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HomeBackend DevelopmentC#.Net TutorialASP.NET Core data protection generates verification token

ASP.NET Core Data Protection not only provides asymmetric encryption capabilities, but also provides flexible key storage methods and consistent encryption and decryption interfaces (Protect and Unprotect). It is used in Session, Cookie verification, and OpenIdConnect. . . Of course, you can also use it in application development. For example, in this blog post, it is used to generate a verification token for activating an account.

First register the DataProtection service in Startup.ConfigureServices() (inject the implementation of the IDataProtectionProvider interface):

public void ConfigureServices(IServiceCollection services)
{
  services.AddDataProtection();
}

Then use Add the IDataProtectionProvider interface to the constructor of the DataProtection class, and use this interface to create a DataProtector, and then use it to create a SecureDataFormat. Finally, use the SecureDataFormat.Protect() method to generate a token to activate the account, and use SecureDataFormat.Uprotect() to decrypt the token. Complete sample code As follows:

public class HomeController : Controller
{
  private readonly ISecureDataFormat<string> _dataFormat;

  public HomeController(IDataProtectionProvider _dataProtectionProvider)
  {
    var dataProtector = _dataProtectionProvider.CreateProtector(typeof(HomeController).FullName);
    _dataFormat = new SecureDataFormat<string>(new StringSerializer(), dataProtector);
  }

  public string GenerateToken()
  {
    return _dataFormat.Protect(Guid.NewGuid().ToString() + ";" + DateTime.Now.AddHours(10));
  }

  public string DecryptToken(string token)
  {
    return _dataFormat.Unprotect(token);
  }

  private class StringSerializer : IDataSerializer<string>
  {
    public string Deserialize(byte[] data)
    {
      return Encoding.UTF8.GetString(data);
    }

    public byte[] Serialize(string model)
    {
      return Encoding.UTF8.GetBytes(model);
    }
  }
}

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