iOS Question [SOLVED] Cryptography: need AES-CTR and ECDH Public key exchange

Hi all,

In order to communicate with a secure element through BLE, I need to perform an ECDH PKE process with NIST P256 and then encrypt/decrypt blocs with AES-CTR.
I've used iEncryption in the past, but I think it doesn't include these options.

Has someone used them with an already existing (core or 3rd party) library/framework? It would be ideal if it could be done through inline Objective-C.

Thanks in advance