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1package com.syntax.crypter;
2
3import javax.crypto.KeyGenerator;
4import javax.crypto.SecretKey;
5import javax.crypto.Cipher;
6import javax.crypto.spec.SecretKeySpec;
7import java.io.*;
8
9/**
10  * @author Synt[a]x
11 */
12public class Crypter {
13    public static void main(String[] argS) throws Exception {
14        File file = new File(argS[0]);
15        InputStream str = new FileInputStream(file);
16        OutputStream output = new FileOutputStream(new File(argS[1]));
17        long length = file.length();
18        if (length > Integer.MAX_VALUE) {
19            System.out.println("[Crypter] Filesize too large.");
20        }
21        byte[] fileBytes = new byte[(int) length]; //Array to load file into
22        int offset = 0;
23        int numRead = 0;
24        while (offset < fileBytes.length
25                && (numRead = str.read(fileBytes, offset, fileBytes.length - offset)) >= 0) {
26            offset += numRead;
27        str.close();
28        System.out.println("[Crypter] Read " + offset + " bytes.");
29        offset = 0;
30        System.out.println("[Crypter] Going to crypt using AES");
31        KeyGenerator keygen = KeyGenerator.getInstance("AES");
32        keygen.init(128);
33        SecretKey skey = keygen.generateKey();
34        byte[] raw = skey.getEncoded();
35        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
36        Cipher cipher = Cipher.getInstance("AES");
37        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
38        byte[] aescrypted = cipher.doFinal(fileBytes);
39        output.write(aescrypted);
40        output.close();
41        System.out.println("[Crypter] Wrote " + aescrypted.length + " crypted bytes.");
42    }
43}