f96YCGVh

1import javax.crypto.Cipher;
2import javax.crypto.KeyGenerator;
3import javax.crypto.SecretKey;
4import javax.crypto.SecretKeyFactory;
5import javax.crypto.spec.PBEKeySpec;
6import javax.crypto.spec.PBEParameterSpec;
7import javax.crypto.spec.SecretKeySpec;
8import java.security.Key;
9import java.security.SecureRandom;
10import java.security.Security;
11 
12public class SecureProviderTest {
13    @Test
14    public void use_jdk_aes128() throws Exception {
15        String source = "Hala Madrid";
16        // generate key
17        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
18        keyGen.init(128);
19        SecretKey secretKey = keyGen.generateKey();
20        byte[] keyEncoded = secretKey.getEncoded();
21
22        // convert key
23        Key key = new SecretKeySpec(keyEncoded, "AES");
24
25        // encrypt
26        Cipher encryptCipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
27        encryptCipher.init(Cipher.ENCRYPT_MODE, key);
28        byte[] encryptBytes = encryptCipher.doFinal(source.getBytes());
29        String cipherText = Base64.encodeBase64String(encryptBytes);
30        System.out.println("cipher text: " + cipherText);
31
32        // decrypt
33        Cipher decryptCipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
34        decryptCipher.init(Cipher.DECRYPT_MODE, key);
35        byte[] plainBytes = decryptCipher.doFinal(Base64.decodeBase64(cipherText));
36        String plainText = new String(plainBytes);
37        System.out.println("plain text: " + plainText);
38    }
39
40    @Test
41    public void use_bc_aes128() throws Exception {
42        String source = "Hala Madrid";
43        Security.addProvider(new BouncyCastleProvider());
44
45        // generate key
46        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES", "BC");
47        keyGenerator.init(128);
48        SecretKey secretKey = keyGenerator.generateKey();
49        byte[] keyEncoded = secretKey.getEncoded();
50
51        // convert key
52        Key key = new SecretKeySpec(keyEncoded, "AES");
53
54        // encrypt
55        Cipher encryptCipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
56        encryptCipher.init(Cipher.ENCRYPT_MODE, key);
57        byte[] encryptBytes = encryptCipher.doFinal(source.getBytes());
58        String cipherText = Base64.encodeBase64String(encryptBytes);
59        System.out.println("cipher text: " + cipherText);
60
61        // decrypt
62        Cipher decryptCipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
63        decryptCipher.init(Cipher.DECRYPT_MODE, key);
64        byte[] plainBytes = decryptCipher.doFinal(Base64.decodeBase64(cipherText));
65        String plainText = new String(plainBytes);
66        System.out.println("plain text: " + plainText);
67    }
68}