/**
* 私钥加密
*
* @param data 源数据
* @param privateKey 私钥(BASE64编码)
* @return
* @throws Exception
*/
public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception {
byte[] keyBytes = Base64.decode(privateKey);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, privateK);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = out.toByteArray();
out.close();
return encryptedData;
}
private void testAlgorithm(
String name, byte[] keyBytes, byte[] iv, byte[] plainText, byte[] cipherText)
throws Exception {
SecretKey key = new SecretKeySpec(keyBytes, name);
Cipher in = Cipher.getInstance(name, "BC");
Cipher out = Cipher.getInstance(name, "BC");
if (iv != null) {
in.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv));
out.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
} else {
in.init(Cipher.ENCRYPT_MODE, key);
out.init(Cipher.DECRYPT_MODE, key);
}
byte[] enc = in.doFinal(plainText);
if (!areEqual(enc, cipherText)) {
fail(name + ": cipher text doesn't match");
}
byte[] dec = out.doFinal(enc);
if (!areEqual(dec, plainText)) {
fail(name + ": plain text doesn't match");
}
}
public byte[] new_decrypt_cn(E_CODE paramE_CODE, byte[] paramArrayOfByte)
throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException,
InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
byte[] localObject = null;
if (paramE_CODE == E_CODE.RSA) {
if (rsa_key.length() > 2) {
Cipher localCipher;
byte[] arrayOfByte = new byte[0];
// PublicKey localPublicKey = KeyFactory.getInstance("RSA").generatePublic(new
// X509EncodedKeySpec(Base64.decodeBase64(rsa_key)));
PublicKey localPublicKey =
KeyFactory.getInstance("RSA")
.generatePublic(new X509EncodedKeySpec(Base64.decode(rsa_key, Base64.DEFAULT)));
System.out.println("key length-" + (Base64.decode(rsa_key, Base64.DEFAULT)).length);
System.out.println("data length-" + paramArrayOfByte.length);
localCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
localCipher.init(Cipher.DECRYPT_MODE, localPublicKey);
// localCipher.init(Cipher.ENCRYPT_MODE, localPublicKey);
arrayOfByte = localCipher.doFinal(paramArrayOfByte);
// int oldLength;
// for (int i = 0; i < paramArrayOfByte.length; i += 8) {
// byte[] temp = localCipher.doFinal(paramArrayOfByte, i, i + 8);
// oldLength = arrayOfByte.length;
// arrayOfByte = Arrays.copyOf(arrayOfByte, temp.length+arrayOfByte.length);
// System.arraycopy(temp, 0, arrayOfByte, oldLength, temp.length);
// }
// arrayOfByte = paramArrayOfByte;
return arrayOfByte;
}
} else if (paramE_CODE == E_CODE.RSA_EP) {
if (rsa_ep_key.length() >= 2) {
// PrivateKey localPrivateKey = KeyFactory.getInstance("RSA").generatePrivate(new
// PKCS8EncodedKeySpec(Base64.decodeBase64(rsa_ep_key)));
PrivateKey localPrivateKey =
KeyFactory.getInstance("RSA")
.generatePrivate(
new PKCS8EncodedKeySpec(Base64.decode(rsa_ep_key, Base64.DEFAULT)));
Cipher localCipher2 = Cipher.getInstance("RSA/ECB/PKCS1Padding");
localCipher2.init(2, localPrivateKey);
localObject = localCipher2.doFinal(paramArrayOfByte);
}
} else if (paramE_CODE == E_CODE.AES) {
// SecretKeySpec localSecretKeySpec = new
// SecretKeySpec(Base64.decodeBase64(aes_key.getBytes()), "AES");
// byte[] arrayOfByte1 = Base64.decodeBase64(paramArrayOfByte);
SecretKeySpec localSecretKeySpec =
new SecretKeySpec(Base64.decode(aes_key.getBytes(), Base64.DEFAULT), "AES");
byte[] arrayOfByte1 = Base64.decode(paramArrayOfByte, Base64.DEFAULT);
Cipher localCipher1 = Cipher.getInstance("AES/ECB/PKCS5Padding");
localCipher1.init(Cipher.DECRYPT_MODE, localSecretKeySpec);
byte[] arrayOfByte2 = localCipher1.doFinal(arrayOfByte1);
localObject = arrayOfByte2;
}
return localObject;
}
private void validateKeys(PublicKey pubKey, PrivateKey privKey) {
if (pubKey.getAlgorithm() != privKey.getAlgorithm())
throw new IllegalArgumentException("Public and private key have different algorithms");
// No encryption for DSA
if (pubKey.getAlgorithm() != "RSA") return;
try {
String data = "ENCRYPT_DATA";
SecureRandom random = new SecureRandom();
