I have code in java for encryption
public String encrypt() throws Exception {
String data = "Hello World";
String secretKey = "j3u8ue8xmrhsth59";
byte[] keyValue = secretKey.getBytes();
Key key = new SecretKeySpec(keyValue, "AES");
Cipher c = Cipher.getInstance("AES");
c.init(Cipher.ENCRYPT_MODE, key);
byte[] encVal = c.doFinal(StringUtils.getBytesUtf8(data));
String encryptedValue = Base64.encodeBase64String(encVal);
return encryptedValue;
}
It returns same value ( eg5pK6F867tyDhBdfRkJuA== ) as the tool here
I converted the code to Nodejs (crypto)
var crypto = require('crypto')
encrypt(){
var data = "Hello World"
var cipher = crypto.createCipher('aes-128-ecb','j3u8ue8xmrhsth59')
var crypted = cipher.update(data,'utf-8','base64')
crypted += cipher.final('base64')
return crypted;
}
But this is giving a different value ( POixVcNnBs3c8mwM0lcasQ== )
How to get same value from both?
What am I missing?
Thanks to dave now I am getting same result both for Java and Nodejs/JavaScript
var crypto = require('crypto')
encrypt(){
var data = "Hello World"
var iv = new Buffer(0);
const key = 'j3u8ue8xmrhsth59'
var cipher = crypto.createCipheriv('aes-128-ecb',new Buffer(key),new Buffer(iv))
var crypted = cipher.update(data,'utf-8','base64')
crypted += cipher.final('base64')
return crypted;
}
Related
I trying to implement this same code to encrypt on c# but always i get some different encrypted code :
This is my Java class :
public class AES256 {
private static final String SECRET_KEY = "my_super_secret_key_ho_ho_ho";
private static final String SALT = "ssshhhhhhhhhhh!!!!";
public static String encrypt(String strToEncrypt) {
try {
byte[] iv = "1234567891234567".getBytes("UTF-8");
IvParameterSpec ivspec = new IvParameterSpec(iv);
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
KeySpec spec = new PBEKeySpec(SECRET_KEY.toCharArray(), SALT.getBytes(), 65536, 256);
SecretKey tmp = factory.generateSecret(spec);
SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);
return Base64.getEncoder()
.encodeToString(cipher.doFinal(strToEncrypt.getBytes(StandardCharsets.UTF_8)));
} catch (Exception e) {
System.out.println("Error while encrypting: " + e.toString());
}
return null;
}
}
How can i implement the same on c#? i usig this as a model -> c# AES Encrypt but the result is diffetent even using the same secret , salt ,interaction hash count
This what i have on c# :
var passPhrase = "my_super_secret_key_ho_ho_ho";
// Initialization Vector (16 bit length)
var iv = "1234567891234567";
// Encrypt & Decrypt (with advanced settings)
var opts = new AESCryptOptions()
{
PasswordHash = AESPasswordHash.SHA1,
PasswordHashIterations = 65536,
PasswordHashSalt = "ssshhhhhhhhhhh!!!!",
PaddingMode = PaddingMode.PKCS7,
MinSaltLength = 4,
MaxSaltLength = 16,
FixedKeySize=256
};
var encryptedText = new AESCrypt(passPhrase, iv, opts).Encrypt(text);
And the encrypt Method, i changed the hash to sha256, the only change made from the implement from gitHub:
PasswordDeriveBytes password = new PasswordDeriveBytes(
passPhrase,
saltValueBytes,
("SHA256"),
Options.PasswordHashIterations);
// Convert key to a byte array adjusting the size from bits to bytes.
keyBytes = password.GetBytes(keySize / 8);
Am able to encrypt and decrypt node and java code individually but when trying to decrypt the node text in java getting Tag mismatch! Am trying to encrypt and decrypt a simple Hello World text here
node js code i have :
const buffer = require('buffer');
const crypto = require('crypto');
// Demo implementation of using `aes-256-gcm` with node.js's `crypto` lib.
const aes256gcm = (key) => {
const ALGO = 'aes-256-gcm';
// encrypt returns base64-encoded ciphertext
const encrypt = (str) => {
// Hint: the `iv` should be unique (but not necessarily random).
