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

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcutil-jdk15on Show documentation

The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls. This jar contains APIs for JDK 1.5 and up.

There is a newer version: 1.70

Show newest version

package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.BERTaggedObject;

/**
 * RFC 5652 EncryptedData object.
 * 
 * 
 * EncryptedData ::= SEQUENCE {
 *     version CMSVersion,
 *     encryptedContentInfo EncryptedContentInfo,
 *     unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL }
 * 
 */
public class EncryptedData
    extends ASN1Object
{
    private ASN1Integer version;
    private EncryptedContentInfo encryptedContentInfo;
    private ASN1Set unprotectedAttrs;

    /**
     * Return an EncryptedData object from the given object.
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link EncryptedData} object
     * 
 {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats
     * 
     *
     * @param o the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static EncryptedData getInstance(Object o)
    {
        if (o instanceof EncryptedData)
        {
            return (EncryptedData)o;
        }

        if (o != null)
        {
            return new EncryptedData(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    public EncryptedData(EncryptedContentInfo encInfo)
    {
        this(encInfo,  null);
    }

    public EncryptedData(EncryptedContentInfo encInfo, ASN1Set unprotectedAttrs)
    {
        this.version = new ASN1Integer((unprotectedAttrs == null) ? 0 : 2);
        this.encryptedContentInfo = encInfo;
        this.unprotectedAttrs = unprotectedAttrs;
    }

    private EncryptedData(ASN1Sequence seq)
    {
        this.version = ASN1Integer.getInstance(seq.getObjectAt(0));
        this.encryptedContentInfo = EncryptedContentInfo.getInstance(seq.getObjectAt(1));

        if (seq.size() == 3)
        {
            this.unprotectedAttrs = ASN1Set.getInstance((ASN1TaggedObject)seq.getObjectAt(2), false);
        }
    }

    public ASN1Integer getVersion()
    {
        return version;
    }

    public EncryptedContentInfo getEncryptedContentInfo()
    {
        return encryptedContentInfo;
    }

    public ASN1Set getUnprotectedAttrs()
    {
        return unprotectedAttrs;
    }

    /**
     * @return a basic ASN.1 object representation.
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(3);

        v.add(version);
        v.add(encryptedContentInfo);
        if (unprotectedAttrs != null)
        {
            v.add(new BERTaggedObject(false, 1, unprotectedAttrs));
        }

        return new BERSequence(v);
    }
}