org.spongycastle.pqc.crypto.ntru

Class NTRUSigner

java.lang.Object

org.spongycastle.pqc.crypto.ntru.NTRUSigner

Deprecated.

the NTRUSigner algorithm was broken in 2012 by Ducas and Nguyen. See http://www.di.ens.fr/~ducas/NTRUSign_Cryptanalysis/DucasNguyen_Learning.pdf for details.

public class NTRUSigner
extends java.lang.Object

Signs, verifies data and generates key pairs.

Constructor Summary

Constructors

Constructor and Description
NTRUSigner(NTRUSigningParameters params) Deprecated. Constructs a new instance with a set of signature parameters.

Method Summary

Methods

Modifier and Type	Method and Description
protected IntegerPolynomial	createMsgRep(byte[] msgHash, int r) Deprecated.
byte[]	generateSignature() Deprecated. Adds data to sign and computes a signature over this data and any data previously added via update(byte[], int, int).
void	init(boolean forSigning, CipherParameters params) Deprecated. Resets the engine for signing a message.
void	update(byte b) Deprecated. Adds data to sign or verify.
void	update(byte[] m, int off, int length) Deprecated. Adds data to sign or verify.
boolean	verifySignature(byte[] sig) Deprecated. Verifies a signature for any data previously added via update(byte[], int, int).

Methods inherited from class java.lang.Object

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

Constructor Detail

NTRUSigner

public NTRUSigner(NTRUSigningParameters params)

Deprecated.

Constructs a new instance with a set of signature parameters.

Parameters:

params - signature parameters

Method Detail

init

public void init(boolean forSigning,
        CipherParameters params)

Deprecated.

Resets the engine for signing a message.

Parameters:

forSigning -

params -

update

public void update(byte b)

Deprecated.

Adds data to sign or verify.

Parameters:

b - data

update

public void update(byte[] m,
          int off,
          int length)

Deprecated.

Adds data to sign or verify.

Parameters:

m - data

off - offset

length - number of bytes

generateSignature

public byte[] generateSignature()

Deprecated.

Adds data to sign and computes a signature over this data and any data previously added via update(byte[], int, int).

Returns:

a signature

Throws:

java.lang.IllegalStateException - if initSign was not called

verifySignature

public boolean verifySignature(byte[] sig)

Deprecated.

Verifies a signature for any data previously added via update(byte[], int, int).

Parameters:

sig - a signature

Returns:

whether the signature is valid

Throws:

java.lang.IllegalStateException - if initVerify was not called

createMsgRep

protected IntegerPolynomial createMsgRep(byte[] msgHash,
                             int r)

Deprecated.