content: /*
   * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package java.security;
  
  import java.io.*;
  
  /**
   * This class is used to represent an Identity that can also digitally
   * sign data.
   *
   * <p>The management of a signer's private keys is an important and
   * sensitive issue that should be handled by subclasses as appropriate
   * to their intended use.
   *
   * @see Identity
   *
   * @author Benjamin Renaud
   *
   * @deprecated This class is no longer used. Its functionality has been
   * replaced by {@code java.security.KeyStore}, the
   * {@code java.security.cert} package, and
   * {@code java.security.Principal}.
   */
  @Deprecated
  public abstract class Signer extends Identity {
  
      private static final long serialVersionUID = -1763464102261361480L;
  
      /**
       * The signer's private key.
       *
       * @serial
       */
      private PrivateKey privateKey;
  
      /**
       * Creates a signer. This constructor should only be used for
       * serialization.
       */
      protected Signer() {
          super();
      }
  
  
      /**
       * Creates a signer with the specified identity name.
       *
       * @param name the identity name.
       */
      public Signer(String name) {
          super(name);
      }
  
      /**
       * Creates a signer with the specified identity name and scope.
       *
       * @param name the identity name.
       *
       * @param scope the scope of the identity.
       *
       * @exception KeyManagementException if there is already an identity
       * with the same name in the scope.
       */
      public Signer(String name, IdentityScope scope)
      throws KeyManagementException {
          super(name, scope);
      }
  
      /**
       * Returns this signer's private key.
       *
       * <p>First, if there is a security manager, its {@code checkSecurityAccess}
       * method is called with {@code "getSignerPrivateKey"}
       * as its argument to see if it's ok to return the private key.
       *
       * @return this signer's private key, or null if the private key has
       * not yet been set.
       *
       * @exception  SecurityException  if a security manager exists and its
       * {@code checkSecurityAccess} method doesn't allow
       * returning the private key.
       *
       * @see SecurityManager#checkSecurityAccess
       */
      public PrivateKey getPrivateKey() {
          check("getSignerPrivateKey");
          return privateKey;
      }
  
     /**
       * Sets the key pair (public key and private key) for this signer.
       *
       * <p>First, if there is a security manager, its {@code checkSecurityAccess}
       * method is called with {@code "setSignerKeyPair"}
       * as its argument to see if it's ok to set the key pair.
       *
       * @param pair an initialized key pair.
       *
       * @exception InvalidParameterException if the key pair is not
       * properly initialized.
       * @exception KeyException if the key pair cannot be set for any
       * other reason.
       * @exception  SecurityException  if a security manager exists and its
       * {@code checkSecurityAccess} method doesn't allow
       * setting the key pair.
       *
       * @see SecurityManager#checkSecurityAccess
       */
      public final void setKeyPair(KeyPair pair)
      throws InvalidParameterException, KeyException {
          check("setSignerKeyPair");
          final PublicKey pub = pair.getPublic();
          PrivateKey priv = pair.getPrivate();
  
          if (pub == null || priv == null) {
              throw new InvalidParameterException();
          }
          try {
              AccessController.doPrivileged(
                  new PrivilegedExceptionAction<Void>() {
                  public Void run() throws KeyManagementException {
                      setPublicKey(pub);
                      return null;
                  }
              });
          } catch (PrivilegedActionException pae) {
              throw (KeyManagementException) pae.getException();
          }
          privateKey = priv;
      }
  
      String printKeys() {
          String keys = "";
          PublicKey publicKey = getPublicKey();
          if (publicKey != null && privateKey != null) {
              keys = "\tpublic and private keys initialized";
  
          } else {
              keys = "\tno keys";
          }
          return keys;
      }
  
      /**
       * Returns a string of information about the signer.
       *
       * @return a string of information about the signer.
       */
      public String toString() {
          return "[Signer]" + super.toString();
      }
  
      private static void check(String directive) {
          SecurityManager security = System.getSecurityManager();
          if (security != null) {
              security.checkSecurityAccess(directive);
          }
      }
  
  }
  