Cipher cipher = Cipher.getInstance(pubKey.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, privKey, random);
byte[] encryptedData = cipher.doFinal(data.getBytes());
cipher.init(Cipher.DECRYPT_MODE, pubKey, random);
String decreptedData = new String(cipher.doFinal(encryptedData));
if (!decreptedData.equals(data)) throw new IllegalArgumentException("Bad public-private key");
} catch (BadPaddingException e) {
throw new IllegalArgumentException("Bad public-private key", e);
} catch (IllegalBlockSizeException e) {
throw new IllegalArgumentException("Bad public-private key", e);
} catch (NoSuchPaddingException e) {
throw new IllegalArgumentException("Bad public-private key", e);
} catch (InvalidKeyException e) {
throw new IllegalArgumentException("Invalid public-private key", e);
} catch (NoSuchAlgorithmException e) {
throw new IllegalArgumentException("Invalid algorithm for public-private key", e);
}
}
public byte[] encrypt(byte[] data)
throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IOException,
InvalidKeySpecException, IllegalBlockSizeException, BadPaddingException,
InvalidAlgorithmParameterException {
Cipher cipher = getCipherInstance();
if (JCryptoHelper.isNecessaryIvBytes(this.jcrypto.getAlgorithm())) {
IvParameterSpec ivParameterSpec = new IvParameterSpec(JCryptoHelper.DEFAULT_IV_BYTES);
cipher.init(
Cipher.ENCRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()),
ivParameterSpec);
} else {
cipher.init(
Cipher.ENCRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()));
}
if (jcrypto.isApplyBase64()) {
// sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
// return encoder.encode(cipher.doFinal(data)).getBytes();
return Base64.encodeBase64(cipher.doFinal(data));
} else {
return cipher.doFinal(data);
}
}
private static void bcDES() throws Exception {
Security.addProvider(new BouncyCastleProvider());
// Key convert
DESKeySpec desKeySpec = new DESKeySpec(bytesKey);
SecretKeyFactory factory = SecretKeyFactory.getInstance("DES", "BC");
SecretKey desKey = factory.generateSecret(desKeySpec);
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, desKey);
System.out.println("BC" + cipher.getProvider());
byte[] result = cipher.doFinal("ABC".getBytes());
String hexResult = Hex.encodeHexString(result);
System.out.println(hexResult);
cipher.init(Cipher.DECRYPT_MODE, desKey);
result =
cipher.doFinal(
Hex.decodeHex(hexResult.toCharArray())
// result
);
System.out.println(new String(result));
}
private void oidTest() {
String[] oids = {
CryptoProObjectIdentifiers.gostR28147_gcfb.getId(),
};
String[] names = {"GOST28147/GCFB/NoPadding"};
try {
byte[] data = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
IvParameterSpec ivSpec = new IvParameterSpec(new byte[8]);
for (int i = 0; i != oids.length; i++) {
Cipher c1 = Cipher.getInstance(oids[i], "BC");
Cipher c2 = Cipher.getInstance(names[i], "BC");
KeyGenerator kg = KeyGenerator.getInstance(oids[i], "BC");
SecretKey k = kg.generateKey();
c1.init(Cipher.ENCRYPT_MODE, k, ivSpec);
c2.init(Cipher.DECRYPT_MODE, k, ivSpec);
byte[] result = c2.doFinal(c1.doFinal(data));
if (!areEqual(data, result)) {
fail("failed OID test");
}
}
} catch (Exception ex) {
fail("failed exception " + ex.toString(), ex);
}
}
private static void testEncryptDecryptLong(
Cipher c, Cipher d, String string, long key, long value)
throws ShortBufferException, IllegalBlockSizeException, BadPaddingException {
byte[] data = new byte[3 + 8 + 8];
byte[] output = new byte[c.getOutputSize(data.length)];
byte[] result = new byte[3 + 8 + 8];
byte[] salt = string.getBytes();
System.arraycopy(salt, 0, data, 0, salt.length);
longToByteArray2(key, data, 3);
longToByteArray2(value, data, 11);
c.doFinal(data, 0, data.length, output);
d.doFinal(output, 0, output.length, result);
System.out.println("in: " + toHex(data));
System.out.println("enc: " + toHex(output));
System.out.println("dec: " + toHex(result));
for (int i = 0; i < data.length; i++) {
if (data[i] != result[i]) throw new IllegalStateException("darn gosh");
}
}
