package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

RFC 3274: CMS Compressed Data.
CompressedData ::= SEQUENCE {
    version CMSVersion,
    compressionAlgorithm CompressionAlgorithmIdentifier,
    encapContentInfo EncapsulatedContentInfo
}
/** * <a href="http://tools.ietf.org/html/rfc3274">RFC 3274</a>: CMS Compressed Data. * * <pre> * CompressedData ::= SEQUENCE { * version CMSVersion, * compressionAlgorithm CompressionAlgorithmIdentifier, * encapContentInfo EncapsulatedContentInfo * } * </pre> */
public class CompressedData extends ASN1Object { private ASN1Integer version; private AlgorithmIdentifier compressionAlgorithm; private ContentInfo encapContentInfo; public CompressedData( AlgorithmIdentifier compressionAlgorithm, ContentInfo encapContentInfo) { this.version = new ASN1Integer(0); this.compressionAlgorithm = compressionAlgorithm; this.encapContentInfo = encapContentInfo; } private CompressedData( ASN1Sequence seq) { this.version = (ASN1Integer)seq.getObjectAt(0); this.compressionAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(1)); this.encapContentInfo = ContentInfo.getInstance(seq.getObjectAt(2)); }
Return a CompressedData object from a tagged object.
Params:
  • ato – the tagged object holding the object we want.
  • isExplicit – true if the object is meant to be explicitly tagged false otherwise.
Throws:
/** * Return a CompressedData object from a tagged object. * * @param ato the tagged object holding the object we want. * @param isExplicit true if the object is meant to be explicitly * tagged false otherwise. * @exception IllegalArgumentException if the object held by the * tagged object cannot be converted. */
public static CompressedData getInstance( ASN1TaggedObject ato, boolean isExplicit) { return getInstance(ASN1Sequence.getInstance(ato, isExplicit)); }
Return a CompressedData object from the given object.

Accepted inputs:

Params:
  • obj – the object we want converted.
Throws:
/** * Return a CompressedData object from the given object. * <p> * Accepted inputs: * <ul> * <li> null &rarr; null * <li> {@link CompressedData} object * <li> {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with CompressedData structure inside * </ul> * * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */
public static CompressedData getInstance( Object obj) { if (obj instanceof CompressedData) { return (CompressedData)obj; } if (obj != null) { return new CompressedData(ASN1Sequence.getInstance(obj)); } return null; } public ASN1Integer getVersion() { return version; } public AlgorithmIdentifier getCompressionAlgorithmIdentifier() { return compressionAlgorithm; } public ContentInfo getEncapContentInfo() { return encapContentInfo; } public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(version); v.add(compressionAlgorithm); v.add(encapContentInfo); return new BERSequence(v); } }