Package cryptography

Class HybridCryptography

java.lang.Object

cryptography.HybridCryptography

public class HybridCryptography
extends java.lang.Object

Constructor Summary

Constructors

Constructor	Description
HybridCryptography()

Method Summary

Modifier and Type	Method	Description
static java.lang.String	decrypt(EncryptionPacket packet, java.security.PrivateKey key, byte[] aadData)	Attempts to decrypt the string using both symmetric and asymmetric techniques
static java.lang.String[]	encrypt(java.lang.String input, java.security.PublicKey key, javax.crypto.spec.GCMParameterSpec gcmParamSpec, byte[] aadData)	Attempts to encrypt the string using both symmetric and asymmetric techniques
static java.security.KeyPair	generateKeys()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HybridCryptography

public HybridCryptography()

Method Detail

generateKeys

public static java.security.KeyPair generateKeys()
                                          throws java.security.NoSuchAlgorithmException

Returns:

Asymmetric KeyPair used for RSA encryption/decryption

Throws:

java.security.NoSuchAlgorithmException - if someone messed with the code and changed the algorithm to one that is invalid

encrypt

public static java.lang.String[] encrypt(java.lang.String input,
                                         java.security.PublicKey key,
                                         javax.crypto.spec.GCMParameterSpec gcmParamSpec,
                                         byte[] aadData)

Attempts to encrypt the string using both symmetric and asymmetric techniques

Parameters:

input - String input that is to be encrypted

key - PublicKey used for asymmetric encryption

gcmParamSpec - GCM Parameter Specifications used for the encryption

aadData - extra data tag to be included within the final encryption

Returns:

String array of [ asymmetrically encrypted symmetric encryption key , symmetrically encrypted data ]

decrypt

public static java.lang.String decrypt(EncryptionPacket packet,
                                       java.security.PrivateKey key,
                                       byte[] aadData)
                                throws java.lang.Exception

Attempts to decrypt the string using both symmetric and asymmetric techniques

Parameters:

packet - EncryptionPacket that contains the encrypted data

key - PrivateKey used for the asymmetric decryption

aadData - the extra data tag used during the encryption

Returns:

the original decrypted String

Throws:

java.lang.Exception