private static byte[] gcmEncrypt(byte[] key, byte[] plainText, byte[] aad, byte[] iv) {
byte[] cipherText = new byte[plainText.length + 16];
try {
SecretKeySpec keySpec = new SecretKeySpec(key, ALGORITHM);
GCMParameterSpec gcmSpec = new GCMParameterSpec(GCM_TAG_LENGTH * 8, iv);
Cipher cipher = Cipher.getInstance(ALGORITHM + "/" + MODE + "/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, keySpec, gcmSpec);
if (aad != null && aad.length != 0) {
cipher.updateAAD(aad);
}
// if has more than one blocks, test cipher.update
if (plainText.length > 16) {
cipher.update(plainText, 0, 16, cipherText, 0);
cipher.doFinal(plainText, 16, plainText.length - 16, cipherText, 16);
} else {
// doFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
cipher.doFinal(plainText, 0, plainText.length, cipherText, 0);
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
return cipherText;
}
void run() throws Exception {
Cipher cipher = Cipher.getInstance("RC2/ECB/NOPADDING", "SunJCE");
SecretKey keySpec = new SecretKeySpec(key, "RC2");
RC2ParameterSpec rc2Spec = new RC2ParameterSpec(effectiveKeySize);
cipher.init(Cipher.ENCRYPT_MODE, keySpec, rc2Spec);
byte[] enc = cipher.doFinal(plaintext);
if (Arrays.equals(ciphertext, enc) == false) {
System.out.println("RC2AlgorithmParameters Cipher test " + "encryption failed:");
System.out.println("plaintext: " + RC2AlgorithmParameters.toString(plaintext));
System.out.println("ciphertext: " + RC2AlgorithmParameters.toString(ciphertext));
System.out.println("encrypted: " + RC2AlgorithmParameters.toString(enc));
System.out.println("key: " + RC2AlgorithmParameters.toString(key));
System.out.println("effective key length: " + effectiveKeySize);
throw new Exception("RC2AlgorithmParameters Cipher test " + "encryption failed");
}
enc = cipher.doFinal(plaintext);
if (Arrays.equals(ciphertext, enc) == false) {
throw new Exception("Re-encryption test failed");
}
cipher.init(Cipher.DECRYPT_MODE, keySpec, rc2Spec);
byte[] dec = cipher.doFinal(ciphertext);
if (Arrays.equals(plaintext, dec) == false) {
System.out.println("RC2AlgorithmParameters Cipher test " + "decryption failed:");
System.out.println("plaintext: " + RC2AlgorithmParameters.toString(plaintext));
System.out.println("ciphertext: " + RC2AlgorithmParameters.toString(ciphertext));
System.out.println("decrypted: " + RC2AlgorithmParameters.toString(dec));
System.out.println("key: " + RC2AlgorithmParameters.toString(key));
System.out.println("effective key length: " + effectiveKeySize);
throw new Exception("RC2AlgorithmParameters Cipher test " + "decryption failed");
}
System.out.println("passed");
}
public static void main(String[] args) throws Exception {
byte[] input = new byte[] {(byte) 0xbe, (byte) 0xef};
Cipher cipher = Cipher.getInstance("ElGamal/None/NoPadding", "BC");
SecureRandom random = Utils.createFixedRandom();
// create the keys
KeyPairGenerator generator = KeyPairGenerator.getInstance("ElGamal", "BC");
generator.initialize(256, random);
KeyPair pair = generator.generateKeyPair();
Key pubKey = pair.getPublic();
Key privKey = pair.getPrivate();
System.out.println("input : " + Utils.toHex(input));
// encryption step
cipher.init(Cipher.ENCRYPT_MODE, pubKey, random);
byte[] cipherText = cipher.doFinal(input);
System.out.println("cipher: " + Utils.toHex(cipherText));
// decryption step
cipher.init(Cipher.DECRYPT_MODE, privKey);
byte[] plainText = cipher.doFinal(cipherText);
System.out.println("plain : " + Utils.toHex(plainText));
}
public static Message encrypt(PublicKey pubKey, byte[] input) throws CryptoException {
Message message = new Message();
message.pubKey = pubKey.getEncoded();
KeyGenerator keyGen;
try {
keyGen = KeyGenerator.getInstance("AES");
} catch (NoSuchAlgorithmException e) {
throw new CryptoException(e);
}
keyGen.init(128);
SecretKey secretKey = keyGen.generateKey();
try {
Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
rsaCipher.init(Cipher.ENCRYPT_MODE, pubKey);
message.sessionKey = rsaCipher.doFinal(secretKey.getEncoded());
