 = 8'h01; + 8'h7d: tmp_new_sbox3 = 8'h13; + 8'h7e: tmp_new_sbox3 = 8'h8a; + 8'h7f: tmp_new_sbox3 = 8'h6b; + 8'h80: tmp_new_sbox3 = 8'h3a; + 8'h81: tmp_new_sbox3 = 8'h91; + 8'h82: tmp_new_sbox3 = 8'h11; + 8'h83: tmp_new_sbox3 = 8'h41; + 8'h84: tmp_new_sbox3 = 8'h4f; + 8'h85: tmp_new_sbox3 = 8'h67; + 8'h86: tmp_new_sbox3 = 8'hdc; + 8'h87: tmp_new_sbox3 = 8'hea; + 8'h88: tmp_new_sbox3 = 8'h97; + 8'h89: tmp_new_sbox3 = 8'hf2; + 8'h8a: tmp_new_sbox3 = 8'hcf; + 8'h8b: tmp_new_sbox3 = 8'hce; + 8'h8c: tmp_new_sbox3 = 8'hf0; + 8'h8d: tmp_new_sbox3 = 8'hb4; + 8'h8e: tmp_new_sbox3 = 8'he6; + 8'h8f: tmp_new_sbox3 = 8'h73; + 8'h90: tmp_new_sbox3 = 8'h96; + 8'h91: tmp_new_sbox3 = 8'hac; + 8'h92: tmp_new_sbox3 = 8'h74; + 8'h93: tmp_new_sbox3 = 8'h22; + 8'h94: tmp_new_sbox3 = 8'he7; + 8'h95: tmp_new_sbox3 = 8'had; + 8'h96: tmp_new_sbox3 = 8'h35; + 8'h97: tmp_new_sbox3 = 8'h85; + 8'h98: tmp_new_sbox3 = 8'he2; + 8'h99: tmp_new_sbox3 = 8'hf9; + 8'h9a: tmp_new_sbox3 = 8'h37; + 8'h9b: tmp_new_sbox3 = 8'he8; + 8'h9c: tmp_new_sbox3 = 8'h1c; + 8'h9d: tmp_new_sbox3 = 8'h75; + 8'h9e: tmp_new_sbox3 = 8'hdf; + 8'h9f: tmp_new_sbox3 = 8'h6e; + 8'ha0: tmp_new_sbox3 = 8'h47; + 8'ha1: tmp_new_sbox3 = 8'hf1; + 8'ha2: tmp_new_sbox3 = 8'h1a; + 8'ha3: tmp_new_sbox3 = 8'h71; + 8'ha4: tmp_new_sbox3 = 8'h1d; + 8'ha5: tmp_new_sbox3 = 8'h29; + 8'ha6: tmp_new_sbox3 = 8'hc5; + 8'ha7: tmp_new_sbox3 = 8'h89; + 8'ha8: tmp_new_sbox3 = 8'h6f; + 8'ha9: tmp_new_sbox3 = 8'hb7; + 8'haa: tmp_new_sbox3 = 8'h62; + 8'hab: tmp_new_sbox3 = 8'h0e; + 8'hac: tmp_new_sbox3 = 8'haa; + 8'had: tmp_new_sbox3 = 8'h18; + 8'hae: tmp_new_sbox3 = 8'hbe; + 8'haf: tmp_new_sbox3 = 8'h1b; + 8'hb0: tmp_new_sbox3 = 8'hfc; + 8'hb1: tmp_new_sbox3 = 8'h56; + 8'hb2: tmp_new_sbox3 = 8'h3e; + 8'hb3: tmp_new_sbox3 = 8'h4b; + 8'hb4: tmp_new_sbox3 = 8'hc6; + 8'hb5: tmp_new_sbox3 = 8'hd2; + 8'hb6: tmp_new_sbox3 = 8'h79; + 8'hb7: tmp_new_sbox3 = 8'h20; + 8'hb8: tmp_new_sbox3 = 8'h9a; + 8'hb9: tmp_new_sbox3 = 8'hdb; + 8'hba: tmp_new_sbox3 = 8'hc0; + 8'hbb: tmp_new_sbox3 = 8'hfe; + 8'hbc: tmp_new_sbox3 = 8'h78; + 8'hbd: tmp_new_sbox3 = 8'hcd; + 8'hbe: tmp_new_sbox3 = 8'h5a; + 8'hbf: tmp_new_sbox3 = 8'hf4; + 8'hc0: tmp_new_sbox3 = 8'h1f; + 8'hc1: tmp_new_sbox3 = 8'hdd; + 8'hc2: tmp_new_sbox3 = 8'ha8; + 8'hc3: tmp_new_sbox3 = 8'h33; + 8'hc4: tmp_new_sbox3 = 8'h88; + 8'hc5: tmp_new_sbox3 = 8'h07; + 8'hc6: tmp_new_sbox3 = 8'hc7; + 8'hc7: tmp_new_sbox3 = 8'h31; + 8'hc8: tmp_new_sbox3 = 8'hb1; + 8'hc9: tmp_new_sbox3 = 8'h12; + 8'hca: tmp_new_sbox3 = 8'h10; + 8'hcb: tmp_new_sbox3 = 8'h59; + 8'hcc: tmp_new_sbox3 = 8'h27; + 8'hcd: tmp_new_sbox3 = 8'h80; + 8'hce: tmp_new_sbox3 = 8'hec; + 8'hcf: tmp_new_sbox3 = 8'h5f; + 8'hd0: tmp_new_sbox3 = 8'h60; + 8'hd1: tmp_new_sbox3 = 8'h51; + 8'hd2: tmp_new_sbox3 = 8'h7f; + 8'hd3: tmp_new_sbox3 = 8'ha9; + 8'hd4: tmp_new_sbox3 = 8'h19; + 8'hd5: tmp_new_sbox3 = 8'hb5; + 8'hd6: tmp_new_sbox3 = 8'h4a; + 8'hd7: tmp_new_sbox3 = 8'h0d; + 8'hd8: tmp_new_sbox3 = 8'h2d; + 8'hd9: tmp_new_sbox3 = 8'he5; + 8'hda: tmp_new_sbox3 = 8'h7a; + 8'hdb: tmp_new_sbox3 = 8'h9f; + 8'hdc: tmp_new_sbox3 = 8'h93; + 8'hdd: tmp_new_sbox3 = 8'hc9; + 8'hde: tmp_new_sbox3 = 8'h9c; + 8'hdf: tmp_new_sbox3 = 8'hef; + 8'he0: tmp_new_sbox3 = 8'ha0; + 8'he1: tmp_new_sbox3 = 8'he0; + 8'he2: tmp_new_sbox3 = 8'h3b; + 8'he3: tmp_new_sbox3 = 8'h4d; + 8'he4: tmp_new_sbox3 = 8'hae; + 8'he5: tmp_new_sbox3 = 8'h2a; + 8'he6: tmp_new_sbox3 = 8'hf5; + 8'he7: tmp_new_sbox3 = 8'hb0; + 8'he8: tmp_new_sbox3 = 8'hc8; + 8'he9: tmp_new_sbox3 = 8'heb; + 8'hea: tmp_new_sbox3 = 8'hbb; + 8'heb: tmp_new_sbox3 = 8'h3c; + 8'hec: tmp_new_sbox3 = 8'h83; + 8'hed: tmp_new_sbox3 = 8'h53; + 8'hee: tmp_new_sbox3 = 8'h99; + 8'hef: tmp_new_sbox3 = 8'h61; + 8'hf0: tmp_new_sbox3 = 8'h17; + 8'hf1: tmp_new_sbox3 = 8'h2b; + 8'hf2: tmp_new_sbox3 = 8'h04; + 8'hf3: tmp_new_sbox3 = 8'h7e; + 8'hf4: tmp_new_sbox3 = 8'hba; + 8'hf5: tmp_new_sbox3 = 8'h77; + 8'hf6: tmp_new_sbox3 = 8'hd6; + 8'hf7: tmp_new_sbox3 = 8'h26; + 8'hf8: tmp_new_sbox3 = 8'he1; + 8'hf9: tmp_new_sbox3 = 8'h69; + 8'hfa: tmp_new_sbox3 = 8'h14; + 8'hfb: tmp_new_sbox3 = 8'h63; + 8'hfc: tmp_new_sbox3 = 8'h55; + 8'hfd: tmp_new_sbox3 = 8'h21; + 8'hfe: tmp_new_sbox3 = 8'h0c; + 8'hff: tmp_new_sbox3 = 8'h7d; + endcase // case (sword) + end // inv_sbox_rom3 + +endmodule // aes_inv_sbox + +//====================================================================== +// EOF aes_inv_sbox.v +//====================================================================== diff --git a/src/rtl/aes_key_mem.v b/src/rtl/aes_key_mem.v new file mode 100644 index 0000000..e681c93 --- /dev/null +++ b/src/rtl/aes_key_mem.v @@ -0,0 +1,479 @@ +//====================================================================== +// +// aes_key_mem.v +// ------------- +// The AES key memort including round key generator. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes_key_mem( + input wire clk, + input wire reset_n, + + input wire [255 : 0] key, + input wire keylen, + input wire init, + + input wire [3 : 0] round, + output wire [127 : 0] round_key, + output wire ready, + + + output wire [31 : 0] sboxw, + input wire [31 : 0] new_sboxw + ); + + + //---------------------------------------------------------------- + // Parameters. + //---------------------------------------------------------------- + parameter AES_128_BIT_KEY = 1'h0; + parameter AES_256_BIT_KEY = 1'h1; + + parameter AES_128_NUM_ROUNDS = 4'ha; + parameter AES_256_NUM_ROUNDS = 4'he; + + parameter CTRL_IDLE = 3'h0; + parameter CTRL_INIT = 3'h1; + parameter CTRL_GENERATE = 3'h2; + parameter CTRL_DONE = 3'h3; + + + //---------------------------------------------------------------- + // Registers. + //---------------------------------------------------------------- + reg [127 : 0] key_mem [0 : 14]; + reg [127 : 0] key_mem_new; + reg key_mem_we; + + reg [127 : 0] prev_key0_reg; + reg [127 : 0] prev_key0_new; + reg prev_key0_we; + + reg [127 : 0] prev_key1_reg; + reg [127 : 0] prev_key1_new; + reg prev_key1_we; + + reg [3 : 0] round_ctr_reg; + reg [3 : 0] round_ctr_new; + reg round_ctr_rst; + reg round_ctr_inc; + reg round_ctr_we; + + reg [2 : 0] key_mem_ctrl_reg; + reg [2 : 0] key_mem_ctrl_new; + reg key_mem_ctrl_we; + + reg ready_reg; + reg ready_new; + reg ready_we; + + reg [7 : 0] rcon_reg; + reg [7 : 0] rcon_new; + reg rcon_we; + reg rcon_set; + reg rcon_next; + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg [31 : 0] tmp_sboxw; + + reg round_key_update; + reg [3 : 0] num_rounds; + + reg [127 : 0] tmp_round_key; + + + //---------------------------------------------------------------- + // Concurrent assignments for ports. + //---------------------------------------------------------------- + assign round_key = tmp_round_key; + assign ready = ready_reg; + assign sboxw = tmp_sboxw; + + + //---------------------------------------------------------------- + // reg_update + // + // Update functionality for all registers in the core. + // All registers are positive edge triggered with asynchronous + // active low reset. All registers have write enable. + //---------------------------------------------------------------- + always @ (posedge clk or negedge reset_n) + begin: reg_update + if (!reset_n) + begin + key_mem [0] <= 128'h00000000000000000000000000000000; + key_mem [1] <= 128'h00000000000000000000000000000000; + key_mem [2] <= 128'h00000000000000000000000000000000; + key_mem [3] <= 128'h00000000000000000000000000000000; + key_mem [4] <= 128'h00000000000000000000000000000000; + key_mem [5] <= 128'h00000000000000000000000000000000; + key_mem [6] <= 128'h00000000000000000000000000000000; + key_mem [7] <= 128'h00000000000000000000000000000000; + key_mem [8] <= 128'h00000000000000000000000000000000; + key_mem [9] <= 128'h00000000000000000000000000000000; + key_mem [10] <= 128'h00000000000000000000000000000000; + key_mem [11] <= 128'h00000000000000000000000000000000; + key_mem [12] <= 128'h00000000000000000000000000000000; + key_mem [13] <= 128'h00000000000000000000000000000000; + key_mem [14] <= 128'h00000000000000000000000000000000; + prev_key0_reg <= 128'h00000000000000000000000000000000; + prev_key1_reg <= 128'h00000000000000000000000000000000; + rcon_reg <= 8'h00; + ready_reg <= 0; + round_ctr_reg <= 4'h0; + key_mem_ctrl_reg <= CTRL_IDLE; + end + else + begin + if (round_ctr_we) + begin + round_ctr_reg <= round_ctr_new; + end + + if (ready_we) + begin + ready_reg <= ready_new; + end + + if (rcon_we) + begin + rcon_reg <= rcon_new; + end + + if (key_mem_we) + begin + key_mem[round_ctr_reg] <= key_mem_new; + end + + if (prev_key0_we) + begin + prev_key0_reg <= prev_key0_new; + end + + if (prev_key1_we) + begin + prev_key1_reg <= prev_key1_new; + end + + if (key_mem_ctrl_we) + begin + key_mem_ctrl_reg <= key_mem_ctrl_new; + end + end + end // reg_update + + + //---------------------------------------------------------------- + // key_mem_read + // + // Combinational read port for the key memory. + //---------------------------------------------------------------- + always @* + begin : key_mem_read + tmp_round_key = key_mem[round]; + end // key_mem_read + + + //---------------------------------------------------------------- + // round_key_gen + // + // The round key generator logic for AES-128 and AES-256. + //---------------------------------------------------------------- + always @* + begin: round_key_gen + reg [31 : 0] w0, w1, w2, w3, w4, w5, w6, w7; + reg [31 : 0] k0, k1, k2, k3; + reg [31 : 0] rconw, rotstw, tw, trw; + + // Default assignments. + key_mem_new = 128'h00000000000000000000000000000000; + key_mem_we = 0; + prev_key0_new = 128'h00000000000000000000000000000000; + prev_key0_we = 0; + prev_key1_new = 128'h00000000000000000000000000000000; + prev_key1_we = 0; + + k0 = 32'h00000000; + k1 = 32'h00000000; + k2 = 32'h00000000; + k3 = 32'h00000000; + + rcon_set = 1; + rcon_next = 0; + + // Extract words and calculate intermediate values. + // Perform rotation of sbox word etc. + w0 = prev_key0_reg[127 : 096]; + w1 = prev_key0_reg[095 : 064]; + w2 = prev_key0_reg[063 : 032]; + w3 = prev_key0_reg[031 : 000]; + + w4 = prev_key1_reg[127 : 096]; + w5 = prev_key1_reg[095 : 064]; + w6 = prev_key1_reg[063 : 032]; + w7 = prev_key1_reg[031 : 000]; + + rconw = {rcon_reg, 24'h000000}; + tmp_sboxw = w7; + rotstw = {new_sboxw[23 : 00], new_sboxw[31 : 24]}; + trw = rotstw ^ rconw; + tw = new_sboxw; + + // Generate the specific round keys. + if (round_key_update) + begin + rcon_set = 0; + key_mem_we = 1; + case (keylen) + AES_128_BIT_KEY: + begin + if (round_ctr_reg == 0) + begin + key_mem_new = key[255 : 128]; + prev_key1_new = key[255 : 128]; + prev_key1_we = 1; + rcon_next = 1; + end + else + begin + k0 = w4 ^ trw; + k1 = w5 ^ w4 ^ trw; + k2 = w6 ^ w5 ^ w4 ^ trw; + k3 = w7 ^ w6 ^ w5 ^ w4 ^ trw; + + key_mem_new = {k0, k1, k2, k3}; + prev_key1_new = {k0, k1, k2, k3}; + prev_key1_we = 1; + rcon_next = 1; + end + end + + AES_256_BIT_KEY: + begin + if (round_ctr_reg == 0) + begin + key_mem_new = key[255 : 128]; + prev_key0_new = key[255 : 128]; + prev_key0_we = 1; + end + else if (round_ctr_reg == 1) + begin + key_mem_new = key[127 : 0]; + prev_key1_new = key[127 : 0]; + prev_key1_we = 1; + rcon_next = 1; + end + else + begin + if (round_ctr_reg[0] == 0) + begin + k0 = w0 ^ trw; + k1 = w1 ^ w0 ^ trw; + k2 = w2 ^ w1 ^ w0 ^ trw; + k3 = w3 ^ w2 ^ w1 ^ w0 ^ trw; + end + else + begin + k0 = w0 ^ tw; + k1 = w1 ^ w0 ^ tw; + k2 = w2 ^ w1 ^ w0 ^ tw; + k3 = w3 ^ w2 ^ w1 ^ w0 ^ tw; + rcon_next = 1; + end + + // Store the generated round keys. + key_mem_new = {k0, k1, k2, k3}; + prev_key1_new = {k0, k1, k2, k3}; + prev_key1_we = 1; + prev_key0_new = prev_key1_reg; + prev_key0_we = 1; + end + end + + default: + begin + end + endcase // case (keylen) + end + end // round_key_gen + + + //---------------------------------------------------------------- + // rcon_logic + // + // Caclulates the rcon value for the different key expansion + // iterations. + //---------------------------------------------------------------- + always @* + begin : rcon_logic + reg [7 : 0] tmp_rcon; + rcon_new = 8'h00; + rcon_we = 0; + + tmp_rcon = {rcon_reg[6 : 0], 1'b0} ^ (8'h1b & {8{rcon_reg[7]}}); + + if (rcon_set) + begin + rcon_new = 8'h8d; + rcon_we = 1; + end + + if (rcon_next) + begin + rcon_new = tmp_rcon[7 : 0]; + rcon_we = 1; + end + end + + + //---------------------------------------------------------------- + // round_ctr + // + // The round counter logic with increase and reset. + //---------------------------------------------------------------- + always @* + begin : round_ctr + round_ctr_new = 4'h0; + round_ctr_we = 0; + + if (round_ctr_rst) + begin + round_ctr_new = 4'h0; + round_ctr_we = 1; + end + + else if (round_ctr_inc) + begin + round_ctr_new = round_ctr_reg + 1'b1; + round_ctr_we = 1; + end + end + + + //---------------------------------------------------------------- + // num_rounds_logic + // + // Logic to select the number of rounds to generate keys for + //---------------------------------------------------------------- + always @* + begin : num_rounds_logic + num_rounds = 4'h0; + + case (keylen) + AES_128_BIT_KEY: + begin + num_rounds = AES_128_NUM_ROUNDS; + end + + AES_256_BIT_KEY: + begin + num_rounds = AES_256_NUM_ROUNDS; + end + + default: + begin + end + endcase // case (keylen) + end + + + //---------------------------------------------------------------- + // key_mem_ctrl + // + // + // The FSM that controls the round key generation. + //---------------------------------------------------------------- + always @* + begin: key_mem_ctrl + // Default assignments. + ready_new = 0; + ready_we = 0; + round_key_update = 0; + round_ctr_rst = 0; + round_ctr_inc = 0; + key_mem_ctrl_new = CTRL_IDLE; + key_mem_ctrl_we = 0; + + case(key_mem_ctrl_reg) + CTRL_IDLE: + begin + if (init) + begin + ready_new = 0; + ready_we = 1; + key_mem_ctrl_new = CTRL_INIT; + key_mem_ctrl_we = 1; + end + end + + CTRL_INIT: + begin + round_ctr_rst = 1; + key_mem_ctrl_new = CTRL_GENERATE; + key_mem_ctrl_we = 1; + end + + CTRL_GENERATE: + begin + round_ctr_inc = 1; + round_key_update = 1; + if (round_ctr_reg == num_rounds) + begin + key_mem_ctrl_new = CTRL_DONE; + key_mem_ctrl_we = 1; + end + end + + CTRL_DONE: + begin + ready_new = 1; + ready_we = 1; + key_mem_ctrl_new = CTRL_IDLE; + key_mem_ctrl_we = 1; + end + + default: + begin + end + endcase // case (key_mem_ctrl_reg) + + end // key_mem_ctrl +endmodule // aes_key_mem + +//====================================================================== +// EOF aes_key_mem.v +//====================================================================== diff --git a/src/rtl/aes_sbox.v b/src/rtl/aes_sbox.v new file mode 100644 index 0000000..2232ea8 --- /dev/null +++ b/src/rtl/aes_sbox.v @@ -0,0 +1,1137 @@ +//====================================================================== +// +// aes_sbox.v +// ---------- +// The AES S-box. Basically a 256 Byte ROM. This implementation +// contains four parallel S-boxes to handle a 32 bit word. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, SUNET +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or +// without modification, are permitted provided that the following +// conditions are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF +// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +module aes_sbox( + input wire [31 : 0] sboxw, + output wire [31 : 0] new_sboxw + ); + + + //---------------------------------------------------------------- + // Wires. + //---------------------------------------------------------------- + reg [7 : 0] tmp_new_sbox0; + reg [7 : 0] tmp_new_sbox1; + reg [7 : 0] tmp_new_sbox2; + reg [7 : 0] tmp_new_sbox3; + + + //---------------------------------------------------------------- + // Concurrent assignments for ports. + //---------------------------------------------------------------- + assign new_sboxw = {tmp_new_sbox0, tmp_new_sbox1, + tmp_new_sbox2, tmp_new_sbox3}; + + + //---------------------------------------------------------------- + // sbox_rom0 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : sbox_rom0 + case(sboxw[31 : 24]) + 8'h00: tmp_new_sbox0 = 8'h63; + 8'h01: tmp_new_sbox0 = 8'h7c; + 8'h02: tmp_new_sbox0 = 8'h77; + 8'h03: tmp_new_sbox0 = 8'h7b; + 8'h04: tmp_new_sbox0 = 8'hf2; + 8'h05: tmp_new_sbox0 = 8'h6b; + 8'h06: tmp_new_sbox0 = 8'h6f; + 8'h07: tmp_new_sbox0 = 8'hc5; + 8'h08: tmp_new_sbox0 = 8'h30; + 8'h09: tmp_new_sbox0 = 8'h01; + 8'h0a: tmp_new_sbox0 = 8'h67; + 8'h0b: tmp_new_sbox0 = 8'h2b; + 8'h0c: tmp_new_sbox0 = 8'hfe; + 8'h0d: tmp_new_sbox0 = 8'hd7; + 8'h0e: tmp_new_sbox0 = 8'hab; + 8'h0f: tmp_new_sbox0 = 8'h76; + 8'h10: tmp_new_sbox0 = 8'hca; + 8'h11: tmp_new_sbox0 = 8'h82; + 8'h12: tmp_new_sbox0 = 8'hc9; + 8'h13: tmp_new_sbox0 = 8'h7d; + 8'h14: tmp_new_sbox0 = 8'hfa; + 8'h15: tmp_new_sbox0 = 8'h59; + 8'h16: tmp_new_sbox0 = 8'h47; + 8'h17: tmp_new_sbox0 = 8'hf0; + 8'h18: tmp_new_sbox0 = 8'had; + 8'h19: tmp_new_sbox0 = 8'hd4; + 8'h1a: tmp_new_sbox0 = 8'ha2; + 8'h1b: tmp_new_sbox0 = 8'haf; + 8'h1c: tmp_new_sbox0 = 8'h9c; + 8'h1d: tmp_new_sbox0 = 8'ha4; + 8'h1e: tmp_new_sbox0 = 8'h72; + 8'h1f: tmp_new_sbox0 = 8'hc0; + 8'h20: tmp_new_sbox0 = 8'hb7; + 8'h21: tmp_new_sbox0 = 8'hfd; + 8'h22: tmp_new_sbox0 = 8'h93; + 8'h23: tmp_new_sbox0 = 8'h26; + 8'h24: tmp_new_sbox0 = 8'h36; + 8'h25: tmp_new_sbox0 = 8'h3f; + 8'h26: tmp_new_sbox0 = 8'hf7; + 8'h27: tmp_new_sbox0 = 8'hcc; + 8'h28: tmp_new_sbox0 = 8'h34; + 8'h29: tmp_new_sbox0 = 8'ha5; + 8'h2a: tmp_new_sbox0 = 8'he5; + 8'h2b: tmp_new_sbox0 = 8'hf1; + 8'h2c: tmp_new_sbox0 = 8'h71; + 8'h2d: tmp_new_sbox0 = 8'hd8; + 8'h2e: tmp_new_sbox0 = 8'h31; + 8'h2f: tmp_new_sbox0 = 8'h15; + 8'h30: tmp_new_sbox0 = 8'h04; + 8'h31: tmp_new_sbox0 = 8'hc7; + 8'h32: tmp_new_sbox0 = 8'h23; + 8'h33: tmp_new_sbox0 = 8'hc3; + 8'h34: tmp_new_sbox0 = 8'h18; + 8'h35: tmp_new_sbox0 = 8'h96; + 8'h36: tmp_new_sbox0 = 8'h05; + 8'h37: tmp_new_sbox0 = 8'h9a; + 8'h38: tmp_new_sbox0 = 8'h07; + 8'h39: tmp_new_sbox0 = 8'h12; + 8'h3a: tmp_new_sbox0 = 8'h80; + 8'h3b: tmp_new_sbox0 = 8'he2; + 8'h3c: tmp_new_sbox0 = 8'heb; + 8'h3d: tmp_new_sbox0 = 8'h27; + 8'h3e: tmp_new_sbox0 = 8'hb2; + 8'h3f: tmp_new_sbox0 = 8'h75; + 8'h40: tmp_new_sbox0 = 8'h09; + 8'h41: tmp_new_sbox0 = 8'h83; + 8'h42: tmp_new_sbox0 = 8'h2c; + 8'h43: tmp_new_sbox0 = 8'h1a; + 8'h44: tmp_new_sbox0 = 8'h1b; + 8'h45: tmp_new_sbox0 = 8'h6e; + 8'h46: tmp_new_sbox0 = 8'h5a; + 8'h47: tmp_new_sbox0 = 8'ha0; + 8'h48: tmp_new_sbox0 = 8'h52; + 8'h49: tmp_new_sbox0 = 8'h3b; + 8'h4a: tmp_new_sbox0 = 8'hd6; + 8'h4b: tmp_new_sbox0 = 8'hb3; + 8'h4c: tmp_new_sbox0 = 8'h29; + 8'h4d: tmp_new_sbox0 = 8'he3; + 8'h4e: tmp_new_sbox0 = 8'h2f; + 8'h4f: tmp_new_sbox0 = 8'h84; + 8'h50: tmp_new_sbox0 = 8'h53; + 8'h51: tmp_new_sbox0 = 8'hd1; + 