org.bouncycastle.pqc.crypto.ntru
Class NTRUSigner

java.lang.Object
  org.bouncycastle.pqc.crypto.ntru.NTRUSigner

public class NTRUSigner
extends java.lang.Object

Signs, verifies data and generates key pairs.

Constructor Summary

NTRUSigner(NTRUSigningParameters params)
Constructs a new instance with a set of signature parameters.

Method Summary

protected IntegerPolynomial	createMsgRep(byte[] msgHash, int r)
byte[]	generateSignature() 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) Resets the engine for signing a message.
void	update(byte b) Adds data to sign or verify.
void	update(byte[] m, int off, int length) Adds data to sign or verify.
boolean	verifySignature(byte[] sig) 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)

Constructs a new instance with a set of signature parameters.

Parameters:

params - signature parameters

Method Detail

init

public void init(boolean forSigning,
                 CipherParameters params)

Resets the engine for signing a message.

Parameters:

forSigning -

params -

update

public void update(byte b)

Adds data to sign or verify.

Parameters:

b - data

update

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

Adds data to sign or verify.

Parameters:

m - data

off - offset

length - number of bytes

generateSignature

public byte[] generateSignature()

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)

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)