http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
package org.bouncycastle.x509;

import java.io.IOException;
import java.math.BigInteger;
import java.security.cert.CertificateExpiredException;
import java.security.cert.CertificateNotYetValidException;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.Target;
import org.bouncycastle.asn1.x509.TargetInformation;
import org.bouncycastle.asn1.x509.Targets;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.util.Selector;


This class is an Selector like implementation to select
attribute certificates from a given set of criteria.

See Also:
/**
 * This class is an <code>Selector</code> like implementation to select
 * attribute certificates from a given set of criteria.
 * 
 * @see org.bouncycastle.x509.X509AttributeCertificate
 * @see org.bouncycastle.x509.X509Store
 *  @deprecated use org.bouncycastle.cert.X509AttributeCertificateSelector and org.bouncycastle.cert.X509AttributeCertificateSelectorBuilder.
 */
public class X509AttributeCertStoreSelector
    implements Selector
{

    // TODO: name constraints???

    private AttributeCertificateHolder holder;

    private AttributeCertificateIssuer issuer;

    private BigInteger serialNumber;

    private Date attributeCertificateValid;

    private X509AttributeCertificate attributeCert;

    private Collection targetNames = new HashSet();

    private Collection targetGroups = new HashSet();

    public X509AttributeCertStoreSelector()
    {
        super();
    }

    
Decides if the given attribute certificate should be selected.

Params:
  • obj – The attribute certificate which should be checked.
Returns:true if the attribute certificate can be selected,
        false otherwise.
/**
     * Decides if the given attribute certificate should be selected.
     * 
     * @param obj The attribute certificate which should be checked.
     * @return <code>true</code> if the attribute certificate can be selected,
     *         <code>false</code> otherwise.
     */
    public boolean match(Object obj)
    {
        if (!(obj instanceof X509AttributeCertificate))
        {
            return false;
        }

        X509AttributeCertificate attrCert = (X509AttributeCertificate) obj;

        if (this.attributeCert != null)
        {
            if (!this.attributeCert.equals(attrCert))
            {
                return false;
            }
        }
        if (serialNumber != null)
        {
            if (!attrCert.getSerialNumber().equals(serialNumber))
            {
                return false;
            }
        }
        if (holder != null)
        {
            if (!attrCert.getHolder().equals(holder))
            {
                return false;
            }
        }
        if (issuer != null)
        {
            if (!attrCert.getIssuer().equals(issuer))
            {
                return false;
            }
        }

        if (attributeCertificateValid != null)
        {
            try
            {
                attrCert.checkValidity(attributeCertificateValid);
            }
            catch (CertificateExpiredException e)
            {
                return false;
            }
            catch (CertificateNotYetValidException e)
            {
                return false;
            }
        }
        if (!targetNames.isEmpty() || !targetGroups.isEmpty())
        {

            byte[] targetInfoExt = attrCert
                .getExtensionValue(X509Extensions.TargetInformation.getId());
            if (targetInfoExt != null)
            {
                TargetInformation targetinfo;
                try
                {
                    targetinfo = TargetInformation
                        .getInstance(new ASN1InputStream(
                            ((DEROctetString) DEROctetString
                                .fromByteArray(targetInfoExt)).getOctets())
                            .readObject());
                }
                catch (IOException e)
                {
                    return false;
                }
                catch (IllegalArgumentException e)
                {
                    return false;
                }
                Targets[] targetss = targetinfo.getTargetsObjects();
                if (!targetNames.isEmpty())
                {
                    boolean found = false;

                    for (int i=0; i<targetss.length; i++)
                    {
                        Targets t = targetss[i];
                        Target[] targets = t.getTargets();
                        for (int j=0; j<targets.length; j++)
                        {
                            if (targetNames.contains(GeneralName.getInstance(targets[j]
                                                       .getTargetName())))
                            {
                                found = true;
                                break;
                            }
                        }
                    }
                    if (!found)
                    {
                        return false;
                    }
                }
                if (!targetGroups.isEmpty())
                {
                    boolean found = false;

