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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.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.BERTaggedObject;

/**
 * RFC 5652 ContentInfo, and 
 * RFC 5652 EncapsulatedContentInfo objects.
 *
 * 
 * ContentInfo ::= SEQUENCE {
 *     contentType ContentType,
 *     content [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL
 * }
 *
 * EncapsulatedContentInfo ::= SEQUENCE {
 *     eContentType ContentType,
 *     eContent [0] EXPLICIT OCTET STRING OPTIONAL
 * }
 * 
*/ public class ContentInfo extends ASN1Object implements CMSObjectIdentifiers { private ASN1ObjectIdentifier contentType; private ASN1Encodable content; /** * Return an ContentInfo object from the given object. *

* Accepted inputs: *

    *
  • null → null *
  • {@link ContentInfo} object *
  • {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with ContentInfo structure inside *
* * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static ContentInfo getInstance( Object obj) { if (obj instanceof ContentInfo) { return (ContentInfo)obj; } else if (obj != null) { return new ContentInfo(ASN1Sequence.getInstance(obj)); } return null; } public static ContentInfo getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(ASN1Sequence.getInstance(obj, explicit)); } /** * @deprecated use getInstance() */ public ContentInfo( ASN1Sequence seq) { if (seq.size() < 1 || seq.size() > 2) { throw new IllegalArgumentException("Bad sequence size: " + seq.size()); } contentType = (ASN1ObjectIdentifier)seq.getObjectAt(0); if (seq.size() > 1) { ASN1TaggedObject tagged = (ASN1TaggedObject)seq.getObjectAt(1); if (!tagged.isExplicit() || tagged.getTagNo() != 0) { throw new IllegalArgumentException("Bad tag for 'content'"); } content = tagged.getObject(); } } public ContentInfo( ASN1ObjectIdentifier contentType, ASN1Encodable content) { this.contentType = contentType; this.content = content; } public ASN1ObjectIdentifier getContentType() { return contentType; } public ASN1Encodable getContent() { return content; } /** * Produce an object suitable for an ASN1OutputStream. */ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(contentType); if (content != null) { v.add(new BERTaggedObject(0, content)); } return new BERSequence(v); } }




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