Created autokey cipher

This commit is contained in:
2021-12-30 23:16:46 -05:00
parent d37b3fc35a
commit 4b3d9b3261
3 changed files with 630 additions and 1 deletions

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@@ -0,0 +1,106 @@
//CipherStreamJava/src/main/java/mattrixwv/CipherStreamJava/Autokey.java
//Matthew Ellison
// Created: 07-25-21
//Modified: 12-30--21
//This is the declaration of the Autokey class
package mattrixwv.CipherStreamJava;
public class Autokey extends Vigenere{
//Special rules for setting the strings for encoding
private void encodeSet(String key, String input) throws Exception{
//Set the input
setInputString(input);
StringBuilder newKey = new StringBuilder();
//Remove all unneccessary elements from the key
setKeyword(key);
newKey.append(keyword);
//Remove all unneccessary elements from the input
setKeyword(input);
newKey.append(getKeyword());
//Make sure the key is not any longer than the input
key = newKey.substring(0, getKeyword().length());
//Set the new keyword
setKeyword(key);
//Make sure to update the offset
offset.clear();
setOffset();
}
//Setting the strings for decoding
private void decodeSet(String key, String input) throws Exception{
//Remove all unneccessary elements from the key
setKeyword(key);
//Remove all unneccessary elements from the input
inputString = "";
setInputString(input);
}
//Decodes the inputString
protected String decode() throws Exception{
//Decode what the key will allow, add that to the key and continue
StringBuilder currentOutput = new StringBuilder();
StringBuilder fullOutput = new StringBuilder();
//Step through every character in the inputString and advance it the correct amount, according to offset
int offsetCnt = 0;
for(int letterCnt = 0;letterCnt < inputString.length();++letterCnt){
//If we have reached the end of the keyword add what we have to it and continue
if(offsetCnt == keyword.length()){
setKeyword(keyword + currentOutput.toString());
fullOutput.append(currentOutput);
currentOutput = new StringBuilder();
}
char letter = inputString.charAt(letterCnt);
if(Character.isUpperCase(letter)){
letter -= offset.get((offsetCnt++) % offset.size());
if(letter < 'A'){
letter += 26;
}
else if(letter > 'Z'){
letter -= 26;
}
}
else if(Character.isLowerCase(letter)){
letter -= offset.get((offsetCnt++) % offset.size());
if(letter < 'a'){
letter += 26;
}
else if(letter > 'z'){
letter -= 26;
}
}
currentOutput.append(letter);
}
//Empty the last character that were decoded
fullOutput.append(currentOutput);
//Save and return the results
outputString = fullOutput.toString();
return outputString;
}
//Constructor
public Autokey(){
super();
}
public Autokey(boolean leaveCapitals, boolean leaveWhitespace, boolean leaveSymbols){
super(leaveCapitals, leaveWhitespace, leaveSymbols);
}
//Encodes inputString using the Autokey cipher
public String encode(String key, String input) throws Exception{
reset();
encodeSet(key, input);
return encode();
}
//Decodes inputString using the Autokey cipher
public String decode(String key, String input) throws Exception{
reset();
setInputString(input);
decodeSet(key, input);
return decode();
}
}

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@@ -92,7 +92,7 @@ public class Vigenere{
return outputString;
}
//Decodes inputString and stores the result in outputString
protected String decode(){
protected String decode() throws Exception{
StringBuilder output = new StringBuilder();
//Step through every character in the inputString and advance it the correct amount, according to offset

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//CipherStreamJava/src/main/java/mattrixwv/CipherStreamJava/TestAutokey.java
//Matthew Ellison
// Created: 07-26-21
//Modified: 12-30-21
//These are the tests for the Vigenere class
package mattrixwv.CipherStreamJava;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class TestAutokey{
@Test
public void testDecode() throws Exception{
Autokey cipher = new Autokey(true, true, true);
//Test lowercase decoding
String input = "qnxepv";
String keyword = "queenly";
String correctOutput = "attack";
String output = cipher.decode(keyword, input);
assertEquals("Autokey failed lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "QNXEPV";
keyword = "queenly";
correctOutput = "ATTACK";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "qnxepv yt wtwp";
keyword = "queenly";
correctOutput = "attack at dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "qnxepv@yt-wtwp";
keyword = "queenly";
correctOutput = "attack@at-dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding
input = "Qnxepv yt - wtwp";
keyword = "QUEENLY";
correctOutput = "Attack at - dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Wmpm mx \"Xae Yhbryoca\"";
keyword = "k@i l-t";
correctOutput = "Meet at \"The Fountain\"";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoWhitespaceDecode() throws Exception{
Autokey cipher = new Autokey(true, false, true);
//Test lowercase decoding
String input = "qnxepv";
String keyword = "queenly";
String correctOutput = "attack";
String output = cipher.decode(keyword, input);
assertEquals("Autokey failed no whitespace lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "QNXEPV";
keyword = "queenly";
correctOutput = "ATTACK";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no whitespace uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "qnxepv yt wtwp";
keyword = "queenly";
correctOutput = "attackatdawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no whitespace whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "qnxepv@yt-wtwp";
keyword = "queenly";
correctOutput = "attack@at-dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no whitespace symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding
input = "Qnxepv yt - wtwp";
keyword = "QUEENLY";