8'h52: tmp_new_sbox0 = 8'h00; + 8'h53: tmp_new_sbox0 = 8'hed; + 8'h54: tmp_new_sbox0 = 8'h20; + 8'h55: tmp_new_sbox0 = 8'hfc; + 8'h56: tmp_new_sbox0 = 8'hb1; + 8'h57: tmp_new_sbox0 = 8'h5b; + 8'h58: tmp_new_sbox0 = 8'h6a; + 8'h59: tmp_new_sbox0 = 8'hcb; + 8'h5a: tmp_new_sbox0 = 8'hbe; + 8'h5b: tmp_new_sbox0 = 8'h39; + 8'h5c: tmp_new_sbox0 = 8'h4a; + 8'h5d: tmp_new_sbox0 = 8'h4c; + 8'h5e: tmp_new_sbox0 = 8'h58; + 8'h5f: tmp_new_sbox0 = 8'hcf; + 8'h60: tmp_new_sbox0 = 8'hd0; + 8'h61: tmp_new_sbox0 = 8'hef; + 8'h62: tmp_new_sbox0 = 8'haa; + 8'h63: tmp_new_sbox0 = 8'hfb; + 8'h64: tmp_new_sbox0 = 8'h43; + 8'h65: tmp_new_sbox0 = 8'h4d; + 8'h66: tmp_new_sbox0 = 8'h33; + 8'h67: tmp_new_sbox0 = 8'h85; + 8'h68: tmp_new_sbox0 = 8'h45; + 8'h69: tmp_new_sbox0 = 8'hf9; + 8'h6a: tmp_new_sbox0 = 8'h02; + 8'h6b: tmp_new_sbox0 = 8'h7f; + 8'h6c: tmp_new_sbox0 = 8'h50; + 8'h6d: tmp_new_sbox0 = 8'h3c; + 8'h6e: tmp_new_sbox0 = 8'h9f; + 8'h6f: tmp_new_sbox0 = 8'ha8; + 8'h70: tmp_new_sbox0 = 8'h51; + 8'h71: tmp_new_sbox0 = 8'ha3; + 8'h72: tmp_new_sbox0 = 8'h40; + 8'h73: tmp_new_sbox0 = 8'h8f; + 8'h74: tmp_new_sbox0 = 8'h92; + 8'h75: tmp_new_sbox0 = 8'h9d; + 8'h76: tmp_new_sbox0 = 8'h38; + 8'h77: tmp_new_sbox0 = 8'hf5; + 8'h78: tmp_new_sbox0 = 8'hbc; + 8'h79: tmp_new_sbox0 = 8'hb6; + 8'h7a: tmp_new_sbox0 = 8'hda; + 8'h7b: tmp_new_sbox0 = 8'h21; + 8'h7c: tmp_new_sbox0 = 8'h10; + 8'h7d: tmp_new_sbox0 = 8'hff; + 8'h7e: tmp_new_sbox0 = 8'hf3; + 8'h7f: tmp_new_sbox0 = 8'hd2; + 8'h80: tmp_new_sbox0 = 8'hcd; + 8'h81: tmp_new_sbox0 = 8'h0c; + 8'h82: tmp_new_sbox0 = 8'h13; + 8'h83: tmp_new_sbox0 = 8'hec; + 8'h84: tmp_new_sbox0 = 8'h5f; + 8'h85: tmp_new_sbox0 = 8'h97; + 8'h86: tmp_new_sbox0 = 8'h44; + 8'h87: tmp_new_sbox0 = 8'h17; + 8'h88: tmp_new_sbox0 = 8'hc4; + 8'h89: tmp_new_sbox0 = 8'ha7; + 8'h8a: tmp_new_sbox0 = 8'h7e; + 8'h8b: tmp_new_sbox0 = 8'h3d; + 8'h8c: tmp_new_sbox0 = 8'h64; + 8'h8d: tmp_new_sbox0 = 8'h5d; + 8'h8e: tmp_new_sbox0 = 8'h19; + 8'h8f: tmp_new_sbox0 = 8'h73; + 8'h90: tmp_new_sbox0 = 8'h60; + 8'h91: tmp_new_sbox0 = 8'h81; + 8'h92: tmp_new_sbox0 = 8'h4f; + 8'h93: tmp_new_sbox0 = 8'hdc; + 8'h94: tmp_new_sbox0 = 8'h22; + 8'h95: tmp_new_sbox0 = 8'h2a; + 8'h96: tmp_new_sbox0 = 8'h90; + 8'h97: tmp_new_sbox0 = 8'h88; + 8'h98: tmp_new_sbox0 = 8'h46; + 8'h99: tmp_new_sbox0 = 8'hee; + 8'h9a: tmp_new_sbox0 = 8'hb8; + 8'h9b: tmp_new_sbox0 = 8'h14; + 8'h9c: tmp_new_sbox0 = 8'hde; + 8'h9d: tmp_new_sbox0 = 8'h5e; + 8'h9e: tmp_new_sbox0 = 8'h0b; + 8'h9f: tmp_new_sbox0 = 8'hdb; + 8'ha0: tmp_new_sbox0 = 8'he0; + 8'ha1: tmp_new_sbox0 = 8'h32; + 8'ha2: tmp_new_sbox0 = 8'h3a; + 8'ha3: tmp_new_sbox0 = 8'h0a; + 8'ha4: tmp_new_sbox0 = 8'h49; + 8'ha5: tmp_new_sbox0 = 8'h06; + 8'ha6: tmp_new_sbox0 = 8'h24; + 8'ha7: tmp_new_sbox0 = 8'h5c; + 8'ha8: tmp_new_sbox0 = 8'hc2; + 8'ha9: tmp_new_sbox0 = 8'hd3; + 8'haa: tmp_new_sbox0 = 8'hac; + 8'hab: tmp_new_sbox0 = 8'h62; + 8'hac: tmp_new_sbox0 = 8'h91; + 8'had: tmp_new_sbox0 = 8'h95; + 8'hae: tmp_new_sbox0 = 8'he4; + 8'haf: tmp_new_sbox0 = 8'h79; + 8'hb0: tmp_new_sbox0 = 8'he7; + 8'hb1: tmp_new_sbox0 = 8'hc8; + 8'hb2: tmp_new_sbox0 = 8'h37; + 8'hb3: tmp_new_sbox0 = 8'h6d; + 8'hb4: tmp_new_sbox0 = 8'h8d; + 8'hb5: tmp_new_sbox0 = 8'hd5; + 8'hb6: tmp_new_sbox0 = 8'h4e; + 8'hb7: tmp_new_sbox0 = 8'ha9; + 8'hb8: tmp_new_sbox0 = 8'h6c; + 8'hb9: tmp_new_sbox0 = 8'h56; + 8'hba: tmp_new_sbox0 = 8'hf4; + 8'hbb: tmp_new_sbox0 = 8'hea; + 8'hbc: tmp_new_sbox0 = 8'h65; + 8'hbd: tmp_new_sbox0 = 8'h7a; + 8'hbe: tmp_new_sbox0 = 8'hae; + 8'hbf: tmp_new_sbox0 = 8'h08; + 8'hc0: tmp_new_sbox0 = 8'hba; + 8'hc1: tmp_new_sbox0 = 8'h78; + 8'hc2: tmp_new_sbox0 = 8'h25; + 8'hc3: tmp_new_sbox0 = 8'h2e; + 8'hc4: tmp_new_sbox0 = 8'h1c; + 8'hc5: tmp_new_sbox0 = 8'ha6; + 8'hc6: tmp_new_sbox0 = 8'hb4; + 8'hc7: tmp_new_sbox0 = 8'hc6; + 8'hc8: tmp_new_sbox0 = 8'he8; + 8'hc9: tmp_new_sbox0 = 8'hdd; + 8'hca: tmp_new_sbox0 = 8'h74; + 8'hcb: tmp_new_sbox0 = 8'h1f; + 8'hcc: tmp_new_sbox0 = 8'h4b; + 8'hcd: tmp_new_sbox0 = 8'hbd; + 8'hce: tmp_new_sbox0 = 8'h8b; + 8'hcf: tmp_new_sbox0 = 8'h8a; + 8'hd0: tmp_new_sbox0 = 8'h70; + 8'hd1: tmp_new_sbox0 = 8'h3e; + 8'hd2: tmp_new_sbox0 = 8'hb5; + 8'hd3: tmp_new_sbox0 = 8'h66; + 8'hd4: tmp_new_sbox0 = 8'h48; + 8'hd5: tmp_new_sbox0 = 8'h03; + 8'hd6: tmp_new_sbox0 = 8'hf6; + 8'hd7: tmp_new_sbox0 = 8'h0e; + 8'hd8: tmp_new_sbox0 = 8'h61; + 8'hd9: tmp_new_sbox0 = 8'h35; + 8'hda: tmp_new_sbox0 = 8'h57; + 8'hdb: tmp_new_sbox0 = 8'hb9; + 8'hdc: tmp_new_sbox0 = 8'h86; + 8'hdd: tmp_new_sbox0 = 8'hc1; + 8'hde: tmp_new_sbox0 = 8'h1d; + 8'hdf: tmp_new_sbox0 = 8'h9e; + 8'he0: tmp_new_sbox0 = 8'he1; + 8'he1: tmp_new_sbox0 = 8'hf8; + 8'he2: tmp_new_sbox0 = 8'h98; + 8'he3: tmp_new_sbox0 = 8'h11; + 8'he4: tmp_new_sbox0 = 8'h69; + 8'he5: tmp_new_sbox0 = 8'hd9; + 8'he6: tmp_new_sbox0 = 8'h8e; + 8'he7: tmp_new_sbox0 = 8'h94; + 8'he8: tmp_new_sbox0 = 8'h9b; + 8'he9: tmp_new_sbox0 = 8'h1e; + 8'hea: tmp_new_sbox0 = 8'h87; + 8'heb: tmp_new_sbox0 = 8'he9; + 8'hec: tmp_new_sbox0 = 8'hce; + 8'hed: tmp_new_sbox0 = 8'h55; + 8'hee: tmp_new_sbox0 = 8'h28; + 8'hef: tmp_new_sbox0 = 8'hdf; + 8'hf0: tmp_new_sbox0 = 8'h8c; + 8'hf1: tmp_new_sbox0 = 8'ha1; + 8'hf2: tmp_new_sbox0 = 8'h89; + 8'hf3: tmp_new_sbox0 = 8'h0d; + 8'hf4: tmp_new_sbox0 = 8'hbf; + 8'hf5: tmp_new_sbox0 = 8'he6; + 8'hf6: tmp_new_sbox0 = 8'h42; + 8'hf7: tmp_new_sbox0 = 8'h68; + 8'hf8: tmp_new_sbox0 = 8'h41; + 8'hf9: tmp_new_sbox0 = 8'h99; + 8'hfa: tmp_new_sbox0 = 8'h2d; + 8'hfb: tmp_new_sbox0 = 8'h0f; + 8'hfc: tmp_new_sbox0 = 8'hb0; + 8'hfd: tmp_new_sbox0 = 8'h54; + 8'hfe: tmp_new_sbox0 = 8'hbb; + 8'hff: tmp_new_sbox0 = 8'h16; + endcase // case (sboxw[31 : 24]) + end // sbox_rom0 + + + //---------------------------------------------------------------- + // sbox_rom1 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : sbox_rom1 + case(sboxw[23 : 16]) + 8'h00: tmp_new_sbox1 = 8'h63; + 8'h01: tmp_new_sbox1 = 8'h7c; + 8'h02: tmp_new_sbox1 = 8'h77; + 8'h03: tmp_new_sbox1 = 8'h7b; + 8'h04: tmp_new_sbox1 = 8'hf2; + 8'h05: tmp_new_sbox1 = 8'h6b; + 8'h06: tmp_new_sbox1 = 8'h6f; + 8'h07: tmp_new_sbox1 = 8'hc5; + 8'h08: tmp_new_sbox1 = 8'h30; + 8'h09: tmp_new_sbox1 = 8'h01; + 8'h0a: tmp_new_sbox1 = 8'h67; + 8'h0b: tmp_new_sbox1 = 8'h2b; + 8'h0c: tmp_new_sbox1 = 8'hfe; + 8'h0d: tmp_new_sbox1 = 8'hd7; + 8'h0e: tmp_new_sbox1 = 8'hab; + 8'h0f: tmp_new_sbox1 = 8'h76; + 8'h10: tmp_new_sbox1 = 8'hca; + 8'h11: tmp_new_sbox1 = 8'h82; + 8'h12: tmp_new_sbox1 = 8'hc9; + 8'h13: tmp_new_sbox1 = 8'h7d; + 8'h14: tmp_new_sbox1 = 8'hfa; + 8'h15: tmp_new_sbox1 = 8'h59; + 8'h16: tmp_new_sbox1 = 8'h47; + 8'h17: tmp_new_sbox1 = 8'hf0; + 8'h18: tmp_new_sbox1 = 8'had; + 8'h19: tmp_new_sbox1 = 8'hd4; + 8'h1a: tmp_new_sbox1 = 8'ha2; + 8'h1b: tmp_new_sbox1 = 8'haf; + 8'h1c: tmp_new_sbox1 = 8'h9c; + 8'h1d: tmp_new_sbox1 = 8'ha4; + 8'h1e: tmp_new_sbox1 = 8'h72; + 8'h1f: tmp_new_sbox1 = 8'hc0; + 8'h20: tmp_new_sbox1 = 8'hb7; + 8'h21: tmp_new_sbox1 = 8'hfd; + 8'h22: tmp_new_sbox1 = 8'h93; + 8'h23: tmp_new_sbox1 = 8'h26; + 8'h24: tmp_new_sbox1 = 8'h36; + 8'h25: tmp_new_sbox1 = 8'h3f; + 8'h26: tmp_new_sbox1 = 8'hf7; + 8'h27: tmp_new_sbox1 = 8'hcc; + 8'h28: tmp_new_sbox1 = 8'h34; + 8'h29: tmp_new_sbox1 = 8'ha5; + 8'h2a: tmp_new_sbox1 = 8'he5; + 8'h2b: tmp_new_sbox1 = 8'hf1; + 8'h2c: tmp_new_sbox1 = 8'h71; + 8'h2d: tmp_new_sbox1 = 8'hd8; + 8'h2e: tmp_new_sbox1 = 8'h31; + 8'h2f: tmp_new_sbox1 = 8'h15; + 8'h30: tmp_new_sbox1 = 8'h04; + 8'h31: tmp_new_sbox1 = 8'hc7; + 8'h32: tmp_new_sbox1 = 8'h23; + 8'h33: tmp_new_sbox1 = 8'hc3; + 8'h34: tmp_new_sbox1 = 8'h18; + 8'h35: tmp_new_sbox1 = 8'h96; + 8'h36: tmp_new_sbox1 = 8'h05; + 8'h37: tmp_new_sbox1 = 8'h9a; + 8'h38: tmp_new_sbox1 = 8'h07; + 8'h39: tmp_new_sbox1 = 8'h12; + 8'h3a: tmp_new_sbox1 = 8'h80; + 8'h3b: tmp_new_sbox1 = 8'he2; + 8'h3c: tmp_new_sbox1 = 8'heb; + 8'h3d: tmp_new_sbox1 = 8'h27; + 8'h3e: tmp_new_sbox1 = 8'hb2; + 8'h3f: tmp_new_sbox1 = 8'h75; + 8'h40: tmp_new_sbox1 = 8'h09; + 8'h41: tmp_new_sbox1 = 8'h83; + 8'h42: tmp_new_sbox1 = 8'h2c; + 8'h43: tmp_new_sbox1 = 8'h1a; + 8'h44: tmp_new_sbox1 = 8'h1b; + 8'h45: tmp_new_sbox1 = 8'h6e; + 8'h46: tmp_new_sbox1 = 8'h5a; + 8'h47: tmp_new_sbox1 = 8'ha0; + 8'h48: tmp_new_sbox1 = 8'h52; + 8'h49: tmp_new_sbox1 = 8'h3b; + 8'h4a: tmp_new_sbox1 = 8'hd6; + 8'h4b: tmp_new_sbox1 = 8'hb3; + 8'h4c: tmp_new_sbox1 = 8'h29; + 8'h4d: tmp_new_sbox1 = 8'he3; + 8'h4e: tmp_new_sbox1 = 8'h2f; + 8'h4f: tmp_new_sbox1 = 8'h84; + 8'h50: tmp_new_sbox1 = 8'h53; + 8'h51: tmp_new_sbox1 = 8'hd1; + 8'h52: tmp_new_sbox1 = 8'h00; + 8'h53: tmp_new_sbox1 = 8'hed; + 8'h54: tmp_new_sbox1 = 8'h20; + 8'h55: tmp_new_sbox1 = 8'hfc; + 8'h56: tmp_new_sbox1 = 8'hb1; + 8'h57: tmp_new_sbox1 = 8'h5b; + 8'h58: tmp_new_sbox1 = 8'h6a; + 8'h59: tmp_new_sbox1 = 8'hcb; + 8'h5a: tmp_new_sbox1 = 8'hbe; + 8'h5b: tmp_new_sbox1 = 8'h39; + 8'h5c: tmp_new_sbox1 = 8'h4a; + 8'h5d: tmp_new_sbox1 = 8'h4c; + 8'h5e: tmp_new_sbox1 = 8'h58; + 8'h5f: tmp_new_sbox1 = 8'hcf; + 8'h60: tmp_new_sbox1 = 8'hd0; + 8'h61: tmp_new_sbox1 = 8'hef; + 8'h62: tmp_new_sbox1 = 8'haa; + 8'h63: tmp_new_sbox1 = 8'hfb; + 8'h64: tmp_new_sbox1 = 8'h43; + 8'h65: tmp_new_sbox1 = 8'h4d; + 8'h66: tmp_new_sbox1 = 8'h33; + 8'h67: tmp_new_sbox1 = 8'h85; + 8'h68: tmp_new_sbox1 = 8'h45; + 8'h69: tmp_new_sbox1 = 8'hf9; + 8'h6a: tmp_new_sbox1 = 8'h02; + 8'h6b: tmp_new_sbox1 = 8'h7f; + 8'h6c: tmp_new_sbox1 = 8'h50; + 8'h6d: tmp_new_sbox1 = 8'h3c; + 8'h6e: tmp_new_sbox1 = 8'h9f; + 8'h6f: tmp_new_sbox1 = 8'ha8; + 8'h70: tmp_new_sbox1 = 8'h51; + 8'h71: tmp_new_sbox1 = 8'ha3; + 8'h72: tmp_new_sbox1 = 8'h40; + 8'h73: tmp_new_sbox1 = 8'h8f; + 8'h74: tmp_new_sbox1 = 8'h92; + 8'h75: tmp_new_sbox1 = 8'h9d; + 8'h76: tmp_new_sbox1 = 8'h38; + 8'h77: tmp_new_sbox1 = 8'hf5; + 8'h78: tmp_new_sbox1 = 8'hbc; + 8'h79: tmp_new_sbox1 = 8'hb6; + 8'h7a: tmp_new_sbox1 = 8'hda; + 8'h7b: tmp_new_sbox1 = 8'h21; + 8'h7c: tmp_new_sbox1 = 8'h10; + 8'h7d: tmp_new_sbox1 = 8'hff; + 8'h7e: tmp_new_sbox1 = 8'hf3; + 8'h7f: tmp_new_sbox1 = 8'hd2; + 8'h80: tmp_new_sbox1 = 8'hcd; + 8'h81: tmp_new_sbox1 = 8'h0c; + 8'h82: tmp_new_sbox1 = 8'h13; + 8'h83: tmp_new_sbox1 = 8'hec; + 8'h84: tmp_new_sbox1 = 8'h5f; + 8'h85: tmp_new_sbox1 = 8'h97; + 8'h86: tmp_new_sbox1 = 8'h44; + 8'h87: tmp_new_sbox1 = 8'h17; + 8'h88: tmp_new_sbox1 = 8'hc4; + 8'h89: tmp_new_sbox1 = 8'ha7; + 8'h8a: tmp_new_sbox1 = 8'h7e; + 8'h8b: tmp_new_sbox1 = 8'h3d; + 8'h8c: tmp_new_sbox1 = 8'h64; + 8'h8d: tmp_new_sbox1 = 8'h5d; + 8'h8e: tmp_new_sbox1 = 8'h19; + 8'h8f: tmp_new_sbox1 = 8'h73; + 8'h90: tmp_new_sbox1 = 8'h60; + 8'h91: tmp_new_sbox1 = 8'h81; + 8'h92: tmp_new_sbox1 = 8'h4f; + 8'h93: tmp_new_sbox1 = 8'hdc; + 8'h94: tmp_new_sbox1 = 8'h22; + 8'h95: tmp_new_sbox1 = 8'h2a; + 8'h96: tmp_new_sbox1 = 8'h90; + 8'h97: tmp_new_sbox1 = 8'h88; + 8'h98: tmp_new_sbox1 = 8'h46; + 8'h99: tmp_new_sbox1 = 8'hee; + 8'h9a: tmp_new_sbox1 = 8'hb8; + 8'h9b: tmp_new_sbox1 = 8'h14; + 8'h9c: tmp_new_sbox1 = 8'hde; + 8'h9d: tmp_new_sbox1 = 8'h5e; + 8'h9e: tmp_new_sbox1 = 8'h0b; + 8'h9f: tmp_new_sbox1 = 8'hdb; + 8'ha0: tmp_new_sbox1 = 8'he0; + 8'ha1: tmp_new_sbox1 = 8'h32; + 8'ha2: tmp_new_sbox1 = 8'h3a; + 8'ha3: tmp_new_sbox1 = 8'h0a; + 8'ha4: tmp_new_sbox1 = 8'h49; + 8'ha5: tmp_new_sbox1 = 8'h06; + 8'ha6: tmp_new_sbox1 = 8'h24; + 8'ha7: tmp_new_sbox1 = 8'h5c; + 8'ha8: tmp_new_sbox1 = 8'hc2; + 8'ha9: tmp_new_sbox1 = 8'hd3; + 8'haa: tmp_new_sbox1 = 8'hac; + 8'hab: tmp_new_sbox1 = 8'h62; + 8'hac: tmp_new_sbox1 = 8'h91; + 8'had: tmp_new_sbox1 = 8'h95; + 8'hae: tmp_new_sbox1 = 8'he4; + 8'haf: tmp_new_sbox1 = 8'h79; + 8'hb0: tmp_new_sbox1 = 8'he7; + 8'hb1: tmp_new_sbox1 = 8'hc8; + 8'hb2: tmp_new_sbox1 = 8'h37; + 8'hb3: tmp_new_sbox1 = 8'h6d; + 8'hb4: tmp_new_sbox1 = 8'h8d; + 8'hb5: tmp_new_sbox1 = 8'hd5; + 8'hb6: tmp_new_sbox1 = 8'h4e; + 8'hb7: tmp_new_sbox1 = 8'ha9; + 8'hb8: tmp_new_sbox1 = 8'h6c; + 8'hb9: tmp_new_sbox1 = 8'h56; + 8'hba: tmp_new_sbox1 = 8'hf4; + 8'hbb: tmp_new_sbox1 = 8'hea; + 8'hbc: tmp_new_sbox1 = 8'h65; + 8'hbd: tmp_new_sbox1 = 8'h7a; + 8'hbe: tmp_new_sbox1 = 8'hae; + 8'hbf: tmp_new_sbox1 = 8'h08; + 8'hc0: tmp_new_sbox1 = 8'hba; + 8'hc1: tmp_new_sbox1 = 8'h78; + 8'hc2: tmp_new_sbox1 = 8'h25; + 8'hc3: tmp_new_sbox1 = 8'h2e; + 8'hc4: tmp_new_sbox1 = 8'h1c; + 8'hc5: tmp_new_sbox1 = 8'ha6; + 8'hc6: tmp_new_sbox1 = 8'hb4; + 8'hc7: tmp_new_sbox1 = 8'hc6; + 8'hc8: tmp_new_sbox1 = 8'he8; + 8'hc9: tmp_new_sbox1 = 8'hdd; + 8'hca: tmp_new_sbox1 = 8'h74; + 8'hcb: tmp_new_sbox1 = 8'h1f; + 8'hcc: tmp_new_sbox1 = 8'h4b; + 8'hcd: tmp_new_sbox1 = 8'hbd; + 8'hce: tmp_new_sbox1 = 8'h8b; + 8'hcf: tmp_new_sbox1 = 8'h8a; + 8'hd0: