Decrypting HTTPS traffic/Certificate issues

8 posts, 0 answers
  1. Wei Ler
    Wei Ler avatar
    2 posts
    Member since:
    Sep 2017

    Posted 10 Sep 2017 Link to this post

    Hello, I'm a new fiddler user trying to configure to capture traffic from the iOS connected. I'm trying to follow this one here, http://docs.telerik.com/fiddler/Configure-Fiddler/Tasks/ConfigureForiOS, but got stuck at the steps to decrypt HTTPS traffic from iOS devices. I've installed certmaker, but when I tried to configure windows client to trust fiddler root certificates, it all went haywire with loads of errors around.

    Firstly, when i try to enable HTTPS traffic decryption by clicking the decrypt HTTPS traffic box, a box showing "Could not load type 'Fiddler.lCertificateProvider4' from assembly 'Fiddler, Version=4.6.20172.34691, Culture=neutral, PublicKeyToken=null'." appears.

    If I ignore the box and proceed with trusting the root certificate, the same box appears instead of the installing certificate notice.

    Next, if I tried to export the certificate from what I've read around, this shows up: "---------------------------
    Certificate Export Failed
    ---------------------------
    Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report at http://www.telerik.com/forums/fiddler.

    Could not load type 'Fiddler.ICertificateProvider4' from assembly 'Fiddler, Version=4.6.20172.34691, Culture=neutral, PublicKeyToken=null'.

    Type: System.TypeLoadException
    Source: mscorlib
       at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes)

       at System.Reflection.RuntimeAssembly.GetExportedTypes()

       at Fiddler.CertMaker.Œ() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\CertMaker.cs:line 111

       at Fiddler.CertMaker.EnsureReady() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\CertMaker.cs:line 69

       at Fiddler.CertMaker.() in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\CertMaker.cs:line 184


    Fiddler v4.6.20172.34691 (x64 AMD64) [.NET 4.0.30319.34209 on Microsoft Windows NT 6.3.9600.0] 
    ---------------------------
    OK   
    ---------------------------
    "

    Am at a big loss here, could it be the certmaker that is the issue or did I configured wrongly ?

  2. John
    John avatar
    1 posts
    Member since:
    Sep 2017

    Posted 11 Sep 2017 in reply to Wei Ler Link to this post

    I'm facing the same issue too. And it seems like CertMaker is the culprit here, once I uninstalled CertMaker addon I was able to generate root certificate and decrypt HTTPS traffic.
  3. Wei Ler
    Wei Ler avatar
    2 posts
    Member since:
    Sep 2017

    Posted 11 Sep 2017 in reply to John Link to this post

    Alright ! I'll give it a shot and see how that goes !     
  4. Daniel
    Daniel avatar
    2 posts
    Member since:
    Sep 2017

    Posted 12 Sep 2017 Link to this post

    I uninstalled the CertMaker extension but that did not solve my problem. While I no longer receive the error when attempting to create a certificate, and instead it is automatically generated, the certificate that was installed on my iPhone is listed as "Not Verified". Consequently, none of the HTTPS requests that were captured from my iPhone are decrypted. I've tried this on both my Windows 7 and Windows 10 laptop at work.  The problem seems to be with the certificate.  It used to be "Verified" under my profiles in device management. Now I wish that I hadn't deleted those.
  5. Yazif
    Yazif avatar
    1 posts
    Member since:
    Sep 2017

    Posted 13 Sep 2017 Link to this post

    I'm facing the same problem. Tried reinstalling fiddler and cert maker to no avail. I'll  have to try another tool.
  6. Tsviatko Yovtchev
    Admin
    Tsviatko Yovtchev avatar
    549 posts

    Posted 14 Sep 2017 Link to this post

    Hello,

    We are aware of the problem and we're working on a fix. Please, stay tuned for more information on this.

    Regards,
    Tsviatko Yovtchev
    Progress Telerik
    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items
  7. Alexander
    Admin
    Alexander avatar
    336 posts

    Posted 19 Sep 2017 Link to this post

    Hi all,

    We've just released new version of Fiddler and this problem is now fixed. Please, excuse us for the inconvenience caused.

    Regards,
    Alexander
    Progress Telerik
    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items
  8. Daniel
    Daniel avatar
    2 posts
    Member since:
    Sep 2017

    Posted 19 Sep 2017 in reply to Alexander Link to this post

    Thanks for fixing it so quickly!!
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