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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.

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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.ASN1Set;
import org.bouncycastle.asn1.DERSequence;

/**
 * RFC 5652:
 * Attribute is a pair of OID (as type identifier) + set of values.
 * 

*

 * Attribute ::= SEQUENCE {
 *     attrType OBJECT IDENTIFIER,
 *     attrValues SET OF AttributeValue
 * }
 * 
 * AttributeValue ::= ANY
 * 
*

* General rule on values is that same AttributeValue must not be included * multiple times into the set. That is, if the value is a SET OF INTEGERs, * then having same value repeated is wrong: (1, 1), but different values is OK: (1, 2). * Normally the AttributeValue syntaxes are more complicated than that. *

* General rule of Attribute usage is that the {@link Attributes} containers * must not have multiple Attribute:s with same attrType (OID) there. */ public class Attribute extends ASN1Object { private ASN1ObjectIdentifier attrType; private ASN1Set attrValues; /** * Return an Attribute object from the given object. *

* Accepted inputs: *

    *
  • null → null *
  • {@link Attribute} object *
  • {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with Attribute structure inside *
* * @param o the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static Attribute getInstance( Object o) { if (o instanceof Attribute) { return (Attribute)o; } if (o != null) { return new Attribute(ASN1Sequence.getInstance(o)); } return null; } private Attribute( ASN1Sequence seq) { attrType = (ASN1ObjectIdentifier)seq.getObjectAt(0); attrValues = (ASN1Set)seq.getObjectAt(1); } public Attribute( ASN1ObjectIdentifier attrType, ASN1Set attrValues) { this.attrType = attrType; this.attrValues = attrValues; } public ASN1ObjectIdentifier getAttrType() { return attrType; } public ASN1Set getAttrValues() { return attrValues; } public ASN1Encodable[] getAttributeValues() { return attrValues.toArray(); } /** * Produce an object suitable for an ASN1OutputStream. */ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(attrType); v.add(attrValues); return new DERSequence(v); } }




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