A call to SSPI failed SSL routines:OPENSSL s with Android 5.0 and lower versions

Question

_{Friday, May 3, 2019 8:31 AM}

I get this error in versions with Android 5.0 and lower versions

Error : System.Net.WebException: Error: TrustFailure (A call to SSPI failed, see inner exception.) > System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. > Mono.Btls.MonoBtlsException: Ssl error:1000007d:SSL routines:OPENSSLinternal:CERTIFICATEVERIFYFAILED\n at /Users/builder/jenkins/workspace/xamarin-android-d15-9/xamarin-android/external/mono/external/boringssl/ssl/handshakeclient.c:1132\n at Mono.Btls.MonoBtlsContext.ProcessHandshake () [0x00038] in :0 \n at Mono.Net.Security.MobileAuthenticatedStream.ProcessHandshake (Mono.Net.Security.AsyncOperationStatus status) [0x0003e]

My Code: `string result = ""; try { HttpClient client = await GetClient(); var MyUrl = Url + "api/Univesitemain/Yemeklistesi";

            result = await client.GetStringAsync(MyUrl);

        }
        catch (Exception ex)
        {
            var error = ex.ToString();
        }
        return JsonConvert.DeserializeObject<IEnumerable<YemekListesi>>(result);`

All replies (8)

_{Sunday, May 12, 2019 12:50 PM ✅Answered}

My App it Worked after add this code To android MainActivity inside OnCreate() ServicePointManager.ServerCertificateValidationCallback += (o, cert, chain, errors) => true;

_{Monday, May 13, 2019 3:19 PM ✅Answered}

Or add it like this

public async Task GetClient() { HttpClientHandler handler = new HttpClientHandler(); handler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true; HttpClient client = new HttpClient(handler);
client.DefaultRequestHeaders.Add("Accept", "application/json"); return client; }

_{Friday, October 11, 2019 5:10 AM}

hello @abdalrhman ,

which one is best and where should I assign client for the second solution you did return client.

_{Friday, October 11, 2019 7:04 AM}

@vinothswami said: hello @abdalrhman ,

which one is best and where should I assign client for the second solution you did return client.

i am add thre second solution in my WebService class

_{Tuesday, October 15, 2019 3:19 PM}

Thank you @abdalrhman, I did the first solution in Android main activity.

_{Friday, January 17, 2020 7:16 AM}

@abdalrhman said: Or add it like this

public async Task GetClient() { HttpClientHandler handler = new HttpClientHandler(); handler.ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true; HttpClient client = new HttpClient(handler);
client.DefaultRequestHeaders.Add("Accept", "application/json"); return client; }

I wish I was rich man, was gonna pay you for this, I almost abandoned one of my awesome projects and Xamarin completely because of this error. Thank you a million times. ???

_{Sunday, January 26, 2020 9:16 PM}

@abdalrhman said: My App it Worked after add this code To android MainActivity inside OnCreate() ServicePointManager.ServerCertificateValidationCallback += (o, cert, chain, errors) => true;

It didn´t work for me :'(

_{Friday, September 4, 2020 8:36 AM}

Hmm. The accepted answer appears to be 'ignore any certificate errors'. Doesn't sound like a good solution to me.