79 lines
2.7 KiB
C#
79 lines
2.7 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Configuration;
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using System.Security.Cryptography;
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using System.IO;
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using System.ComponentModel;
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using Microsoft.VisualBasic;
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namespace Helper
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{
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public class Encrytp
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{
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public String GBPassword = ConfigurationManager.AppSettings["GBPassword"].ToString();
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public String LOGeneraKey = ConfigurationManager.AppSettings["LOGeneraKey"].ToString();
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/// <summary>
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///
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/// </summary>
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/// <param name="InputString"></param>
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/// <param name="SecretKey"></param>
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/// <param name="CyphMode"></param>
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/// <returns></returns>
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public String DecryptString(String InputString, CipherMode CyphMode = CipherMode.ECB)
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{
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String SecretKey = LOGeneraKey;
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if (InputString == string.Empty)
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{
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return "";
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}
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else
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{
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TripleDESCryptoServiceProvider Des = new TripleDESCryptoServiceProvider();
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byte[] InputbyteArray = new byte[Convert.ToInt32(InputString.Length / 2 - 1) + 1];
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MD5CryptoServiceProvider hashMD5 = new MD5CryptoServiceProvider();
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Des.Key = hashMD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(SecretKey));
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Des.Mode = CyphMode;
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//Put the input string into the byte array
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int X = 0;
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for (X = 0; X <= InputbyteArray.Length - 1; X++)
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{
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Int32 IJ = (Convert.ToInt32(InputString.Substring(X * 2, 2), 16));
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ByteConverter BT = new ByteConverter();
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InputbyteArray[X] = new byte();
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InputbyteArray[X] = Convert.ToByte(BT.ConvertTo(IJ, typeof(byte)));
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}
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MemoryStream ms = new MemoryStream();
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CryptoStream cs = new CryptoStream(ms, Des.CreateDecryptor(), CryptoStreamMode.Write);
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//Flush the data through the crypto stream into the memory stream
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cs.Write(InputbyteArray, 0, InputbyteArray.Length);
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cs.FlushFinalBlock();
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////Get the decrypted data back from the memory stream
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StringBuilder ret = new StringBuilder();
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byte[] B = ms.ToArray();
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ms.Close();
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int I = 0;
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for (I = 0; I <= Information.UBound(B); I++)
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{
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ret.Append(Strings.Chr(B[I]));
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}
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return ret.ToString();
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}
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}
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}
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}
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