                    for (int i=0; i<targetss.length; i++)
                    {
                        Targets t = targetss[i];
                        Target[] targets = t.getTargets();
                        for (int j=0; j<targets.length; j++)
                        {
                            if (targetGroups.contains(GeneralName.getInstance(targets[j]
                                                        .getTargetGroup())))
                            {
                                found = true;
                                break;
                            }
                        }
                    }
                    if (!found)
                    {
                        return false;
                    }
                }
            }
        }
        return true;
    }

    
Returns a clone of this object.

Returns:the clone.
/**
     * Returns a clone of this object.
     * 
     * @return the clone.
     */
    public Object clone()
    {
        X509AttributeCertStoreSelector sel = new X509AttributeCertStoreSelector();
        sel.attributeCert = attributeCert;
        sel.attributeCertificateValid = getAttributeCertificateValid();
        sel.holder = holder;
        sel.issuer = issuer;
        sel.serialNumber = serialNumber;
        sel.targetGroups = getTargetGroups();
        sel.targetNames = getTargetNames();
        return sel;
    }

    
Returns the attribute certificate which must be matched.

Returns:Returns the attribute certificate.
/**
     * Returns the attribute certificate which must be matched.
     * 
     * @return Returns the attribute certificate.
     */
    public X509AttributeCertificate getAttributeCert()
    {
        return attributeCert;
    }

    
Set the attribute certificate to be matched. If null is
given any will do.

Params:
  • attributeCert – The attribute certificate to set.
/**
     * Set the attribute certificate to be matched. If <code>null</code> is
     * given any will do.
     * 
     * @param attributeCert The attribute certificate to set.
     */
    public void setAttributeCert(X509AttributeCertificate attributeCert)
    {
        this.attributeCert = attributeCert;
    }

    
Get the criteria for the validity.

Returns:Returns the attributeCertificateValid.
/**
     * Get the criteria for the validity.
     * 
     * @return Returns the attributeCertificateValid.
     */
    public Date getAttributeCertificateValid()
    {
        if (attributeCertificateValid != null)
        {
            return new Date(attributeCertificateValid.getTime());
        }

        return null;
    }

    
Set the time, when the certificate must be valid. If null
is given any will do.

Params:
  • attributeCertificateValid – The attribute certificate validation
           time to set.
/**
     * Set the time, when the certificate must be valid. If <code>null</code>
     * is given any will do.
     * 
     * @param attributeCertificateValid The attribute certificate validation
     *            time to set.
     */
    public void setAttributeCertificateValid(Date attributeCertificateValid)
    {
        if (attributeCertificateValid != null)
        {
            this.attributeCertificateValid = new Date(attributeCertificateValid
                .getTime());
        }
        else
        {
            this.attributeCertificateValid = null;
        }
    }

    
Gets the holder.

Returns:Returns the holder.
/**
     * Gets the holder.
     * 
     * @return Returns the holder.
     */
    public AttributeCertificateHolder getHolder()
    {
        return holder;
    }

    
Sets the holder. If null is given any will do.

Params:
  • holder – The holder to set.
/**
     * Sets the holder. If <code>null</code> is given any will do.
     * 
     * @param holder The holder to set.
     */
    public void setHolder(AttributeCertificateHolder holder)
    {
        this.holder = holder;
    }

    
Returns the issuer criterion.

Returns:Returns the issuer.
/**
     * Returns the issuer criterion.
     * 
     * @return Returns the issuer.
     */
    public AttributeCertificateIssuer getIssuer()
    {
        return issuer;
    }

    
Sets the issuer the attribute certificate must have. If null
is given any will do.

