NTRUPlusKEMExtractor (Bouncy Castle Library 1.86 API Specification)

java.lang.Object
- org.bouncycastle.pqc.crypto.ntruplus.NTRUPlusKEMExtractor

All Implemented Interfaces:

EncapsulatedSecretExtractor
```
public class NTRUPlusKEMExtractor
extends java.lang.Object
implements EncapsulatedSecretExtractor
```
NTRU+ decapsulation.
Not thread safe. The NTRUPlusEngine built here keeps one SHAKE instance in a field, so two threads sharing an extractor interleave its absorb and squeeze phases: the secrets they recover do not match the sender's, and an IllegalStateException from the digest is also possible. Give each thread its own extractor - construction is cheap, roughly a thousandth of a decapsulation. The KEM.Decapsulator that javax.crypto.KEM builds does exactly that, since that API requires decapsulate to be safe for concurrent use.

Constructor Summary

Constructors
Constructor Description

NTRUPlusKEMExtractor(NTRUPlusPrivateKeyParameters privateKey)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`extractSecret(byte[] encapsulation)`	Extract the secret based on the recipient private key.
`int`	`getEncapsulationLength()`	Return the length in bytes of the encapsulation.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NTRUPlusKEMExtractor
```
public NTRUPlusKEMExtractor(NTRUPlusPrivateKeyParameters privateKey)
```
- Method Detail
  - extractSecret
```
public byte[] extractSecret(byte[] encapsulation)
```
    Description copied from interface: EncapsulatedSecretExtractor
    
    Extract the secret based on the recipient private key.
    
    Specified by:
    
    extractSecret in interface EncapsulatedSecretExtractor
    
    Parameters:
    
    encapsulation - the encapsulated secret.
  - getEncapsulationLength
```
public int getEncapsulationLength()
```
    Description copied from interface: EncapsulatedSecretExtractor
    
    Return the length in bytes of the encapsulation.
    
    Specified by:
    
    getEncapsulationLength in interface EncapsulatedSecretExtractor
    
    Returns:
    
    length in bytes of an encapsulation for this parameter set.