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- import java.security.spec.KeySpec;
- import javax.crypto.Cipher;
- import javax.crypto.SecretKey;
- import javax.crypto.SecretKeyFactory;
- import javax.crypto.spec.IvParameterSpec;
- import javax.crypto.spec.PBEKeySpec;
- import javax.crypto.spec.SecretKeySpec;
- import sun.misc.BASE64Decoder;
- import sun.misc.BASE64Encoder;
- public class AESEncrypter {
- private static final byte[] SALT = {
- (byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
- (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03
- };
- private static final int ITERATION_COUNT = 65536;
- private static final int KEY_LENGTH = 256;
- private Cipher ecipher;
- private Cipher dcipher;
- AESEncrypter(String passPhrase) throws Exception {
- SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
- KeySpec spec = new PBEKeySpec(passPhrase.toCharArray(), SALT, ITERATION_COUNT, KEY_LENGTH);
- SecretKey tmp = factory.generateSecret(spec);
- SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
- ecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
- ecipher.init(Cipher.ENCRYPT_MODE, secret);
- dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
- byte[] iv = ecipher.getParameters().getParameterSpec(IvParameterSpec.class).getIV();
- dcipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));
- }
- public String encrypt(String encrypt) throws Exception {
- byte[] bytes = encrypt.getBytes("UTF8");
- byte[] encrypted = encrypt(bytes);
- return new BASE64Encoder().encode(encrypted);
- }
- public byte[] encrypt(byte[] plain) throws Exception {
- return ecipher.doFinal(plain);
- }
- public String decrypt(String encrypt) throws Exception {
- byte[] bytes = new BASE64Decoder().decodeBuffer(encrypt);
- byte[] decrypted = decrypt(bytes);
- return new String(decrypted, "UTF8");
- }
- public byte[] decrypt(byte[] encrypt) throws Exception {
- return dcipher.doFinal(encrypt);
- }
- public static void main(String[] args) throws Exception {
- String message = "MESSAGE";
- String password = "PASSWORD";
- AESEncrypter encrypter = new AESEncrypter(password);
- String encrypted = encrypter.encrypt(message);
- String decrypted = encrypter.decrypt(encrypted);
- System.out.println("Encrypt(\"" + message + "\", \"" + password + "\") = \"" + encrypted + "\"");
- System.out.println("Decrypt(\"" + encrypted + "\", \"" + password + "\") = \"" + decrypted + "\"");
- }
- }
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