using System; using UnityEngine; namespace Obfuz.Utils { public static class EncryptionUtil { public static int GetBitCount(int value) { int count = 0; while (value > 0) { count++; value >>= 1; } return count; } public static int GenerateEncryptionOpCodes(IRandom random, IEncryptor encryptor, int encryptionLevel, bool logWarningWhenExceedMaxOps = true) { if (encryptionLevel <= 0 || encryptionLevel > 4) { throw new ArgumentException($"Invalid encryption level: {encryptionLevel}, should be in range [1,4]"); } int vmOpCodeCount = encryptor.OpCodeCount; long ops = 0; for (int i = 0; i < encryptionLevel; i++) { long newOps = ops * vmOpCodeCount; // don't use 0 int op = random.NextInt(1, vmOpCodeCount); newOps |= (uint)op; if (newOps > uint.MaxValue) { if (logWarningWhenExceedMaxOps) { Debug.LogWarning($"OpCode overflow. encryptionLevel:{encryptionLevel}, vmOpCodeCount:{vmOpCodeCount}"); } break; } else { ops = newOps; } } return (int)ops; } } }