Function safe_app::ffi::crypto::enc_secret_key_new

#[no_mangle]
pub unsafe extern "C" fn enc_secret_key_new(
    app: *const App, 
    data: *const AsymSecretKey, 
    user_data: *mut c_void, 
    o_cb: extern "C" fn(user_data: *mut c_void, result: *const FfiResult, sk_h: EncryptSecKeyHandle)
)

Create new private encryption key from raw array.

Callback parameters: user data, error code, secret encrypt key handle