I am trying to convert the following php code to C#:
$m_params = urlencode(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256,$key, json_encode($arParams), MCRYPT_MODE_ECB)));
What the documentation says:
m_params : A JSON array of data of additional parameters encrypted using the Rijindael-256 algorithm and encoded using a base64 algorithm.
What I've assumed?
Step 1: Create an array of params i.e. $arParams For php its declared like:
$arParams = array(
'success_url' => 'http://google.com/new_success_url',
'fail_url' => 'http://google.com/new_fail_url',
'status_url' => 'http://google.com/new_status_url',
);
For C# I've declared it like this:
var additional_params = new object[]
{
new {"http://google.com/new_success_url"},
new {"http://google.com/new_fail_url"},
new {"http://google.com/new_status_url"},
};
Step 2: Encode to JSON string, I've used JsonConvert.SerializeObject(additional_params);
Step 3: Encrypt the result using RIJNDAEL-256 Algorithm using ECB (I've used CBC as well)
Step 4: Encode the result using base64. I've used Convert.ToBase64String(encrypted);
Step 5: Url encode the result. I've used HttpUtility.UrlEncode(base64String, Encoding.UTF8);
Step 6: Save the result in m_params
My current code looks like this:
var additional_params = new object[]
{
new {"http://google.com/new_success_url"},
new {"http://google.com/new_fail_url"},
new {"http://google.com/new_status_url"},
};
string m_params ="";
//converting to Json object additional params
var jsonEncoded = JsonConvert.SerializeObject(additional_params);
try
{
string original = jsonEncoded;
// Create a new instance of the RijndaelManaged
// class. This generates a new key and initialization
// vector (IV).
using (RijndaelManaged myRijndael = new RijndaelManaged())
{
var final_Key = CreateMD5(payeer.m_key + payeer.m_orderid);
var rfc = CreateKey(final_Key);
// Encrypt the string to an array of bytes.
byte[] encrypted = EncryptStringToBytes(original, rfc[0], rfc[1]);
var base64String = Convert.ToBase64String(encrypted);
m_params = HttpUtility.UrlEncode(base64String, Encoding.UTF8);
// Decrypt the bytes to a string.
string roundtrip = DecryptStringFromBytes(encrypted, rfc[0], rfc[1]);
//Display the original data and the decrypted data.
Console.WriteLine("Original: {0}", original);
Console.WriteLine("Round Trip: {0}", roundtrip);
}
static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException("plainText");
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException("Key");
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException("IV");
byte[] encrypted;
// Create an RijndaelManaged object
// with the specified key and IV.
using (RijndaelManaged rijAlg = new RijndaelManaged())
{
rijAlg.Key = Key;
rijAlg.IV = IV;
rijAlg.Mode = CipherMode.ECB;
// rijAlg.KeySize = 256;
rijAlg.BlockSize = 256;
rijAlg.Padding = PaddingMode.PKCS7;
// Create an encryptor to perform the stream transform.
ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);
// Create the streams used for encryption.
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
//Write all data to the stream.
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
// Return the encrypted bytes from the memory stream.
return encrypted;
}
public static string CreateMD5(string input)
{
// Use input string to calculate MD5 hash
using (System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create())
{
byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
byte[] hashBytes = md5.ComputeHash(inputBytes);
// Convert the byte array to hexadecimal string
StringBuilder sb = new StringBuilder();
for (int i = 0; i < hashBytes.Length; i++)
{
sb.Append(hashBytes[i].ToString("X2"));
}
return sb.ToString();
}
}
public static dynamic CreateKey(string password)
{
var salt = new byte[] { 1, 2, 23, 234, 37, 48, 134, 63, 248, 4 };
const int Iterations = 9872;
using (var rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, salt, Iterations))
{
var key = rfc2898DeriveBytes.GetBytes(32);
var IV = rfc2898DeriveBytes.GetBytes(16);
dynamic[] arr = new dynamic[2];
arr[0] = key;
arr[1] = IV;
return arr;
}
}
Its not giving the same output. Am I missing something??
