org.spongycastle.pqc.crypto.ntru

Class NTRUEncryptionPrivateKeyParameters

java.lang.Object

org.spongycastle.crypto.params.AsymmetricKeyParameter

org.spongycastle.pqc.crypto.ntru.NTRUEncryptionKeyParameters

org.spongycastle.pqc.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 and Description
IntegerPolynomial	fp
IntegerPolynomial	h
Polynomial	t

Fields inherited from class org.spongycastle.pqc.crypto.ntru.NTRUEncryptionKeyParameters

params

Constructor Summary

Constructors

Constructor and Description
NTRUEncryptionPrivateKeyParameters(byte[] b, NTRUEncryptionParameters params) Converts a byte array to a polynomial f and constructs a new private key
NTRUEncryptionPrivateKeyParameters(java.io.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 and Description
boolean	equals(java.lang.Object obj)
byte[]	getEncoded() Converts the key to a byte array
int	hashCode()
void	writeTo(java.io.OutputStream os) Writes the key to an output stream

Methods inherited from class org.spongycastle.pqc.crypto.ntru.NTRUEncryptionKeyParameters

getParameters

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

isPrivate

Methods inherited from class java.lang.Object

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

Field Detail

t

public Polynomial t

fp

public IntegerPolynomial fp

h

public IntegerPolynomial h

Constructor Detail

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 java.io.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:

java.io.IOException

See Also:

getEncoded()

NTRUEncryptionPrivateKeyParameters

public NTRUEncryptionPrivateKeyParameters(java.io.InputStream is,
                                          NTRUEncryptionParameters params)
                                   throws java.io.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:

java.io.IOException

See Also:

writeTo(OutputStream)

Method Detail

getEncoded

public byte[] getEncoded()

Converts the key to a byte array

Returns:

the encoded key

See Also:

NTRUEncryptionPrivateKeyParameters(byte[], NTRUEncryptionParameters)

writeTo

public void writeTo(java.io.OutputStream os)
             throws java.io.IOException

Writes the key to an output stream

Parameters:

os - an output stream

Throws:

java.io.IOException

See Also:

NTRUEncryptionPrivateKeyParameters(InputStream, NTRUEncryptionParameters)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object