c# - example - Uso de certificados de cliente SSL personalizados System.Net.HttpClient en Mono



httpclient xamarin (1)

Estoy usando las bibliotecas de clientes HTTP de Microsoft de NuGet y básicamente estoy tratando de permitir la autenticación TLS en HttpClient utilizando certificados X509Certificate2.

He intentado crear el cliente así:

WebRequestHandler certHandler = new WebRequestHandler () {
    ClientCertificateOptions = ClientCertificateOption.Manual,
    UseDefaultCredentials = false
};
certHandler.ClientCertificates.Add (this.ClientCertificate);
HttpClient client = new HttpClient (certHandler);

Sin embargo, certHandler.ClientCertificates está fallando porque este getter no está implementado en Mono , así que obtengo una NotImplementedException de eso. (No estoy seguro de por qué eso todavía es TODO)

Hasta ahora estoy fuera de suerte. ¿Alguna idea de cómo puedo simplemente configurar un certificado de cliente en HttpClient en el entorno Mono?


Parece que solo se trata de poder pasar la recopilación de certificados del cliente a HttpWebRequest en CreateWebRequest, por lo que, dado que la herencia no funcionará, simplemente copio / pegué la clase de mono y agregué la implementación.

// Copyright (c) 2013 Xamarin Inc. (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Net.Cache;
using System.Net.Security;
using System.Security.Principal;
using System.Security.Cryptography.X509Certificates;

namespace System.Net.Http
{
    public class WebRequestHandlerWithClientcertificates : HttpClientHandler
    {
        bool allowPipelining;
        RequestCachePolicy cachePolicy;
        AuthenticationLevel authenticationLevel;
        TimeSpan continueTimeout;
        TokenImpersonationLevel impersonationLevel;
        int maxResponseHeadersLength;
        int readWriteTimeout;
        RemoteCertificateValidationCallback serverCertificateValidationCallback;
        bool unsafeAuthenticatedConnectionSharing;
        private X509CertificateCollection clientCertificates;

        public WebRequestHandler ()
        {
            allowPipelining = true;
            authenticationLevel = AuthenticationLevel.MutualAuthRequested;
            cachePolicy = System.Net.WebRequest.DefaultCachePolicy;
            continueTimeout = TimeSpan.FromMilliseconds (350);
            impersonationLevel = TokenImpersonationLevel.Delegation;
            maxResponseHeadersLength = HttpWebRequest.DefaultMaximumResponseHeadersLength;
            readWriteTimeout = 300000;
            serverCertificateValidationCallback = null;
            unsafeAuthenticatedConnectionSharing = false;
        }

        public bool AllowPipelining {
            get { return allowPipelining; }
            set {
                EnsureModifiability ();
                allowPipelining = value;
            }
        }

        public RequestCachePolicy CachePolicy {
            get { return cachePolicy; }
            set {
                EnsureModifiability ();
                cachePolicy = value;
            }
        }

        public AuthenticationLevel AuthenticationLevel {
            get { return authenticationLevel; }
            set {
                EnsureModifiability ();
                authenticationLevel = value;
            }
        }

        public X509CertificateCollection ClientCertificates {
            get {
                if (clientCertificates==null) {
                    clientCertificates = new X509CertificateCollection();
                }
                return clientCertificates;
            }
            set {
                if (value==null) {
                    throw new ArgumentNullException("value");
                }
                EnsureModifiability ();
                clientCertificates = value;
            }
        }

        [MonoTODO]
        public TimeSpan ContinueTimeout {
            get { return continueTimeout; }
            set {
                EnsureModifiability ();
                continueTimeout = value;
            }
        }

        public TokenImpersonationLevel ImpersonationLevel {
            get { return impersonationLevel; }
            set {
                EnsureModifiability ();
                impersonationLevel = value;
            }
        }

        public int MaxResponseHeadersLength {
            get { return maxResponseHeadersLength; }
            set {
                EnsureModifiability ();
                maxResponseHeadersLength = value;
            }
        }

        public int ReadWriteTimeout {
            get { return readWriteTimeout; }
            set {
                EnsureModifiability ();
                readWriteTimeout = value;
            }
        }

        [MonoTODO]
        public RemoteCertificateValidationCallback ServerCertificateValidationCallback {
            get { return serverCertificateValidationCallback; }
            set {
                EnsureModifiability ();
                serverCertificateValidationCallback = value;
            }
        }

        public bool UnsafeAuthenticatedConnectionSharing {
            get { return unsafeAuthenticatedConnectionSharing; }
            set {
                EnsureModifiability ();
                unsafeAuthenticatedConnectionSharing = value;
            }
        }

        internal override HttpWebRequest CreateWebRequest (HttpRequestMessage request)
        {
            HttpWebRequest wr = base.CreateWebRequest (request);

            wr.Pipelined = allowPipelining;
            wr.AuthenticationLevel = authenticationLevel;
            wr.CachePolicy = cachePolicy;
            wr.ImpersonationLevel = impersonationLevel;
            wr.MaximumResponseHeadersLength = maxResponseHeadersLength;
            wr.ReadWriteTimeout = readWriteTimeout;
            wr.UnsafeAuthenticatedConnectionSharing = unsafeAuthenticatedConnectionSharing;
            // here : maybe wr.ClientCertificates = ClientCertificates if the line below throws an error in your tests
            wr.ClientCertificates.Add(ClientCertificates);

            return wr;
        }
    }
}

ahora en su código use un WebRequestHandlerWithClientCertificates en lugar de un WebRequestHandler





dotnet-httpclient