mirror of
https://github.com/ShareX/ShareX.git
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164 lines
No EOL
5.3 KiB
C#
164 lines
No EOL
5.3 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright © 2007-2015 ShareX Developers
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System.ComponentModel;
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using System.Diagnostics;
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using System.IO;
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using System.Security.Cryptography;
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namespace ShareX.HelpersLib
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{
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public class HashCheck
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{
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public string FilePath { get; private set; }
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public HashType HashType { get; private set; }
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public bool IsWorking { get; private set; }
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public delegate void ProgressChanged(float progress);
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public event ProgressChanged FileCheckProgressChanged;
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public delegate void Completed(string result, bool cancelled);
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public event Completed FileCheckCompleted;
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private BackgroundWorker bw;
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public HashCheck()
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{
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bw = new BackgroundWorker();
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bw.DoWork += CheckThread;
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bw.ProgressChanged += bw_ProgressChanged;
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bw.RunWorkerCompleted += bw_RunWorkerCompleted;
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bw.WorkerReportsProgress = true;
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bw.WorkerSupportsCancellation = true;
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}
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private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
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{
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if (FileCheckProgressChanged != null)
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{
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FileCheckProgressChanged((float)e.UserState);
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}
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}
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private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
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{
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IsWorking = false;
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if (FileCheckCompleted != null)
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{
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string result = string.Empty;
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if (!e.Cancelled)
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{
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result = (string)e.Result;
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}
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FileCheckCompleted(result, e.Cancelled);
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}
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}
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public bool Start(string filePath, HashType hashType)
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{
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FilePath = filePath;
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HashType = hashType;
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if (!IsWorking && !string.IsNullOrEmpty(FilePath) && File.Exists(FilePath))
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{
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IsWorking = true;
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bw.RunWorkerAsync();
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return true;
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}
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return false;
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}
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public void Stop()
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{
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bw.CancelAsync();
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}
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private void CheckThread(object sender, DoWorkEventArgs e)
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{
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using (FileStream stream = new FileStream(FilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
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using (HashAlgorithm hash = GetHashAlgorithm(HashType))
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using (CryptoStream cs = new CryptoStream(stream, hash, CryptoStreamMode.Read))
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{
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long bytesRead, totalRead = 0;
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byte[] buffer = new byte[8192];
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Stopwatch timer = Stopwatch.StartNew();
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while ((bytesRead = cs.Read(buffer, 0, buffer.Length)) > 0 && !bw.CancellationPending)
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{
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totalRead += bytesRead;
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if (timer.ElapsedMilliseconds > 200)
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{
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float progress = (float)totalRead / stream.Length * 100;
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bw.ReportProgress(0, progress);
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timer.Reset();
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timer.Start();
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}
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}
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if (bw.CancellationPending)
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{
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bw.ReportProgress(0, 0f);
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e.Cancel = true;
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}
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else
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{
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bw.ReportProgress(0, 100f);
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string[] hex = TranslatorHelper.BytesToHexadecimal(hash.Hash);
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e.Result = string.Concat(hex);
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}
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}
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}
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public static HashAlgorithm GetHashAlgorithm(HashType hashType)
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{
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switch (hashType)
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{
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case HashType.CRC32:
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return new Crc32();
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case HashType.MD5:
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return new MD5CryptoServiceProvider();
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case HashType.SHA1:
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return new SHA1CryptoServiceProvider();
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case HashType.SHA256:
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return new SHA256CryptoServiceProvider();
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case HashType.SHA384:
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return new SHA384CryptoServiceProvider();
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case HashType.SHA512:
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return new SHA512CryptoServiceProvider();
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case HashType.RIPEMD160:
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return new RIPEMD160Managed();
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}
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return null;
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}
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}
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} |