correctOutput = "Attackat-dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no whitespace mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Wmpm mx \"Xae Yhbryoca\"";
keyword = "k@i l-t";
correctOutput = "Meetat\"TheFountain\"";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no whitespace mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoCapitalDecode() throws Exception{
Autokey cipher = new Autokey(false, true, true);
//Test lowercase decoding
String input = "qnxepv";
String keyword = "queenly";
String correctOutput = "attack";
String output = cipher.decode(keyword, input);
assertEquals("Autokey failed no capital lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "QNXEPV";
keyword = "queenly";
correctOutput = "attack";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no capital uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "qnxepv yt wtwp";
keyword = "queenly";
correctOutput = "attack at dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no capital whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "qnxepv@yt-wtwp";
keyword = "queenly";
correctOutput = "attack@at-dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no capital symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding
input = "Qnxepv yt - wtwp";
keyword = "QUEENLY";
correctOutput = "attack at - dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no capital mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Wmpm mx \"Xae Yhbryoca\"";
keyword = "k@i l-t";
correctOutput = "meet at \"the fountain\"";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no capital mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoSymbolDecode() throws Exception{
Autokey cipher = new Autokey(true, true, false);
//Test lowercase decoding
String input = "qnxepv";
String keyword = "queenly";
String correctOutput = "attack";
String output = cipher.decode(keyword, input);
assertEquals("Autokey failed no symbol lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "QNXEPV";
keyword = "queenly";
correctOutput = "ATTACK";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no symbol uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "qnxepv yt wtwp";
keyword = "queenly";
correctOutput = "attack at dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no symbol whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "qnxepv@yt-wtwp";
keyword = "queenly";
correctOutput = "attackatdawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no symbol symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding
input = "Qnxepv yt - wtwp";
keyword = "QUEENLY";
correctOutput = "Attack at dawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no symbol mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Wmpm mx \"Xae Yhbryoca\"";
keyword = "k@i l-t";
correctOutput = "Meet at The Fountain";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed no symbol mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoCapitalWhitespaceSymbolDecode() throws Exception{
Autokey cipher = new Autokey(false, false, false);
//Test lowercase decoding
String input = "qnxepv";
String keyword = "queenly";
String correctOutput = "attack";
String output = cipher.decode(keyword, input);
assertEquals("Autokey failed secure lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "QNXEPV";
keyword = "queenly";
correctOutput = "attack";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed secure uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "qnxepv yt wtwp";
keyword = "queenly";
correctOutput = "attackatdawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed secure whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "qnxepv@yt-wtwp";
keyword = "queenly";
correctOutput = "attackatdawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed secure symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding
input = "Qnxepv yt - wtwp";
keyword = "QUEENLY";
correctOutput = "attackatdawn";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed secure mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Wmpm mx \"Xae Yhbryoca\"";
keyword = "k@i l-t";
correctOutput = "meetatthefountain";
output = cipher.decode(keyword, input);
assertEquals("Autokey failed secure mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testEncode() throws Exception{
Autokey cipher = new Autokey(true, true, true);
//Test lowercase decoding
String input = "attack";
String keyword = "queenly";
String correctOutput = "qnxepv";
String output = cipher.encode(keyword, input);
assertEquals("Autokey failed lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "ATTACK";
keyword = "queenly";
correctOutput = "QNXEPV";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "attack at dawn";
keyword = "queenly";
correctOutput = "qnxepv yt wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "attack@at-dawn";
keyword = "queenly";
correctOutput = "qnxepv@yt-wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol encoding
input = "Attack at - dawn";
keyword = "QUEENLY";
correctOutput = "Qnxepv yt - wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Meet at \"The Fountain\"";
keyword = "k@i l-t";
correctOutput = "Wmpm mx \"Xae Yhbryoca\"";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoWhitespaceEncode() throws Exception{
Autokey cipher = new Autokey(true, false, true);
//Test lowercase decoding
String input = "attack";
String keyword = "queenly";
String correctOutput = "qnxepv";
String output = cipher.encode(keyword, input);
assertEquals("Autokey failed no whitespace lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "ATTACK";
keyword = "queenly";
correctOutput = "QNXEPV";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no whitespace uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "attack at dawn";
keyword = "queenly";
