Package com.iizix.server.client

Class DHKey

  • public class DHKey
extends java.lang.Object
    Class used to generate a 2048 bits key for password transport over unsecured HTTP transactions.
    Author:
    Christopher Mindus

    • Constructor Summary

      Constructors 
      ConstructorDescription
      DHKey()
      Constructs the instance creating the server's key only.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and TypeMethodDescription
      voidassignClientPublicKey​(java.lang.String publicKey)
      Assigns the Client's public key.
      byte[]decrypt​(java.lang.String clientPublicKey, java.lang.String encryptedString)
      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 javax.crypto.spec.IvParameterSpecgetIvParameterSpec()
      Gets the IV parameter.
      java.lang.StringgetServerPublicKey()
      Gets the Server's public key.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • DHKey

        public DHKey()
        Constructs the instance creating the server's key only. The client "Alice" public key must be provided later.

    • Method Detail

      • getIvParameterSpec

        public static javax.crypto.spec.IvParameterSpec getIvParameterSpec()
        Gets the IV parameter.

      • assignClientPublicKey

        public void assignClientPublicKey​(java.lang.String publicKey)
        Assigns the Client's public key.
        Parameters:
        publicKey - The "Alice" public key as a hexadecimal number.
        Throws:
        java.lang.IllegalArgumentException - If the public key is invalid.

      • getServerPublicKey

        public java.lang.String getServerPublicKey()
        Gets the Server's public key.
        Returns:
        The server's public key as a hexadecimal number.

      • encrypt

        public void encrypt​(byte[] data,
                    SendTransaction sendTrans)
             throws java.lang.Exception
        Encrypts and appends the bytes to the SendTransaction.
        Parameters:
        data - The data to encrypt.
        sendTrans - The send transaction.
        Throws:
        java.lang.Exception - For errors.

      • decrypt

        public byte[] decrypt​(java.lang.String clientPublicKey,
                      java.lang.String encryptedString)
               throws java.security.InvalidKeyException,
                      java.security.InvalidAlgorithmParameterException,
                      java.security.NoSuchAlgorithmException,
                      javax.crypto.NoSuchPaddingException,
                      javax.crypto.IllegalBlockSizeException,
                      javax.crypto.BadPaddingException,
                      java.io.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:
        java.security.InvalidAlgorithmParameterException
        java.security.InvalidKeyException
        javax.crypto.NoSuchPaddingException
        java.security.NoSuchAlgorithmException
        javax.crypto.BadPaddingException
        javax.crypto.IllegalBlockSizeException
        java.io.UnsupportedEncodingException