de.alpharogroup.crypto.core

Class AbstractFileEncryptor

java.lang.Object

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

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

de.alpharogroup.crypto.core.AbstractFileEncryptor

All Implemented Interfaces:

de.alpharogroup.crypto.api.Cryptor, de.alpharogroup.crypto.api.Encryptor<File,File>, de.alpharogroup.crypto.api.FileEncryptor, Serializable

Direct Known Subclasses:

FileEncryptor

public abstract class AbstractFileEncryptor
extends AbstractEncryptor<Cipher,String>
implements de.alpharogroup.crypto.api.FileEncryptor

The abstract class AbstractFileEncryptor provides a base implementation for encrypting File objects.

Version:

1.0

Author:

Asterios Raptis

See Also:

Serialized Form

Field Summary

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

model

Constructor Summary

Constructors

Constructor and Description
AbstractFileEncryptor(de.alpharogroup.crypto.model.CryptModel<Cipher,String> model) Constructor with the given CryptModel.
AbstractFileEncryptor(String privateKey) Constructor with a private key.

Method Summary

Modifier and Type	Method and Description
protected Cipher	newCipher(int operationMode, SecretKey key, AlgorithmParameterSpec paramSpec, String alg) Factory method for creating a new Cipher from the given parameters.
protected Cipher	newCipher(String privateKey, String algorithm, byte[] salt, int iterationCount, int operationMode) Factory method for creating a new Cipher from the given parameters.
protected KeySpec	newKeySpec(String privateKey, byte[] salt, int iterationCount) Factory method for creating a new KeySpec from the given private key.

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

newOperationMode

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

newAlgorithm, newAlgorithmParameterSpec, newCipher, newIterationCount, newSalt, newSecretKeyFactory, onInitialize

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.alpharogroup.crypto.api.Encryptor

encrypt

Constructor Detail

AbstractFileEncryptor

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

Constructor 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.

AbstractFileEncryptor

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

Constructor with a private key.

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.

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

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

Method Detail

newCipher

protected Cipher newCipher(int operationMode,
                           SecretKey key,
                           AlgorithmParameterSpec paramSpec,
                           String alg)
                    throws NoSuchAlgorithmException,
                           NoSuchPaddingException,
                           InvalidKeyException,
                           InvalidAlgorithmParameterException

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.

Parameters:

operationMode - the operation mode

key - the key

paramSpec - the param spec

alg - the alg

Returns:

the cipher

Throws:

NoSuchAlgorithmException - is thrown if instantiation of the SecretKeyFactory 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.

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.

Specified by:

newCipher in class AbstractCryptor<Cipher,String>

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.

newKeySpec

protected KeySpec newKeySpec(String privateKey,
                             byte[] salt,
                             int iterationCount)

Factory method for creating a new KeySpec from the given private key. 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 KeySpec from the given private key.

Parameters:

privateKey - the private key

salt - the salt

iterationCount - the iteration count

Returns:

the new KeySpec from the given private key.