UPDATED: See jPPPv3.0.1

I have updated my earlier implementation for PPPv3. In addition, I modified the PPPEngine object to behave in an easier to manage way. Here is my new java doc, along with an example driver.

Download

 1: Scanner in = new Scanner(System.in);
 2: System.out.print("Password: ");
 3: String password = in.next();
 4: String sequencekey = PPPengine.findSequenceKey(password);
 5: PPPengine card1 = new PPPengine(sequencekey);
 6: System.out.println("Code 1: "+card1.makePasscode ());
 7: card1.advanceToNextPasscode();
 8: System.out.println("Code 2: "+card1.makePasscode ());

Class PPPengine

java.lang.Object PPPengine
public class PPPengine

extends java.lang.Object




Main class for PPP password calculations. 












Constructor Summary




PPPengine(java.lang.String sequenceKeyIn) 


          Initiates the PPP card object.





PPPengine(java.lang.String sequenceKeyIn, int cardNumberIn, int columnIn, int rowIn) 


           







   






Method Summary




 void
advanceToNextPasscode() 


          Advances the current object to the next passcode.





static java.lang.String
findSequenceKey(java.lang.String passphrase) 


          Creates 64-bit sequence key from passphrase using SHA-256.





 java.lang.String
makePasscode() 


          Generates the passcode for the current object’s state.





static void
setAlphabet(java.lang.String alphabetIn) 


          Sets the character set used by the engine.





static void
setLength(int lengthIn) 


          Sets the passcode length used by the system.







   






Methods inherited from class java.lang.Object




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






   








Constructor Detail






  


PPPengine


public PPPengine(java.lang.String sequenceKeyIn)




Initiates the PPP card object. Use this to create a virtual replacement for a set printed PPP cards. 




Parameters:


sequenceKeyIn – 64 Character key used to generate card










PPPengine


public PPPengine(java.lang.String sequenceKeyIn, int cardNumberIn, int columnIn, int rowIn)






Parameters:


sequenceKeyIn – 64 Character key used to generate card


cardNumberIn – Starting PPP card


columnIn – Starting column


rowIn – Starting row












Method Detail








findSequenceKey


 public static java.lang.String findSequenceKey(java.lang.String passphrase)




Creates 64-bit sequence key from passphrase using SHA-256. 








Parameters:


passphrase – String passphrase to be converted 


Returns:


String 64-bit sequence key










setAlphabet


public static void setAlphabet(java.lang.String alphabetIn)




Sets the character set used by the engine. 








Parameters:


alphabetIn – String of characters










setLength


public static void setLength(int lengthIn)




Sets the passcode length used by the system. 








Parameters:


lengthIn – Number of characters in final passcode










advanceToNextPasscode


public void advanceToNextPasscode()




Advances the current object to the next passcode. 














makePasscode


public java.lang.String makePasscode()




Generates the passcode for the current object’s state. 








Returns:


String of length characters that is the passcode. 


Throws: 


java.lang.IllegalArgumentException