SSL/TLS System.NotSupportedException

[Simon]

Hey gang.

We have an application which has been released for several years and is
running on a large array of devices however we now have an issue on a WM5
Symbol device.

Our app runs on several other WM5/6 devices fine.

WebRequest/HttpWebRequest are failing on a SSL request with the following
exception stack trace:

System.Net.WebException: Could not establish secure channel for SSL/TLS --->
System.NotSupportedException: The requested security package is not supported.
at System.Net.SslConnectionState..ctor()
at System.Net.SslConnectionState..ctor()
at System.Net.Connection.connect()
at WorkItem.doWork()
at System.Threading.Timer.ring()

at System.Net.HttpWebRequest.finishGetResponse()
at System.Net.HttpWebRequest.GetResponse()

We have ensured it is running under the NETCF 2 sp2 that we support on all
other devices. We also tested running on NETCF 3.5 and still the same error.

Is there a registry setting or something that the device manufacturer has
set to cause this to error?

SSL is working fine on all other devices thus far. We have the
ServicePointManager.CertificatePolicy implemented etc which is working fine
up until this device.

That exception occurs on the request.GetResponse() method call.

Any help would be greatly appreciated!

 

[Paul G. Tobey [eMVP]]

I would guess (and I really mean that), that the Symbol device that fails
does not include SSL/TLS in its operating system. I'd consult with them, in
parallel at least with the thread here.

Paul T.