apdu | quick smartcard APDU read-evaluate-print loop shell | Telnet library

hello i'm working with APDU command for writting and reading a RFID card . I can read from the block num 2 and write a data of 16 bytes . but i have a problem in writting a longer data so how can i mange i have tried to write in two blocks but it doesnt work. this the way that i have implemented my code in the operation of writing

Hellow,

Hope you are doing great.

I am reading data from AHUs but while fetching the list of objects it gives an error: segmentationNotSupported. On sending WhoIsIAm (bacnet_scan.py), I get this response:

I'm trying to send my public key from my key pair in an APDU so that a signature can be verified in another program. So far I've not been able to find anyway to get the key into the APDU buffer.

I have found solutions online that use RSAPublicKey.getExponent() to store the key in a byte array (then add it to the buffer) but as I'm not using an RSAPublicKey this has not been that helpful. Is this the only way to do it? Do I need to use RSAPublicKey instead of a key pair, or is there some way of putting the public key from my key pair into the APDU buffer?

This is my key generation code:

everyone, I'm developing a project with LTE 4G module and having a problem described as following:

1. I write a SIM card application (with Java tech) and download it into the SIM Card.
2. After downloading the applet, inert the SIM card into a card reader, then I can send APDUs to the applet through this card reader. applet works fine ,it accepts the APDU and gives the response back.
3. After finishing the APDU test , I insert the SIM card to the LTE 4G module ,and send AT+CCHO="A0BB01020304050001"(A0BB01020304050001 is my applet DF name) through uart to open the applet, the 4G module returns +CME ERROR: 15(SIM Wrong).But some other original applet(such as USIM) in the card can be opend normally in this way.

so,does anyone know whether there are some key points I have to pay attention to my applet or the AT+CCHO command? I'll be very appreciated and willing to give what all I have.

I'm trying to write to a Mifare Ultralight NFC but I get this error:

I am developing an android application creating NFC card ID. I can get info from scanned NFC cards by phone. But I can't create them with my app. First, I tried to do that with this method. Then, I realized need to have Tag object and tried to save it in different ways. Although it didn't work.

Secondly, I found this from android documentations. Then, I tried to do with HostNfcFService and HostApduService. To use them I created XML files and service classes like below;

nfcfservice.xml:

I am currently working on adding auto-detection of KNX devices as part of the Apache PLC4X KNX drivers (Currently working on the Golang version). I have made great progress on inspection of KNX devices, but just encountered a situation where a device claims to have a Max APDU of 55 bytes, but when reading some memory, it only responds with Standard frames which can only carry 12 bytes of payload.

I would like to be able to detect in advance if the device is able to send more than 12 bytes. But I'm a bit unsure how to do that. The device descriptor is 0701 which indicates a BIM M112 device. Does this profile of devices have a fixed APDU size of 15? I have multiple devices with that same profile and they don't respond with a Max APDU (They return with a count of 0 implying "not available" or "not permitted") so I default to 15. This particular ABB device however responds with 55, but doesn't send more than 12 bytes (which is identical to having a Max APDU of 15).

Help greatly appreciated.

Chris

I'm trying to implement the functionality for emulating a Mifare One (1K/S50, ISO14443A) chip to be able to use a phone with NFC capability instead of a physical Mifare card or, if possible sending only the data to the reader.

I have this type of reader/writer: https://www.evelta.com/er302-high-frequency-nfc-writer-usb/

After looking around on forums, stackoverflow questions I found this article to be the best example:

https://medium.com/the-almanac/how-to-build-a-simple-smart-card-emulator-reader-for-android-7975fae4040f

I implemented the HCE part, run the program, and the reader beleives my phone is a Mifare chip, so far so good.

My problems:

• No matter what "standard" Authentication key I tried to use...it gives me Auth error. I read this question about Auth: Authentication failure for Mifare 1K NFC tag using ACR122U NFC reader, it works on a physical Mifare card...but I don't know how to set or get to know the keys for the emulated one.

• I don't get why this example emulates that exact Mifare chip type...even breakpoints don't work in the APDUService, but the reader detecting a Mifare cheap somehow.

After reading about it, I get I can't 100% emulate a physical card, so I have to send all the data I want in my APDU response with the service somehow (I beleive it's the transreceive part).

However I can't even authenticate.

I tried to look for other possible solutions:

• AndroidBeam: Android - Android p2p...sounds simple, relatively high-level API, but it's being deprecated, moreover it's not guaranted that the reader will even use Android...it might be a 'simple' USB reader hardware like the one I use.

• SecureElement: Ironically...it seems to be the most recommended, I read that 'yes, it's possible for mifare' and things like that, yet I couldn't find a good example of it and the official Google docs don't have any good example. I read that it's for "ISO/IEC 7816-4", but Mifare 1K is ISO14443A, so I'm a bit sceptic about this API.

• "Simply" sending the data to the reader: If I could just simply "push" the data out to the reader when it's reading the phone without complicating the matter or emulating anything...it would be great but I don't know if it's even possible. This whole NFC topic seems to be more and more complex.

So alltogether I only need to do one thing: taking the data and send it to the reader.

I realized it's a fairy tale like illusion to beleive it's as simple as it sounds, still, I hope there is a way to do it.

If I could send the data in it's own, without emulating Mifare or anything...after all what matters is that the data on the card, not the type of the chip, the more simple the solution will be, the better.

Sorry for possible English grammar mistakes.

I'm going to delete an existent key from my card's ISD. To do so I sent a DELETE Key APDU command with corresponding KeyID and KeyVersion to the ISD after a successful Mutual Authentication as below: