46 lines
1.1 KiB
Text
46 lines
1.1 KiB
Text
import system'text;
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import system'culture;
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import system'math;
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import system'routines;
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import extensions;
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class VCipher
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{
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string encrypt(string txt, string pw, int d)
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{
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auto output := new TextBuilder();
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int pwi := 0;
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string PW := pw.toUpper();
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var TXT := txt.toUpper();
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foreach(char t; in TXT)
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{
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if (t < $65) $continue;
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int tmp := t - 65 + d * (pw[pwi] - 65);
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if (tmp < 0) tmp += 26;
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output.write((65 + tmp.mod(26)).toChar());
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pwi++;
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if (pwi == PW.Length) { pwi := 0 }
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};
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^ output.Value
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}
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}
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public program()
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{
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var v := new VCipher();
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var s0 := "Beware the Jabberwock, my son! The jaws that bite, the claws that catch!";
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var pw := "VIGENERECIPHER";
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console.printLine(s0,newLineConstant,pw,newLineConstant);
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var s1 := v.encrypt(s0, pw, 1);
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console.printLine("Encrypted:",s1);
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s1 := v.encrypt(s1, "VIGENERECIPHER", -1);
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console.printLine("Decrypted:",s1);
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console.printLine("Press any key to continue..");
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console.readChar()
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}
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