Answers from three years ago can not be considered current.
However, crypto libraries are essential.
I am not aware of one crypto lib that is better maintained than OpenSSL in its current form.
Basically it is the Industry standard.
What has happened in the past is that OpenSSL kept supporting protocols that are unsafe.
That policy has been dropped a long time ago, unless you compile openSSL yourself.
The problem you are facing is that the world has turned upside down and your library is not current.
For FPC this does not matter.