Function generateChaCha20

src/utils/random/chacha20.ts:29–49

(dst: Uint32Array, state: Uint32Array)

	x[d] = vd;
}
function generateChaCha20(dst: Uint32Array, state: Uint32Array) : void {
	if (dst.length < 16 || state.length < 16) return;
	dst.set(state);
	for (let i = 0; i < CHACHA_ROUNDS; i += 2) {
		quarterRound(dst, 0, 4, 8, 12);
		quarterRound(dst, 1, 5, 9, 13);
		quarterRound(dst, 2, 6, 10, 14);
		quarterRound(dst, 3, 7, 11, 15);
		quarterRound(dst, 0, 5, 10, 15);
		quarterRound(dst, 1, 6, 11, 12);
		quarterRound(dst, 2, 7, 8, 13);
		quarterRound(dst, 3, 4, 9, 14);
	}
	for (let i = 0; i < 16; i++) {
		let d = dst[i];
		const s = state[i];
		if (d === undefined || s === undefined) throw new Error('generateChaCha20: Something went wrong!');
		d = (d + s) | 0;
		dst[i] = d;
	}
}
export class ChaCha20 extends RandomBase {
	private keynonce: Uint32Array;
	private state: Uint32Array;