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@kennydude
Created July 14, 2012 14:31
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Encrypt from Java and decrypt on Node.js
// Encrypt where jo is input, and query is output and ENCRPYTION_KEy is key
byte[] input = jo.toString().getBytes("utf-8");
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] thedigest = md.digest(ENCRYPTION_KEY.getBytes("UTF-8"));
SecretKeySpec skc = new SecretKeySpec(thedigest, "AES/ECB/PKCS5Padding");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skc);
byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
ctLength += cipher.doFinal(cipherText, ctLength);
String query = Base64.encodeToString(cipherText, Base64.DEFAULT);
var decipher = crypto.createDecipher('aes-128-ecb', encryption_key);
chunks = []
chunks.push( decipher.update( new Buffer(fullBuffer, "base64").toString("binary")) );
chunks.push( decipher.final('binary') );
var txt = chunks.join("");
txt = new Buffer(txt, "binary").toString("utf-8");
// where encryption_key = key, fullBuffer is the input and txt is output
@sandrapavankumar
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I have an error saying to create a class ENCRYPTION_KEY, please help here.
byte[] thedigest = md.digest(ENCRYPTION_KEY.getBytes("UTF-8"));
And Base64.DEFAULTis not recognizing if anyone got this work please help
String query = Base64.encodeToString(cipherText, Base64.DEFAULT);

ENCRYPTION_KEY is a constant, not a class. You can tell by the fact it used .getBytes(..), a method found on a String object.

If I remember, this works against Android at the time (a long time ago now). So this could have changed (you're following 7 year old code! Surely there's a StackOverflow answer that's newer!)

Thanks Kenny Its working good, for decryption I have an error at chunks.push(decipher.final('binary'));
internal/crypto/cipher.js:164
const ret = this._handle.final();
^

Error: error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length
at Decipher.final (internal/crypto/cipher.js:164:28)

Any suggestions please.

@ssuriyayuvan
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@ricky07 try this

var encrypt = function(data, key) {
var cipher = crypto.createCipher('aes-128-ecb', key);
return cipher.update(data, 'utf8', 'base64') + cipher.final('base64');
};

var decrypt = function(data, key) {
var decipher = crypto.createDecipher('aes-128-ecb', key);
return decipher.update(data, 'base64', 'utf8') + decipher.final('utf8');
};

createCipher is now deprecated.

@sarithakaredla
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    byte[] ivWrap = {0, 2, 4, 6, 2, 9, 5, 1, 4, 1, 5, 9, 2, 7, 1, 0};
    ivWrapSpec = new IvParameterSpec(ivWrap);
            byte[] key = (Key).getBytes("UTF-8");

	MessageDigest sha = MessageDigest.getInstance("SHA-256");
	key = sha.digest(key);
	SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");

can some one please give me node js code for above java code

@mubasharmwm
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Any example of encrypting at Node and decrypting at .Net or Java using BouncyCastle??

@codewithshehraz
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Java Encryption Code(https://repl.it/@ShehrazKhan/Encrypt-in-Java-Decrypt-in-Nodejs)

public static String encrypt(String Data, String secret) throws Exception {
        Key key = generateKey(secret);
        Cipher c = Cipher.getInstance(ALGO);
        c.init(Cipher.ENCRYPT_MODE, key);
        byte[] encVal = c.doFinal(Data.getBytes());
        String encryptedValue = Base64.getEncoder().encodeToString(encVal);
        return encryptedValue;
    }

Node Js(https://codesandbox.io/s/decrypt-aes-in-node-encrypted-in-java-vph6w)

var encryptedBase64Key = "aXRzaG91bGRiZTE2Y2hhcg==";
   var parsedBase64Key = CryptoJS.enc.Base64.parse(encryptedBase64Key);
   var encryptedCipherText = "wbsl6Tegfc7mexCHUYPS+dON3BWfgU+tD1nkiHiZ4LyrHlUXlWsfeInWMDaZO39z"; // or encryptedData;
   var decryptedData = CryptoJS.AES.decrypt(
     encryptedCipherText,
     parsedBase64Key,
     {
       mode: CryptoJS.mode.ECB,
       padding: CryptoJS.pad.Pkcs7
     }
   );
   // console.log( “DecryptedData = “ + decryptedData );
   // this is the decrypted data as a string
   var decryptedText = decryptedData.toString(CryptoJS.enc.Utf8);
   setDecryptedCipherText(decryptedText);
   console.log("DecryptedText = " + decryptedText);

@farhan-ct
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I've this error

Error: error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length

@monossido use this one instead

var decipher = crypto.createDecipher('aes-128-ecb', key); return decipher.update(encrypted, 'base64', 'utf8') + decipher. Final('utf8');

I am getting this error

Error: error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt

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