加密和解密

来源：互联网发布：怎样成为程序员编辑：程序博客网时间：2024/06/05 05:15

方法一：

public class DESC    {        const string KEY_64 = "VavicApp";//注意了，是8个字符，64位        const string IV_64 = "VavicApp";        public static string Encode(string data)        {            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();            int i = cryptoProvider.KeySize;            MemoryStream ms = new MemoryStream();            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey,byIV), CryptoStreamMode.Write);            StreamWriter sw = new StreamWriter(cst);            sw.Write(data);            sw.Flush();            cst.FlushFinalBlock();            sw.Flush();            return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);        }        public static string Decode(string data)        {            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);            byte[] byEnc;            try            {                byEnc = Convert.FromBase64String(data);            }            catch            {                return null;            }            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();            MemoryStream ms = new MemoryStream(byEnc);            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey,byIV), CryptoStreamMode.Read);            StreamReader sr = new StreamReader(cst);            return sr.ReadToEnd();        }    }

方法二：

public class DESC    {        const string KEY_64 = "VavicApp";//注意了，是8个字符，64位        const string IV_64 = "VavicApp";        public static string Encode(string data)        {            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();            int i = cryptoProvider.KeySize;            MemoryStream ms = new MemoryStream();            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey,byIV), CryptoStreamMode.Write);            StreamWriter sw = new StreamWriter(cst);            sw.Write(data);            sw.Flush();            cst.FlushFinalBlock();            sw.Flush();            return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);        }        public static string Decode(string data)        {            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);            byte[] byEnc;            try            {                byEnc = Convert.FromBase64String(data);            }            catch            {                return null;            }            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();            MemoryStream ms = new MemoryStream(byEnc);            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey,byIV), CryptoStreamMode.Read);            StreamReader sr = new StreamReader(cst);            return sr.ReadToEnd();        }    }