.net 加密与解密

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); } }

 

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 }

 

转载于:https://www.cnblogs.com/zoro-zero/p/4401561.html

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