126 lines
3.5 KiB
JavaScript
126 lines
3.5 KiB
JavaScript
// Copyright (c) 2018 Jordi Baylina
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// License: LGPL-3.0+
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//
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import ethers from "ethers";
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import Contract from "./evmasm.js";
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export function createCode(seed, n) {
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let ci = ethers.utils.keccak256(ethers.utils.toUtf8Bytes(seed));
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const C = new Contract();
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C.push(0x64);
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C.push("0x00");
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C.push("0x00");
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C.calldatacopy();
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C.push("0x0100000000000000000000000000000000000000000000000000000000");
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C.push("0x00");
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C.mload();
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C.div();
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C.push("0x3f1a1187"); // MiMCSponge(uint256,uint256,uint256)
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C.eq();
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C.jmpi("start");
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C.invalid();
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C.label("start");
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C.push("0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001"); // q
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C.push("0x44");
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C.mload(); // k q
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C.push("0x04");
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C.mload(); // xL k q
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C.dup(2); // q xL k q
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C.push("0x24");
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C.mload(); // xR q xL k q
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C.dup(1); // q xR q xL k q
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C.dup(0); // q q xR q xL k q
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C.dup(4); // xL q q xR q xL k q
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C.dup(6); // k xL q q xR q xL k q
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C.addmod(); // t=k+xL q xR q xL k q
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C.dup(1); // q t q xR q xL k q
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C.dup(0); // q q t q xR q xL k q
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C.dup(2); // t q q t q xR q xL k q
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C.dup(0); // t t q q t q xR q xL k q
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C.mulmod(); // b=t^2 q t q xR q xL k q
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C.dup(0); // b b q t q xR q xL k q
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C.mulmod(); // c=t^4 t q xR q xL k q
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C.mulmod(); // d=t^5 xR q xL k q
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C.addmod(); // e=t^5+xR xL k q (for next round: xL xR k q)
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for (let i=0; i<n-1; i++) {
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if (i < n-2) {
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ci = ethers.utils.keccak256(ci);
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} else {
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ci = "0x00";
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}
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C.swap(1); // xR xL k q
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C.dup(3); // q xR xL k q
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C.dup(3); // k q xR xL k q
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C.dup(1); // q k q xR xL k q
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C.dup(4); // xL q k q xR xL k q
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C.push(ci); // ci xL q k q xR xL k q
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C.addmod(); // a=ci+xL k q xR xL k q
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C.addmod(); // t=a+k xR xL k q
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C.dup(4); // q t xR xL k q
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C.swap(1); // t q xR xL k q
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C.dup(1); // q t q xR xL k q
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C.dup(0); // q q t q xR xL k q
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C.dup(2); // t q q t q xR xL k q
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C.dup(0); // t t q q t q xR xL k q
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C.mulmod(); // b=t^2 q t q xR xL k q
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C.dup(0); // b b q t q xR xL k q
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C.mulmod(); // c=t^4 t q xR xL k q
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C.mulmod(); // d=t^5 xR xL k q
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C.dup(4); // q d xR xL k q
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C.swap(2); // xR d q xL k q
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C.addmod(); // e=t^5+xR xL k q (for next round: xL xR k q)
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}
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C.push("0x20");
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C.mstore(); // Save it to pos 0;
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C.push("0x00");
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C.mstore(); // Save it to pos 1;
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C.push("0x40");
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C.push("0x00");
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C.return();
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return C.createTxData();
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}
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export const abi = [
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{
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"constant": true,
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"inputs": [
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{
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"name": "xL_in",
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"type": "uint256"
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},
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{
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"name": "xR_in",
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"type": "uint256"
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},
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{
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"name": "k",
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"type": "uint256"
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}
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],
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"name": "MiMCSponge",
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"outputs": [
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{
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"name": "xL",
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"type": "uint256"
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},
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{
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"name": "xR",
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"type": "uint256"
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}
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],
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"payable": false,
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"stateMutability": "pure",
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"type": "function"
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}
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];
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