Package com.iizix.server.client
Class DHKey
java.lang.Object
com.iizix.server.client.DHKey
Class used to generate a 2048 bits key for password transport over unsecured HTTP transactions.
- Author:
- Christopher Mindus
Constructor Summary
ConstructorsMethod Summary
Modifier and TypeMethodDescriptionvoidassignClientPublicKey(String publicKey) Assigns the Client's public key.byte[]Decrypts an encoded string from the client using the two public keys.voidencrypt(byte[] data, SendTransaction sendTrans) Encrypts and appends the bytes to the SendTransaction.static IvParameterSpecGets the IV parameter.Gets the Server's public key.
Constructor Details
DHKey
public DHKey()Constructs the instance creating the server's key only. The client "Alice" public key must be provided later.
Method Details
getIvParameterSpec
Gets the IV parameter.assignClientPublicKey
Assigns the Client's public key.- Parameters:
publicKey- The "Alice" public key as a hexadecimal number.- Throws:
IllegalArgumentException- If the public key is invalid.
getServerPublicKey
Gets the Server's public key.- Returns:
- The server's public key as a hexadecimal number.
encrypt
Encrypts and appends the bytes to the SendTransaction.- Parameters:
data- The data to encrypt.sendTrans- The send transaction.- Throws:
Exception- For errors.
decrypt
public byte[] decrypt(String clientPublicKey, String encryptedString) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException Decrypts an encoded string from the client using the two public keys.- Parameters:
clientPublicKey- The client public key.encryptedString- The encrypted string encoded as a Base 64 string.- Returns:
- The decrypted string.
- Throws:
InvalidAlgorithmParameterExceptionInvalidKeyExceptionNoSuchPaddingExceptionNoSuchAlgorithmExceptionBadPaddingExceptionIllegalBlockSizeExceptionUnsupportedEncodingException