// `randomBytes` here are (relatively) slow but convenient for
// demonstration.
const iv = new Buffer(crypto.randomBytes(16), 'utf8');
const cipher = crypto.createCipheriv(ALGO, key, iv);
// Hint: Larger inputs (it's GCM, after all!) should use the stream API
let enc = cipher.update(str, 'utf8', 'base64');
enc += cipher.final('base64');
console.log(enc);
return [enc, iv, cipher.getAuthTag()];
};
// decrypt decodes base64-encoded ciphertext into a utf8-encoded string
const decrypt = (enc, iv, authTag) => {
const decipher = crypto.createDecipheriv(ALGO, key, iv);
decipher.setAuthTag(authTag);
let str = decipher.update(enc, 'base64', 'utf8');
str += decipher.final('utf8');
return str;
};
return {
encrypt,
decrypt,
};
};
const KEY = new Buffer('fTjWnZr4u7x!z%C*F-JaNdRgUkXp2s5v', 'utf8');
const aesCipher = aes256gcm(KEY);
const [encrypted, iv, authTag] = aesCipher.encrypt('Hello World');
const decrypted = aesCipher.decrypt(encrypted, iv, authTag);
console.log(decrypted); // 'hello, world'
And the java code i have :
private final static int GCM_IV_LENGTH = 12;
private final static int GCM_TAG_LENGTH = 16;
private static String decrypt(String encrypted, SecretKey skey) throws Exception {
byte[] decoded = Base64.getDecoder().decode(encrypted);
byte[] iv = Arrays.copyOfRange(decoded, 0, GCM_IV_LENGTH);
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
GCMParameterSpec ivSpec = new GCMParameterSpec(GCM_TAG_LENGTH * Byte.SIZE, iv);
cipher.init(Cipher.DECRYPT_MODE, skey, ivSpec);
byte[] ciphertext = cipher.doFinal(decoded, GCM_IV_LENGTH, decoded.length - GCM_IV_LENGTH);
String result = new String(ciphertext, "UTF8");
return result;
}
The main method of the java execution code is
public static void main(String[] args) throws Exception {
String byte_key="fTjWnZr4u7x!z%C*F-JaNdRgUkXp2s5v";
SecretKey key = new SecretKeySpec(byte_key.getBytes(), "AES");
System.out.println("foo "+ decrypt("1cbKXSnEWixxFi0=", key));
}
I think i am missing something here
I have found a source code at stackoverflow on Rinjndael-256 encryption and decryption written in c#. It is using custom IV appending some extra string. Now I need a decryption method on Java platform. I have found some source code; tried to change and test that. Here is the encryption method on c#:
public static string Encrypt(byte[] text, string key)
{
RijndaelManaged aes = new RijndaelManaged();
aes.KeySize = 256;
aes.BlockSize = 256;
aes.Padding = PaddingMode.None;
aes.Mode = CipherMode.CBC;
aes.Key = Encoding.Default.GetBytes(key);
aes.GenerateIV();
string IV = ("-[--IV-[-" + Encoding.Default.GetString(aes.IV));
ICryptoTransform AESEncrypt = aes.CreateEncryptor(aes.Key, aes.IV);
byte[] buffer = text;
return Convert.ToBase64String(Encoding.Default.GetBytes(Encoding.Default.GetString(AESEncrypt.TransformFinalBlock(buffer, 0, buffer.Length)) + IV));
}
The decryption method on java which is not working for me is:
public static String decrypt(byte[] cipherText, String encryptionKey) throws Exception{
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE");
SecretKeySpec key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES");
cipher.init(Cipher.DECRYPT_MODE, key,new IvParameterSpec(IV.getBytes("UTF-8")));
return new String(cipher.doFinal(cipherText),"UTF-8");
}
Edit 1:
I have implemented the php code for decryption.
