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;

EnvelopedData ::= SEQUENCE {
    version CMSVersion,
    originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
    recipientInfos RecipientInfos,
    encryptedContentInfo EncryptedContentInfo,
    unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL 
}
/** * <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; } }