com.arxanfintech.common.crypto

Class PrivateKey

java.lang.Object

com.arxanfintech.common.crypto.PrivateKey

All Implemented Interfaces:

Key

public class PrivateKey
extends Object
implements Key

An EC Private Key, technically a big positive integer capable of signing such that the signature can be verified with the corresponding EC Public Key

See Also:

PublicKey

Method Summary

Modifier and Type	Method and Description
static PrivateKey	createNew(Cryptography crypto)
boolean	equals(Object obj)
PublicKey	getPublic()
int	hashCode()
PrivateKey	offsetKey(BigInteger offset) Return a key computable for this key with an offset.
byte[]	sign(byte[] hash) Sign a digest with this key.
byte[]	toByteArray() Safe access to the key's internal representation
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

createNew

public static PrivateKey createNew(Cryptography crypto)

toByteArray

public byte[] toByteArray()

Description copied from interface: Key

Safe access to the key's internal representation

Specified by:

toByteArray in interface Key

Returns:

a copy of the key's internal representation

getPublic

public PublicKey getPublic()

Returns:

the corresponding public key

sign

public byte[] sign(byte[] hash)

Sign a digest with this key.

Parameters:

hash - arbitrary data

Returns:

signature

toString

public String toString()

Overrides:

toString in class Object

offsetKey

public PrivateKey offsetKey(BigInteger offset)

Description copied from interface: Key

Return a key computable for this key with an offset. Due to a homomorphic property of EC one may compute the offset key of both private and public keys independently such that they build a valid new pair.

Specified by:

offsetKey in interface Key

Parameters:

offset - offset

Returns:

a key derived of this with an offset.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object