54 lines
1.3 KiB
JavaScript
54 lines
1.3 KiB
JavaScript
/**
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* CSPRNG Fisher-Yates shuffle.
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*
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* Only works on lists up to 255 elements.
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*/
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function cryptoShuffle(l) {
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let out = [];
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for (let i = l.length - 1; i > 0; i--) {
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let value = new Uint8Array([0]);
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crypto.getRandomValues(value);
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while (value[0] > i) {
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crypto.getRandomValues(value);
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}
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let v = l.splice(value[0], 1);
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out.push(v[0]);
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}
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out.push(l[0]);
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return out;
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}
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window.cryptoShuffle = cryptoShuffle;
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function proveRegions(regions) {
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// Construct prover coins
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let coins = [];
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let regionNames = Object.keys(regions);
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for (let x = 0; x < 40; x++) {
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let psi = cryptoShuffle(structuredClone(regionNames)).join("");
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let newRegions = structuredClone(regions);
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// rearrange keys
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for (let index = 0; index < regionNames.length; index++) {
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let c = regions[psi[index]].clone();
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// re-blind
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c.update(c.pubKey.encrypt(0n));
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newRegions[regionNames[index]] = c.toString();
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}
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coins.push(newRegions);
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}
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// Construct verifier coins
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let hasher = new jsSHA("SHA3-256", "TEXT");
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hasher.update(JSON.stringify(coins));
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console.log(hasher.getHash("UINT8ARRAY"));
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// Construct prover proofs
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}
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window.proveRegions = proveRegions;
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