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32 lines
1.0 KiB
32 lines
1.0 KiB
using System;
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using System.Collections.Generic;
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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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namespace ReportTemplateTool.Helper
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{
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public class DesHelper
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{
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public static string DesDecrypt(string data)
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{
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byte[] bytes = Encoding.ASCII.GetBytes("Lis2021W");
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byte[] bytes2 = Encoding.ASCII.GetBytes("xbd2021W");
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byte[] buffer;
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try
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{
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buffer = Convert.FromBase64String(data);
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}
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catch
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{
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return null;
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}
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DESCryptoServiceProvider dESCryptoServiceProvider = new DESCryptoServiceProvider();
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MemoryStream stream = new MemoryStream(buffer);
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CryptoStream stream2 = new CryptoStream(stream, ((SymmetricAlgorithm)(object)dESCryptoServiceProvider).CreateDecryptor(bytes, bytes2), CryptoStreamMode.Read);
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StreamReader streamReader = new StreamReader(stream2);
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return streamReader.ReadToEnd();
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}
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}
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}
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