List of usage examples for javax.crypto KeyGenerator generateKey
public final SecretKey generateKey()
From source file:piecework.security.concrete.ExampleBouncyCastleEncryptionService.java
@Override public String generateKey(int keySize) throws NoSuchAlgorithmException, InvalidKeySpecException, UnsupportedEncodingException { LOG.info("Generating a new encryption key of size " + keySize); KeyGenerator keyGen = KeyGenerator.getInstance("AES"); keyGen.init(keySize);//from w w w.j av a 2s.c o m SecretKey secretKey = keyGen.generateKey(); return new String(Base64.encode(secretKey.getEncoded()), "UTF-8"); }
From source file:pl.mwaleria.safecommunicator.core.cipher.CipherManager.java
public byte[] encrypt(byte[] input, PublicKey publicKey) throws CryptoException { try {//from www .j a v a 2s . co m KeyGenerator generator = KeyGenerator.getInstance(Constants.CIPHER_SYMETRIC_ALGORITHM); generator.init(Constants.CIPHER_SYMETRIC_SIZE); SecretKey key = generator.generateKey(); byte[] aesKey = key.getEncoded(); byte[] cryptedAesKey = this.encryptAsymetric(aesKey, publicKey); Cipher cipher = Cipher.getInstance(Constants.CIPHER_SYMETRIC_INSTANCE); cipher.init(Cipher.ENCRYPT_MODE, key); return ArrayUtils.addAll(cryptedAesKey, cipher.doFinal(input)); } catch (NoSuchAlgorithmException | InvalidKeyException | NoSuchPaddingException | IllegalBlockSizeException | BadPaddingException ex) { Logger.getLogger(CipherManager.class.getName()).log(Level.SEVERE, null, ex); throw new CryptoException(ex); } }
From source file:enc_mods.aes.java
public void setKey() { try {/*from w w w. ja va 2 s .c o m*/ KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(AES_Key_Size); SecretKey aeskey = kgen.generateKey(); key = aeskey.getEncoded(); secretkey = new SecretKeySpec(key, "AES"); } catch (Exception e) { e.printStackTrace(); } }
From source file:com.mhs.hboxmaintenanceserver.utils.Utils.java
/** * Blowfish encryption// ww w.j a v a 2s. c om * * @param value * @return * @throws java.lang.Exception */ public static String encrypt(String value) throws Exception { // create a key generator based upon the Blowfish cipher KeyGenerator keygenerator = KeyGenerator.getInstance("Blowfish"); File file = new File(DefaultConfig.SECRET_KEY); SecretKey secretkey; if (file.exists()) { // Load key from file secretkey = new SecretKeySpec(FileUtils.readFileToByteArray(file), "Blowfish"); } else { // create a key secretkey = keygenerator.generateKey(); FileUtils.writeByteArrayToFile(file, secretkey.getEncoded()); } // create a cipher based upon Blowfish Cipher cipher = Cipher.getInstance("Blowfish"); // initialise cipher to with secret key cipher.init(Cipher.ENCRYPT_MODE, secretkey); // encrypt message return bytesToHex(cipher.doFinal(value.getBytes())); }
From source file:com.bamboocloud.im.provisioner.json.crypto.simple.SimpleEncryptor.java
/** * Encrypts using an asymmetric cipher./*from w w w . j a v a 2 s . c om*/ * * @param value the value to be encrypted. * @return the encrypted value. * @throws GeneralSecurityException if a cryptographic operation failed. * @throws IOException if an I/O exception occurred. */ private Object asymmetric(Object object) throws GeneralSecurityException, IOException { String symmetricCipher = "AES/ECB/PKCS5Padding"; // no IV required for randomly-generated session key KeyGenerator generator = KeyGenerator.getInstance("AES"); generator.init(128); SecretKey sessionKey = generator.generateKey(); Cipher symmetric = Cipher.getInstance(symmetricCipher); symmetric.init(Cipher.ENCRYPT_MODE, sessionKey); String data = Base64.encodeBase64String(symmetric.doFinal(mapper.writeValueAsBytes(object))); Cipher asymmetric = Cipher.getInstance(cipher); asymmetric.init(Cipher.ENCRYPT_MODE, key); HashMap<String, Object> keyObject = new HashMap<String, Object>(); keyObject.put("cipher", this.cipher); keyObject.put("key", this.alias); keyObject.put("data", Base64.encodeBase64String(asymmetric.doFinal(sessionKey.getEncoded()))); HashMap<String, Object> result = new HashMap<String, Object>(); result.put("cipher", symmetricCipher); result.put("key", keyObject); result.put("data", data); return result; }
