700字范文 > Delphi调用C#的加密解密（Base64/AES/DES/MD5可扩充）

Delphi调用C#的加密解密（Base64/AES/DES/MD5可扩充）

时间：2023-07-02 09:27:43

1. 背景：

近期，由于工作上与第三方公司传输数据的时候需要采取数据加密，但是我们采用的时较低版本的Delphi 6；由于加密算法等差异，导致在传输的加密数据第三方一致解析不了（具体问题表现为base64加密中文乱码，AES加密方式的运算模式Mode，填充模式padding）；限于代码的管理规范不能使用加密的插件，且网上搜索相关的delphi加密资料少之又少；故决定采取Visual Studio来写加密解密算法的动态库，由Delphi调用。

2. 行动：

（1）C#端的代码实现，首先在vs中创建一个“类库”项目TestDll：

using System.Runtime.InteropServices;namespace TestDll{public interface ITestClass{void YourProcedure(stirng param1);}[ClassInterface(ClassInterfaceType.None)]public classTestClass:ITestClass{public void YourProcedure(stirng param1);{ //自己的代码 }} }

（2）C#端的配置实现：

a.选中该项目右击，选择【属性】，然后在【应用程序】中选择【程序集信息】如图：

b.同样是选中该项目右击，选择【属性】，然后在【生成】中选择【为COM互操作注册】保存，如图：

c.接下来是dll的注册，可以采用cmd命令框，也可以采用Bat文件：

（3）接下来是Delphi端的实现，Delphi程序调用此Dll方式有两种：

a.打开vs自带的工具“Visual Studio命令提示”，输入 TlbExp 路径\TestClass.dll 得到一个TestClass.tlb 文件(这个文件其实在编译的时候就会生成，可不做)。打开Delphi，选择“Project”–“import type library”找到刚才的TestClass.tlb,点击 CreateUnit，向delphi中引入一个com接口。

delphi 调用代码如下：

var aClass:TestClass;beginaClass := CoTestClass.Create;aClass.YourProcedure('参数');end;

b.不需生成tlb文件，仿照调用Excel的方式。代码如下：

var aClass: Variant;beginaClass:= CreateOleObject('TestDll.TestClass');aClass.YourProcedure('参数');end;

以上两种方法都可以调用成功，其中调用regasm.exe向系统注册dll是必需的。第一种方法需要生成tlb文件，并引入delphi中，操作繁琐，但可以看到接口的定义。第二种方法操作简单，但看不到接口的定义。

