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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8. Note: this package includes the NTRU encryption algorithms.

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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; } }




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