Created
June 4, 2025 13:56
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CrackMe solution
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| String Keygen() { | |
| Byte[] key = new Byte[16] { 4, 4, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; | |
| Byte[] primes = new Byte[4] { 2, 3, 5, 7 }; | |
| while (true) { | |
| LOOP: | |
| for (Int32 i = 4; i < 16; i++) | |
| key[i] = (Byte)Random.Shared.Next(0, 10); | |
| if (key.Skip(4).Any(x => x == 4)) | |
| continue; | |
| if (key.Distinct().Count() < 5) | |
| continue; | |
| if (key.Count(x => x == 8) < 3) | |
| continue; | |
| if (key.Count(x => primes.Contains(x)) < 2) | |
| continue; | |
| Int32 sum = key.Sum(x => x switch { | |
| 0 => -14, | |
| 1 => -12, | |
| 2 => -8, | |
| 3 => -7, | |
| 4 => -3, | |
| 5 => -1, | |
| 6 => 2, | |
| 7 => 4, | |
| 8 => 8, | |
| 9 => 9 | |
| }); | |
| if (55 <= sum && sum <= 110) | |
| continue; | |
| for (Int32 i = 0; i < 82; i++) | |
| sum = (sum + i) % 110; | |
| if (sum < 55) | |
| continue; | |
| for (Int32 i = 4; i <= 12; i += 4) | |
| for (Int32 j = 0; j < 3; j++) | |
| if (key[i + j] == key[i + j + 1]) | |
| goto LOOP; | |
| break; | |
| } | |
| return key.Aggregate("", (a, b) => $"{a}{b}", s => s.Insert(12, "-").Insert(8, "-").Insert(4, "-")); | |
| } |
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