Class Encryption

java.lang.Object

utils.Encryption

public class Encryption
extends Object

Constructor Summary

Constructors

Constructor	Description
Encryption(String password, String salt)
Encryption(String password, String salt, int iv_size)

Method Summary

Modifier and Type	Method	Description
InputStream	decrypt(InputStream inputStream)	Decrypts a passed input stream and returns it.
Cipher	decryptionCipher(byte[] IV)	Generates a decryption cipher
InputStream	encrypt(InputStream inputStream)	Encrypts the provided input stream and returns it
Cipher	encryptionCipher(byte[] IV)	Generates an encryption cipher based on the passed IV
byte[]	generateIV()	Generates a new IV based on the set size

Methods inherited from class Object

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

Constructor Details

Encryption

public Encryption(String password,
 String salt)
           throws EncryptionException

Throws:

EncryptionException

Encryption

public Encryption(String password,
 String salt,
 int iv_size)
           throws EncryptionException

Parameters:

password - Password

salt - Salt

iv_size - IV Size

Throws:

EncryptionException - if the encryption fails

Method Details

generateIV

public byte[] generateIV()

Generates a new IV based on the set size

Returns:

the new IV

encrypt

public InputStream encrypt(InputStream inputStream)
                    throws EncryptionException

Encrypts the provided input stream and returns it

Parameters:

inputStream - The input stream to encrypt

Returns:

The encrypted input stream

Throws:

EncryptionException - if the encryption fails

decrypt

public InputStream decrypt(InputStream inputStream)
                    throws EncryptionException

Decrypts a passed input stream and returns it. Note that this method will not produce any meaningful output if the IV used on decryption isd different from the one used on encryption

Parameters:

inputStream - The input stream to decrypt

Returns:

The decrypted input stream

Throws:

EncryptionException

encryptionCipher

public Cipher encryptionCipher(byte[] IV)
                        throws EncryptionException

Generates an encryption cipher based on the passed IV

Parameters:

IV - The IV to use

Returns:

The encryption cipher

Throws:

EncryptionException - If the cipher generation fails

decryptionCipher

public Cipher decryptionCipher(byte[] IV)
                        throws EncryptionException

Generates a decryption cipher

Parameters:

IV - The IV to use

Returns:

The generated cipher

Throws:

EncryptionException