[英]How to use authentication with self hosted WCF OData service
我有一个WCF DataService,它与DataServiceHost
一起在控制台应用程序中运行
我可以成功启动主机,并使用以下代码查询WCF DataService
public void Start()
{
var uri = new Uri("http://localhost:12345/Products");
var host = new DataServideHost(typeof(ProductsDataService), uri);
if (host.Description.Behaviors.Find<ServiceMetadataBehavior>() == null)
host.Description.Behaviors.Add(new ServiceMetadataBehavior());
if (host.Description.Behaviors.Find<ServiceDebugBehavior>() == null)
host.Description.Behaviors.Add(new ServiceDebugBehavior());
host.Description.Behaviors.Find<ServiceMetadataBehavior()
.HttpGetEnabled = true;
host.Description.Behaviors.Find<ServiceDebugBehavior>()
.IncludeExceptionDetailInFaults = true;
host.AddServiceEndpoint(
new ServiceEndpoint(ContractDescription.GetContract(serviceType))
{
Name = "default",
Address = new EndpointAddress(baseAddress),
Contract = ContractDescription.GetContract(
typeof(IRequestHandler)),
Binding = new WebHttpBinding(),
});
host.Open();
}
我如何通过基本身份验证或其他方式保护此服务的安全(请注意,我的服务将通过https保护)
我找到了很多有关如何使用IHttpModule
使用IIS保护DataService的示例,但是我还发现有帖子说我不能在我的DataServiceHost中使用HttpModules。
有人可以给我提示如何实现身份验证吗?
基于博客文章OData和Authentication –第4部分–服务器端挂钩,我创建了一种用于DataServices的扩展方法。 请记住,您仅通过HTTPS使用基本身份验证,否则您的密码将对其他用户可见,因为用户名/密码只是对base64进行解码的。 为了进行测试,您可以删除此检查, if (!context.Request.IsSecureConnection) return false;
用法:
public ProductsDataService : EntityFrameworkDataService<ProductsContext>
{
private static validator = new UserValidator();
public ProductsDataService()
{
this.UseBasicAuthentification("My Realm", validator);
}
private class UserValidator : IUserValidator
{
public IPrincipal Validate(string username, string password)
{
// just an example implementation
if (!"1234".Equals(password)) retur null;
return new GenericPrincipal(
new GenericIdentity(username), "Admin", "User");
}
}
}
这是实现。 您只需要创建一个满足您需要的IUserValidator实现即可。
public static class DataServiceExtensions
{
public static void UseBasicAuthentification<T>(
this DataService<T> service, string realm, IUserValidator validator)
{
service.ProcessingPipeline.ProcessingRequest += (_sender, _e) =>
{
if (!Authenticate(_e.OperationContext, validator))
{
_e.OperationContext.ResponseHeaders.Add(
"WWW-Authenticate", "Basic realm=" +
Convert.ToBase64String(
Encoding.UTF8.GetBytes(GlobalConfiguration.Realm)));
throw new DataServiceException(401, "401 Unauthorized");
}
};
}
static bool Authenticate(DataServiceOperationContext context,
IUserValidator validator)
{
if (!context.RequestHeaders.AllKeys.Contains("Authorization"))
return false;
// Remember claims based security should be only be
// used over HTTPS
if (!context.Request.IsSecureConnection)
return false;
string authHeader = context.RequestHeaders["Authorization"];
IPrincipal principal = null;
if (TryGetPrincipal(authHeader, validator, out principal))
{
//context.User = principal;
return true;
}
return false;
}
private static bool TryGetPrincipal(string authHeader,
IUserValidator validator, out IPrincipal principal)
{
var protocolParts = authHeader.Split(' ');
if (protocolParts.Length != 2)
{
principal = null;
return false;
}
else if (protocolParts[0] == "Basic")
{
var parameter = Encoding.UTF8.GetString(
Convert.FromBase64String(protocolParts[1]));
var parts = parameter.Split(':');
if (parts.Length != 2)
{
principal = null;
return false;
}
var username = parts[0];
var password = parts[1];
principal = validator.Validate(username, password);
return principal != null;
}
else
{
principal = null;
return false;
}
}
}
public interface IUserValidator
{
IPrincipal Validate(string username, string password);
}
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