c# 几种常见的加密方法的实现

这篇文章主要介绍了c# 几种常见的加密方法的实现，帮助你们更好的理解和使用c#，感兴趣的朋友能够了解下

1.ACSII码加密

 1 //ACSII码加密
 2     private static string ACSIIPWd(string rpwd)
 3     {
 4       string Ret;
 5       byte[] array = System.Text.Encoding.ASCII.GetBytes(rpwd);
 6       byte[] byteArray = new byte[array.Length];
 7 
 8       for (int i = 0; i < array.Length; i++)
 9       {
10         int asciicode = (int)(array[i]);
11         asciicode = asciicode + 1;
12         byteArray[i] = (byte)asciicode;
13       }
14       System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
15       string strCharacter = asciiEncoding.GetString(byteArray);
16       Ret = strCharacter;
17       return Ret;
18     }

2.MD5加密

 1 //MD5加密
 2     private static string MD5PWd(string rpwd)
 3     {
 4       string Ret;
 5 
 6       MD5 md5 = new MD5CryptoServiceProvider();
 7       byte[] palindata = Encoding.Default.GetBytes(rpwd);//将要加密的字符串转换为字节数组
 8       byte[] encryptdata = md5.ComputeHash(palindata);//将字符串加密后也转换为字符数组
 9       Ret = Convert.ToBase64String(encryptdata);
10       return Ret;
11     }

3.RSA加密

 1 //RSA加密
 2     private static string RSAPWD1(string myKeyContainerName)
 3     {
 4       string ret = "";     
 5       CspParameters cp = new CspParameters();
 6       cp.KeyContainerName = myKeyContainerName;
 7       RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);
 8       
 9       ret = rsa.ToXmlString(true);
10       Console.WriteLine("Key is : \n" + rsa.ToXmlString(true));
11       return ret;
12 
13     }

4.DES加密

 1 //DES加密 
 2     private static string DESPWD(string ciphertext)
 3     {
 4       string desPWD = ""; 
 5       byte[] buffer;
 6       DESCryptoServiceProvider DesCSP = new DESCryptoServiceProvider();
 7 
 8       MemoryStream ms = new MemoryStream();//先建立 一个内存流
 9       CryptoStream cryStream = new CryptoStream(ms, DesCSP.CreateEncryptor(), CryptoStreamMode.Write);//将内存流链接到加密转换流
10       StreamWriter sw = new StreamWriter(cryStream);
11       sw.WriteLine(ciphertext);//将要加密的字符串写入加密转换流
12       sw.Close();
13       cryStream.Close();
14       buffer = ms.ToArray();//将加密后的流转换为字节数组
15       desPWD = Convert.ToBase64String(buffer);//将加密后的字节数组转换为字符串
16 
17       return desPWD;
18     }