Cipher aesCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
aesCipher.init(Cipher.ENCRYPT_MODE, secretKey);
AlgorithmParameters params = aesCipher.getParameters();
message.iv = params.getParameterSpec(IvParameterSpec.class).getIV();
message.ciphertext = aesCipher.doFinal(input);
} catch (NoSuchAlgorithmException
| NoSuchPaddingException
| InvalidKeyException
| IllegalBlockSizeException
| BadPaddingException
| InvalidParameterSpecException e) {
throw new CryptoException(e);
}
return message;
}
public static byte[] encryptDataBytes(PublicKey publicKey, byte[] data) {
try {
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", new BouncyCastleProvider());
cipher.init(1, publicKey);
int blockSize = cipher.getBlockSize();
int outputSize = cipher.getOutputSize(data.length);
int leavedSize = data.length % blockSize;
int blocksSize = leavedSize != 0 ? data.length / blockSize + 1 : data.length / blockSize;
byte[] raw = new byte[outputSize * blocksSize];
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize)
cipher.doFinal(data, i * blockSize, blockSize, raw, i * outputSize);
else {
cipher.doFinal(data, i * blockSize, data.length - i * blockSize, raw, i * outputSize);
}
i++;
}
return raw;
} catch (Exception e) {
logger.error(e.getMessage());
return null;
}
}
/**
* 公钥解密
*
* @param encryptedData 已加密数据
* @param publicKey 公钥(BASE64编码)
* @return
* @throws Exception
*/
public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey) throws Exception {
byte[] keyBytes = Base64Utils.decode(publicKey);
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
Key publicK = keyFactory.generatePublic(x509KeySpec);
Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
cipher.init(Cipher.DECRYPT_MODE, publicK);
int inputLen = encryptedData.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] decryptedData = out.toByteArray();
out.close();
return decryptedData;
}
public static byte[] decrypt(PrivateKey privKey, Message message) throws CryptoException {
try {
Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
rsaCipher.init(Cipher.DECRYPT_MODE, privKey);
byte[] secretKeyBytes = rsaCipher.doFinal(message.sessionKey);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("AES");
KeySpec ks = new SecretKeySpec(secretKeyBytes, "AES");
SecretKey secretKey = keyFactory.generateSecret(ks);
Cipher aesCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
aesCipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(message.iv));
byte[] messageBytes = aesCipher.doFinal(message.ciphertext);
return messageBytes;
} catch (NoSuchAlgorithmException
| NoSuchPaddingException
| InvalidKeyException
| IllegalBlockSizeException
| BadPaddingException
| InvalidKeySpecException
| InvalidAlgorithmParameterException e) {
throw new CryptoException(e);
}
}
public void doTest(String testname, KeyPairGenerator g, String cipher, IESParameterSpec p)
throws Exception {
byte[] message = Hex.decode("0102030405060708090a0b0c0d0e0f10111213141516");
byte[] out1, out2;
// Generate static key pair
KeyPair KeyPair = g.generateKeyPair();
ECPublicKey Pub = (ECPublicKey) KeyPair.getPublic();
ECPrivateKey Priv = (ECPrivateKey) KeyPair.getPrivate();
Cipher c1 = Cipher.getInstance(cipher);
Cipher c2 = Cipher.getInstance(cipher);
// Testing with null parameters and DHAES mode off
c1.init(Cipher.ENCRYPT_MODE, Pub, new SecureRandom());
c2.init(Cipher.DECRYPT_MODE, Priv, new SecureRandom());
out1 = c1.doFinal(message, 0, message.length);
out2 = c2.doFinal(out1, 0, out1.length);
if (!areEqual(out2, message))
fail(testname + " test failed with null parameters, DHAES mode false.");
// Testing with given parameters and DHAES mode off
c1.init(Cipher.ENCRYPT_MODE, Pub, p, new SecureRandom());
c2.init(Cipher.DECRYPT_MODE, Priv, p, new SecureRandom());
out1 = c1.doFinal(message, 0, message.length);
out2 = c2.doFinal(out1, 0, out1.length);
if (!areEqual(out2, message))
fail(testname + " test failed with non-null parameters, DHAES mode false.");
// TODO: DHAES mode is not currently implemented, perhaps it shouldn't be...
