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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.its;

import org.bouncycastle.oer.its.ieee1609dot2.PKRecipientInfo;
import org.bouncycastle.oer.its.ieee1609dot2.RecipientInfo;
import org.bouncycastle.oer.its.ieee1609dot2.basetypes.HashedId8;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Selector;

public class ETSIRecipientID
    implements Selector
{
    private final HashedId8 id;

    public ETSIRecipientID(byte[] id)
    {
        this(new HashedId8(id));
    }

    public ETSIRecipientID(HashedId8 id)
    {
        this.id = id;
    }

    @Override
    public boolean equals(Object o)
    {
        if (this == o)
        {
            return true;
        }
        if (o == null || getClass() != o.getClass())
        {
            return false;
        }

        ETSIRecipientID that = (ETSIRecipientID)o;

        return id != null ? id.equals(that.id) : that.id == null;
    }

    @Override
    public int hashCode()
    {
        return id != null ? id.hashCode() : 0;
    }

    public boolean match(ETSIRecipientInfo obj)
    {
        if (obj.getRecipientInfo().getChoice() == RecipientInfo.certRecipInfo)
        {
            PKRecipientInfo objPkInfo = PKRecipientInfo.getInstance(obj.getRecipientInfo().getRecipientInfo());
            return Arrays.areEqual(objPkInfo.getRecipientId().getHashBytes(), this.id.getHashBytes());
        }
        return false;
    }

    public Object clone()
    {
        return this;
    }
}