de.alpharogroup.crypto.hex

Class HexableDecryptor

java.lang.Object

de.alpharogroup.crypto.core.AbstractCryptor<C,K>

de.alpharogroup.crypto.core.AbstractDecryptor<Cipher,String>

de.alpharogroup.crypto.core.AbstractStringDecryptor

de.alpharogroup.crypto.hex.HexableDecryptor

All Implemented Interfaces:

de.alpharogroup.crypto.api.Cryptor, de.alpharogroup.crypto.api.Decryptor<String,String>, de.alpharogroup.crypto.api.StringDecryptor, Serializable

public class HexableDecryptor
extends AbstractStringDecryptor

The class HexableDecryptor is the pendant class of HexableEncryptor and decrypts given String objects that was encrypted with HexableEncryptor. For an example see the unit test.

See Also:

Serialized Form

Field Summary

Fields inherited from class de.alpharogroup.crypto.core.AbstractCryptor

model

Constructor Summary

Constructors

Constructor and Description
HexableDecryptor(String privateKey) Instantiates a new HexableDecryptor from the given parameters.
HexableDecryptor(String privateKey, de.alpharogroup.crypto.algorithm.Algorithm algorithm) Instantiates a new HexableDecryptor from the given parameters.

Method Summary

Modifier and Type	Method and Description
String	decrypt(String encypted)
protected String	newAlgorithm() Factory method for creating a new algorithm that will be used with the cipher object.
protected Cipher	newCipher(String privateKey, String algorithm, byte[] salt, int iterationCount, int operationMode) Factory method for creating a new Cipher from the given parameters.

Methods inherited from class de.alpharogroup.crypto.core.AbstractStringDecryptor

newCipher, newKeySpec

Methods inherited from class de.alpharogroup.crypto.core.AbstractDecryptor

newOperationMode

Methods inherited from class de.alpharogroup.crypto.core.AbstractCryptor

newAlgorithmParameterSpec, newCipher, newIterationCount, newSalt, newSecretKeyFactory, onInitialize

Methods inherited from class java.lang.Object

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

Constructor Detail

HexableDecryptor

public HexableDecryptor(String privateKey)
                 throws InvalidKeyException,
                        NoSuchAlgorithmException,
                        InvalidKeySpecException,
                        NoSuchPaddingException,
                        InvalidAlgorithmParameterException,
                        UnsupportedEncodingException

Instantiates a new HexableDecryptor from the given parameters.

Parameters:

privateKey - The private key.

Throws:

InvalidAlgorithmParameterException - is thrown if initialization of the cypher object fails.

NoSuchPaddingException - is thrown if instantiation of the SecretKeyFactory object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchAlgorithmException - is thrown if instantiation of the SecretKeyFactory object fails.

InvalidKeyException - is thrown if initialization of the cypher object fails.

UnsupportedEncodingException - is thrown if the named charset is not supported.

HexableDecryptor

public HexableDecryptor(String privateKey,
                        de.alpharogroup.crypto.algorithm.Algorithm algorithm)
                 throws InvalidKeyException,
                        NoSuchAlgorithmException,
                        InvalidKeySpecException,
                        NoSuchPaddingException,
                        InvalidAlgorithmParameterException,
                        UnsupportedEncodingException

Instantiates a new HexableDecryptor from the given parameters.

Parameters:

privateKey - The private key.

algorithm - the algorithm

Throws:

InvalidAlgorithmParameterException - is thrown if initialization of the cypher object fails.

NoSuchPaddingException - is thrown if instantiation of the SecretKeyFactory object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchAlgorithmException - is thrown if instantiation of the SecretKeyFactory object fails.

InvalidKeyException - is thrown if initialization of the cypher object fails.

UnsupportedEncodingException - is thrown if the named charset is not supported.

Method Detail

decrypt

public String decrypt(String encypted)
               throws Exception

Throws:

Exception

newAlgorithm

protected String newAlgorithm()

Factory method for creating a new algorithm that will be used with the cipher object. Overwrite this method to provide a specific algorithm.

Overrides:

newAlgorithm in class AbstractCryptor<Cipher,String>

Returns:

the new algorithm that will be used with the cipher object.

newCipher

protected Cipher newCipher(String privateKey,
                           String algorithm,
                           byte[] salt,
                           int iterationCount,
                           int operationMode)
                    throws NoSuchAlgorithmException,
                           InvalidKeySpecException,
                           NoSuchPaddingException,
                           InvalidKeyException,
                           InvalidAlgorithmParameterException,
                           UnsupportedEncodingException

Factory method for creating a new Cipher from the given parameters. This method is invoked in the constructor from the derived classes and can be overridden so users can provide their own version of a new Cipher from the given parameters.

Overrides:

newCipher in class AbstractStringDecryptor

Parameters:

privateKey - the private key

algorithm - the algorithm

salt - the salt.

iterationCount - the iteration count

operationMode - the operation mode for the new cipher object

Returns:

the cipher

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the SecretKeyFactory object fails.

InvalidKeySpecException - is thrown if generation of the SecretKey object fails.

NoSuchPaddingException - is thrown if instantiation of the cypher object fails.

InvalidKeyException - is thrown if initialization of the cypher object fails.

InvalidAlgorithmParameterException - is thrown if initialization of the cypher object fails.

UnsupportedEncodingException - is thrown if the named charset is not supported.