Xvirus_SDK_CSharp/README.md

Xvirus SDK C#

Xvirus SDK 4.2.2 C# bindings.

Table of Contents

• Xvirus SDK C#
  • Table of Contents
  • Minimum Requirements
  • Changelog
  • Known Issues
  • Get Started
  • Avaiable Functions
  • Model
  • Settings
  • Exceptions

Minimum Requirements

To use Xvirus C# SDK you need:

• .NET 7 SDK - download

The following Operating Systems are supported:

• Windows:
  • Windows 10 1607
  • Windows 11 22000
  • Windows Server 2012
  • Windows Server Core 2012
• Linux (glibc 2.17):
  • Alpine Linux 3.15
  • CentOS 7
  • Debian 10
  • Fedora 36
  • openSUSE 15
  • Oracle Linux 7
  • Red Hat Enterprise Linux 7
  • SUSE Enterprise Linux (SLES) 12 SP2
  • Ubuntu 18.04

Changelog

• Version 4.2.2:

  • Optimized scanning speed of PDF files
  • ScanResult now returns the file path
  • Added new ScanFolder() and ScanFolderString() functions

• Version 4.2.1:

  • Optimized scanning speed of big files
  • Optimized scanning speed in Linux version

• Version 4.2:

  • Reduced glibc minimum version to 2.17 on Linux
  • Added "Logging()" function to enable/disable logging
  • Added "BaseFolder()" function to set a custom base folder
  • Added new setting "DatabaseFolder" to set the Database folder path
  • Fixed C++ binding will return "Success=false" correctly when failing to scan a file

• Version 4.1:

  • Upgraded from .NET 5 to .NET 7
  • C++ bindings now also support Linux
  • Changed how exceptions are handled in C++ bindings

• Version 4.0:

  • Completely redone in .NET 5
  • Now supports Linux (CLI and C# bindings only)
  • Added XvirusAI scan engine (BETA)
  • Scan speed is up to 2x faster
  • Fixed memory usage spike when scanning large files
  • Removed file size limit for scanned files by default
  • The checkUpdate function can now check for SDK updates
  • Added 3 new settings "EnableAIScan", "MaxScanLength" and "DatabaseVersion"

Known Issues

• XvirusAI engine is still in BETA. It is not recomended to use in production yet.
• XvirusAI engine does not work in C++ bindings.
• The checkUpdate function can now check for SDK updates but can't update it

Get Started

The "example" folder contains an example project on how to import and use Xvirus SDK in C# (.NET 7).

You can run it by building it and then running executable file in the output folder.

Avaiable Functions

You have the following functions available:

• Load - Loads Xvirus Scan Engine into memory, if set force=true it will reload the scan engine, even if it is already loaded.
• Unload - Unloads Xvirus Scan Engine from memory.
• Scan - Scans the file located at filepath. It will return a ScanResult.
• ScanString - Scans the file located at filepath. It will return one of the following strings:
  • "Safe" - If no malware is detected.
  • "Malware" - If malware is detected but the name isn't known.
  • Malware Name - If it is malware from a known family (example: "Trojan.Downloader").
  • "AI.{aiScore}" - Score of the file using XvirusAI from 0 to 100, the higher the score the more probable it is malicious (example: "AI.99").
  • "File not found!" - If no file is found in the submited path.
  • "File too big!" - If the file size is bigger than the set limit.
  • "Could not get file hash!" - There was an error calculating the hash of the file.
• ScanFolder - Scans all the files inside the folder at folderpath. It will return an IEnumerable of ScanResult.
• ScanFolderString - Scans all the files inside the folder at folderpath. It will return the scan result message for each file scanned.
• CheckUpdates - Checks and updates the databases and AI engine to the most recent versions. If checkSDKUpdates=true then it will also check for SDK updates. If loadDBAfterUpdate=true then it will reload the Xvirus Scan Engine after the update is done. It can return the following strings:
  • "There is a new SDK version available!"
  • "Database was updated!"
  • "Database is up-to-date!"
• GetSettings - returns object representation of the settings.json file.
• GetSettingsAsString - returns a string representation of the settings.json file.
• Logging - Sets and returns if Logging is enabled. If no enableLogging value is provided it will only return.
• BaseFolder - Sets and returns the BaseFolder path. If no baseFolder value is provided it will only return.
• Version - returns the version of the SDK/CLI.

Model

The scan and scanFolder functions return a class ScanResult with the following properties:

public class ScanResult
{
    public bool IsMalware { get; set; } // true if malware
    public string Name { get; set; } // detection name
    public double MalwareScore { get; set; } // between 0 and 1, higher score means more likely to be malware, -1 if there was an error
    public string Path { get; set; } // file path
}

Settings

Settings are located in the "settings.json" file in the root folder of the SDK. There are 5 avaiable options:

• EnableHeuristics - Enables heuristics scanning of files. Default: true
• EnableAIScan - Enables XvirusAI scan engine. This feature is still in BETA. Default: false
• MaxScanLength - Maximum file size to be scanned in bytes. If set "null" then there is no limit. Default: null
• DatabaseFolder - Path to the database folder, it accepts both relative and absolute paths. Default: "Database"
• DatabaseVersion - KeyValue list of database files version. This is updated automatically when using the "checkUpdate()" function.

Example of a settings.json file:

{
  "EnableHeuristics": true,
  "EnableAIScan": false,
  "MaxScanLength": null,
  "DatabaseFolder": "Database",
  "DatabaseVersion": {
    "AIModel": 0,
    "MainDB": 0,
    "DailyDB": 0,
    "WhiteDB": 0,
    "DailywlDB": 0,
    "HeurDB": 0,
    "HeurDB2": 0,
    "MalvendorDB": 0
  }
}

Exceptions

If any of the functions fail it may return an exception.

All exceptions are logged in the errorlog.txt file.