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Diffstat (limited to 'src/rtl/aes_inv_sbox.v')
| -rw-r--r-- | src/rtl/aes_inv_sbox.v | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/src/rtl/aes_inv_sbox.v b/src/rtl/aes_inv_sbox.v new file mode 100644 index 0000000..807f397 --- /dev/null +++ b/src/rtl/aes_inv_sbox.v @@ -0,0 +1,325 @@ +//====================================================================== +// +// aes_inv_sbox.v +// -------------- +// The inverse AES S-box. Basically a 256 Byte ROM. +// +// +// Author: Joachim Strombergson +// Copyright (c) 2014, NORDUnet A/S +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// - Redistributions of source code must retain the above copyright notice, +// this list of conditions and the following disclaimer. +// +// - 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. +// +// - Neither the name of the NORDUnet nor the names of its contributors may +// be used to endorse or promote products derived from this software +// without specific prior written permission. +// +// 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 +// HOLDER 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 + ); + + + //---------------------------------------------------------------- + // The inverse sbox array. + //---------------------------------------------------------------- + wire [7 : 0] inv_sbox [0 : 255]; + + + //---------------------------------------------------------------- + // Four parallel muxes. + //---------------------------------------------------------------- + assign new_sword[31 : 24] = inv_sbox[sword[31 : 24]]; + assign new_sword[23 : 16] = inv_sbox[sword[23 : 16]]; + assign new_sword[15 : 08] = inv_sbox[sword[15 : 08]]; + assign new_sword[07 : 00] = inv_sbox[sword[07 : 00]]; + + + //---------------------------------------------------------------- + // Creating the contents of the array. + //---------------------------------------------------------------- + assign inv_sbox[8'h00] = 8'h52; + assign inv_sbox[8'h01] = 8'h09; + assign inv_sbox[8'h02] = 8'h6a; + assign inv_sbox[8'h03] = 8'hd5; + assign inv_sbox[8'h04] = 8'h30; + assign inv_sbox[8'h05] = 8'h36; + assign inv_sbox[8'h06] = 8'ha5; + assign inv_sbox[8'h07] = 8'h38; + assign inv_sbox[8'h08] = 8'hbf; + assign inv_sbox[8'h09] = 8'h40; + assign inv_sbox[8'h0a] = 8'ha3; + assign inv_sbox[8'h0b] = 8'h9e; + assign inv_sbox[8'h0c] = 8'h81; + assign inv_sbox[8'h0d] = 8'hf3; + assign inv_sbox[8'h0e] = 8'hd7; + assign inv_sbox[8'h0f] = 8'hfb; + assign inv_sbox[8'h10] = 8'h7c; + assign inv_sbox[8'h11] = 8'he3; + assign inv_sbox[8'h12] = 8'h39; + assign inv_sbox[8'h13] = 8'h82; + assign inv_sbox[8'h14] = 8'h9b; + assign inv_sbox[8'h15] = 8'h2f; + assign