SLL decrypt dont work on linux?

[v405827]

Hello. I really like to use fiddler on windows, but on linux (xubuntu 18.04) I encountered the following problem.

I need to CAPTURE and DECRYPT HTTPS traffic. However, fiddler does not do this.

The traffic is captured ✅, but NOT decrypt ❌, in the inspector I get the following message: "This is a CONNECT tunnel, through which encrypted HTTPS traffic flows. This is not a decrypted HTTPS decryption option. Settings can be found inside Tools> Options> HTTPS".

As I understand it, the problem is NOT that I incorrectly imported certificates into the system and the browser, since I do NOT receive error messages in firefox.

Studying fiddler logs, I noticed the following information:

1.07: 58: 08: 4767 Fiddler.BCCertMaker> Failed to create certificate for www.linux.org.ru: Operation is not supported on this platform.
2.  at System.Security.Cryptography.X509Certificates.X509Certificate2.set_PrivateKey (System.Security.Cryptography.AsymmetricAlgorithm value) [0x00000] in <e8eb3d7a311640f484845e45cbec8973>: 0
3.  at BCCertMaker.BCCertMaker.CreateCertificateFromCA (System.String sCN, Org. Bouncy6Castle.X509.X509Certificate caCert, Org.BrcyCastle.Crypto.AsymmetricKeyParameter caKey) [0x00377] in <186d36066206 6 5 6 3 3 3 3 3 6 6 6 6 6 6 6 6 6 6 6 6 6 3 3 3 3 3 3 3 3 5 3 3 5 3 3 5 3 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 3 3 3
4.  at BCCertMaker.BCCertMaker.MakeNewCert (System.String sHostname) [0x00102] in <186d138a6ba64111bc4131af9c9cbf93>: 0

Does this mean that this feature (HTTPS decrypt) is not supported on linux? Or do I make some kind of mistake?

How I run fiddler: mono Fiddler.exe (or sudo mono Fiddler.exe, nothing changes).

My fiddler settings: http://i.imgur.com/eT9fh0s.png (sorry for the colors, conflicts with my theme)

Thanks.

[Simeon]

Hello,

Recently, I have noticed a similar issue with the latest version of Mono 5.20.0 on a Mac.

I confirm that it works with Mono 5.16 on Ubuntu 18.04

Could you please, report the Mono version on your xubuntu 18.04

Regards,
Simeon
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[v405827]

Mono JIT compiler version 5.20.1.19

[v405827]

Ok, I tested on mono v5.16.0.220, and it works great (at least at first glance :)).

Please, if you do not have the opportunity to correct work on newer versions of mono right now, add information to the download page or something like that. For a long time I could not understand what the problem was.

[Simeon]

Hi,

Thanks for the feedback. I have tracked that we have to update our docs about this and I hope that it will be live soon.

Regards,
Simeon
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[Marco]

I can confim this issue with Mono. HTTPs decryption wasnt working because of "Failed to create certificate for sub.domain.tld: Operation is not supported on this platform

It works after I downgraded my mono package in arch from  5.20.1.19-1 to 5.18.1.0-1  So 5.15 should be fine too, what happend in 5.20? :-(

[Simeon]

Thanks Marco, I have updated the issue in the fiddler-docs repository.

Regards,
Simeon
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