org.bouncycastle.pqc.legacy.crypto.mceliece
Class McElieceKobaraImaiCipher

java.lang.Object
  org.bouncycastle.pqc.legacy.crypto.mceliece.McElieceKobaraImaiCipher

All Implemented Interfaces:

MessageEncryptor

public class McElieceKobaraImaiCipher

extends java.lang.Object

implements MessageEncryptor

This class implements the Kobara/Imai conversion of the McEliecePKCS. This is a conversion of the McEliecePKCS which is CCA2-secure. For details, see D. Engelbert, R. Overbeck, A. Schmidt, "A Summary of McEliece-Type Cryptosystems and their Security", technical report. https://www.degruyter.com/document/doi/10.1515/JMC.2007.009/html

Field Summary

static java.lang.String

OID The OID of the algorithm.

Constructor Summary

McElieceKobaraImaiCipher()

Method Summary

int	getKeySize(McElieceCCA2KeyParameters key) Return the key size of the given key object.
static byte[]	getPublicConstant()
void	init(boolean forEncryption, CipherParameters param)
byte[]	messageDecrypt(byte[] input)
byte[]	messageEncrypt(byte[] input)

Methods inherited from class java.lang.Object

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

Field Detail

OID

public static final java.lang.String OID

The OID of the algorithm.

See Also:

Constant Field Values

Constructor Detail

McElieceKobaraImaiCipher

public McElieceKobaraImaiCipher()

Method Detail

getPublicConstant

public static byte[] getPublicConstant()

init

public void init(boolean forEncryption,
                 CipherParameters param)

Specified by:

init in interface MessageEncryptor

Parameters:

forEncryption - true if we are encrypting a signature, false otherwise.

param - key parameters for encryption or decryption.

getKeySize

public int getKeySize(McElieceCCA2KeyParameters key)

Return the key size of the given key object.

Parameters:

key - the McElieceCCA2KeyParameters object

Returns:

the key size of the given key object

messageEncrypt

public byte[] messageEncrypt(byte[] input)

Specified by:

messageEncrypt in interface MessageEncryptor

Parameters:

input - the message to be signed.

messageDecrypt

public byte[] messageDecrypt(byte[] input)
                      throws InvalidCipherTextException

Specified by:

messageDecrypt in interface MessageEncryptor

Parameters:

input - the cipher text of the message

Throws:

InvalidCipherTextException