CipherStream/CipherStreamJava
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Started using stringbuilder for efficiency

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Mattrixwv
2021-07-26 00:30:37 -04:00
parent 300a3acd06
commit 5963acc92e
3 changed files with 42 additions and 32 deletions
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8
src/main/java/mattrixwv/CipherStreamJava/Atbash.java
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@@ -12,20 +12,24 @@ public class Atbash{
private String outputString; //Holds teh current version of the library private String outputString; //Holds teh current version of the library
//Decodes inputString and stores in outputString //Decodes inputString and stores in outputString
private String decode(){ private String decode(){
StringBuilder output = new StringBuilder();
//Stop through every element in the inputString and shift it the correct amount //Stop through every element in the inputString and shift it the correct amount
for(int cnt = 0;cnt < inputString.length();++cnt){ for(int cnt = 0;cnt < inputString.length();++cnt){
outputString += (char)(inputString.charAt(cnt) + 25 - (2 * (inputString.charAt(cnt) - 'A'))); output.append((char)(inputString.charAt(cnt) + 25 - (2 * (inputString.charAt(cnt) - 'A'))));
} }
outputString = output.toString();
return outputString; return outputString;
} }
//Encodes inputString and stores in outputString //Encodes inputString and stores in outputString
private String encode(){ private String encode(){
StringBuilder output = new StringBuilder();
//Step through every element in the inputString and shift it the correct amount //Step through every element in the inputString and shift it the correct amount
for(int cnt = 0;cnt < inputString.length();++cnt){ for(int cnt = 0;cnt < inputString.length();++cnt){
outputString += (char)(inputString.charAt(cnt) + 25 - (2 * (inputString.charAt(cnt) - 'A'))); output.append((char)(inputString.charAt(cnt) + 25 - (2 * (inputString.charAt(cnt) - 'A'))));
} }
outputString = output.toString();
return outputString; return outputString;
} }
//Removes all invalid characters and sets inputString //Removes all invalid characters and sets inputString

62
src/main/java/mattrixwv/CipherStreamJava/Caesar.java
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@@ -22,64 +22,70 @@ public class Caesar{
} }
//Encodes the inputString and stores the result in outputString //Encodes the inputString and stores the result in outputString
private String encode(){ private String encode(){
StringBuilder output = new StringBuilder();
for(int cnt = 0;cnt < inputString.length();++cnt){ for(int cnt = 0;cnt < inputString.length();++cnt){
char temp = inputString.charAt(cnt); //A temperary holder for the current working character char currentChar = inputString.charAt(cnt); //A temperary holder for the current working character
//If it is an upper case letter shift it and wrap if necessary //If it is an upper case letter shift it and wrap if necessary
if(Character.isUpperCase(temp)){ if(Character.isUpperCase(currentChar)){
temp += shift; currentChar += shift;
//Wrap around if the letter is now out of bounds //Wrap around if the letter is now out of bounds
if(temp < 'A'){ if(currentChar < 'A'){
temp += 26; currentChar += 26;
} }
else if(temp > 'Z'){ else if(currentChar > 'Z'){
temp -= 26; currentChar -= 26;
} }
} }
//If it is a lower case letter shift it and wrap if necessary //If it is a lower case letter shift it and wrap if necessary
else if(Character.isLowerCase(temp)){ else if(Character.isLowerCase(currentChar)){
temp += shift; currentChar += shift;
//Wrap around if the letter is now out of bounds //Wrap around if the letter is now out of bounds
if(temp < 'a'){ if(currentChar < 'a'){
temp += 26; currentChar += 26;
} }
else if(temp > 'z'){ else if(currentChar > 'z'){
temp -= 26; currentChar -= 26;
} }
} }
//If it is whitespace, number, or punctuation just let it pass through //If it is whitespace, number, or punctuation just let it pass through
//Add it to the output string //Add it to the output string
outputString += temp; output.append(currentChar);
} }
outputString = output.toString();
return outputString; return outputString;
} }
//Decodes the inputString and stores the result in outputString //Decodes the inputString and stores the result in outputString
private String decode(){ private String decode(){
StringBuilder output = new StringBuilder();
for(int cnt = 0;cnt < inputString.length();++cnt){ for(int cnt = 0;cnt < inputString.length();++cnt){
char temp = inputString.charAt(cnt); //A temperary holder for the current working character char currentChar = inputString.charAt(cnt); //A temperary holder for the current working character
//If it is an upper case letter shift it and wrap if necessary //If it is an upper case letter shift it and wrap if necessary
if(Character.isUpperCase(temp)){ if(Character.isUpperCase(currentChar)){
temp -= shift; currentChar -= shift;
if(temp < 'A'){ if(currentChar < 'A'){
temp += 26; currentChar += 26;
} }
else if(temp > 'Z'){ else if(currentChar > 'Z'){
temp -= 26; currentChar -= 26;
} }
} }
//If it is a lower case letter shift it and wrap if necessary //If it is a lower case letter shift it and wrap if necessary
else if(Character.isLowerCase(temp)){ else if(Character.isLowerCase(currentChar)){
temp -= shift; currentChar -= shift;
if(temp < 'a'){ if(currentChar < 'a'){
temp += 26; currentChar += 26;
} }
else if(temp > 'z'){ else if(currentChar > 'z'){
temp -= 26; currentChar -= 26;
} }
} }
//If it is whitespace, number, or punctuation just let it pass through //If it is whitespace, number, or punctuation just let it pass through
//Add it to the output string //Add it to the output string
outputString += temp; output.append(currentChar);
} }
outputString = output.toString();
return outputString; return outputString;
} }

4
src/test/java/mattrixwv/CipherStreamJava/TestAtbash.java
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@@ -13,7 +13,7 @@ import org.junit.Test;
public class TestAtbash{ public class TestAtbash{
@Test @Test
public void TestDecode(){ public void testDecode(){
Atbash cipher = new Atbash(); Atbash cipher = new Atbash();
//Test 1 //Test 1
@@ -29,7 +29,7 @@ public class TestAtbash{
assertEquals("Atbash Decoding failed the second test", correctOutput, output); assertEquals("Atbash Decoding failed the second test", correctOutput, output);
} }
@Test @Test
public void TestEncode(){ public void testEncode(){
Atbash cipher = new Atbash(); Atbash cipher = new Atbash();
//Test 1 //Test 1