Package org.bouncycastle.crypto.kems

Class ECIESKEMExtractor

java.lang.Object

org.bouncycastle.crypto.kems.ECIESKEMExtractor

All Implemented Interfaces:

EncapsulatedSecretExtractor

public class ECIESKEMExtractor
extends Object
implements EncapsulatedSecretExtractor

The ECIES Key Encapsulation Mechanism (ECIES-KEM) from ISO 18033-2.

Constructor Summary

Constructors

Constructor	Description
ECIESKEMExtractor(ECPrivateKeyParameters decKey, int keyLen, DerivationFunction kdf)	Set up the ECIES-KEM.
ECIESKEMExtractor(ECPrivateKeyParameters decKey, int keyLen, DerivationFunction kdf, boolean cofactorMode, boolean oldCofactorMode, boolean singleHashMode)	Set up the ECIES-KEM.

Method Summary

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 Details

ECIESKEMExtractor

public ECIESKEMExtractor(ECPrivateKeyParameters decKey,
 int keyLen,
 DerivationFunction kdf)

Set up the ECIES-KEM.

Parameters:

decKey - the decryption key.

keyLen - length in bytes of key to generate.

kdf - the key derivation function to be used.

ECIESKEMExtractor

public ECIESKEMExtractor(ECPrivateKeyParameters decKey,
 int keyLen,
 DerivationFunction kdf,
 boolean cofactorMode,
 boolean oldCofactorMode,
 boolean singleHashMode)

Set up the ECIES-KEM.

Parameters:

decKey - the decryption key.

keyLen - length in bytes of key to generate.

kdf - the key derivation function to be used.

cofactorMode - if true use the new cofactor ECDH.

oldCofactorMode - if true use the old cofactor ECDH.

singleHashMode - if true use single hash mode.

Method Details

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.