dSuTUY1C

1Cipher cipher;
2SecretKey secretKey;
3
4String password = "password123";
5
6byte[] encodedKey = Base64.getEncoder().encode(password.getBytes());
7
8try {
9    MessageDigest sha = MessageDigest.getInstance("SHA-1");
10    encodedKey = sha.digest(encodedKey);
11    encodedKey = Arrays.copyOf(encodedKey, 16);
12    key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
13    return key;
14} catch (Exception e) {
15    e.printStackTrace();
16} 
17     
18Cipher cipher;
19
20try {
21    cipher = Cipher.getInstance("AES");
22    cipher.init(Cipher.ENCRYPT_MODE, key);
23
24    byte[] cipherText = cipher.doFinal("thisisamessage".getBytes());
25
26    System.out.println(cipherText);
27} catch(Exception e) {
28    e.printStackTrace();
29} 
30     
31Cipher cipher;
32
33try {
34    cipher = Cipher.getInstance("AES");
35    cipher.init(Cipher.DECRYPT_MODE, key);
36
37    byte[] plainText= cipher.doFinal(encrypted_message.getBytes());
38
39    System.out.println(plainText);
40} catch(Exception e) {
41    e.printStackTrace();
42}