/
shake.ts
51 lines (44 loc) · 1.08 KB
/
shake.ts
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
import { Sponge } from "./sponge.ts";
import { keccakf } from "./keccakf.ts";
/** Shake128 hash */
export class Shake128 extends Sponge {
/**
* Instantiates a new Shake128 hash
* @param bitsize length of hash in bits
*/
constructor(bitsize: number) {
if (bitsize < 8) {
throw new Error("shake128: `bitsize` too small");
}
if (bitsize % 8 !== 0) {
throw new Error("shake128: `bitsize` must be multiple of 8");
}
super({
bitsize: bitsize,
rate: 168,
dsbyte: 0x1f,
permutator: keccakf,
});
}
}
/**
* Instantiates a new Shake256 hash
* @param bitsize length of hash in bits
*/
export class Shake256 extends Sponge {
constructor(bitsize: number) {
if (bitsize < 8) {
throw new Error("shake256: `bitsize` too small");
}
if (bitsize % 8 !== 0) {
throw new Error("shake256: `bitsize` must be multiple of 8");
}
super({
bitsize: bitsize,
rate: 136,
dsbyte: 0x1f,
permutator: keccakf,
});
}
}