[英]How to implement CryptoJS.AES.encrypt function in Java?
I'm trying to implement following code from crypto-js in java for encryption我正在尝试在java中实现以下来自crypto-js的代码以进行加密
let toEncrypt= "my data";
cryptoJs.AES.encrypt(toEncrypt,"apasswordblabla").toString();
here is my implementation (AES/CBC/PKCS7Padding):这是我的实现(AES/CBC/PKCS7Padding):
public String encrypt(Map<String,Object> param){
try {
String toEncrypt= objectMapper.writeValueAsString(param);
MessageDigest md5 = MessageDigest.getInstance("MD5");
byte[] saltData = Arrays.copyOfRange(stringToEncrypt.getBytes(StandardCharsets.UTF_8), 8, 16);
final byte[][] keyAndIV = generateKeyAndIV(32, 16, 1, saltData, "apasswordblabla".getBytes(StandardCharsets.UTF_8), md5);
SecretKeySpec skeySpec = new SecretKeySpec(keyAndIV[0], "AES");
IvParameterSpec iv = new IvParameterSpec(keyAndIV[1]);
Cipher cipher;
cipher = Cipher.getInstance("AES/CBC/PKCS7Padding",BouncyCastleProvider.PROVIDER_NAME);
cipher.init(Cipher.ENCRYPT_MODE, skeySpec,iv);
byte[] base64Encoded = Base64.getEncoder().encode(cipher.doFinal(toEncrypt.getBytes(StandardCharsets.UTF_8)));
return new String(base64Encoded);
} catch (NoSuchAlgorithmException | NoSuchPaddingException | IllegalBlockSizeException
| BadPaddingException | InvalidKeyException
| JsonProcessingException | NoSuchProviderException | InvalidAlgorithmParameterException e) {
e.printStackTrace();
}
}
Implementation of generateIV(int ,int ,int ,byte[] , byte[], MessageDigest): generateIV(int ,int ,int ,byte[] , byte[], MessageDigest) 的实现:
public static byte[][] generateKeyAndIV(int keyLength, int ivLength, int iterations, byte[] salt, byte[] password, MessageDigest md) {
int digestLength = md.getDigestLength();
int requiredLength = (keyLength + ivLength + digestLength - 1) / digestLength * digestLength;
byte[] generatedData = new byte[requiredLength];
int generatedLength = 0;
try {
md.reset();
// Repeat process until sufficient data has been generated
while (generatedLength < keyLength + ivLength) {
// Digest data (last digest if available, password data, salt if available)
if (generatedLength > 0)
md.update(generatedData, generatedLength - digestLength, digestLength);
md.update(password);
if (salt != null)
md.update(salt, 0, 8);
md.digest(generatedData, generatedLength, digestLength);
// additional rounds
for (int i = 1; i < iterations; i++) {
md.update(generatedData, generatedLength, digestLength);
md.digest(generatedData, generatedLength, digestLength);
}
generatedLength += digestLength;
}
// Copy key and IV into separate byte arrays
byte[][] result = new byte[2][];
result[0] = Arrays.copyOfRange(generatedData, 0, keyLength);
if (ivLength > 0)
result[1] = Arrays.copyOfRange(generatedData, keyLength, keyLength + ivLength);
return result;
} catch (DigestException e) {
throw new RuntimeException(e);
} finally {
// Clean out temporary data
Arrays.fill(generatedData, (byte)0);
}
}
and then I try to decrypt it Here using然后我尝试在这里使用解密它
let toDecrypt="[MY ENCRYPTED DATA IN BASE64]"
let decrypted = cryptoJs.AES.decrypt(toDecrypt, "apasswordblabla").toString(cryptoJs.enc.Utf8).toString();
console.log(decrypted);
And its always fail to decrypt, with error "Malformed utf-8 data" .而且它总是无法解密,并出现错误"Malformed utf-8 data" 。 Hence, my java implementation is wrong
因此,我的 java 实现是错误的
What did I got wrong here?我在这里做错了什么? or if there is any ready library to solve this issues please suggest
或者如果有任何现成的库来解决这个问题,请建议
The format used by OpenSSL and CryptoJS turns out to be base64("Salted__" + <salt 8 bytes> + <encrypted data>)
OpenSSL 和 CryptoJS 使用的格式原来是
base64("Salted__" + <salt 8 bytes> + <encrypted data>)
Here's the code that produces result in such format (reusing generateKeyAndIV
method from above without any modifications):这是以这种格式产生结果的代码(从上面重用
generateKeyAndIV
方法,无需任何修改):
public static void main(String args[]) {
Security.addProvider(new BouncyCastleProvider());
System.out.println(encrypt());
}
public static String encrypt() {
try {
String stringToEncrypt = "Hello world 12345";
String password = "apasswordblabla";
SecureRandom sr = new SecureRandom();
byte[] salt = new byte[8];
sr.nextBytes(salt);
final byte[][] keyAndIV = generateKeyAndIV(32, 16, 1, salt, password.getBytes(StandardCharsets.UTF_8),
MessageDigest.getInstance("MD5"));
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", BouncyCastleProvider.PROVIDER_NAME);
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyAndIV[0], "AES"), new IvParameterSpec(keyAndIV[1]));
byte[] encryptedData = cipher.doFinal(stringToEncrypt.getBytes(StandardCharsets.UTF_8));
byte[] prefixAndSaltAndEncryptedData = new byte[16 + encryptedData.length];
// Copy prefix (0-th to 7-th bytes)
System.arraycopy("Salted__".getBytes(StandardCharsets.UTF_8), 0, prefixAndSaltAndEncryptedData, 0, 8);
// Copy salt (8-th to 15-th bytes)
System.arraycopy(salt, 0, prefixAndSaltAndEncryptedData, 8, 8);
// Copy encrypted data (16-th byte and onwards)
System.arraycopy(encryptedData, 0, prefixAndSaltAndEncryptedData, 16, encryptedData.length);
return Base64.getEncoder().encodeToString(prefixAndSaltAndEncryptedData);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
Example result produced is: U2FsdGVkX1/O8jV2bfcM/06DM106oLAzdf7z66/JakGNefts4MftzXquopkxPaDo
产生的示例结果是:
U2FsdGVkX1/O8jV2bfcM/06DM106oLAzdf7z66/JakGNefts4MftzXquopkxPaDo
Decoding in JSFiddle using this code:使用此代码在 JSFiddle 中解码:
console.log(CryptoJS.AES.decrypt("U2FsdGVkX1/O8jV2bfcM/06DM106oLAzdf7z66/JakGNefts4MftzXquopkxPaDo", "apasswordblabla").toString(CryptoJS.enc.Utf8));
Produced desired output in browser console: Hello world 12345
在浏览器控制台中产生所需的输出:
Hello world 12345
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