Source for java.security.cert.PolicyQualifierInfo

   1: /* PolicyQualifierInfo.java -- policy qualifier info object.
   2:    Copyright (C) 2003, 2004  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., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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: 
  39: package java.security.cert;
  40: 
  41: import gnu.java.io.ASN1ParsingException;
  42: import gnu.java.security.OID;
  43: import gnu.java.security.der.DERReader;
  44: import gnu.java.security.der.DERValue;
  45: 
  46: import java.io.ByteArrayInputStream;
  47: import java.io.IOException;
  48: 
  49: /**
  50:  * The PolicyQualifierInfo X.509 certificate extension.
  51:  * PolicyQualifierInfo objects are represented by the ASN.1 structure:
  52:  *
  53:  * <pre>
  54:  * PolicyQualifierInfo ::= SEQUENCE {
  55:  *    policyQualifierId   PolicyQualifierId,
  56:  *    qualifier           ANY DEFINED BY policyQualifierId
  57:  * }
  58:  *
  59:  * PolicyQualifierId ::= OBJECT IDENTIFIER
  60:  * </pre>
  61:  *
  62:  * @since 1.4
  63:  * @specnote this class was final in 1.4, but beginning with 1.5 is not
  64:  */
  65: public class PolicyQualifierInfo
  66: {
  67: 
  68:   // Fields.
  69:   // ------------------------------------------------------------------------
  70: 
  71:   /** The <code>policyQualifierId</code> field. */
  72:   private OID oid;
  73: 
  74:   /** The DER encoded form of this object. */
  75:   private byte[] encoded;
  76: 
  77:   /** The DER encoded form of the <code>qualifier</code> field. */
  78:   private DERValue qualifier;
  79: 
  80:   // Constructor.
  81:   // ------------------------------------------------------------------------
  82: 
  83:   /**
  84:    * Create a new PolicyQualifierInfo object from the DER encoded form
  85:    * passed in the byte array. The argument is copied.
  86:    *
  87:    * <p>The ASN.1 form of PolicyQualifierInfo is:
  88: <pre>
  89: PolicyQualifierInfo ::= SEQUENCE {
  90:    policyQualifierId     PolicyQualifierId,
  91:    qualifier             ANY DEFINED BY policyQualifierId
  92: }
  93: 
  94: PolicyQualifierId ::= OBJECT IDENTIFIER
  95: </pre>
  96:    *
  97:    * @param encoded The DER encoded form.
  98:    * @throws IOException If the structure cannot be parsed from the
  99:    *         encoded bytes.
 100:    */
 101:   public PolicyQualifierInfo(byte[] encoded) throws IOException
 102:   {
 103:     if (encoded == null)
 104:       throw new IOException("null bytes");
 105:     this.encoded = (byte[]) encoded.clone();
 106:     DERReader in = new DERReader(new ByteArrayInputStream(this.encoded));
 107:     DERValue qualInfo = in.read();
 108:     if (!qualInfo.isConstructed())
 109:       throw new ASN1ParsingException("malformed PolicyQualifierInfo");
 110:     DERValue val = in.read();
 111:     if (!(val.getValue() instanceof OID))
 112:       throw new ASN1ParsingException("value read not an OBJECT IDENTIFIER");
 113:     oid = (OID) val.getValue();
 114:     if (val.getEncodedLength() < val.getLength())
 115:       qualifier = in.read();
 116:   }
 117: 
 118:   // Instance methods.
 119:   // ------------------------------------------------------------------------
 120: 
 121:   /**
 122:    * Returns the <code>policyQualifierId</code> field of this structure,
 123:    * as a dotted-decimal representation of the object identifier.
 124:    *
 125:    * @return This structure's OID field.
 126:    */
 127:   public String getPolicyQualifierId()
 128:   {
 129:     return oid.toString();
 130:   }
 131: 
 132:   /**
 133:    * Returns the DER encoded form of this object; the contents of the
 134:    * returned byte array are equivalent to those that were passed to the
 135:    * constructor. The byte array is cloned every time this method is
 136:    * called.
 137:    *
 138:    * @return The encoded form.
 139:    */
 140:   public byte[] getEncoded()
 141:   {
 142:     return (byte[]) encoded.clone();
 143:   }
 144: 
 145:   /**
 146:    * Get the <code>qualifier</code> field of this object, as a DER
 147:    * encoded byte array. The byte array returned is cloned every time
 148:    * this method is called.
 149:    *
 150:    * @return The encoded qualifier.
 151:    */
 152:   public byte[] getPolicyQualifier()
 153:   {
 154:     if (qualifier == null)
 155:       return new byte[0];
 156:     return qualifier.getEncoded();
 157:   }
 158: 
 159:   /**
 160:    * Returns a printable string representation of this object.
 161:    *
 162:    * @return The string representation.
 163:    */
 164:   public String toString()
 165:   {
 166:     return "PolicyQualifierInfo { policyQualifierId ::= " + oid
 167:       + ", qualifier ::= " + qualifier + " }";
 168:   }
 169: }