org.spongycastle.asn1.x9

Class KeySpecificInfo

java.lang.Object

org.spongycastle.asn1.ASN1Object

org.spongycastle.asn1.x9.KeySpecificInfo

All Implemented Interfaces:

ASN1Encodable, Encodable

public class KeySpecificInfo
extends ASN1Object

ASN.1 def for Diffie-Hellman key exchange KeySpecificInfo structure. See RFC 2631, or X9.42, for further details.

  KeySpecificInfo ::= SEQUENCE {
      algorithm OBJECT IDENTIFIER,
      counter OCTET STRING SIZE (4..4)
  }
 

Constructor Summary

Constructors

Constructor and Description
KeySpecificInfo(ASN1ObjectIdentifier algorithm, ASN1OctetString counter) Base constructor.

Method Summary

Modifier and Type	Method and Description
ASN1ObjectIdentifier	getAlgorithm() The object identifier for the CEK wrapping algorithm.
ASN1OctetString	getCounter() The initial counter value for key derivation.
static KeySpecificInfo	getInstance(java.lang.Object obj) Return a KeySpecificInfo object from the passed in object.
ASN1Primitive	toASN1Primitive() Return an ASN.1 primitive representation of this object.

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

KeySpecificInfo

public KeySpecificInfo(ASN1ObjectIdentifier algorithm,
                       ASN1OctetString counter)

Base constructor.

Parameters:

algorithm - algorithm identifier for the CEK.

counter - initial counter value for key derivation.

Method Detail

getInstance

public static KeySpecificInfo getInstance(java.lang.Object obj)

Return a KeySpecificInfo object from the passed in object.

Parameters:

obj - an object for conversion or a byte[].

Returns:

a KeySpecificInfo

getAlgorithm

public ASN1ObjectIdentifier getAlgorithm()

The object identifier for the CEK wrapping algorithm.

Returns:

CEK wrapping algorithm OID.

getCounter

public ASN1OctetString getCounter()

The initial counter value for key derivation.

Returns:

initial counter value as a 4 byte octet string (big endian).

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Return an ASN.1 primitive representation of this object.

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a DERSequence containing the parameter values.