org.bouncycastle.asn1.cms.EncryptedContentInfo 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.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.BERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/**
 * RFC 5652 EncryptedContentInfo object.
 *
 *  * EncryptedContentInfo ::= SEQUENCE {
 *     contentType ContentType,
 *     contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
 *     encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL 
 * }
 * 
 */
public class EncryptedContentInfo
    extends ASN1Object
{
    private ASN1ObjectIdentifier contentType;
    private AlgorithmIdentifier contentEncryptionAlgorithm;
    private ASN1OctetString     encryptedContent;
    
    public EncryptedContentInfo(
        ASN1ObjectIdentifier contentType, 
        AlgorithmIdentifier contentEncryptionAlgorithm,
        ASN1OctetString     encryptedContent)
    {
        this.contentType = contentType;
        this.contentEncryptionAlgorithm = contentEncryptionAlgorithm;
        this.encryptedContent = encryptedContent;
    }
    
    private EncryptedContentInfo(
        ASN1Sequence seq)
    {
        if (seq.size() < 2)
        {
            throw new IllegalArgumentException("Truncated Sequence Found");
        }

        contentType = (ASN1ObjectIdentifier)seq.getObjectAt(0);
        contentEncryptionAlgorithm = AlgorithmIdentifier.getInstance(
                                                        seq.getObjectAt(1));
        if (seq.size() > 2)
        {
            encryptedContent = ASN1OctetString.getInstance(
                                (ASN1TaggedObject)seq.getObjectAt(2), false);
        }
    }

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

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

    public ASN1ObjectIdentifier getContentType()
    {
        return contentType;
    }

    public AlgorithmIdentifier getContentEncryptionAlgorithm()
    {
        return contentEncryptionAlgorithm;
    }

    public ASN1OctetString getEncryptedContent()
    {
        return encryptedContent;
    }

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

        if (encryptedContent != null)
        {
            v.add(new BERTaggedObject(false, 0, encryptedContent));
        }
        
        return new BERSequence(v);
    }
}