certtool --generate-dh-params: Size of generator in 2.12.19 and 3.0.19

[Andreas Metzler]

On 2012-05-27 Andreas Metzler <ametzler at downhill.at.eu.org> wrote:
[...]
> ------------------

> + 3.0.19 Uses a large value for Generator
> + In 3.0.19 the size of "Prime" is not constant.

> ("openssl dhparam" produces results similar to 2.12.19.)

> Do DH paramater files generated with OpenSSL/GnuTLS-2.12.19 work fine with
> GnuTLS-3.0.19, or the other way round do DH paramater files generated
> with GnuTLS-3.0.19 work fine with OpenSSL/GnuTLS-2.12.19?

I have stumbled upon
http://nikmav.blogspot.com/2011/12/generating-diffie-hellman-parameters.html
which afaiu answers these questions with: Cross-Compability is no
problem, but GnuTLS 3 should be faster with a file written by GnuTLS 3
because privateValueLength is used if present.

Do I understand this correctly?

thanks, cu andreas