cz.d1x.dxcrypto.encryption.crypto

Class AsymmetricAlgorithm

java.lang.Object

cz.d1x.dxcrypto.encryption.crypto.AsymmetricAlgorithm

All Implemented Interfaces:

EncryptionAlgorithm

public final class AsymmetricAlgorithm
extends Object
implements EncryptionAlgorithm

Main implementation of encryption algorithms that use asymmetric key pair based on existing javax.crypto package.

This implementation can provide both encoding and decoding or only one of these functions depending on what key was provided during instantiation. Public key is needed for encryption, private key for decryption.

Inputs and outputs from this encryption are bytes represented in HEX string.

This class is immutable and can be considered thread safe. It is not allowed to extend this class to ensure it stays that way.

Author:

Zdenek Obst, zdenek.obst-at-gmail.com

See Also:

RSABuilder

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AsymmetricAlgorithm(String cipherName, CryptoKeyFactory publicKeyFactory, CryptoKeyFactory privateKeyFactory, String encoding)

Method Summary

Modifier and Type	Method and Description
byte[]	decrypt(byte[] input) Decrypts specified array of bytes.
String	decrypt(String input) Decrypts specified input text using default UTF-8 encoding.
byte[]	encrypt(byte[] input) Encrypts specified array of bytes.
String	encrypt(String input) Encrypts specified input text.

Methods inherited from class java.lang.Object

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

Constructor Detail

AsymmetricAlgorithm

protected AsymmetricAlgorithm(String cipherName,
                              CryptoKeyFactory publicKeyFactory,
                              CryptoKeyFactory privateKeyFactory,
                              String encoding)

Method Detail

encrypt

public byte[] encrypt(byte[] input)
               throws EncryptionException

Description copied from interface: EncryptionAlgorithm

Encrypts specified array of bytes.

Specified by:

encrypt in interface EncryptionAlgorithm

Parameters:

input - input bytes to be encrypted

Returns:

encrypted bytes

Throws:

EncryptionException - possible exception when encryption fails

encrypt

public String encrypt(String input)
               throws EncryptionException

Description copied from interface: EncryptionAlgorithm

Encrypts specified input text.

Specified by:

encrypt in interface EncryptionAlgorithm

Parameters:

input - input text to be encrypted

Returns:

encrypted text

Throws:

EncryptionException - possible exception when encryption fails

decrypt

public byte[] decrypt(byte[] input)
               throws EncryptionException

Description copied from interface: EncryptionAlgorithm

Decrypts specified array of bytes.

Specified by:

decrypt in interface EncryptionAlgorithm

Parameters:

input - input bytes to be decrypted

Returns:

decrypted bytes

Throws:

EncryptionException - possible exception when decryption fails

decrypt

public String decrypt(String input)
               throws EncryptionException

Description copied from interface: EncryptionAlgorithm

Decrypts specified input text using default UTF-8 encoding.

Specified by:

decrypt in interface EncryptionAlgorithm

Parameters:

input - input text to be decrypted

Returns:

decrypted text

Throws:

EncryptionException - possible exception when decryption fails