93 lines
2.5 KiB
C#
93 lines
2.5 KiB
C#
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#define DEBUG
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using System;
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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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using System.Text;
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using System.Xml;
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using Aitex.Core.RT.Log;
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namespace Aitex.Core.Util
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{
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public static class FileSigner
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{
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public static bool IsValid(string fileName)
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{
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bool result = false;
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try
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{
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XmlDocument xmlDocument = new XmlDocument();
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xmlDocument.Load(fileName);
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Debug.Assert(xmlDocument != null && xmlDocument.DocumentElement != null);
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XmlElement documentElement = xmlDocument.DocumentElement;
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XmlElement xmlElement = documentElement["Signature"];
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if (xmlElement == null)
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{
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return false;
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}
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documentElement.RemoveChild(xmlElement);
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UnicodeEncoding unicodeEncoding = new UnicodeEncoding();
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SHA1CryptoServiceProvider sHA1CryptoServiceProvider = new SHA1CryptoServiceProvider();
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byte[] inArray = sHA1CryptoServiceProvider.ComputeHash(unicodeEncoding.GetBytes(documentElement.InnerXml));
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string text = Convert.ToBase64String(inArray);
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documentElement.AppendChild(xmlElement);
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if (xmlElement.InnerText == text)
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{
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result = true;
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}
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}
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catch (Exception ex)
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{
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result = false;
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LOG.Write(ex);
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throw;
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}
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finally
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{
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}
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return result;
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}
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public static void Sign(string fileName)
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{
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try
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{
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XmlDocument xmlDocument = new XmlDocument();
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bool flag = true;
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if (File.Exists(fileName) && (File.GetAttributes(fileName) & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
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{
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flag = false;
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File.SetAttributes(fileName, FileAttributes.Normal);
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}
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xmlDocument.Load(fileName);
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XmlElement documentElement = xmlDocument.DocumentElement;
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XmlElement xmlElement = documentElement["Signature"];
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if (xmlElement != null)
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{
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documentElement.RemoveChild(xmlElement);
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}
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UnicodeEncoding unicodeEncoding = new UnicodeEncoding();
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SHA1CryptoServiceProvider sHA1CryptoServiceProvider = new SHA1CryptoServiceProvider();
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byte[] inArray = sHA1CryptoServiceProvider.ComputeHash(unicodeEncoding.GetBytes(documentElement.InnerXml));
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string innerText = Convert.ToBase64String(inArray);
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xmlElement = xmlDocument.CreateElement("Signature");
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xmlElement.InnerText = innerText;
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documentElement.AppendChild(xmlElement);
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xmlDocument.Save(fileName);
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if (!flag)
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{
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File.SetAttributes(fileName, FileAttributes.ReadOnly);
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}
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}
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catch (Exception ex)
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{
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LOG.Write(ex);
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throw;
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}
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finally
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{
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}
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}
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}
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}
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