inv_sbox[8'h16] = 8'hff; + assign inv_sbox[8'h17] = 8'h87; + assign inv_sbox[8'h18] = 8'h34; + assign inv_sbox[8'h19] = 8'h8e; + assign inv_sbox[8'h1a] = 8'h43; + assign inv_sbox[8'h1b] = 8'h44; + assign inv_sbox[8'h1c] = 8'hc4; + assign inv_sbox[8'h1d] = 8'hde; + assign inv_sbox[8'h1e] = 8'he9; + assign inv_sbox[8'h1f] = 8'hcb; + assign inv_sbox[8'h20] = 8'h54; + assign inv_sbox[8'h21] = 8'h7b; + assign inv_sbox[8'h22] = 8'h94; + assign inv_sbox[8'h23] = 8'h32; + assign inv_sbox[8'h24] = 8'ha6; + assign inv_sbox[8'h25] = 8'hc2; + assign inv_sbox[8'h26] = 8'h23; + assign inv_sbox[8'h27] = 8'h3d; + assign inv_sbox[8'h28] = 8'hee; + assign inv_sbox[8'h29] = 8'h4c; + assign inv_sbox[8'h2a] = 8'h95; + assign inv_sbox[8'h2b] = 8'h0b; + assign inv_sbox[8'h2c] = 8'h42; + assign inv_sbox[8'h2d] = 8'hfa; + assign inv_sbox[8'h2e] = 8'hc3; + assign inv_sbox[8'h2f] = 8'h4e; + assign inv_sbox[8'h30] = 8'h08; + assign inv_sbox[8'h31] = 8'h2e; + assign inv_sbox[8'h32] = 8'ha1; + assign inv_sbox[8'h33] = 8'h66; + assign inv_sbox[8'h34] = 8'h28; + assign inv_sbox[8'h35] = 8'hd9; + assign inv_sbox[8'h36] = 8'h24; + assign inv_sbox[8'h37] = 8'hb2; + assign inv_sbox[8'h38] = 8'h76; + assign inv_sbox[8'h39] = 8'h5b; + assign inv_sbox[8'h3a] = 8'ha2; + assign inv_sbox[8'h3b] = 8'h49; + assign inv_sbox[8'h3c] = 8'h6d; + assign inv_sbox[8'h3d] = 8'h8b; + assign inv_sbox[8'h3e] = 8'hd1; + assign inv_sbox[8'h3f] = 8'h25; + assign inv_sbox[8'h40] = 8'h72; + assign inv_sbox[8'h41] = 8'hf8; + assign inv_sbox[8'h42] = 8'hf6; + assign inv_sbox[8'h43] = 8'h64; + assign inv_sbox[8'h44] = 8'h86; + assign inv_sbox[8'h45] = 8'h68; + assign inv_sbox[8'h46] = 8'h98; + assign inv_sbox[8'h47] = 8'h16; + assign inv_sbox[8'h48] = 8'hd4; + assign inv_sbox[8'h49] = 8'ha4; + assign inv_sbox[8'h4a] = 8'h5c; + assign inv_sbox[8'h4b] = 8'hcc; + assign inv_sbox[8'h4c] = 8'h5d; + assign inv_sbox[8'h4d] = 8'h65; + assign inv_sbox[8'h4e] = 8'hb6; + assign inv_sbox[8'h4f] = 8'h92; + assign inv_sbox[8'h50] = 8'h6c; + assign inv_sbox[8'h51] = 8'h70; + assign inv_sbox[8'h52] = 8'h48; + assign inv_sbox[8'h53] = 8'h50; + assign inv_sbox[8'h54] = 8'hfd; + assign inv_sbox[8'h55] = 8'hed; + assign inv_sbox[8'h56] = 8'hb9; + assign inv_sbox[8'h57] = 8'hda; + assign inv_sbox[8'h58] = 8'h5e; + assign inv_sbox[8'h59] = 8'h15; + assign inv_sbox[8'h5a] = 8'h46; + assign inv_sbox[8'h5b] = 8'h57; + assign inv_sbox[8'h5c] = 8'ha7; + assign inv_sbox[8'h5d] = 8'h8d; + assign inv_sbox[8'h5e] = 8'h9d; + assign inv_sbox[8'h5f] = 8'h84; + assign inv_sbox[8'h60] = 8'h90; + assign inv_sbox[8'h61] = 8'hd8; + assign inv_sbox[8'h62] = 8'hab; + assign inv_sbox[8'h63] = 8'h00; + assign inv_sbox[8'h64] = 8'h8c; + assign inv_sbox[8'h65] = 8'hbc; + assign