asp.net-web-api – 自定义身份验证asp.net核心web api

public static class Authentication
{
    public const string Scheme = "Custom";
}

然后,您必须继承AuthenticationHandler< TOptions>.以下是验证标头值的逻辑：

public class MyAuthenticationHandler : AuthenticationHandler<MyOptions>
{
    protected override Task<AuthenticateResult> HandleAuthenticateAsync()
    {
        var authorizationHeader = Context.Request.Headers["Authorization"];
        if (!authorizationHeader.Any())
            return Task.FromResult(AuthenticateResult.Skip());

        var value = authorizationHeader.ToString();
        if (string.IsNullOrWhiteSpace(value))
            return Task.FromResult(AuthenticateResult.Skip());

        // place logic here to validate the header value (decrypt,call db etc)

        var claims = new[]
        {
            new Claim(System.Security.Claims.ClaimTypes.Name,"Bob")
        };

        // create a new claims identity and return an AuthenticationTicket 
        // with the correct scheme
        var claimsIdentity = new ClaimsIdentity(claims,Authentication.Scheme);

        var ticket = new AuthenticationTicket(new ClaimsPrincipal(claimsIdentity),new AuthenticationProperties(),Authentication.Scheme);

        return Task.FromResult(AuthenticateResult.Success(ticket));
    }
}

为了继承AuthenticationHandler,您必须创建一个选项类,在其中将AuthenticationScheme属性设置为您正在使用的方案：

public class MyOptions : AuthenticationOptions
{
    AuthenticationScheme = Authentication.Scheme;
}

在此之后,您必须继承AuthenticationMiddleware< TOptions>.这将创建您在上一步中实现的处理程序：

public class MyAuthenticationMiddleware : AuthenticationMiddleware<MyOptions>
{
    public MyAuthenticationMiddleware(RequestDelegate next,IOptions<MyOptions> options,ILoggerFactory loggerFactory,UrlEncoder encoder) : base(next,options,loggerFactory,encoder)
    {
    }

    protected override AuthenticationHandler<MyOptions> CreateHandler()
    {
        return new MyAuthenticationHandler();
    }
}

为了轻松插入中间件,您可以定义以下扩展方法：

public static IApplicationBuilder UseMyAuthentication(this IApplicationBuilder app,IConfigurationSection config)
{
    return app.UseMyAuthentication(options => {});
}

private static IApplicationBuilder UseMyAuthentication(this IApplicationBuilder app,Action<MyOptions> configure)
{
    var options = new MyOptions();
    configure?.Invoke(options);

    return app.UseMiddleware<MyAuthenticationMiddleware>(new OptionsWrapper<MyOptions>(options));
}

然后在您的Startup类中,您最终可以添加您的中间件：

public void Configure(IApplicationBuilder app,IHostingEnvironment env)
{
    app.UseMyAuthentication(Configuration.GetSection("MyAuthenticationOptions"));

    // other stuff

    app.UseMvc();
}

然后在指定刚刚创建的方案的操作上添加AuthorizeAttribute：

[Authorize(ActiveAuthenticationSchemes = Authentication.Scheme)]
public IActionResult Get()
{
    // stuff ...
}

有很多步骤,但希望这会让你前进！