82 lines
2.4 KiB
Plaintext
82 lines
2.4 KiB
Plaintext
|
|
|
|
include "constants.circom";
|
|
include "sha256compression.circom";
|
|
|
|
template Sha256(nBits) {
|
|
signal input in[nBits];
|
|
signal output out[256];
|
|
|
|
var i;
|
|
var k;
|
|
var nBlocks;
|
|
var bitsLastBlock;
|
|
|
|
|
|
nBlocks = ((nBits + 64)\512)+1;
|
|
|
|
signal paddedIn[nBlocks*512];
|
|
|
|
for (k=0; k<nBits; k++) {
|
|
paddedIn[k] <== in[k];
|
|
}
|
|
paddedIn[nBits] <== 1;
|
|
|
|
for (k=nBits+1; k<nBlocks*512-64; k++) {
|
|
paddedIn[k] <== 0;
|
|
}
|
|
|
|
for (k = 0; k< 64; k++) {
|
|
paddedIn[nBlocks*512 - k -1] <== (nBits >> k)&1;
|
|
}
|
|
|
|
component ha0 = H(0);
|
|
component hb0 = H(1);
|
|
component hc0 = H(2);
|
|
component hd0 = H(3);
|
|
component he0 = H(4);
|
|
component hf0 = H(5);
|
|
component hg0 = H(6);
|
|
component hh0 = H(7);
|
|
|
|
component sha256compression[nBlocks];
|
|
|
|
for (i=0; i<nBlocks; i++) {
|
|
|
|
sha256compression[i] = Sha256compression() ;
|
|
|
|
if (i==0) {
|
|
for (k=0; k<32; k++ ) {
|
|
sha256compression[i].hin[0*32+k] <== ha0.out[k];
|
|
sha256compression[i].hin[1*32+k] <== hb0.out[k];
|
|
sha256compression[i].hin[2*32+k] <== hc0.out[k];
|
|
sha256compression[i].hin[3*32+k] <== hd0.out[k];
|
|
sha256compression[i].hin[4*32+k] <== he0.out[k];
|
|
sha256compression[i].hin[5*32+k] <== hf0.out[k];
|
|
sha256compression[i].hin[6*32+k] <== hg0.out[k];
|
|
sha256compression[i].hin[7*32+k] <== hh0.out[k];
|
|
}
|
|
} else {
|
|
for (k=0; k<32; k++ ) {
|
|
sha256compression[i].hin[32*0+k] <== sha256compression[i-1].out[32*0+31-k];
|
|
sha256compression[i].hin[32*1+k] <== sha256compression[i-1].out[32*1+31-k];
|
|
sha256compression[i].hin[32*2+k] <== sha256compression[i-1].out[32*2+31-k];
|
|
sha256compression[i].hin[32*3+k] <== sha256compression[i-1].out[32*3+31-k];
|
|
sha256compression[i].hin[32*4+k] <== sha256compression[i-1].out[32*4+31-k];
|
|
sha256compression[i].hin[32*5+k] <== sha256compression[i-1].out[32*5+31-k];
|
|
sha256compression[i].hin[32*6+k] <== sha256compression[i-1].out[32*6+31-k];
|
|
sha256compression[i].hin[32*7+k] <== sha256compression[i-1].out[32*7+31-k];
|
|
}
|
|
}
|
|
|
|
for (k=0; k<512; k++) {
|
|
sha256compression[i].inp[k] <== paddedIn[i*512+k];
|
|
}
|
|
}
|
|
|
|
for (k=0; k<256; k++) {
|
|
out[k] <== sha256compression[nBlocks-1].out[k];
|
|
}
|
|
|
|
}
|