Feature: Migrate SimplePlugins file management (文件管理迁移)

Migrate the SimplePlugins file-management feature into the YAMA client as an
experimental feature. The migrated CFileManager, MasterEncoder and Info-Zip
sources live under client/file/ and are isolated in the SimplePluginsFile
namespace to avoid clashing with the native FileManager class.

Add COMMAND_FILE_MANAGER_PLUGIN (163) and LoopFileManagerPlugin, spawned as
a sub-connection from KernelManager. Add an "实验功能" submenu with a
"文件管理" entry above "客户管理" in the online-hosts right-click menu,
routed via OnExperimentFileManager to the existing TOKEN_DRIVE_LIST_PLUGIN
dialog path.

Co-Authored-By: deepseek-v4-pro

client/file/MasterEncoder.cpp

@@ -0,0 +1,162 @@
+#include "StdAfx.h"
+#include "MasterEncoder.h"
+#include <fstream>
+#include <string>
+#include <iostream>
+
+namespace SimplePluginsFile {
+
+MasterEncoder::MasterEncoder()
+{
+    _codeKey = 100;
+    _sign = nullptr;
+    _signLen = 0;
+}
+
+MasterEncoder::~MasterEncoder()
+{
+    SAFE_DELETE_AR(_sign);
+}
+
+void MasterEncoder::setSignAndKey(char* sign, int signLen, unsigned char key)
+{
+    if (sign && signLen) {
+        _signLen = signLen;
+        SAFE_DELETE_AR(_sign);
+        _sign = new char[signLen];
+        if (_sign) {
+            memcpy(_sign, sign, signLen);
+        } else {
+            Mprintf("setSignAndKey Failed!\n");
+        }
+    }
+    _codeKey = key;
+}
+
+void MasterEncoder::encode(unsigned char* data, long size)
+{
+    for (long i = 0; i < size; i++) {
+        data[i] ^= _codeKey;
+    }
+}
+
+void MasterEncoder::decode(unsigned char* data, long size)
+{
+    for (long i = 0; i < size; i++) {
+        data[i] ^= _codeKey;
+    }
+}
+
+unsigned char* MasterEncoder::readPDF(const std::string& filepath, long& size)
+{
+    std::ifstream ifs;
+    ifs.open(filepath, std::ios::in | std::ios::binary);
+
+    if (!ifs.is_open()) {
+        Mprintf("文件打开失败: %s\n", filepath.c_str());
+        return nullptr;
+    }
+
+    ifs.seekg(0, std::ios_base::end);
+    size =(long) ifs.tellg();
+    ifs.seekg(0, std::ios_base::beg);
+    unsigned char* data = new unsigned char[size];
+    long count = 0;
+    while (count < size) {
+        ifs.read((char*)&data[count], sizeof(unsigned char));
+        count++;
+    }
+
+    Mprintf("read PDF size = %d\n", size);
+
+    ifs.close();
+
+    return data;
+}
+
+void MasterEncoder::writePDF(const std::string& filePath, unsigned char* data, long size)
+{
+    std::ofstream ofs;
+    ofs.open(filePath, std::ios::out | std::ios::trunc | std::ios::binary);
+
+    if (!ofs.is_open()) {
+        Mprintf("文件打开失败: %s\n", filePath.c_str());
+        return;
+    }
+
+    long count = 0;
+    while (count < size) {
+        ofs.write((char*)&data[count], sizeof(unsigned char));
+        count++;
+    }
+    Mprintf("save PDF size = %d\n", size);
+    ofs.close();
+}
+
+void MasterEncoder::encodePDF(const std::string& pdfPath, const std::string& savePath)
+{
+    long size = 0;
+    unsigned char* data = readPDF(pdfPath, size);
+
+    //判断是否已经加密过
+    if (memcmp(data, _sign, _signLen) == 0) {
+        Mprintf("加密过了, 直接保存: %s\n", pdfPath.c_str());
+        writePDF(savePath, data, size);
+    } else {
+        encode(data, size);
+
+        if (_signLen > 0) {
+            unsigned char* p = new unsigned char[size + _signLen];
+            memcpy(p, _sign, _signLen);
+            memcpy(p + _signLen, data, size);
+
+            writePDF(savePath, p, size + _signLen);
+
+            delete[] p;
+        } else {
+            writePDF(savePath, data, size);
+        }
+    }
+
+    delete[] data;
+}
+
+void MasterEncoder::decodePDF(const std::string& pdfPath, const std::string& savePath)
+{
+    long size = 0;
+    unsigned char* data = readPDF(pdfPath, size);
+
+    if (_signLen == 0) {
+        decode(data, size);
+        writePDF(savePath, data, size);
+    } else if (memcmp(data, _sign, _signLen) == 0) {
+        unsigned char* p = (data + _signLen);
+        decode(p, size - _signLen);
+        writePDF(savePath, p, size - _signLen);
+    } else {
+        Mprintf("解密失败: %s\n", pdfPath.c_str());
+    }
+
+    delete[] data;
+}
+
+unsigned char* MasterEncoder::decode(const std::string& pdfPath, long& size)
+{
+    unsigned char* data = readPDF(pdfPath, size);
+
+    if (_signLen == 0) {
+        decode(data, size);
+        return data;
+    } else if (memcmp(data, _sign, _signLen) == 0) {
+        size -= _signLen;
+        unsigned char* p = new unsigned char[size];
+        memcpy(p, data + _signLen, size);
+        decode(p, size);
+        delete[] data;
+        return p;
+    } else {
+        return data;
+    }
+}
+
+}