Delete Old-HOP-Encode.java
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PeacefulPotato
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//Version History:
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//1.0: Made program
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//2.0: Added more comments, another step, shortened the ciphertext, modified the colemak dictionary, standardized the comments so they all are at the top, and changed the verison number
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//for base64
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import java.util.Base64;
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import java.util.UUID;
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import java.io.UnsupportedEncodingException;
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//for input
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import java.util.Scanner;
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//for converting from text to base 35
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import java.math.BigInteger;
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import java.lang.Integer;
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/**
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* @author PeacefulPotato
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* @version 2.0
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*/
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class Encode {
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/**
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* @param plaintext
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* @return ciphertext
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* @since 1.0
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*/
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public static void main(String[] args) {
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//input plaintext
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Scanner input = new Scanner(System.in);
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System.out.print("Enter message to encode: ");
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String plaintext = input.nextLine();
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input.close();
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//call encoding subprograms and print ciphertext
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System.out.println("Your encoded message: "+stepfour(stepthree(steptwo(stepone(plaintext))))+"==");
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}
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/**
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* @param input
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* @return base64encodedString
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* @throws UnsupportedEncodingException
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* @since 1.0
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*/
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public static String stepone(String input) {
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//encode to base64
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try {
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String base64encodedString = Base64.getEncoder().encodeToString(
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input.getBytes("utf-8"));
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return base64encodedString;
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//necessary to prevent code from breaking
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} catch(UnsupportedEncodingException e) {
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String error = ("Error :" + e.getMessage());
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return error;
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}
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}
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/**
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* @param stepone (qwerty)
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* @return steptwo (modified colemak)
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* @since 1.0
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*/
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public static String steptwo(String stepone) {
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String steptwo="";
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//dictionaries for qwerty and colemak
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char[] qwerty = {'1','2','3','4','5','6','7','8','9','0','=','q','w','e','r','t','y','u','i','o','p','a','s','d','f','g','h','j','k','l','z','x','c','v','b','n','m','Q','W','E','R','T','Y','U','I','O','P','A','S','D','F','G','H','J','K','L','Z','X','C','V','B','N','M'};
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//I swapped ; and o in the colemak layout to make it more realistic
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//I swapped a bunch of letters and numbers to make sure all numbers and letters are modified
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char[] colemak = {'8','4','7','1','9','0','6','5','2','3','=','h','a','f','p','g','j','l','u','y','o','w','r','s','t','d','q','n','e','i','v','c','z','k','b','x','m','H','A','F','P','G','J','L','U','Y','O','W','R','S','T','D','Q','N','E','I','V','C','Z','K','B','X','M'};
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//convert the string to an array and change each character to its "colemak" counterpart.
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char[] encode = stepone.toCharArray();
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for (int x=0; x<encode.length; x++) {
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for (int y=0; y<qwerty.length; y++) {
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if(qwerty[y]==encode[x]) {
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encode[x]=colemak[y];
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break;
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}
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}
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}
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//convert back to string and return
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for (int x=0; x<encode.length; x++) {
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steptwo=steptwo+encode[x];
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}
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return steptwo;
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}
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/**
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* @param steptwo (text)
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* @return stepthree (base 35 with delimeter z)
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* @since 1.0
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*/
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public static String stepthree(String steptwo) {
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String str = steptwo;
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//convert string to char array and create new String array
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char[] magicasciipowers = str.toCharArray();
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String[] numbersgohere = new String
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[magicasciipowers.length];
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//convert each character to its corresponding ascii value
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for(int i=0; i<magicasciipowers.length; i++) {
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int temp=magicasciipowers[i];
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temp = (int)temp;
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if (temp<100) {
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numbersgohere[i]="0"+Integer.toString(temp);
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}
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else {
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numbersgohere[i]=Integer.toString(temp);
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}
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}
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//convert numbers into string
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String numbers = "";
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for (int i=0; i<numbersgohere.length; i++) {
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numbers=numbers+numbersgohere[i];
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}
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//convert to base 35
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BigInteger mInt = new BigInteger(numbers);
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String baseninevalue = mInt.toString(35);
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//move to another array so that string can be generated with delimeter
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char[] timefordelimeter = baseninevalue.toCharArray();
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//insert the letter z every two letters
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String stepthree = "";
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for (int i=0; i<=timefordelimeter.length-2; i=i+2) {
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stepthree=stepthree+timefordelimeter[i]+timefordelimeter[i+1]+"z";
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}
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//this takes care of any stragglers caused by deletion of a zero and/or base conversion
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int l = timefordelimeter.length;
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int j = (l-(l%2));
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for (int i=j; i<timefordelimeter.length; i++) {
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stepthree=stepthree+timefordelimeter[i];
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}
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return stepthree;
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}
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/**
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* @param stepthree (forwards)
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* @return stepfour (backwards)
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* @since 2.0
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*/
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public static String stepfour(String stepthree) {
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String stepfour = "";
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//reverse the string and return
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char[] forwards = stepthree.toCharArray();
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char[] backwards = new char[forwards.length];
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for(int i=0;i<forwards.length;i++) {
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backwards[(forwards.length-1)-i]=forwards[i];
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}
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for (int i=0; i<backwards.length; i++) {
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stepfour=stepfour+backwards[i];
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}
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return stepfour;
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}
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}
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//input code from https://www.geeksforgeeks.org/scanner-class-in-java/#:~:text=Scanner%20is%20a%20class%20in,and%20strings.&text=next()%20function%20returns%20the,first%20character%20in%20that%20string.
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//base64 code from https://www.tutorialspoint.com/java8/java8_base64.htm
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