Try RSA_new_method when allocating the RSA_METHOD.  It takes an engine argument 
which will be used for related operations.





Dr Paul Dale | Cryptographer | Network Security & Encryption 

Phone +61 7 3031 7217

Oracle Australia


From: Jayalakshmi bhat [] 
Sent: Monday, 19 February 2018 7:16 PM
Subject: [openssl-users] How to make OpenSSL engine usage application specific?


Hello All,


We have 2 RSA OpenSSL engines in our product. Both the engines performs same 
RSA encyrpt/decrypt operations. For easy explaination I am naming engines as


1. RSA smart card  engine 

2. RSA TPM engine 


Engine usage is application specific.There are couple of applications dependent 
on RSA TPM  engine. And are few applications dependent on RSA smart card 

We wanted to know if there are any APIs provided by OpenSSL to make the engine 
usage application specific? Is there any way we can make OpenSSL chose specific 
engine for

specific application.





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