C#加密解密
2011-09-22 19:09
155 查看
1、方法一 (不可逆加密)
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public string EncryptPassword(string PasswordString,string PasswordFormat )
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{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string encryptPassword = null;
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if (PasswordFormat="SHA1"){
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encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
,"SHA1");
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
elseif (PasswordFormat="MD5")
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{ encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
,"MD5");
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}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return encryptPassword ;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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2、方法二 (可逆加密)
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public interface IBindesh
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{
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string encode(string str);
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string decode(string str);
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
public class EncryptionDecryption : IBindesh
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{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string encode(string str)
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{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string htext = "";
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for ( int i = 0; i < str.Length; i++)
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{
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htext = htext + (char) (str[i] + 10 - 1 * 2);
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}
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return htext;
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}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string decode(string str)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string dtext = "";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
for ( int i=0; i < str.Length; i++)
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{
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dtext = dtext + (char) (str[i] - 10 + 1*2);
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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return dtext;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
3、方法三 (可逆加密)
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const string KEY_64 = "VavicApp";//注意了,是8个字符,64位
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const string IV_64 = "VavicApp";
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public string Encode(string data)
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{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
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int i = cryptoProvider.KeySize;
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MemoryStream ms = new MemoryStream();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byIV), CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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StreamWriter sw = new StreamWriter(cst);
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sw.Write(data);
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sw.Flush();
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cst.FlushFinalBlock();
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sw.Flush();
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return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
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}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string Decode(string data)
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{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byEnc;
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try
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{
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byEnc = 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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}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
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MemoryStream ms = new MemoryStream(byEnc);
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CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey,
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byIV), CryptoStreamMode.Read);
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StreamReader sr = new StreamReader(cst);
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return sr.ReadToEnd();
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}
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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4、MD5不可逆加密
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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(32位加密)
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public string GetMD5(string s, string _input_charset)
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{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <summary>
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/// 与ASP兼容的MD5加密算法
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/// </summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MD5 md5 = new MD5CryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
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StringBuilder sb = new StringBuilder(32);
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for (int i = 0; i < t.Length; i++)
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{
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sb.Append(t[i].ToString("x").PadLeft(2, '0'));
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}
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return sb.ToString();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
(16位加密)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public static string GetMd5Str(string ConvertString)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string t2 =
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
t2 = t2.Replace("-", "");
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return t2;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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5、加解文本文件
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//加密文件
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
private static void EncryptData(String inName, String outName, byte[] desKey, byte[]
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
desIV)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create the file streams to handle the input and output files.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.SetLength(0);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create variables to help with read and write.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long rdlen = 0; //This is the total number of bytes written.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long totlen = fin.Length; //This is the total length of the input file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
int len; //This is the number of bytes to be written at a time.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DES des = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV),
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Read from the input file, then encrypt and write to the output file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while (rdlen < totlen)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
len = fin.Read(bin, 0, 100);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Write(bin, 0, len);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rdlen = rdlen + len;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fin.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//解密文件
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
private static void DecryptData(String inName, String outName, byte[] desKey, byte[]
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
desIV)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create the file streams to handle the input and output files.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.SetLength(0);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create variables to help with read and write.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long rdlen = 0; //This is the total number of bytes written.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long totlen = fin.Length; //This is the total length of the input file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
int len; //This is the number of bytes to be written at a time.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DES des = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV),
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Read from the input file, then encrypt and write to the output file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while (rdlen < totlen)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
len = fin.Read(bin, 0, 100);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Write(bin, 0, len);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rdlen = rdlen + len;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fin.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6、
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.Collections.Generic;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.Text;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.Security.Cryptography;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.IO;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
namespace Component
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public class Security
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public Security()
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//默认密钥向量
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//**//**//// <summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// DES加密字符串
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="encryptString">待加密的字符串</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="encryptKey">加密密钥,要求为8位</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public static string EncryptDES(string encryptString, string encryptKey)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbIV = Keys;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MemoryStream mStream = new MemoryStream();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rgbIV), CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.Write(inputByteArray, 0, inputByteArray.Length);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.FlushFinalBlock();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Convert.ToBase64String(mStream.ToArray());
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return encryptString;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//**//**//// <summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// DES解密字符串
