我想实现我的xamarin应用程序客户端证书身份验证。最重要的是我使用的是自定义的证书颁发机构(CA)以及TLS 1.2。
直到现在我设法得到它运行采用了android,UWP和WPF。唯一缺少的平台是IOS。
这里是我的NSUrlSessionDelegate:
public class SSLSessionDelegate : NSUrlSessionDelegate, INSUrlSessionDelegate
{
private NSUrlCredential Credential { get; set; }
private SecIdentity identity = null;
private X509Certificate2 ClientCertificate = null;
private readonly SecCertificate CACertificate = null;
public SSLSessionDelegate(byte[] caCert) : base()
{
if (caCert != null)
{
CACertificate = new SecCertificate(new X509Certificate2(caCert));
}
}
public void SetClientCertificate(byte[] pkcs12, char[] password)
{
if (pkcs12 != null)
{
ClientCertificate = new X509Certificate2(pkcs12, new string(password));
identity = SecIdentity.Import(ClientCertificate);
SecCertificate certificate = new SecCertificate(ClientCertificate);
SecCertificate[] certificates = { certificate };
Credential = NSUrlCredential.FromIdentityCertificatesPersistance(identity, certificates, NSUrlCredentialPersistence.ForSession);
}
else
{
ClientCertificate = null;
identity = null;
Credential = null;
}
}
public override void DidReceiveChallenge(NSUrlSession session, NSUrlAuthenticationChallenge challenge, Action<NSUrlSessionAuthChallengeDisposition, NSUrlCredential> completionHandler)
{
if (challenge.ProtectionSpace.AuthenticationMethod == NSUrlProtectionSpace.AuthenticationMethodClientCertificate)
{
NSUrlCredential c = Credential;
if (c != null)
{
completionHandler.Invoke(NSUrlSessionAuthChallengeDisposition.UseCredential, c);
return;
}
}
if (challenge.ProtectionSpace.AuthenticationMethod == NSUrlProtectionSpace.AuthenticationMethodServerTrust)
{
SecTrust secTrust = challenge.ProtectionSpace.ServerSecTrust;
secTrust.SetAnchorCertificates(new SecCertificate[] {
CACertificate
});
secTrust.SetAnchorCertificatesOnly(true);
}
completionHandler.Invoke(NSUrlSessionAuthChallengeDisposition.PerformDefaultHandling, null);
}
}
如果没有客户端证书配置DidReceiveChallenge
与AuthenticationMethodServerTrust
调用一次,自定义CA接受这工作。
但是,一旦一个客户端证书配置DidReceiveChallenge
被调用4次(两次,每次AuthenticationMethod
)和我正在NSURLErrorDomain (-1200)
错误。
任何人任何想法,我做错了什么?
该SSLSessionDelegate
这样使用:
public class HttpsServer : AbstractRemoteServer, IRemoteServer
{
private static readonly Logger LOG = LogManager.GetLogger();
private SSLSessionDelegate sSLSessionDelegate;
private NSUrlSession session;
private NSUrl baseAddress;
public HttpsServer()
{
sSLSessionDelegate = new SSLSessionDelegate(SSLSupport.GetTruststoreRaw());
NSUrlSessionConfiguration configuration = NSUrlSessionConfiguration.DefaultSessionConfiguration;
configuration.HttpShouldSetCookies = true;
configuration.TimeoutIntervalForRequest = 30;
configuration.TLSMinimumSupportedProtocol = SslProtocol.Tls_1_2;
configuration.TimeoutIntervalForResource = 30;
NSMutableDictionary requestHeaders;
if (configuration.HttpAdditionalHeaders != null)
{
requestHeaders = (NSMutableDictionary)configuration.HttpAdditionalHeaders.MutableCopy();
}
else
{
requestHeaders = new NSMutableDictionary();
}
AppendHeaders(requestHeaders, SSLSupport.GetDefaultHeaders());
configuration.HttpAdditionalHeaders = requestHeaders;
session = NSUrlSession.FromConfiguration(configuration, (INSUrlSessionDelegate)sSLSessionDelegate, NSOperationQueue.MainQueue);
baseAddress = NSUrl.FromString(SSLSupport.GetBaseAddress());
}
public void SetClientCertificate(byte[] pkcs12, char[] password)
{
sSLSessionDelegate.SetClientCertificate(pkcs12, password);
}
public override async Task<string> GetString(string url, Dictionary<string, string> headers, CancellationToken cancellationToken)
{
NSData responseContent = await GetRaw(url, headers, cancellationToken);
return NSString.FromData(responseContent, NSStringEncoding.UTF8).ToString();
}
private async Task<NSData> GetRaw(string url, Dictionary<string, string> headers, CancellationToken cancellationToken)
{
NSMutableUrlRequest request = GetRequest(url);
request.HttpMethod = "GET";
request.Headers = AppendHeaders(request.Headers, headers);
Task<NSUrlSessionDataTaskRequest> taskRequest = session.CreateDataTaskAsync(request, out NSUrlSessionDataTask task);
cancellationToken.Register(() =>
{
if (task != null)
{
task.Cancel();
}
});
try
{
task.Resume();
NSUrlSessionDataTaskRequest taskResponse = await taskRequest;
if (taskResponse == null || taskResponse.Response == null)
{
throw new Exception(task.Error.Description);
}
else
{
NSHttpUrlResponse httpResponse = (NSHttpUrlResponse)taskResponse.Response;
if (httpResponse.StatusCode == 303)
{
if (!httpResponse.AllHeaderFields.TryGetValue(new NSString("Location"), out NSObject locationValue))
{
throw new Exception("redirect received without Location-header!");
}
return await GetRaw(locationValue.ToString(), headers, cancellationToken);
}
if (httpResponse.StatusCode != 200)
{
throw new Exception("unsupported statuscode: " + httpResponse.Description);
}
return taskResponse.Data;
}
}
catch (Exception ex)
{
throw new Exception("communication exception: " + ex.Message);
}
}
}
在这里我Info.plist
<key>NSAppTransportSecurity</key>
<dict>
<key>NSExceptionDomains</key>
<dict>
<key>XXXXXXXXXX</key>
<dict>
<key>NSExceptionAllowsInsecureHTTPLoads</key>
<true/>
<key>NSIncludesSubdomains</key>
<true/>
</dict>
</dict>
</dict>
无论是我找到了解决办法,也没有任何人都可以给我一个提示,所以最后删除的客户端 - 证书了。我切换到OAuth2授权和使用自己的证书颁发机构(没有自签名证书),用于服务器-authentication效果很好。
不过还是我对这个问题感兴趣,并很高兴在如何使其工作每一个想法。
我建议使用ModernHttpClient。它支持Android和iOS ClientCertificates。它是开源的,所以你总是可以检查他们的参考github上,如果你想完成自己的实现。