How can I use new HTTPS localhost certificate

Question

I have a problem with HTTPS when I am running (dotnet run) my .NetCore application locally on Windows. It was working till my localhost certificate expired…

I clean up old certificates and generated the new one by

dotnet dev-certs https –clean dotnet dev-certs https –trust

I’ve verified that everything was added to certmgr (Personal and Trusted certs), but I have the same problem. It is keep trying to use old certificate which expired. I do not know why it is trying to use old “localhost” certificate after clean up certs…

Do you have any idea what should I do?.

Thank you, Błażej

Refer to github.com/aspnet/AspNetCore.Docs/issues/13928 and learn.microsoft.com/en-us/aspnet/core/security/… , check platform specific suggestions in above links — Nan Yu
– Nan Yu, Commented Oct 15, 2019 at 2:36
And try manually remove all the found certificates from both Personal and Trusted root certification authorities , try reinstall again . — Nan Yu
– Nan Yu, Commented Oct 15, 2019 at 2:38
@NanYu I am using Windows and I was trying every platform specific suggestions which are in above links — Blagalin
– Blagalin, Commented Oct 15, 2019 at 5:37
Do you try to manually remove certs from Personal and Trusted root certification authorities , and try reinstall again ? — Nan Yu
– Nan Yu, Commented Oct 15, 2019 at 6:03
Yes. I removed localhost certs from .Net Dev Cert and reinstalled them. It does not help me. Currently I am not using a HTTPS on localhost, so I can develop my things, but it will be nice to fix the problem for future — Blagalin
– Blagalin, Commented Oct 15, 2019 at 7:26

Maxim · Accepted Answer · 2021-04-20 16:40:45Z

40

If not helps recreate cert by commands:

dotnet dev-certs https ––clean dotnet dev-certs https ––trust

Clean all private keys from folder:

C:\Users\{User}\AppData\Roaming\ASP.NET\Https

answered Apr 20, 2021 at 16:40

Maxim

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4 Comments

IntoNET Over a year ago

I've battled this issue for 2 days - cleaning the private keys did the trick. Thanks!!!

Wellspring Over a year ago

I will name my next child after @Maxim

mnc Over a year ago

Cleaning the private keys also did the trick for me. Thanks!

oiBio Over a year ago

Same for me, this should be the aceppted answer

KyleMit · Accepted Answer · 2020-10-26 19:00:54Z

You need to use two hyphens. The flag is -t or --trust, not –trust so the following should work:

dotnet dev-certs https --trust

You can also run the help command to see more info

dotnet dev-certs https --help

See Also: How to run dotnet dev-certs https --trust?

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