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//======================================================================
//
// sha256_k_constants.v
// --------------------
// The table K with constants in the SHA-256 hash function.
// A simple combinational ROM basically.
//
//
// 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 sha256_k_constants(
input wire [5 : 0] addr,
output wire [31 : 0] K
);
//----------------------------------------------------------------
// Wires.
//----------------------------------------------------------------
reg [31 : 0] tmp_K;
//----------------------------------------------------------------
// Concurrent connectivity for ports etc.
//----------------------------------------------------------------
assign K = tmp_K;
//----------------------------------------------------------------
// addr_mux
//----------------------------------------------------------------
always @*
begin : addr_mux
case(addr)
00: tmp_K = 32'h428a2f98;
01: tmp_K = 32'h71374491;
02: tmp_K = 32'hb5c0fbcf;
03: tmp_K = 32'he9b5dba5;
04: tmp_K = 32'h3956c25b;
05: tmp_K = 32'h59f111f1;
06: tmp_K = 32'h923f82a4;
07: tmp_K = 32'hab1c5ed5;
08: tmp_K = 32'hd807aa98;
09: tmp_K = 32'h12835b01;
10: tmp_K = 32'h243185be;
11: tmp_K = 32'h550c7dc3;
12: tmp_K = 32'h72be5d74;
13: tmp_K = 32'h80deb1fe;
14: tmp_K = 32'h9bdc06a7;
15: tmp_K = 32'hc19bf174;
16: tmp_K = 32'he49b69c1;
17: tmp_K = 32'hefbe4786;
18: tmp_K = 32'h0fc19dc6;
19: tmp_K = 32'h240ca1cc;
20: tmp_K = 32'h2de92c6f;
21: tmp_K = 32'h4a7484aa;
22: tmp_K = 32'h5cb0a9dc;
23: tmp_K = 32'h76f988da;
24: tmp_K = 32'h983e5152;
25: tmp_K = 32'ha831c66d;
26: tmp_K = 32'hb00327c8;
27: tmp_K = 32'hbf597fc7;
28: tmp_K = 32'hc6e00bf3;
29: tmp_K = 32'hd5a79147;
30: tmp_K = 32'h06ca6351;
31: tmp_K = 32'h14292967;
32: tmp_K = 32'h27b70a85;
33: tmp_K = 32'h2e1b2138;
34: tmp_K = 32'h4d2c6dfc;
35: tmp_K = 32'h53380d13;
36: tmp_K = 32'h650a7354;
37: tmp_K = 32'h766a0abb;
38: tmp_K = 32'h81c2c92e;
39: tmp_K = 32'h92722c85;
40: tmp_K = 32'ha2bfe8a1;
41: tmp_K = 32'ha81a664b;
42: tmp_K = 32'hc24b8b70;
43: tmp_K = 32'hc76c51a3;
44: tmp_K = 32'hd192e819;
45: tmp_K = 32'hd6990624;
46: tmp_K = 32'hf40e3585;
47: tmp_K = 32'h106aa070;
48: tmp_K = 32'h19a4c116;
49: tmp_K = 32'h1e376c08;
50: tmp_K = 32'h2748774c;
51: tmp_K = 32'h34b0bcb5;
52: tmp_K = 32'h391c0cb3;
53: tmp_K = 32'h4ed8aa4a;
54: tmp_K = 32'h5b9cca4f;
55: tmp_K = 32'h682e6ff3;
56: tmp_K = 32'h748f82ee;
57: tmp_K = 32'h78a5636f;
58: tmp_K = 32'h84c87814;
59: tmp_K = 32'h8cc70208;
60: tmp_K = 32'h90befffa;
61: tmp_K = 32'ha4506ceb;
62: tmp_K = 32'hbef9a3f7;
63: tmp_K = 32'hc67178f2;
endcase // case (addr)
end // block: addr_mux
endmodule // sha256_k_constants
//======================================================================
// EOF sha256_k_constants.v
//======================================================================
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