org.eparapher.core.crypto
Class EPKeyManager

java.lang.Object
  org.eparapher.core.crypto.EPKeyManager

public class EPKeyManager
extends Object

Constructor Summary

EPKeyManager()

Method Summary

static byte[]	decryptWithSymetricKey(SecretKey sKey, byte[] cipheredBits) Decrypt with the given symetric key
static byte[]	encryptWithSymetricKey(SecretKey sKey, byte[] clearbits) Encrypt with the given symetric key
static KeyPair	genAsymetricKey(String algo, int size) Generate an asymetric key pair
static SecretKey	genSymetricKey(String algo, int size) Generate a new symetric key

Methods inherited from class java.lang.Object

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

Constructor Detail

EPKeyManager

public EPKeyManager()

Method Detail

genSymetricKey

public static SecretKey genSymetricKey(String algo,
                                       int size)
                                throws NoSuchAlgorithmException,
                                       NoSuchProviderException

Generate a new symetric key

Parameters:

algo - Algorithm name

size - Key size

Throws:

NoSuchProviderException

NoSuchAlgorithmException

encryptWithSymetricKey

public static byte[] encryptWithSymetricKey(SecretKey sKey,
                                            byte[] clearbits)
                                     throws NoSuchAlgorithmException,
                                            NoSuchPaddingException,
                                            InvalidKeyException,
                                            IllegalBlockSizeException,
                                            BadPaddingException

Encrypt with the given symetric key

Parameters:

sKey - the secret key used for encryption

clearBits - Data to encrypt

Throws:

NoSuchPaddingException

NoSuchAlgorithmException

InvalidKeyException

BadPaddingException

IllegalBlockSizeException

decryptWithSymetricKey

public static byte[] decryptWithSymetricKey(SecretKey sKey,
                                            byte[] cipheredBits)
                                     throws NoSuchAlgorithmException,
                                            NoSuchPaddingException,
                                            InvalidKeyException,
                                            IllegalBlockSizeException,
                                            BadPaddingException

Decrypt with the given symetric key

Parameters:

sKey - the secret key used for decryption

cipheredBits - Encrypted data

Returns:

Decrypted data in a byte array

Throws:

NoSuchPaddingException

NoSuchAlgorithmException

InvalidKeyException

BadPaddingException

IllegalBlockSizeException

genAsymetricKey

public static KeyPair genAsymetricKey(String algo,
                                      int size)
                               throws NoSuchAlgorithmException,
                                      NoSuchProviderException

Generate an asymetric key pair

Parameters:

algo - The symetric Algorithm : usually RSA, DSA or ECDSA

size - The size of the KeyPair, usually in bytes

Returns:

The KeyPair

Throws:

NoSuchProviderException

NoSuchAlgorithmException