org.bouncycastle.asn1.cms.PasswordRecipientInfo Maven / Gradle / Ivy

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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     ******/
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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
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.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 *  * PasswordRecipientInfo ::= SEQUENCE {
 *     version       CMSVersion,   -- Always set to 0
 *     keyDerivationAlgorithm [0] KeyDerivationAlgorithmIdentifier
 *                             OPTIONAL,
 *     keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
 *     encryptedKey  EncryptedKey }
 * 
 */
public class PasswordRecipientInfo
    extends ASN1Object
{
    private ASN1Integer          version;
    private AlgorithmIdentifier keyDerivationAlgorithm;
    private AlgorithmIdentifier keyEncryptionAlgorithm;
    private ASN1OctetString     encryptedKey;

    public PasswordRecipientInfo(
        AlgorithmIdentifier     keyEncryptionAlgorithm,
        ASN1OctetString         encryptedKey)
    {
        this.version = new ASN1Integer(0);
        this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
        this.encryptedKey = encryptedKey;
    }
    
    public PasswordRecipientInfo(
        AlgorithmIdentifier     keyDerivationAlgorithm,
        AlgorithmIdentifier     keyEncryptionAlgorithm,
        ASN1OctetString         encryptedKey)
    {
        this.version = new ASN1Integer(0);
        this.keyDerivationAlgorithm = keyDerivationAlgorithm;
        this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
        this.encryptedKey = encryptedKey;
    }

    private PasswordRecipientInfo(
        ASN1Sequence seq)
    {
        version = (ASN1Integer)seq.getObjectAt(0);
        if (seq.getObjectAt(1) instanceof ASN1TaggedObject)
        {
            keyDerivationAlgorithm = AlgorithmIdentifier.getInstance((ASN1TaggedObject)seq.getObjectAt(1), false);
            keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(2));
            encryptedKey = (ASN1OctetString)seq.getObjectAt(3);
        }
        else
        {
            keyEncryptionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(1));
            encryptedKey = (ASN1OctetString)seq.getObjectAt(2);
        }
    }

    /**
     * Return a PasswordRecipientInfo object from a tagged object.
     *
     * @param obj the tagged object holding the object we want.
     * @param explicit true if the object is meant to be explicitly
     *              tagged false otherwise.
     * @exception IllegalArgumentException if the object held by the
     *          tagged object cannot be converted.
     */
    public static PasswordRecipientInfo getInstance(
        ASN1TaggedObject    obj,
        boolean             explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }
    
    /**
     * Return a PasswordRecipientInfo object from the given object.
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link PasswordRecipientInfo} object
     * 
 {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with PasswordRecipientInfo structure inside
     * 
     *
     * @param obj the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static PasswordRecipientInfo getInstance(
        Object obj)
    {
        if (obj instanceof PasswordRecipientInfo)
        {
            return (PasswordRecipientInfo)obj;
        }
        
        if (obj != null)
        {
            return new PasswordRecipientInfo(ASN1Sequence.getInstance(obj));
        }
        
        return null;
    }

    public ASN1Integer getVersion()
    {
        return version;
    }

    public AlgorithmIdentifier getKeyDerivationAlgorithm()
    {
        return keyDerivationAlgorithm;
    }

    public AlgorithmIdentifier getKeyEncryptionAlgorithm()
    {
        return keyEncryptionAlgorithm;
    }

    public ASN1OctetString getEncryptedKey()
    {
        return encryptedKey;
    }

    /** 
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector  v = new ASN1EncodableVector();

        v.add(version);
        
        if (keyDerivationAlgorithm != null)
        {
            v.add(new DERTaggedObject(false, 0, keyDerivationAlgorithm));
        }
        v.add(keyEncryptionAlgorithm);
        v.add(encryptedKey);

        return new DERSequence(v);
    }
}