added some code

wrote some code to test some functionallity

src/client_backend/scan.cpp

@@ -1,14 +1,15 @@
 #include "scan.h"
 #include <windows.h>
 #include <iostream>
-
+#include <openssl/md5.h>
 #include <windows.h>
 #include <iostream>
+#include "md5hash.h"
+#include <string>
 #ifndef SCAN_CPP
 #define SCAN_CPP
-#include <string>
 int cnt = 0;
-void ListFilesRecursive(const std::string& directory) {
+void ListFilesRecursive(const std::string& directory, int thread_id) {
     std::string search_path = directory + "\\*.*";
     WIN32_FIND_DATA find_file_data;
     HANDLE hFind = FindFirstFile(search_path.c_str(), &find_file_data);
@@ -27,17 +28,66 @@ void ListFilesRecursive(const std::string& directory) {
         std::string full_path = directory + "\\" + find_file_data.cFileName;
         if (find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
             // If it's a directory, recurse into it
-            ListFilesRecursive(full_path);
+            ListFilesRecursive(full_path,thread_id);
         }
         else {
             // If it's a file, print its name
+            /*char md5Hash[2 * MD5_DIGEST_LENGTH + 1];
+            
+            md5_file(full_path.c_str(), md5Hash);
+            printf("%s\n", md5Hash);
+            printf("%d\n", scan_hash("C:\\Users\\janis\\Documents\\ma_av_tests\\OutputFile.txt", "96be95b122c2b9b8bb5765c312ca4f73"));
+            if (scan_hash("C:\\Users\\janis\\Documents\\ma_av_tests\\OutputFile.txt", md5Hash) == 1) {
+                printf("virus found");
+
+            }*/
             cnt++;
             if (cnt % 1000 == 0) {
-                printf("Processed %d files\n", cnt);
+                printf("Processed %d files; sent from thread %d\n", cnt,thread_id);
             }
         }
     } while (FindNextFile(hFind, &find_file_data) != 0);
 
     FindClose(hFind);
 }
+int scan_hash(const std::string& filename, const std::string& searchString) {//!!!! does not work with e.g. utf-16 or something like that. either ascii or utf8!!
+    HANDLE hFile = CreateFile(filename.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (hFile == INVALID_HANDLE_VALUE) {
+        std::cerr << "Error: Unable to open the file." << std::endl;
+        return 2;
+    }
+
+    HANDLE hMapping = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
+    if (hMapping == NULL) {
+        std::cerr << "Error: Unable to create file mapping." << std::endl;
+        CloseHandle(hFile);
+        return 2;
+    }
+
+    char* fileData = static_cast<char*>(MapViewOfFile(hMapping, FILE_MAP_READ, 0, 0, 0));
+    if (fileData == NULL) {
+        std::cerr << "Error: Unable to map the file into memory." << std::endl;
+        CloseHandle(hMapping);
+        CloseHandle(hFile);
+        return 2;
+    }
+
+    DWORD fileSize = GetFileSize(hFile, NULL);
+    std::string fileContent(fileData, fileSize);
+
+    // Search for the specific string in the file content
+    size_t foundPos = fileContent.find(searchString);
+    if (foundPos != std::string::npos) {
+        UnmapViewOfFile(fileData);
+        CloseHandle(hMapping);
+        CloseHandle(hFile);
+        return 1;//found
+    }
+
+    // Unmap the memory and close the handles
+    UnmapViewOfFile(fileData);
+    CloseHandle(hMapping);
+    CloseHandle(hFile);
+    return 0;
+}
 #endif