de.flexiprovider.pqc.ecc.mceliece
Class McElieceCCA2PrivateKey

java.lang.Object
  |
  +--de.flexiprovider.api.keys.PrivateKey
        |
        +--de.flexiprovider.pqc.ecc.mceliece.McElieceCCA2PrivateKey

All Implemented Interfaces:

java.security.Key, Key, java.security.PrivateKey, java.io.Serializable

public class McElieceCCA2PrivateKey

extends PrivateKey

This class implements a McEliece CCA2 private key and is usually instantiated by the McElieceCCA2KeyPairGenerator or McElieceCCA2KeyFactory.

Author:

Elena Klintsevich, Martin Döring

See Also:

McElieceCCA2KeyPairGenerator, Serialized Form

Fields inherited from interface java.security.Key

serialVersionUID

Fields inherited from interface java.security.PrivateKey

serialVersionUID

Constructor Summary

protected	McElieceCCA2PrivateKey(int n, int k, GF2mField field, PolynomialGF2mSmallM gp, Permutation p, GF2Matrix h, PolynomialGF2mSmallM[] qInv) Constructor (used by the McElieceCCA2KeyPairGenerator).
protected	McElieceCCA2PrivateKey(McElieceCCA2PrivateKeySpec keySpec) Constructor (used by the McElieceCCA2KeyFactory).

Method Summary

boolean	equals(java.lang.Object other) Compare this key with another object.
java.lang.String	getAlgorithm() Return the name of the algorithm.
protected codec.asn1.ASN1Type	getAlgParams()
protected GF2mField	getField()
protected PolynomialGF2mSmallM	getGoppaPoly()
protected GF2Matrix	getH()
protected int	getK()
protected byte[]	getKeyData() Return the keyData to encode in the SubjectPublicKeyInfo structure.
protected int	getN()
protected codec.asn1.ASN1ObjectIdentifier	getOID()
protected Permutation	getP()
protected PolynomialGF2mSmallM[]	getQInv()
protected int	getT()
int	hashCode()
java.lang.String	toString()

Methods inherited from class de.flexiprovider.api.keys.PrivateKey

getEncoded, getFormat

Methods inherited from class java.lang.Object

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

Constructor Detail

McElieceCCA2PrivateKey

protected McElieceCCA2PrivateKey(int n,
                                 int k,
                                 GF2mField field,
                                 PolynomialGF2mSmallM gp,
                                 Permutation p,
                                 GF2Matrix h,
                                 PolynomialGF2mSmallM[] qInv)

Constructor (used by the McElieceCCA2KeyPairGenerator).

Parameters:

n - the length of the code

k - the dimension of the code

field - the field polynomial

gp - the irreducible Goppa polynomial

p - the permutation

h - the canonical check matrix

qInv - the matrix used to compute square roots in (GF(2^m))^t

McElieceCCA2PrivateKey

protected McElieceCCA2PrivateKey(McElieceCCA2PrivateKeySpec keySpec)

Constructor (used by the McElieceCCA2KeyFactory).

Parameters:

keySpec - a McElieceCCA2PrivateKeySpec

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Return the name of the algorithm.

Returns:

"McEliece"

getN

protected int getN()

Returns:

the length of the code

getK

protected int getK()

Returns:

the dimension of the code

getT

protected int getT()

Returns:

the degree of the Goppa polynomial (error correcting capability)

getField

protected GF2mField getField()

Returns:

the finite field

getGoppaPoly

protected PolynomialGF2mSmallM getGoppaPoly()

Returns:

the irreducible Goppa polynomial

getP

protected Permutation getP()

Returns:

the permutation vector

getH

protected GF2Matrix getH()

Returns:

the canonical check matrix

getQInv

protected PolynomialGF2mSmallM[] getQInv()

Returns:

the matrix used to compute square roots in (GF(2^m))^t

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a human readable form of the key

equals

public boolean equals(java.lang.Object other)

Compare this key with another object.

Overrides:

equals in class java.lang.Object

Parameters:

other - the other object

Returns:

the result of the comparison

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

Returns:

the hash code of this key

getOID

protected codec.asn1.ASN1ObjectIdentifier getOID()

Overrides:

getOID in class PrivateKey

Returns:

the OID to encode in the SubjectPublicKeyInfo structure

getAlgParams

protected codec.asn1.ASN1Type getAlgParams()

Overrides:

getAlgParams in class PrivateKey

Returns:

the algorithm parameters to encode in the SubjectPublicKeyInfo structure

getKeyData

protected byte[] getKeyData()

Return the keyData to encode in the SubjectPublicKeyInfo structure.

The ASN.1 definition of the key structure is

   McEliecePrivateKey ::= SEQUENCE {
     m             INTEGER                  -- extension degree of the field
     k             INTEGER                  -- dimension of the code
     field         OCTET STRING             -- field polynomial
     goppaPoly     OCTET STRING             -- irreducible Goppa polynomial
     p             OCTET STRING             -- permutation vector
     matrixH       OCTET STRING             -- canonical check matrix
     sqRootMatrix  SEQUENCE OF OCTET STRING -- square root matrix	
   }
 

Overrides:

getKeyData in class PrivateKey

Returns:

the keyData to encode in the SubjectPublicKeyInfo structure