function decrypt($text, $pkey)
{
$key = $pkey;
$text = base64_decode($text);
$IV = substr($text, strrpos($text, "-[--IV-[-") + 9);
$text = str_replace("-[--IV-[-" . $IV, "", $text);
return rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $IV), "\0");
}
Is there any manual way of implementing Rijndael-256 in Java? As someone said that
There is no support in any of the Sun JCE providers for anything other than Rijndael with the 128-bit blocksize
I don't have an option to use library
I have the following code,
public static String encrypt(String plainText, String key){
try{
PublicKey publicKey = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(Base64.decode(key, Base64.DEFAULT)));
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
return Base64.encodeToString(cipher.doFinal(plainText.getBytes("UTF-8")),Base64.DEFAULT);
}catch (Exception e) {
e.printStackTrace();
}
return null;
}
I want to convert this to C#. I have tried CryptUtils but it doesn't work https://github.com/ServiceStack/ServiceStack/blob/master/src/ServiceStack.Common/CryptUtils.cs
Sample key,
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ9AMIIBCgKCAQEAoqB1N9kugk4UKYnbh0fcg3qYyYKP0m4B
MjWd05ReeAdj+7JRYDEKO6xthDdVSdRO1/2V+YtY8DnXWnxRaICwu8235s3imZCyqgYnomPWdY+F
K540oTz/zug+9wbrlzt/WQFUU4lPlQbzm/Gjw8XfaCozT0e3bnWQcD7rORCOyuJgwSGgREjTv1ss
pgEaKTMknii9vpGZLeAXwoeIYROhuT4IoIkPDhtY0/UZiCi6v7Ja2dmy53VlWIkcm3rcnSJdvpXr
OgiHvaNABHmeymNycNqd6WUaysBRheluQ86nq/2nZPW0gcvmYt5zbMMYX3yY/n2WtAKeNQBAEW1q
b0s6MwIDAQAB
Possible encryped value,
Y3VTjghDnTrCeG8C/RklKsJ3Y0Mt89sSGGin28E4iQPQvKqeZBws7rBQEZaRamDWftxCkEYZs4Qh
V2l4IVlrawdtRmQlcQh8McrpqP/97Gz8pEDEYnqA7kqBTqZw0Z5o0WsshGSwiAQ9wNSym4xHejkq
zrKxWP8XCMkcT0NlKlRMoqKKICFKZbqWeSQkQM5y9OEcmB6inNNkJCoM1Ip48+cK3cOE6dqXNVrl
sSTZ8WQKwoB3dJmcYqexR3kAvBYdX6ZxEF+2+6b9h8+tc5G7Y5R2eqycyUossdkCcI3fNVhyc72P
axCjZFWZUgfDGCxg1WNhStrH9L8c59P35JKKug==
Since i don't have the private key, i can't decrypt, but at least this produces the right lengthed values.
So try this (you need bouncycastle for reading pem):
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
var keyBytes =
Convert.FromBase64String(
"MIIBI...."); // your key here
AsymmetricKeyParameter asymmetricKeyParameter = PublicKeyFactory.CreateKey(keyBytes);
RsaKeyParameters rsaKeyParameters = (RsaKeyParameters)asymmetricKeyParameter;
RSAParameters rsaParameters = new RSAParameters();
rsaParameters.Modulus = rsaKeyParameters.Modulus.ToByteArrayUnsigned();
rsaParameters.Exponent = rsaKeyParameters.Exponent.ToByteArrayUnsigned();
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(rsaParameters);
byte[] plaintext = Encoding.UTF8.GetBytes("amount=1¤cy=AED");
byte[] ciphertext = rsa.Encrypt(plaintext, false);
string cipherresult = Convert.ToBase64String(ciphertext);
I have code in PHP
$res = strtoupper(bin2hex(mcrypt_encrypt(MCRYPT_3DES, $this->hex2str($key), $this->hex2str($data), MCRYPT_MODE_ECB)));
public function hex2str($data) {
$len = strlen($data);
$res = pack("H" . $len, $data);
return $res;
}
I try to create in java version.
Java code :
private String doEncrypt3DES(String key, String data) throws Exception{
SecretKey secretKey;
byte[] keyValue;
Cipher c;
keyValue = Hex.decodeHex(key.toCharArray());
DESedeKeySpec keySpec = new DESedeKeySpec(keyValue);
secretKey = SecretKeyFactory.getInstance("DESede").generateSecret(keySpec);
// Create the cipher
c = Cipher.getInstance("DESede/ECB/NoPadding");
c.init(Cipher.ENCRYPT_MODE, secretKey);
byte[] text = data.getBytes("utf-8"); // Base64.decodeBase64(data);
byte[] textEncrypt = c.doFinal(text);
String hex = bytesToHex(textEncrypt);
return hex;
}
But they got different result. Can you help me to fix java code?
data : CED0CF172E8AC451B39FC746C5339F29
key : 436C6561724B657944657632536E724D436C6561724B6579
Use hex decode and not utf-8 decode to data.