base and buildbots: certificate issues

[mascguy (Christopher Nielsen)]

It looks like we're experiencing certificate issues, both on the buildbots, as well as locally. It's not clear whether this is related to the certificate authorities, our own certs, or something else.

On multiple buildbots, I'm seeing different variations of certificate validation errors. And this is occurring across multiple mirrors; both our own, as well as those from 3rd-parties:

​https://build.macports.org/builders/ports-10.10_x86_64-builder/builds/156470/steps/install-port/logs/stdio

--->  Attempting to fetch rrdtool-1.7.2.tar.gz from https://distfiles.macports.org/rrdtool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
DEBUG: Fetching distfile failed: SSL certificate problem: Invalid certificate chain

​https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/74262/steps/install-port/logs/stdio

--->  Attempting to fetch rrdtool-1.7.2.tar.gz from http://oss.oetiker.ch/rrdtool/pub/
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
DEBUG: Fetching distfile failed: error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version

​https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/124365/steps/install-port/logs/stdio

--->  Attempting to fetch rrdtool-1.7.2.tar.gz from http://oss.oetiker.ch/rrdtool/pub/
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
DEBUG: Fetching distfile failed: SSL certificate problem: certificate has expired

These appear to be sporadic, as they aren't occurring across-the-board.

In addition, I'm also seeing certificate errors locally, though those are also sporadic.

[chrstphrchvz (Christopher Chavez)]

Possibly related to Let’s Encrypt expiration on 10.14 and earlier: ​https://lists.macports.org/pipermail/macports-users/2021-October/050298.html

[ryandesign (Ryan Carsten Schmidt)]

Yes.

I've added the new Let's Encrypt root certificate to the buildbot machines (workers for 10.6-10.11 and the 10.11 machine doing distfile mirroring) to fix this. I forced new builds of rrdtool and the few other ports that had failed due to this.

I don't have a solution for 10.13 and 10.14 yet.

[mascguy (Christopher Nielsen)]

It looks like this commit fixed the issue for MacPorts Base:

​Commit d8986b2 - Limit OS versions that use Let's Encrypt sites

Thanks Ryan!

[mascguy (Christopher Nielsen)]

Hmmmm, I spoke too soon: Even with the aforementioned commit, SSL errors are still occurring locally. Ugh...

[ryandesign (Ryan Carsten Schmidt)]

On 10.13 and 10.14, SSL errors will continue when attempting to access sites with Let's Encrypt certificates (possibly only those that are still configured to send the old expired root certificate, which is Let's Encrypt's default) using /usr/bin/curl or /usr/lib/libcurl.dylib. If anyone knows a solution, let us know. 10.12 and 10.15 and later should not be affected. 10.11 and earlier can be fixed by installing the new root certificate locally; see ProblemHotlist#letsencrypt.