AES加解密code：

using System;using System.Collections.Generic;using System.Linq;using System.Runtime.InteropServices;using System.Security.Cryptography;using System.Text;using System.Threading.Tasks;namespace Encryption{public interface IAES{string AesEncrypt(string value, string key, int mode, int paddingMode, string iv = "");string AesDecrypt(string value, string key, int mode, int paddingMode, string iv = "");}[ClassInterface(ClassInterfaceType.None)]public class AES : IAES{/// <summary>/// AES加密/// </summary>/// <param name="value">待加密的字符串</param>/// <param name="key">秘钥（16，24，32位）</param>/// <param name="mode">运算模式（CBC = 1，ECB = 2，OFB = 3，CFB = 4，CTS = 5）</param>/// <param name="paddingMode">填充模式（None = 1,PKCS7 = 2,Zeros = 3,ANSIX923 = 4,ISO10126 = 5）/// <param name="iv">初始化向量（至少16位）</param>/// <returns>加密后的字符串</returns>public string AesEncrypt(string value, string key, int mode, int paddingMode, string iv = ""){if (string.IsNullOrEmpty(value)) return string.Empty;if (key == null) throw new Exception("未将对象引用设置到对象的实例。");if (key.Length < 16) throw new Exception("指定的密钥长度不能少于16位。");if (key.Length > 32) throw new Exception("指定的密钥长度不能多于32位。");if (key.Length != 16 && key.Length != 24 && key.Length != 32) throw new Exception("指定的密钥长度不明确。");if (!string.IsNullOrEmpty(iv)){if (iv.Length < 16) throw new Exception("指定的向量长度不能少于16位。");}var _keyByte = Encoding.UTF8.GetBytes(key);var _valueByte = Encoding.UTF8.GetBytes(value);using (var aes = new RijndaelManaged()){aes.IV = !string.IsNullOrEmpty(iv) ? Encoding.UTF8.GetBytes(iv) : Encoding.UTF8.GetBytes(key.Substring(0, 16));aes.Key = _keyByte;switch(mode) {case 1:aes.Mode = CipherMode.CBC;break;case 2:aes.Mode = CipherMode.ECB;break;case 3:aes.Mode = CipherMode.OFB;break;case 4:aes.Mode = CipherMode.CFB;break;case 5:aes.Mode = CipherMode.CTS;break;default:aes.Mode = CipherMode.CBC;break;}switch (paddingMode){case 1:aes.Padding = PaddingMode.None;break;case 2:aes.Padding = PaddingMode.PKCS7;break;case 3:aes.Padding = PaddingMode.Zeros;break;case 4:aes.Padding = PaddingMode.ANSIX923;break;case 5:aes.Padding = PaddingMode.ISO10126;break;default:aes.Padding = PaddingMode.PKCS7;break;}var cryptoTransform = aes.CreateEncryptor();var resultArray = cryptoTransform.TransformFinalBlock(_valueByte, 0, _valueByte.Length);return Convert.ToBase64String(resultArray, 0, resultArray.Length);}}/// <summary>/// AES解密/// </summary>/// <param name="value">待解密的字符串</param>/// <param name="key">秘钥（16，24，32位）</param>/// <param name="mode">运算模式（CBC = 1，ECB = 2，OFB = 3，CFB = 4，CTS = 5）</param>/// <param name="paddingMode">填充模式（None = 1,PKCS7 = 2,Zeros = 3,ANSIX923 = 4,ISO10126 = 5）/// <param name="iv">初始化向量（至少16位）</param>/// <returns>解密后的字符串</returns>public string AesDecrypt(string value, string key, int mode, int paddingMode, string iv = ""){if (string.IsNullOrEmpty(value)) return string.Empty;if (key == null) throw new Exception("未将对象引用设置到对象的实例。");if (key.Length < 16) throw new Exception("指定的密钥长度不能少于16位。");if (key.Length > 32) throw new Exception("指定的密钥长度不能多于32位。");if (key.Length != 16 && key.Length != 24 && key.Length != 32) throw new Exception("指定的密钥长度不明确。");if (!string.IsNullOrEmpty(iv)){if (iv.Length < 16) throw new Exception("指定的向量长度不能少于16位。");}var _keyByte = Encoding.UTF8.GetBytes(key);var _valueByte = Convert.FromBase64String(value);using (var aes = new RijndaelManaged()){aes.IV = !string.IsNullOrEmpty(iv) ? Encoding.UTF8.GetBytes(iv) : Encoding.UTF8.GetBytes(key.Substring(0, 16));aes.Key = _keyByte;switch (mode){case 1:aes.Mode = CipherMode.CBC;break;case 2:aes.Mode = CipherMode.ECB;break;case 3:aes.Mode = CipherMode.OFB;break;case 4:aes.Mode = CipherMode.CFB;break;case 5:aes.Mode = CipherMode.CTS;break;default:aes.Mode = CipherMode.CBC;break;}switch (paddingMode){case 1:aes.Padding = PaddingMode.None;break;case 2:aes.Padding = PaddingMode.PKCS7;break;case 3:aes.Padding = PaddingMode.Zeros;break;case 4:aes.Padding = PaddingMode.ANSIX923;break;case 5:aes.Padding = PaddingMode.ISO10126;break;default:aes.Padding = PaddingMode.PKCS7;break;} var cryptoTransform = aes.CreateDecryptor();var resultArray = cryptoTransform.TransformFinalBlock(_valueByte, 0, _valueByte.Length);return Encoding.UTF8.GetString(resultArray);}}}}

Base64加解密code：

using System;using System.Collections.Generic;using System.Linq;using System.Runtime.InteropServices;using System.Text;using System.Threading.Tasks;namespace Encryption{public interface IBase64{string UnBase64String(string value);string ToBase64String(string value);}[ClassInterface(ClassInterfaceType.None)]public class Base64 : IBase64{ public string UnBase64String(string value){if (value == null || value == ""){return "";}byte[] bytes = Convert.FromBase64String(value);return Encoding.UTF8.GetString(bytes);}public string ToBase64String(string value){if (value == null || value == ""){return "";}byte[] bytes = Encoding.UTF8.GetBytes(value);return Convert.ToBase64String(bytes);}}}

