public static decimal DecimalDecription(decimal value, string key)
{
//Random rnd = new Random();
//decimal randomNumbers = rnd.Next(1, 99);
string cipherInString = value.ToString();
var enkriptedKey = RijndaelHelper.Encrypt(key, key);
byte[] keyInBytes = Encoding.UTF8.GetBytes(enkriptedKey);
decimal randomNumber = 0;
for (int i = 0; i < keyInBytes.Length; i++)
{
randomNumber = (keyInBytes[i] * i) + randomNumber;
randomNumber = (i * 255) + randomNumber;
}
string randomString = randomNumber.ToString();
//for (int i = 0; i < randomNumbers; i++)
//{
// randomNumber = randomNumber + (8 * i);
//}
int j = 0;
var plainInString = "";
for (int i = 0; i < cipherInString.Length; i++)
{
if (j >= randomString.Length)
{
j = 0;
}
int indexof;
int cipherstring = (int)Char.GetNumericValue(cipherInString[i]); //cipher.Substring(i, 4);
int keystring = (int)Char.GetNumericValue(randomString[j]) >> 1; // randomString.Substring(j, 4);
//if (cipherstring == keystring)
//{
// indexof = 0;
//}
//else
//{
//indexof = cipherstring ^ keystring;
//indexof = (indexof + 7 >= 10) ? (indexof - 7) * (-1) : indexof + 7;
//indexof = indexof*(-1);
//indexof = indexof + 7;
//}
indexof = cipherstring ^ keystring;
indexof = indexof - 1;
indexof = indexof << 1;
plainInString = plainInString + indexof;
j++;
}
var noZeroStart = plainInString.TrimStart('0');
return(Convert.ToDecimal(noZeroStart));
}
public static decimal DecimalEncyption(decimal value, string key)
{
//Random rnd = new Random();
//decimal randomNumbers = rnd.Next(1, 99);
string valueInString = value.ToString();
valueInString = valueInString.PadLeft(15, '0');
var enkriptedKey = RijndaelHelper.Encrypt(key, key);
byte[] keyInBytes = Encoding.UTF8.GetBytes(enkriptedKey);
decimal randomNumber = 0;
for (int i = 0; i < keyInBytes.Length; i++)
{
randomNumber = (keyInBytes[i] * i) + randomNumber;
randomNumber = (i * 255) + randomNumber;
}
string randomString = randomNumber.ToString();
//for (int i = 0; i < randomNumbers; i++)
//{
// randomNumber = randomNumber + (8 * i);
//}
int j = 0;
string cipherInString = "";
for (int i = 0; i < valueInString.Length; i++)
{
if (j >= randomString.Length)
{
j = 0;
}
int indexof;
int plainstring = (int)Char.GetNumericValue(valueInString[i]);
int keystring = (int)Char.GetNumericValue(randomString[j]) >> 1;
//if (plainstring == 0)
//{
// indexof = keystring;
//}
//else
//{
//indexof = plainstring - 7;
//indexof = (indexof < 0) ? indexof * (-1) : indexof;
//indexof = indexof ^ keystring;
//indexof = plainstring - 7;
//indexof = indexof * (-1);
//indexof = indexof ^ keystring;
indexof = plainstring >> 1;
indexof = indexof + 1;
indexof = indexof ^ keystring;
//}
cipherInString = cipherInString + indexof;
j++;
}
j = 0;
//var plainInString = "";
//for (int i = 0; i < cipherInString.Length; i++)
//{
// if (j >= randomString.Length)
// j = 0;
// int indexof;
// int cipherstring = (int)Char.GetNumericValue(cipherInString[i]);//cipher.Substring(i, 4);
// int keystring = (int)Char.GetNumericValue(randomString[j]);// randomString.Substring(j, 4);
// if (cipherstring == keystring)
// {
// indexof = 0;
// }
// else
// {
// indexof = cipherstring ^ keystring;
// indexof = (indexof + 8 >= 10) ? (indexof - 8) * (-1) : indexof + 8;
// }
// plainInString = plainInString + indexof;
// j++;
//}
return(Convert.ToDecimal(cipherInString));
}
