vilaureu
71971df893
When only having OpenSSL 3 installed, FasterHashing.FasterHash.Create() currently throws an EntryPointNotFoundException. Mitigate this by falling back to HashAlgorithm.Create in the error case.
50 lines
2.0 KiB
C#
50 lines
2.0 KiB
C#
// Copyright (C) 2017, The Duplicati Team
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// http://www.duplicati.com, info@duplicati.com
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Collections.Generic;
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using System.Security.Cryptography;
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namespace Duplicati.Library.Utility
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{
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/// <summary>
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/// This class helps picking the fastest hash algorithm implementation,
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/// which is what <seealso cref="System.Security.Cryptography.HashAlgorithm.Create()"/> should do, but does not.
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/// It falls back to the aforementioned System library when creation of
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/// the faster hash function fails.
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/// </summary>
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public static class HashAlgorithmHelper
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{
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/// <summary>
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/// Create the hash algorithm with the specified name.
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/// </summary>
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/// <returns>The hash algorithm.</returns>
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/// <param name="name">The name of the algorithm to create.</param>
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public static HashAlgorithm Create(string name)
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{
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try
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{
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return FasterHashing.FasterHash.Create(name);
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}
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// Only having OpenSSL 3 installed might trigger this exception.
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catch (EntryPointNotFoundException)
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{
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return HashAlgorithm.Create(name);
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}
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}
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}
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}
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