com.jalios.util

Class StringEncrypter

java.lang.Object

com.jalios.util.StringEncrypter

public class StringEncrypter
extends java.lang.Object

Encrypts and decrypts string using Java Cryptography Extension (JCE)

Version:

$Revision: 33675 $

Author:

Javid Jamae - http://www.devx.com/Java/10MinuteSolution/21385

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StringEncrypter.EncryptionException Exception Wrapper for any error that might occur during the encryption or decryption process.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DES_ENCRYPTION_SCHEME DES encryption scheme.
static java.lang.String	DESEDE_ENCRYPTION_SCHEME DES3 (DESede) encryption scheme.
static java.lang.String	REVISION

Constructor Summary

Constructors

Constructor and Description
StringEncrypter(java.lang.String encryptionScheme, java.lang.String encryptionKey) Create a new StringEncrypter using the specified encryption scheme and key.

Method Summary

Modifier and Type	Method and Description
java.lang.String	decrypt(java.lang.String encryptedString) Decrypt the specified string using this StringEncrypter.
java.lang.String	encrypt(java.lang.String unencryptedString) Encrypt the specified string using this StringEncrypter.

Methods inherited from class java.lang.Object

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

Field Detail

REVISION

public static final java.lang.String REVISION

See Also:

Constant Field Values

DESEDE_ENCRYPTION_SCHEME

public static final java.lang.String DESEDE_ENCRYPTION_SCHEME

DES3 (DESede) encryption scheme.

See Also:

Constant Field Values

DES_ENCRYPTION_SCHEME

public static final java.lang.String DES_ENCRYPTION_SCHEME

DES encryption scheme.

See Also:

Constant Field Values

Constructor Detail

StringEncrypter

public StringEncrypter(java.lang.String encryptionScheme,
                       java.lang.String encryptionKey)
                throws StringEncrypter.EncryptionException

Create a new StringEncrypter using the specified encryption scheme and key.

Parameters:

encryptionScheme - an encryption scheme from one of the following : DESEDE_ENCRYPTION_SCHEME or DES_ENCRYPTION_SCHEME

encryptionKey - the key to use for the encrypter, must be a valid string of 24 or more characters, must not be null.

Throws:

java.lang.IllegalArgumentException - if encryptionKey is null or less than 24 characters

StringEncrypter.EncryptionException

Method Detail

encrypt

public java.lang.String encrypt(java.lang.String unencryptedString)
                         throws StringEncrypter.EncryptionException

Encrypt the specified string using this StringEncrypter.

Parameters:

unencryptedString - the string to encrypt, must not be null or empty.

Returns:

the encrypted string.

Throws:

java.lang.IllegalArgumentException - if unencryptedString is null or empty

StringEncrypter.EncryptionException

decrypt

public java.lang.String decrypt(java.lang.String encryptedString)
                         throws StringEncrypter.EncryptionException

Decrypt the specified string using this StringEncrypter.

Parameters:

encryptedString - the string to decrypt, must not be null or empty.

Returns:

the decrypted string.

Throws:

java.lang.IllegalArgumentException - if encryptedString is null or empty

StringEncrypter.EncryptionException