Params:
  • issuer – The issuer to set.
/**
     * Sets the issuer the attribute certificate must have. If <code>null</code>
     * is given any will do.
     * 
     * @param issuer The issuer to set.
     */
    public void setIssuer(AttributeCertificateIssuer issuer)
    {
        this.issuer = issuer;
    }

    
Gets the serial number the attribute certificate must have.

Returns:Returns the serialNumber.
/**
     * Gets the serial number the attribute certificate must have.
     * 
     * @return Returns the serialNumber.
     */
    public BigInteger getSerialNumber()
    {
        return serialNumber;
    }

    
Sets the serial number the attribute certificate must have. If
null is given any will do.

Params:
  • serialNumber – The serialNumber to set.
/**
     * Sets the serial number the attribute certificate must have. If
     * <code>null</code> is given any will do.
     * 
     * @param serialNumber The serialNumber to set.
     */
    public void setSerialNumber(BigInteger serialNumber)
    {
        this.serialNumber = serialNumber;
    }

    
Adds a target name criterion for the attribute certificate to the target
information extension criteria. The X509AttributeCertificate
must contain at least one of the specified target names.


Each attribute certificate may contain a target information extension
limiting the servers where this attribute certificate can be used. If
this extension is not present, the attribute certificate is not targeted
and may be accepted by any server.

Params:
  • name – The name as a GeneralName (not null)
/**
     * Adds a target name criterion for the attribute certificate to the target
     * information extension criteria. The <code>X509AttributeCertificate</code>
     * must contain at least one of the specified target names.
     * <p>
     * Each attribute certificate may contain a target information extension
     * limiting the servers where this attribute certificate can be used. If
     * this extension is not present, the attribute certificate is not targeted
     * and may be accepted by any server.
     *
     * @param name The name as a GeneralName (not <code>null</code>)
     */
    public void addTargetName(GeneralName name)
    {
        targetNames.add(name);
    }

    
Adds a target name criterion for the attribute certificate to the target
information extension criteria. The X509AttributeCertificate
must contain at least one of the specified target names.


Each attribute certificate may contain a target information extension
limiting the servers where this attribute certificate can be used. If
this extension is not present, the attribute certificate is not targeted
and may be accepted by any server.

Params:
  • name – a byte array containing the name in ASN.1 DER encoded form of a GeneralName
Throws:
/**
     * Adds a target name criterion for the attribute certificate to the target
     * information extension criteria. The <code>X509AttributeCertificate</code>
     * must contain at least one of the specified target names.
     * <p>
     * Each attribute certificate may contain a target information extension
     * limiting the servers where this attribute certificate can be used. If
     * this extension is not present, the attribute certificate is not targeted
     * and may be accepted by any server.
     *
     * @param name a byte array containing the name in ASN.1 DER encoded form of a GeneralName
     * @throws IOException if a parsing error occurs.
     */
    public void addTargetName(byte[] name) throws IOException
    {
        addTargetName(GeneralName.getInstance(ASN1Object.fromByteArray(name)));
    }

    
Adds a collection with target names criteria. If null is
given any will do.


The collection consists of either GeneralName objects or byte[] arrays representing
DER encoded GeneralName structures.

Params:
  • names – A collection of target names.
Throws:
See Also:
/**
     * Adds a collection with target names criteria. If <code>null</code> is
     * given any will do.
     * <p>
     * The collection consists of either GeneralName objects or byte[] arrays representing
     * DER encoded GeneralName structures.
     * 
     * @param names A collection of target names.
     * @throws IOException if a parsing error occurs.
     * @see #addTargetName(byte[])
     * @see #addTargetName(GeneralName)
     */
    public void setTargetNames(Collection names) throws IOException
    {
        targetNames = extractGeneralNames(names);
    }

    
Gets the target names. The collection consists of GeneralName
objects.


The returned collection is immutable.

