org.spongycastle.asn1.cms

Class Attribute

java.lang.Object

org.spongycastle.asn1.ASN1Object

org.spongycastle.asn1.cms.Attribute

All Implemented Interfaces:

ASN1Encodable, Encodable

Direct Known Subclasses:

SMIMECapabilitiesAttribute, SMIMEEncryptionKeyPreferenceAttribute

public class Attribute
extends ASN1Object

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 Attributes containers must not have multiple Attribute:s with same attrType (OID) there.

Constructor Summary

Constructors

Constructor and Description
Attribute(ASN1ObjectIdentifier attrType, ASN1Set attrValues)

Method Summary

Modifier and Type	Method and Description
ASN1Encodable[]	getAttributeValues()
ASN1ObjectIdentifier	getAttrType()
ASN1Set	getAttrValues()
static Attribute	getInstance(java.lang.Object o) Return an Attribute object from the given object.
ASN1Primitive	toASN1Primitive() Produce an object suitable for an ASN1OutputStream.

Methods inherited from class org.spongycastle.asn1.ASN1Object

equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode, toASN1Object

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Attribute

public Attribute(ASN1ObjectIdentifier attrType,
                 ASN1Set attrValues)

Method Detail

getInstance

public static Attribute getInstance(java.lang.Object o)

Return an Attribute object from the given object.

Accepted inputs:

• null → null
• Attribute object
• ASN1Sequence input formats with Attribute structure inside

Parameters:

o - the object we want converted.

Throws:

java.lang.IllegalArgumentException - if the object cannot be converted.

getAttrType

public ASN1ObjectIdentifier getAttrType()

getAttrValues

public ASN1Set getAttrValues()

getAttributeValues

public ASN1Encodable[] getAttributeValues()

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Produce an object suitable for an ASN1OutputStream.

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a primitive representation of this object.