OpenVPNGui 2.4.7 fails: format error in certificate's notAfter field

Richard Levitte levitte at
Wed Mar 6 10:06:30 UTC 2019

On Wed, 06 Mar 2019 10:52:44 +0100,
Jan Just Keijser wrote:
> as a follow-up:  Richard's analysis/suspicion was spot on.
> However, it was the *server* side certificate that was causing the
> error, and the server certificate does indeed contain a poorly
> formatted date:
> $ openssl asn1parse -in server.crt | grep UTC
>   157:d=3  hl=2 l=  13 prim: UTCTIME           :091022132829Z
>   172:d=3  hl=2 l=  17 prim: UTCTIME           :370308132808+0000

I'm glad I could help find the answer.

> OpenSSL 1.0.x groks this, 1.1+ does not.

Yup, 1.1+ is stricter regarding these things.


Richard Levitte         levitte at
OpenSSL Project

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