org.bouncycastle.pqc.crypto.mceliece

Class McElieceKobaraImaiCipher

java.lang.Object

org.bouncycastle.pqc.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 the development of the McEliece Cryptosystem", technical report.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	OID The OID of the algorithm.
static byte[]	PUBLIC_CONSTANT A predetermined public constant.

Constructor Summary

Constructors

Constructor and Description
McElieceKobaraImaiCipher()

Method Summary

Methods

Modifier and Type	Method and Description
int	getKeySize(McElieceCCA2KeyParameters key) Return the key size of the given key object.
void	init(boolean forEncryption, CipherParameters param)
void	initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey)
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

PUBLIC_CONSTANT

public static final byte[] PUBLIC_CONSTANT

A predetermined public constant.

Constructor Detail

McElieceKobaraImaiCipher

public McElieceKobaraImaiCipher()

Method Detail

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

initCipherDecrypt

public void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey)

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