52 lines
1.3 KiB
Plaintext
52 lines
1.3 KiB
Plaintext
/*
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Copyright 2018 0KIMS association.
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This file is part of circom (Zero Knowledge Circuit Compiler).
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circom is a free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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circom is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with circom. If not, see <https://www.gnu.org/licenses/>.
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*/
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function pointAdd(x1,y1,x2,y2) {
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var a = 168700;
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var d = 168696;
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var res[2];
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res[0] = (x1*y2 + y1*x2) / (1 + d*x1*x2*y1*y2);
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res[1] = (y1*y2 - a*x1*x2) / (1 - d*x1*x2*y1*y2);
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return res;
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}
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function EscalarMulW4Table(base, k) {
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var out[16][2];
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var i;
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var p[2];
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var dbl = base;
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for (i=0; i<k*4; i++) {
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dbl = pointAdd(dbl[0], dbl[1], dbl[0], dbl[1]);
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}
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out[0][0] = 0;
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out[0][1] = 1;
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for (i=1; i<16; i++) {
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p = pointAdd(out[i-1][0], out[i-1][1], dbl[0], dbl[1]);
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out[i][0] = p[0];
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out[i][1] = p[1];
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}
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return out;
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}
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