@li0ard/kalyna/dist/utils.js

Kalyna (DSTU 7624:2014) cipher implementation in pure TypeScript

import { bytesToHex, hexToNumber, numberToBytesBE } from "@li0ard/gost3413/dist/utils";
export const bytesToNumberLE = (bytes) => hexToNumber(bytesToHex(bytes.slice().reverse()));
export const numberToBytesLE = (n, len) => numberToBytesBE(n, len).reverse();
export const bytesToUint64s = (b) => {
    const size = Math.floor(b.length / 8);
    const result = new BigUint64Array(size);
    for (let i = 0; i < size; i++)
        result[i] = bytesToNumberLE(b.slice(i * 8, i * 8 + 8));
    return result;
};
export const uint64sToBytes = (w) => {
    const result = new Uint8Array(w.length * 8);
    for (let i = 0; i < w.length; i++)
        result.set(numberToBytesLE(w[i], 8), i * 8);
    return result;
};
export const swap_block = (k, N) => {
    if (N <= 1)
        return;
    const t = k[0];
    for (let i = 0; i < N - 1; i++)
        k[i] = k[i + 1];
    k[N - 1] = t;
};
export const equalBytes = (a, b) => {
    if (a.length !== b.length)
        return false;
    let diff = 0;
    for (let i = 0; i < a.length; i++)
        diff |= a[i] ^ b[i];
    return diff === 0;
};