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.crypto.impl;
  
  import java.util.Properties;
  
  import at.o2xfs.common.Hex;
  import at.o2xfs.emv.crypto.CAPublicKey;
  import at.o2xfs.emv.crypto.CAPublicKey.CAPublicKeyBuilder;
  import at.o2xfs.emv.crypto.CertificateNotFoundException;
  import at.o2xfs.emv.crypto.KeyStore;
  import at.o2xfs.emv.crypto.KeyStoreException;
  import at.o2xfs.log.Logger;
  import at.o2xfs.log.LoggerFactory;
  
  class PropertiesKeyStore implements KeyStore {
  
  	private final static Logger LOG = LoggerFactory
  			.getLogger(PropertiesKeyStore.class);
  
  	private final Properties keyStore;
  
  	protected PropertiesKeyStore(Properties keyStore) {
  		this.keyStore = keyStore;
  	}
  
  	private String keyID(byte[] rid, byte[] index) {
  		return Hex.encode(rid) + "_" + Hex.encode(index);
  	}
  
  	@Override
  	public CAPublicKey getCAPublicKey(byte[] rid, byte[] index)
  			throws KeyStoreException {
  		final String method = "getCAPublicKey(byte[], byte[])";
  		if (LOG.isInfoEnabled()) {
  			LOG.info(method, "Get CA for RID: " + Hex.encode(rid)
  					+ ", Public Key Index: " + Hex.encode(index));
  		}
  		String key = keyID(rid, index);
  		String value = keyStore.getProperty(key);
  		if (value == null) {
  			throw new CertificateNotFoundException(rid, index);
  		}
  		CAPublicKeyBuilder builder = new CAPublicKeyBuilder().rid(rid)
  				.publicKeyIndex(index);
  		return parseKey(builder, value);
  	}
  
  	private CAPublicKey parseKey(CAPublicKeyBuilder builder, String value) {
  		String[] parts = value.split("_");
  		builder.modulus(Hex.decode(parts[0]));
  		builder.exponent(Hex.decode(parts[1]));
  		builder.checkSum(Hex.decode(parts[2]));
  		return builder.build();
  
  	}
  
  }