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="decryptString">待解密的字符串</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public static string DecryptDES(string decryptString, string decryptKey)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbIV = Keys;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] inputByteArray = Convert.FromBase64String(decryptString);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MemoryStream mStream = new MemoryStream();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rgbIV), CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.Write(inputByteArray, 0, inputByteArray.Length);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.FlushFinalBlock();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Encoding.UTF8.GetString(mStream.ToArray());
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return decryptString;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
public string EncryptPassword(string PasswordString,string PasswordFormat )
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string encryptPassword = null;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
if (PasswordFormat="SHA1"){
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
,"SHA1");
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
elseif (PasswordFormat="MD5")
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{ encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
,"MD5");
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return encryptPassword ;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
2、方法二 (可逆加密)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
public interface IBindesh
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string encode(string str);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string decode(string str);
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
public class EncryptionDecryption : IBindesh
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string encode(string str)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string htext = "";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
for ( int i = 0; i < str.Length; i++)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
htext = htext + (char) (str[i] + 10 - 1 * 2);
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return htext;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string decode(string str)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string dtext = "";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
for ( int i=0; i < str.Length; i++)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
dtext = dtext + (char) (str[i] - 10 + 1*2);
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return dtext;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
3、方法三 (可逆加密)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
const string KEY_64 = "VavicApp";//注意了,是8个字符,64位
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
const string IV_64 = "VavicApp";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string Encode(string data)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
int i = cryptoProvider.KeySize;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MemoryStream ms = new MemoryStream();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byIV), CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StreamWriter sw = new StreamWriter(cst);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Write(data);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Flush();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cst.FlushFinalBlock();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sw.Flush();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string Decode(string data)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byEnc;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byEnc = Convert.FromBase64String(data);
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return null;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MemoryStream ms = new MemoryStream(byEnc);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byIV), CryptoStreamMode.Read);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StreamReader sr = new StreamReader(cst);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return sr.ReadToEnd();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
4、MD5不可逆加密
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
(32位加密)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string GetMD5(string s, string _input_charset)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// 与ASP兼容的MD5加密算法
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// </summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MD5 md5 = new MD5CryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StringBuilder sb = new StringBuilder(32);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
for (int i = 0; i < t.Length; i++)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sb.Append(t[i].ToString("x").PadLeft(2, '0'));
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return sb.ToString();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
(16位加密)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public static string GetMd5Str(string ConvertString)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string t2 =
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
t2 = t2.Replace("-", "");
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return t2;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5、加解文本文件
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//加密文件
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
private static void EncryptData(String inName, String outName, byte[] desKey, byte[]
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
desIV)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create the file streams to handle the input and output files.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.SetLength(0);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create variables to help with read and write.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long rdlen = 0; //This is the total number of bytes written.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long totlen = fin.Length; //This is the total length of the input file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
int len; //This is the number of bytes to be written at a time.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DES des = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV),
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Read from the input file, then encrypt and write to the output file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while (rdlen < totlen)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
len = fin.Read(bin, 0, 100);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Write(bin, 0, len);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rdlen = rdlen + len;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fin.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//解密文件
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
private static void DecryptData(String inName, String outName, byte[] desKey, byte[]
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
desIV)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create the file streams to handle the input and output files.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.SetLength(0);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Create variables to help with read and write.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long rdlen = 0; //This is the total number of bytes written.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
long totlen = fin.Length; //This is the total length of the input file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
int len; //This is the number of bytes to be written at a time.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DES des = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV),
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//Read from the input file, then encrypt and write to the output file.
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while (rdlen < totlen)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
len = fin.Read(bin, 0, 100);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Write(bin, 0, len);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rdlen = rdlen + len;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
encStream.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fout.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
fin.Close();
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6、
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.Collections.Generic;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.Text;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.Security.Cryptography;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
using System.IO;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
namespace Component
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public class Security
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public Security()
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//默认密钥向量
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//**//**//// <summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// DES加密字符串
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="encryptString">待加密的字符串</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="encryptKey">加密密钥,要求为8位</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public static string EncryptDES(string encryptString, string encryptKey)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbIV = Keys;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MemoryStream mStream = new MemoryStream();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rgbIV), CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.Write(inputByteArray, 0, inputByteArray.Length);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.FlushFinalBlock();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Convert.ToBase64String(mStream.ToArray());
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return encryptString;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//**//**//// <summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// DES解密字符串
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="decryptString">待解密的字符串</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public static string DecryptDES(string decryptString, string decryptKey)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] rgbIV = Keys;
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] inputByteArray = Convert.FromBase64String(decryptString);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
MemoryStream mStream = new MemoryStream();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey,
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
rgbIV), CryptoStreamMode.Write);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.Write(inputByteArray, 0, inputByteArray.Length);
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
cStream.FlushFinalBlock();
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Encoding.UTF8.GetString(mStream.ToArray());
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return decryptString;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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