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 https://github.com/aspnet/AspNetCore.Docs/issues/13928 and https://learn.microsoft.com/en-us/aspnet/core/security/enforcing-ssl?view=aspnetcore-3.0&branch=pr-en-us-14568&tabs=visual-studio#troubleshoot-certificate-problems , check platform specific suggestions in above links — Nan Yu, Oct 15 '19 at 02:36
And try manually remove all the found certificates from both Personal and Trusted root certification authorities , try reinstall again . — Nan Yu, Oct 15 '19 at 02:38
@NanYu I am using Windows and I was trying every platform specific suggestions which are in above links — Blagalin, Oct 15 '19 at 05:37
Do you try to manually remove certs from Personal and Trusted root certification authorities , and try reinstall again ? — Nan Yu, Oct 15 '19 at 06:03
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, Oct 15 '19 at 07:26

score 30 · Answer 1 · answered Apr 20 '21 at 16:40

30

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 '21 at 16:40

Maxim

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I've battled this issue for 2 days - cleaning the private keys did the trick. Thanks!!! – IntoNET Sep 23 '21 at 21:55
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I will name my next child after @Maxim – Wellspring Mar 14 '22 at 19:03
Cleaning the private keys also did the trick for me. Thanks! – mnc Aug 19 '22 at 10:41
Same for me, this should be the aceppted answer – oiBio Feb 08 '23 at 20:31

score 2 · Answer 2 · answered Oct 26 '20 at 19:00

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?

How can I use new HTTPS localhost certificate

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