duplicati/Duplicati/Library/Utility/DeviceIDHelper.cs

// Copyright (C) 2025, The Duplicati Team
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// 
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#nullable enable

using Duplicati.Library.Utility;
using System.Collections.Generic;
using System.Linq;
using System;

/// <summary>
/// Helper class to get the device ID string and computed hash
/// </summary>
public static class DeviceIDHelper
{

    /// <summary>
    /// The empty ID produced by DeviceIdBuilder if no information is available
    /// </summary>
    private static readonly string[] EMPTY_DEVICE_IDS = [
        // Known empty Id
        "WERC8GMRZGE196QVYK49JVXS4GKTWGF4CJDS6K54JPCHPY2JQ1AG",
        string.Empty
    ];

    /// <summary>
    /// Hashes a set of device IDs
    /// </summary>
    /// <param name="deviceIds">The deviceIds to hash</param>
    /// <returns>The list of hashed ids</returns>
    private static HashSet<string> HashDeviceIds(IEnumerable<string> deviceIds)
    {
        var hasher = HashFactory.CreateHasher("SHA256");
        return deviceIds.Select(x => x.ComputeHashToHex(hasher)).ToHashSet();
    }

    /// <summary>
    /// The empty deviceId hashes
    /// </summary>
    public static readonly HashSet<string> EMPTY_DEVICE_ID_HASHES = HashDeviceIds(EMPTY_DEVICE_IDS);

    /// <summary>
    /// Get the device ID hashed in SHA256 and in hex format 
    /// </summary>
    /// <returns></returns>
    public static string GetDeviceIDHash()
        => throw new InvalidOperationException("Device ID is not available");


    /// <summary>
    /// Returns a value indicating if the device ID is available on this system
    /// </summary>
    public static bool HasTrustedDeviceID => false;
}