add old lci module

lci/include/Crypto/Crypto_Basic.hpp

@@ -0,0 +1,55 @@
+#pragma once
+#include <string>
+#include <vector>
+#include <stdexcept>
+namespace qing {
+	class Crypto_Basic {
+		public:
+		class CryptoExp: public std::runtime_error {
+			public:
+			CryptoExp(const std::string& msg): std::runtime_error(msg) {
+				;
+			}
+		};
+		protected:
+		/* 字节码转十六进制字符串 */
+		static std::string bytes_to_hex(const std::vector<unsigned char>& data) {
+			static const char hex_chars[] = "0123456789abcdef";
+			std::string hex_string;
+			hex_string.reserve(data.size() * 2);
+	
+			for (unsigned char byte: data) {
+				hex_string.push_back(hex_chars[byte >> 4]);	// 高4位
+				hex_string.push_back(hex_chars[byte & 0x0F]);	// 低4位
+			}
+
+			return hex_string;
+		}
+
+		/* 十六进制字符串转字节码 */
+		static std::vector<unsigned char> hex_to_bytes(const std::string &hex) {
+			// 检查长度是否为偶数
+			if (hex.size() % 2 != 0) {
+				throw std::invalid_argument("十六进制字符串长度必须为偶数");
+			}
+	
+			std::vector<unsigned char> bytes;
+			bytes.reserve(hex.size() / 2);
+
+			auto char_to_nibble = [](char c) -> unsigned char {
+				if (c >= '0' && c <= '9') return c - '0';
+				if (c >= 'a' && c <= 'f') return 10 + (c - 'a');
+				if (c >= 'A' && c <= 'F') return 10 + (c - 'A');
+				throw std::invalid_argument("无效的十六进制字符：" + std::string(1, c));
+			};
+
+			for (size_t i = 0; i < hex.size(); i += 2) {
+				unsigned char high = char_to_nibble(hex[i]);
+				unsigned char low = char_to_nibble(hex[i + 1]);
+				bytes.push_back((high << 4) | low);
+			}
+
+			return bytes;
+		}
+	};
+}