It gives me a error when I try to compile it in terminal. It prints out this error:
-bash-4.1$ javac CPS3498/HW_Ch2/encrypt.java
CPS3498/HW_Ch2/encrypt.java:9: cannot find symbol
symbol : class Base64
location: package java.util
import java.util.Base64;
^
CPS3498/HW_Ch2/encrypt.java:61: cannot find symbol
symbol : variable Base64
location: class encrypt
String encryptedValue = Base64.getEncoder().encodeToString(encVal);
^
2 errors
I completely lost on how to fix this problem. I have tried different java utilities to compile and they all give me almost the same error.
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
//create public class encrypt
public class encrypt {
//algorithm AES 128 with a secret key
private static final String ALGO = "AES";
private static final byte[] keyValue =
new byte[] { 'H', 't', 'v', 'b', 'a', 'w', 'e',
'i', 'n', 'v', 'a','l', 't', 'k', 'y', 'e' };
private static BufferedReader reader;
public static void main(String[] args) throws Exception {
//Filereader letter to read from a file letter.txt
FileReader letter = new FileReader("/Users/Shiv/Eclipse/CPS3498_HW/src/letter.txt");
reader = new BufferedReader(letter);
//string text blank, data that stres reader contents.
String text = "";
String data = reader.readLine();
//while loop to see if data is not blank
while (data != null){
text += data;
data = reader.readLine();
}
String textEnc = encrypt(text);
//
File secret = new File("/Users/Shiv/Eclipse/CPS3498_HW/src/secret.txt");
try
{
secret.createNewFile();
}
catch(Exception e)
{
e.printStackTrace();
}
try {
FileWriter secretFile = new FileWriter(secret);
BufferedWriter secretBuff = new BufferedWriter(secretFile);
secretBuff.write(textEnc);
secretBuff.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
//encrypt method
public static String encrypt(String Data) throws Exception {
Key pass = generateKey();
// cipher class to provide the encryption and intialize
Cipher c = Cipher.getInstance(ALGO);
c.init(Cipher.ENCRYPT_MODE, pass);
byte[] encVal = c.doFinal(Data.getBytes());
String encryptedValue = Base64.getEncoder().encodeToString(encVal);
return encryptedValue;
}
//generateKey method to generate a secret key
private static Key generateKey() throws Exception {
Key pass = new SecretKeySpec(keyValue, ALGO);
return pass;
}
}
src: Which Java library provides base64 encoding/decoding?
Java 6 and 7
Since Java 6 you can use the lesser known class javax.xml.bind.DatatypeConverter. This is part of the JRE, no extra libraries required.
byte[] message = "hello world".getBytes("UTF-8");
String encoded = DatatypeConverter.printBase64Binary(message);
byte[] decoded = DatatypeConverter.parseBase64Binary(encoded);
System.out.println(encoded);
System.out.println(new String(decoded, "UTF-8"));
Output
aGVsbG8gd29ybGQ= hello world