Custom CRM integration: OpenSSL Error only on Debian 12 hosted systems with v20

[joevoo]

Hello!

I use my own CRM integration on various 3CX instances, which works without problems on v18 and v20 Windows systems. With 3CX instances under Debian, however, I always get an error from the SSL component when testing under "Integrations" --> "CRM" --> "Test". The API I use at team.greyhound-software.com has a valid SSL certificate.

Started scenario with empty id
Request text: https://team.greyhound-software.com
System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception.
---> Interop+OpenSsl+SslException: SSL Handshake failed with OpenSSL error - SSL_ERROR_SSL.
---> Interop+Crypto+OpenSslCryptographicException: error:0A000410:SSL routines::sslv3 alert handshake failure
--- End of inner exception stack trace ---
at Interop.OpenSsl.DoSslHandshake(SafeSslHandle context, ReadOnlySpan`1 input, Byte[]& sendBuf, Int32& sendCount)
at System.Net.Security.SslStreamPal.HandshakeInternal(SafeDeleteSslContext& context, ReadOnlySpan`1 inputBuffer, Byte[]& outputBuffer, SslAuthenticationOptions sslAuthenticationOptions)
--- End of inner exception stack trace ---
at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)
at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(QueueItem queueItem)
at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.DecompressionHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at Microsoft.Extensions.Http.Logging.HttpClientLoggerHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at Microsoft.Extensions.Http.Logging.HttpClientLoggerHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
at Integration.Crm.Engine.ScenarioProcessorBase.ProcessRequest(Boolean authScenario, ScenarioRequest request, IValueManager customManager, HttpClient client, CancellationToken token)
at Integration.Crm.Engine.ScenarioProcessorBase.ProcessScenario(ProtocolScenario scenario, IValueManager customManager, SqlQueryParameter[] sqlQueryParameter, CancellationToken token)
at Integration.Crm.Engine.ScenarioProcessorBase.Execute(ProtocolScenario scenario, SqlQueryParameter[] sqlQueryParameter, CancellationToken token)
at Integration.Crm.Engine.CrmProcessor.GetContactInfoFromCrm(List`1 result, IEnumerable`1 scenariosToProcess, IValueManager customManager, SqlQueryParameter[] sqlQueryParameters, Func`2 filterResultsFunctor, Boolean exactMatch, CancellationToken token)
at Integration.Crm.Engine.CrmProcessor.GetContactInfo(String contactNumber, InteractionTypes interactionType, CancellationToken token)

As written: If I test this against a v20 3CX running on Windows, it works without any problems.

Maybe someone has an idea and can help me, thank you very much!

 

[edossantos_sipcaller]

Maybe this helps:
https://stackoverflow.com/questions...ographicexception-error0a000410ssl-routinesss

 

[joevoo]

Thanks for your feedback, how can I customise the openssl.cnf in a 3CX hosted debian environment?

 

[edossantos_sipcaller]

Thanks for your feedback, how can I customise the openssl.cnf in a 3CX hosted debian environment?

You can't do that in a hosted by 3CX instance, as you're not managing it. But maybe you can start by checking it in an instance you manage, just to understand what's going on. Then maybe there is something you can change on the CRM side to make it work with hosted by 3CX instances.