Package com.feedzai.commons.sql.abstraction.util

Class AESHelper

java.lang.Object

com.feedzai.commons.sql.abstraction.util.AESHelper

public final class AESHelper
extends Object

Class to provide encryption and decryption using AES algorithm.

Since:

2.0.0

Author:

Rui Vilao (rui.vilao@feedzai.com)

Constructor Summary

Constructors

Constructor	Description
AESHelper()

Method Summary

Modifier and Type	Method	Description
static byte[]	decrypt(byte[] c, String key)	Decrypts a byte[] encrypted by encrypt(java.lang.String, java.lang.String) method.
static String	decrypt(String c, String key)	Decrypts a string encrypted by encrypt(java.lang.String, java.lang.String) method.
static byte[]	decryptFile(String path, String key)	Decrypts a file encrypted by encryptToFile(String, byte[], String) method.
static String	encrypt(byte[] c, String key)	Encrypts a byte[].
static String	encrypt(String c, String key)	Encrypts a string.
static void	encryptToFile(String path, byte[] buf, String key)	Encrypts the byte[] to a file.
static byte[]	readFile(String filePath)	Reads a file.

Methods inherited from class java.lang.Object

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

Constructor Detail

AESHelper

public AESHelper()

Method Detail

encrypt

public static String encrypt(String c,
                             String key)

Encrypts a string.

Parameters:

c - The string to encrypt.

Returns:

The encrypted string in HEX.

encrypt

public static String encrypt(byte[] c,
                             String key)

Encrypts a byte[].

Parameters:

c - The byte[] to encrypt.

key - The key.

Returns:

The encrypted array as a HEX string.

decrypt

public static String decrypt(String c,
                             String key)

Decrypts a string encrypted by encrypt(java.lang.String, java.lang.String) method.

Parameters:

c - The encrypted HEX string.

key - The key.

Returns:

The decrypted string.

decrypt

public static byte[] decrypt(byte[] c,
                             String key)

Decrypts a byte[] encrypted by encrypt(java.lang.String, java.lang.String) method.

Parameters:

c - The encrypted HEX byte[].

key - The key.

Returns:

The decrypted string in a byte[].

decryptFile

public static byte[] decryptFile(String path,
                                 String key)

Decrypts a file encrypted by encryptToFile(String, byte[], String) method.

Parameters:

path - The file path to decrypt.

key - The key.

Returns:

A decrypted byte[].

encryptToFile

public static void encryptToFile(String path,
                                 byte[] buf,
                                 String key)

Encrypts the byte[] to a file.

Parameters:

path - The destination path.

buf - The buffer.

key - The key.

readFile

public static byte[] readFile(String filePath)
                       throws IOException

Reads a file.

Parameters:

filePath - The file path.

Returns:

a byte[] The file data.

Throws:

IOException - if an error occurs reading the file or if the file does not exists.