correctOutput = "qnxepvytwtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no whitespace whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "attack@at-dawn";
keyword = "queenly";
correctOutput = "qnxepv@yt-wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no whitespace symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol encoding
input = "Attack at - dawn";
keyword = "QUEENLY";
correctOutput = "Qnxepvyt-wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no whitespace mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Meet at \"The Fountain\"";
keyword = "k@i l-t";
correctOutput = "Wmpmmx\"XaeYhbryoca\"";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no whitespace mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoCapitalEncode() throws Exception{
Autokey cipher = new Autokey(false, true, true);
//Test lowercase decoding
String input = "attack";
String keyword = "queenly";
String correctOutput = "qnxepv";
String output = cipher.encode(keyword, input);
assertEquals("Autokey failed no capital lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "ATTACK";
keyword = "queenly";
correctOutput = "qnxepv";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no capital uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "attack at dawn";
keyword = "queenly";
correctOutput = "qnxepv yt wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no capital whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "attack@at-dawn";
keyword = "queenly";
correctOutput = "qnxepv@yt-wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no capital symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol encoding
input = "Attack at - dawn";
keyword = "QUEENLY";
correctOutput = "qnxepv yt - wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no capital mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Meet at \"The Fountain\"";
keyword = "k@i l-t";
correctOutput = "wmpm mx \"xae yhbryoca\"";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no capital mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoSymbolEncode() throws Exception{
Autokey cipher = new Autokey(true, true, false);
//Test lowercase decoding
String input = "attack";
String keyword = "queenly";
String correctOutput = "qnxepv";
String output = cipher.encode(keyword, input);
assertEquals("Autokey failed no symbol lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "ATTACK";
keyword = "queenly";
correctOutput = "QNXEPV";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no symbol uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "attack at dawn";
keyword = "queenly";
correctOutput = "qnxepv yt wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no symbol whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "attack@at-dawn";
keyword = "queenly";
correctOutput = "qnxepvytwtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no symbol symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol encoding
input = "Attack at - dawn";
keyword = "QUEENLY";
correctOutput = "Qnxepv yt wtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no symbol mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Meet at \"The Fountain\"";
keyword = "k@i l-t";
correctOutput = "Wmpm mx Xae Yhbryoca";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed no symbol mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testNoCapitalWhitespaceSymbolEncode() throws Exception{
Autokey cipher = new Autokey(false, false, false);
//Test lowercase decoding
String input = "attack";
String keyword = "queenly";
String correctOutput = "qnxepv";
String output = cipher.encode(keyword, input);
assertEquals("Autokey failed secure lowercase decoding.", correctOutput, output);
//Test uppercase decoding
input = "ATTACK";
keyword = "queenly";
correctOutput = "qnxepv";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed secure uppercase decoding.", correctOutput, output);
//Test whitespace decoding
input = "attack at dawn";
keyword = "queenly";
correctOutput = "qnxepvytwtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed secure whitespace decoding.", correctOutput, output);
//Test symbol decoding
input = "attack@at-dawn";
keyword = "queenly";
correctOutput = "qnxepvytwtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed secure symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol encoding
input = "Attack at - dawn";
keyword = "QUEENLY";
correctOutput = "qnxepvytwtwp";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed secure mixed case, whitespace, symbol decoding.", correctOutput, output);
//Test mixed case, whitespace, symbol decoding with mangled keyword
input = "Meet at \"The Fountain\"";
keyword = "k@i l-t";
correctOutput = "wmpmmxxaeyhbryoca";
output = cipher.encode(keyword, input);
assertEquals("Autokey failed secure mixed case, whitespace, symbol decoding with mangled keyword.", correctOutput, output);
}
@Test
public void testKeyword() throws Exception{
Autokey cipher = new Autokey();
//Test keyword with whitespace
String keyword = "x y z ";
String correctOutput = "XYZ";
cipher.setKeyword(keyword);
String output = cipher.getKeyword();
assertEquals("Vigenere failed keyword with whitespace", correctOutput, output);
//Test keyword with symbol
keyword = "x-y@z0";
correctOutput = "XYZ";
cipher.setKeyword(keyword);
output = cipher.getKeyword();
assertEquals("Vigenere failed keyword with symbol", correctOutput, output);
//Test keyword with mixed case
keyword = "xYz";
correctOutput = "XYZ";
cipher.setKeyword(keyword);
output = cipher.getKeyword();
assertEquals("Vigenere failed keyword with mixed case", correctOutput, output);
//Test keyword with whitespace, symbol and keyword
keyword = "x Y%z ";
correctOutput = "XYZ";
cipher.setKeyword(keyword);
output = cipher.getKeyword();
assertEquals("Vigenere failed keyword with space, symbol, and mixed case", correctOutput, output);
}
}