private string EncryptString(string str)
{
return
(Convert.ToBase64String(Encoding.BigEndianUnicode.GetBytes(Rot17.Encrypt(str)))
.ToCharArray()
.Select(x => $"{(int) x:X}")
.Aggregate(new StringBuilder(), (x, y) => x.Append(y))
.ToString());
}
private string DecryptString(string str)
{
return
(Rot17.Decrypt(
(Encoding.BigEndianUnicode.GetString(
Convert.FromBase64String(
Enumerable.Range(0, str.Length / 2)
.Select(i => str.Substring(i * 2, 2))
.Select(x => (char)Convert.ToInt32(x, 16))
.Aggregate(new StringBuilder(), (x, y) => x.Append(y))
.ToString())))));
}
