PrivateKey (I2P Anonymous Network - Java Documentation

java.lang.Object
- net.i2p.data.DataStructureImpl
- - net.i2p.data.SimpleDataStructure
  - - net.i2p.data.PrivateKey

All Implemented Interfaces:

Serializable, DataStructure
```
public class PrivateKey
extends SimpleDataStructure
```
Defines the PrivateKey as defined by the I2P data structure spec. A private key is 256byte Integer. The private key represents only the exponent, not the primes, which are constant and defined in the crypto spec. Note that we use short exponents, so all but the last 28.25 bytes are zero. See http://www.i2p2.i2p/how_cryptography for details.

Author:

jrandom

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

static int KEYSIZE_BYTES
- Fields inherited from class net.i2p.data.SimpleDataStructure
  _data

Fields
Modifier and Type	Field	Description
`static int`	`KEYSIZE_BYTES`

Constructor Summary

Constructors
Constructor Description

PrivateKey()

PrivateKey(byte[] data)

PrivateKey(String base64Data)
constructs from base64

Constructors
Constructor	Description
`PrivateKey()`
`PrivateKey(byte[] data)`
`PrivateKey(String base64Data)`	constructs from base64

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`	Warning - this returns true for two different classes with the same size and same data, e.g.
`int`	`hashCode()`	We assume the data has enough randomness in it, so use the last 4 bytes for speed.
`int`	`length()`	The legal length of the byte array in this data structure
`PublicKey`	`toPublic()`	derives a new PublicKey object derived from the secret contents of this PrivateKey

Methods inherited from class net.i2p.data.DataStructureImpl
read

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

Methods inherited from class net.i2p.data.SimpleDataStructure
calculateHash, fromBase64, fromByteArray, getData, readBytes, setData, toBase64, toByteArray, toString, writeBytes

- Field Detail
  - KEYSIZE_BYTES
```
public static final int KEYSIZE_BYTES
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - PrivateKey
```
public PrivateKey()
```
  - PrivateKey
```
public PrivateKey(byte[] data)
```
  - PrivateKey
```
public PrivateKey(String base64Data)
           throws DataFormatException
```
    constructs from base64
    
    Parameters:
    
    base64Data - a string of base64 data (the output of .toBase64() called on a prior instance of PrivateKey
    
    Throws:
    
    DataFormatException
- Method Detail
  - length
```
public int length()
```
    Description copied from class: SimpleDataStructure
    
    The legal length of the byte array in this data structure
    
    Specified by:
    
    length in class SimpleDataStructure
  - toPublic
```
public PublicKey toPublic()
```
    derives a new PublicKey object derived from the secret contents of this PrivateKey
    
    Returns:
    
    a PublicKey object
    
    Throws:
    
    IllegalArgumentException - on bad key
  - hashCode
```
public int hashCode()
```
    We assume the data has enough randomness in it, so use the last 4 bytes for speed. Overridden since we use short exponents, so the first 227 bytes are all zero.
    
    Overrides:
    
    hashCode in class SimpleDataStructure
  - equals
```
public boolean equals(Object obj)
```
    Description copied from class: SimpleDataStructure
    
    Warning - this returns true for two different classes with the same size and same data, e.g. SessionKey and SessionTag, but you wouldn't put them in the same Set, would you?
    
    Overrides:
    
    equals in class SimpleDataStructure

Class PrivateKey

Field Summary

Fields inherited from class net.i2p.data.SimpleDataStructure

Constructor Summary

Method Summary

Methods inherited from class net.i2p.data.DataStructureImpl

Methods inherited from class java.lang.Object

Methods inherited from class net.i2p.data.SimpleDataStructure

Field Detail

KEYSIZE_BYTES

Constructor Detail

PrivateKey

PrivateKey

PrivateKey

Method Detail

length

toPublic

hashCode

equals