[bifurcation]

Other things I use all the time:

`openssl x509 -in $FILE -text | less`

https://lapo.it/asn1js

https://golang.org/pkg/crypto/x509/

https://github.com/agl/certificatetransparency

[Nursie]

There's a load of useful stuff in the OpenSSL commandline, figuring out s_server and s_client can be very useful for debugging.

GnuTLS has some useful stuff too, IIRC