Following scenario:

I have an engine that implements e.g. RSA decryption.
That engine links against a library that links against libcrypto to perform RSA 
decryption.

Now if I have an application that sets the default library to be my engine, 
won't I end up in an infinite loop ?

Or the other way around:
- Is there a way to change the default engine from within my engine before 
calling out to the library ?
- Can the library itself select "software-only" as an engine ?

I guess I don't have a concrete problem in my specific case, since I have 
app_data attached to any key and
if my engine receives a key without app_data, it will just call SSLeay() 
functions.

But what if that was not the case ?

Thanks a lot for any help,
Andreas

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