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libjava/classpath/java/security/cert/PolicyQualifierInfo.java
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libjava/classpath/java/security/cert/PolicyQualifierInfo.java
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/* PolicyQualifierInfo.java -- policy qualifier info object.
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Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.security.cert;
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import gnu.java.io.ASN1ParsingException;
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import gnu.java.security.OID;
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import gnu.java.security.der.DERReader;
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import gnu.java.security.der.DERValue;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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/**
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* The PolicyQualifierInfo X.509 certificate extension.
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* PolicyQualifierInfo objects are represented by the ASN.1 structure:
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*
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* <pre>
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* PolicyQualifierInfo ::= SEQUENCE {
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* policyQualifierId PolicyQualifierId,
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* qualifier ANY DEFINED BY policyQualifierId
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* }
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*
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* PolicyQualifierId ::= OBJECT IDENTIFIER
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* </pre>
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*
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* @since JDK 1.4
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*/
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public final class PolicyQualifierInfo
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{
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// Fields.
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// ------------------------------------------------------------------------
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/** The <code>policyQualifierId</code> field. */
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private OID oid;
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/** The DER encoded form of this object. */
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private byte[] encoded;
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/** The DER encoded form of the <code>qualifier</code> field. */
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private DERValue qualifier;
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// Constructor.
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// ------------------------------------------------------------------------
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/**
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* Create a new PolicyQualifierInfo object from the DER encoded form
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* passed in the byte array. The argument is copied.
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*
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* <p>The ASN.1 form of PolicyQualifierInfo is:
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<pre>
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PolicyQualifierInfo ::= SEQUENCE {
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policyQualifierId PolicyQualifierId,
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qualifier ANY DEFINED BY policyQualifierId
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}
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PolicyQualifierId ::= OBJECT IDENTIFIER
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</pre>
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*
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* @param encoded The DER encoded form.
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* @throws IOException If the structure cannot be parsed from the
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* encoded bytes.
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*/
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public PolicyQualifierInfo(byte[] encoded) throws IOException
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{
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if (encoded == null)
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throw new IOException("null bytes");
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this.encoded = (byte[]) encoded.clone();
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DERReader in = new DERReader(new ByteArrayInputStream(this.encoded));
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DERValue qualInfo = in.read();
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if (!qualInfo.isConstructed())
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throw new ASN1ParsingException("malformed PolicyQualifierInfo");
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DERValue val = in.read();
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if (!(val.getValue() instanceof OID))
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throw new ASN1ParsingException("value read not an OBJECT IDENTIFIER");
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oid = (OID) val.getValue();
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if (val.getEncodedLength() < val.getLength())
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qualifier = in.read();
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}
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// Instance methods.
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// ------------------------------------------------------------------------
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/**
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* Returns the <code>policyQualifierId</code> field of this structure,
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* as a dotted-decimal representation of the object identifier.
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*
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* @return This structure's OID field.
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*/
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public String getPolicyQualifierId()
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{
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return oid.toString();
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}
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/**
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* Returns the DER encoded form of this object; the contents of the
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* returned byte array are equivalent to those that were passed to the
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* constructor. The byte array is cloned every time this method is
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* called.
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*
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* @return The encoded form.
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*/
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public byte[] getEncoded()
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{
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return (byte[]) encoded.clone();
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}
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/**
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* Get the <code>qualifier</code> field of this object, as a DER
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* encoded byte array. The byte array returned is cloned every time
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* this method is called.
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*
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* @return The encoded qualifier.
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*/
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public byte[] getPolicyQualifier()
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{
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if (qualifier == null)
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return new byte[0];
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return qualifier.getEncoded();
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}
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/**
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* Returns a printable string representation of this object.
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*
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* @return The string representation.
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*/
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public String toString()
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{
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return "PolicyQualifierInfo { policyQualifierId ::= " + oid
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+ ", qualifier ::= " + qualifier + " }";
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}
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}
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