【.NET】.NET加密与解密C#

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1、加密

public class Encrypts{///   <summary> ///   构造方法 ///   </summary> public Encrypts(){}///   <summary> ///   使用缺省密钥字符串加密 ///   </summary> ///   <param   name= "original "> 明文 </param> ///   <returns> 密文 </returns> public static string Encrypt(string original){return Encrypt(original, "haha");}///   <summary> ///   使用缺省密钥解密 ///   </summary> ///   <param   name= "original "> 密文 </param> ///   <returns> 明文 </returns> public static string Decrypt(string original){try{return Decrypt(original, "haha", System.Text.Encoding.Default);}catch{return ("");}}///   <summary> ///   使用给定密钥解密 ///   </summary> ///   <param   name= "original "> 密文 </param> ///   <param   name= "key "> 密钥 </param> ///   <returns> 明文 </returns> public static string Decrypt(string original, string key){return Decrypt(original, key, System.Text.Encoding.Default);}///   <summary> ///   使用缺省密钥解密,返回指定编码方式明文 ///   </summary> ///   <param   name= "original "> 密文 </param> ///   <param   name= "encoding "> 编码方式 </param> ///   <returns> 明文 </returns> public static string Decrypt(string original, Encoding encoding){return Decrypt(original, "haha", encoding);}///   <summary> ///   使用给定密钥加密 ///   </summary> ///   <param   name= "original "> 原始文字 </param> ///   <param   name= "key "> 密钥 </param> ///   <param   name= "encoding "> 字符编码方案 </param> ///   <returns> 密文 </returns> public static string Encrypt(string original, string key){byte[] buff = System.Text.Encoding.Default.GetBytes(original);byte[] kb = System.Text.Encoding.Default.GetBytes(key);return Convert.ToBase64String(Encrypt(buff, kb));}///   <summary> ///   使用给定密钥解密 ///   </summary> ///   <param   name= "encrypted "> 密文 </param> ///   <param   name= "key "> 密钥 </param> ///   <param   name= "encoding "> 字符编码方案 </param> ///   <returns> 明文 </returns> public static string Decrypt(string encrypted, string key, Encoding encoding){byte[] buff = Convert.FromBase64String(encrypted);byte[] kb = System.Text.Encoding.Default.GetBytes(key);return encoding.GetString(Decrypt(buff, kb));}///   <summary> ///   生成MD5摘要 ///   </summary> ///   <param   name= "original "> 数据源 </param> ///   <returns> 摘要 </returns> public static byte[] MakeMD5(byte[] original){MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();byte[] keyhash = hashmd5.ComputeHash(original);hashmd5 = null;return keyhash;}///   <summary> ///   使用给定密钥加密 ///   </summary> ///   <param   name= "original "> 明文 </param> ///   <param   name= "key "> 密钥 </param> ///   <returns> 密文 </returns> public static byte[] Encrypt(byte[] original, byte[] key){TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();des.Key = MakeMD5(key);des.Mode = CipherMode.ECB;return des.CreateEncryptor().TransformFinalBlock(original, 0, original.Length);}///   <summary> ///   使用给定密钥解密数据 ///   </summary> ///   <param   name= "encrypted "> 密文 </param> ///   <param   name= "key "> 密钥 </param> ///   <returns> 明文 </returns> public static byte[] Decrypt(byte[] encrypted, byte[] key){TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();des.Key = MakeMD5(key);des.Mode = CipherMode.ECB;return des.CreateDecryptor().TransformFinalBlock(encrypted, 0, encrypted.Length);}///   <summary> ///   使用给定密钥加密 ///   </summary> ///   <param   name= "original "> 原始数据 </param> ///   <param   name= "key "> 密钥 </param> ///   <returns> 密文 </returns> public static byte[] Encrypt(byte[] original){byte[] key = System.Text.Encoding.Default.GetBytes("haha");return Encrypt(original, key);}///   <summary> ///   使用缺省密钥解密数据 ///   </summary> ///   <param   name= "encrypted "> 密文 </param> ///   <param   name= "key "> 密钥 </param> ///   <returns> 明文 </returns> public static byte[] Decrypt(byte[] encrypted){byte[] key = System.Text.Encoding.Default.GetBytes("haha");return Decrypt(encrypted, key);}}

2、解密

public class EncryDecry{#region 加密/// <summary>/// 加密/// </summary>/// <param name="data">明文</param>/// <param name="Key_64">Key_64 长度8位</param>/// <param name="Iv_64">Key_64 长度8位</param>/// <returns></returns>public static string Encrypt(string data, string Key_64, string Iv_64){string KEY_64 = Key_64;// "12345678";string IV_64 = Iv_64;// "12345678";try{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);}catch (Exception x){return x.Message;}}#endregion#region 解密/// <summary>/// 解密/// </summary>/// <param name="data">密文</param>/// <param name="Key_64">Key_64 长度8位</param>/// <param name="Iv_64">Key_64 长度8位</param>/// <returns></returns>public static string Decrypt(string data, string Key_64, string Iv_64){string KEY_64 = Key_64;// "12345678";密钥string IV_64 = Iv_64;// "12345678"; 向量try{byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);byte[] byEnc;byEnc = Convert.FromBase64String(data); //把需要解密的字符串转为8位无符号数组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();}catch (Exception x){return x.Message;}}#endregion}