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/*
Copyright 2018 0KIMS association.
This file is part of circom (Zero Knowledge Circuit Compiler).
circom is a free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
circom is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with circom. If not, see <https://www.gnu.org/licenses/>.
*/
include "sha256compression.circom";
include "../bitify.circom"
template Sha256_2() {
signal input a;
signal input b;
signal output out;
component bits2num = Bits2Num(216);
component num2bits[2];
num2bits[0] = Num2Bits(216);
num2bits[1] = Num2Bits(216);
num2bits[0].in <== a;
num2bits[1].in <== b;
component sha256compression = Sha256compression() ;
var i;
for (i=0; i<216; i++) {
sha256compression.inp[i] <== num2bits[0].out[215-i];
sha256compression.inp[i+216] <== num2bits[1].out[215-i];
}
sha256compression.inp[432] <== 1;
for (i=433; i<503; i++) {
sha256compression.inp[i] <== 0;
}
sha256compression.inp[503] <== 1;
sha256compression.inp[504] <== 1;
sha256compression.inp[505] <== 0;
sha256compression.inp[506] <== 1;
sha256compression.inp[507] <== 1;
sha256compression.inp[508] <== 0;
sha256compression.inp[509] <== 0;
sha256compression.inp[510] <== 0;
sha256compression.inp[511] <== 0;
for (i=0; i<216; i++) {
bits2num.in[i] <== sha256compression.out[255-i];
}
out <== bits2num.out;
}