The below code snippet runs fine if included inside the JSP, but when I try to refer the same code from a class file I get "Bad version number in .class file" exception.
JARS used :
- UnlimitedJCEPolicyJDK6:local_policy.jar
- US_export_policy.jar
Java Code to decrypt
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class Decrypt256bit {
private static Key key;
private static Cipher cipher;
static {
key = new SecretKeySpec("P@ssw0Rd!@#**&&&P@ssw0Rd!@#**&&&".getBytes(), "AES");
try {
cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING","SunJCE");
} catch (Exception e) {
e.printStackTrace();
}
}
public static String encryptData(String plainText) {
try {
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encrypted = cipher.doFinal(plainText.getBytes());
return new BASE64Encoder().encode(encrypted);
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
//For testing purpose - to be deleted
public static String decryptData(String encryptedValue) {
try {
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedValue);
int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
System.out.println("Length==="+maxKeyLen);
return new String(cipher.doFinal(decordedValue));
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
public static void main(String... a) {
//String enc = encryptData("TPASU~TPAGU");
//System.out.println("Encrypted text==="+enc);
}
}