tmp_new_sbox1 = 8'h70; + 8'hd1: tmp_new_sbox1 = 8'h3e; + 8'hd2: tmp_new_sbox1 = 8'hb5; + 8'hd3: tmp_new_sbox1 = 8'h66; + 8'hd4: tmp_new_sbox1 = 8'h48; + 8'hd5: tmp_new_sbox1 = 8'h03; + 8'hd6: tmp_new_sbox1 = 8'hf6; + 8'hd7: tmp_new_sbox1 = 8'h0e; + 8'hd8: tmp_new_sbox1 = 8'h61; + 8'hd9: tmp_new_sbox1 = 8'h35; + 8'hda: tmp_new_sbox1 = 8'h57; + 8'hdb: tmp_new_sbox1 = 8'hb9; + 8'hdc: tmp_new_sbox1 = 8'h86; + 8'hdd: tmp_new_sbox1 = 8'hc1; + 8'hde: tmp_new_sbox1 = 8'h1d; + 8'hdf: tmp_new_sbox1 = 8'h9e; + 8'he0: tmp_new_sbox1 = 8'he1; + 8'he1: tmp_new_sbox1 = 8'hf8; + 8'he2: tmp_new_sbox1 = 8'h98; + 8'he3: tmp_new_sbox1 = 8'h11; + 8'he4: tmp_new_sbox1 = 8'h69; + 8'he5: tmp_new_sbox1 = 8'hd9; + 8'he6: tmp_new_sbox1 = 8'h8e; + 8'he7: tmp_new_sbox1 = 8'h94; + 8'he8: tmp_new_sbox1 = 8'h9b; + 8'he9: tmp_new_sbox1 = 8'h1e; + 8'hea: tmp_new_sbox1 = 8'h87; + 8'heb: tmp_new_sbox1 = 8'he9; + 8'hec: tmp_new_sbox1 = 8'hce; + 8'hed: tmp_new_sbox1 = 8'h55; + 8'hee: tmp_new_sbox1 = 8'h28; + 8'hef: tmp_new_sbox1 = 8'hdf; + 8'hf0: tmp_new_sbox1 = 8'h8c; + 8'hf1: tmp_new_sbox1 = 8'ha1; + 8'hf2: tmp_new_sbox1 = 8'h89; + 8'hf3: tmp_new_sbox1 = 8'h0d; + 8'hf4: tmp_new_sbox1 = 8'hbf; + 8'hf5: tmp_new_sbox1 = 8'he6; + 8'hf6: tmp_new_sbox1 = 8'h42; + 8'hf7: tmp_new_sbox1 = 8'h68; + 8'hf8: tmp_new_sbox1 = 8'h41; + 8'hf9: tmp_new_sbox1 = 8'h99; + 8'hfa: tmp_new_sbox1 = 8'h2d; + 8'hfb: tmp_new_sbox1 = 8'h0f; + 8'hfc: tmp_new_sbox1 = 8'hb0; + 8'hfd: tmp_new_sbox1 = 8'h54; + 8'hfe: tmp_new_sbox1 = 8'hbb; + 8'hff: tmp_new_sbox1 = 8'h16; + endcase // case (sboxw[23 : 16]) + end // sbox_rom1 + + + //---------------------------------------------------------------- + // sbox_rom2 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : sbox_rom2 + case(sboxw[15 : 8]) + 8'h00: tmp_new_sbox2 = 8'h63; + 8'h01: tmp_new_sbox2 = 8'h7c; + 8'h02: tmp_new_sbox2 = 8'h77; + 8'h03: tmp_new_sbox2 = 8'h7b; + 8'h04: tmp_new_sbox2 = 8'hf2; + 8'h05: tmp_new_sbox2 = 8'h6b; + 8'h06: tmp_new_sbox2 = 8'h6f; + 8'h07: tmp_new_sbox2 = 8'hc5; + 8'h08: tmp_new_sbox2 = 8'h30; + 8'h09: tmp_new_sbox2 = 8'h01; + 8'h0a: tmp_new_sbox2 = 8'h67; + 8'h0b: tmp_new_sbox2 = 8'h2b; + 8'h0c: tmp_new_sbox2 = 8'hfe; + 8'h0d: tmp_new_sbox2 = 8'hd7; + 8'h0e: tmp_new_sbox2 = 8'hab; + 8'h0f: tmp_new_sbox2 = 8'h76; + 8'h10: tmp_new_sbox2 = 8'hca; + 8'h11: tmp_new_sbox2 = 8'h82; + 8'h12: tmp_new_sbox2 = 8'hc9; + 8'h13: tmp_new_sbox2 = 8'h7d; + 8'h14: tmp_new_sbox2 = 8'hfa; + 8'h15: tmp_new_sbox2 = 8'h59; + 8'h16: tmp_new_sbox2 = 8'h47; + 8'h17: tmp_new_sbox2 = 8'hf0; + 8'h18: tmp_new_sbox2 = 8'had; + 8'h19: tmp_new_sbox2 = 8'hd4; + 8'h1a: tmp_new_sbox2 = 8'ha2; + 8'h1b: tmp_new_sbox2 = 8'haf; + 8'h1c: tmp_new_sbox2 = 8'h9c; + 8'h1d: tmp_new_sbox2 = 8'ha4; + 8'h1e: tmp_new_sbox2 = 8'h72; + 8'h1f: tmp_new_sbox2 = 8'hc0; + 8'h20: tmp_new_sbox2 = 8'hb7; + 8'h21: tmp_new_sbox2 = 8'hfd; + 8'h22: tmp_new_sbox2 = 8'h93; + 8'h23: tmp_new_sbox2 = 8'h26; + 8'h24: tmp_new_sbox2 = 8'h36; + 8'h25: tmp_new_sbox2 = 8'h3f; + 8'h26: tmp_new_sbox2 = 8'hf7; + 8'h27: tmp_new_sbox2 = 8'hcc; + 8'h28: tmp_new_sbox2 = 8'h34; + 8'h29: tmp_new_sbox2 = 8'ha5; + 8'h2a: tmp_new_sbox2 = 8'he5; + 8'h2b: tmp_new_sbox2 = 8'hf1; + 8'h2c: tmp_new_sbox2 = 8'h71; + 8'h2d: tmp_new_sbox2 = 8'hd8; + 8'h2e: tmp_new_sbox2 = 8'h31; + 8'h2f: tmp_new_sbox2 = 8'h15; + 8'h30: tmp_new_sbox2 = 8'h04; + 8'h31: tmp_new_sbox2 = 8'hc7; + 8'h32: tmp_new_sbox2 = 8'h23; + 8'h33: tmp_new_sbox2 = 8'hc3; + 8'h34: tmp_new_sbox2 = 8'h18; + 8'h35: tmp_new_sbox2 = 8'h96; + 8'h36: tmp_new_sbox2 = 8'h05; + 8'h37: tmp_new_sbox2 = 8'h9a; + 8'h38: tmp_new_sbox2 = 8'h07; + 8'h39: tmp_new_sbox2 = 8'h12; + 8'h3a: tmp_new_sbox2 = 8'h80; + 8'h3b: tmp_new_sbox2 = 8'he2; + 8'h3c: tmp_new_sbox2 = 8'heb; + 8'h3d: tmp_new_sbox2 = 8'h27; + 8'h3e: tmp_new_sbox2 = 8'hb2; + 8'h3f: tmp_new_sbox2 = 8'h75; + 8'h40: tmp_new_sbox2 = 8'h09; + 8'h41: tmp_new_sbox2 = 8'h83; + 8'h42: tmp_new_sbox2 = 8'h2c; + 8'h43: tmp_new_sbox2 = 8'h1a; + 8'h44: tmp_new_sbox2 = 8'h1b; + 8'h45: tmp_new_sbox2 = 8'h6e; + 8'h46: tmp_new_sbox2 = 8'h5a; + 8'h47: tmp_new_sbox2 = 8'ha0; + 8'h48: tmp_new_sbox2 = 8'h52; + 8'h49: tmp_new_sbox2 = 8'h3b; + 8'h4a: tmp_new_sbox2 = 8'hd6; + 8'h4b: tmp_new_sbox2 = 8'hb3; + 8'h4c: tmp_new_sbox2 = 8'h29; + 8'h4d: tmp_new_sbox2 = 8'he3; + 8'h4e: tmp_new_sbox2 = 8'h2f; + 8'h4f: tmp_new_sbox2 = 8'h84; + 8'h50: tmp_new_sbox2 = 8'h53; + 8'h51: tmp_new_sbox2 = 8'hd1; + 8'h52: tmp_new_sbox2 = 8'h00; + 8'h53: tmp_new_sbox2 = 8'hed; + 8'h54: tmp_new_sbox2 = 8'h20; + 8'h55: tmp_new_sbox2 = 8'hfc; + 8'h56: tmp_new_sbox2 = 8'hb1; + 8'h57: tmp_new_sbox2 = 8'h5b; + 8'h58: tmp_new_sbox2 = 8'h6a; + 8'h59: tmp_new_sbox2 = 8'hcb; + 8'h5a: tmp_new_sbox2 = 8'hbe; + 8'h5b: tmp_new_sbox2 = 8'h39; + 8'h5c: tmp_new_sbox2 = 8'h4a; + 8'h5d: tmp_new_sbox2 = 8'h4c; + 8'h5e: tmp_new_sbox2 = 8'h58; + 8'h5f: tmp_new_sbox2 = 8'hcf; + 8'h60: tmp_new_sbox2 = 8'hd0; + 8'h61: tmp_new_sbox2 = 8'hef; + 8'h62: tmp_new_sbox2 = 8'haa; + 8'h63: tmp_new_sbox2 = 8'hfb; + 8'h64: tmp_new_sbox2 = 8'h43; + 8'h65: tmp_new_sbox2 = 8'h4d; + 8'h66: tmp_new_sbox2 = 8'h33; + 8'h67: tmp_new_sbox2 = 8'h85; + 8'h68: tmp_new_sbox2 = 8'h45; + 8'h69: tmp_new_sbox2 = 8'hf9; + 8'h6a: tmp_new_sbox2 = 8'h02; + 8'h6b: tmp_new_sbox2 = 8'h7f; + 8'h6c: tmp_new_sbox2 = 8'h50; + 8'h6d: tmp_new_sbox2 = 8'h3c; + 8'h6e: tmp_new_sbox2 = 8'h9f; + 8'h6f: tmp_new_sbox2 = 8'ha8; + 8'h70: tmp_new_sbox2 = 8'h51; + 8'h71: tmp_new_sbox2 = 8'ha3; + 8'h72: tmp_new_sbox2 = 8'h40; + 8'h73: tmp_new_sbox2 = 8'h8f; + 8'h74: tmp_new_sbox2 = 8'h92; + 8'h75: tmp_new_sbox2 = 8'h9d; + 8'h76: tmp_new_sbox2 = 8'h38; + 8'h77: tmp_new_sbox2 = 8'hf5; + 8'h78: tmp_new_sbox2 = 8'hbc; + 8'h79: tmp_new_sbox2 = 8'hb6; + 8'h7a: tmp_new_sbox2 = 8'hda; + 8'h7b: tmp_new_sbox2 = 8'h21; + 8'h7c: tmp_new_sbox2 = 8'h10; + 8'h7d: tmp_new_sbox2 = 8'hff; + 8'h7e: tmp_new_sbox2 = 8'hf3; + 8'h7f: tmp_new_sbox2 = 8'hd2; + 8'h80: tmp_new_sbox2 = 8'hcd; + 8'h81: tmp_new_sbox2 = 8'h0c; + 8'h82: tmp_new_sbox2 = 8'h13; + 8'h83: tmp_new_sbox2 = 8'hec; + 8'h84: tmp_new_sbox2 = 8'h5f; + 8'h85: tmp_new_sbox2 = 8'h97; + 8'h86: tmp_new_sbox2 = 8'h44; + 8'h87: tmp_new_sbox2 = 8'h17; + 8'h88: tmp_new_sbox2 = 8'hc4; + 8'h89: tmp_new_sbox2 = 8'ha7; + 8'h8a: tmp_new_sbox2 = 8'h7e; + 8'h8b: tmp_new_sbox2 = 8'h3d; + 