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  • C# DES加密解密

     /// <summary>
            /// 使用配置中的KEY,进行DES加密。
            /// </summary>
            /// <param name="pToEncrypt">要加密的字符串。</param>
            /// <returns>以Base64格式返回的加密字符串。</returns>
            public static string Encrypt(string pToEncrypt)
            {
                return Encrypt(pToEncrypt, ConfigurationManager.AppSettings["DESKey"] ?? "88888888");
            }
    
            /// <summary>
            /// 使用配置中的KEY,进行DES解密。
            /// </summary>
            /// <param name="pToDecrypt">要解密的以Base64</param>
            /// <returns>已解密的字符串。</returns>
            public static string Decrypt(string pToDecrypt)
            {
                return Decrypt(pToDecrypt, ConfigurationManager.AppSettings["DESKey"] ?? "88888888");
            }
    
            /// <summary>
            /// 进行DES加密。
            /// </summary>
            /// <param name="pToEncrypt">要加密的字符串。</param>
            /// <param name="sKey">密钥,且必须为8位。</param>
            /// <returns>以Base64格式返回的加密字符串。</returns>
            public static string Encrypt(string pToEncrypt, string sKey)
            {
                using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
                {
                    byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
                    des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
                    des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
                    System.IO.MemoryStream ms = new System.IO.MemoryStream();
                    using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(inputByteArray, 0, inputByteArray.Length);
                        cs.FlushFinalBlock();
                        cs.Close();
                    }
                    string str = Convert.ToBase64String(ms.ToArray());
                    ms.Close();
                    return str;
                }
            }
    
            /**/
            /// <summary>
            /// 进行DES解密。
            /// </summary>
            /// <param name="pToDecrypt">要解密的以Base64</param>
            /// <param name="sKey">密钥,且必须为8位。</param>
            /// <returns>已解密的字符串。</returns>
            public static string Decrypt(string pToDecrypt, string sKey)
            {
                byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
                using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
                {
                    des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
                    des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
                    System.IO.MemoryStream ms = new System.IO.MemoryStream();
                    using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(inputByteArray, 0, inputByteArray.Length);
                        cs.FlushFinalBlock();
                        cs.Close();
                    }
                    string str = Encoding.UTF8.GetString(ms.ToArray());
                    ms.Close();
                    return str;
                }
            }
        }
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  • 原文地址:https://www.cnblogs.com/yzeng/p/3891275.html
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