Method RC4

LuaSTGPlus/Utility.h:80–94

        }
	public:
		RC4(const uint8_t* password, size_t len)
		{
			len = min(len, 256U);

			// ��ʼ��S��
			for (int i = 0; i < 256; ++i)
				S[i] = i;

			// S�г�ʼ�û�
			for (size_t i = 0, j = 0; i < 256; i++)
			{
				j = (j + S[i] + password[i % len]) % 256;
				std::swap(S[i], S[j]);
			}
		}
	};
}