Package cn.dlysxx.www.common.crypto

Class AESCryptoUtil

java.lang.Object

cn.dlysxx.www.common.crypto.AESCryptoUtil

public class AESCryptoUtil
extends Object

Class to encrypt/decrypt file or string in AES.

Constructor Summary

Constructors

Constructor	Description
AESCryptoUtil()

Method Summary

Modifier and Type	Method	Description
static void	decryptFile(String inputFilePath, String outputFilePath, String password)	Decrypt file in AES.
static byte[]	decryptString(String encrypted, String password)	Decrypt AES encrypted String.
static void	encryptFile(String inputFilePath, String outputFilePath, String password)	Encrypt file in AES.
static byte[]	encryptString(String plainText, String password)	Encrypt plain text.

Methods inherited from class java.lang.Object

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

Constructor Details

AESCryptoUtil

public AESCryptoUtil()

Method Details

encryptString

public static byte[] encryptString(String plainText,
 String password)
                            throws InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException

Encrypt plain text. IMPORTANT: text should use UTF-8.

Parameters:

plainText - UTF-8 encoded text

password - AES password

Returns:

encrypted data byte array

Throws:

InvalidKeyException - Invalid Key Exception

InvalidAlgorithmParameterException - Invalid Algorithm Parameter Exception

IllegalBlockSizeException - Illegal Block Size Exception

BadPaddingException - Bad Padding Exception

decryptString

public static byte[] decryptString(String encrypted,
 String password)
                            throws InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException

Decrypt AES encrypted String. IMPORTANT: text should use UTF-8.

Parameters:

encrypted - encrypted String with UTF-8 encoded

password - AES password

Returns:

decrypted byte array

Throws:

InvalidKeyException - Invalid Key Exception

InvalidAlgorithmParameterException - Invalid Algorithm Parameter Exception

IllegalBlockSizeException - Illegal Block Size Exception

BadPaddingException - Bad Padding Exception

encryptFile

public static void encryptFile(String inputFilePath,
 String outputFilePath,
 String password)
                        throws InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException,
IOException

Encrypt file in AES.

Parameters:

inputFilePath - input file path

outputFilePath - encrypted file path

password - AES password

Throws:

InvalidKeyException - Invalid Key Exception

InvalidAlgorithmParameterException - Invalid Algorithm Parameter Exception

IllegalBlockSizeException - Illegal Block Size Exception

BadPaddingException - Bad Padding Exception

IOException - IOException

decryptFile

public static void decryptFile(String inputFilePath,
 String outputFilePath,
 String password)
                        throws IOException,
InvalidKeyException,
InvalidAlgorithmParameterException,
IllegalBlockSizeException,
BadPaddingException

Decrypt file in AES.

Parameters:

inputFilePath - encrypted file path

outputFilePath - output decrypted file path

password - AES password

Throws:

IOException - IOException

InvalidKeyException - Invalid Key Exception

InvalidAlgorithmParameterException - Invalid Algorithm Parameter Exception

IllegalBlockSizeException - Illegal Block Size Exception

BadPaddingException - Bad Padding Exception