using System; using System.Security.Cryptography; using System.Text; using System.IO; /// <summary> /// DES加密/解密类。 /// </summary> public class DESEncryptEx1 { #region ========加密======== /// <summary> /// 加密 /// </summary> /// <param name="pToEncrypt">要加密的内容</param> /// <param name="sKey">密钥</param> /// <returns>返回加密后的字符串</returns> public static string Encrypt(string pToEncrypt, string sKey) { //访问数据加密标准(DES)算法的加密服务提供程序 (CSP) 版本的包装对象 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Mode = CipherMode.ECB; des.Padding = PaddingMode.PKCS7; des.Key = Encoding.UTF8.GetBytes(sKey); //建立加密对象的密钥和偏移量 des.IV = Encoding.UTF8.GetBytes(sKey); //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 ||| 如果是用ECB模式,则IV不管是什么都不会影响加密/解密的结果 byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);//把字符串放到byte数组中 MemoryStream ms = new MemoryStream();//创建其支持存储区为内存的流 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);//定义将数据流链接到加密转换的流 cs.Write(inputByteArray, 0, inputByteArray.Length);//上面已经完成了把加密后的结果放到内存中去 cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); foreach (byte b in ms.ToArray()) { ret.AppendFormat("{0:X2}", b); } return ret.ToString(); } /// <summary> /// DES加密 /// </summary> /// <param name="pToEncrypt">要加密的内容</param> /// <param name="sKey">密钥</param> /// <param name="StrMs">输出加密后的字符串</param> /// <returns>加密后的byte数组</returns> public static byte[] Encrypt(string pToEncrypt, string sKey, out string StrMs) { //访问数据加密标准(DES)算法的加密服务提供程序 (CSP) 版本的包装对象 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Mode = CipherMode.ECB; des.Padding = PaddingMode.PKCS7; des.Key = Encoding.UTF8.GetBytes(sKey); //建立加密对象的密钥和偏移量 //des.IV = Encoding.UTF8.GetBytes(sKey); // 如果是用ECB模式,则IV不管是什么都不会影响加密/解密的结果 byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);//把字符串放到byte数组中 MemoryStream ms = new MemoryStream();//创建其支持存储区为内存的流 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);//定义将数据流链接到加密转换的流 cs.Write(inputByteArray, 0, inputByteArray.Length);//上面已经完成了把加密后的结果放到内存中去 cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); foreach (byte b in ms.ToArray()) { ret.AppendFormat("{0:X2}", b); } StrMs = ret.ToString(); return ms.ToArray(); } #endregion #region ========解密======== /// <summary> /// DEC 解密过程 /// </summary> /// <param name="pToDecrypt">被解密的字符串</param> /// <param name="sKey">密钥(只支持8个字节的密钥,同前面的加密密钥相同)</param> /// <returns>返回被解密的字符串</returns> public static string Decrypt(string pToDecrypt, string sKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Mode = CipherMode.ECB; des.Padding = PaddingMode.PKCS7; byte[] inputByteArray = new byte[pToDecrypt.Length / 2]; for (int x = 0; x < pToDecrypt.Length / 2; x++) { int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); inputByteArray[x] = (byte)i; } des.Key = Encoding.UTF8.GetBytes(sKey); //建立加密对象的密钥和偏移量,此值重要,不能修改 //des.IV = Encoding.UTF8.GetBytes(sKey);// 如果是用ECB模式,则IV不管是什么都不会影响加密/解密的结果 MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); return System.Text.Encoding.UTF8.GetString(ms.ToArray()); } /// <summary> /// 解密 /// </summary> /// <param name="EncryptedDataArray"></param> /// <param name="key"></param> /// <returns></returns> public static string DecryptTextFromMemory(byte[] EncryptedDataArray, string key) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = Encoding.UTF8.GetBytes(key); des.Padding = PaddingMode.PKCS7; des.Mode = CipherMode.ECB; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(EncryptedDataArray, 0, EncryptedDataArray.Length); cs.FlushFinalBlock(); ms.Close(); cs.Close(); return System.Text.Encoding.UTF8.GetString(ms.ToArray()); } #endregion /// <summary> /// 加密 /// </summary> /// <param name="strData">要加密的数据</param> /// <param name="strKey">密钥</param> /// <returns>返回Base64编码后的加密字符串</returns> public static string EncryptToBase64(string strData, string strKey) { string strRtn; try { DESCryptoServiceProvider desc = new DESCryptoServiceProvider();//des进行加密 desc.Mode = CipherMode.ECB; desc.Padding = PaddingMode.PKCS7; byte[] key = System.Text.Encoding.UTF8.GetBytes(strKey); byte[] data = System.Text.Encoding.UTF8.GetBytes(strData); MemoryStream ms = new MemoryStream();//存储加密后的数据 CryptoStream cs = new CryptoStream(ms, desc.CreateEncryptor(key, key), CryptoStreamMode.Write); cs.Write(data, 0, data.Length);//进行加密 cs.FlushFinalBlock(); //return System.Text.Encoding.UTF8.GetString(ms.ToArray());//取加密后的数据 strRtn = Convert.ToBase64String(ms.ToArray()); return strRtn; } catch { return ""; } } /// <summary> /// 解密 /// </summary> /// <param name="strData">要解密的数据</param> /// <param name="strKey">密钥</param> /// <returns></returns> public static string DecryptFromBase64(string strData, string strKey) { string strRtn; try { DESCryptoServiceProvider desc = new DESCryptoServiceProvider(); desc.Mode = CipherMode.ECB; desc.Padding = PaddingMode.PKCS7; byte[] key = System.Text.Encoding.UTF8.GetBytes(strKey); //byte[] data = System.Text.Encoding.UTF8.GetBytes(strData); byte[] rdata = Convert.FromBase64String(strData); MemoryStream ms = new MemoryStream();//存储解密后的数据 CryptoStream cs = new CryptoStream(ms, desc.CreateDecryptor(key, key), CryptoStreamMode.Write); cs.Write(rdata, 0, rdata.Length);//解密数据 cs.FlushFinalBlock(); strRtn = System.Text.Encoding.UTF8.GetString(ms.ToArray()); return strRtn; } catch { return ""; } } } /// <summary> /// AES加解密工具类 /// </summary> public class DESAESEncrypt { #region AES加密 /// <summary> /// AES加密 /// </summary> /// <param name="toEncrypt">要加密的内容</param> /// <param name="strKey">密钥(16或者32位)</param> /// <returns>Base64转码后的密文</returns> public static string Encrypt(string toEncrypt, string strKey) { byte[] keyArray = UTF8Encoding.UTF8.GetBytes(strKey); byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt); RijndaelManaged rDel = new RijndaelManaged();//using System.Security.Cryptography; rDel.Key = keyArray; rDel.Mode = CipherMode.ECB;//using System.Security.Cryptography; rDel.Padding = PaddingMode.PKCS7;//using System.Security.Cryptography; ICryptoTransform cTransform = rDel.CreateEncryptor();//using System.Security.Cryptography; byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length); } #endregion AES加密 #region AES解密 /// <summary> /// AES解密 /// </summary> /// <param name="toDecrypt">要解密的内容</param> /// <param name="strKey">密钥(16或者32位)</param> /// <returns>解密后的明文</returns> public static string Decrypt(string toDecrypt, string strKey) { byte[] keyArray = UTF8Encoding.UTF8.GetBytes(strKey); byte[] toEncryptArray = Convert.FromBase64String(toDecrypt); RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = keyArray; rDel.Mode = CipherMode.ECB; rDel.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = rDel.CreateDecryptor(); byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return UTF8Encoding.UTF8.GetString(resultArray); } #endregion AES解密 }