8'h8c: tmp_new_sbox2 = 8'h64; + 8'h8d: tmp_new_sbox2 = 8'h5d; + 8'h8e: tmp_new_sbox2 = 8'h19; + 8'h8f: tmp_new_sbox2 = 8'h73; + 8'h90: tmp_new_sbox2 = 8'h60; + 8'h91: tmp_new_sbox2 = 8'h81; + 8'h92: tmp_new_sbox2 = 8'h4f; + 8'h93: tmp_new_sbox2 = 8'hdc; + 8'h94: tmp_new_sbox2 = 8'h22; + 8'h95: tmp_new_sbox2 = 8'h2a; + 8'h96: tmp_new_sbox2 = 8'h90; + 8'h97: tmp_new_sbox2 = 8'h88; + 8'h98: tmp_new_sbox2 = 8'h46; + 8'h99: tmp_new_sbox2 = 8'hee; + 8'h9a: tmp_new_sbox2 = 8'hb8; + 8'h9b: tmp_new_sbox2 = 8'h14; + 8'h9c: tmp_new_sbox2 = 8'hde; + 8'h9d: tmp_new_sbox2 = 8'h5e; + 8'h9e: tmp_new_sbox2 = 8'h0b; + 8'h9f: tmp_new_sbox2 = 8'hdb; + 8'ha0: tmp_new_sbox2 = 8'he0; + 8'ha1: tmp_new_sbox2 = 8'h32; + 8'ha2: tmp_new_sbox2 = 8'h3a; + 8'ha3: tmp_new_sbox2 = 8'h0a; + 8'ha4: tmp_new_sbox2 = 8'h49; + 8'ha5: tmp_new_sbox2 = 8'h06; + 8'ha6: tmp_new_sbox2 = 8'h24; + 8'ha7: tmp_new_sbox2 = 8'h5c; + 8'ha8: tmp_new_sbox2 = 8'hc2; + 8'ha9: tmp_new_sbox2 = 8'hd3; + 8'haa: tmp_new_sbox2 = 8'hac; + 8'hab: tmp_new_sbox2 = 8'h62; + 8'hac: tmp_new_sbox2 = 8'h91; + 8'had: tmp_new_sbox2 = 8'h95; + 8'hae: tmp_new_sbox2 = 8'he4; + 8'haf: tmp_new_sbox2 = 8'h79; + 8'hb0: tmp_new_sbox2 = 8'he7; + 8'hb1: tmp_new_sbox2 = 8'hc8; + 8'hb2: tmp_new_sbox2 = 8'h37; + 8'hb3: tmp_new_sbox2 = 8'h6d; + 8'hb4: tmp_new_sbox2 = 8'h8d; + 8'hb5: tmp_new_sbox2 = 8'hd5; + 8'hb6: tmp_new_sbox2 = 8'h4e; + 8'hb7: tmp_new_sbox2 = 8'ha9; + 8'hb8: tmp_new_sbox2 = 8'h6c; + 8'hb9: tmp_new_sbox2 = 8'h56; + 8'hba: tmp_new_sbox2 = 8'hf4; + 8'hbb: tmp_new_sbox2 = 8'hea; + 8'hbc: tmp_new_sbox2 = 8'h65; + 8'hbd: tmp_new_sbox2 = 8'h7a; + 8'hbe: tmp_new_sbox2 = 8'hae; + 8'hbf: tmp_new_sbox2 = 8'h08; + 8'hc0: tmp_new_sbox2 = 8'hba; + 8'hc1: tmp_new_sbox2 = 8'h78; + 8'hc2: tmp_new_sbox2 = 8'h25; + 8'hc3: tmp_new_sbox2 = 8'h2e; + 8'hc4: tmp_new_sbox2 = 8'h1c; + 8'hc5: tmp_new_sbox2 = 8'ha6; + 8'hc6: tmp_new_sbox2 = 8'hb4; + 8'hc7: tmp_new_sbox2 = 8'hc6; + 8'hc8: tmp_new_sbox2 = 8'he8; + 8'hc9: tmp_new_sbox2 = 8'hdd; + 8'hca: tmp_new_sbox2 = 8'h74; + 8'hcb: tmp_new_sbox2 = 8'h1f; + 8'hcc: tmp_new_sbox2 = 8'h4b; + 8'hcd: tmp_new_sbox2 = 8'hbd; + 8'hce: tmp_new_sbox2 = 8'h8b; + 8'hcf: tmp_new_sbox2 = 8'h8a; + 8'hd0: tmp_new_sbox2 = 8'h70; + 8'hd1: tmp_new_sbox2 = 8'h3e; + 8'hd2: tmp_new_sbox2 = 8'hb5; + 8'hd3: tmp_new_sbox2 = 8'h66; + 8'hd4: tmp_new_sbox2 = 8'h48; + 8'hd5: tmp_new_sbox2 = 8'h03; + 8'hd6: tmp_new_sbox2 = 8'hf6; + 8'hd7: tmp_new_sbox2 = 8'h0e; + 8'hd8: tmp_new_sbox2 = 8'h61; + 8'hd9: tmp_new_sbox2 = 8'h35; + 8'hda: tmp_new_sbox2 = 8'h57; + 8'hdb: tmp_new_sbox2 = 8'hb9; + 8'hdc: tmp_new_sbox2 = 8'h86; + 8'hdd: tmp_new_sbox2 = 8'hc1; + 8'hde: tmp_new_sbox2 = 8'h1d; + 8'hdf: tmp_new_sbox2 = 8'h9e; + 8'he0: tmp_new_sbox2 = 8'he1; + 8'he1: tmp_new_sbox2 = 8'hf8; + 8'he2: tmp_new_sbox2 = 8'h98; + 8'he3: tmp_new_sbox2 = 8'h11; + 8'he4: tmp_new_sbox2 = 8'h69; + 8'he5: tmp_new_sbox2 = 8'hd9; + 8'he6: tmp_new_sbox2 = 8'h8e; + 8'he7: tmp_new_sbox2 = 8'h94; + 8'he8: tmp_new_sbox2 = 8'h9b; + 8'he9: tmp_new_sbox2 = 8'h1e; + 8'hea: tmp_new_sbox2 = 8'h87; + 8'heb: tmp_new_sbox2 = 8'he9; + 8'hec: tmp_new_sbox2 = 8'hce; + 8'hed: tmp_new_sbox2 = 8'h55; + 8'hee: tmp_new_sbox2 = 8'h28; + 8'hef: tmp_new_sbox2 = 8'hdf; + 8'hf0: tmp_new_sbox2 = 8'h8c; + 8'hf1: tmp_new_sbox2 = 8'ha1; + 8'hf2: tmp_new_sbox2 = 8'h89; + 8'hf3: tmp_new_sbox2 = 8'h0d; + 8'hf4: tmp_new_sbox2 = 8'hbf; + 8'hf5: tmp_new_sbox2 = 8'he6; + 8'hf6: tmp_new_sbox2 = 8'h42; + 8'hf7: tmp_new_sbox2 = 8'h68; + 8'hf8: tmp_new_sbox2 = 8'h41; + 8'hf9: tmp_new_sbox2 = 8'h99; + 8'hfa: tmp_new_sbox2 = 8'h2d; + 8'hfb: tmp_new_sbox2 = 8'h0f; + 8'hfc: tmp_new_sbox2 = 8'hb0; + 8'hfd: tmp_new_sbox2 = 8'h54; + 8'hfe: tmp_new_sbox2 = 8'hbb; + 8'hff: tmp_new_sbox2 = 8'h16; + endcase // case (sboxw[15 : 8]) + end // sbox_rom2 + + + //---------------------------------------------------------------- + // sbox_rom3 + // + // The logic implemeting the ROM with mux. + //---------------------------------------------------------------- + always @* + begin : sbox_rom3 + case(sboxw[7 : 0]) + 8'h00: tmp_new_sbox3 = 8'h63; + 8'h01: tmp_new_sbox3 = 8'h7c; + 8'h02: tmp_new_sbox3 = 8'h77; + 8'h03: tmp_new_sbox3 = 8'h7b; + 8'h04: tmp_new_sbox3 = 8'hf2; + 8'h05: tmp_new_sbox3 = 8'h6b; + 8'h06: tmp_new_sbox3 = 8'h6f; + 8'h07: tmp_new_sbox3 = 8'hc5; + 8'h08: tmp_new_sbox3 = 8'h30; + 8'h09: tmp_new_sbox3 = 8'h01; + 8'h0a: tmp_new_sbox3 = 8'h67; + 8'h0b: tmp_new_sbox3 = 8'h2b; + 8'h0c: tmp_new_sbox3 = 8'hfe; + 8'h0d: tmp_new_sbox3 = 8'hd7; + 8'h0e: tmp_new_sbox3 = 8'hab; + 8'h0f: tmp_new_sbox3 = 8'h76; + 8'h10: tmp_new_sbox3 = 8'hca; + 8'h11: tmp_new_sbox3 = 8'h82; + 8'h12: tmp_new_sbox3 = 8'hc9; + 8'h13: tmp_new_sbox3 = 8'h7d; + 8'h14: tmp_new_sbox3 = 8'hfa; + 8'h15: tmp_new_sbox3 = 8'h59; + 8'h16: tmp_new_sbox3 = 8'h47; + 8'h17: tmp_new_sbox3 = 8'hf0; + 8'h18: tmp_new_sbox3 = 8'had; + 8'h19: tmp_new_sbox3 = 8'hd4; + 8'h1a: tmp_new_sbox3 = 8'ha2; + 8'h1b: tmp_new_sbox3 = 8'haf; + 8'h1c: tmp_new_sbox3 = 8'h9c; + 8'h1d: tmp_new_sbox3 = 8'ha4; + 8'h1e: tmp_new_sbox3 = 8'h72; + 8'h1f: tmp_new_sbox3 = 8'hc0; + 8'h20: tmp_new_sbox3 = 8'hb7; + 8'h21: tmp_new_sbox3 = 8'hfd; + 8'h22: tmp_new_sbox3 = 8'h93; + 8'h23: tmp_new_sbox3 = 8'h26; + 8'h24: tmp_new_sbox3 = 8'h36; + 8'h25: tmp_new_sbox3 = 8'h3f; + 8'h26: tmp_new_sbox3 = 8'hf7; + 8'h27: tmp_new_sbox3 = 8'hcc; + 8'h28: tmp_new_sbox3 = 8'h34; + 8'h29: tmp_new_sbox3 = 8'ha5; + 8'h2a: tmp_new_sbox3 = 8'he5; + 8'h2b: tmp_new_sbox3 = 8'hf1; + 8'h2c: tmp_new_sbox3 = 8'h71; + 8'h2d: tmp_new_sbox3 = 8'hd8; + 8'h2e: tmp_new_sbox3 = 8'h31; + 8'h2f: tmp_new_sbox3 = 8'h15; + 8'h30: tmp_new_sbox3 = 8'h04; + 8'h31: tmp_new_sbox3 = 8'hc7; + 8'h32: tmp_new_sbox3 = 8'h23; + 8'h33: tmp_new_sbox3 = 8'hc3; + 8'h34: tmp_new_sbox3 = 8'h18; + 8'h35: tmp_new_sbox3 = 8'h96; + 8'h36: tmp_new_sbox3 = 8'h05; + 8'h37: tmp_new_sbox3 = 8'h9a; + 8'h38: tmp_new_sbox3 = 8'h07; + 8'h39: tmp_new_sbox3 = 8'h12; + 8'h3a: tmp_new_sbox3 = 8'h80; + 8'h3b: tmp_new_sbox3 = 8'he2; + 8'h3c: tmp_new_sbox3 = 8'heb; + 8'h3d: tmp_new_sbox3 = 8'h27; + 8'h3e: tmp_new_sbox3 = 8'hb2; + 8'h3f: tmp_new_sbox3 = 8'h75; + 8'h40: tmp_new_sbox3 = 8'h09; + 8'h41: tmp_new_sbox3 = 8'h83; + 8'h42: tmp_new_sbox3 = 8'h2c; + 8'h43: tmp_new_sbox3 = 8'h1a; + 8'h44: tmp_new_sbox3 = 8'h1b; + 