org.ow2.proactive.authentication.crypto

Class KeyPairUtil

java.lang.Object

org.ow2.proactive.authentication.crypto.KeyPairUtil

public class KeyPairUtil
extends Object

Asymmetric cryptography utilities for KeyPair generation, encryption and decryption

Refer to the Java Cryptography Extension Reference Guide to determine which parameters are best for key algorithm, key size and cipher; although "RSA", 1024 and "RSA/ECB/PKCS1Padding" should be good enough in most cases.

Since:

ProActive Scheduling 1.1

Constructor Summary

Constructors

Constructor and Description
KeyPairUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	decrypt(PrivateKey privKey, String cipherParams, byte[] message) Decrypt a message using asymmetric keys
static byte[]	encrypt(PublicKey pubKey, String cipherParams, byte[] message) Encrypt a message using asymmetric keys
static KeyPair	generateKeyPair(String algorithm, int size)
static void	generateKeyPair(String algorithm, int size, String privPath, String pubPath) Generates a pair of public and private keys

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyPairUtil

public KeyPairUtil()

Method Detail

generateKeyPair

public static void generateKeyPair(String algorithm,
                                   int size,
                                   String privPath,
                                   String pubPath)
                            throws KeyException

Generates a pair of public and private keys

Parameters:

algorithm - algorithm used for key generation, ie RSA

size - size of the generated key, must be power of 2 and greater than 512

privPath - path to file to which the generated private key will be saved

pubPath - path to file to which the generated public key will be saved

Throws:

KeyException - key generation or saving failed

generateKeyPair

public static KeyPair generateKeyPair(String algorithm,
                                      int size)
                               throws KeyException

Throws:

KeyException

encrypt

public static byte[] encrypt(PublicKey pubKey,
                             String cipherParams,
                             byte[] message)
                      throws KeyException

Encrypt a message using asymmetric keys

Parameters:

pubKey - public key used for encryption

cipherParams - cipher parameters: transformations (ie RSA/ECB/NoPadding)

message - the message to encrypt

Returns:

the encrypted message

Throws:

KeyException - encryption failed, public key recovery failed

decrypt

public static byte[] decrypt(PrivateKey privKey,
                             String cipherParams,
                             byte[] message)
                      throws KeyException

Decrypt a message using asymmetric keys

Parameters:

privKey - Private key used for decryption

cipherParams - cipher parameters: transformations (ie RSA/ECB/NoPadding)

message - the encrypted message

Returns:

the decrypted message

Throws:

KeyException - private key recovery failed, decryption failed