com.metamatrix.common.util.crypto.cipher
Class BasicCryptor

java.lang.Object
  com.metamatrix.common.util.crypto.cipher.BasicCryptor

All Implemented Interfaces:

Cryptor, Decryptor, Encryptor

Direct Known Subclasses:

SymmetricCryptor

public class BasicCryptor
extends java.lang.Object
implements Cryptor

Implementation of Cryptor interface that can perform both encryption and decryption. Instances of this class can be cast to any of the following interfaces: Cryptor, Encryptor, or Decryptor.

Public methods in this class throw only CryptoExceptions.

See Also:

Encryptor, Decryptor

Field Summary

protected java.lang.String	cipherAlgorithm
protected java.security.Key	decryptKey The key to be used for decryption.
protected javax.crypto.Cipher	encryptCipher The Cipher to use for encryption.

Constructor Summary

BasicCryptor(java.security.Key encryptKey, java.security.Key decryptKey, java.lang.String algorithm)

Method Summary

byte[]	decrypt(byte[] ciphertext) Decrypt the ciphertext to yield the original cleartext.
java.lang.String	decrypt(java.lang.String ciphertext) Decrypt the ciphertext to yield the original cleartext.
byte[]	encrypt(byte[] cleartext) Encrypt the cleartext in byte array format.
java.lang.String	encrypt(java.lang.String cleartext) Encrypt the cleartext
protected void	initDecryptCipher() Initialize the ciphers used for encryption and decryption.
protected void	initEncryptCipher() Initialize the cipher used for encryption.
java.io.Serializable	sealObject(java.io.Serializable object)
static java.lang.String	stripEncryptionPrefix(java.lang.String ciphertext)
java.io.Serializable	unsealObject(java.io.Serializable object)

Methods inherited from class java.lang.Object

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

Field Detail

decryptKey

protected java.security.Key decryptKey

The key to be used for decryption.

encryptCipher

protected javax.crypto.Cipher encryptCipher

The Cipher to use for encryption.

cipherAlgorithm

protected java.lang.String cipherAlgorithm

Constructor Detail

BasicCryptor

public BasicCryptor(java.security.Key encryptKey,
                    java.security.Key decryptKey,
                    java.lang.String algorithm)
             throws CryptoException

Throws:

CryptoException

Method Detail

decrypt

public byte[] decrypt(byte[] ciphertext)
               throws CryptoException

Decrypt the ciphertext to yield the original cleartext.

Specified by:

decrypt in interface Decryptor

Parameters:

ciphertext - The text to be encrypted, in byte form

The - decrypted cleartext, in byte form

Throws:

CryptoException

decrypt

public java.lang.String decrypt(java.lang.String ciphertext)
                         throws CryptoException

Description copied from interface: Decryptor

Decrypt the ciphertext to yield the original cleartext.

Specified by:

decrypt in interface Decryptor

Parameters:

ciphertext - The text to be encrypted

Throws:

CryptoException

stripEncryptionPrefix

public static java.lang.String stripEncryptionPrefix(java.lang.String ciphertext)

initDecryptCipher

protected void initDecryptCipher()
                          throws CryptoException

Initialize the ciphers used for encryption and decryption. The ciphers define the algorithms to be used. They are initialized with the appropriate key to be used in the encryption or decryption operation.

Throws:

CryptoException

unsealObject

public java.io.Serializable unsealObject(java.io.Serializable object)
                                  throws CryptoException

Specified by:

unsealObject in interface Decryptor

Throws:

CryptoException

encrypt

public byte[] encrypt(byte[] cleartext)
               throws CryptoException

Encrypt the cleartext in byte array format.

Specified by:

encrypt in interface Encryptor

Parameters:

cleartext - The text to be encrypted, in byte form

The - encrypted ciphertext, in byte form

Throws:

CryptoException

encrypt

public java.lang.String encrypt(java.lang.String cleartext)
                         throws CryptoException

Description copied from interface: Encryptor

Encrypt the cleartext

Specified by:

encrypt in interface Encryptor

Parameters:

cleartext - The text to be encrypted

Throws:

CryptoException

initEncryptCipher

protected void initEncryptCipher()
                          throws CryptoException

Initialize the cipher used for encryption. The cipher defines the algorithm to be used. It is initialized with the appropriate key to be used in the encryption operation.

Throws:

CryptoException

sealObject

public java.io.Serializable sealObject(java.io.Serializable object)
                                throws CryptoException

Specified by:

sealObject in interface Encryptor

Throws:

CryptoException