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Re: OpenSSL disables TLS 1.0 and 1.1




On Mon, Aug 07, 2017 at 05:22:51PM +0200, Joerg Jaspert wrote:
> I wonder if there is a middle way that ensures that all new stuff does
> go TLS1.2 (or later, whenever), but does allow older stuff still to
> work. Which isnt the case if they are just disabled.

I could change the default settings to set the minimum supported
version as TLS 1.2. That is, act like
SSL_CTX_set_min_proto_version() was called with TLS1_2_VERSION.
That would allow applications to override this this by calling
SSL_CTX_set_min_proto_version(). But then those are new
functions in 1.1.0 and they probably aren't supported by many
applications.

An other alternative is to use the deprecated SSL_CTX_set_options
options (SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1) by default, but then
there is probably no software that has support for clearing those
with SSL_CTX_clear_options()


Kurt