WebDAV with untrusted SSL cert from .NET

WinSCP version: 5.7 (https://winscp.net/download/winscp570automation.zip)

I am trying to connect to a WebDAV server with a self-signed certificate using the .NET assembly. I can connect to the same server with the WebDAV protocol on a different port (and with the WinSCP GUI) without SSL but I can't figure out the correct options to set to get SSL working.

If I don't supply the server's host certificate fingerprint, I get the error (as expected):

WinSCP.SessionRemoteException: Server certificate verification failed: certificate issued for a different hostname, issuer is not trusted ---> WinSCP.SessionRemoteException: Connection failed.

If I supply the certificate fingerprint with SessionOptions.TlsHostCertificateFingerprint, I get the error:

System.ArgumentException: SessionOptions.TlsHostCertificateFingerprint or SessionOptions.GiveUpSecurityAndAcceptAnyTlsHostCertificate is set, but SessionOptions.FtpSecure is FtpSecure.None.

So then if I set SessionOptions.FtpSecure to FtpSecure.Implicit, I get the error:

System.ArgumentException: SessionOptions.FtpSecure is not FtpSecure.None, but SessionOptions.Protocol is not Protocol.Ftp.

Is there anything else I can try?

Thanks for your report.

That's a bug, will fix it.

Meanwhile, you can download source code of WinSCP and modify the check in Session.SessionOptionsToOpenSwitches.

Instead of
use

This bug has been added to the tracker:
Bug 1284 – It is not possible to configure certificate accepting with WebDAV protocol in .NET assembly

I'm sending you an email with a development version of WinSCP to address you have used to register on this forum.

Dev version works great! Thanks!

Hello,

I'm having the same issue with SSL WebDAV.

Can I also give this dev version a try?

Thanks!
Frederik

@fvboegeld: Sent.

Thanks

Its working perfect now!

Frederik

Hi, can I have this version please.

@kyle: Just download the latest version, this has been fixed while ago:
Bug 1284 – It is not possible to configure certificate accepting with WebDAV protocol in .NET assembly

I can't find the latest version to download. I went to download link (https://winscp.net/eng/download.php), but that is the version modified on 6/3/2016, which is before the fixed one.
Please help.

@Peterpan: No idea what you mean. The bug was fixed in 5.7.1, which was released on 2015-03-25 (over a year ago). The current stable version is 5.7.7, released on 2016-03-06.