See Also:
Returns:The collection of target names
/**
     * Gets the target names. The collection consists of <code>GeneralName</code>
     * objects.
     * <p>
     * The returned collection is immutable.
     * 
     * @return The collection of target names
     * @see #setTargetNames(Collection)
     */
    public Collection getTargetNames()
    {
        return Collections.unmodifiableCollection(targetNames);
    }

    
Adds a target group criterion for the attribute certificate to the target
information extension criteria. The X509AttributeCertificate
must contain at least one of the specified target groups.


Each attribute certificate may contain a target information extension
limiting the servers where this attribute certificate can be used. If
this extension is not present, the attribute certificate is not targeted
and may be accepted by any server.

Params:
  • group – The group as GeneralName form (not null)
/**
     * Adds a target group criterion for the attribute certificate to the target
     * information extension criteria. The <code>X509AttributeCertificate</code>
     * must contain at least one of the specified target groups.
     * <p>
     * Each attribute certificate may contain a target information extension
     * limiting the servers where this attribute certificate can be used. If
     * this extension is not present, the attribute certificate is not targeted
     * and may be accepted by any server.
     *
     * @param group The group as GeneralName form (not <code>null</code>)
     */
    public void addTargetGroup(GeneralName group)
    {
        targetGroups.add(group);
    }

    
Adds a target group criterion for the attribute certificate to the target
information extension criteria. The X509AttributeCertificate
must contain at least one of the specified target groups.


Each attribute certificate may contain a target information extension
limiting the servers where this attribute certificate can be used. If
this extension is not present, the attribute certificate is not targeted
and may be accepted by any server.

Params:
  • name – a byte array containing the group in ASN.1 DER encoded form of a GeneralName
Throws:
/**
     * Adds a target group criterion for the attribute certificate to the target
     * information extension criteria. The <code>X509AttributeCertificate</code>
     * must contain at least one of the specified target groups.
     * <p>
     * Each attribute certificate may contain a target information extension
     * limiting the servers where this attribute certificate can be used. If
     * this extension is not present, the attribute certificate is not targeted
     * and may be accepted by any server.
     *
     * @param name a byte array containing the group in ASN.1 DER encoded form of a GeneralName
     * @throws IOException if a parsing error occurs.
     */
    public void addTargetGroup(byte[] name) throws IOException
    {
        addTargetGroup(GeneralName.getInstance(ASN1Object.fromByteArray(name)));
    }

    
Adds a collection with target groups criteria. If null is
given any will do.


The collection consists of GeneralName objects or byte[]
Params:
  • names – A collection of target groups.
Throws:
See Also:
/**
     * Adds a collection with target groups criteria. If <code>null</code> is
     * given any will do.
     * <p>
     * The collection consists of <code>GeneralName</code> objects or <code>byte[]</code representing DER
     * encoded GeneralNames.
     * 
     * @param names A collection of target groups.
     * @throws IOException if a parsing error occurs.
     * @see #addTargetGroup(byte[])
     * @see #addTargetGroup(GeneralName)
     */
    public void setTargetGroups(Collection names) throws IOException
    {
        targetGroups = extractGeneralNames(names);
    }



    
Gets the target groups. The collection consists of GeneralName objects.


The returned collection is immutable.

See Also:
Returns:The collection of target groups.
/**
     * Gets the target groups. The collection consists of <code>GeneralName</code> objects.
     * <p>
     * The returned collection is immutable.
     *
     * @return The collection of target groups.
     * @see #setTargetGroups(Collection)
     */
    public Collection getTargetGroups()
    {
        return Collections.unmodifiableCollection(targetGroups);
    }

    private Set extractGeneralNames(Collection names)
        throws IOException
    {
        if (names == null || names.isEmpty())
        {
            return new HashSet();
        }
        Set temp = new HashSet();
        for (Iterator it = names.iterator(); it.hasNext();)
        {
            Object o = it.next();
            if (o instanceof GeneralName)
            {
                temp.add(o);
            }
            else
            {
                temp.add(GeneralName.getInstance(ASN1Object.fromByteArray((byte[])o)));
            }
        }
        return temp;
    }
}