private void GetCipher(CipherCtx ctx, Mode CipherMode)
{
if (!CharString.Any(x => x.Equals(ctx.Text)))
{
ctx.Cipher = ctx.Text;
return;
}
ctx.TextIndex = CharString.IndexOf(ctx.Text);
ctx.PassIndex = CharString.IndexOf(ctx.Pass);
var gc = CipherMode == Mode.Encrypt ? ctx.TextIndex + ctx.PassIndex : ctx.TextIndex - ctx.PassIndex;
if (gc > CharString.Length)
{
gc = gc - (CharString.Length - 1);
}
if (gc < 0)
{
gc = (CharString.Length - 1) - Math.Abs(gc);
}
ctx.CipherIndex = gc;
ctx.Cipher = CharString[gc];
}
public string Cipher(string StrVal, string Key, Mode CipherMode = Mode.Encrypt)
{
string ky = ReGenerateKey(Key, StrVal.Length);
CipherDictionary = new List <CipherCtx>();
for (var i = 0; i < StrVal.Length; i++)
{
var gg = new CipherCtx
{
Text = StrVal[i],
Pass = ky[i]
};
GetCipher(gg, CipherMode);
CipherDictionary.Add(gg);
}
return(new string(CipherDictionary.Select(x => x.Cipher).ToArray()));
}