[C#] ROTServiceProvider (Caesarverschlüsselungen)

[par0noid]

Mit folgender Klasse lassen sich alle gängigen "ROT-Verschlüsselungen" generieren

namespace ROT
{
    class ROTServiceProvider
    {
        public string rot5(string s)
        {
            string k = "";


            foreach (char c in s)
            {
                if ((int)c >= 48 && (int)c <= 57)
                {
                    k += (char)((((c - 48) + 5) % 10) + 48);
                    continue;
                }


                k += c;
            }


            return k;
        }


        public string rot13(string s)
        {
            string k = "";


            foreach (char c in s)
            {
                if ((int)c >= 65 && (int)c <= 90)
                {
                    k += (char)((((c - 65) + 13) % 26) + 65);
                    continue;
                }


                if ((int)c >= 97 && (int)c <= 122)
                {
                    k += (char)((((c - 97) + 13) % 26) + 97);
                    continue;
                }


                k += c;
            }


            return k;
        }


        public string rot18(string s)
        {
            return rot5(rot13(s));
        }


        public string rot47(string s)
        {
            string k = "";


            foreach (char c in s)
            {
                if ((int)c >= 33 && (int)c <= 126)
                {
                    k += (char)((((c - 33) + 47) % 94) + 33);
                    continue;
                }


                k += c;
            }


            return k;
        }
    }
}

[Leange]

Hoi

Meine Lösung aus den guten alten VB.net Zeiten xD

Public Class caesar

    Public Shared Function rot(ByVal input As String, ByVal key As Integer) As String
        rot = ""
        For i = 0 To input.Length - 1
            Dim tmp As Int32 = Asc(input.Substring(i, 1))
            If tmp >= 97 And tmp <= 122 Then
                tmp += key
                If tmp > 122 Then
                    tmp -= 26
                End If
                rot += Chr(tmp)
            ElseIf tmp >= 65 And tmp <= 90
                tmp += key
                If tmp > 90 Then
                    tmp -= 26
                End If
                rot += Chr(tmp)
            Else
                rot += Chr(tmp)
            End If
        Next
    End Function

    Public Shared Function brute(ByVal input As String) As List(Of String)
        brute = New List(Of String)
        For key = 1 To 26
            brute.Add(rot(input, key))
        Next
    End Function

End Class