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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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/***************************************************************/
/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
/***************************************************************/
package org.bouncycastle.asn1.crmf;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

public class EncryptedValue
    extends ASN1Object
{
    private AlgorithmIdentifier intendedAlg;
    private AlgorithmIdentifier symmAlg;
    private DERBitString        encSymmKey;
    private AlgorithmIdentifier keyAlg;
    private ASN1OctetString     valueHint;
    private DERBitString        encValue;

    private EncryptedValue(ASN1Sequence seq)
    {
        int index = 0;
        while (seq.getObjectAt(index) instanceof ASN1TaggedObject)
        {
            ASN1TaggedObject tObj = (ASN1TaggedObject)seq.getObjectAt(index);

            switch (tObj.getTagNo())
            {
            case 0:
                intendedAlg = AlgorithmIdentifier.getInstance(tObj, false);
                break;
            case 1:
                symmAlg = AlgorithmIdentifier.getInstance(tObj, false);
                break;
            case 2:
                encSymmKey = DERBitString.getInstance(tObj, false);
                break;
            case 3:
                keyAlg = AlgorithmIdentifier.getInstance(tObj, false);
                break;
            case 4:
                valueHint = ASN1OctetString.getInstance(tObj, false);
                break;
            default:
                throw new IllegalArgumentException("Unknown tag encountered: " + tObj.getTagNo());
            }
            index++;
        }

        encValue = DERBitString.getInstance(seq.getObjectAt(index));
    }

    public static EncryptedValue getInstance(Object o)
    {
        if (o instanceof EncryptedValue)
        {
            return (EncryptedValue)o;
        }
        else if (o != null)
        {
            return new EncryptedValue(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public EncryptedValue(
        AlgorithmIdentifier intendedAlg,
        AlgorithmIdentifier symmAlg,
        DERBitString encSymmKey,
        AlgorithmIdentifier keyAlg,
        ASN1OctetString valueHint,
        DERBitString encValue)
    {
        if (encValue == null)
        {
            throw new IllegalArgumentException("'encValue' cannot be null");
        }

        this.intendedAlg = intendedAlg;
        this.symmAlg = symmAlg;
        this.encSymmKey = encSymmKey;
        this.keyAlg = keyAlg;
        this.valueHint = valueHint;
        this.encValue = encValue;
    }

    public AlgorithmIdentifier getIntendedAlg()
    {
        return intendedAlg;
    }

    public AlgorithmIdentifier getSymmAlg()
    {
        return symmAlg;
    }

    public DERBitString getEncSymmKey()
    {
        return encSymmKey;
    }

    public AlgorithmIdentifier getKeyAlg()
    {
        return keyAlg;
    }

    public ASN1OctetString getValueHint()
    {
        return valueHint;
    }

    public DERBitString getEncValue()
    {
        return encValue;
    }

    /**
     *      * EncryptedValue ::= SEQUENCE {
     *                     intendedAlg   [0] AlgorithmIdentifier  OPTIONAL,
     *                     -- the intended algorithm for which the value will be used
     *                     symmAlg       [1] AlgorithmIdentifier  OPTIONAL,
     *                     -- the symmetric algorithm used to encrypt the value
     *                     encSymmKey    [2] BIT STRING           OPTIONAL,
     *                     -- the (encrypted) symmetric key used to encrypt the value
     *                     keyAlg        [3] AlgorithmIdentifier  OPTIONAL,
     *                     -- algorithm used to encrypt the symmetric key
     *                     valueHint     [4] OCTET STRING         OPTIONAL,
     *                     -- a brief description or identifier of the encValue content
     *                     -- (may be meaningful only to the sending entity, and used only
     *                     -- if EncryptedValue might be re-examined by the sending entity
     *                     -- in the future)
     *                     encValue       BIT STRING }
     *                     -- the encrypted value itself
     * 
     * @return a basic ASN.1 object representation.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();

        addOptional(v, 0, intendedAlg);
        addOptional(v, 1, symmAlg);
        addOptional(v, 2, encSymmKey);
        addOptional(v, 3, keyAlg);
        addOptional(v, 4, valueHint);

        v.add(encValue);

        return new DERSequence(v);
    }

    private void addOptional(ASN1EncodableVector v, int tagNo, ASN1Encodable obj)
    {
        if (obj != null)
        {
            v.add(new DERTaggedObject(false, tagNo, obj));
        }
    }
}