Using RSA with 2 keys?

[da...@ftecu.com]

I've looked over the PDF (1.18.2) and googled for various examples (as well as this mailing list and github issues), but I'm not able to figure out how to use rsa_encrypt/decrypt_key with 2 keys?

I have 2 keys, say, key_A & key_B, each with public and private keys.  But I can only pass in one key structure to rsa_encrypt_key or rsa_decrypt_key.

So, how do I create a key with key_A private key and key_B public key to encrypt (or key_A public and key_B private to decrypt)?  Importing or setting key function seems to create only 1 set of private/public keys or public key only.

The example code in PDF [10.10] creates only 1 key pair so it's no help at all. [I also looked at rsa_test.c but it seems to use only 1 key pairs, not 2.]

Or did I miss something in the docs about how to do this?

Thanks for any help.  Danny