55 lines
2.3 KiB
C#
55 lines
2.3 KiB
C#
// Copyright (C) 2024, The Duplicati Team
|
|
// https://duplicati.com, hello@duplicati.com
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
|
// copy of this software and associated documentation files (the "Software"),
|
|
// to deal in the Software without restriction, including without limitation
|
|
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
// and/or sell copies of the Software, and to permit persons to whom the
|
|
// Software is furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Security.Cryptography;
|
|
|
|
namespace Duplicati.Library.Utility
|
|
{
|
|
/// <summary>
|
|
/// This class helps picking the fastest hash algorithm implementation,
|
|
/// which is what <seealso cref="System.Security.Cryptography.HashAlgorithm.Create()"/> should do, but does not.
|
|
/// It falls back to the aforementioned System library when creation of
|
|
/// the faster hash function fails.
|
|
/// </summary>
|
|
public static class HashAlgorithmHelper
|
|
{
|
|
/// <summary>
|
|
/// Create the hash algorithm with the specified name.
|
|
/// </summary>
|
|
/// <returns>The hash algorithm.</returns>
|
|
/// <param name="name">The name of the algorithm to create.</param>
|
|
public static HashAlgorithm Create(string name)
|
|
{
|
|
try
|
|
{
|
|
return FasterHashing.FasterHash.Create(name);
|
|
}
|
|
// Only having OpenSSL 3 installed might trigger this exception.
|
|
catch (EntryPointNotFoundException)
|
|
{
|
|
return HashAlgorithm.Create(name);
|
|
}
|
|
}
|
|
}
|
|
}
|