Move all files into project subdirectory

Aaru.Checksums/SHA512Context.cs

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+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : SHA512Context.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Checksums.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Wraps up .NET SHA512 implementation to a Init(), Update(), Final() context.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2023 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+using Aaru.CommonTypes.Interfaces;
+
+namespace Aaru.Checksums;
+
+/// <inheritdoc />
+/// <summary>Wraps up .NET SHA512 implementation to a Init(), Update(), Final() context.</summary>
+[SuppressMessage("ReSharper", "UnusedMethodReturnValue.Global")]
+[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+[SuppressMessage("ReSharper", "UnusedMember.Global")]
+public sealed class Sha512Context : IChecksum
+{
+    readonly SHA512 _provider;
+
+    /// <summary>Initializes the SHA512 hash provider</summary>
+    public Sha512Context() => _provider = SHA512.Create();
+
+#region IChecksum Members
+
+    /// <inheritdoc />
+    public string Name => Localization.SHA512_Name;
+
+    /// <inheritdoc />
+    public Guid Id => new("1E167BCB-2362-44DA-B5B0-B7ED3A22D5A6");
+
+    /// <inheritdoc />
+    public string Author => Authors.NataliaPortillo;
+
+    /// <inheritdoc />
+    /// <summary>Updates the hash with data.</summary>
+    /// <param name="data">Data buffer.</param>
+    /// <param name="len">Length of buffer to hash.</param>
+    public void Update(byte[] data, uint len) => _provider.TransformBlock(data, 0, (int)len, data, 0);
+
+    /// <inheritdoc />
+    /// <summary>Updates the hash with data.</summary>
+    /// <param name="data">Data buffer.</param>
+    public void Update(byte[] data) => Update(data, (uint)data.Length);
+
+    /// <inheritdoc />
+    /// <summary>Returns a byte array of the hash value.</summary>
+    public byte[] Final()
+    {
+        _provider.TransformFinalBlock(Array.Empty<byte>(), 0, 0);
+
+        return _provider.Hash;
+    }
+
+    /// <inheritdoc />
+    /// <summary>Returns a hexadecimal representation of the hash value.</summary>
+    public string End()
+    {
+        _provider.TransformFinalBlock(Array.Empty<byte>(), 0, 0);
+        var sha512Output = new StringBuilder();
+
+        if(_provider.Hash is null)
+            return null;
+
+        foreach(byte h in _provider.Hash)
+            sha512Output.Append(h.ToString("x2"));
+
+        return sha512Output.ToString();
+    }
+
+#endregion
+
+    /// <summary>Gets the hash of a file</summary>
+    /// <param name="filename">File path.</param>
+    public static byte[] File(string filename)
+    {
+        var    localSha512Provider = SHA512.Create();
+        var    fileStream          = new FileStream(filename, FileMode.Open);
+        byte[] result              = localSha512Provider.ComputeHash(fileStream);
+        fileStream.Close();
+
+        return result;
+    }
+
+    /// <summary>Gets the hash of a file in hexadecimal and as a byte array.</summary>
+    /// <param name="filename">File path.</param>
+    /// <param name="hash">Byte array of the hash value.</param>
+    public static string File(string filename, out byte[] hash)
+    {
+        var localSha512Provider = SHA512.Create();
+        var fileStream          = new FileStream(filename, FileMode.Open);
+        hash = localSha512Provider.ComputeHash(fileStream);
+        var sha512Output = new StringBuilder();
+
+        foreach(byte h in hash)
+            sha512Output.Append(h.ToString("x2"));
+
+        fileStream.Close();
+
+        return sha512Output.ToString();
+    }
+
+    /// <summary>Gets the hash of the specified data buffer.</summary>
+    /// <param name="data">Data buffer.</param>
+    /// <param name="len">Length of the data buffer to hash.</param>
+    /// <param name="hash">Byte array of the hash value.</param>
+    public static string Data(byte[] data, uint len, out byte[] hash)
+    {
+        var localSha512Provider = SHA512.Create();
+        hash = localSha512Provider.ComputeHash(data, 0, (int)len);
+        var sha512Output = new StringBuilder();
+
+        foreach(byte h in hash)
+            sha512Output.Append(h.ToString("x2"));
+
+        return sha512Output.ToString();
+    }
+
+    /// <summary>Gets the hash of the specified data buffer.</summary>
+    /// <param name="data">Data buffer.</param>
+    /// <param name="hash">Byte array of the hash value.</param>
+    public static string Data(byte[] data, out byte[] hash) => Data(data, (uint)data.Length, out hash);
+}