// c1 = Cipher.getInstance(cipher + "/DHAES/PKCS7Padding","BC");
// c2 = Cipher.getInstance(cipher + "/DHAES/PKCS7Padding","BC");
//
// // Testing with null parameters and DHAES mode on
// c1.init(Cipher.ENCRYPT_MODE, Pub, new SecureRandom());
// c2.init(Cipher.DECRYPT_MODE, Priv, new SecureRandom());
//
// out1 = c1.doFinal(message, 0, message.length);
// out2 = c2.doFinal(out1, 0, out1.length);
// if (!areEqual(out2, message))
// fail(testname + " test failed with null parameters, DHAES mode true.");
//
// c1 = Cipher.getInstance(cipher + "/DHAES/PKCS7Padding");
// c2 = Cipher.getInstance(cipher + "/DHAES/PKCS7Padding");
//
// // Testing with given parameters and DHAES mode on
// c1.init(Cipher.ENCRYPT_MODE, Pub, p, new SecureRandom());
// c2.init(Cipher.DECRYPT_MODE, Priv, p, new SecureRandom());
//
// out1 = c1.doFinal(message, 0, message.length);
// out2 = c2.doFinal(out1, 0, out1.length);
// if (!areEqual(out2, message))
// fail(testname + " test failed with non-null parameters, DHAES mode true.");
}
public static void crypt(String inFilename, String outFilename, int mode) {
InputStream in = null;
OutputStream out = null;
ObjectInputStream keyin = null;
try {
in = new FileInputStream(inFilename);
out = new FileOutputStream(outFilename);
keyin = new ObjectInputStream(new FileInputStream(keyFilename));
// 获取到密钥
Key key = (Key) keyin.readObject();
// 使用AES算法获取密码对象
Cipher cipher = Cipher.getInstance("AES");
// 通过设置模式和密钥来初始化
cipher.init(mode, key);
// 获取密码块大小，16
int blockSize = cipher.getBlockSize();
// 该密码块对应的输出缓存区大小，用于存放密码对象输出的数据块
int outputSize = cipher.getOutputSize(blockSize);
byte[] inBytes = new byte[blockSize];
byte[] outBytes = new byte[outputSize];
int length = 0;
boolean more = true;
while (more) {
length = in.read(inBytes);
// 如果能读到blockSize大小的块
if (length == blockSize) {
// 数据块存入outBytes
int outLength = cipher.update(inBytes, 0, blockSize, outBytes);
out.write(outBytes, 0, outLength);
} else {
more = false;
}
}
// 如果最后一个输入数据块的字节数小于blockSize，剩下的字节将会自动填充
if (length > 0) {
outBytes = cipher.doFinal(inBytes, 0, length);
} else {
outBytes = cipher.doFinal();
}
out.write(outBytes);
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (GeneralSecurityException e) {
e.printStackTrace();
} finally {
Closer.close(in);
Closer.close(out);
Closer.close(keyin);
}
}
public boolean shareAESkey() {
try {
Envelope message = null, e = null;
// Generate AES key
KeyGenerator keyGen = KeyGenerator.getInstance("AES");
AESkey = keyGen.generateKey();
keyGen = KeyGenerator.getInstance("HmacSHA1");
HMACkey = keyGen.generateKey();
byte[] keyBytes = AESkey.getEncoded();
byte[] hashBytes = HMACkey.getEncoded();
System.out.println("AES key generated");
System.out.println("HMAC key generated");
System.out.println("Begin Encryption...");
// Encrypt message w/ provided public key
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
byte[] cipherBytes = cipher.doFinal(keyBytes);
byte[] cipherBytes1 = cipher.doFinal(hashBytes);
System.out.println("Encryption Complete");
message = new Envelope("SKEY");
message.addObject(cipherBytes); // Add AESkey to message
message.addObject(cipherBytes1);
message.addObject(nonce);
nonce++;
byte[] messageBytes = Envelope.toByteArray(message);
output.writeObject(messageBytes);
byte[] inCipherBytes = (byte[]) input.readObject();
// Decrypt response
cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, AESkey);
byte[] responseBytes = cipher.doFinal(inCipherBytes);
Envelope response = Envelope.getEnvelopefromBytes(responseBytes);
// If server indicates success, return the member list
if (response.getMessage().equals("OK")
&& (Integer) response.getObjContents().get(0) == nonce) {
return true;
} else {
return false;
}
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
e.printStackTrace(System.err);
return false;
}
}
public static void main(String[] args) throws Exception {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
// get user inputted key
byte[] userkey = null;
do {
System.out.println("Please enter a 8 character string to generate a Secret Key");
userkey = (in.readLine()).getBytes();
} while (userkey.length != 8);
// create Key Generator instance and generate a secret key
KeyGenerator kgen = KeyGenerator.getInstance("DES");
SecretKey skey = kgen.generateKey();
byte[] key = userkey;
// Create a Secret Key based on characters entered by the user
SecretKeySpec skeyspec = new SecretKeySpec(key, "DES");
// Create a cipher to encrypt with
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skeyspec);
// Get message
