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poseidon: prohibit sBoxPower other than 3, 5, 7

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Paul Miller 2023-08-08 13:43:14 +00:00
parent 1ef16033fe
commit 08bb00cc8f
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1 changed files with 6 additions and 5 deletions
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11
src/abstract/poseidon.ts
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@ -21,12 +21,13 @@ export function validateOpts(opts: PoseidonOpts) {
if (typeof opts[i] !== 'number' || !Number.isSafeInteger(opts[i])) if (typeof opts[i] !== 'number' || !Number.isSafeInteger(opts[i]))
throw new Error(`Poseidon: invalid param ${i}=${opts[i]} (${typeof opts[i]})`); throw new Error(`Poseidon: invalid param ${i}=${opts[i]} (${typeof opts[i]})`);
} }
if (opts.reversePartialPowIdx !== undefined && typeof opts.reversePartialPowIdx !== 'boolean') const rev = opts.reversePartialPowIdx;
throw new Error(`Poseidon: invalid param reversePartialPowIdx=${opts.reversePartialPowIdx}`); if (rev !== undefined && typeof rev !== 'boolean')
// Default is 5, but by some reasons stark uses 3 throw new Error(`Poseidon: invalid param reversePartialPowIdx=${rev}`);
let sboxPower = opts.sboxPower; // Default is 5, but for some reasons stark uses 3
let { sboxPower } = opts;
if (sboxPower === undefined) sboxPower = 5; if (sboxPower === undefined) sboxPower = 5;
if (typeof sboxPower !== 'number' || !Number.isSafeInteger(sboxPower)) if (!([3, 5, 7].includes(sboxPower)))
throw new Error(`Poseidon wrong sboxPower=${sboxPower}`); throw new Error(`Poseidon wrong sboxPower=${sboxPower}`);
const _sboxPower = BigInt(sboxPower); const _sboxPower = BigInt(sboxPower);