org.bouncycastle.pqc.jcajce.provider.mceliece

Class BCMcEliecePrivateKey

java.lang.Object

org.bouncycastle.pqc.jcajce.provider.mceliece.BCMcEliecePrivateKey

All Implemented Interfaces:

Serializable, Key, PrivateKey, Destroyable, CipherParameters

public class BCMcEliecePrivateKey
extends Object
implements CipherParameters, PrivateKey

This class implements a McEliece private key and is usually instantiated by the McElieceKeyPairGenerator or McElieceKeyFactorySpi.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BCMcEliecePrivateKey(McEliecePrivateKeyParameters params)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Compare this key with another object.
String	getAlgorithm() Return the name of the algorithm.
byte[]	getEncoded() Return the key data to encode in the SubjectPublicKeyInfo structure.
GF2mField	getField()
String	getFormat()
PolynomialGF2mSmallM	getGoppaPoly()
GF2Matrix	getH()
int	getK()
int	getN()
Permutation	getP1()
Permutation	getP2()
PolynomialGF2mSmallM[]	getQInv()
GF2Matrix	getSInv()
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.security.auth.Destroyable

destroy, isDestroyed

Constructor Detail

BCMcEliecePrivateKey

public BCMcEliecePrivateKey(McEliecePrivateKeyParameters params)

Method Detail

getAlgorithm

public String getAlgorithm()

Return the name of the algorithm.

Specified by:

getAlgorithm in interface Key

Returns:

"McEliece"

getN

public int getN()

Returns:

the length of the code

getK

public int getK()

Returns:

the dimension of the code

getField

public GF2mField getField()

Returns:

the finite field

getGoppaPoly

public PolynomialGF2mSmallM getGoppaPoly()

Returns:

the irreducible Goppa polynomial

getSInv

public GF2Matrix getSInv()

Returns:

the k x k random binary non-singular matrix S

getP1

public Permutation getP1()

Returns:

the permutation used to generate the systematic check matrix

getP2

public Permutation getP2()

Returns:

the permutation used to compute the public generator matrix

getH

public GF2Matrix getH()

Returns:

the canonical check matrix

getQInv

public PolynomialGF2mSmallM[] getQInv()

Returns:

the matrix for computing square roots in (GF(2^m))^t

equals

public boolean equals(Object other)

Compare this key with another object.

Overrides:

equals in class Object

Parameters:

other - the other object

Returns:

the result of the comparison

hashCode

public int hashCode()

Overrides:

hashCode in class Object

Returns:

the hash code of this key

getEncoded

public byte[] getEncoded()

Return the key data to encode in the SubjectPublicKeyInfo structure.

The ASN.1 definition of the key structure is

   McEliecePrivateKey ::= SEQUENCE {
     n          INTEGER                   -- length of the code
     k          INTEGER                   -- dimension of the code
     fieldPoly  OCTET STRING              -- field polynomial defining GF(2ˆm)
     getGoppaPoly()  OCTET STRING              -- irreducible Goppa polynomial
     sInv       OCTET STRING              -- matrix Sˆ-1
     p1         OCTET STRING              -- permutation P1
     p2         OCTET STRING              -- permutation P2
     h          OCTET STRING              -- canonical check matrix
     qInv       SEQUENCE OF OCTET STRING  -- matrix used to compute square roots
   }
 

Specified by:

getEncoded in interface Key

Returns:

the key data to encode in the SubjectPublicKeyInfo structure

getFormat

public String getFormat()

Specified by:

getFormat in interface Key