io.macronova.kafka.common.serialization.utils

Class EncryptionHelper

java.lang.Object

io.macronova.kafka.common.serialization.utils.EncryptionHelper

public abstract class EncryptionHelper
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
EncryptionHelper()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	extractAlgorithm(java.lang.String transformation)
static int	getKeyLength(java.security.PrivateKey pk)
static int	getKeyLength(java.security.PublicKey pk)
static javax.crypto.Cipher	initializeCipher(int mode, java.lang.String transformation, byte[] secret, java.io.InputStream inputStream, java.io.OutputStream outputStream) Initialize cipher.
static javax.crypto.Cipher	initializeCipher(int mode, java.lang.String transformation, java.security.Key key, java.io.InputStream inputStream, java.io.OutputStream outputStream) Initialize cipher.
static java.security.Signature	initializeSignature(java.lang.String algorithm, java.security.Key key, boolean sign)
static int	ivLength(java.lang.String transformation, javax.crypto.Cipher cipher)
static java.security.KeyStore	loadKeyStore(java.lang.String keystorePath, java.lang.String type, char[] password)
static byte[]	randomIV(java.lang.String transformation, javax.crypto.Cipher cipher)
static boolean	requiresIV(java.lang.String transformation)

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptionHelper

public EncryptionHelper()

Method Detail

initializeCipher

public static javax.crypto.Cipher initializeCipher(int mode,
                                                   java.lang.String transformation,
                                                   java.security.Key key,
                                                   java.io.InputStream inputStream,
                                                   java.io.OutputStream outputStream)
                                            throws java.lang.Exception

Initialize cipher. Depending on mode, function:

• generates random initialization vector and appends it to output stream (encryption).
• reads initialization vector from input stream (decryption).

Parameters:

mode - Encrypt or decrypt mode.

transformation - Encryption algorithm.

key - Private or public key depending on usage.

inputStream - Encrypted input stream to read IV from. May be null in case of encryption mode.

outputStream - Encryption output stream. May be null in case of decryption mode.

Returns:

Initialized cipher.

Throws:

java.lang.Exception - Indicates failure.

initializeCipher

public static javax.crypto.Cipher initializeCipher(int mode,
                                                   java.lang.String transformation,
                                                   byte[] secret,
                                                   java.io.InputStream inputStream,
                                                   java.io.OutputStream outputStream)
                                            throws java.lang.Exception

Initialize cipher. Depending on mode, function:

• generates random initialization vector and appends it to output stream (encryption).
• reads initialization vector from input stream (decryption).

Parameters:

mode - Encrypt or decrypt mode.

transformation - Encryption algorithm.

secret - Symmetric cryptography secret key.

inputStream - Encrypted input stream to read IV from. May be null in case of encryption mode.

outputStream - Encryption output stream. May be null in case of decryption mode.

Returns:

Initialized cipher.

Throws:

java.lang.Exception - Indicates failure.

initializeSignature

public static java.security.Signature initializeSignature(java.lang.String algorithm,
                                                          java.security.Key key,
                                                          boolean sign)
                                                   throws java.lang.Exception

Throws:

java.lang.Exception

loadKeyStore

public static java.security.KeyStore loadKeyStore(java.lang.String keystorePath,
                                                  java.lang.String type,
                                                  char[] password)
                                           throws java.lang.Exception

Throws:

java.lang.Exception

getKeyLength

public static int getKeyLength(java.security.PublicKey pk)

getKeyLength

public static int getKeyLength(java.security.PrivateKey pk)

requiresIV

public static boolean requiresIV(java.lang.String transformation)

ivLength

public static int ivLength(java.lang.String transformation,
                           javax.crypto.Cipher cipher)

extractAlgorithm

public static java.lang.String extractAlgorithm(java.lang.String transformation)

randomIV

public static byte[] randomIV(java.lang.String transformation,
                              javax.crypto.Cipher cipher)