I want to encrypt a message with AES encryption techniques.
When i use this code i got some error as
java.security.InvalidKeyException: Illegal key size or default parameters
My Encryption code :
public class Encryption {
public static class MessageEncrypt {
public static class AES {
private final static String ALGO = "AES";
private String secretKey;
private String data;
public String encrypt(String secretKey, String data) throws Exception {
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec spec = new PBEKeySpec(secretKey.toCharArray(), secretKey.getBytes(), 128, 256);
SecretKey tmp = factory.generateSecret(spec);
SecretKey key = new SecretKeySpec(tmp.getEncoded(), ALGO);
Cipher cipher = Cipher.getInstance(ALGO);
cipher.init(Cipher.ENCRYPT_MODE, key);
return toHex(cipher.doFinal(data.getBytes()));
}
public String decrypt(String secretKey, String data) throws Exception {
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec spec = new PBEKeySpec(secretKey.toCharArray(), secretKey.getBytes(), 128, 256);
SecretKey tmp = factory.generateSecret(spec);
SecretKey key = new SecretKeySpec(tmp.getEncoded(), ALGO);
Cipher cipher = Cipher.getInstance(ALGO);
cipher.init(Cipher.DECRYPT_MODE, key);
return new String(cipher.doFinal(toByte(data)));
}
private static byte[] toByte(String hexString) {
int len = hexString.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++)
result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2), 16).byteValue();
return result;
}
public static String toHex(byte[] stringBytes) {
StringBuffer result = new StringBuffer(2 * stringBytes.length);
for (int i = 0; i < stringBytes.length; i++) {
result.append(HEX.charAt((stringBytes[i] >> 4) & 0x0f)).append(HEX.charAt(stringBytes[i] & 0x0f));
}
return result.toString();
}
private final static String HEX = "0123456789ABCDEF";
}
}
static class DataEncrypt {
}
}
My Testing Program :
public class Testing {
public static void main(String[] args) throws Exception {
AES cryptoAES = new AES();
System.out.println(cryptoAES.encrypt("43234sfeff", "re"));
}
}
When i run this i got this error as:
Exception in thread "main" java.security.InvalidKeyException: Illegal key size or default parameters
at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1021)
at javax.crypto.Cipher.implInit(Cipher.java:796)
at javax.crypto.Cipher.chooseProvider(Cipher.java:859)
at javax.crypto.Cipher.init(Cipher.java:1229)
at javax.crypto.Cipher.init(Cipher.java:1166)
at com.detroit.Encryption$MessageEncrypt$AES.encrypt(Encryption.java:35)
at testing.Testing.main(Testing.java:10)
Working in Android Studio :
But the Same code working in Android (Android Studio), but when i run the same code in netbeans i got such kind of errors.
