ElGamalPublicKeyImpl (Javadocs [I2P+ 2.13.0+]

java.lang.Object
- net.i2p.crypto.elgamal.impl.ElGamalPublicKeyImpl

All Implemented Interfaces:
Serializable, Key, PublicKey, DHKey, DHPublicKey, ElGamalKey, ElGamalPublicKey
```
public class ElGamalPublicKeyImpl
extends Object
implements ElGamalPublicKey, DHPublicKey
```
Implementation of ElGamal public keys. This class provides a concrete implementation of the ElGamalPublicKey interface, representing the public component of an ElGamal key pair. It stores the public value y = g^x mod p and the ElGamal parameters (prime p and generator g), and supports X.509 encoding for standardized key storage and transmission.
See Also:
Serialized Form

Constructor Summary

Constructors
Constructor and Description
`ElGamalPublicKeyImpl(BigInteger y, ElGamalParameterSpec elSpec)` ElGamalPublicKeyImpl.
`ElGamalPublicKeyImpl(DHPublicKey key)` ElGamalPublicKeyImpl.
`ElGamalPublicKeyImpl(DHPublicKeySpec spec)` ElGamalPublicKeyImpl.
`ElGamalPublicKeyImpl(ElGamalPublicKey key)` ElGamalPublicKeyImpl.
`ElGamalPublicKeyImpl(ElGamalPublicKeySpec spec)` ElGamalPublicKeyImpl.
`ElGamalPublicKeyImpl(X509EncodedKeySpec spec)` ElGamalPublicKeyImpl.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object obj)` True if the keys are equal.
`String`	`getAlgorithm()` Algorithm.
`byte[]`	`getEncoded()` Encoded.
`String`	`getFormat()` Format.
`ElGamalParameterSpec`	`getParameters()` Parameters.
`DHParameterSpec`	`getParams()` Params.
`BigInteger`	`getY()` Y.
`int`	`hashCode()` Whether h code is present.
`(package private) static int`	`spaceFor(int val)` Calculate the TLV space for a value of the given length.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ElGamalPublicKeyImpl
```
public ElGamalPublicKeyImpl(BigInteger y,
                            ElGamalParameterSpec elSpec)
```
    ElGamalPublicKeyImpl.
    Parameters:
    y - the public value y = g^x mod p
    elSpec - the ElGamal parameters
  - ElGamalPublicKeyImpl
```
public ElGamalPublicKeyImpl(DHPublicKey key)
```
    ElGamalPublicKeyImpl.
    Parameters:
    key - the DH public key to copy
  - ElGamalPublicKeyImpl
```
public ElGamalPublicKeyImpl(DHPublicKeySpec spec)
```
    ElGamalPublicKeyImpl.
    Parameters:
    spec - the DH public key spec
  - ElGamalPublicKeyImpl
```
public ElGamalPublicKeyImpl(ElGamalPublicKey key)
```
    ElGamalPublicKeyImpl.
    Parameters:
    key - the ElGamal public key to copy
  - ElGamalPublicKeyImpl
```
public ElGamalPublicKeyImpl(ElGamalPublicKeySpec spec)
```
    ElGamalPublicKeyImpl.
    Parameters:
    spec - the ElGamal public key spec
  - ElGamalPublicKeyImpl
```
public ElGamalPublicKeyImpl(X509EncodedKeySpec spec)
                     throws InvalidKeySpecException
```
    ElGamalPublicKeyImpl.
    Parameters:
    spec - the X.509 key spec
    Throws:
    InvalidKeySpecException - always, not yet implemented
- Method Detail
  - equals
```
public boolean equals(Object obj)
```
    True if the keys are equal.
    Overrides:
    equals in class Object
    Returns:
    true if the keys are equal
  - getAlgorithm
```
public String getAlgorithm()
```
    Algorithm.
    Specified by:
    getAlgorithm in interface Key
    Returns:
    the algorithm
  - getEncoded
```
public byte[] getEncoded()
```
    Encoded.
    Specified by:
    getEncoded in interface Key
    Returns:
    the encoded
  - getFormat
```
public String getFormat()
```
    Format.
    Specified by:
    getFormat in interface Key
    Returns:
    the format
  - getParameters
```
public ElGamalParameterSpec getParameters()
```
    Parameters.
    Specified by:
    getParameters in interface ElGamalKey
    Returns:
    the parameters
  - getParams
```
public DHParameterSpec getParams()
```
    Params.
    Specified by:
    getParams in interface DHKey
    Returns:
    the params
  - getY
```
public BigInteger getY()
```
    Y.
    Specified by:
    getY in interface DHPublicKey
    Specified by:
    getY in interface ElGamalPublicKey
    Returns:
    the y
  - hashCode
```
public int hashCode()
```
    Whether h code is present.
    Overrides:
    hashCode in class Object
    Returns:
    whether h code is present
  - spaceFor
```
static int spaceFor(int val)
```
    Calculate the TLV space for a value of the given length.
    Parameters:
    val - the length of the value, 65535 max
    Returns:
    the length of the TLV

Class ElGamalPublicKeyImpl

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ElGamalPublicKeyImpl

ElGamalPublicKeyImpl

ElGamalPublicKeyImpl

ElGamalPublicKeyImpl

ElGamalPublicKeyImpl

ElGamalPublicKeyImpl

Method Detail

equals

getAlgorithm

getEncoded

getFormat

getParameters

getParams

getY

hashCode

spaceFor