@libn/nchf

Non-cryptographic hash functions.

oaat

32-bit seeded hash.

import { oaat32 } from "@libn/nchf/oaat";

oaat32(new Uint8Array([0, 1, 2, 3]), 0); // e7d12840
oaat32(new Uint8Array([0, 1, 2, 3]), 1); // 80ea5ab8
oaat32(new Uint8Array([0, 1, 2, 4]), 0); // 9080e04c

a5hash

32-bit and 64-bit seeded hashes.

import { a5hash32, a5hash64 } from "@libn/nchf/a5hash";

a5hash32(new Uint8Array([0, 1, 2, 3]), 0); // 5c78d6a6
a5hash32(new Uint8Array([0, 1, 2, 3]), 1); // 97c63c95
a5hash32(new Uint8Array([0, 1, 2, 4]), 0); // d252f967

a5hash64(new Uint8Array([0, 1, 2, 3]), 0n); // 72585f77d63bbd56
a5hash64(new Uint8Array([0, 1, 2, 3]), 1n); // 7b8fd954a91ba3ed
a5hash64(new Uint8Array([0, 1, 2, 4]), 0n); // c6ab2ffce1a74b56

halfsiphash

32-bit and 64-bit keyed hashes.

import { halfsiphash32, halfsiphash64 } from "@libn/nchf/halfsiphash";

const key0 = new Uint8Array(8);
const key1 = key0.with(0, 1);
halfsiphash32(new Uint8Array([0, 1, 2, 3]), key0); // abeeaa6d
halfsiphash32(new Uint8Array([0, 1, 2, 3]), key1); // f167aa09
halfsiphash32(new Uint8Array([0, 1, 2, 4]), key0); // 26affe00

halfsiphash64(new Uint8Array([0, 1, 2, 3]), key0); // 5ad7d3cf8dcbf2b9
halfsiphash64(new Uint8Array([0, 1, 2, 3]), key1); // a2c6ee6ab51b12fa
halfsiphash64(new Uint8Array([0, 1, 2, 4]), key0); // 6dbe762a1eb369ba