org.openzen.zengarden.security

Interface ZPrivateKey

public interface ZPrivateKey

Contains a private key. Private keys can be used to decrypt data previously encrypted with the matching public key, to create a signature, or to setup a channel in combination with the other party's public key.

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(byte[] data) Decrypts the given byte array.
byte[]	encode() Encodes this key in binary form.
ZSymmetricKey	makeKey(ZPublicKey otherPartyPublicKey) Combines this key with a public key to generate a symmetric key.
byte[]	sign(byte[] data) Creates a signature for the given data.

Method Detail

encode

byte[] encode()

Encodes this key in binary form. Note that this form is not standardized, but can be used by the ZCoder to reconstruct the key.

Returns:

encoded key

makeKey

ZSymmetricKey makeKey(ZPublicKey otherPartyPublicKey)

Combines this key with a public key to generate a symmetric key. A symmetric key can be used to initialize an efficient encryptor or decryptor. Uses ECDH.

Parameters:

otherPartyPublicKey - public key of the communicating party

Returns:

symmetric key

decrypt

byte[] decrypt(byte[] data)

Decrypts the given byte array. The data must have been previously encoded with the matching public key. Note that this method is rather inefficient; for large amounts of data, use a symmetric key instead.

Parameters:

data - encrypted data

Returns:

decrypted data

sign

byte[] sign(byte[] data)

Creates a signature for the given data. This signature can be validated by anyone with the matching public key.

Parameters:

data - data to be signed

Returns:

signature