package civitas.crypto.proofvote;
   
   import java.util.LinkedList;
   import java.util.List;
   
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Controller;
   
   import civitas.crypto.ciphertext.ElGamalCiphertextish;
  import civitas.crypto.messagedigest.CryptoHash;
  import civitas.crypto.parameters.ElGamalParameters;
  import civitas.util.CivitasBigInteger;
  import civitas.util.CivitasBigIntegerFactory;
  
  @Controller
  public class CalculateProofEnvironment {
  	@Autowired
  	CryptoHash cryptoHash;
  
  	public List<CivitasBigInteger> apply(
  			final ElGamalParameters params,
  			final ElGamalCiphertextish encCapability,
  			final ElGamalCiphertextish encChoice,
  			final String context) {
  		List<CivitasBigInteger> e = new LinkedList<>();
  		e.add(params.g);
  		e.add(encCapability.getA());
  		e.add(encCapability.getB());
  		e.add(encChoice.getA());
  		e.add(encChoice.getB());
  		e.add(CivitasBigIntegerFactory.obtain(1, cryptoHash.apply(context.getBytes())));
  		return e;
  	}
  }