43 lines
1.1 KiB
JavaScript
43 lines
1.1 KiB
JavaScript
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const chai = require("chai");
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const path = require("path");
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const snarkjs = require("snarkjs");
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const crypto = require("crypto");
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const compiler = require("circom");
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const assert = chai.assert;
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const sha256 = require("./helpers/sha256");
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// const printSignal = require("./helpers/printsignal");
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describe("SHA256 test", () => {
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it("Should calculate a hash", async () => {
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const cirDef = await compiler(path.join(__dirname, "circuits", "sha256_2_test.circom"));
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const circuit = new snarkjs.Circuit(cirDef);
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console.log("Vars: "+circuit.nVars);
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console.log("Constraints: "+circuit.nConstraints);
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const witness = circuit.calculateWitness({ "a": "1", "b": "2" });
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const b = new Buffer.alloc(54);
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b[26] = 1;
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b[53] = 2;
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const hash = crypto.createHash("sha256")
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.update(b)
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.digest("hex");
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const r = "0x" + hash.slice(10);
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const hash2 = sha256.hash(b.toString("hex"), {msgFormat: "hex-bytes"});
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assert.equal(hash, hash2);
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assert(witness[1].equals(snarkjs.bigInt(r)));
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}).timeout(1000000);
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});
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