JavaCard OS

Hey all here,

I need to implement SCP03 by myself. Now I am trying to implement KDF and PRF. I wonder if there are any API functions beside AES cipher and key handling I could use?

Thanks a lot.

You need to strictly follow the GP spec when implementing SCP03. SO JUST USE AES cipher.

The main thing I am worried about is implementation of key derivation.

The AES implementation on my card is written by native code. But I wrote this part using JAVA not native code, will there any problems?

You don't need to worry about this.
In fact, AES is the same no matter by which language you implement.
Derivation will produce the same results in all languages.