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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.oer.its.ieee1609dot2;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERTags;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * SymmetricCiphertext ::= CHOICE {
 * aes128ccm  AesCcmCiphertext,
 * ...
 * }
 */
public class SymmetricCiphertext
    extends ASN1Object
    implements ASN1Choice
{
    public static final int aes128ccm = 0;

    private final int choice;
    private final ASN1Encodable symmetricCiphertext;

    public SymmetricCiphertext(int choice, ASN1Encodable value)
    {
        this.choice = choice;
        this.symmetricCiphertext = value;
    }


    private SymmetricCiphertext(ASN1TaggedObject ato)
    {
        this.choice = ato.getTagNo();
        switch (choice)
        {
        case aes128ccm:
            symmetricCiphertext = AesCcmCiphertext.getInstance(ato.getObject());
            break;
        default:
            throw new IllegalArgumentException("invalid choice value " + choice);
        }
    }

    public static SymmetricCiphertext aes128ccm(AesCcmCiphertext ciphertext)
    {
        return new SymmetricCiphertext(aes128ccm, ciphertext);
    }



    public static SymmetricCiphertext getInstance(Object o)
    {
        if (o instanceof SymmetricCiphertext)
        {
            return (SymmetricCiphertext)o;
        }

        if (o != null)
        {
            return new SymmetricCiphertext(ASN1TaggedObject.getInstance(o));
        }

        return null;
    }

    public int getChoice()
    {
        return choice;
    }

    public ASN1Encodable getSymmetricCiphertext()
    {
        return symmetricCiphertext;
    }

    public ASN1Primitive toASN1Primitive()
    {
        return new DERTaggedObject(choice, symmetricCiphertext);
    }

}