Bouncy Castle Cryptography Library 1.48

org.bouncycastle.pqc.crypto.mceliece
Class McElieceFujisakiCipher

java.lang.Object
  extended by org.bouncycastle.pqc.crypto.mceliece.McElieceFujisakiCipher
All Implemented Interfaces:
MessageEncryptor

public class McElieceFujisakiCipher
extends java.lang.Object
implements MessageEncryptor

This class implements the Fujisaki/Okamoto conversion of the McEliecePKCS. Fujisaki and Okamoto propose hybrid encryption that merges a symmetric encryption scheme which is secure in the find-guess model with an asymmetric one-way encryption scheme which is sufficiently probabilistic to obtain a public key cryptosystem 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
static java.lang.String OID
          The OID of the algorithm.
 
Constructor Summary
McElieceFujisakiCipher()
           
 
Method Summary
 int getKeySize(McElieceCCA2KeyParameters key)
           
 void init(boolean forSigning, 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
Constructor Detail

McElieceFujisakiCipher

public McElieceFujisakiCipher()
Method Detail

init

public void init(boolean forSigning,
                 CipherParameters param)
Specified by:
init in interface MessageEncryptor
Parameters:
forSigning - true if we are encrypting a signature, false otherwise.
param - key parameters for encryption or decryption.

getKeySize

public int getKeySize(McElieceCCA2KeyParameters key)
               throws java.lang.IllegalArgumentException
Throws:
java.lang.IllegalArgumentException

initCipherDecrypt

public void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey)

messageEncrypt

public byte[] messageEncrypt(byte[] input)
                      throws java.lang.Exception
Specified by:
messageEncrypt in interface MessageEncryptor
Parameters:
input - the message to be signed.
Throws:
java.lang.Exception

messageDecrypt

public byte[] messageDecrypt(byte[] input)
                      throws java.lang.Exception
Specified by:
messageDecrypt in interface MessageEncryptor
Parameters:
input - the cipher text of the message
Throws:
java.lang.Exception

Bouncy Castle Cryptography Library 1.48