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Re: curl server certificate verification failed for a few sites

From: Giovanni Biscuolo
Subject: Re: curl server certificate verification failed for a few sites
Date: Thu, 04 Jun 2020 18:14:42 +0200

Hi Jack,

thanks for your help!
...and sorry if this is not Guix specific

Jack Hill <> writes:


> I think that this is due to the recent AdTrust Root CA cert expiration 
> [0]. The error wget gives is a little bit better, but you know about the 
> situation to interpret it correctly:
> """
> $ wget ""; -O /dev/null
> --2020-06-04 10:37:29--
> Resolving ( 
>,,, ...
> Connecting to 
> (||:443... connected.
> ERROR: The certificate of ‘’ is not trusted.
> ERROR: The certificate of ‘’ has expired.
> """

oh I see, I get this error also... but I do not understand the different
behaviour with what I see in Firefox (from Debian) or ungoogled-chromium
(from Guix): using one of those browsers the certificate is valid, the
certificate viewer shows that the root in cert hierarchy is "USERTrust
RSA Certification Authority"

The section in [0] titled "Certificate Chain Diagram" states:

--8<---------------cut here---------------start------------->8---

A legacy browser or older device that does not have the modern
“USERTRust” root would not trust it and so would look further up the
chain to a root it does trust, the AddTrust External CA Root. A more
modern browser would have the USERTrust root already installed and trust
itwithout needing to rely on the older AddTrust root.

--8<---------------cut here---------------end--------------->8---

I do not fully understand why curl and wget return error while Firefox
and ungoogled-chromium not


> Therefore, I think the fix is for to update the 
> certificate chain/bundle that they are sending.
> [0]

this page states:

--8<---------------cut here---------------start------------->8---

Will my certificate still be trusted after May 30, 2020?

Yes. All modern clients and operating systems have the newer, modern
COMODO and USERTrust roots which don’t expire until 2038.

--8<---------------cut here---------------end--------------->8---

Thanks! Gio'

Giovanni Biscuolo

Xelera IT Infrastructures

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