Thread: Help With Decrypt A value from a key

Hi, I got a the key: "HK8N99LQ" and the
value: "THBiUURtaHdCSDlFRWYva1VSRm5QUCtWN2NnditldVE2RnhEa zdLNHlwZEZZQnlxU0xDQ3Zlc1ZrV1RNNHgyamcyNXgvUFUxQk1 UQVpPLzJTVDZnR3ZIUTZLbjRoemo4aU9ORVdKZ21kdktjOEZqZ UM0bkwvd29hbWM3bXQ2cXcvbjZRaUdtZDU5ZWtUSlFMZm1DUHZ aL284OGdqd1JJTGNvQzczb1dISTNScFhSc3VDemRRVTM2bmNic lM4b2FuTWM5RUE2UnUvL1RoT0tSOGFScDltSHZaY2R2MHNQS2x COGZOOUkzazcvVmtCZ2FpTnNwZ3p4aGVBWkJtUWJzN1M2YnAyM DJvMXFUMHdCYk9MUG5vNUNOaEtrVTZCZ2RJWTh3dzNqMDR6VVk vMTNNUW0reGtrUT090" from http://api.cashcow.co.il/

to decrypt the code in c# the website provide this code:

public static string Decrypt(string app_token, string signed_request)
        {
            byte[] keyArray;
            //get the byte code of the string
 
            byte[] toEncryptArray = Convert.FromBase64String(signed_request);
 
            // app token
            string key = app_token;
 
            //if hashing was used get the hash code with regards to your key
            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
            keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
            //release any resource held by the MD5CryptoServiceProvider
 
            hashmd5.Clear();
 
            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
            //set the secret key for the tripleDES algorithm
            tdes.Key = keyArray;
            //mode of operation. there are other 4 modes. 
            //We choose ECB(Electronic code Book)
 
            tdes.Mode = CipherMode.ECB;
            //padding mode(if any extra byte added)
            tdes.Padding = PaddingMode.PKCS7;
 
            ICryptoTransform cTransform = tdes.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(
                                 toEncryptArray, 0, toEncryptArray.Length);
            //Release resources held by TripleDes Encryptor                
            tdes.Clear();
            //return the Clear decrypted TEXT
            return UTF8Encoding.UTF8.GetString(resultArray);
        }

but how I decrypt it in Java, I tried to use that code but I got error message:

public String Decrypt(String signed_request)
    {		
		String decryptedString = null;
		try
		{    
		    // Generate the secret key specs.
		    byte[] key = "HK8N99LQ".getBytes();
		    MessageDigest sha = MessageDigest.getInstance("MD5");
		    key = sha.digest(key);	   	    
		    key = Arrays.copyOf(key, 16); // use only first 128 bit
 
		    SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
 
		    // Instantiate the cipher
		    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
 
		    //DECRYPT_MODE
		    cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
		    byte[] original = cipher.doFinal(signed_request.getBytes());
		    decryptedString = new String(original);
		}
		catch(Exception e)
		{
			String message = e.getMessage();
			System.out.print(message);
		}
 
        return decryptedString;
    }

Error Message:
Input length must be multiple of 16 when decrypting with padded cipher.