com.bristle.javalib.security
Class Encrypter

java.lang.Object
  com.bristle.javalib.security.Encrypter

public class Encrypter
extends Object

This class contains support encrypting and decrypting data.

Usage:
   - The typical scenario for using this class is:
     - To encrypt a string:
               String strEncrypted = Encrypter.encrypt(strDecrypted);
     - To decrypt an encrypted string:
               String strDecrypted = Encrypter.decrypt(strEncrypted);

   - See the source code of the inner Tester class for more examples.
  
Assumptions:
Effects:
       - None.
Anticipated Changes:
Notes:
Implementation Notes:
Portability Issues:
Revision History:
   $Log$

Nested Class Summary

static class

Encrypter.Tester Each class contains a Tester inner class with a main() for easier unit testing.

Constructor Summary

Encrypter()

Method Summary

static String	decrypt(String strIn) Return the decrypted string value of the specified string.
static String	encrypt(String strIn) Return the encrypted string value of the specified string.

Methods inherited from class java.lang.Object

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

Constructor Detail

Encrypter

public Encrypter()

Method Detail

encrypt

public static String encrypt(String strIn)
                      throws UnsupportedEncodingException

Return the encrypted string value of the specified string. The specified string is assumed to use the ISO-8859-1 (Latin-1) encoding.

Parameters:

strIn - String to be encrypted.

Returns:

Encrypted string.

Throws:

UnsupportedEncodingException - When the incoming string does not use the ISO-8859-1 (Latin-1) encoding.

decrypt

public static String decrypt(String strIn)
                      throws UnsupportedEncodingException,
                             Base64.InvalidBase64DigitException,
                             Base64.TruncatedBase64EncodingException

Return the decrypted string value of the specified string. The specified string is assumed to use the ISO-8859-1 (Latin-1) encoding.

Parameters:

strIn - String to be decrypted.

Returns:

Decrypted string.

Throws:

UnsupportedEncodingException - When the incoming string does not use the ISO-8859-1 (Latin-1) encoding.

Base64.InvalidBase64DigitException - When the string to be decrypted contains a character that is not a valid Base64 digit char.

Base64.TruncatedBase64EncodingException - When the string to be decrypted has an invalid length.