I have almost lost my hair, mind and everything else! I have been trying to convert this PHP function to C#:
function encrypt_decrypt($action, $string) {
$output = false;
$key = 'My strong secret key';
// initialization vector
$iv = md5(md5($key));
$output = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, $iv);
$output = bin2hex($output);
return $output;
}
I have been working with Rijandel Class:
function encrypt_decrypt(string password) {
UTF8Encoding encoding = new UTF8Encoding();
// For consistency with PHP function, MD5Encrypt applies MD5 encryption and does a bin2hex
byte[] Key = Encoding.ASCII.GetBytes(MD5Encrypt(password).ToLower());
byte[] IV = Encoding.ASCII.GetBytes(MD5Encrypt(MD5Encrypt(password).ToLower()).ToLower());
RijndaelManaged rj = new RijndaelManaged();
rj.BlockSize = 256;
rj.KeySize = 256;
rj.Key = Key;
rj.IV = IV;
rj.Mode = CipherMode.CBC;
MemoryStream ms = new MemoryStream();
using (CryptoStream cs = new CryptoStream(ms, rj.CreateEncryptor(Key, IV), CryptoStreamMode.Write))
{
using (StreamWriter sw = new StreamWriter(cs))
{
sw.Write(message);
sw.Close();
}
cs.Close();
}
byte[] encoded = ms.ToArray();
string output = "";
foreach (var ele in encoded)
{
output += ele.ToString("X2");
}
return output;
}
I have been validating the output of the PHP code with that from the C# code and they do not match. (http://writecodeonline.com/php/). Any feedback would be appreciated.