iaik.security.ec.common

Class X963ASN1SharedInfo

java.lang.Object

iaik.security.ec.common.X963ASN1SharedInfo

All Implemented Interfaces:

iaik.asn1.ASN1Type

public final class X963ASN1SharedInfo
extends Object
implements iaik.asn1.ASN1Type

Implements the ASN.1 syntax for key derivation functions following the subsequent form:

  ASN1SharedInfo ::= SEQUENCE {
     keyInfo AlgorithmIdentifier,
     entityUInfo [0] OCTET STRING OPTIONAL,
     entityVInfo [1] OCTET STRING OPTIONAL,
     suppPubInfo [2] OCTET STRING OPTIONAL,
     suppPrivInfo [3] OCTET STRING OPTIONAL
  }
 

References:

[1] Certicom Research. 2009. Standards for Efficient Cryptography - SEC 1: Elliptic Curve Cryptography v2.0

Author:

Christian Hanser, Dieter Bratko

See Also:

X963KDFParameterSpec

Constructor Summary

Constructors

Constructor and Description
X963ASN1SharedInfo() Constructs an new empty instance.
X963ASN1SharedInfo(iaik.asn1.structures.AlgorithmID keyInfo, byte[] entityUInfo, byte[] entityVInfo, byte[] suppPubInfo, byte[] suppPrivInfo) Creates a new instance for given parameters.
X963ASN1SharedInfo(iaik.asn1.ASN1Object obj) Constructs a new instance from an ASN1Object.

Method Summary

Modifier and Type	Method and Description
void	decode(iaik.asn1.ASN1Object obj) Creates a new ASN1SharedInfo object from the specified ASN.1 structure.
iaik.asn1.SEQUENCE	toASN1Object() Constructs a new ASN.1 encoding from this shared information of the following form:

Methods inherited from class java.lang.Object

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

Constructor Detail

X963ASN1SharedInfo

public X963ASN1SharedInfo()

Constructs an new empty instance.

X963ASN1SharedInfo

public X963ASN1SharedInfo(iaik.asn1.structures.AlgorithmID keyInfo,
                          byte[] entityUInfo,
                          byte[] entityVInfo,
                          byte[] suppPubInfo,
                          byte[] suppPrivInfo)

Creates a new instance for given parameters.

Parameters:

keyInfo - the symmetric algorithm for which the key should be derived

entityUInfo - additional information about the scheme's initiator, for instance the entity's DN or public key

entityVInfo - additional information about the scheme's responder, for instance the entity's DN or public key

suppPubInfo - additional public information known to both entities

suppPrivInfo - additional private information known to both entities

X963ASN1SharedInfo

public X963ASN1SharedInfo(iaik.asn1.ASN1Object obj)
                   throws iaik.asn1.CodingException

Constructs a new instance from an ASN1Object.

Parameters:

obj - the ASN1Object

Throws:

iaik.asn1.CodingException - if obj does not belong to a valid ASN1SharedInfo SEQUENCE

Method Detail

decode

public void decode(iaik.asn1.ASN1Object obj)
            throws iaik.asn1.CodingException

Creates a new ASN1SharedInfo object from the specified ASN.1 structure.

Specified by:

decode in interface iaik.asn1.ASN1Type

Parameters:

obj - the ASN.1 object.

Throws:

iaik.asn1.CodingException - if the ASN.1 has an invalid syntax

See Also:

toASN1Object()

toASN1Object

public iaik.asn1.SEQUENCE toASN1Object()

Constructs a new ASN.1 encoding from this shared information of the following form:

  ASN1SharedInfo ::= SEQUENCE {
     keyInfo AlgorithmIdentifier,
     entityUInfo [0] OCTET STRING OPTIONAL,
     entityVInfo [1] OCTET STRING OPTIONAL,
     suppPubInfo [2] OCTET STRING OPTIONAL,
     suppPrivInfo [3] OCTET STRING OPTIONAL
  }
 

Specified by:

toASN1Object in interface iaik.asn1.ASN1Type