public CipherTransformer(List<CipherSpec> cipherSpecs, SaltedSecretKey masterKey) { this.cipherSpecs = cipherSpecs; this.cipherSession = new CipherSession(masterKey); }
public static void encrypt(InputStream plaintextInputStream, OutputStream ciphertextOutputStream, List<CipherSpec> cipherSpecs, SaltedSecretKey masterKey) throws CipherException { try { CipherSession cipherSession = new CipherSession(masterKey); OutputStream multiCipherOutputStream = new MultiCipherOutputStream(ciphertextOutputStream, cipherSpecs, cipherSession); int read = -1; byte[] buffer = new byte[4096]; while (-1 != (read = plaintextInputStream.read(buffer))) { multiCipherOutputStream.write(buffer, 0, read); } plaintextInputStream.close(); multiCipherOutputStream.close(); } catch (IOException e) { throw new CipherException(e); } }
private void initCipherSession(String masterKeyStr, String masterKeySaltStr) { byte[] masterKeySalt = StringUtil.fromHex(masterKeySaltStr); byte[] masterKeyBytes = StringUtil.fromHex(masterKeyStr); SaltedSecretKey masterKey = new SaltedSecretKey(new SecretKeySpec(masterKeyBytes, "RAW"), masterKeySalt); cipherSession = new CipherSession(masterKey); }
public static byte[] decrypt(InputStream fromInputStream, SaltedSecretKey masterKey) throws CipherException { try { CipherSession cipherSession = new CipherSession(masterKey); MultiCipherInputStream multiCipherInputStream = new MultiCipherInputStream(fromInputStream, cipherSession); ByteArrayOutputStream plaintextOutputStream = new ByteArrayOutputStream(); int read = -1; byte[] buffer = new byte[4096]; while (-1 != (read = multiCipherInputStream.read(buffer))) { plaintextOutputStream.write(buffer, 0, read); } multiCipherInputStream.close(); plaintextOutputStream.close(); return plaintextOutputStream.toByteArray(); } catch (IOException e) { throw new CipherException(e); } }
@Test public void testCipherSessionReadKeyCacheSizeOfThree() throws Exception { SaltedSecretKey masterKey = createDummyMasterKey(); CipherSession cipherSession = new CipherSession(masterKey, 2, 999); CipherSpec cipherSpecAes128 = CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM); byte[] readKeySalt1 = CipherUtil.createRandomArray(cipherSpecAes128.getKeySize()); byte[] readKeySalt2 = CipherUtil.createRandomArray(cipherSpecAes128.getKeySize()); byte[] readKeySalt3 = CipherUtil.createRandomArray(cipherSpecAes128.getKeySize()); SaltedSecretKey readSecretKey1Aes128 = cipherSession.getReadSecretKey(cipherSpecAes128, readKeySalt1); SaltedSecretKey readSecretKey2Aes128 = cipherSession.getReadSecretKey(cipherSpecAes128, readKeySalt2); SaltedSecretKey readSecretKey3Aes128 = cipherSession.getReadSecretKey(cipherSpecAes128, readKeySalt3); assertNotSame(readSecretKey1Aes128, readSecretKey2Aes128); assertNotSame(readSecretKey1Aes128, readSecretKey3Aes128); assertNotSame(readSecretKey2Aes128, readSecretKey3Aes128); // TODO [medium] This does NOT TEST the actual read cache. How to test this. The cache is completely hidden/private?! }
@Test public void testCipherSessionWriteKeyReuseCountOfTwo() throws Exception { SaltedSecretKey masterKey = createDummyMasterKey(); CipherSession cipherSession = new CipherSession(masterKey, 999, 2); CipherSpec cipherSpecAes128 = CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM); CipherSpec cipherSpecTwofish128 = CipherSpecs.getCipherSpec(CipherSpecs.TWOFISH_128_GCM); SaltedSecretKey writeSecretKey1Aes128 = cipherSession.getWriteSecretKey(cipherSpecAes128); SaltedSecretKey writeSecretKey2Aes128 = cipherSession.getWriteSecretKey(cipherSpecAes128); SaltedSecretKey writeSecretKey3Aes128 = cipherSession.getWriteSecretKey(cipherSpecAes128); SaltedSecretKey writeSecretKey1Twofish128 = cipherSession.getWriteSecretKey(cipherSpecTwofish128); SaltedSecretKey writeSecretKey2Twofish128 = cipherSession.getWriteSecretKey(cipherSpecTwofish128); SaltedSecretKey writeSecretKey3Twofish128 = cipherSession.getWriteSecretKey(cipherSpecTwofish128); assertEquals(writeSecretKey1Aes128, writeSecretKey2Aes128); assertNotSame(writeSecretKey1Aes128, writeSecretKey3Aes128); assertEquals(writeSecretKey1Twofish128, writeSecretKey2Twofish128); assertNotSame(writeSecretKey1Twofish128, writeSecretKey3Twofish128); assertNotSame(writeSecretKey1Aes128, writeSecretKey1Twofish128); }