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‎TeaProgram/TeaProgram.iml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎TeaProgram/out/production/TeaProgram/com/Brian/TeaProgram/TEA.class‎

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‎TeaProgram/src/com/Brian/TeaProgram/TEA.java‎

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package com.Brian.TeaProgram;
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//----------------------------------------------------------------------------------------------------------------------
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// *********************************** FOR LICENSING PLEASE VIEW LICENSING FILE ***********************************
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//----------------------------------------------------------------------------------------------------------------------
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// *Algorithm designed and written by: Roger Needham, and David Wheeler (1994-1998)*
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//----------------------------------------------------------------------------------------------------------------------
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// +====================================+
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// | Code By: Brian Carey |
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// | Tiny Encryption (TEA) Program |
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// | Updated: 2.19.2020 |
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// | v. 1.0.4 |
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// | https://github.com/Bri-dot-dev |
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// +====================================+
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//----------------------------------------------------------------------------------------------------------------------
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// ******************** PLEASE VIEW README FOR INSTRUCTIONS ON HOW TO USE THIS PROGRAM PROPERLY ********************
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//----------------------------------------------------------------------------------------------------------------------
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class TEA {
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// Variables
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static int sum = 0x0;
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static int delta = 0x9e3779b9; //Constant Variable Delta
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static int lText = 0x01ca4567; //<----- ENTER LEFT HEX HERE (Left Text Block In Hex)
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static int rText = 0x0cabcdef; //<------ENTER RIGHT HEX HERE (Right Text Block In Hex)
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static int key[] = {0xaf6babcd, 0xef00f000, 0xfeafffaf, 0xabcdef01}; //<-- ENTER KEY HERE (128-Bit Key)
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public static void log(String msg) {
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System.out.println(msg);
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}
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public static void main(String[] args) {
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log("+==============================================+");
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log("|======| Tiny Encryption (TEA) Program |=======|");
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log("|===============| Brian Carey |================|");
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log("|==================| v1.0.4 |==================|");
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log("+==============================================+");
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// Printing Plain Text
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log(String.format("| Plain Text is: "+"0x%08x", lText) + "" + String.format("%08x |", rText));
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log( "|----------------------------------------------|");
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// Calling Encryption
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int[] encText = encrypt(lText, rText);
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// Calling Decryption
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String decText = decrypt(encText[0], encText[1]);
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//Parsing Left Block
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lText = Integer.parseInt(decText.substring(String.valueOf(lText).length()),16);
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//Parsing Right Block
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rText = Integer.parseInt(decText.substring(String.valueOf(rText).length()),16);
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// Printing Key Used
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log(String.format("| Key Used: 0x%08x%08x%08x%08x |", key[0], key[1], key[2], key[3]));
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log("+==============================================+");
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}
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//Encryption Method
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public static int[] encrypt (int l, int r) {
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// Handling Errors With Key Input
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if( key == null)
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{
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log("Key is not defined!");
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System.exit(0);
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}
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sum = 0;
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//TEA Algorithm for Encrypting
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for(int i =0; i <32; i++) {
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sum += delta;
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l += (r << 4 & 0xfffffff0 ) + key[0] ^ r + sum ^ (r >>> 5 & 0x7ffffff) + key[1];
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r += (l << 4 & 0xfffffff0 ) + key[2] ^ l + sum ^ (l >>> 5 & 0x7ffffff) + key[3];
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}
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// Printing out Encrypted Cipher Text
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log(String.format("| Cipher Text is: "+"0x%08x", l) + "" + String.format("%08x |", r));
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log("|----------------------------------------------|");
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// Returning "encText" or Encrypted Text
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int[] encText = {l,r};
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return encText;
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}
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//------------------------------------------------------------------------------------------------------------------
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//Decryption Method
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public static String decrypt (int l, int r) {
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// Handling Errors With Key Input
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if( key == null)
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{
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log("Key is not defined!");
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System.exit(0);
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}
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// TEA Algorithm for Decrypting
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sum = delta << 5;
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for ( int i=0; i<32; i++) {
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r -= (l << 4 & 0xfffffff0) + key[2] ^ l + sum ^ (l >>> 5 & 0x7ffffff) + key[3];
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l -= (r << 4 & 0xfffffff0) + key[0] ^ r + sum ^ (r >>> 5 & 0x7ffffff) + key[1];
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sum -= delta;
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}
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//--------------------------------------------------------------------------------------------------------------
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// Printing out Decrypted Text
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log(String.format("| Decrypted Text is: "+"0x%08x", l) + "" + String.format("%08x |", r));
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log("|----------------------------------------------|");
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// Returning "decText" or Decrypted Text
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String decText = Integer.toString(l,16) + Integer.toString(r,16);
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return decText;
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}
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}

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