ASP.NET MVC5+EF6+EasyUI 后台管理系统(62)-EF链接串加密
系列目录
前言:
这一节提供一个简单的功能,这个功能看似简单,找了一下没找到EF链接数据库串的加密帮助文档,只能自己写了,这样也更加符合自己的加密要求
- 有时候我们发布程序为了避免程序外的SQL链接串明文暴露,需要进行一些加密手段!
- 加密主要分几类:对称加密,非对称加密,散列算法(自己百度脑补,这里不再多说)
- 我这里选择AES 256位的加密,主要加密速度算法快,安全性高,资源消耗低。
- 公司一直在使用AES加密来加密一些小数据量的数据,比较方法和安全
这是我选择加密AES的理由,当然你可以选择其他有名的加密算法,比如MD5,SHA,3DES.(注:大公司应该都是禁止自行写算法的来加解密的)
知识点:
数据的使用跟我们登录流程基本都是一样的,获取加密链接串,然后解密使用
所以我们需要:
- 加密类
- 加密工具
- EF在何处使用链接字符串
1.加密类
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Security.Cryptography; using System.IO; namespace Apps.Common { public class AESEncryptHelper { /// <summary> /// 获取密钥 /// </summary> private static string Key { get { return @")O[NB]6,YF}+efcaj{+oESb9d8>Z'e9M"; } } /// <summary> /// 获取向量 /// </summary> private static string IV { get { return @"L+\~f4,Ir)b$=pkf"; } } #region 参数是byte[]类型 /// <summary> /// AES加密 /// </summary> /// <param name="Data">被加密的明文</param> /// <param name="Key">密钥</param> /// <param name="Vector">向量</param> /// <returns>密文</returns> public static Byte[] AESEncrypt(Byte[] Data, String Key, String Vector) { Byte[] bKey = new Byte[32]; Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length); Byte[] bVector = new Byte[16]; Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length); Byte[] Cryptograph = null; // 加密后的密文 Rijndael Aes = Rijndael.Create(); try { // 开辟一块内存流 using (MemoryStream Memory = new MemoryStream()) { // 把内存流对象包装成加密流对象 using (CryptoStream Encryptor = new CryptoStream(Memory, Aes.CreateEncryptor(bKey, bVector), CryptoStreamMode.Write)) { // 明文数据写入加密流 Encryptor.Write(Data, 0, Data.Length); Encryptor.FlushFinalBlock(); Cryptograph = Memory.ToArray(); } } } catch { Cryptograph = null; } return Cryptograph; } /// <summary> /// AES解密 /// </summary> /// <param name="Data">被解密的密文</param> /// <param name="Key">密钥</param> /// <param name="Vector">向量</param> /// <returns>明文</returns> public static Byte[] AESDecrypt(Byte[] Data, String Key, String Vector) { Byte[] bKey = new Byte[32]; Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length); Byte[] bVector = new Byte[16]; Array.Copy(Encoding.UTF8.GetBytes(Vector.PadRight(bVector.Length)), bVector, bVector.Length); Byte[] original = null; // 解密后的明文 Rijndael Aes = Rijndael.Create(); try { // 开辟一块内存流,存储密文 using (MemoryStream Memory = new MemoryStream(Data)) { // 把内存流对象包装成加密流对象 using (CryptoStream Decryptor = new CryptoStream(Memory, Aes.CreateDecryptor(bKey, bVector), CryptoStreamMode.Read)) { // 明文存储区 using (MemoryStream originalMemory = new MemoryStream()) { Byte[] Buffer = new Byte[1024]; Int32 readBytes = 0; while ((readBytes = Decryptor.Read(Buffer, 0, Buffer.Length)) > 0) { originalMemory.Write(Buffer, 0, readBytes); } original = originalMemory.ToArray(); } } } } catch { original = null; } return original; } #endregion #region 参数是string类型 /// <summary> /// AES加密 /// </summary> /// <param name="plainStr">明文字符串</param> /// <returns>密文</returns> public static string AESEncrypt(string plainStr) { byte[] bKey = Encoding.UTF8.GetBytes(Key); byte[] bIV = Encoding.UTF8.GetBytes(IV); byte[] byteArray = Encoding.UTF8.GetBytes(plainStr); string encrypt = null; Rijndael aes = Rijndael.Create(); using (MemoryStream mStream = new MemoryStream()) { using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bIV), CryptoStreamMode.Write)) { cStream.Write(byteArray, 0, byteArray.Length); cStream.FlushFinalBlock(); encrypt = Convert.ToBase64String(mStream.ToArray()); } } aes.Clear(); return encrypt; } /// <summary> /// AES加密 /// </summary> /// <param name="plainStr">明文字符串</param> /// <param name="returnNull">加密失败时是否返回 null,false 返回 String.Empty</param> /// <returns>密文</returns> public static string AESEncrypt(string plainStr, bool returnNull) { string encrypt = AESEncrypt(plainStr); return returnNull ? encrypt : (encrypt == null ? String.Empty : encrypt); } /// <summary> /// AES解密 /// </summary> /// <param name="encryptStr">密文字符串</param> /// <returns>明文</returns> public static string AESDecrypt(string encryptStr) { byte[] bKey = Encoding.UTF8.GetBytes(Key); byte[] bIV = Encoding.UTF8.GetBytes(IV); byte[] byteArray = Convert.FromBase64String(encryptStr); string decrypt = null; Rijndael aes = Rijndael.Create(); using (MemoryStream mStream = new MemoryStream()) { using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write)) { cStream.Write(byteArray, 0, byteArray.Length); cStream.FlushFinalBlock(); decrypt = Encoding.UTF8.GetString(mStream.ToArray()); } } aes.Clear(); return decrypt; } /// <summary> /// AES解密 /// </summary> /// <param name="encryptStr">密文字符串</param> /// <param name="returnNull">解密失败时是否返回 null,false 返回 String.Empty</param> /// <returns>明文</returns> public static string AESDecrypt(string encryptStr, bool returnNull) { string decrypt = AESDecrypt(encryptStr); return returnNull ? decrypt : (decrypt == null ? String.Empty : decrypt); } #endregion #region 256位AES加密算法 /// <summary> /// 256位AES加密 /// </summary> /// <param name="toEncrypt"></param> /// <returns></returns> public static string Encrypt(string toEncrypt) { // 256-AES key byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key); byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt); RijndaelManaged rDel = new RijndaelManaged(); rDel.Key = keyArray; rDel.Mode = CipherMode.ECB; rDel.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = rDel.CreateEncryptor(); byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length); } /// <summary> /// 256位AES解密 /// </summary> /// <param name="toDecrypt"></param> /// <returns></returns> public static string Decrypt(string toDecrypt) { // 256-AES key byte[] keyArray = UTF8Encoding.UTF8.GetBytes(Key); 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 } }
网上一抓一大把,自己搜索想要的加密类啦!
2.加密工具
加密工具这个网上抓不到,需要自己结合加密类来开发,这个不用我带领大伙来开发吧,好吧
新建一个WinFrom程序,命名Apps.EncryptHelper,引用你加密类的所在的类库,或者直接放到Apps.EncryptHelper下就可以
从工具栏拉取2个TextBox和2个Button排版好,基本页面就做完了,最后分别双击两个按钮进入事件实现代码
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using Apps.Common; namespace Apps.EncryptHelper { public partial class Encrypt : Form { public Encrypt() { InitializeComponent(); } //加密 private void btnEncrypt_Click(object sender, EventArgs e) { if (string.IsNullOrEmpty(txtSourceText.Text)) { MessageBox.Show("没数据加毛密-_-!"); return; } else { txtResultText.Text = AESEncryptHelper.Encrypt(txtSourceText.Text); } } //解密 private void btnDecrypt_Click(object sender, EventArgs e) { if (string.IsNullOrEmpty(txtSourceText.Text)) { MessageBox.Show("没数据解毛密-_-!"); return; } else if (!IsBase64Formatted(txtSourceText.Text)) { MessageBox.Show("别逗了,我只认识被我加过密的?"); return; } else { txtResultText.Text = AESEncryptHelper.Decrypt(txtSourceText.Text); } } public static bool IsBase64Formatted(string input) { try { Convert.FromBase64String(input); return true; } catch { return false; } } } }
几十行代码,解决车房老婆问题!运行....
.
3.结合进EF
这块还是比较容易搞定的
第一:找到web.config的connectionStrings的EF链接串
第二:把修改对应Key串的Value
<connectionStrings> <add name="DBContainer" connectionString="ka7ocMA8nEYPjbQYUlVwbsmTeIdxKGE+ZfXAu3/0eMhVRP+iN+9ECpY/lItoY9vfZVDA9EVgmMzH/8Z0rxRIhGPRhVMFWliBuJ9RDGtHbqRY02voyLbrZ7IiXRnXyhlLFsvgj23KXnHl8J6jxB1QNsmuUxPlqnD6HP9y5RQq2EJ//OT+uKqhVC1qUqVzdY+XR6HX/O5jGk6kJGk3Nk83qo09eBOundO7OdxQG9SXPUYNyZjhyx9YV2/1UbghuxHrxHrAuxiE4mJLqH/rusjAy8d3LS/ROiiBszSY+I400Ce4NigDwZaG679yvBKBQ5pg" providerName="System.Data.EntityClient" /> </connectionStrings>
第三:找到EF读取串的地方
这里必须读取解密后发的字符串,所以我们再写一个方法来获取解密后的字符串ConfigPara
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Apps.Common { public class ConfigPara { public static string EFDBConnection { get { string connection = System.Configuration.ConfigurationManager.ConnectionStrings["DBContainer"].ConnectionString; return AESEncryptHelper.Decrypt(connection); } } } }
注意修改后也是没有用的,会回档,因为这个类是根据T4生成的,所以我们必须修改T4
修改对应红框的位置!
搞破坏的,难道你现在还能看懂我的连接串?:-)
ok。实现加密,运行正常
大家赶快把他继承到系统里面!
谢谢大家!
作者:YmNets
出处:http://ymnets.cnblogs.com/
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。
出处:http://ymnets.cnblogs.com/
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。