DES加解密code：

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Security.Cryptography;using System.Text;using System.Threading.Tasks;namespace Encryption{interface IDES{string Encrypt(string entryStr, string key, int mode, int paddingMode);string Decrypt(string entryStr, string key, int mode, int paddingMode);}public class DES:IDES{/// <summary>/// DES 加密/// </summary>/// <param name="entryStr">待加密字符串</param>/// <param name="key">8位16进制密钥字符串</param>/// <param name="mode">运算模式（CBC = 1，ECB = 2，OFB = 3，CFB = 4，CTS = 5）</param>/// <param name="paddingMode">填充模式（None = 1,PKCS7 = 2,Zeros = 3,ANSIX923 = 4,ISO10126 = 5）/// <returns></returns>public string Encrypt(string entryStr, string key, int mode, int paddingMode){DESCryptoServiceProvider des = new DESCryptoServiceProvider();switch (mode){case 1:des.Mode = CipherMode.CBC;break;case 2:des.Mode = CipherMode.ECB;break;case 3:des.Mode = CipherMode.OFB;break;case 4:des.Mode = CipherMode.CFB;break;case 5:des.Mode = CipherMode.CTS;break;default:des.Mode = CipherMode.ECB;break;}switch (paddingMode){case 1:des.Padding = PaddingMode.None;break;case 2:des.Padding = PaddingMode.PKCS7;break;case 3:des.Padding = PaddingMode.Zeros;break;case 4:des.Padding = PaddingMode.ANSIX923;break;case 5:des.Padding = PaddingMode.ISO10126;break;default:des.Padding = PaddingMode.Zeros;break;}var _keyByte = Encoding.UTF8.GetBytes(key);var _valueByte = Encoding.UTF8.GetBytes(entryStr);des.Key = _keyByte;using (MemoryStream ms = new MemoryStream()){byte[] bytes = _valueByte;using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write)){cs.Write(bytes, 0, bytes.Count());cs.FlushFinalBlock();}return System.Text.Encoding.Default.GetString(ms.ToArray()); }}/// <summary>/// DES 解密 /// </summary>/// <param name="bytes">待解密加密的字符串</param>/// <param name="key">8位16进制密钥字符串</param>/// <param name="mode">运算模式（CBC = 1，ECB = 2，OFB = 3，CFB = 4，CTS = 5）</param>/// <param name="paddingMode">填充模式（None = 1,PKCS7 = 2,Zeros = 3,ANSIX923 = 4,ISO10126 = 5）/// <returns></returns>public string Decrypt(string entryStr, string key, int mode, int paddingMode){DESCryptoServiceProvider des = new DESCryptoServiceProvider();switch (mode){case 1:des.Mode = CipherMode.CBC;break;case 2:des.Mode = CipherMode.ECB;break;case 3:des.Mode = CipherMode.OFB;break;case 4:des.Mode = CipherMode.CFB;break;case 5:des.Mode = CipherMode.CTS;break;default:des.Mode = CipherMode.ECB;break;}switch (paddingMode){case 1:des.Padding = PaddingMode.None;break;case 2:des.Padding = PaddingMode.PKCS7;break;case 3:des.Padding = PaddingMode.Zeros;break;case 4:des.Padding = PaddingMode.ANSIX923;break;case 5:des.Padding = PaddingMode.ISO10126;break;default:des.Padding = PaddingMode.Zeros;break;}var _keyByte = Encoding.UTF8.GetBytes(key);var _valueByte = Encoding.UTF8.GetBytes(entryStr);des.Key = _keyByte;using (MemoryStream ms = new MemoryStream()){using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write)){cs.Write(_valueByte, 0, _valueByte.Count());cs.FlushFinalBlock();}return System.Text.Encoding.Default.GetString(ms.ToArray()); }}}}

MD5加密code：

using System;using System.Collections.Generic;using System.Linq;using System.Security.Cryptography;using System.Text;using System.Threading.Tasks;namespace Encryption{interface IMD5Encryt{string GetMd5Str(string ConvertString);string UserMd5(string str);}class MD5Encryt : IMD5Encryt{/// <summary>/// MD5 16位加密/// </summary>/// <param name="ConvertString"></param>/// <returns></returns>public string GetMd5Str(string ConvertString){MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();string t2 = BitConverter.ToString(puteHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);t2 = t2.Replace("-", "");return t2;}/// <summary>/// MD532位加密/// </summary>/// <param name="str"></param>/// <returns></returns>public string UserMd5(string str){string cl = str;string pwd = "";MD5 md5 = MD5.Create();//实例化一个md5对像// 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择byte[] s = puteHash(Encoding.UTF8.GetBytes(cl));// 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得for (int i = 0; i < s.Length; i++){// 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符 pwd = pwd + s[i].ToString("X");}return pwd;}}}