McElieceCipher (Bouncy Castle Library 1.60 API Specification)

java.lang.Object
- org.bouncycastle.pqc.crypto.mceliece.McElieceCipher

All Implemented Interfaces:

MessageEncryptor
```
public class McElieceCipher
extends java.lang.Object
implements MessageEncryptor
```
This class implements the McEliece Public Key cryptosystem (McEliecePKCS). It was first described in R.J. McEliece, "A public key cryptosystem based on algebraic coding theory", DSN progress report, 42-44:114-116, 1978. The McEliecePKCS is the first cryptosystem which is based on error correcting codes. The trapdoor for the McEliece cryptosystem using Goppa codes is the knowledge of the Goppa polynomial used to generate the code.

Field Summary

Fields
Modifier and Type Field Description

int cipherTextSize

int maxPlainTextSize

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

Fields
Modifier and Type	Field	Description
`int`	`cipherTextSize`
`int`	`maxPlainTextSize`
`static java.lang.String`	`OID`	The OID of the algorithm.

Constructor Summary

Constructors
Constructor Description

McElieceCipher()

Constructors
Constructor	Description
`McElieceCipher()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getKeySize(McElieceKeyParameters key)`	Return the key size of the given key object.
`void`	`init(boolean forEncryption, CipherParameters param)`
`byte[]`	`messageDecrypt(byte[] input)`	Decrypt a cipher text.
`byte[]`	`messageEncrypt(byte[] input)`	Encrypt a plain text.

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
  - maxPlainTextSize
```
public int maxPlainTextSize
```
  - cipherTextSize
```
public int cipherTextSize
```
- Constructor Detail
  - McElieceCipher
```
public McElieceCipher()
```
- 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(McElieceKeyParameters key)
```
    Return the key size of the given key object.
    
    Parameters:
    
    key - the McElieceKeyParameters object
    
    Returns:
    
    the keysize of the given key object
  - messageEncrypt
```
public byte[] messageEncrypt(byte[] input)
```
    Encrypt a plain text.
    
    Specified by:
    
    messageEncrypt in interface MessageEncryptor
    
    Parameters:
    
    input - the plain text
    
    Returns:
    
    the cipher text
  - messageDecrypt
```
public byte[] messageDecrypt(byte[] input)
                      throws InvalidCipherTextException
```
    Decrypt a cipher text.
    
    Specified by:
    
    messageDecrypt in interface MessageEncryptor
    
    Parameters:
    
    input - the cipher text
    
    Returns:
    
    the plain text
    
    Throws:
    
    InvalidCipherTextException - if the cipher text is invalid.

Class McElieceCipher

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

OID

maxPlainTextSize

cipherTextSize

Constructor Detail

McElieceCipher

Method Detail

init

getKeySize

messageEncrypt

messageDecrypt