inv_sbox[8'h66] = 8'hd3; + assign inv_sbox[8'h67] = 8'h0a; + assign inv_sbox[8'h68] = 8'hf7; + assign inv_sbox[8'h69] = 8'he4; + assign inv_sbox[8'h6a] = 8'h58; + assign inv_sbox[8'h6b] = 8'h05; + assign inv_sbox[8'h6c] = 8'hb8; + assign inv_sbox[8'h6d] = 8'hb3; + assign inv_sbox[8'h6e] = 8'h45; + assign inv_sbox[8'h6f] = 8'h06; + assign inv_sbox[8'h70] = 8'hd0; + assign inv_sbox[8'h71] = 8'h2c; + assign inv_sbox[8'h72] = 8'h1e; + assign inv_sbox[8'h73] = 8'h8f; + assign inv_sbox[8'h74] = 8'hca; + assign inv_sbox[8'h75] = 8'h3f; + assign inv_sbox[8'h76] = 8'h0f; + assign inv_sbox[8'h77] = 8'h02; + assign inv_sbox[8'h78] = 8'hc1; + assign inv_sbox[8'h79] = 8'haf; + assign inv_sbox[8'h7a] = 8'hbd; + assign inv_sbox[8'h7b] = 8'h03; + assign inv_sbox[8'h7c] = 8'h01; + assign inv_sbox[8'h7d] = 8'h13; + assign inv_sbox[8'h7e] = 8'h8a; + assign inv_sbox[8'h7f] = 8'h6b; + assign inv_sbox[8'h80] = 8'h3a; + assign inv_sbox[8'h81] = 8'h91; + assign inv_sbox[8'h82] = 8'h11; + assign inv_sbox[8'h83] = 8'h41; + assign inv_sbox[8'h84] = 8'h4f; + assign inv_sbox[8'h85] = 8'h67; + assign inv_sbox[8'h86] = 8'hdc; + assign inv_sbox[8'h87] = 8'hea; + assign inv_sbox[8'h88] = 8'h97; + assign inv_sbox[8'h89] = 8'hf2; + assign inv_sbox[8'h8a] = 8'hcf; + assign inv_sbox[8'h8b] = 8'hce; + assign inv_sbox[8'h8c] = 8'hf0; + assign inv_sbox[8'h8d] = 8'hb4; + assign inv_sbox[8'h8e] = 8'he6; + assign inv_sbox[8'h8f] = 8'h73; + assign inv_sbox[8'h90] = 8'h96; + assign inv_sbox[8'h91] = 8'hac; + assign inv_sbox[8'h92] = 8'h74; + assign inv_sbox[8'h93] = 8'h22; + assign inv_sbox[8'h94] = 8'he7; + assign inv_sbox[8'h95] = 8'had; + assign inv_sbox[8'h96] = 8'h35; + assign inv_sbox[8'h97] = 8'h85; + assign inv_sbox[8'h98] = 8'he2; + assign inv_sbox[8'h99] = 8'hf9; + assign inv_sbox[8'h9a] = 8'h37; + assign inv_sbox[8'h9b] = 8'he8; + assign inv_sbox[8'h9c] = 8'h1c; + assign inv_sbox[8'h9d] = 8'h75; + assign inv_sbox[8'h9e] = 8'hdf; + assign inv_sbox[8'h9f] = 8'h6e; + assign inv_sbox[8'ha0] = 8'h47; + assign inv_sbox[8'ha1] = 8'hf1; + assign inv_sbox[8'ha2] = 8'h1a; + assign inv_sbox[8'ha3] = 8'h71; + assign inv_sbox[8'ha4] = 8'h1d; + assign inv_sbox[8'ha5] = 8'h29; + assign inv_sbox[8'ha6] = 8'hc5; + assign inv_sbox[8'ha7] = 8'h89; + assign inv_sbox[8'ha8] = 8'h6f; + assign inv_sbox[8'ha9] = 8'hb7; + assign inv_sbox[8'haa] = 8'h62; + assign inv_sbox[8'hab] = 8'h0e; + assign inv_sbox[8'hac] = 8'haa; + assign inv_sbox[8'had] = 8'h18; + assign inv_sbox[8'hae] = 8'hbe; + assign inv_sbox[8'haf] = 8'h1b; + assign inv_sbox[8'hb0] = 8'hfc; + assign inv_sbox[8'hb1] = 8'h56; + assign inv_sbox[8'hb2] = 8'h3e; + assign inv_sbox[8'hb3] = 8'h4b; + assign inv_sbox[8'hb4] = 8'hc6; + assign inv_sbox[8'hb5] = 8'hd2; + assign