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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 org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/** 
 * RFC 5652 DigestedData object.
 * 
 * DigestedData ::= SEQUENCE {
 *       version CMSVersion,
 *       digestAlgorithm DigestAlgorithmIdentifier,
 *       encapContentInfo EncapsulatedContentInfo,
 *       digest Digest }
 * 
*/ public class DigestedData extends ASN1Object { private ASN1Integer version; private AlgorithmIdentifier digestAlgorithm; private ContentInfo encapContentInfo; private ASN1OctetString digest; public DigestedData( AlgorithmIdentifier digestAlgorithm, ContentInfo encapContentInfo, byte[] digest) { this.version = new ASN1Integer(0); this.digestAlgorithm = digestAlgorithm; this.encapContentInfo = encapContentInfo; this.digest = new DEROctetString(digest); } private DigestedData( ASN1Sequence seq) { this.version = (ASN1Integer)seq.getObjectAt(0); this.digestAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(1)); this.encapContentInfo = ContentInfo.getInstance(seq.getObjectAt(2)); this.digest = ASN1OctetString.getInstance(seq.getObjectAt(3)); } /** * Return a DigestedData 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 DigestedData getInstance( ASN1TaggedObject ato, boolean isExplicit) { return getInstance(ASN1Sequence.getInstance(ato, isExplicit)); } /** * Return a DigestedData object from the given object. *

* Accepted inputs: *

    *
  • null → null *
  • {@link DigestedData} object *
  • {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats *
* * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static DigestedData getInstance( Object obj) { if (obj instanceof DigestedData) { return (DigestedData)obj; } if (obj != null) { return new DigestedData(ASN1Sequence.getInstance(obj)); } return null; } public ASN1Integer getVersion() { return version; } public AlgorithmIdentifier getDigestAlgorithm() { return digestAlgorithm; } public ContentInfo getEncapContentInfo() { return encapContentInfo; } public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(version); v.add(digestAlgorithm); v.add(encapContentInfo); v.add(digest); return new BERSequence(v); } public byte[] getDigest() { return digest.getOctets(); } }




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