This is intentionally decoupled in the HCE design: it does To a simple interface through a socket communication.Simulate a contact-less Java Card with Android Smart Card EmulatorSimulate a contact-less smart card with a remote virtual smart cardRelaying a contact-based smart card with pcsc-relayThe Android Smart Card Emulator has the following dependencies:Please note that the currently emulated applets are verifying the PIN by

consists of up to 16 bytes.

that the payment networks united in EMVCo have specified in their "Contactless devices should be assumed to have a random UID. processor off completely when the screen of the device is turned off. © Copyright 2009-2017 by Dominik Oepen and Frank Morgner. Allows the app to create network sockets and use custom network protocols. It is mandatory to have at least one root DF which is called Master File (MF).EF/Elementary Files: These are files containing binary data that can be read or written to by an external reader.APDU commands are byte arrays containing the following:CLA: the Class byte is used to indicate to what extent the command complies with the ISO7816, and if so, what kind of “Secure Messaging” will be used.

Since other bits may be set, readers wanting to interact with If you take Phone B with our Card Reader App, and put your ePassport back (where the Chip is) on the NFC reader of the phone, you will see the The APDU command we are sending to the Card is the same we saw on the first paragraph. the This section is of interest for developers that have deployed an application AID as per 7816-5 if you are deploying a HCE application for Android, as it will avoid

Additionally, to tell the platform which AIDs groups are requested by this

Smart Card Emulator. transaction is complete, an Android application can query the secure element While this setting element and not by the Android service itself. default service in the Android settings UI.

select applications, centered around an Application ID (AID). AID is not found in the routing table, the default route is used. Nowadays the emulator is much faster with better performance and with easy settings option. The declaration of such a service is It is built and signed by F-Droid, and guaranteed to correspond to response provided by the NFC controller on a HCE device:Note that many HCE devices are likely made compliant with protocol requirements Many Android-powered devices that offer NFC functionality already support NFC card

The response APDUs are then returned to the smart card reader. Communication Protocol" specification. Many existing contactless cards are already based on these is designed to work in parallel with other methods of implementing card Please use our Copy link Quote reply GrayBoltWolf commented Aug 22, 2015. Moreover, the API doesn't give you any means to specify if card emulation should be done using Type A or Type B protocol. Android extracts that AID from the APDU, resolves it to an HCE service, the NFC protocols. The emulator uses Android's HCE to fetch process APDUs from a NFC reader. 1. These protocols are also

are required to meet NFC Forum requirements for the ATS response, so NFC readers

from the reader directly to the secure element. Android merely needs to know which AIDs can be handled read The exceptions are:Android itself will never start or bind to a service that is declared as "off

that relies on a secure element for card emulation. To do that, let’s create a new Android project: New → New ProjectMake sure you are checking the `Include Kotlin support` checkbox, and click “Next”Make sure you are selecting API 19 or higher, as the Card Emulation is only supported starting Android 4.4. emulation, including the use of secure elements.This coexistence is based on a principle called "AID routing": the NFC

then forwards that APDU to the resolved service.You can send a response APDU by returning the bytes of the response APDU from Click Ok.Now we will extend `HostApduService` Abstract Class and implement its abstract methods:The `onDeactiveted` method will be called when the a different AID has been selected or the NFC connection has been lost.The `processCommandApdu` method will be called every time a card reader sends an APDU command that is filtered by our manifest filter.Let’s define a few constants to work with, before the first method, add the following:Just go ahead and write this inside the `onDeactivated`:Before implementing the `processCommandApdu` method, we will need a couple of helper methods. can count on these parameters being set in accordance with NFC Forum controller keeps a routing table that consists of a (finite) list of routing defaults at the category level instead of the AID level. device is a "SELECT AID" APDU; this APDU contains the AID that the reader wants For example, if we use a command to “Verify a PIN” with the wrong PIN, the card will return a status of `63 CX` where X is the number of attempts left, that way, the reader app can easily check the first byte for the status and second for the number of attempts left.When the command has been successfully executed, we usually get a `Using the information above, we are now ready to create a Smart Card Emulator and a Smart Card Reader in Android, let’s get right into it:Starting from Android 4.4, we have the possibility to create a Card Emulation Service, that will act as a Smart Card by taking APDU commands and returning APDU responses. This version requires Android 4.4 or newer. Lisans:GNU General Public License v3.0 only; Web Sitesi; Sorun İzleyici; Kaynak Kodu; İnşa Üst Verisi; Teknik bilgi; Paketler. supported by many NFC readers in the market today, including Android NFC

This allows any Android application to emulate a card and talk directly to the NFC reader.