McElieceFujisakiCipher (Bouncy Castle Library 1.68 API Specification)

java.lang.Object
- 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

Fields
Modifier and Type Field Description

static java.lang.String OID
The OID of the algorithm.

Constructor Summary

Constructors
Constructor Description

McElieceFujisakiCipher()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getKeySize(McElieceCCA2KeyParameters key)`
`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
  - McElieceFujisakiCipher
```
public McElieceFujisakiCipher()
```
- 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)
               throws java.lang.IllegalArgumentException
```
    Throws:
    
    java.lang.IllegalArgumentException
  - 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