System.out.println("Please enter a string to encrypt");
byte[] userstring = null;
userstring = (in.readLine()).getBytes();
// Encrypt message with cipher
byte[] encrypted = cipher.doFinal(userstring);
String enc_string = new String(encrypted);
System.out.println("The String is encrypted as " + enc_string);
byte[] userdecrypt = null;
byte[] decrypted = null;
// Get user decrypt key
do {
System.out.println("Please enter the 8 character key to decrypt the message");
userdecrypt = (in.readLine()).getBytes();
} while (userdecrypt.length != 8);
// Reinitialize Secret Key and Cipher
key = userdecrypt;
SecretKeySpec decryptkey = new SecretKeySpec(key, "DES");
cipher.init(Cipher.DECRYPT_MODE, decryptkey);
// Decrypt message
decrypted = cipher.doFinal(encrypted);
if ((new String(decrypted)).equals(new String(userstring)))
System.out.println("\nMessage decrypted as: " + (new String(decrypted)));
else System.out.println("\nMessage was not decrypted");
}
private void oaepCompatibilityTest(String digest, PrivateKey privKey, PublicKey pubKey)
throws Exception {
if (Security.getProvider("SunJCE") == null || Security.getProvider("SunRsaSign") == null) {
return;
}
KeyFactory fact = KeyFactory.getInstance("RSA", "SunRsaSign");
PrivateKey priv2048Key = fact.generatePrivate(priv2048KeySpec);
PublicKey pub2048Key = fact.generatePublic(pub2048KeySpec);
byte[] data = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
Cipher sCipher;
try {
sCipher = Cipher.getInstance("RSA/ECB/OAEPWith" + digest + "AndMGF1Padding", "SunJCE");
} catch (NoSuchAlgorithmException e) {
return;
} catch (NoSuchPaddingException e) {
return;
}
sCipher.init(Cipher.ENCRYPT_MODE, pub2048Key);
byte[] enctext = sCipher.doFinal(data);
Cipher bcCipher = Cipher.getInstance("RSA/ECB/OAEPWith" + digest + "AndMGF1Padding", "BC");
bcCipher.init(
Cipher.DECRYPT_MODE,
privKey,
new OAEPParameterSpec(digest, "MGF1", MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
byte[] plaintext = bcCipher.doFinal(enctext);
if (!Arrays.areEqual(plaintext, data)) {
fail("data did not decrypt first time");
}
bcCipher.init(
Cipher.ENCRYPT_MODE,
pubKey,
new OAEPParameterSpec(digest, "MGF1", MGF1ParameterSpec.SHA1, PSource.PSpecified.DEFAULT));
enctext = bcCipher.doFinal(data);
sCipher.init(Cipher.DECRYPT_MODE, priv2048Key);
plaintext = sCipher.doFinal(enctext);
if (!Arrays.areEqual(plaintext, data)) {
fail("data did not decrypt second time");
}
}
public void testModule() throws Exception {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); // Add
// Create the secret/symmetric key
KeyGenerator kgen = KeyGenerator.getInstance("Blowfish");
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "Blowfish");
// Create the cipher for encrypting
Cipher cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
// Encrypt the data
byte[] encrypted = cipher.doFinal(plain);
// Save the encrypted data
FileOutputStream fos = new FileOutputStream(datafile);
fos.write(encrypted);
fos.close();
// Save the cipher settings
byte[] encodedKeySpec = skeySpec.getEncoded();
FileOutputStream eksos = new FileOutputStream(keyfile);
eksos.write(encodedKeySpec);
eksos.close();
// Read the encrypted data
FileInputStream fis = new FileInputStream(datafile);
byte[] temp = new byte[8192];
int bytesRead = fis.read(temp);
byte[] data = new byte[bytesRead];
System.arraycopy(temp, 0, data, 0, bytesRead);
// Read the cipher settings
FileInputStream eksis = new FileInputStream(keyfile);
bytesRead = eksis.read(temp);
encodedKeySpec = new byte[bytesRead];
System.arraycopy(temp, 0, encodedKeySpec, 0, bytesRead);
// Recreate the secret/symmetric key
skeySpec = new SecretKeySpec(encodedKeySpec, "Blowfish");
// Create the cipher for encrypting
cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
// Decrypt the data
byte[] decrypted = cipher.doFinal(data);
assertTrue(Arrays.equals(decrypted, plain));
}
public static SecretKey getSecret(EncryptionResponse resp, EncryptionRequest request)
throws GeneralSecurityException {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, keys.getPrivate());
byte[] decrypted = cipher.doFinal(resp.getVerifyToken());
if (!Arrays.equals(request.getVerifyToken(), decrypted)) {
throw new IllegalStateException("Key pairs do not match!");
}
cipher.init(Cipher.DECRYPT_MODE, keys.getPrivate());
return new SecretKeySpec(cipher.doFinal(resp.getSharedSecret()), "AES");
}
private byte[] blockCipher(byte[] bytes, int mode, Cipher cipher)
throws IllegalBlockSizeException, BadPaddingException {
// string initialize 2 buffers.
