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

import java.io.IOException;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1SequenceParser;
import org.bouncycastle.asn1.ASN1SetParser;
import org.bouncycastle.asn1.ASN1TaggedObjectParser;
import org.bouncycastle.asn1.BERTags;

/** 
 * Parser of RFC 5652 {@link EnvelopedData} object.
 * 
 * 
 * EnvelopedData ::= SEQUENCE {
 *     version CMSVersion,
 *     originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
 *     recipientInfos RecipientInfos,
 *     encryptedContentInfo EncryptedContentInfo,
 *     unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL 
 * }
 * 
 */
public class EnvelopedDataParser
{
    private ASN1SequenceParser _seq;
    private ASN1Integer        _version;
    private ASN1Encodable      _nextObject;
    private boolean            _originatorInfoCalled;
    
    public EnvelopedDataParser(
        ASN1SequenceParser seq)
        throws IOException
    {
        this._seq = seq;
        this._version = ASN1Integer.getInstance(seq.readObject());
    }

    public ASN1Integer getVersion()
    {
        return _version;
    }

    public OriginatorInfo getOriginatorInfo() 
        throws IOException
    {
        _originatorInfoCalled = true; 
        
        if (_nextObject == null)
        {
            _nextObject = _seq.readObject();
        }
        
        if (_nextObject instanceof ASN1TaggedObjectParser && ((ASN1TaggedObjectParser)_nextObject).getTagNo() == 0)
        {
            ASN1SequenceParser originatorInfo = (ASN1SequenceParser) ((ASN1TaggedObjectParser)_nextObject).getObjectParser(BERTags.SEQUENCE, false);
            _nextObject = null;
            return OriginatorInfo.getInstance(originatorInfo.toASN1Primitive());
        }
        
        return null;
    }
    
    public ASN1SetParser getRecipientInfos()
        throws IOException
    {
        if (!_originatorInfoCalled)
        {
            getOriginatorInfo();
        }
        
        if (_nextObject == null)
        {
            _nextObject = _seq.readObject();
        }
        
        ASN1SetParser recipientInfos = (ASN1SetParser)_nextObject;
        _nextObject = null;
        return recipientInfos;
    }

    public EncryptedContentInfoParser getEncryptedContentInfo() 
        throws IOException
    {
        if (_nextObject == null)
        {
            _nextObject = _seq.readObject();
        }
        
        
        if (_nextObject != null)
        {
            ASN1SequenceParser o = (ASN1SequenceParser) _nextObject;
            _nextObject = null;
            return new EncryptedContentInfoParser(o);
        }
        
        return null;
    }

    public ASN1SetParser getUnprotectedAttrs()
        throws IOException
    {
        if (_nextObject == null)
        {
            _nextObject = _seq.readObject();
        }
        
        
        if (_nextObject != null)
        {
            ASN1Encodable o = _nextObject;
            _nextObject = null;
            return (ASN1SetParser)((ASN1TaggedObjectParser)o).getObjectParser(BERTags.SET, false);
        }
        
        return null;
    }
}