This involves:
- A directory of valid and invalid PEM-encoded curves.
This is non-exhaustive and can be added to.
- A minor patch to 'openssl ecparam' to make it exit non-zero
when curve validation fails.
- A test recipe is added in a separate commit.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2544)
