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How to trust a website only when there is manually imported certificate?

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Hello,

how to trust a website only when there is manually imported certificate?

I disabled all CAs and want to set FF to: 1) trust (and connect) only to sites for which I have imported certificate 2) do NOT trust to any other certificate (even issued by CA with imported cert).

Even if I have the certificate in the "Servers" list, FF still complains :( Tried in FF 39, 41 and 42 (linux 64bit).

Many thanks

Chosen solution

OK, thanks for your time.

The solution is: add the certificate exception in non-private firefox window. After restart, the cert is in cert_override.txt file in profile folder and Firefox connects to the server even if the root CA trust bits are disabled.

This is exactly the behavior I was looking for :)

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All Replies (6)

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Hi, When you say FF still complains :( can you please provide a screenshot of the error, we will need some more info to help.

For reference:

Note, real question might be was config entries need to be disabled.

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Hi, thanks for reply!

By "FF still complains" I mean standard error page "This Connection is Untrusted" with, or without, "Add exception" button.

To give you a real example:

I have current certificate for support.mozilla.org (SHA-256 = 2F:D5:63:1B:B0:CF:A0:1E:86:B3:F2:78:F1:0B:00:6F:5A:4B:E2:58:50:10:5E:0B:A3:A8:6E:4B:C4:5F:9F:1B) manually imported in Preferences->Advanced->Certificates->View Certificates->Servers list. I also have the root CA for this certificate (DigiCert High Assurance EV Root CA) distrusted (all 3 bits off).

But when I connect to the https://support.mozilla.org, I get the Untrusted Connection error page.

I want to set that the *manually imported* certificate (identified by checksums etc) would allow the connection even if his root CA is distrusted.

Any ideas how to do set it?

Thanks!

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Only if trust bit(s) are set then you can trust a website. You would normally have the trust bits set on a built-in root certificate. I assume that you would have to import the certificate under the authorities tab and set its trust bits to trust websites.

I don't know for what reason you have distrusted all built-in root certificates, but doing that doesn't make this easier.

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> I don't know for what reason you have distrusted all built-in root certificates, but doing that doesn't make this easier.

I explained this at the beginning. I want to trust only to manually imported certificates, not to any certificate from the root CAs. So the "set root CA's trust bits on" is not a solution. I hope it is clearer now.

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Yes, both senarios are recognized as mis-issued in Mozilla's CA certificate policy. Mentioned here

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Chosen Solution

OK, thanks for your time.

The solution is: add the certificate exception in non-private firefox window. After restart, the cert is in cert_override.txt file in profile folder and Firefox connects to the server even if the root CA trust bits are disabled.

This is exactly the behavior I was looking for :)