package org.bouncycastle.asn1.cms;
import org.bouncycastle.asn1.ASN1SequenceParser;
import org.bouncycastle.asn1.ASN1SetParser;
import org.bouncycastle.asn1.ASN1TaggedObjectParser;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.DERTags;
import java.io.IOException;
/**
* <pre>
* EnvelopedData ::= SEQUENCE {
* version CMSVersion,
* originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
* recipientInfos RecipientInfos,
* encryptedContentInfo EncryptedContentInfo,
* unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL
* }
* </pre>
*/
public class EnvelopedDataParser
{
private ASN1SequenceParser _seq;
private DERInteger _version;
private DEREncodable _nextObject;
private boolean _originatorInfoCalled;
public EnvelopedDataParser(
ASN1SequenceParser seq)
throws IOException
{
this._seq = seq;
this._version = (DERInteger)seq.readObject();
}
public DERInteger 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(DERTags.SEQUENCE, false);
_nextObject = null;
return OriginatorInfo.getInstance(originatorInfo.getDERObject());
}
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)
{
DEREncodable o = _nextObject;
_nextObject = null;
return (ASN1SetParser)((ASN1TaggedObjectParser)o).getObjectParser(DERTags.SET, false);
}
return null;
}
}