inv_sbox[8'hb6] = 8'h79; + assign inv_sbox[8'hb7] = 8'h20; + assign inv_sbox[8'hb8] = 8'h9a; + assign inv_sbox[8'hb9] = 8'hdb; + assign inv_sbox[8'hba] = 8'hc0; + assign inv_sbox[8'hbb] = 8'hfe; + assign inv_sbox[8'hbc] = 8'h78; + assign inv_sbox[8'hbd] = 8'hcd; + assign inv_sbox[8'hbe] = 8'h5a; + assign inv_sbox[8'hbf] = 8'hf4; + assign inv_sbox[8'hc0] = 8'h1f; + assign inv_sbox[8'hc1] = 8'hdd; + assign inv_sbox[8'hc2] = 8'ha8; + assign inv_sbox[8'hc3] = 8'h33; + assign inv_sbox[8'hc4] = 8'h88; + assign inv_sbox[8'hc5] = 8'h07; + assign inv_sbox[8'hc6] = 8'hc7; + assign inv_sbox[8'hc7] = 8'h31; + assign inv_sbox[8'hc8] = 8'hb1; + assign inv_sbox[8'hc9] = 8'h12; + assign inv_sbox[8'hca] = 8'h10; + assign inv_sbox[8'hcb] = 8'h59; + assign inv_sbox[8'hcc] = 8'h27; + assign inv_sbox[8'hcd] = 8'h80; + assign inv_sbox[8'hce] = 8'hec; + assign inv_sbox[8'hcf] = 8'h5f; + assign inv_sbox[8'hd0] = 8'h60; + assign inv_sbox[8'hd1] = 8'h51; + assign inv_sbox[8'hd2] = 8'h7f; + assign inv_sbox[8'hd3] = 8'ha9; + assign inv_sbox[8'hd4] = 8'h19; + assign inv_sbox[8'hd5] = 8'hb5; + assign inv_sbox[8'hd6] = 8'h4a; + assign inv_sbox[8'hd7] = 8'h0d; + assign inv_sbox[8'hd8] = 8'h2d; + assign inv_sbox[8'hd9] = 8'he5; + assign inv_sbox[8'hda] = 8'h7a; + assign inv_sbox[8'hdb] = 8'h9f; + assign inv_sbox[8'hdc] = 8'h93; + assign inv_sbox[8'hdd] = 8'hc9; + assign inv_sbox[8'hde] = 8'h9c; + assign inv_sbox[8'hdf] = 8'hef; + assign inv_sbox[8'he0] = 8'ha0; + assign inv_sbox[8'he1] = 8'he0; + assign inv_sbox[8'he2] = 8'h3b; + assign inv_sbox[8'he3] = 8'h4d; + assign inv_sbox[8'he4] = 8'hae; + assign inv_sbox[8'he5] = 8'h2a; + assign inv_sbox[8'he6] = 8'hf5; + assign inv_sbox[8'he7] = 8'hb0; + assign inv_sbox[8'he8] = 8'hc8; + assign inv_sbox[8'he9] = 8'heb; + assign inv_sbox[8'hea] = 8'hbb; + assign inv_sbox[8'heb] = 8'h3c; + assign inv_sbox[8'hec] = 8'h83; + assign inv_sbox[8'hed] = 8'h53; + assign inv_sbox[8'hee] = 8'h99; + assign inv_sbox[8'hef] = 8'h61; + assign inv_sbox[8'hf0] = 8'h17; + assign inv_sbox[8'hf1] = 8'h2b; + assign inv_sbox[8'hf2] = 8'h04; + assign inv_sbox[8'hf3] = 8'h7e; + assign inv_sbox[8'hf4] = 8'hba; + assign inv_sbox[8'hf5] = 8'h77; + assign inv_sbox[8'hf6] = 8'hd6; + assign inv_sbox[8'hf7] = 8'h26; + assign inv_sbox[8'hf8] = 8'he1; + assign inv_sbox[8'hf9] = 8'h69; + assign inv_sbox[8'hfa] = 8'h14; + assign inv_sbox[8'hfb] = 8'h63; + assign inv_sbox[8'hfc] = 8'h55; + assign inv_sbox[8'hfd] = 8'h21; + assign inv_sbox[8'hfe] = 8'h0c; + assign inv_sbox[8'hff] = 8'h7d; + +endmodule // aes_inv_sbox + +//====================================================================== +// EOF aes_inv_sbox.v +//====================================================================== |