Здравствуйте... Хочу хешировать пароли в проге...
есть такой класс
| Код |
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.MessageDigest;
import java.util.Arrays;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.spec.SecretKeySpec;
public class EncryptAndDecrypt {
private static String algorithm = "DESede";
private static Key key = null;
private static Cipher cipher = null;
private static EncryptAndDecrypt obj = new EncryptAndDecrypt();
private EncryptAndDecrypt() {
try {
//key = KeyGenerator.getInstance(algorithm).generateKey();
/*
byte[] tsu = ("testdfghdfghdfghdfghdfghGHDF").getBytes("UTF-8");
MessageDigest sha = MessageDigest.getInstance("SHA-1");
keyTemp = sha.digest(keyTemp);
keyTemp = Arrays.copyOf(keyTemp, 16); // use only first 128 bit
*/
byte[] raw = {'4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4','4'};
key = new javax.crypto.spec.SecretKeySpec(raw, "AES");
cipher = Cipher.getInstance(algorithm);
} catch (Exception e) {
}
}
public static EncryptAndDecrypt getInstance() {
return obj;
}
public static byte[] encrypt(String input) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] inputBytes = input.getBytes();
return cipher.doFinal(inputBytes);
}
/**
*
* @param input
* @return
* @throws InvalidKeyException
* @throws BadPaddingException
* @throws IllegalBlockSizeException
*/
public static String getEncryptStringValue(String input) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
return new String(encrypt(input));
}
/**
*
* @param encryptionBytes
* @return
* @throws InvalidKeyException
* @throws BadPaddingException
* @throws IllegalBlockSizeException
*/
public static String decrypt(byte[] encryptionBytes) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] recoveredBytes =
cipher.doFinal(encryptionBytes);
String recovered =
new String(recoveredBytes);
return recovered;
}
/**
*
* @param encryptionBytes
* @return
* @throws InvalidKeyException
* @throws BadPaddingException
* @throws IllegalBlockSizeException
*/
public static String decrypt(String encryptionBytes) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
return EncryptAndDecrypt.decrypt(encryptionBytes.getBytes());
}
}
|
Если так делать
| Код |
key = KeyGenerator.getInstance(algorithm).generateKey();
|
То пашет... но каждый раз новый ключ... а я данные в базу пишу толку конечно же нету...
Хотел свой задать... но не могу понять как это делать... строю методом тыка 
Не подскажите как свой ключ сгенерировать?
А то сейчас получаю ошибку
| Код |
Exception in thread "main" java.security.InvalidKeyException: Invalid key length: 32 bytes
at com.sun.crypto.provider.DESedeCipher.engineGetKeySize(DashoA13*..)
at javax.crypto.Cipher.b(DashoA13*..)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at EncryptAndDecrypt.encrypt(EncryptAndDecrypt.java:43)
at Main.encrypt(Main.java:195)
at Main.main(Main.java:47)
|
Не могу понять какой длинны он ключ хочет  |