85 lines
2.1 KiB
TypeScript
85 lines
2.1 KiB
TypeScript
import wasmJson from "../wasm/sha3.wasm.json";
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import {
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type IHasher,
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type IWASMInterface,
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WASMInterface,
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} from "./WASMInterface";
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import lockedCreate from "./lockedCreate";
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import Mutex from "./mutex";
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import type { IDataType } from "./util";
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type IValidBits = 224 | 256 | 384 | 512;
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const mutex = new Mutex();
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let wasmCache: IWASMInterface = null;
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function validateBits(bits: IValidBits) {
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if (![224, 256, 384, 512].includes(bits)) {
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return new Error("Invalid variant! Valid values: 224, 256, 384, 512");
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}
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return null;
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}
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/**
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* Calculates SHA-3 hash
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* @param data Input data (string, Buffer or TypedArray)
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* @param bits Number of output bits. Valid values: 224, 256, 384, 512
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* @returns Computed hash as a hexadecimal string
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*/
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export function sha3(data: IDataType, bits: IValidBits = 512): Promise<string> {
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if (validateBits(bits)) {
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return Promise.reject(validateBits(bits));
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}
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const hashLength = bits / 8;
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if (wasmCache === null || wasmCache.hashLength !== hashLength) {
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return lockedCreate(mutex, wasmJson, hashLength).then((wasm) => {
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wasmCache = wasm;
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return wasmCache.calculate(data, bits, 0x06);
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});
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}
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try {
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const hash = wasmCache.calculate(data, bits, 0x06);
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return Promise.resolve(hash);
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} catch (err) {
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return Promise.reject(err);
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}
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}
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/**
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* Creates a new SHA-3 hash instance
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* @param bits Number of output bits. Valid values: 224, 256, 384, 512
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*/
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export function createSHA3(bits: IValidBits = 512): Promise<IHasher> {
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if (validateBits(bits)) {
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return Promise.reject(validateBits(bits));
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}
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const outputSize = bits / 8;
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return WASMInterface(wasmJson, outputSize).then((wasm) => {
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wasm.init(bits);
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const obj: IHasher = {
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init: () => {
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wasm.init(bits);
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return obj;
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},
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update: (data) => {
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wasm.update(data);
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return obj;
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},
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// biome-ignore lint/suspicious/noExplicitAny: Conflict with IHasher type
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digest: (outputType) => wasm.digest(outputType, 0x06) as any,
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save: () => wasm.save(),
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load: (data) => {
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wasm.load(data);
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return obj;
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},
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blockSize: 200 - 2 * outputSize,
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digestSize: outputSize,
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};
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return obj;
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});
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}
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