From source file:com.piusvelte.taplock.server.TapLockServer.java
protected static String encryptString(String decStr) { String encStr = null;//from www . j av a 2 s . co m KeyStore ks = getKeyStore(); if (ks != null) { SecretKey sk = getSecretKey(ks); if (sk == null) { // create key KeyGenerator kgen = null; try { kgen = KeyGenerator.getInstance("AES"); } catch (NoSuchAlgorithmException e) { writeLog("encryptString: " + e.getMessage()); } if (kgen != null) { int keyLength; try { keyLength = Cipher.getMaxAllowedKeyLength("AES"); } catch (NoSuchAlgorithmException e) { keyLength = 128; writeLog("encryptString: " + e.getMessage()); } kgen.init(keyLength); sk = kgen.generateKey(); // create a keystore try { ks.load(null, sPassphrase.toCharArray()); ks.setKeyEntry(TAP_LOCK, sk, sPassphrase.toCharArray(), null); ks.store(new FileOutputStream(sKeystore), sPassphrase.toCharArray()); } catch (NoSuchAlgorithmException e) { writeLog("encryptString: " + e.getMessage()); } catch (CertificateException e) { writeLog("encryptString: " + e.getMessage()); } catch (IOException e) { writeLog("encryptString: " + e.getMessage()); } catch (KeyStoreException e) { writeLog("encryptString: " + e.getMessage()); } } } if ((sk != null) && (decStr != null)) { Cipher cipher; try { cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, sk); return new String(Base64.encodeBase64(cipher.doFinal(decStr.getBytes("UTF-8")))); } catch (NoSuchAlgorithmException e) { writeLog("encryptString: " + e.getMessage()); } catch (NoSuchPaddingException e) { writeLog("encryptString: " + e.getMessage()); } catch (InvalidKeyException e) { writeLog("encryptString: " + e.getMessage()); } catch (IllegalBlockSizeException e) { writeLog("encryptString: " + e.getMessage()); } catch (BadPaddingException e) { writeLog("encryptString: " + e.getMessage()); } catch (UnsupportedEncodingException e) { writeLog("encryptString: " + e.getMessage()); } } } return encStr; }
From source file:org.nuxeo.ecm.core.blob.binary.TestAESBinaryManager.java
protected void createKeyStore(File file) throws GeneralSecurityException, IOException { AESBinaryManager.setUnlimitedJCEPolicy(); KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(256);//from ww w . j a va 2 s. c o m Key skey = kgen.generateKey(); KeyStore keyStore = KeyStore.getInstance(KEY_STORE_TYPE); // keyStore.load(null, KEY_STORE_PASSWORD.toCharArray()); keyStore.load(null, null); keyStore.setKeyEntry(KEY_ALIAS, skey, KEY_PASSWORD.toCharArray(), null); OutputStream out = new FileOutputStream(file); keyStore.store(out, KEY_STORE_PASSWORD.toCharArray()); out.close(); }
From source file:org.sonar.api.config.AesCipher.java
String generateRandomSecretKey() {
try {//w ww . ja va 2s . co m
KeyGenerator keyGen = KeyGenerator.getInstance(CRYPTO_KEY);
keyGen.init(KEY_SIZE_IN_BITS, new SecureRandom());
SecretKey secretKey = keyGen.generateKey();
return new String(Base64.encodeBase64(secretKey.getEncoded()));
} catch (Exception e) {
throw new IllegalStateException("Fail to generate secret key", e);
}
}
From source file:org.sonar.process.AesCipher.java
String generateRandomSecretKey() {
try {//from w w w .j a v a2 s .c o m
KeyGenerator keyGen = KeyGenerator.getInstance(CRYPTO_KEY);
keyGen.init(KEY_SIZE_IN_BITS, new SecureRandom());
SecretKey secretKey = keyGen.generateKey();
return Base64.encodeBase64String(secretKey.getEncoded());
} catch (Exception e) {
throw new IllegalStateException("Fail to generate secret key", e);
}
}
From source file:net.thewaffleshop.nimbus.api.EncryptionAPI.java
/** * Generate a random AES {@link SecretKey} * * @return//from ww w . ja v a 2 s .co m */ public SecretKey createSecretKey() { try { KeyGenerator keyGen = KeyGenerator.getInstance("AES"); keyGen.init(256); SecretKey key = keyGen.generateKey(); return key; } catch (GeneralSecurityException e) { throw new RuntimeException(e); } }