de.alpharogroup.crypto.key

Class PrivateKeyDecryptor

java.lang.Object

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

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

de.alpharogroup.crypto.key.PrivateKeyDecryptor

All Implemented Interfaces:

de.alpharogroup.crypto.api.ByteArrayDecryptor, de.alpharogroup.crypto.api.Cryptor, de.alpharogroup.crypto.api.Decryptor<byte[],byte[]>, Serializable

public class PrivateKeyDecryptor
extends AbstractDecryptor<Cipher,PrivateKey>
implements de.alpharogroup.crypto.api.ByteArrayDecryptor

The class PrivateKeyDecryptor decrypts encrypted byte array the was encrypted with the public key of the pendant private key of this class.

See Also:

Serialized Form

Field Summary

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

model

Constructor Summary

Constructors

Constructor and Description
PrivateKeyDecryptor(de.alpharogroup.crypto.model.CryptModel<Cipher,PrivateKey> model) Instantiates a new PrivateKeyDecryptor with the given CryptModel.

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(byte[] encrypted)
protected String	newAlgorithm() Factory method for creating a new algorithm that will be used with the cipher object.
protected Cipher	newCipher(PrivateKey key, 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.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

PrivateKeyDecryptor

public PrivateKeyDecryptor(de.alpharogroup.crypto.model.CryptModel<Cipher,PrivateKey> model)
                    throws InvalidKeyException,
                           NoSuchAlgorithmException,
                           InvalidKeySpecException,
                           NoSuchPaddingException,
                           InvalidAlgorithmParameterException,
                           UnsupportedEncodingException

Instantiates a new PrivateKeyDecryptor with the given CryptModel.

Parameters:

model - The crypt model.

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.

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

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

Method Detail

decrypt

public byte[] decrypt(byte[] encrypted)
               throws Exception

Specified by:

decrypt in interface de.alpharogroup.crypto.api.Decryptor<byte[],byte[]>

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,PrivateKey>

Returns:

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

newCipher

protected Cipher newCipher(PrivateKey key,
                           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.

Specified by:

newCipher in class AbstractCryptor<Cipher,PrivateKey>

Parameters:

key - the 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.