certs: E1 / E5 -> ISRG Root X2

Browse source

In the beginning of Let's Encrypt their root certificate ISRG Root X1
was not widely trusted, at least some older and/or mobile platforms were
missing that certificate in their root certificate store.
At that time Let's Encrypt was using an alternative chain of trust,
where a certificate was cross-signed with DST Root CA X3.

To make sure a valid chain of trust is available under all circumstances
a set of all certificates had to be supplied: both root vertificates
ISRG Root X1 & DST Root CA X3, and an intermediate certificate.
This was still true after DST Root CA X3 expired, as it could still be
used as a root anchor and was shipped by Let's Encrypt when requested. 🤪

This time is finally over, and we have a clean chain for trust ending in
ISRG Root X1 (or ISRG Root X2).
Well, actually it is the other way round... Let's Encrypt signs with
different tantamount intermediate certificates. There is not only E5, but
also E6 - and we can not know beforehand which one is used on renew.

So let's jetzt drop the intermediate certificates now, and rely on root
certificates only. We are perfectly fine with this these days.

Follow-up commits will do the same for *all* certificates.

The certificate is downloaded with:

    curl -d '["ISRG Root X2"]' https://mkcert.org/generate/ | grep -v '^$' > certs/ISRG-Root-X2.pem

...

This commit is contained in:

Christian Hesse 2024-06-20 09:50:39 +02:00

parent 35f4ec0b1d

commit d1693a241b

10 changed files with 38 additions and 263 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

BIN

README.d/01-download-certs.avif

View file

Binary file not shown.

Side by side Swipe Overlay Before Width:  |  Height:  |  Size: 4.5 KiB After Width:  |  Height:  |  Size: 4.5 KiB

BIN

README.d/02-import-certs.avif

View file

Binary file not shown.

Side by side Swipe Overlay Before Width:  |  Height:  |  Size: 3.5 KiB After Width:  |  Height:  |  Size: 3.5 KiB

BIN

README.d/03-check-certs.avif

View file

Binary file not shown.

Side by side Swipe Overlay Before Width:  |  Height:  |  Size: 12 KiB After Width:  |  Height:  |  Size: 8.7 KiB