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91 lines
3.5 KiB
Plaintext
91 lines
3.5 KiB
Plaintext
9 months ago
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using System;
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using System.IO;
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using System.Data;
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using System.Web;
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using BP.Web;
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using BP.Sys;
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using System.Text;
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using System.Security.Cryptography;
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using BP.Difference;
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namespace BP.Tools
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{
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public class EncHelper
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{
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private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };//自定义密匙
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private static string encryptKey = "ccflow123";
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public static bool EncryptDES(string inFile, string outFile)
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{
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byte[] rgb = Keys;
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try
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{
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byte[] rgbKeys = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
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FileStream inFs = new FileStream(inFile, FileMode.Open, FileAccess.Read);//读入流
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FileStream outFs = new FileStream(outFile, FileMode.OpenOrCreate, FileAccess.Write);// 等待写入流
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outFs.SetLength(0);//帮助读写的变量
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byte[] byteIn = new byte[100];//放临时读入的流
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long readLen = 0;//读入流的长度
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long totalLen = inFs.Length;//读入流的总长度
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int everylen = 0;//每次读入流的长度
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DES des = new DESCryptoServiceProvider();//将inFile加密后放到outFile
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CryptoStream encStream = new CryptoStream(outFs, des.CreateEncryptor(rgb, rgbKeys), CryptoStreamMode.Write);
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while (readLen < totalLen)
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{
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everylen = inFs.Read(byteIn, 0, 100);
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encStream.Write(byteIn, 0, everylen);
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readLen = readLen + everylen;
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}
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encStream.Close();
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inFs.Close();
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outFs.Close();
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return true;//加密成功
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}
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catch (Exception ex)
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{
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HttpContextHelper.ResponseWrite(ex.Message.ToString());
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return false;//加密失败
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}
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}
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public static bool DecryptDES(string inFile, string outFile)
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{
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byte[] rgb = Keys;
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try
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{
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byte[] rgbKeys = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
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FileStream inFs = new FileStream(inFile, FileMode.Open, FileAccess.Read);//读入流
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FileStream outFs = new FileStream(outFile, FileMode.OpenOrCreate, FileAccess.Write);// 等待写入流
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outFs.SetLength(0);//帮助读写的变量
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byte[] byteIn = new byte[100];//放临时读入的流
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long readLen = 0;//读入流的长度
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long totalLen = inFs.Length;//读入流的总长度
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int everylen = 0;//每次读入流的长度
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DES des = new DESCryptoServiceProvider();//将inFile加密后放到outFile
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CryptoStream encStream = new CryptoStream(outFs, des.CreateDecryptor(rgb, rgbKeys), CryptoStreamMode.Write);
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while (readLen < totalLen)
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{
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everylen = inFs.Read(byteIn, 0, 100);
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encStream.Write(byteIn, 0, everylen);
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readLen = readLen + everylen;
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}
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encStream.Close();
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inFs.Close();
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outFs.Close();
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encStream.Dispose();
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inFs.Dispose();
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outFs.Dispose();
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return true;//加密成功
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}
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catch (Exception ex)
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{
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HttpContextHelper.ResponseWrite(ex.Message.ToString());
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return false;//加密失败
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}
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}
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}
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}
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