8E95Mu1s

1public static void main(String[] args) throws Exception {
2
3    String fileWithKeyStore = "test.keystore";
4    KeyStore keyStore = JKSTest.createKeyStore(fileWithKeyStore, "pwdForKeyStoreFile");
5
6    storeKeyInKeyStore(keyStore, fileWithKeyStore);
7    // retriveKeyFromKeyStore(keyStore);
8
9}
10
11public static void storeKeyInKeyStore(KeyStore keyStore, String fileWithKeyStore) throws Exception {
12
13    System.out.println(keyStore.getType()); // JCEKS
14
15    /** Storing in key value format like map but with password */
16    SecretKey secretKey = KeyGenerator.getInstance("AES").generateKey(); // JWT-Key
17
18    keyStore.setEntry("map_key", new KeyStore.SecretKeyEntry(secretKey),
19            new PasswordProtection("pwdForMapEntry".toCharArray()));
20
21    keyStore.store(new FileOutputStream(fileWithKeyStore), "pwdForStoringFile".toCharArray());
22    System.out.println("Stored Key:t" + secretKey);
23
24}
25
26public static void retriveKeyFromKeyStore(KeyStore keyStore)
27        throws NoSuchAlgorithmException, UnrecoverableEntryException, KeyStoreException {
28
29    KeyStore.Entry entry = keyStore.getEntry("map_key", new PasswordProtection("pwdForMapEntry".toCharArray()));
30    SecretKey keyFound = ((KeyStore.SecretKeyEntry) entry).getSecretKey();
31    System.out.println("Found Key:t" + keyFound);
32
33}
34
35
36public static KeyStore createKeyStore(String fileName, String pw) throws Exception {
37    File file = new File(fileName);
38
39    final KeyStore keyStore = KeyStore.getInstance("JCEKS");
40    if (file.exists()) {
41        // .keystore file already exists => load it
42        keyStore.load(new FileInputStream(file), pw.toCharArray());
43        System.out.println("Existing .keystore file loaded!"+file.getAbsolutePath());
44    } else {
45        // .keystore file not created yet => create it
46        keyStore.load(null, null);
47        keyStore.store(new FileOutputStream(fileName), pw.toCharArray());
48        System.out.println("New .keystore file created!");
49    }
50
51    return keyStore;
52}