content: /*
   * Copyright (c) 2017, Andreas Fagschlunger. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   - Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   - Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package at.o2xfs.emv.cvm.impl;
  
  import at.o2xfs.emv.EMVTransaction;
  import at.o2xfs.emv.TVR;
  import at.o2xfs.emv.Terminal;
  import at.o2xfs.emv.TerminalCVMCapabilities;
  import at.o2xfs.emv.TerminalCapabilities;
  import at.o2xfs.emv.cvm.CVMResult;
  import at.o2xfs.emv.cvm.PINEnciphermentException;
  import at.o2xfs.emv.pinpad.PINEntryBypassedException;
  import at.o2xfs.emv.pinpad.PINPad;
  import at.o2xfs.emv.pinpad.PINPadException;
  import at.o2xfs.log.Logger;
  import at.o2xfs.log.LoggerFactory;
  
  public class PlaintextPINCVMethod extends OfflinePINCVMethod {
  
  	private static final Logger LOG = LoggerFactory
  			.getLogger(PlaintextPINCVMethod.class);
  
  	@Override
  	public boolean isSupported(EMVTransaction transaction) {
  		Terminal terminal = transaction.getTerminal();
  		TerminalCapabilities tCapabilities = terminal.getTerminalCapabilities();
  		TerminalCVMCapabilities cvmCapabilities = tCapabilities
  				.getCVMCapabilities();
  		return cvmCapabilities.isPlaintextPINForICCVerification();
  	}
  
  	@Override
  	protected CVMResult doPerform() {
  		final String method = "doPerform()";
  		try {
  			checkPINTryCounter();
  			PINPad pinPad = transaction.getPINPad();
  			byte[] pinBlock = pinPad.getPlaintextPIN();
  			checkPlaintextPINBlock(pinBlock);
  			verify(0x80, pinBlock);
  			return CVMResult.SUCCESSFUL;
  		} catch (PINEntryBypassedException e) {
  			if (LOG.isInfoEnabled()) {
  				LOG.info(method, "Plaintext PIN entry has been bypassed", e);
  			}
  			TVR tvr = transaction.getTVR();
  			tvr.getByte3().pinWasNotEntered();
  		} catch (PINPadException e) {
  			if (LOG.isErrorEnabled()) {
  				LOG.error(method, "Error getting plaintext PIN", e);
  			}
  			TVR tvr = transaction.getTVR();
  			tvr.getByte3().pinPadNotPresent();
  		} catch (PINEnciphermentException e) {
  			if (LOG.isErrorEnabled()) {
  				LOG.error(method, "Error verifying plaintext PIN", e);
  			}
  		}
  		return CVMResult.FAILED;
  	}
  
  	private void checkPlaintextPINBlock(byte[] pinBlock) throws PINPadException {
  		if (pinBlock == null) {
  			throw new PINPadException("PIN Block is null");
  		} else if (pinBlock.length != 8) {
  			throw new PINPadException("Illegal PIN Block size: "
  					+ pinBlock.length);
  		}
  	}
  
  }