import com.subgraph.orchid.crypto.TorKeyAgreement; //导入依赖的package包/类
private CircuitNode receiveAndProcessCreateFastResponse(Router targetRouter, TorKeyAgreement kex) {
	final Cell cell = circuit.receiveControlCellResponse();
	if(cell == null) {
		throw new TorException("Timeout building circuit waiting for CREATE_FAST response from "+ targetRouter);
	}

	return processCreatedFastCell(targetRouter, cell, kex);
}
 

import com.subgraph.orchid.crypto.TorKeyAgreement; //导入依赖的package包/类
private CircuitNode processCreatedFastCell(Router targetRouter, Cell cell, TorKeyAgreement kex) {
	final byte[] payload = new byte[TorMessageDigest.TOR_DIGEST_SIZE * 2];
	final byte[] keyMaterial = new byte[CircuitNodeCryptoState.KEY_MATERIAL_SIZE];
	final byte[] verifyHash = new byte[TorMessageDigest.TOR_DIGEST_SIZE];
	cell.getByteArray(payload);
	if(!kex.deriveKeysFromHandshakeResponse(payload, keyMaterial, verifyHash)) {
		// XXX
		return null;
	}
	final CircuitNode node = CircuitNodeImpl.createFirstHop(targetRouter, keyMaterial, verifyHash);
	circuit.appendNode(node);
	return node;
}