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diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/data/IssuerAndSerial.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/data/IssuerAndSerial.java
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+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/data/IssuerAndSerial.java
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+/*
+ * Copyright 2003 Federal Chancellery Austria
+ * MOA-ID has been developed in a cooperation between BRZ, the Federal
+ * Chancellery Austria - ICT staff unit, and Graz University of Technology.
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://www.osor.eu/eupl/
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ *
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ */
+
+
+package at.gv.egovernment.moa.id.data;
+
+import java.math.BigInteger;
+import java.security.Principal;
+
+import iaik.asn1.structures.Name;
+import iaik.utils.RFC2253NameParser;
+import iaik.utils.RFC2253NameParserException;
+
+/**
+ * A class containing the issuer and serial number of a certificate, which can
+ * be used to uniquely identify the certificate.
+ * 
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class IssuerAndSerial {
+  /** store the issuer as String*/
+  private String issuerDN;
+  /** store the serial as BigInteger*/  
+  private BigInteger serial;
+
+  /**
+   * Create an <code>IssuerAndSerial</code> object.
+   * 
+   * The name of the issuer is converted to RFC2253. If it cannot be parsed, the
+   * DN contained in the <code>issuer</code> is set. 
+   * 
+   * @param issuer The isser of a certificate.
+   * @param serial The serial number of the certificate.
+   */
+  public IssuerAndSerial(Principal issuer, BigInteger serial) {
+    RFC2253NameParser parser = new RFC2253NameParser(issuer.getName());
+
+    try {
+      this.issuerDN = ((Name) parser.parse()).getRFC2253String();
+    } catch (RFC2253NameParserException e) {
+      this.issuerDN = issuer.getName();
+    }
+    this.serial = serial;
+  }
+  
+  /**
+   * Create an <code>IssuerAndSerial</code> object.
+   * 
+   * @param issuerDN The issuer distinguished name. Should be an RFC2253 name.
+   * @param serial The serial number of the certificate.
+   */
+  public IssuerAndSerial(String issuerDN, BigInteger serial) {
+    this.issuerDN = issuerDN;
+    this.serial = serial;
+  }
+
+  /**
+   * Return the issuer DN in RFC2253 format.
+   * 
+   * @return The issuer part of this object.
+   */
+  public String getIssuerDN() {
+    return issuerDN;
+  }
+
+  /**
+   * Return the serial number.
+   * 
+   * @return The serial number of this object.
+   */
+  public BigInteger getSerial() {
+    return serial;
+  }
+
+  /**
+   * Compare this <code>IssuerAndSerial</code> to another object.
+   * 
+   * @return <code>true</code>, if <code>other</code> is an
+   * <code>IssuerAndSerial</code> object and the <code>issuer</code> and
+   * <code>serial</code> fields are both equal. <code>false</code> otherwise.
+   * @see java.lang.Object#equals(java.lang.Object)
+   */
+  public boolean equals(Object other) {
+    if (other instanceof IssuerAndSerial) {
+      IssuerAndSerial ias = (IssuerAndSerial) other;
+      return getIssuerDN().equals(ias.getIssuerDN())
+        && getSerial().equals(ias.getSerial());
+    }
+    return false;
+  }
+
+  /**
+   * Return the hash code of this <code>IssuerAndSerial</code>.
+   * 
+   * @return The hash code of this <code>IssuerAndSerial</code>.
+   * @see java.lang.Object#hashCode()
+   */
+  public int hashCode() {
+    return issuerDN.hashCode() ^ serial.hashCode();
+  }
+
+  /**
+   * Return a <code>String</code> representation of this
+   * <code>IssuerAndSerial</code> object.
+   * 
+   * @return The <code>String</code> representation.
+   * @see java.lang.Object#toString()
+   */
+  public String toString() {
+    return ("(IssuerAndSerial - Issuer<" + getIssuerDN())
+      + ("> Serial<" + serial.toString() + ">)");
+  }
+
+}