Re: deskutils/nextcloudclient Cannot connect securely to

From: Michael Gmelin <freebsd_at_grem.de>
Date: Fri, 29 Oct 2021 12:16:32 UTC

> On 29. Oct 2021, at 14:12, Per olof Ljungmark <peo@nethead.se> wrote:
> 
> ´╗┐On 10/25/21 16:22, Per olof Ljungmark wrote:
>>> On 10/25/21 09:51, Guido Falsi wrote:
>>> On 25/10/21 08:14, Per olof Ljungmark wrote:
>>>> FreeBSD 12-STABLE from Oct 15
>>>> nextcloudclient 3.3.5
>>>> 
>>>> I get popup messages from the client stating "Untrusted Certificate Cannot connect securely to [server-name]".
>>>> 
>>>> Browser access to the server is fine, no errors.
>>>> 
>>>> Using truss, it seems it looks for and finds
>>>> fstatat(AT_FDCWD,"/etc/ssl/certs//2e5ac55d.0",{ mode=-r--r--r-- ,inode=192371,size=4665,blksize=5120 },0x0) = 0 (0x0)
>>>> open("/etc/ssl/certs//2e5ac55d.0",O_RDONLY,0666) = 106535 (0x1a027)
>>>> 
>>>> But 2e5ac55d.0 (DST_Root_CA_X3.pem) has expired.
>>>> 
>>>> It also looks for 8d33f237.0, but it does not exist:
>>>> fstatat(AT_FDCWD,"/etc/ssl/certs//8d33f237.0",0x7fffdf5f70a0,0x0) ERR#2 'No such file or directory'
>>>> 
>>>> How do I convince it to instead look for 4042bcee.0 which is the ISRG_Root_X1.pem used by Letsencrypt?
>>> 
>>> Ref: https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/
>>> 
>>> What version of openssl are you using? versions before 1.1.0 show this behavior.
>>> 
>>> Maybe a possible workaround is to manually remove the expired certificate from the list of trusted ones.
>>> 
>>> I guess you are using the ones installed by security/ca_root_nss, in which case you'll need to modify their list.
>>> 
>> Deleting the link /etc/ssl/certs did the trick it see,s, no more popups since an hour.
>> Still wondering why this happens though...
> 
> As a final note, I just updated my laptop to latest 12-STABLE and nextcloudclient 3.3.5 and no problem with certificates. So the reason remains unknown but at least everything works as expected.
> 

This was certainly related to the letsencrypt issuing CA expiry (seen the same on a nextcloud windows client).

-m

> Per