Make sure you are running the Android Studio 3.1 Canary or later to support Kotlin development
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:
#PLUG IN CARD READER FOR ANDROID PHONE FULL#
When the command has been successfully executed, we usually get a ` 90 00` status (See the full list of possible responses in here) 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. SW1 & SW2: are the status bytes, they are separated because sometimes the first byte can tell us the actual status, and the second byte can specify more information about that status. Once the card receives the command, it will respond with an APDU response as follow:ĭata Field: is the the body of the response Le: is the length of the expected responseĪnd so an example to select a file or Applet with an `ID = A0000002471001` will be as follow: `00 A4 0400 07 A0000002471001 00` Click here for the list of the possible casesĭata: is the actual data for the Instruction P1 & P2: these two Parameter bytes are used for further customization of the Instruction, they depend on what custom commands the card specifies.
INS: the Instruction byte is used to indicate what method we want to execute, this can be a variety of methods like: `A4` to Select a File or Applet, `B0` to Read a Binary, `D0` to Write a Binary … (see full list of Instructions here ) To keep things simple, we will not be using this byte in our example and we will be passing `00` all the time. Important: In all the following, we will refer to bytes in their Hexadecimal representations, like `A0`, `FE`, `00` …ĬLA: 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.
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