8'h45: tmp_new_sbox3 = 8'h6e; + 8'h46: tmp_new_sbox3 = 8'h5a; + 8'h47: tmp_new_sbox3 = 8'ha0; + 8'h48: tmp_new_sbox3 = 8'h52; + 8'h49: tmp_new_sbox3 = 8'h3b; + 8'h4a: tmp_new_sbox3 = 8'hd6; + 8'h4b: tmp_new_sbox3 = 8'hb3; + 8'h4c: tmp_new_sbox3 = 8'h29; + 8'h4d: tmp_new_sbox3 = 8'he3; + 8'h4e: tmp_new_sbox3 = 8'h2f; + 8'h4f: tmp_new_sbox3 = 8'h84; + 8'h50: tmp_new_sbox3 = 8'h53; + 8'h51: tmp_new_sbox3 = 8'hd1; + 8'h52: tmp_new_sbox3 = 8'h00; + 8'h53: tmp_new_sbox3 = 8'hed; + 8'h54: tmp_new_sbox3 = 8'h20; + 8'h55: tmp_new_sbox3 = 8'hfc; + 8'h56: tmp_new_sbox3 = 8'hb1; + 8'h57: tmp_new_sbox3 = 8'h5b; + 8'h58: tmp_new_sbox3 = 8'h6a; + 8'h59: tmp_new_sbox3 = 8'hcb; + 8'h5a: tmp_new_sbox3 = 8'hbe; + 8'h5b: tmp_new_sbox3 = 8'h39; + 8'h5c: tmp_new_sbox3 = 8'h4a; + 8'h5d: tmp_new_sbox3 = 8'h4c; + 8'h5e: tmp_new_sbox3 = 8'h58; + 8'h5f: tmp_new_sbox3 = 8'hcf; + 8'h60: tmp_new_sbox3 = 8'hd0; + 8'h61: tmp_new_sbox3 = 8'hef; + 8'h62: tmp_new_sbox3 = 8'haa; + 8'h63: tmp_new_sbox3 = 8'hfb; + 8'h64: tmp_new_sbox3 = 8'h43; + 8'h65: tmp_new_sbox3 = 8'h4d; + 8'h66: tmp_new_sbox3 = 8'h33; + 8'h67: tmp_new_sbox3 = 8'h85; + 8'h68: tmp_new_sbox3 = 8'h45; + 8'h69: tmp_new_sbox3 = 8'hf9; + 8'h6a: tmp_new_sbox3 = 8'h02; + 8'h6b: tmp_new_sbox3 = 8'h7f; + 8'h6c: tmp_new_sbox3 = 8'h50; + 8'h6d: tmp_new_sbox3 = 8'h3c; + 8'h6e: tmp_new_sbox3 = 8'h9f; + 8'h6f: tmp_new_sbox3 = 8'ha8; + 8'h70: tmp_new_sbox3 = 8'h51; + 8'h71: tmp_new_sbox3 = 8'ha3; + 8'h72: tmp_new_sbox3 = 8'h40; + 8'h73: tmp_new_sbox3 = 8'h8f; + 8'h74: tmp_new_sbox3 = 8'h92; + 8'h75: tmp_new_sbox3 = 8'h9d; + 8'h76: tmp_new_sbox3 = 8'h38; + 8'h77: tmp_new_sbox3 = 8'hf5; + 8'h78: tmp_new_sbox3 = 8'hbc; + 8'h79: tmp_new_sbox3 = 8'hb6; + 8'h7a: tmp_new_sbox3 = 8'hda; + 8'h7b: tmp_new_sbox3 = 8'h21; + 8'h7c: tmp_new_sbox3 = 8'h10; + 8'h7d: tmp_new_sbox3 = 8'hff; + 8'h7e: tmp_new_sbox3 = 8'hf3; + 8'h7f: tmp_new_sbox3 = 8'hd2; + 8'h80: tmp_new_sbox3 = 8'hcd; + 8'h81: tmp_new_sbox3 = 8'h0c; + 8'h82: tmp_new_sbox3 = 8'h13; + 8'h83: tmp_new_sbox3 = 8'hec; + 8'h84: tmp_new_sbox3 = 8'h5f; + 8'h85: tmp_new_sbox3 = 8'h97; + 8'h86: tmp_new_sbox3 = 8'h44; + 8'h87: tmp_new_sbox3 = 8'h17; + 8'h88: tmp_new_sbox3 = 8'hc4; + 8'h89: tmp_new_sbox3 = 8'ha7; + 8'h8a: tmp_new_sbox3 = 8'h7e; + 8'h8b: tmp_new_sbox3 = 8'h3d; + 8'h8c: tmp_new_sbox3 = 8'h64; + 8'h8d: tmp_new_sbox3 = 8'h5d; + 8'h8e: tmp_new_sbox3 = 8'h19; + 8'h8f: tmp_new_sbox3 = 8'h73; + 8'h90: tmp_new_sbox3 = 8'h60; + 8'h91: tmp_new_sbox3 = 8'h81; + 8'h92: tmp_new_sbox3 = 8'h4f; + 8'h93: tmp_new_sbox3 = 8'hdc; + 8'h94: tmp_new_sbox3 = 8'h22; + 8'h95: tmp_new_sbox3 = 8'h2a; + 8'h96: tmp_new_sbox3 = 8'h90; + 8'h97: tmp_new_sbox3 = 8'h88; + 8'h98: tmp_new_sbox3 = 8'h46; + 8'h99: tmp_new_sbox3 = 8'hee; + 8'h9a: tmp_new_sbox3 = 8'hb8; + 8'h9b: tmp_new_sbox3 = 8'h14; + 8'h9c: tmp_new_sbox3 = 8'hde; + 8'h9d: tmp_new_sbox3 = 8'h5e; + 8'h9e: tmp_new_sbox3 = 8'h0b; + 8'h9f: tmp_new_sbox3 = 8'hdb; + 8'ha0: tmp_new_sbox3 = 8'he0; + 8'ha1: tmp_new_sbox3 = 8'h32; + 8'ha2: tmp_new_sbox3 = 8'h3a; + 8'ha3: tmp_new_sbox3 = 8'h0a; + 8'ha4: tmp_new_sbox3 = 8'h49; + 8'ha5: tmp_new_sbox3 = 8'h06; + 8'ha6: tmp_new_sbox3 = 8'h24; + 8'ha7: tmp_new_sbox3 = 8'h5c; + 8'ha8: tmp_new_sbox3 = 8'hc2; + 8'ha9: tmp_new_sbox3 = 8'hd3; + 8'haa: tmp_new_sbox3 = 8'hac; + 8'hab: tmp_new_sbox3 = 8'h62; + 8'hac: tmp_new_sbox3 = 8'h91; + 8'had: tmp_new_sbox3 = 8'h95; + 8'hae: tmp_new_sbox3 = 8'he4; + 8'haf: tmp_new_sbox3 = 8'h79; + 8'hb0: tmp_new_sbox3 = 8'he7; + 8'hb1: tmp_new_sbox3 = 8'hc8; + 8'hb2: tmp_new_sbox3 = 8'h37; + 8'hb3: tmp_new_sbox3 = 8'h6d; + 8'hb4: tmp_new_sbox3 = 8'h8d; + 8'hb5: tmp_new_sbox3 = 8'hd5; + 8'hb6: tmp_new_sbox3 = 8'h4e; + 8'hb7: tmp_new_sbox3 = 8'ha9; + 8'hb8: tmp_new_sbox3 = 8'h6c; + 8'hb9: tmp_new_sbox3 = 8'h56; + 8'hba: tmp_new_sbox3 = 8'hf4; + 8'hbb: tmp_new_sbox3 = 8'hea; + 8'hbc: tmp_new_sbox3 = 8'h65; + 8'hbd: tmp_new_sbox3 = 8'h7a; + 8'hbe: tmp_new_sbox3 = 8'hae; + 8'hbf: tmp_new_sbox3 = 8'h08; + 8'hc0: tmp_new_sbox3 = 8'hba; + 8'hc1: tmp_new_sbox3 = 8'h78; + 8'hc2: tmp_new_sbox3 = 8'h25; + 8'hc3: tmp_new_sbox3 = 8'h2e; + 8'hc4: tmp_new_sbox3 = 8'h1c; + 8'hc5: tmp_new_sbox3 = 8'ha6; + 8'hc6: tmp_new_sbox3 = 8'hb4; + 8'hc7: tmp_new_sbox3 = 8'hc6; + 8'hc8: tmp_new_sbox3 = 8'he8; + 8'hc9: tmp_new_sbox3 = 8'hdd; + 8'hca: tmp_new_sbox3 = 8'h74; + 8'hcb: tmp_new_sbox3 = 8'h1f; + 8'hcc: tmp_new_sbox3 = 8'h4b; + 8'hcd: tmp_new_sbox3 = 8'hbd; + 8'hce: tmp_new_sbox3 = 8'h8b; + 8'hcf: tmp_new_sbox3 = 8'h8a; + 8'hd0: tmp_new_sbox3 = 8'h70; + 8'hd1: tmp_new_sbox3 = 8'h3e; + 8'hd2: tmp_new_sbox3 = 8'hb5; + 8'hd3: tmp_new_sbox3 = 8'h66; + 8'hd4: tmp_new_sbox3 = 8'h48; + 8'hd5: tmp_new_sbox3 = 8'h03; + 8'hd6: tmp_new_sbox3 = 8'hf6; + 8'hd7: tmp_new_sbox3 = 8'h0e; + 8'hd8: tmp_new_sbox3 = 8'h61; + 8'hd9: tmp_new_sbox3 = 8'h35; + 8'hda: tmp_new_sbox3 = 8'h57; + 8'hdb: tmp_new_sbox3 = 8'hb9; + 8'hdc: tmp_new_sbox3 = 8'h86; + 8'hdd: tmp_new_sbox3 = 8'hc1; + 8'hde: tmp_new_sbox3 = 8'h1d; + 8'hdf: tmp_new_sbox3 = 8'h9e; + 8'he0: tmp_new_sbox3 = 8'he1; + 8'he1: tmp_new_sbox3 = 8'hf8; + 8'he2: tmp_new_sbox3 = 8'h98; + 8'he3: tmp_new_sbox3 = 8'h11; + 8'he4: tmp_new_sbox3 = 8'h69; + 8'he5: tmp_new_sbox3 = 8'hd9; + 8'he6: tmp_new_sbox3 = 8'h8e; + 8'he7: tmp_new_sbox3 = 8'h94; + 8'he8: tmp_new_sbox3 = 8'h9b; + 8'he9: tmp_new_sbox3 = 8'h1e; + 8'hea: tmp_new_sbox3 = 8'h87; + 8'heb: tmp_new_sbox3 = 8'he9; + 8'hec: tmp_new_sbox3 = 8'hce; + 8'hed: tmp_new_sbox3 = 8'h55; + 8'hee: tmp_new_sbox3 = 8'h28; + 8'hef: tmp_new_sbox3 = 8'hdf; + 8'hf0: tmp_new_sbox3 = 8'h8c; + 8'hf1: tmp_new_sbox3 = 8'ha1; + 8'hf2: tmp_new_sbox3 = 8'h89; + 8'hf3: tmp_new_sbox3 = 8'h0d; + 8'hf4: tmp_new_sbox3 = 8'hbf; + 8'hf5: tmp_new_sbox3 = 8'he6; + 8'hf6: tmp_new_sbox3 = 8'h42; + 8'hf7: tmp_new_sbox3 = 8'h68; + 8'hf8: tmp_new_sbox3 = 8'h41; + 8'hf9: tmp_new_sbox3 = 8'h99; + 8'hfa: tmp_new_sbox3 = 8'h2d; + 8'hfb: tmp_new_sbox3 = 8'h0f; + 8'hfc: tmp_new_sbox3 = 8'hb0; + 8'hfd: tmp_new_sbox3 = 8'h54; + 8'hfe: tmp_new_sbox3 = 8'hbb; + 8'hff: tmp_new_sbox3 = 8'h16; + endcase // case (sboxw[7 : 0]) + end // sbox_rom3 + +endmodule // aes_sbox + +//====================================================================== +// EOF aes_sbox.v +//====================================================================== |