// scrambled will hold intermediate results
byte[] scrambled = new byte[0];
// toReturn will hold the total result
byte[] toReturn = new byte[0];
// if we encrypt we use 100 byte long blocks. Decryption requires 128
// byte long blocks (because of RSA)
int length = (mode == Cipher.ENCRYPT_MODE) ? 100 : 128;
// another buffer. this one will hold the bytes that have to be modified
// in this step
byte[] buffer = new byte[length];
for (int i = 0; i < bytes.length; i++) {
// if we filled our buffer array we have our block ready for de- or
// encryption
if ((i > 0) && (i % length == 0)) {
// execute the operation
scrambled = cipher.doFinal(buffer);
// add the result to our total result.
toReturn = append(toReturn, scrambled);
// here we calculate the length of the next buffer required
int newlength = length;
// if newlength would be longer than remaining bytes in the
// bytes array we shorten it.
if (i + length > bytes.length) {
newlength = bytes.length - i;
}
// clean the buffer array
buffer = new byte[newlength];
}
// copy byte into our buffer.
buffer[i % length] = bytes[i];
}
// this step is needed if we had a trailing buffer. should only happen
// when encrypting.
// example: we encrypt 110 bytes. 100 bytes per run means we "forgot"
// the last 10 bytes. they are in the buffer array
scrambled = cipher.doFinal(buffer);
// final step before we can return the modified data.
toReturn = append(toReturn, scrambled);
return toReturn;
}
private void testGCMGeneric(byte[] K, byte[] N, byte[] A, byte[] P, byte[] C)
throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException,
IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException,
NoSuchProviderException, IOException, InvalidParameterSpecException {
Cipher eax = Cipher.getInstance("AES/GCM/NoPadding", "BC");
SecretKeySpec key = new SecretKeySpec(K, "AES");
// GCMParameterSpec mapped to AEADParameters and overrides default MAC
// size
GCMParameterSpec spec = new GCMParameterSpec(128, N);
eax.init(Cipher.ENCRYPT_MODE, key, spec);
eax.updateAAD(A);
byte[] c = eax.doFinal(P);
if (!areEqual(C, c)) {
fail("JCE encrypt with additional data and GCMParameterSpec failed.");
}
eax = Cipher.getInstance("GCM", "BC");
eax.init(Cipher.DECRYPT_MODE, key, spec);
eax.updateAAD(A);
byte[] p = eax.doFinal(C);
if (!areEqual(P, p)) {
fail("JCE decrypt with additional data and GCMParameterSpec failed.");
}
AlgorithmParameters algParams = eax.getParameters();
byte[] encParams = algParams.getEncoded();
GCMParameters gcmParameters = GCMParameters.getInstance(encParams);
if (!Arrays.areEqual(spec.getIV(), gcmParameters.getNonce())
|| spec.getTLen() != gcmParameters.getIcvLen()) {
fail("parameters mismatch");
}
GCMParameterSpec gcmSpec = algParams.getParameterSpec(GCMParameterSpec.class);
if (!Arrays.areEqual(gcmSpec.getIV(), gcmParameters.getNonce())
|| gcmSpec.getTLen() != gcmParameters.getIcvLen() * 8) {
fail("spec parameters mismatch");
}
if (!Arrays.areEqual(eax.getIV(), gcmParameters.getNonce())) {
fail("iv mismatch");
}
}
@Override
public void requestPurchase(String sku) {
try {
SecureRandom sr;
sr = SecureRandom.getInstance("SHA1PRNG");
String uniqueId = Long.toHexString(sr.nextLong());
JSONObject purchaseRequest = new JSONObject();
purchaseRequest.put("uuid", uniqueId);
purchaseRequest.put("identifier", sku);
purchaseRequest.put("testing", TESTING);
String purchaseRequestJson = purchaseRequest.toString();
byte[] keyBytes = new byte[16];
sr.nextBytes(keyBytes);
SecretKey key = new SecretKeySpec(keyBytes, "AES");
byte[] ivBytes = new byte[16];
sr.nextBytes(ivBytes);
IvParameterSpec iv = new IvParameterSpec(ivBytes);
Cipher cipher;
cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
byte[] payload = cipher.doFinal(purchaseRequestJson.getBytes("UTF-8"));
cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
cipher.init(Cipher.ENCRYPT_MODE, mPublicKey);
