package org.jboss.resteasy.security.doseta;

import org.jboss.resteasy.spi.ResteasyConfiguration;

import javax.ws.rs.core.Context;
import java.security.PrivateKey;
import java.security.PublicKey;

/**
 * For use when you want repository created via a context object, i.e., when defined within a WAR file.
 * <p>
 * For WAR files, it will look in context parameters and servlet/filter init params for doseta variables.
 * <p>
 * Private keys are stored in a java keystore.  Public keys may be stored in either a java keystore or discovered via
 * DNS.
 *
 * @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
 * @version $Revision: 1 $
 */
public class ConfiguredDosetaKeyRepository implements KeyRepository
{
   /**
    * Context parameter.
    * <p>
    * Hardcoded file path to your keystore
    */
   public static String RESTEASY_KEY_STORE_FILE_NAME = "resteasy.doseta.keystore.filename";

   /**
    * Context parameter.
    * <p>
    * Find the java keystore by searching the classpath.  This points to a file on the classpath
    */
   public static String RESTEASY_KEY_STORE_CLASSPATH = "resteasy.doseta.keystore.classpath";

   /**
    * Context parameter.
    * <p>
    * Password of the java keystore.
    */
   public static String RESTEASY_KEY_STORE_PASSWORD = "resteasy.doseta.keystore.password";

   /**
    * Context parameter.
    * <p>
    * true|false.  Whether or not to use DNS to discover public keys.  By default looks in keystore
    */
   public static String RESTEASY_DOSETA_USE_DNS = "resteasy.doseta.use.dns";

   /**
    * Context parameter.
    * <p>
    * If you need to retrieve from a specific DNS server specify the url
    * <p>
    * dns://hostname:port
    */
   public static String RESTEASY_DOSETA_DNS_URI = "resteasy.doseta.dns.uri";

   /**
    * Context parameter.
    * <p>
    * When signing, if no domain is specified, use this domain.
    */
   public static String RESTEASY_DOSETA_DEFAULT_PRIVATE_DOMAIN = "resteasy.doseta.default.private.domain";

   /**
    * Public keys are cached.  Specify a timeout for these keys.
    */
   public static String RESTEASY_DOSETA_CACHE_TIMEOUT = "resteasy.doseta.cache.timeout";

   /**
    * true|false.  When signing, if no selector is specified, use the user principal as the selector value.
    */
   public static String RESTEASY_DOSETA_PRINCIPAL_FOR_PRIVATE = "resteasy.doseta.principal.for.private";

   protected DosetaKeyRepository keyRepository = new DosetaKeyRepository();

   private static String getVariable(ResteasyConfiguration config, String name)
   {
      String variable = config.getParameter(name);
      if (variable != null) variable = variable.trim();
      return variable;
   }

   public ConfiguredDosetaKeyRepository(final @Context ResteasyConfiguration config)
   {
      String password = getVariable(config, RESTEASY_KEY_STORE_PASSWORD);
      keyRepository.setKeyStorePassword(password);

      String keyStoreFileName = getVariable(config, RESTEASY_KEY_STORE_FILE_NAME);
      keyRepository.setKeyStoreFile(keyStoreFileName);

      String keyStorePath = getVariable(config, RESTEASY_KEY_STORE_CLASSPATH);
      keyRepository.setKeyStorePath(keyStorePath);


      String principal = getVariable(config, RESTEASY_DOSETA_PRINCIPAL_FOR_PRIVATE);
      if (principal != null)
      {
         keyRepository.setUserPrincipalAsPrivateSelector(Boolean.parseBoolean(principal));
      }

      String useDns = getVariable(config, RESTEASY_DOSETA_USE_DNS);
      if (useDns != null)
      {
         keyRepository.setUseDns(Boolean.parseBoolean(useDns));
      }

      String dnsUri = getVariable(config, RESTEASY_DOSETA_DNS_URI);
      if (dnsUri != null)
      {
         keyRepository.setDnsUri(dnsUri.trim());
      }

      String defaultDomain = getVariable(config, RESTEASY_DOSETA_DEFAULT_PRIVATE_DOMAIN);
      keyRepository.setDefaultPrivateDomain(defaultDomain);

      String timeout = getVariable(config, RESTEASY_DOSETA_CACHE_TIMEOUT);
      if (timeout != null)
      {
         keyRepository.setCacheTimeout(Long.parseLong(timeout.trim()));
      }

      keyRepository.start();


   }

   public PrivateKey findPrivateKey(DKIMSignature header)
   {
      return keyRepository.findPrivateKey(header);
   }

   public PublicKey findPublicKey(DKIMSignature header)
   {
      return keyRepository.findPublicKey(header);
   }

   public String getDefaultPrivateSelector()
   {
      return keyRepository.getDefaultPrivateSelector();
   }

   public String getDefaultPrivateDomain()
   {
      return keyRepository.getDefaultPrivateDomain();
   }
}
