Method init

modules/crypt/etc/gcm.js:51–66

(iv, aad)

		this.zero = new ArrayBuffer(this.block.blockSize);
	};
	init(iv, aad) {
		let h = this.block.encrypt(this.zero);
		this.ghash = new GHASH(h, aad);
		if (iv.byteLength == 12) {
			iv = iv.concat(one);
		}
		else {
			let ghash = new GHASH(h);
			iv = ghash.process(iv);
		}
		this.y0 = iv;
		// start with y1
		let y1 = BigInt.fromArrayBuffer(iv);
		y1++;
		this.ctr.setIV(ArrayBuffer.fromBigInt(y1));
	}
	encrypt(data, buf) {
		buf = this.ctr.encrypt(data, buf);
		this.ghash.update(buf);