31 lines
610 B
Dart
31 lines
610 B
Dart
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String h_(String str) {
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int a = 1;
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int b = 3;
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int c = 5;
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int d = 7;
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for (int n in str.codeUnits) {
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a = (a + n + d) * 17 % 52;
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b = (b + n * a) * 23 % 52;
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c = (c + n + b) * 47 % 52;
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d = (d + n * c) * 41 % 52;
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}
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if (a < 26) a += 65;
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else a += 71;
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if (b < 26) b += 65;
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else b += 71;
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if (c < 26) c += 65;
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else c += 71;
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if (d < 26) d += 65;
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else d += 71;
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return new String.fromCharCodes([a, b, c, d]);
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}
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void main(List<String> args) {
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// 对于每一个输入 都混淆一遍再输出
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for (String arg in args) {
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print(arg + " -> " + h_(arg));
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}
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}
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