Package org.bouncycastle.pqc.legacy.crypto.ntru

Class NTRUEncryptionPrivateKeyParameters

java.lang.Object

org.bouncycastle.crypto.params.AsymmetricKeyParameter

org.bouncycastle.pqc.legacy.crypto.ntru.NTRUEncryptionKeyParameters

org.bouncycastle.pqc.legacy.crypto.ntru.NTRUEncryptionPrivateKeyParameters

All Implemented Interfaces:

CipherParameters

public class NTRUEncryptionPrivateKeyParameters
extends NTRUEncryptionKeyParameters

A NtruEncrypt private key is essentially a polynomial named f which takes different forms depending on whether product-form polynomials are used, and on fastP
The inverse of f modulo p is precomputed on initialization.

Field Summary

Fields

Modifier and Type	Field	Description
IntegerPolynomial	fp
IntegerPolynomial	h
Polynomial	t

Fields inherited from class org.bouncycastle.pqc.legacy.crypto.ntru.NTRUEncryptionKeyParameters

params

Constructor Summary

Constructors

Constructor	Description
NTRUEncryptionPrivateKeyParameters(byte[] b, NTRUEncryptionParameters params)	Converts a byte array to a polynomial f and constructs a new private key
NTRUEncryptionPrivateKeyParameters(InputStream is, NTRUEncryptionParameters params)	Reads a polynomial f from an input stream and constructs a new private key
NTRUEncryptionPrivateKeyParameters(IntegerPolynomial h, Polynomial t, IntegerPolynomial fp, NTRUEncryptionParameters params)	Constructs a new private key from a polynomial

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
byte[]	getEncoded()	Converts the key to a byte array
int	hashCode()
void	writeTo(OutputStream os)	Writes the key to an output stream

Methods inherited from class org.bouncycastle.pqc.legacy.crypto.ntru.NTRUEncryptionKeyParameters

getParameters

Methods inherited from class org.bouncycastle.crypto.params.AsymmetricKeyParameter

isPrivate

Methods inherited from class java.lang.Object

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

Field Details

t

public Polynomial t

fp

public IntegerPolynomial fp

h

public IntegerPolynomial h

Constructor Details

NTRUEncryptionPrivateKeyParameters

public NTRUEncryptionPrivateKeyParameters(IntegerPolynomial h,
 Polynomial t,
 IntegerPolynomial fp,
 NTRUEncryptionParameters params)

Constructs a new private key from a polynomial

Parameters:

h - the public polynomial for the key.

t - the polynomial which determines the key: if fastFp=true, f=1+3t; otherwise, f=t

fp - the inverse of f

params - the NtruEncrypt parameters to use

NTRUEncryptionPrivateKeyParameters

public NTRUEncryptionPrivateKeyParameters(byte[] b,
 NTRUEncryptionParameters params)
                                   throws IOException

Converts a byte array to a polynomial f and constructs a new private key

Parameters:

b - an encoded polynomial

params - the NtruEncrypt parameters to use

Throws:

IOException

See Also:

• getEncoded()

NTRUEncryptionPrivateKeyParameters

public NTRUEncryptionPrivateKeyParameters(InputStream is,
 NTRUEncryptionParameters params)
                                   throws IOException

Reads a polynomial f from an input stream and constructs a new private key

Parameters:

is - an input stream

params - the NtruEncrypt parameters to use

Throws:

IOException

See Also:

• writeTo(OutputStream)

Method Details

getEncoded

public byte[] getEncoded()

Converts the key to a byte array

Returns:

the encoded key

See Also:

• NTRUEncryptionPrivateKeyParameters(byte[], NTRUEncryptionParameters)

writeTo

public void writeTo(OutputStream os)
             throws IOException

Writes the key to an output stream

Parameters:

os - an output stream

Throws:

IOException

See Also:

• NTRUEncryptionPrivateKeyParameters(InputStream, NTRUEncryptionParameters)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object