libjava/java/security/Signer.java

   1 /* Signer.java --- Signer Class
   2    Copyright (C) 1999 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package java.security;
  39
  40 /**
  41    Signer is a subclass used to store a digital signature key with
  42    an Identity.
  43
  44    @author Mark Benvenuto <ivymccough@worldnet.att.net>
  45
  46    @since JDK 1.1
  47  */
  48 public abstract class Signer extends Identity
  49 {
  50   private PrivateKey privateKey = null;
  51
  52   /**
  53      Constructs a new Signer.
  54    */
  55   protected Signer()
  56   {
  57   }
  58
  59   /**
  60      Constructs a new Signer with the specified name.
  61
  62      @param name the name of the identity.
  63    */
  64   public Signer(String name)
  65   {
  66     super(name);
  67   }
  68
  69   /**
  70      Constructs a new Signer with the specifid name and
  71      IdentityScope.
  72
  73      @param name the name of the identity.
  74      @scope the IdentityScope to use
  75
  76      @throws KeyManagementException if duplicate identity name
  77      within scope
  78    */
  79   public Signer(String name, IdentityScope scope)
  80     throws KeyManagementException
  81   {
  82     super(name, scope);
  83   }
  84
  85   /**
  86      Returns the private key for this signer.
  87
  88      This class checks the security manager with the call
  89      checkSecurityAccess with "getSignerPrivateKey".
  90
  91      @returns the private key for the signer
  92
  93      @throws SecurityException - if the security manager denies
  94      access to "getSignerPrivateKey"
  95    */
  96   public PrivateKey getPrivateKey()
  97   {
  98     SecurityManager sm = System.getSecurityManager();
  99     if (sm != null)
 100       sm.checkSecurityAccess("getSignerPrivateKey");
 101
 102     return privateKey;
 103   }
 104
 105   /**
 106      Specifies the KeyPair associated with this Signer.
 107
 108      This class checks the security manager with the call
 109      checkSecurityAccess with "setSignerKeyPair".
 110
 111      @param pair the keyPair
 112
 113      @throws InvalidParameterException invalidly intialized key pair
 114      @throws KeyException another key error
 115      @throws SecurityException - if the security manager denies
 116      access to "getSignerPrivateKey"
 117    */
 118   public final void setKeyPair(KeyPair pair)
 119     throws InvalidParameterException, KeyException
 120   {
 121     SecurityManager sm = System.getSecurityManager();
 122     if (sm != null)
 123       sm.checkSecurityAccess("setSignerKeyPair");
 124
 125     try
 126       {
 127         if (pair.getPublic() != null)
 128           setPublicKey(pair.getPublic());
 129         else
 130           throw new InvalidParameterException();
 131
 132       }
 133     catch (KeyManagementException kme)
 134       {
 135         throw new KeyException();
 136       }
 137
 138     if (pair.getPrivate() != null)
 139         privateKey = pair.getPrivate();
 140     else
 141       throw new InvalidParameterException();
 142   }
 143
 144   /**
 145      Returns a string representing this Signer.
 146
 147      @returns a string representing this Signer.
 148    */
 149   public String toString()
 150   {
 151     return (getName() + ": " + privateKey);
 152   }
 153 }