byte[] encryptedKey = cipher.doFinal(keyBytes);
Purchasable purchasable =
new Purchasable(
sku,
Base64.encodeToString(encryptedKey, Base64.NO_WRAP),
Base64.encodeToString(ivBytes, Base64.NO_WRAP),
Base64.encodeToString(payload, Base64.NO_WRAP));
// synchronized (mOutstandingPurchaseRequests) {
// mOutstandingPurchaseRequests.put(uniqueId, product);
// }
OuyaFacade.getInstance().requestPurchase(purchasable, this);
} catch (Throwable e) {
e.printStackTrace();
}
}
public static byte[] encryptbytes(
byte[] bytefile, SecretKey secretKey, byte[] nonceBuffer, int offset) {
byte[] byteCipherText = null;
try {
final byte[] plaintext = bytefile;
final byte[] nonce = nonceBuffer;
final byte[] ciphertext = new byte[plaintext.length];
Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding");
final int skip = offset % BLOCK_SIZE;
final IvParameterSpec nonceIV =
calculateIVForOffset(
generateIVFromNonce(nonce, 0, NONCE_SIZE, cipher.getBlockSize()), offset - skip);
cipher.init(Cipher.ENCRYPT_MODE, secretKey, nonceIV);
final byte[] skipBuffer = new byte[skip];
cipher.update(skipBuffer, 0, skip, skipBuffer);
cipher.doFinal(plaintext, 0, plaintext.length, ciphertext);
byteCipherText = ciphertext;
} catch (final GeneralSecurityException e) {
throw new IllegalStateException("Missing basic functionality from Java runtime", e);
}
return byteCipherText;
}
public static byte[] getShared(SecretKey key, PublicKey pubkey)
throws BadPaddingException, IllegalBlockSizeException, InvalidKeyException,
NoSuchAlgorithmException, NoSuchPaddingException {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, pubkey);
return cipher.doFinal(key.getEncoded());
}
public static byte[] encrypt(Key key, byte[] b)
throws BadPaddingException, IllegalBlockSizeException, InvalidKeyException,
NoSuchAlgorithmException, NoSuchPaddingException {
Cipher hasher = Cipher.getInstance("RSA");
hasher.init(Cipher.ENCRYPT_MODE, key);
return hasher.doFinal(b);
}
public String[] receiveTransactionId(byte[] data)
throws RemoteException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException,
IllegalBlockSizeException, BadPaddingException {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
byte[] cipherData = cipher.doFinal(data);
String x = new String(cipherData);
System.out.println(x);
if (x.equals("e3050620f38846eeab342d293f13e043")) {
String val = UUID.randomUUID().toString().replaceAll("-", "");
transactionDetails[0] = val;
System.out.println(transactionDetails[0]);
String bits = "";
Random r = new Random();
for (int l = 0; l < 2048; l++) {
int y = 0;
if (r.nextBoolean()) y = 1;
bits += y;
}
transactionDetails[1] = bits;
System.out.println(transactionDetails[1]);
System.out.println(transactionDetails);
}
return transactionDetails;
}
public void writeSession(HttpServletRequest request, HttpServletResponse response)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException,
BadPaddingException, IllegalBlockSizeException {
SparkHttpRequestWrapper sparkRequest = (SparkHttpRequestWrapper) request;
if (!sparkRequest.sessionAccessed()) return;
CookieSession session = (CookieSession) request.getSession();
// serialize session
byte[] sessionBytes = conf.asByteArray(session);
// encrypt content
final Cipher symmetricalCipher = Cipher.getInstance(symmetricEncryptionAlgorithm);
symmetricalCipher.init(Cipher.ENCRYPT_MODE, this.symmetricEncryptionKey);
byte[] encryptedBytes = symmetricalCipher.doFinal(sessionBytes);
// sign content
byte[] signature = sign(encryptedBytes);
byte[] cookieContent = new byte[encryptedBytes.length + signature.length];
System.arraycopy(encryptedBytes, 0, cookieContent, 0, encryptedBytes.length);
System.arraycopy(
signature, 0, cookieContent, cookieContent.length - signature.length, signature.length);
String base64CookieContent = Base64.getEncoder().encodeToString(cookieContent);
addCookie(base64CookieContent, response);
}